Verfahren zum Betrieb einer Stromrichteranordnung zur Steuerung der Drehzahl einer an diese angeschlossenen, in beiden Drehrichtungen betriebenen Drehstrommaschine

Voice coil motor driver current curve mode automatic learning system

METHOD, ACTUATING DEVICE, OPTICAL SYSTEM AND LITHOGRAPHY SYSTEM

The invention relates to a method for operating a magnetic actuator (200), in particular for actuating an optical element (510) in an optical system (500), which is designed to provide a mechanical force (A) as a function of an electrical actuating power (PS), wherein the method comprises: A) determining (S1) a mathematical model of the actuator (200) which describes a change in a motor constant (k) of the actuator (200) as a function of the electrical actuating power (PS) supplied, B) actuating (S2) the actuator (200) with a first electrical actuating power (PS) as a function of to a predetermined target force (FS), C) determining (S3) the change in the motor constant (k) of the actuator (200) on the basis of the actuation of the actuator (200) with the first electrical actuating power (PS) by means of the mathematical model, D) determining (S4) a correction value for the first electrical actuating power (PS) according to the change in the motor constant (k) determined, and E) actuating ...

DRIVING CONTROL APPARATUS FOR ACTUATOR

Provided is a driving control apparatus that can control relaxation of a force in an actuator. The driving control apparatus is provided with: a driving control means for controlling driving of the actuator in accordance with a driving control signal; and a pressure control means for controlling, in accordance with a pressure control signal, involvement of the driving control signal in control of pressure generated by the actuator.

Servo controller blending

A method includes generating a first control signal and a second control signal; blending the first control signal and the second control signal based, at least in part, on a velocity; and positioning a read/write head based on the blending of the first control signal and the second control signal.

Electrodynamic DC linear motor with active braking device

The braking device is an active piezoelectric, magnetostrictive or shape memory element (5) which positions the body (6) of the "rotor" with its coil (2) opposite the fixed magnetic circuit comprising a flux guide (3) and permanent magnet (4) in the housing (1) of the stator. The brake is released automatically as soon as current passes through the motor to generate movement. It reshapes the direction of expansion with transmission of force or motion, and is applied within a very short time of attainment of standstill.

VOICE COIL MOTOR

Provided is a voice coil motor capable of reducing product costs and improving durability. The voice coil motor includes: a rotor including a bobbin including a bobbin body mounted therein with a lens, a coupling boss protruding from a lower end of the bobbin body, and a groove formed adjacent to the coupling boss in the lower end, and a coil block wound around a circumferential surface of the bobbin; a stator including a magnet facing the coil block, and a yoke for fixing the magnet; an elastic member including first elastic members having a first through-hole coupled to the coupling boss and a second though-hole exposing the groove, and a second elastic member coupled to an upper end facing the lower end of the bobbin body; and a reinforcing member for reinforcing bonding strength between the first elastic member and the bobbin body by using the second through-hole and the groove. COPYRIGHT KIPO 2017 ...

Full digital driving controller of permanent magnetic linear voice coil motor used for direct driving valve

The invention relates to a full digital driving controller of a permanent magnetic linear voice coil motor used for a direct driving valve, consisting of three parts: a digital controller, a power circuit and a signal detection circuit; the digital controller circuit comprises a 32-bit floating point DSP, a field programmable logic device FPGA and an external Flash ROM; the power circuit comprisesa high-speed optical coupling isolation circuit, and an H-bridge power main circuit consisting of intelligent power modules IPM; the signal detection circuit comprises an A/D converter, a multi-pathanalogue switch, a Hall current sensor used for detecting the moving coil winding current, a non-contact eddy current displacement sensor used for detecting the position of the moving coil and an amplification and active power filter circuit for analogue signals. The full digital driving controller of the permanent magnetic linear voice coil motor used for the direct driving valve has the advantages ...

보이스 코일 모터

... 보이스 코일 모터는 렌즈가 장착되는 보빈 몸체, 상기 보빈 몸체의 하단으로부터 돌출된 결합 보스 및 상기 결합 보스와 인접한 상기 하단으로부터 형성된 홈을 포함하는 보빈 및 상기 보빈의 외주면에 권선된 코일 블럭을 포함하는 가동자; 상기 코일 블럭과 마주하게 배치된 마그네트 및 상기 마그네트를 고정하는 요크를 포함하는 고정자; 상기 결합 보스에 결합 되는 제1 관통홀이 형성되고 상기 홈을 노출하는 제2 관통홀이 형성된 제1 탄성 부재들 및 상기 보빈 몸체의 상기 하단과 대향 하는 상단에 결합 된 제2 탄성 부재를 포함하는 탄성 부재; 및 상기 제2 관통홀 및 상기 홈을 이용하여 상기 제1 탄성 부재 및 상기 보빈 몸체의 결합 강도를 보강하는 보강 부재를 포함한다.

METHODS AND APPARATUS FOR DRIVER CALIBRATION

Various embodiments of the present technology may comprise methods and apparatus for driver calibration. The methods and apparatus may comprise various circuits and/or systems to minimize an offset output current (e.g., a drive current) due to an offset voltage in an operational amplifier. The methods and apparatus may comprise a current comparator circuit and a replica circuit that operate in conjunction with each other to monitor the drive current and provide a feedback signal, which is then used to adjust the drive current and improve the accuracy of the drive current.

Revolution regulation system for permanent magnet synchronous motor - switches from current regulation to load dependent regulation upon attaining required revs

The rev regulation system uses a current regulator (2) supplied with a constant network voltage and controlled to provide the max. motor current until the synchronous motor (1) attains the given revs. The current regulator output voltage is clocked for regulation of the current amplitude, until reaching the given revs, with subsequent switching to a different regulation mode using adjustment of the current regulator thyristor fixing points, in dependance on the motor load, relative to the firing points during free running of the motor (1). Pref. the different regulation modes are provided by 2 respective control stages (7,8) for the thyristor current regulator (2). ADVANTAGE - Allows increase in synchronous motor revs.

Voice coil motor driving method

VOICE COIL MOTOR DRIVING DEVICE AND DRIVING METHOD THEREOF

A motor driving device for driving a motor having a driving coil and a position detecting coil comprises: an adder adding a driving signal for driving the motor and a position detecting signal; an amplifier amplifying an output of the adder; and a current controller generating a current control signal for controlling current of a final driving terminal of the amplifier. According to the present invention, the motor is driven by an electromagnetic induction method without having a hole sensor, and accurate position information of a camera module for auto focus can be obtained. COPYRIGHT KIPO 2018 (100) Driving part (110) Driving controller (120) Digital-analog converter (130) Signal generator (200) Detection part (220) Analog-digital converter ...

ACTUATOR DRIVING DEVICE AND CAMERA MODULE INCLUDING SAME

According to one embodiment of the present invention, an actuator driving device includes: a sensing inductor disposed in a housing so as to face a sensing magnetic body, and receiving a reference signal so as to provide an inductor current varying in accordance with a change in a position of the magnetic body; a sensing portion for applying the reference signal to the sensing inductor and detecting the inductor current flowing in the sensing inductor; a determination portion for determining a position of a lens carrier in accordance with the inductor current; and a driving portion for driving the actuator in accordance with the position of the lens carrier and a position control signal, wherein the reference signal may be a square wave voltage signal. COPYRIGHT KIPO 2018 (111) Sensing inductor (113) Sensing portion (114) Determination portion (115) Driving portion (130) Actuator (200) Application IC ...

DEVICE FOR DRIVING VOICE COIL ACTUATOR IN CAMERA AND METHOD THEREFOR

Disclosed are a device for driving a voice coil actuator in a camera and a method therefor. The device for driving a voice coil actuator performs input shaping on the basis of a resonance frequency of the voice coil actuator and attenuation of vibration appearing in the voice coil actuator so as to generate a control signal having a shaping signal, as an initial input, from a primitive control signal, and drives the voice coil actuator by the control signal for which the input shaping has been performed. The shaping signal is for eliminating resonance of the voice coil actuator, and may include multi-step or toggle-type pure shaping signals having a form in which the range of signal fluctuation is gradually attenuated due to attenuation applied thereto or may be a convolution shaping signal having such pure shaping signals convoluted each other. Accordingly, the present invention can further improve residual vibration suppression performance and auto focus performance of the voice coil ...

STEUERANORDNUNG FUER EINEN SCHWINGSPULENMOTOR

Vibrating element

Voice coil motor control method, system and equipment

The invention discloses a voice coil motor control method, a voice coil motor control system and voice coil motor control equipment. The voice coil motor control method comprises the following steps: calculating a required incremental voltage value according to the speed deviation of a voice coil motor; obtaining a frequency conversion control parameter according to the incremental voltage value, and obtaining a control signal through the frequency conversion control parameter; and controlling the voice coil motor to rotate according to the control signal. According to the method, under the condition that the clock frequency and the control period of the controller are not changed, the adjustment resolution is reduced through frequency conversion control, so that higher control precision is guaranteed, and the high-precision constant-speed control level of the voice coil motor is improved.

Vibrating Element

This vibrating element includes a movable portion driven to vibrate at a prescribed resonance frequency, a driving portion vibrating the movable portion by cyclically supplying a pulse signal and a detecting portion detecting the vibrational state of the movable portion, while the driving portion is so formed as to supply the pulse signal at a first frequency substantially identical to the resonance frequency of the movable portion at least in starting and to cyclically supply the pulse signal at a second frequency smaller than the first frequency in detection of the vibrational state of the movable portion.

Camera Sensor Shift Flexure Arrangement

Various embodiments include a camera with image sensor shifting capabilities and a flexure arrangement. In various embodiments, the flexure arrangement may include an upper flexure and a lower flexure. The upper flexure may include a suspension wire that extends between two sheets. The lower flexure may include one or more flexure arms that connect a moveable platform to a stationary platform.

METHODS AND APPARATUS FOR DRIVER CALIBRATION

Driver circuits, systems for driving actuators, and imaging systems with actuators. The driver circuit includes a current comparator circuit, a driver, and a replica circuit. The current comparator circuit includes a first node having a first voltage. The current comparator circuit also includes a second node having a second voltage. The driver includes a first terminal responsive to the second voltage. The driver also includes a second terminal connected to a reference voltage. The replica circuit includes a third terminal connected to the first node. The replica circuit also includes a fourth terminal connected to the second terminal of the driver. The replica circuit also includes a fifth terminal connected to the first terminal of the driver.

Integriertes Antriebssystem für Pulsbreitenmodulation in Strombetriebsart

Fast focusing of the voice coil motor driving method

Driving control device for voice coil motor and method of using the same

The present invention relates to a driving control of a voice coil motor (hereinafter, referred to as "VCM') which moves lens of a camera module, more particularly to a driving control method for VCM capable of reducing the noise generated at the time of initial driving or landing of the lens and reducing the moving time thereof, and the method is characterized by and include the steps of: applying a linearly increasing current with a first slope to the VCM up to a pre-set first inflection point in response to a camera operation-on command; and moving the lens to an infinite position by applying a linearly increasing current with a second slope less steep than the first slope to the VCM from the first inflection point to the infinite position.

MOTOR CONTROL DEVICE

One form of a motor control device includes: a waveform generation unit and an amplifier that generate a drive voltage of a voice coil motor (VCM); a DC offset detection unit that detects a DC offset of the drive voltage; a stop control unit that stops application of the drive voltage to a motor coil when the detected DC offset exceeds an operation stop threshold; a temperature correction value setting unit that sets a temperature correction value corresponding to the DC offset when the detected DC offset is lower than the operation stop threshold; a thermistor that detects an ambient temperature; and a vibration level control unit that varies the drive voltage and controls an amplitude level based on the detected ambient temperature and the set temperature correction value.

Ausgangsstufe insbesondere für integrierte Verstärker mit aussen verbundenen Ausgangsleistungsvorrichtungen

Apparatus for driving voice coil motor

Method for VCM measuring a coil resistance of a motor and a device for driving VCM the same

Voice coil motor control method and mobile terminal

CAMERA MODULE AND DETECTING APPARATUS FOR VEHICLE COMPRISING SAME

A camera module according to an embodiment of the present invention includes a printed circuit board, an image sensor disposed on the printed circuit board, a lens assembly disposed on the image sensor, a housing for receiving the printed circuit board, the image sensor and the lens assembly. Both ends of the camera module are connected to a power input device via an electrode, and the camera module further includes metal yarn surrounding the outer surface of the housing. It is possible to provide a camera module with excellent efficiency. COPYRIGHT KIPO 2018 (500) Power input device ...

보이스 코일 모터

... 보이스 코일 모터는 양단이 개구된 통 형상으로 렌즈가 수납되며 하면에 마주하는 한 쌍의 보스들이 배치된 보빈 및 상기 보빈의 외주면에 권선된 코일을 포함하는 코일 블럭을 포함하는 가동자; 상기 코일 블럭과 마주하는 마그네트 및 상기 마그네트를 고정하는 요크를 포함하는 고정자; 및 한 쌍이 상기 보빈의 상기 하면을 따라 결합 되며 상호 절연된 탄성 부재들을 포함하며, 상기 탄성 부재들 사이에 대응하는 상기 보빈의 하면으로부터 돌출되어 상기 탄성 부재들의 마주하는 각 단부들을 누르는 융착부를 포함한다.

Voice coil motor driver and camera module having the same

A camera module having a voice coil motor driver, including a driving controller configured to compare a reference voltage and a negative feedback voltage to output a driving control signal, and a driver configured to drive a coil of the voice coil motor according to the driving control signal.

Methods and apparatus for driver calibration

Driver circuits, systems for driving actuators, and imaging systems with actuators. The driver circuit includes a current comparator circuit, a driver, and a replica circuit. The current comparator circuit includes a first node having a first voltage. The current comparator circuit also includes a second node having a second voltage. The driver includes a first terminal responsive to the second voltage. The driver also includes a second terminal connected to a reference voltage. The replica circuit includes a third terminal connected to the first node. The replica circuit also includes a fourth terminal connected to the second terminal of the driver. The replica circuit also includes a fifth terminal connected to the first terminal of the driver.

FAST REACTION SERVO DRIVE

Method for operating a converter device

VOICE COIL MOTOR

Integrated unit gain output stage

The operation of externally connected output power transistors of a class AB amplifier is controlled without employing any external sensing resistance of the output current by driving an externally connected power transistor through a level shifting buffer and employing a limiting network composed of an integrated transistor driven by the output of a signal amplifying stage and a resistance connected in series with its drain. The buffer stage shifts the level of the driving signal of the external power transistor by a value equal to the threshold voltage of the integrated transistor of the limiting network thus ensuring the turn-off of the external power transistor under quiescent conditions.

ADJUSTABLE CIRCUIT FOR PERSONAL ELECTRIC CLEANING CARE APPLIANCE

An adjustable circuit for a personal electric cleaning care appliance comprises comprising a power supply portion and a driver is disclosed. The driver comprises a transducer, a drive coil and an iron core of the drive coil, and a drive shaft of the transducer is equipped with cleaning elements. The adjustable circuit comprises a microchip processor and an H-bridge drive circuit. By connecting a capacitor bank and the drive coil in series at load ends of the H-bridge drive circuit, at least a part of the capacitors of the capacitor bank is controllably connected in series with the drive coil or disconnected from the drive coil, the capacitance of the connected capacitor can be controlled so that the current flowing through the drive coil is controllably limited to a certain value, thereby, the motion amplitude of the cleaning elements can be controlled, and no additional electromagnetic interference will occur. 2. (canceled)3. The adjustable circuit for a personal electric cleaning care appliance according to claim 1 , wherein the equivalent capacitance value of the capacitor bank is selected so that a loop resistance of the drive coil and the capacitor bank is purely resistive.45.-. (canceled)6. The adjustable circuit for a personal electric cleaning care appliance according to claim 1 , wherein the capacitor bank comprises at least two capacitors (C claim 1 , C claim 1 , . . . C) connected in parallel with each other.79.-. (canceled) The present invention relates to an adjustable circuit for a personal electric cleaning care appliance, and more specifically, to a circuit with adjustable electrical efficiency and amplitude for a personal electric cleaning care appliance.In a personal electric cleaning care appliance (hereinafter referred as cleaning care appliance), a resonance oscillation driving system is frequently used to drive the cleaning care appliance for a rotary motion. As described in the applicant's another patent application PCT/CN2015/071696, the ...

ADAPTIVE MODEL FEEDBACK FOR HAPTIC CONTROLLERS

Disclosed embodiments include an apparatus for closed loop control of a linear resonant actuator comprising a motor drive circuit configured to provide a motor drive signal, a current and voltage sensing circuit coupled to the output terminal of the motor drive circuit and across the motor, and having current sense and a voltage sense outputs. A resonant frequency and back emf extraction circuit receives the current sense and voltage sense outputs, and outputs a resonant frequency signal output and a measured back emf signal output. An actuator model circuit has inputs coupled to the output of the motor drive circuit, the resonant frequency signal output, and a mechanical system quality factor signal generated by an adaptation circuit having an input coupled to the error summing circuit output. The error summing circuit has inputs coupled to the output of the actuator model and the measured back emf signal.

A voice coil motor of the closed-loop feedback device, voice coil motor and the camera module

Voice coil motor drive circuit

APPARATUS FOR CONTROLLING OPERATION OF VOICE COIL MOTOR AND METHOD THEREOF

The voice coil motor and driving method thereof

CLOSED LOOP CONTROL IN A CAMERA MODULE

A system may include an output stage for driving a load at an output of the output stage, a pulse-width modulation mode path configured to pre-drive the output stage in a first mode of operation, a linear mode path configured to pre-drive the output stage in a second mode of operation and a loop filter coupled at its input to the output of the output stage and coupled at its output to both of the pulse-width modulation mode path and the linear mode path. The pulse-width modulation mode path and the linear mode path may be configured such that a first transfer function between the output of the loop filter and the output of the output stage is substantially equivalent to a second transfer function between the output of the loop filter and the output of the output stage.

Feedback control system and method

The present disclosure provides a feedback control system and method for a bidirectional VCM. The system employs an analog core that is common to both the PWM and linear modes of operation. The analog core includes a feedback mechanism that determines the error in the current flowing through the motor. The feedback mechanism produces an error voltage that corresponds to the current error, and applies the voltage to a control driver. The control driver then controls the motor, based on the error voltage, in either a PWM or linear mode. By sharing a common core, the switching time between modes is improved. Furthermore, the output current error between modes is reduced.

VIBRATION DEVICE

A vibration device includes a voice coil type actuator that applies vibration to a human body, and a control unit that outputs a control signal, which is a composite wave obtained by combining plural sine waves having different frequencies so as to vibrate the voice coil type actuator in a vibration direction and in which a difference between frequencies of the plural sine waves is a specific frequency, to the voice coil type actuator.

Motor drive semiconductor integrated circuit and magnetic disk storage apparatus

The invention provides a motor drive semiconductor integrated circuit for driving and controlling a voice coil motor that can conduct a seek operation, a track follow operation and a settling operation through PWM control, has desired control accuracy and can be produced by a CMOS process. In a voice coil motor drive circuit for executing positioning control of a magnetic head by feedback-controlling a driving current of a voice coil motor for moving a magnetic head over a magnetic disk for reading information from a storage track on the magnetic disk driven for rotation while a read state of the magnetic head is being monitored, head movement control such as a seek operation, a track follow operation etc, of the magnetic head is executed by PWM driving on the basis of a command value from a controller.

OPERATION DEVICE AND VIBRATION GENERATING DEVICE

An operation device includes a movable portion, a vibration generating unit, a fixed portion, a detecting unit, and a control unit. The vibration generating unit includes a movable yoke attached to the movable portion, and a fixed yoke attached to the fixed portion and disposed facing the movable yoke in a first direction. The vibration generating unit includes a permanent magnet attached to one yoke among the movable yoke and the fixed yoke, both ends of the permanent magnet in the first direction being opposite magnetic poles created by magnetization. The vibration generating unit includes an exciting coil attached to a different yoke from the one yoke among the movable yoke and the fixed yoke, the exciting coil being configured to induce magnetic flux in response to a current flowing through the exciting coil.

SERVO CONTROLLER BLENDING

A method includes generating a first control signal and a second control signal; blending the first control signal and the second control signal based, at least in part, on a velocity; and positioning a read/write head based on the blending of the first control signal and the second control signal.

Linear resonant actuator as a tap, touch and pressure sensor using back EMF

The present disclosure provides systems and methods for using a linear resonant actuator (“LRA”) to determine a type of contact between a device and its surroundings. The LRA may be coupled to an amplifier by one or more switches. The audio amplifier may receive a signal from a microcontroller and transmit the signal the LRA when the switches are closed. When the switches are in an open position, the LRA may be actively sensing for the type of contact. The back EMF may be measured when the switches are open. The measured back EMF waveform may be used to determine the type of contact. When the signal is not being transmitted, the LRA may be passively sensing to determine whether the device was tapped.

Adaptive model feedback for haptic controllers

Disclosed embodiments include an apparatus for closed loop control of a linear resonant actuator comprising a motor drive circuit configured to provide a motor drive signal, a current and voltage sensing circuit coupled to the output terminal of the motor drive circuit and across the motor, and having current sense and a voltage sense outputs. A resonant frequency and back emf extraction circuit receives the current sense and voltage sense outputs, and outputs a resonant frequency signal output and a measured back emf signal output. An actuator model circuit has inputs coupled to the output of the motor drive circuit, the resonant frequency signal output, and a mechanical system quality factor signal generated by an adaptation circuit having an input coupled to the error summing circuit output. The error summing circuit has inputs coupled to the output of the actuator model and the measured back emf signal.

VOICE COIL MOTOR AND DRIVING METHOD THEREOF

A voice coil motor (VCM) is disclosed, the VCM including: a stator including a magnet generating a first electromagnetic field; a mover including a bobbin formed with a hollow hole through which light passes and a coil formed on a periphery of the bobbin that generates a second electromagnetic field responsive to the first electromagnetic field; a base fixed at the stator and formed with an opening through which the light passes; and at least one elastic member elastically supporting the bobbin and forming a gap between the bobbin and the base when the coil is not applied with a current.

DIRECT CURRENT MOTOR WITHOUT COLLECTOR

Voice coil motor control method and system and controller

Closed loop control in a camera module

A system may include an output stage for driving a load at an output of the output stage, a pulse-width modulation mode path configured to pre-drive the output stage in a first mode of operation, a linear mode path configured to pre-drive the output stage in a second mode of operation and a loop filter coupled at its input to the output of the output stage and coupled at its output to both of the pulse-width modulation mode path and the linear mode path. The pulse-width modulation mode path and the linear mode path may be configured such that a first transfer function between the output of the loop filter and the output of the output stage is substantially equivalent to a second transfer function between the output of the loop filter and the output of the output stage.

Closed loop control in a camera module

DRIVE CONTROL CIRCUITRY FOR ELECTRICAL MOTORS

... 1485563 Automatic positioning control FUJITSU Ltd 24 Dec 1974 [28 Dec 1973] 55753/74 Heading 63N A magnetic head in a magnetic disc pack store is positioned by an electric actuator whose movement is controlled by a control system including means for providing an actual speed of movement signal and an actual position signal from which is derived a first desired speed signal and a second greater desired speed signal. The actuator energization is controlled in accordance with a comparison of the actual position signal with the first reference signal when it is smaller than the first reference and with the second reference signal when it is greater than the first reference the speed of the actuator being increased when the actual speed signal is smaller than the first reference signal. In the overall system, Figure 5, a function generator 4 responds to an instruction from the central processor CPU and to the fed back position signal from detector 2 to provide a speed reference signal to summation ...

Direct current motor without collector

Such direct current motor without collector is intended to operate in the four quadrants and is provided with an output exceeding .5 kilowatt; it comprises stator windings which may be connected to a direct current source, according to the position of the rotor, through a switching device formed by a bridge circuit comprising controlled semiconductor gates. An additional semiconductor gate is arranged in each of the two lines connecting the direct current source to the bridge circuit, whereas zero diodes, allocated to the semiconductor gates of the bridge circuit, are connected directly to the direct current source, avoiding the semiconductor gates arranged in the lines connecting the direct current source to the bridge circuit. This motor is characterized by a combination of thyristors (Thu, Thu, Thu, Thu, Thu, Thu) forming semiconductor gates of the bridge circuit (Br) of the switching device (K) and of transistors (Tu, Tu) forming the semiconductor ...

The voice coil motor and speaker controller

Camera actuator for lens and sensor shifting

Some embodiments include a camera voice coil motor (VCM) actuator configured to shift a lens and/or an image sensor along multiple axes. The VCM actuator may include a bottom flexure and a top flexure that connect one or more dynamic members to one or more static members. The VCM actuator may include stationary magnets and coils held by dynamic members. In some cases, the VCM actuator may be configured to move the image sensor along an optical axis, to move the image sensor in directions orthogonal to the optical axis, and/or to tilt the image sensor relative to the orthogonal axis. In some examples, the VCM actuator may be configured to move the image sensor in directions orthogonal to the optical axis, to move the lens along the optical axis, and/or to tilt the lens relative to the optical axis.

Gleichstromlinearmotor mit integriertem Wegmeßsystem

Input signal shaping method of voice coil motor, driving circuit and driving method thereof

A voice coil motor driving method

DRIVING APPARATUS OF VOICE COIL MOTOR

The present invention relates to a driving apparatus of a voice coil motor capable of precisely controlling the voice coil motor while reducing the size of an actuator of a camera module. The driving apparatus of a voice coil motor according to an embodiment of the present invention comprises: a signal generation part generating a path signal for determining a path of a driving current provided to a voice coil motor and a current signal for determining a level of the driving current; a control part generating a control signal by comparing a reference current of which a level is determined according to the current signal and a driving current flowing through the voice coil motor; and a plurality of transistors connected to the voice coil motor, wherein the plurality of transistors may include a driving circuit part which performs a switching operation in accordance with the path signal and the control signal to form the path. COPYRIGHT KIPO 2019 ...

MOTOR DRIVING APPARATUS AND CAMERA MODULE HAVING SAME

The present invention relates to a motor driving apparatus and a camera module which do not use resistance when detecting a motor driving current. According to one embodiment of the present invention, the motor driving apparatus comprises: a motor driving unit supplying a driving current to a motor to drive the same; a current mirror unit mirroring the driving current; a detection unit equalizing a first voltage based on the driving current and a second voltage based on the mirroring current flowing through the current mirror unit to output a detection current corresponding to the mirroring current; and a current comparison unit controlling motor driving of the motor driving unit by comparing the detection current from the detection unit and a reference current based on an inputted control signal. COPYRIGHT KIPO 2017 (111) Motor driving unit (112) Current mirror unit (113) Detection unit (114) Current comparing part (AA) Control signal (BB) Detection current ...

DRIVING DEVICE FOR MULTI-AXIS COMMON-MODE VOICE COIL MOTOR

The voice coil motor of the shaping signal and drive control method, the driving chip circuit

MOTOR CONTROLLER

A motor controller used for driving a motor is provided. The motor includes a motor coil and a maximum rated current. The motor controller comprises a driving circuit, a control unit, a digital-to-analog converter, an operational amplifier, a switch circuit, and a resistor. When it is needed to decrease a settling time for the motor to reach a target position, or a vibration is detected within a camera module so as to enable an image stabilization mechanism, it is capable of temporarily supplying a driving current greater than the maximum rated current to the motor coil.

Camera actuator assembly with sensor shift flexure arrangement

Various embodiments include a camera with image sensor shifting capabilities and a flexure arrangement. In various embodiments, the flexure arrangement may include an upper flexure and a lower flexure. The upper flexure may include a suspension wire that extends between two sheets. The lower flexure may include one or more flexure arms that connect a moveable platform to a stationary platform.

OPERATION DEVICE AND VIBRATION GENERATING DEVICE

Voice coil motor motion control method based on disturbance estimation and related equipment

Voice coil motor driver driving current segmentation control circuit

VOICE COIL ACTUATOR DRIVING DEVICE OF CAMERA AND DRIVING METHOD THEREOF

Disclosed are a voice coil actuator driving device of a camera and a driving method thereof. The voice coil actuator driving device performs an input shaping based on a resonant frequency of a voice coil actuator and an attenuation of a vibration generated in the voice coil actuator to generate a control signal from an original control signal by using a shaping signal as an initial input, and drives the voice coil actuator according to the control signal on which the input shaping is performed. The shaping signal is for controlling a resonance of the voice coil actuator and can be a multi-step or toggle type pure shaping signal on which the attenuation is applied and which has a decreasing signal variation, or a convolution shaping signal which is obtained by convolving the pure shaping signals. According to the present invention, residual vibration suppression performance and auto-focusing performance of the voice coil actuator can be further improved by using an input shaping control ...

Motor control circuitry for multiple-actuator support

An apparatus comprises a plurality of servo controllers and a plurality of motor control circuits. Each of the plurality of motor control circuits has a primary serial interface (SIF) coupled to one of the plurality of servo controllers and at least one secondary SIF coupled to others of the plurality of servo controllers. Each of a plurality of independently controllable actuators is coupled to one of the motor control circuits. Each of the plurality of motor control circuits is configured to generate a compensated control signal using an actuator command received from the primary SIF and an actuator command received from the at least one secondary SIF. Each of the plurality of motor control circuits is configured to control movement of one of the plurality of actuators using the compensated control signal.

Commutatorless DC motor - has thyristor bridge supplying stator winding from DC source according to rotor position

The motor is for a fur-quadrant operation and a power greater than 0.5 kW. Stator windings are connected to a DC voltage source through a switch consisting of a bridge circuit with controllable SC gates, in accordance with the rotor position. A further sC gate is provided in each connection between the DC sources and the bridge. Null diodes are allocated to the SC gates in the bridge, and connected directly to the current source, by-passing the gates in the connections. Six thyristors are used in theswitch bridge circuit and two transistors in the connections to the bridge. They control the current by pulse-width modulation.

NC machine tool fast reacting servo drive - uses phase signals corresp. to rotary angle of sync. machine to control current

The fast reacting servo drive for e.g. a numerically controlled machine tool, uses a converter self controlled synchronous machine (1) and an angle indicator (4) which provides signals corresponding to the angle of rotation of the rotor (2). Phase signals (11) corresponding to the angle of rotation are fed to multipliers (10) for each phase, and their outputs (12) fed to equalisers (13) and current controllers (18) to the stator windings (16). A tachogenerator (5) connected to the angle indicator is followed by an equaliser (6) and a rotary speed controlled (9) interconnected with the multipliers.

VOICE COIL MOTOR

보이스 코일 모터

... 보이스 코일 모터는 양단이 개구된 통 형상으로 렌즈가 수납되며 하면에 마주하는 한 쌍의 보스들이 배치된 보빈 및 상기 보빈의 외주면에 권선된 코일을 포함하는 코일 블럭을 포함하는 가동자; 상기 코일 블럭과 마주하는 마그네트 및 상기 마그네트를 고정하는 요크를 포함하는 고정자; 및 한 쌍이 상기 보빈의 상기 하면을 따라 결합 되며 상호 절연된 탄성 부재들을 포함하며, 상기 탄성 부재들 사이에 대응하는 상기 보빈의 하면으로부터 돌출되어 상기 탄성 부재들의 마주하는 각 단부들을 누르는 융착부를 포함한다.

Control method and system of electromagnetic floating device and application of control method

Feedback control system and method

A kind of input displacement driving device and control method thereof

Rapid identification method for galvanometer of bandwidth galvanometer motor

The invention relates to a method for rapidly identifying a galvanometer of a bandwidth galvanometer motor. The method comprises the following steps: step 1, establishing a common galvanometer database; 2, according to the marking speed in the collected galvanometer information, the marking speed is set as a galvanometer prediction step length p, and each galvanometer corresponds to one prediction step length p; according to the rapid identification method for the galvanometer of the bandwidth galvanometer motor, transformation from variables to vectors is more suitable for solving modeling under the condition of multiple input and output variables, a state space model can describe the state of a system in the form of current and past minimum information, a large amount of historical data information is not needed, time and labor are saved, and the identification efficiency is improved. A feed-forward and PID software module adopts proportion, integration, differential and feed-forward ...

VOICE COIL MOTOR

구동 장치

... [해결 수단] 각각이 자장을 발생시켜서, 제1 렌즈 및 제1 자석이 마련된 제1 대상물을 광축 방향으로 구동시키는 제1 복수의 구동부를 갖는 제1 구동부군과, 각각이 자장을 발생시켜서, 제2 렌즈 및 제2 자석이 마련된 제2 대상물을 상기 광축 방향으로 구동시키는 제2 복수의 구동부를 갖는 제2 구동부군을 구비하고, 상기 제1 복수의 구동부 및 상기 제2 복수의 구동부 각각은, 클럭 신호선 및 데이터 신호선을 통하여, 자신을 슬레이브로서 제어하는 마스터와 접속되는 제1 단자 및 제2 단자를 갖고, 상기 제1 복수의 구동부에 있어서의 적어도 하나의 구동부는, 상기 제1 단자가 상기 클럭 신호선에, 상기 제2 단자가 상기 데이터 신호선에 순접속되고, 상기 제2 복수의 구동부에 있어서의 적어도 하나의 구동부는, 상기 제2 단자가 상기 클럭 신호선에, 상기 제1 단자가 상기 데이터 신호선에 역접속되는, 구동 장치를 제공한다.

Drive system for information recording/reproducing apparatus

A drive system for an information recording/reproducing apparatus having a recording head to record and reproduce information on and from an information recording disc, the drive system being equipped with a spindle motor for rotating the information recording disc and a voice coil motor for moving the recording head to a target track of said recording disc. These motors are arranged to be driven through motor drivers. Also included in the system is a power supply monitoring device for monitoring a power supply voltage coupled to the spindle motor driver and the voice coil motor driver to output a signal corresponding to the monitored power supply voltage. This output signal of the monitoring device is supplied to a control section which controls voltages of the spindle motor driver and the voice coil motor driver in accordance with the output signal of the monitoring device. This arrangement allows the drive system to be operated with a relatively low voltage.

Ausgangsstufe insbesondere für integrierte Verstärker mit aussen verbundenen Ausgangsleistungsvorrichtungen

Verfahren zum Betrieb einer Stromrichteranordnung

Positionierung-Servogerät.

Driving circuit of voice coil motor

Method of position motion control for voice coil motor

Disk apparatus and disk access method employing counterelectromotive voltage from second voice coil motor to control first voice coil motor

A disk apparatus according to the present invention includes a rotating means for rotating a disk, a head for accessing the disk, and a head moving means of moving the head in the radius direction of the disk. The head moving means includes a first voice coil motor as a drive source used when the head is moved, a second voice coil motor as a drive source used when the head is moved, a head guide means for guiding the head in the radius direction of the disk when the head is moved, a drive means for supplying a drive signal to the first voice coil motor during a first period in which the head is moved to a predetermined position on the disk and for supplying the drive signal to the first voice coil motor and the second voice coil motor during a second period in which the head is moved from the predetermined position on the disk to another position thereon, and a counterelectromotive voltage detecting means for detecting a counterelectromotive voltage from the second voice coil motor when ...

REAKTIONSSCHNELLER SERVOANTRIEB

VOICE COIL MOTOR

Method for controlling and regulating a synchronous machine which is supplied from a converter

The control and regulation of a synchronous machine by means of thyristor invertors, the rotor rotation angle being measured, and a required rotation speed being compared with the actual rotation speed, is intended to be effected such that the tendency of the state variables to oscillate is overcome while the torque emitted by the machine corresponds with the required value. This is achieved in that the rotor angular displacement is effected as a function of the real current and reactive current, in that these values are additionally supplied to the drive unit (triggering equipment) for the thyristors, a power source supplying the invertor, with a capacitor connected in parallel with it whose nominal voltage value is adjusted over a characteristic as a function of the required rotation speed. ...

Semiconductor integrated circuit and operating method thereof

VOICE COIL ELECTRIC MOTOR CONTROL METHOD AND SYSTEM, AND CONTROLLER

A voice coil electric motor (30) control method and system, and a controller (10). The voice coil electric motor (30) is electrically connected to a drive circuit (20) and is mechanically connected to a displacement sensor (40), and the drive circuit (20) and the displacement sensor (40) are both electrically connected to the controller (10). By means of using a digital signal to perform closed-loop control on a voice coil electric motor (30), interference from electromagnetic reflection and mechanical vibration of the voice coil electric motor (30) can be avoided, such that the reliability is high and a peripheral circuit is simple.

Method and control system for driving a brushless electric motor

In a method and control system for controlling a brushless, electronically commutated electric motor (M), a three-phase source AC voltage (U N ) is rectified and fed to a DC link voltage (U ZK ), which is supplied to an inverter ( 2 ) via a slim DC link circuit ( 6 ). A motor control unit ( 10 ) for PWM pulsing controls the inverter for commutating the electric motor (M) and adjusting the motor speed with a variable duty cycle (A). The duty cycle (A) is influenced by a compensating factor (k) such that the product of the DC link voltage (U ZK ) and a resulting DC link current (I ZK ) is kept constant in the link circuit ( 6 ). The DC link voltage (U ZK ) is monitored. When a first threshold value (U ZKac.max1 ) of an AC component (U ZKac ) is exceeded, the compensating factor (k) is modified to lower the current AC component (U ZKac ) below the threshold value (U ZKac.max1 ).

Driving circuit and method for voice coil motor with spring return

A driving circuit drives a voice coil motor having a spring return mechanism. A driving current generating unit supplies, to a coil of the voice coil motor, a driving current that corresponds to an analog control signal. Waveform memory stores digital waveform data which indicates the time waveform of a driving current to be supplied to the voice coil motor. A predetermined frequency component is removed from the frequency components of the waveform data. A control unit reads out the waveform data from the waveform memory at a rate that corresponds to the resonance frequency of the voice coil motor, and outputs the waveform data thus read out as a digital code. A D/A converter converts a digital code into an analog control signal, and outputs the analog control signal to the driving current generating unit.

Driver having dead-time compensation function

Proposed is a driver having dead-time compensation function. The driver having dead-time compensation function generates an output voltage according to a voltage command and a frequency command. The driver includes an inverter, an output current detector and a control unit. The inverter receives a DC voltage and operates with a pulse width modulation mode so that the driver outputs the output voltage and an output current. The output current detector detects the current value of the output current to generate a output current detecting signal. The control unit outputs a switching control signal to inverter according to the voltage command and the frequency command. The control unit corrects a reference command according to dead-time and the output current detecting signal related to the output current so that amplitude and waveform smoothness of the output voltage and the output current are compensated.

PWM OUTPUT APPARATUS AND MOTOR DRIVING APPARATUS

A PWM output apparatus includes a calculating circuit configured to calculate an output width of a PWM output signal of a first signal and a second signal, which have phases different from each other, based on a command value of a PWM output. A comparing circuit compares the output width and a reference period which is set longer than a predetermined dead time period. A PWM output signal generating circuit outputs the PWM output signal to a dead time inserting block as a corrected PWM output signal, when a set/clear signal generating circuit outputs the set signal, and carries out a correction of setting the first signal of the PWM output signal to be inactive to output to the dead time inserting block as the corrected PWM output signal, when the set/clear circuit outputs the clear signal. The dead time inserting block corrects the corrected PWM output signal. 1. A PWM (Pulse Width Modulation) output apparatus comprising:a calculating circuit configured to calculate an output width of a PWM output signal of a first signal and a second signal, which have phases different from each other, based on a command value of a PWM output;a comparing circuit configured to compare the output width and a reference period which is set longer than a predetermined dead time period;a set/clear signal generating circuit configured to output a clear signal when the output width is shorter than the reference period, and output a set signal when the output width is longer than the reference period;a PWM output signal generating circuit configured to output the PWM output signal to a dead time inserting block as a corrected PWM output signal, when said set/clear signal generating circuit outputs the set signal, and carry out a correction of setting the first signal of the PWM output signal to be inactive to output to said dead time inserting block as the corrected PWM output signal, when said set/clear circuit outputs the clear signal; andsaid dead time inserting block configured to ...

Voice coil motor and driving mehod thereof

A VCM is disclosed, the VCM including a stator including a first driving unit fixed to a base to generate a first magnetic field, a rotor including a bobbin mounted with a lens to vertically move relative to the base and a second driving unit generating a second magnetic field reacting to the first magnetic field, an elastic member connected to the stator and the rotor to elastically support the rotor, and a position sensor arranged to any one of the first and second driving units to sense a position of the rotor relative to the stator.

CIRCUIT FOR FILTERING NARROW PULSE AND COMPENSATING WIDE PULSE, AND MOTOR CONTROLLER COMPRISING THE CIRCUIT

A circuit for filtering narrow pulse and compensating wide pulse, including a signal shaping circuit, a filter circuit, and a pulse width compensating circuit. The signal shaping circuit processes an input signal and transmits the input signal to the filter circuit. The filter circuit filters off narrow pulses of the input signal. The pulse width compensating circuit compensates the wide pulses of the input signal and outputs an output signal. 22. The circuit of claim 1 , wherein the filter circuit () is an RC filter circuit.311. The circuit of claim 1 , wherein the signal shaping circuit () comprises a first Schmitt trigger (ICA).411. The circuit of claim 2 , wherein the signal shaping circuit () comprises a first Schmitt trigger (ICA).5. The circuit of claim 3 , wherein{'b': 3', '1', '1', '3', '4', '2, 'the pulse width compensating circuit () comprises a second Schmitt trigger (ICB), a triode (Q), a first resistor (R), a second resistor (R), and a capacitor (C);'}{'b': 2', '1, 'the input signal processed through the filter circuit () is connected with the second Schmitt trigger (ICB);'}{'b': '1', 'the signal is output from an output end of the second Schmitt trigger (ICB);'}{'b': 2', '4', '1, 'the capacitor (C) and the second resistor (R) are connected in series and connected to the output end and a grounded end of the Second Schmitt trigger (ICB), respectively;'}{'b': 2', '4', '1', '3, 'a node between the capacitor (C) and the second resistor R is connected with a base electrode of the triode (Q) after being connected with the first resistor (R);'}{'b': '1', 'an emitting electrode of the triode (Q) is grounded; and'}{'b': 1', '1, 'a collecting electrode of the triode (Q) is connected with an input end of the Second Schmitt trigger (ICB).'}6. The circuit of claim 4 , wherein{'b': 3', '1', '1', '3', '4', '2, 'the pulse width compensating circuit () comprises a second Schmitt trigger (ICB), a triode (Q), a first resistor (R), a second resistor (R), and a capacitor ( ...

Voice coil motor and driving method thereof

A voice coil motor (VCM) is disclosed, the VCM including: a stator including a magnet generating a first electromagnetic field; a mover including a bobbin formed with a hollow hole through which light passes and a coil formed on a periphery of the bobbin that generates a second electromagnetic field responsive to the first electromagnetic field; a base fixed at the stator and formed with an opening through which the light passes; and at least one elastic member elastically supporting the bobbin and forming a gap between the bobbin and the base when the coil is not applied with a current.

MOTOR DRIVE CIRCUIT

A motor drive circuit that performs PWM driving of an AC motor includes: rectifying circuit that rectifies power from an AC power supply; a DC intermediate circuit that smoothes an output of the rectifying circuit and holds the smoothed output; an inverter circuit that executes a PWM control of a voltage applied to the AC motor based on DC power held in the DC intermediate circuit; and a filter circuit that is inserted between the AC power supply and the rectifying circuit, wherein the filter circuit includes a noise filter that is inserted between the AC power supply and the rectifying circuit and reduces harmonic noise, and a band elimination filter that is arranged at a posterior stage of the noise filter and reduces harmonic noise having a bandwidth, which can be generated by the PWM control. 1. A motor drive circuit that performs PWM driving of an AC motor , the motor drive circuit comprising:a rectifying circuit that rectifies power from an AC power supply;a DC intermediate circuit that smoothes an output of the rectifying circuit and holds the smoothed output;an inverter circuit that executes a PWM control of a voltage applied to the AC motor based on DC power held in the DC intermediate circuit; anda filter circuit that is inserted between the AC power supply and the rectifying circuit, whereinthe filter circuit includesa noise filter that is inserted between the AC power supply and the rectifying circuit and reduces harmonic noise that can be generated regardless of whether the PWM control is executed, anda band elimination filter that is arranged at a posterior stage of the noise filter and reduces harmonic noise having a bandwidth, which can be generated by the PWM control, and whereinthe band elimination filter is configured to includea plurality of capacitors, one end of each being connected to each of phase power-supply lines connecting the AC power supply and the rectifying circuit, and the other ends being connected to each other, anda series- ...

CONTROLLER FOR MULTI-PHASE ROTARY DEVICE

A controller includes: an inverter having switching devices for converting by a PWM method and supplying an electric power to a multi-phase rotary device; a duty calculator calculating a duty command value with To; a pseudo duty calculator calculating a N-th update duty value based on N-th and (N−1)-th duty command values according to a ratio of To/Tr with a linear compensation method; a comparator comparing the update duty value with a carrier wave to generate an on-off signal of each switching device; and a detector detecting current of each phase with To. The duty calculator changes an average voltage of each phase to make an on-state time of a detection side switching device equal to or longer than minimum. When the on-state time at one phase is smaller than minimum, the pseudo duty calculator outputs a pseudo duty value to detect the current of other phases. 1. A controller for a multi-phase rotary device comprising:an electric power inverter for converting an electric power of a direct current power source by a pulse width modulation control method and for supplying a converted electric power to the multi-phase rotary device, the electric power inverter including a plurality of switching devices, which have a high voltage side switching device and a low voltage side switching device connected to each other in a bridge connection manner;a control calculation device including: a duty command device for calculating a duty command value, which relates to the pulse width modulation control method, with a predetermined calculation period; and a pseudo duty calculation device for calculating a update duty value based on the duty command value with an update period, which has a frequency M times larger than the calculation period, the M indicative of an integer equal to or larger than two, the control calculation device outputting the update duty value corresponding to a command voltage of the multi-phase rotary device;a carrier wave comparison device for comparing ...

Fail-Safe Interface

Circuits arranged to produce first and second outputs produced by first and second switch-mode converters, respectively, wherein each switch-mode converter comprises a converter input, a converter output, a converter controller, a converter controller enable input arranged to provide power to the controller, and a semiconductor power switching device coupled between the converter input and the converter controller. A first output of the first converter and a second output of the second converter are each arranged to produce a voltage of higher magnitude than the voltage at the respective converter controller enable input and converter input when the converter controller is enabled. Methods of controlling first and second outputs from first and second switch-mode converters are also disclosed. 1. A circuit arranged to produce first and second outputs , the outputs being produced by first and second switch-mode converters respectively , wherein each switch-mode converter comprises:a converter input;a converter output;a converter controller;a converter controller enable input arranged to provide power to the controller;a semiconductor power switching device coupled between the converter input and the converter controller;wherein a first output of the first converter and a second output of the second converter are each arranged to produce a voltage of higher magnitude than the voltage at the respective converter controller enable input and converter input when the converter controller is enabled.2. The circuit according to wherein the converter controller enable input is arranged to provide power to the converter input.3. The circuit according to wherein each converter controller is arranged to switch the respective semiconductor power switching device so as to provide the respective first or second voltage output.4. The circuit according to wherein at least one isolator device is arranged to produce an output when coupled between the first voltage output and the first ...

Power Inverter

There is provided a power inverter that fixes a connector in which a DC-side connector and an AC-side connector are mechanically combined to a casing in which a power semiconductor module converting a DC current into an AC current is housed, a positive-side DC terminal and a negative-side DC terminal are arranged to be aligned along one side, which is formed in the widthwise direction, of one side face of the casing, and a U-phase side terminal, a V-phase side terminal, and a W-phase side terminal are arranged to be aligned along one side, which is formed in the longitudinal direction, of one side face of the casing. 1. A power inverter that fixes a connector , in which a DC-side connector and an AC-side connector are mechanically combined , to a casing , the power inverter comprising:a power semiconductor module that converts a DC current into an AC current;a DC terminal that delivers the DC current to the power semiconductor module;an AC terminal that delivers the AC current to an electrical motor; andthe casing that houses the power semiconductor module, whereinthe DC terminal and the AC terminal are arranged on one side face of the casing,the one side face of the casing forms a rectangular shape that is configured by a side formed in a widthwise direction and a side formed in a longitudinal direction,the DC terminal is configured by a positive-side DC terminal and a negative-side DC terminal,the AC terminal is configured by a U-phase side terminal, a V-phase side terminal, and a W-phase side terminal,the positive-side DC terminal and the negative-side DC terminal are arranged to be aligned along one side, which is formed in the widthwise direction, of the one side face of the casing, andthe U-phase side terminal, the V-phase side terminal, and the W-phase side terminal are arranged to be aligned along one side, which is formed in the longitudinal direction, of the one side face of the casing.2. The power inverter according to claim 1 , wherein one of the U-phase ...

Electrically-augmented damping

Provided herein are devices, systems, and methods for electrically-augmented damping of an actuator and associated devices. In particular, electrically-augmented damping derived from measurement of voltage across an actuator and current flowing through an actuator is provided.

Control Circuit with Frequency Hopping for Permanent Magnet Motor Control

A control circuit of a motor is provided. The control circuit includes a pulse width modulation circuit, a microcontroller, a timer and an analog-to-digital converter. The PWM circuit generates at least one switching signal coupled to drive the motor. The microcontroller having a memory circuit is coupled to control a switching frequency and a pulse with of the at least one switching signal. The switching frequency of said at least one switching signal is modulated in a frequency hopping manner for reducing an EMI. The pulse width of the at least one switching signal is modulated in response to the frequency hopping manner for keeping an average switching current of the motor as an approximate constant. The timer controlled by the microcontroller determines the switching frequency of the at least one switching signal. The analog-to-digital converter is coupled to detect an input voltage of the motor for the microcontroller.

Motor control device

A motor control device includes an H-bridge circuit for controlling on/off of a current fed to a motor, a drive circuit for driving the H-bridge circuit, a drive command signal generator for generating a drive command signal including a pulse signal having a predetermined drive frequency for sending a command to drive the motor, a current detection circuit that includes a current detection resistor and a comparator connected in series with the motor and outputs a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal, a latch circuit for holding a current detection result based on an ON signal of the drive command signal and the comparison output signal, and a gate circuit for driving the drive circuit based on the ON signal of the drive command signal and a latch output signal from the latch circuit.

Three Phase Motor Control with Variable RPM and Variable Synchronized PWM

The three phase motor control with variable RPM and variable synchronized PWM is a new concept or method to drive a DC/AC invertor is a triggering pulse revolving circuit having a variable speed of revolving output triggering pulses to rotate commutating and duty cycling circuits to enable/disable power mosfets and to rotate current directions in three phase induction motor stator coils. The RPM control and PWM control are simplified using this method. All interconnections between circuits are conventional, not traditional.

Method of controlling a brushless permanent magnet motor

A method of controlling a brushless permanent magnet motor includes determining a motor operating target. The method includes comparing the motor operating target to a set of pre-determined excitation timing parameter relationships. The method includes operating the motor in accordance with an excitation timing parameter relationship determined from the set of pre-determined excitation timing parameter relationships to provide a motor operating response close to the motor operating target. The method includes measuring a measured motor operating response, comparing the measured motor operating response to the motor operating target, and applying a correction factor to an excitation timing parameter of the motor when the measured motor operating response does not match the motor operating target, such that the measured motor operating response moves toward the motor operating target.

POWER CONVERSION DEVICE AND POWER CONVERSION CONTROL METHOD

Provided is a power converter capable of reliably turning OFF a switching element before turn-OFF of a diode even with a fluctuation in rpm so as not to generate a backflow of a current. The power converter includes a diode ON-interval monitoring unit () configured to measure a change rate of a diode ON detection interval signal. When a diode ON detection interval change rate signal (S) exhibits a decrease on a negative side and is smaller than a predetermined value (an absolute value thereof exceeds a predetermined value), an OFF-timing of the switching element is advanced by a predetermined value or larger, to thereby reliably turn OFF the switching element before the turn-OFF of the diode even with the fluctuation in rpm. 15-. (canceled)6. A power converter , comprising: 2N switching elements for N phases, where N is an integer equal to or larger than 2, the 2N switching elements being provided for each of a higher arm and a lower arm; and', '2N freewheeling diodes respectively connected in parallel to the 2N switching elements; and, 'a power converting unit comprising a diode conducting state detecting unit configured to detect ON timings and OFF timings of the 2N freewheeling diodes from voltages of portions of the power converting unit;', 'a synchronized signal generating and monitoring unit configured to generate an ON synchronized signal being subjected to synchronization control based on the ON timings of the 2N freewheeling diodes and to generate an OFF synchronized signal being subjected to synchronization control based on the OFF timings of the 2N freewheeling diodes, the ON timings and the OFF timings being detected by the diode conducting state detecting unit;', 'a gate command generation PWM unit configured to generate a gate command signal for performing switching control on the switching element based on the ON synchronized signal and the OFF synchronized signal;', 'a gate ON-state detecting unit configured to detect ON timings and OFF timings of ...

CONTROL DEVICE FOR AN ELECTRIC MACHINE, METHOD FOR CONTROLLING SAID ELECTRIC MACHINE, AND MOTOR CONTROLLER

The present invention discloses a control device for an electric machine comprising a sensor interface designed to receive a sensor signal from a position sensor of the electric machine, wherein the position sensor is designed to detect the rotor position of the electric machine, a signal generator designed to generate a beat signal that corresponds to the sensor signal with a signal frequency increased by a beat frequency, a summation unit designed to form a sum signal from the sum of the beat signal with the sensor signal, and a correction unit designed to calculate a correction value for the sensor signal on the basis of a minimum of the sum signal. The present invention further discloses a corresponding method and a corresponding motor controller. 112. A control device () for an electric machine () , the control device comprising:{'b': 3', '4', '5', '2', '5', '2, 'a sensor interface () designed to receive a sensor signal () from a position sensor () of the electric machine (), wherein the position sensor () is designed to detect the rotor position of the electric machine ();'}{'b': 6', '7', '4', '4', '23', '8, 'a signal generator () designed to generate a beat signal () on the basis of the sensor signal (), said beat signal corresponding to the sensor signal () with a signal frequency () increased by a beat frequency ();'}{'b': 9', '10', '7', '4, 'a summation unit () designed to form a sum signal () from the sum of the beat signal () with the sensor signal ();'}{'b': 11', '12', '4', '20', '21', '10, '-a correction unit () designed to calculate a correction value () for the sensor signal () on the basis of a minimum (, ) of the sum signal ().'}2. The control device according to claim 1 ,{'b': 4', '13', '14, 'wherein the sensor signal () comprises a sine signal () and a cosine signal ();'}{'b': 6', '16', '13', '17', '14, 'wherein the signal generator () is designed to generate a sine beat signal () for the sine signal () and a cosine beat signal () for the cosine ...

INVERTER CONTROL APPARATUS AND INVERTER APPARATUS

In an inverter control apparatus, a phase current calculation section calculates each of phase currents flowing into a motor by using measurement results of a current sensor, and a voltage command generation section calculates three-phase voltage commands by using each of the estimated phase currents. A command modulation section compares the phase voltage commands with each other, to specify a full-on phase or a full-off phase on the basis of the comparison result and then to set the voltage command of the specified phase to a full-on voltage or a full-off voltage, and offsets the voltage commands of the other two phases according to the full-on voltage or the full-off voltage to modulate the voltage commands into voltage commands allowing the line voltage between the other two phases to be kept constant. A PWM signal generation section generates PWM signals by comparing, according to a predetermined rule set in advance, three carrier waves generated by a carrier wave generation section with each of the phase voltage commands modulated by the command modulation section. Accordingly, each of the phase currents can be calculated from a DC input current, so that the efficiency can be improved. 1. An inverter control apparatus applied to an inverter apparatus including an inverter which converts a DC voltage into an AC voltage and outputs the AC voltage to an AC motor , and a current sensor configured to measure a DC current on the input side of the inverter , the inverter control apparatus comprising:a phase current calculation section configured to calculate phase currents respectively flowing into the AC motor by using the measurement results of the current sensor;a voltage command calculation section configured to calculate three-phase voltage commands supplied to the AC motor by using the phase currents calculated by the phase current calculation section;a command modulation section configured to compare the phase voltage commands generated by the voltage command ...

MOTOR DRIVE DEVICE

A motor drive device is provided which is able to reduce loss between a drive power source and a controller. The motor drive device includes a plurality of motors, a single drive power source which drives these motors, and a controller which controls energizing times during which motor coils of the plurality of motors are energized, by a PWM drive method. The controller includes phase shift portion which sets a PWM signal for causing a current to flow to the motor, into a phase different per motor. By the phase shift portion setting the PWM signal for causing a current to flow to the motor into a phase different per motor, so-called overlap of energizing times of currents is avoided. 1. A motor drive device comprising:a plurality of motors;a single drive power source configured to drive the motors; anda controller configured to control energizing times during which motor coils of the plurality of motors are energized, by a PWM drive method, the controller including phase shift portion configured to set a PWM signal for causing a current to flow to the motor, into a phase different per motor.2. The motor drive device as claimed in claim 1 , wherein the motors are mounted on a vehicle.3. The motor drive device as claimed in claim 2 , wherein the motors are configured to drive wheels of an electric vehicle.4. The motor drive device as claimed in claim 1 , wherein the phase shift portion sets a shift time At for the phase of the PWM signal as Δt=tw/n which is obtained by dividing one cycle tw of the PWM signal by the number n of the motors to be driven by the controller.5. The motor drive device as claimed in claim 1 , wherein the controller includes a single calculation unit claim 1 , and switching elements which are respectively connected to the plurality of motors to be driven.6. The motor drive device as claimed in claim 1 , whereinthe controller includes a plurality of calculation units, and normal-time drive control unit configured to, when the plurality of ...

Rotor Flux Angle and Torque Trajectory Control Apparatus and Methods

Low speed and high speed estimates of rotor angle and speed relative to the stator are received from a low speed estimator and a high speed estimator, respectively. LS_θ_EST and a subset of torque-controlling I_Q trajectory curve (“IQTC”) parameter values appropriate to low speed rotor operation are selected for rotor speeds below a low speed threshold value ω_LOW_THRS. HS_θ_EST and a subset of IQTC curve parameter values appropriate to high speed rotor operation are selected for rotor speeds above a high speed threshold value ω_HIGH_THRS. LS_θ_EST and the low speed subset of IQTC parameter values remain selected for rotor speeds less than ω_HIGH_THRS after accelerating to a rotor speed greater than ω_LOW_THRS. HS_θ_EST and the subset of high speed IQTC parameter values remain selected for rotor speeds greater than ω_LOW_THRS after decelerating to a rotor speed less than ω_HIGH_THRS. 1. A field-oriented control (“FOC”) motor controller integrated circuit (“IC”) , comprising:a low speed estimator to generate a low speed estimate of a flux angle of a rotor (“LS_θ_EST”) in a motor;a high speed estimator to generate a high speed estimate of the rotor flux angle (“HS_θ_EST”) in the motor; andan acceleration control logic module coupled to the low speed estimator and to the high speed estimator to track LS_ω_EST and HS_ω_EST relative to a low rotor angular velocity threshold value ω_LOW_THRS and a high rotor angular velocity threshold value ω_HIGH_THRS.2. The FOC controller IC of claim 1 , further comprising:an I_Q trajectory generator coupled to the acceleration control logic module to receive at least one I_Q trajectory curve (“IQTC”) control parameter from the acceleration control logic module and to generate a set of time-sequenced values of a motor torque reference current signal I_Q_REF.3. The FOC controller IC of claim 2 , the IQTC having a linear shape and the IQTC shape parameters being a slope of the linear IQTC and a maximum value of I_Q_REF.4. The FOC ...

CONTROL DEVICE FOR AC ROTARY MACHINE

In a control device for an AC rotary machine, having an angle detector for detecting an electrical angle of the AC rotary machine, a detection error produced by the angle detector due to a noise magnetic field generated by a multi-phase alternating current flowing through an inverter connection unit is corrected using a correction signal having a phase and an amplitude that are determined in accordance with a relative positional relationship between the inverter connection unit and the angle detector and a current vector of the multi-phase alternating current, whereupon an inverter is controlled on the basis of the corrected electrical angle. As a result, a simple, low-cost control device for an AC rotary machine with which an angular position of a rotor can be detected with a high degree of precision is obtained. 1. A control device for an AC rotary machine , which controls an AC rotary machine in which a rotor is rotated by a rotating magnetic field formed by a multi-phase alternating current flowing through an armature winding of a stator , the control device comprising:an inverter that applies a voltage to the armature winding of the AC rotary machine;an inverter connection unit that connects the armature winding to the inverter;a magnetic field generator that generates an angle detecting magnetic field for detecting a rotation angle of the AC rotary machine by rotating in synchronization with the rotor;an angle detector that detects two mutually orthogonal components of the angle detecting magnetic field generated by the magnetic field generator as a sine signal and a cosine signal; anda control calculation unit that controls a voltage applied to the inverter on the basis of a current command of the AC rotary machine and angle information obtained from the sine signal and the cosine signal,wherein the control calculation unit includes an angle correction calculation unit that corrects an error in the angle information caused by a noise magnetic field generated ...

AIR CONDITIONER, AND METHOD AND DEVICE FOR CONTROLLING ITS COMPRESSOR TO STOP

An air conditioner, a method and a device for controlling a compressor in the same are disclosed in the present disclosure. The method includes: during a shutdown process of the air conditioner, controlling a drive circuit of the compressor to short three phase windings of the compressor if receiving a stop signal for stopping the compressor; and controlling a rotor of the compressor to stop according to a brake torque generated by shorting the three phase windings, to stop the compressor. The method shorts the three phase windings by controlling the drive circuit, thus to generate the brake torque to control the rotor to stop faster. As a result, the method enables the compressor to stop and to stay still rapidly, thereby facilitating to reduce a piping stress in the air conditioner and to prolong a working life of a pipe in the air conditioner. 1. A method for controlling a compressor in an air conditioner to stop , comprising:during a shutdown process of the air conditioner, controlling a drive circuit of the compressor to short three phase windings of the compressor when receiving a stop signal for stopping the compressor; andcontrolling a rotor of the compressor to stop according to a brake torque generated by shorting the three phase windings, to stop the compressor.2. The method according to claim 1 , wherein the drive circuit comprises six power switch tubes; the six power switch tubes constitute three phase bridge legs; wherein a first bridge leg of the three phase bridge legs has a first node claim 1 , a second bridge leg of the three phase bridge legs has a second node claim 1 , a third bridge leg of the three phase bridge legs has a third node claim 1 , the first node claim 1 , the second node and the third node are correspondingly connected with the three phase windings respectively claim 1 , and each of the six power switch tubes is antiparallel with a diode.3. The method according to claim 2 , wherein controlling a drive circuit of the compressor to ...

Quadrant Change Control in Brushless DC Motors

A method and apparatus for controlling a change in a quadrant of operation of a brushless direct current motor. A quadrant change in an operation of a motor is identified. In response to identifying the quadrant change, selected ones of a plurality of switches in a switch bridge are selected to be controlled to couple a direct current power source to the windings of the motor to change a direction of an actual current in the windings.

METHOD TO CONTROL LOADS USING ISOLATED DRIVE CIRCUITS

Methods and apparatus for providing DC motor gate driver isolation. In embodiments, first and second DC input signals are received at a supply control module, which generates first and second control signals for controlling first and second switches. A first transformer has a primary winding having one end coupled to the first DC input signal and another end coupled to the first switch A second transformer has a primary winding having one end coupled to the second DC input signal and another end coupled to the second switch. The supply control module controls the first and second control signals so that a secondary winding of the first or second transformer energizes an isolated AC bus coupled to the first and second transformers. First and second gate drivers receive respective isolated AC signals from the isolated AC bus. Conversion of the isolated AC signals back to DC occurs at the point of use. 1. A method , comprising:receiving a first DC input signal and a second DC input signal at a supply control module;generating, by the supply control module, a first control signal for controlling a first switch, and a second control signal for controlling a second switch,wherein a first transformer has a primary winding having one end coupled to the first DC input signal and another end coupled to the first switch, and a second transformer has a primary winding having one end coupled to the second DC input signal and another end coupled to the second switch;controlling, by the supply control module, the first and second control signals so that a secondary winding of the first or second transformer energizes an isolated AC bus coupled to the first and second transformers;receiving a first isolated AC signal at a first gate driver module for a motor phase, wherein the first isolated AC signal is generated by first and second coupled inductors, wherein the first coupled inductor is connected to the isolated AC bus; andreceiving a second isolated AC signal at a second gate ...

OPTICAL MECHANISM

An optical mechanism is provided, including a housing, a holder, a lens received in the holder, a driving assembly, and a base connected to the housing. The holder is movably disposed in the housing, and the lens has a first surface exposed to a first side of the holder and facing a first inner sidewall surface of the housing. The driving assembly is disposed in the housing for driving the holder and the lens to move relative to the housing. 1. An optical mechanism , comprising:a housing;a holder, movably disposed in the housing;a lens, disposed in the holder, having a first surface exposed to a first side of the holder and facing a first inner sidewall surface of the housing;a driving assembly, disposed in the housing for driving the holder and the lens to move relative to the housing; anda base, connected to the housing.2. The optical mechanism as claimed in claim 1 , wherein the lens further has a second surface exposed to a second side of the holder and facing a second inner sidewall surface of the housing claim 1 , and the second side is opposite to the first side.3. The optical mechanism as claimed in claim 2 , wherein the driving assembly has a coil and a magnetic unit claim 2 , the magnetic unit is affixed to the housing claim 2 , and the coil is affixed to a third side of the holder claim 2 , wherein the third side is adjacent to the first and second sides.4. The optical mechanism as claimed in claim 1 , wherein the first surface protrudes from the first side of the holder.5. The optical mechanism as claimed in claim 1 , wherein the first surface is a flat surface.6. The optical mechanism as claimed in claim 1 , wherein the first surface is aligned with the holder.7. The optical mechanism as claimed in claim 1 , wherein the optical mechanism further comprises an anti-reflection layer formed on the first inner sidewall surface.8. The optical mechanism as claimed in claim 1 , wherein the optical mechanism further comprises an ink layer disposed on the first ...

Time-Spread Control Cycles For Robotic Servomotors

A method of controlling a drive including one respective inverter associated with each of a plurality of servomotors in a robot. The method includes providing a PWM frequency corresponding to a frequency of switching instances for respective semiconductor switches in each of the inverters, whereby for each inverter time is divided into consecutive control cycles forming a sequence of control cycles of the inverter, each control cycle containing two, and only two, of the switching instances for each of the semiconductor switches. The method also includes spreading the respective control cycle sequences of the inverters over time such that the control cycles of each inverter are time shifted in respect to the control cycles of each of the other inverters in the power converter. 1. A method of controlling a drive a power converter including one respective inverter associated with each of a plurality of servomotors in a robot , the power converter being located externally of the robot , the method comprising:providing a Pulse-Width Modulation, PWM, frequency corresponding to a frequency of switching instances for respective semiconductor switches in each of the inverters, whereby for each inverter time is divided into consecutive control cycles forming a control cycle sequence of the inverter, each control cycle containing two, and only two, of the switching instances for each of the semiconductor switches;spreading the respective control cycle sequences of the inverters over time such that the control cycle sequence of each inverter is time shifted in respect to the control cycle sequence of each of the other inverters in the power converter; sending firing pulses to the semiconductor switches in each of the inverters in accordance with the spread control cycles; andfrom each of the inverters, outputting an alternating current having an electrical frequency formed by the inverter in response to the sent firing pulses, to the servomotor associated with the inverter via ...

POWER SUPPLY SYSTEM

In a power supply system using various kinds of storage batteries such as a large capacity storage battery or a small capacity storage battery, an electric power path is complicated, which may increase failures such as a short circuit trouble. There is a problem in that, when a short circuit trouble between storage batteries occurs, damage to a smaller capacity storage battery is serious. Accordingly, in a power supply system according to the present invention, the relationship among voltages, current capacities, and electric power capacities of various kinds of storage batteries such as a large capacity storage battery or a small capacity storage battery is defined so that damage to the storage batteries may be minimized even when malfunction occurs in, for example, switching a switch, and energy transfers from a higher voltage storage device. 1. A power supply system , comprising:a first storage battery and a second storage battery connected in parallel to electric power giving/receiving equipment;a bidirectional DC-DC converter configured to give/receive electric power between the first storage battery and the second storage battery;a switch configured to be able to independently isolate the first storage battery and the second storage battery from a load apparatus; anda controller configured to control the switch and the DC-DC converter,{'b': 1', '2, 'claim-text': [{'b': 1', '2, 'the first storage battery and the second storage battery are formed so that relational expressions VaU are satisfied; and'}, {'b': 1', '2', '1', '1, 'the nominal voltage Va of the first storage battery, the rated capacity U of the first storage battery, the nominal voltage Vb of the second storage battery, and the rated capacity U of the second storage battery are set so that, when electrical energy transfers from the second storage battery to the first storage battery, voltage increase of the first storage battery does not exceed a predetermined upper limit value VHlim, or, a ...

Magnetic thrust generation system

An apparatus comprises multiple electrically conductive loops, an elongated tubular ferromagnetic shield, and an elongated tubular superconductive inner shield. The superconductive inner shield is positioned within the ferromagnetic shield. Each conductive loop includes (i) a thrust segment extending from a first end of the superconductive inner shield outside the ferromagnetic shield to a second end of the superconductive inner shield and (ii) a return segment passing through an interior passage of the superconductive inner shield from the second end of the superconductive inner shield to the first end of the superconductive inner shield. The conductive loops can be spatially arranged relative to a uniform external magnetic field so that interaction between the external magnetic field and electrical current flowing in the conductive loops results in asymmetric magnetic flux density around, and non-zero net force exerted on, the conductive loops. 1. An apparatus comprising a set of two or more electrically conductive loops , an elongated tubular ferromagnetic shield , and an elongated tubular superconductive inner shield , wherein:(a) the superconductive inner shield is positioned within an interior passage of the ferromagnetic shield;(b) each conductive loop of the set is structurally arranged so as to define a conductive pathway that includes (i) a thrust segment extending from a first end of the superconductive inner shield outside the ferromagnetic shield to a second end of the superconductive inner shield and (ii) a return segment passing through an interior passage of the superconductive inner shield from the second end of the superconductive inner shield to the first end of the superconductive inner shield;(c) the set of conductive loops is arranged so that electrical current flows in the same direction in the thrust segments of the loops of the set.2. The apparatus of further comprising an electrical current source operatively coupled to the set of ...

Motor control system

A motor control system include an inverter configured to convert boosted direct-current electric power output from a boost converter to alternating-current electric power and supply the alternating-current electric power to an alternating current motor, and a control unit configured to adjust boosted voltage of the boost converter. The control unit includes an optimal boosted voltage map which defines optimal boosted voltage for operating the alternating current motor with a required number of revolutions and required torque, and a boosted voltage changing program that sets boosted voltage of the boost converter to a voltage which is higher than an optimal boosted voltage when the carrier frequency is a predetermined threshold value or lower.

Method and apparatus for synchronizing mdps motor and motor position sensor

A method for synchronizing an MDPS motor and a motor position sensor may include: sequentially aligning, by a controller, a rotor of the MDPS motor by sequentially applying preset three-phase current pulses to the MDPS motor, the three-phase current pulses corresponding to one electrical-angle cycle of the rotor of the MDPS motor, and detecting an actual rotational position of the aligned rotor through the motor position sensor; determining a zero point rotational position of the rotor based on the actual rotational position; determining a reference rotational position of the rotor based on the actual rotational position and the number of pole pairs in the MDPS motor, and determining an offset rotational position of the rotor based on the actual rotational position and the reference rotational position; and correcting the zero point rotational position by adding the offset rotational position to the zero point rotational position.

CURRENT SENSING BASED COMMUTATION CONTROL

A method for controlling a single coil brushless DC motor, the method comprising at least a first EHP sequence which comprises: driving the motor using a driving signal during a torque generating period, to accelerate the motor, such that during a subsequent generator mode period a phase current goes in generator mode; driving the motor during the generator mode period using a generator mode signal, which allows the phase current to be in generator mode; monitoring the phase current during the generator mode period thereby obtaining phase current information; and determining parameters of a next EHP sequence based on the obtained phase current information. 1. A method for controlling a single coil brushless DC motor , the method comprising at least a first EHP sequence which comprises:driving the motor using a driving signal during a torque generating period, to accelerate the motor, such that during a subsequent generator mode period a phase current goes in generator mode,driving the motor during the generator mode period using a generator mode signal, which allows the phase current to be in generator mode,monitoring the phase current during the generator mode period thereby obtaining phase current information,and determining parameters of a next EHP sequence based on the obtained phase current information.2. A method according to wherein part of the obtained phase current information is timing information comprising a first zero crossing moment of the phase current and/or a second zero crossing moment of the phase current and/or a zero crossing moment of a time derivative of the phase current in between the first and the second zero crossing moment of the phase current.3. A method according to wherein the determining step comprises determining a rising edge and/or a falling edge of a driving signal of the next EHP sequence based on the obtained phase current information.4. A method according to wherein the determining step comprises determining a rising edge and/ ...

SLIDE ACTUATOR

A slide actuator according to the present invention includes: a fixed member; a movable member movable in a predetermined direction with respect to the fixed member; a wall portion of the fixed member disposed in a moving direction of the movable member; a plurality of balls interposed between the fixed member and the movable member and configured to movably support the movable member; a retainer configured to maintain a constant distance between the respective balls; a retainer spring connected between the wall portion and the retainer; and a movable portion spring connected between the movable member and the wall portion, in which the retainer spring is disposed so as to suppress a displacement of the retainer in the moving direction, and the movable portion spring is disposed so as to suppress a displacement of the movable member in the moving direction. 1. A slide actuator comprising:a fixed member;a movable member movable in a predetermined direction with respect to the fixed member;a wall portion of the fixed member disposed in a moving direction of the movable member;a plurality of balls interposed between the fixed member and the movable member and configured to movably support the movable member;a retainer interposed between each of the plurality of balls and configured to maintain a constant distance between each of the plurality of balls;a first structural body having spring property and connected between the wall portion and the retainer; anda second structural body having spring property and connected between the wall portion and the movable member, whereinthe first structural body is disposed so as to suppress a displacement of the retainer in the moving direction, andthe second structural body is disposed so as to suppress a displacement of the movable member in the moving direction.2. The slide actuator according to claim 1 , whereinthe first structural body is disposed on both sides of the retainer, andthe second structural body is disposed on both ...

APPARATUS AND METHOD OF CONTROLLING COMPRESSOR, AND AIR CONDITIONER INCLUDING THE SAME

A compressor control apparatus includes a rectifier configured to rectify AC power to DC power; an inverter including a plurality of switching elements, configured to convert the DC power into a three-phase voltage according to a pulse width modulation (PWM) signal applied to the plurality of switching elements; a motor configured to receive a three-phase current based on the three-phase voltage; a current detector configured to detect a sum of a first phase current, a second phase current, and a third phase current supplied to the motor; and a controller configured to differently determine a duty ratio of the PWM signal applied to each of the plurality of switching elements, and to determine the first phase current, the second phase current, and the third phase current, respectively, based on the determined duty ratio and the sum of the currents detected from the current detector. 1. A compressor control apparatus comprising:a rectifier configured to rectify AC power to DC power;an inverter including a plurality of switching elements, configured to convert the DC power into a three-phase voltage according to a pulse width modulation (PWM) signal applied to the plurality of switching elements;a motor configured to receive a three-phase current including a first phase current, a second phase current, and a third phase current based on the three-phase voltage;a current detector configured to detect a sum of the first phase current, the second phase current, and the third phase current; and differently determine a duty ratio of the PWM signal applied to each of the plurality of switching elements, and', 'determine the first phase current, the second phase current, and the third phase current, respectively, based on the determined duty ratio and the sum of the first phase current, the second phase current, and the third phase current detected by the current detector., 'a controller configured to'}2. The compressor control apparatus according to claim 1 , wherein the ...

DC POWER-SUPPLY DEVICE, MOTOR DRIVE DEVICE INCLUDING THE SAME, AND REFRIGERATION-CYCLE APPLICATION DEVICE INCLUDING THE MOTOR DRIVE DEVICE

A first reactor is provided on the input side of a rectifying circuit that rectifies AC power (on the side of an AC power supply), and on the output side of the rectifying circuit (on the side of a load), first and second capacitors that are connected in series to each other, and first and second switching elements that switch between charging and not charging of the first and second capacitors, respectively, are provided, a second capacitor group in Y-connection, provided with three capacitors, each of which is connected to each phase-terminal of the first reactor on the side of the rectifying circuit, is connected to the midpoint of the first and second switching elements, and the output voltage to the load is boosted, while the on-duty of the first switching element and the on-duty of the second switching element are controlled to be equal to each other. 1. A DC power-supply device that converts an alternating current supplied from an AC power supply to a direct current , and that supplies the direct current to a load , the DC power-supply device comprising:a rectifying circuit that rectifies the alternating current;a first reactor that is inserted between the AC power supply and the rectifying circuit for each phase;a first capacitor group that is provided with a first capacitor and a second capacitor connected in series to each other, and that is connected between output terminals to the load;a switching element group that is provided with a first switching element and a second switching element connected in series to each other, and that is connected in parallel to between the rectifying circuit and the first capacitor group;a backflow prevention unit that prevents a backflow of electric charge to the switching element group, where the electric charge is stored in the first capacitor group by an operation of the switching element group; anda second capacitor group that is provided with three capacitors, in each of which one end is electrically connected to a ...

Apparatus for detecting the rotor position of an electric motor and related method

An apparatus for detecting a position of a rotor of a DC motor with N phases having a plurality of windings. The apparatus includes circuitry to couple at least two of the windings between a supply voltage and a reference voltage according to a first current path and allow the current stored in the two windings to be discharged through a second current path. The circuitry is configured to force the at least two windings at a short circuit condition in the second current path. The apparatus also includes a measurement circuit configured to measure the time period of discharging the current stored in the two windings and a rotor position detector for detecting the rotor position based on the measured time period.

POWER CONVERSION DEVICE, POWER CONVERSION METHOD AND PROGRAM

A power conversion device includes processing circuitry that estimates a magnet magnetic flux of an electric motor based on a d-axis magnetic flux generated in the electric motor, a d-axis inductance of the electric motor, and a d-axis current flowing in the electric motor, estimates a q-axis inductance of the electric motor based on a q-axis magnetic flux generated in the electric motor and a q-axis current flowing in the electric motor, estimates a drive force of the electric motor based on the magnet magnetic flux and the q-axis inductance, and corrects a current command such that the drive force follows a drive force command. 1. A power conversion device , comprising:processing circuitry configured to estimate a magnet magnetic flux of an electric motor based on a d-axis magnetic flux generated in the electric motor, a d-axis inductance of the electric motor, and a d-axis current flowing in the electric motor, estimate a q-axis inductance of the electric motor based on a q-axis magnetic flux generated in the electric motor and a q-axis current flowing in the electric motor, estimate a drive force of the electric motor based on the magnet magnetic flux and the q-axis inductance, and correct a current command such that the drive force follows a drive force command.2. The power conversion device according to claim 1 , further comprising:a filter that reduces a noise component of a q-axis inductance gain,wherein the processing circuitry is further configured to estimate the q-axis inductance by being further configured to calculate the q-axis inductance gain, which represents a relationship between the q-axis inductance and the q-axis current, based on the q-axis magnetic flux and the q-axis current, and calculate the q-axis inductance based on the q-axis inductance gain, which has passed through the filter, and the q-axis current.3. The power conversion device according to claim 1 , wherein the processing circuitry is further configured to estimate an angular error ...

METHOD FOR OPERATING AN ELECTRIC MACHINE

A method for checking an operation of an electric machine, which has three phases. For pulses of a first electric variable of the three phases, a pulse width modulation is carried out. Depending in each case on a positioning of electromechanical components of the electric machine with respect to one another, the first electric variable has a pulse with a longest pulse width for a first of the three phases, a pulse with an intermediate pulse width for a second of the three phases, and a pulse with a shortest pulse width for a third of the three phases. A cycle of the pulse width modulation is delimited by two points in time. 111-. (canceled)12. A method for checking an operation of an electric machine , which has three phases , comprising:for pulses of a first electric variable of the three phases, a pulse width modulation is carried out, wherein, depending in each case on a positioning of electromechanical components of the electric machine with respect to one another, a first electric variable has a pulse with a longest pulse width for a first of the three phases, a pulse with an intermediate pulse width for a second of the three phases, and a pulse with a shortest pulse width for a third of the three phases, wherein a cycle of the pulse width modulation is delimited by two points in time, including, a point in time at the beginning of the cycle and a point in time at the end of the cycle, wherein a first pulse of the three phases is shifted with respect to a first of the two points in time that delimit the cycle and a second pulse of the three phases is shifted with respect to a second of the two points in time that delimit the cycle, wherein at least one value of a second electric variable is measured during the cycle within at least one measurement window.13. The method according to claim 12 , wherein the at least one value of the second electric variable is measured for an intermediate circuit of the electric machine.14. The method according to claim 12 , ...

Motor Control Device

To provide a motor control device capable of properly compensating the fluctuation in inverter output voltage during a dead time. The motor control device is for an inverter including switching elements composing upper and lower arms to convert a direct-current voltage to an alternating-current voltage and apply the alternating-current voltage to a motor thereby controlling a current of the motor to be a current target value, the motor control device including a dead time compensation unit that compensates fluctuation in inverter output voltage during a dead time with each switching between the upper and lower arms by a dead time compensation voltage, wherein the dead time compensation unit acquires an input parameter that determines a polarity of motor current during the dead time in a half-cycle of a fundamental wave of the motor current, and varies the dead time compensation voltage according to magnitude of the input parameter. 1. A motor control device for an inverter including switching elements composing upper and lower arms to convert a direct-current voltage to an alternating-current voltage and apply the alternating-current voltage to a motor thereby controlling a current of the motor to be a current target value , the motor control device comprisinga dead time compensation unit that compensates fluctuation in inverter output voltage during a dead time with each switching between the upper and lower arms by a dead time compensation voltage,wherein the dead time compensation unit acquires a parameter that determines a polarity of motor current during the dead time in a half-cycle of a fundamental wave of the motor current, and varies the dead time compensation voltage according to magnitude of the parameter.2. The motor control device according to claim 1 , wherein the dead time compensation voltage is product of a base compensation voltage and a coefficient of variable capacitance claim 1 , the base compensation voltage being set based on a polarity of the ...

POWER SUPPLY SYSTEM

A power supply system is provided. The power supply system includes a power supply system comprises a first rectifier receiving an AC power from a first input AC power source, converting the AC power into a first DC power and outputting the first DC power to a connection node, one or more motors connected in parallel to the connection node, the motors being respectively connected to inverters converting the DC power provided from the connection node into an AC power to control the motors, and an auxiliary power source supplying a second DC power to the connection node when the supply of the first DC power is interrupted, or when an overload of the motors occurs. 1. A power supply system comprising:a first rectifier configured to receive a first input AC power from a first input AC power source, to convert the first input AC power into a first DC power, and to output the first DC power to a connection node;one or more motors connected in parallel to the connection node, each of the one or more motors being connected to a respective one of one or more inverters, the one or more inverters configured to convert the DC power at the connection node into converted AC power, the one or more motors configured to receive the converted AC power; andan auxiliary power source configured to supply a second DC power to the connection node based on one or more of an interrupt in a supply of the first DC power and an overload condition of the one or more motors.2. The power supply system of claim 1 , wherein the auxiliary power source comprises:a battery configured to store the second DC power therein; and provide the first DC power from the connection node to the battery by converting a voltage of the first DC power into a target voltage, and', 'output the second DC power to the connection node by converting an output voltage of the second DC power provided by the battery into an output voltage of the connection node., 'a chopper configured to,'}3. The power supply system of claim ...

Device, method and system for controlling rotation speed of motor

The present application discloses a device, method and system for controlling a rotation speed of a motor. The device includes: a reference voltage generating module generating a reference voltage; a PWM signal converting module converting a PWM signal into a voltage signal; a first comparator outputting a first level or a second level; a first switching element having a control terminal connected with an output terminal of the first comparator and a first terminal input with a first signal, and being turned on when receiving the second level and being turned off when receiving the first level; a follower having an input terminal connected with the PWM signal converting module; and a control signal outputting terminal outputting the first signal or the voltage signal. The device, method and system are capable of controlling the rotation speed of the motor to jump at a specific duty cycle.

Power Semiconductor Device, Method for Manufacturing Power Semiconductor Device, and Power Conversion Device

In a power semiconductor device, power semiconductor elements are mounted on a large die pad and the like. The large die pad is joined to a power lead via a lead stepped portion. The large die pad has a first end portion and a second end portion located with a distance therebetween in the X axis direction. In the Y axis direction, the lead stepped portion is joined to the first end portion side relative to a central line between the first end portion and the second end portion. The large die pad is inclined such that a distance between the large die pad and the first main surface of the molding resin is longer from the first end portion toward the second end portion.

Drive Apparatus and Drive Method for Brushless Motor

A drive apparatus and a drive method for a brushless motor, capable of reducing noise occurring due to pulse shift processing, is provided. The drive apparatus for the brushless motor comprises one shunt resistor and a controller. The shunt resistor measures a phase current of the three-phase brushless motor. The controller measures the phase current of the brushless motor in a one-shunt system by using the shunt resistor, and controls driving of the brushless motor based on the measured phase current. The controller performs pulse shift when a voltage pulse width in a drive wire of the brushless motor is greater than a predetermined value, whereas the controller does not perform the pulse shift when the voltage pulse width is less than the predetermined value. 1. A drive apparatus for a three-phase brushless motor , comprising:a shunt resistor for measuring a phase current of the brushless motor; anda controller that measures the phase current of the brushless motor in a one-shunt system by using the shunt resistor, and controls driving of the brushless motor based on the measured phase current, in which the controller performs pulse shift when a voltage pulse width in a drive wire of the brushless motor is greater than a predetermined value, whereas the controller does not perform the pulse shift when the voltage pulse width is less than the predetermined value.2. The drive apparatus for the brushless motor claim 1 , according to claim 1 , wherein the controller comprises a drive circuit that drives the brushless motor claim 1 , and a control unit that controls the drive circuit.3. The drive apparatus for the brushless motor claim 2 , according to claim 2 , wherein the drive circuit comprises a three-phase bridge circuit claim 2 , each phase of which is provided with a pair of switching elements claim 2 , the drive circuit converting a direct-current power supplied from a power source into an alternating-current power claim 2 , to supply the alternating-current ...

POWER CONVERSION DEVICE, MOTOR DRIVING SYSTEM, AND CONTROL METHOD

In a power converter, a first single-phase AC conversion unit, which is connected to a first line of a first phase and a second line of a second phase of a first three-phase AC, a second single-phase AC conversion unit, which is connected to the second line of the second phase and a third line of a third phase of the first three-phase AC, and a third single-phase AC conversion unit, which is connected to the third line of the third phase and the first line of the first phase of the first three-phase AC, form a delta-connected load for an AC power supply system. At least the first single-phase AC conversion unit, the second single-phase AC conversion unit, and the third single-phase AC conversion unit form a first set in which respective output terminals are connected in series to one another, and the first set, and a second set and a third set, which are different from the first set, form each phase of a star connected power supply. A reactive power control unit controls a reactive power of a converter of each single-phase AC conversion unit based on a reactive power command value generated based on an acquired value related to an active power. 1. A power conversion device having AC power input terminals for receiving first three-phase AC power from an AC power supply system and AC power output terminals for outputting second three-phase AC power to a system to which a load is connected , the power conversion device comprising:a plurality of single-phase AC conversion units each having at least first and second switching elements and configured to convert a part of the first three-phase AC power supplied to input terminals thereof to output from output terminals thereof; anda controller configured to control each of the first and second switching elements to be brought into any one of an ON state as a conductive state and an OFF state as a non-conductive state,wherein the single-phase AC conversion unit comprises at least:a voltage type converter configured to ...

POWER CONVERSION DEVICE, MOTOR CONTROL SYSTEM, AND DIAGNOSIS METHOD FOR POWER CONVERSION DEVICE

A temperature abnormality of the power module is accurately detected. A power conversion device including a power semiconductor module with a switching element, includes: a gate driver circuit configured to drive a switching element and transmitting a response signal upon a switching operation of the switching element; a control unit device configured to output to a gate driver circuit an instruction signal for switching; a temperature detection unit configured to calculate a bonding temperature of the switching element based on a response signal to the instruction signal; and a calculation unit configured to determine a state of a power semiconductor module according to a bonding temperature calculated by the temperature detection unit and the response signal. 1. A power conversion device comprising a power semiconductor module including a switching element , wherein a gate driver circuit configured to drive the switching element and transmit a response signal upon a switching operation of the switching element;', 'a control unit device configured to output to the gate driver circuit an instruction signal for switching;', 'a temperature detection unit configured to calculate a bonding temperature of the switching element based on the response signal to the instruction signal; and', 'a calculation unit configured to determine a state of the power semiconductor module according to the bonding temperature calculated by the temperature detection unit and the response signal., 'the power conversion device comprises2. The power conversion device according to claim 1 , whereinthe gate driver circuit is configured to generate the response signal based on a voltage between a gate and an emitter and a first drive voltage set value or a second drive voltage set value which is at least a binary switch-off reference voltage upon the switching operation of the switching element.3. The power conversion device according to claim 1 , whereinthe temperature detection unit is ...

DRIVE AND CONTROL FOR SIX-PHASE ELECTRICAL MACHINES WITH NEGLIGIBLE COMMON-MODE VOLTAGE

A drive and motor system and method for a six phase machine with negligible common-mode voltage is provided. The six-phase machine includes six phase windings divided into at least two windings groups configured to generate a zero common-mode pulse width modulation. The drive and motor system and method can also include at least one direct current source and a six phase inverter switching between positive and negative power of the at least one direct current source. 1. A motor and drive system , comprising:at least one direct current source;a six phase inverter switching between positive and negative power of the at least one direct current source;a six phase machine including six phase windings divided into at least two windings groups configured to result in a zero common-mode pulse width modulation across the at least two windings groups.2. The motor and drive system of claim 1 , wherein common-mode noises are conducted through the six phase windings of the six-phase machine through at least one parasitic capacitor to a ground during the zero common-mode pulse width modulation.3. The motor and drive system of claim 1 , wherein the six phase windings are distributed at a 60 degrees difference in space.4. The motor and drive system of claim 1 , wherein the each windings group forms a three-phase claim 1 , 120° phase-shift machine.5. The motor and drive system of claim 1 , wherein the six phase windings include at least two separate neutral connections claim 1 , where a maximum modulation index is approximate to 1.15.6. The motor and drive system of claim 1 , wherein a parasitic capacitance between windings and ground is modeled as one common-mode capacitor for a common-neutral connection or two substantially equal common-mode capacitors for two separate neutral connections.7. The motor and drive system of claim 1 , wherein the six phase windings include a common neutral connection claim 1 , where a maximum modulation index is 1.8. The motor and drive system of ...

IMAGING DEVICE AND ELECTRONIC DEVICE

The present technology relates to an imaging device and an electronic device that enable highly accurate adjustment of a focus position and a camera shake correction position. The device includes: a lens that focuses subject light; an imaging element that photoelectrically converts the subject light from the lens; a circuit substrate including a circuit that externally outputs a signal from the imaging element; an actuator that drives the lens with a Pulse Width Modulation (PWM) waveform in at least one of an X-axis direction, a Y-axis direction, or a Z-axis direction; and a detection unit that detects a magnetic field generated by a coil included in the actuator. The actuator drives the lens to move a focus, or drives the lens to reduce an influence of camera shake. The present technology can be applied to the imaging device. 1. An imaging device comprising:a lens that focuses subject light;an imaging element that photoelectrically converts the subject light from the lens;a circuit substrate including a circuit that externally outputs a signal from the imaging element;an actuator that drives the lens with a Pulse Width Modulation (PWM) waveform in at least one of an X-axis direction, a Y-axis direction, or a Z-axis direction; anda detection unit that detects a magnetic field generated by a coil included in the actuator.2. The imaging device according to claim 1 , whereinthe actuator drives the lens to move a focus, or drives the lens to reduce an influence of camera shake.3. The imaging device according to claim 2 , whereinthe Z-axis direction is a direction for moving the focus, and the X-axis direction and the Y-axis direction are directions for reducing the influence of the camera shake.4. The imaging device according to claim 1 , whereinthe detection unit detects induced electromotive force generated by the magnetic field.5. The imaging device according to claim 4 , whereinthe detection unit detects a position of the lens from the induced electromotive force.6. ...

ROTATION ANGLE ESTIMATION APPARATUS FOR ROTATING ELECTRIC MACHINE

A rotation angle estimation apparatus includes: a high-frequency voltage setting unit that sets high-frequency voltages; a circuit operating unit that operates an electric power conversion circuit to apply each of the high-frequency voltages to a corresponding one of winding groups of a rotating electric machine; and a rotation angle estimating unit that estimates a rotation angle of the rotating electric machine based on at least one of high-frequency currents that flow in the winding groups upon application of the high-frequency voltages to the winding groups. Moreover, the high-frequency voltage setting unit sets the high-frequency voltages based on the spatial phase difference between the winding groups so that in a fixed coordinate system of the rotating electric machine, the magnitude of a resultant vector of a plurality of high-frequency voltage vectors, which are respectively applied to the winding groups, becomes smaller than the magnitude of each of the high-frequency voltage vectors. 1. A rotation angle estimation apparatus for a rotating electric machine , the rotation angle estimation apparatus being applied to a system which includes the rotating electric machine and an electric power conversion circuit , the rotating electric machine including a stator having a plurality of winding groups wound therein , each of the winding groups being offset from another of the winding groups to have a spatial phase difference therebetween , the electric power conversion circuit being electrically connected with the winding groups to apply voltages to the winding groups ,the rotation angle estimation apparatus comprising:a high-frequency voltage setting unit that sets a plurality of high-frequency voltages which change at an angular velocity higher than an electrical angular velocity of the rotating electric machine;a circuit operating unit that operates the electric power conversion circuit to apply each of the high-frequency voltages set by the high-frequency ...

Vibration Conformance Compensation Device and Compensation Method Thereof

A vibration conformance compensation device includes a linear motor including a vibrator and a coil, a signal generator connecting with the linear motor electrically and outputting a drive signal for driving the linear motor to vibrate, a working parameter feedback module, a processing module connecting having a target vibration state value which is set in the linear motor in advance for comparing the real-time vibration state parameters of the linear motor with the target vibration state value to obtain the comparison result, and a signal conditioning module connecting with the processing module and the signal generator electrically and adjusting the drive signal in accordance with the comparison result to make the vibration state of the linear motor consistent with the target vibration state.

POWER CONVERSION APPARATUS, DRIVE CONTROL SYSTEM, MACHINE LEARNING APPARATUS, AND MOTOR MONITORING METHOD

A power conversion apparatus includes a main circuit unit, a control unit, a current sensor, and a half-wave rectifier unit. The control unit includes current frequency calculation units and monitoring units. The current frequency calculation units calculate current frequencies based on at least either the rising timing or falling timing of current detection signals half-wave rectified by the half-wave rectifier unit. The monitoring units monitor the speed of a motor based on the current frequencies calculated by the current frequency calculation units. 1. A power conversion apparatus comprising:a main circuit to convert DC power into AC power, and supply the converted AC power to a motor;a controller to control the main circuit;a current sensor to detect a current supplied from the main circuit to the motor; anda half-wave rectifier to half-wave rectify a current detection signal output from the current sensor, whereinthe controller includes:a first processing circuitto calculate a current frequency based on at least either a rising timing or a falling timing of the current detection signal half-wave rectified by the half-wave rectifier, the current frequency being a frequency of the current; andto monitor a speed of the motor based on the current frequency calculated.2. The power conversion apparatus according to claim 1 , further comprising:a hysteresis comparator to compare, with different threshold values, the rising timing and the falling timing of the current detection signal half-wave rectified by the half-wave rectifier, whereinthe first processing circuit calculates the current frequency based on the rising timing and the falling timing obtained from results of the comparison performed by the hysteresis comparator.3. The power conversion apparatus according to claim 1 , whereinthe first processing circuit stops power supply from the main circuit to the motor when the current frequency calculated or a value directly proportional to the current frequency ...

BUS CAPACITOR BANK CONFIGURATION FOR A REGENERATIVE DRIVE

A regenerative elevator drive device, a method for buffering energy of a regenerative elevator drive device, and an elevator system are disclosed. The regenerative elevator drive device may include an inverter having a plurality of power components and a converter having a plurality of power components. The regenerative drive may further include a direct current (DC) link bridging the inverter and the converter, the DC link including a first capacitor bridging the inverter and the converter and a second capacitor in parallel with the first capacitor. The regenerative elevator drive device may be a multi-level regenerative drive device. 120. A regenerative drive device () , comprising:{'b': 22', '25, 'an inverter () having a plurality of power components ();'}{'b': 21', '25, 'a converter () having a plurality of power components ();'}{'b': 23', '22', '21', '23, 'claim-text': [{'b': 43', '22', '21, 'an first capacitor () bridging the inverter () and the converter (); and'}, {'b': 49', '43, 'a second capacitor () in parallel with the first capacitor ().'}], 'a direct current (DC) link () bridging the inverter () and the converter (), the DC link () comprising22043. The regenerative drive device () of claim 1 , wherein the first capacitor () is a film capacitor.32049. The regenerative drive device () of claim 1 , wherein the second capacitor () is an electrolytic capacitor.42020. The regenerative drive device () of claim 1 , wherein drive device () is an elevator drive.5202522. The regenerative drive device () of claim 1 , wherein at least one member of the plurality of power components () of the inverter () is an insular-gate bipolar transistor.62025. The regenerative drive device () of claim 1 , wherein at least one member of the plurality of power components () of the converter is an insular-gate bipolar transistor.72020. The regenerative drive device () of claim 1 , wherein the regenerative drive () is a multi-level regenerative drive.8204943. The regenerative drive ...

CONTROLLER AND CONTROL METHOD FOR ELECTRIC MOTOR

To provide controller and control method for an electric motor including plural energization systems composed of an inverter and coils corresponding to plural phases. According to the present invention, if any abnormality is detected in one energization system being energized through first diagnosis processing, second diagnosis processing is executed on the energization system having the abnormality detected, which is switched to an unenergized state. Then, if the second diagnosis processing reveals occurrence of a short-circuit, a control gain of a normal energization system is lowered. In addition, a threshold used in the first diagnosis processing on the normal energization system is changed so as to make it difficult to detect an abnormality, hereby keeping the energization control on the normal energization system. Hence, if a short-circuit occurs in at least one of the energization systems, it is possible to avoid stopping the output from the normal energization system. 114.-. (canceled)15. A controller for an electric motor equipped with a plurality of energization systems composed of an inverter and coils corresponding to a plurality of phases , the controller comprising a control unit for detecting occurrence of a short-circuit in each of the energization systems through a first processing for detecting occurrence of an abnormality in the energization system being energized and a second processing for detecting occurrence of an abnormality in the energization system being unenergized , and changing , if a short-circuit is detected in at least one of the energization systems , a control parameter for the energization system having no short-circuit detected ,wherein the control unit executes the second processing on the energization system having an abnormality detected through the first processing and executes, when no abnormality is detected through the second processing, the second processing on the energization system having no abnormality detected ...

STEPLESS MOTOR DRIVING CIRCUIT AND ASSOCIATED DRIVING METHOD

A stepless motor driving circuit provides a sinusoidal shaped chopping signal for driving a motor. The driving circuit has: a switch circuit having an input which receives a rectified signal rectified from a sinusoidal AC signal and having a first output and a second output where the motor is coupled between; a synchronizing signal generating circuit which generates a synchronizing signal relating to the sinusoidal AC signal; and a switch driving circuit which selects and chops at least one switch in the switch circuit according to the synchronizing signal, and to form the sinusoidal shaped chopping signal which is corresponding to the sinusoidal AC signal. 1. A stepless motor driving circuit , comprising:a switch circuit having an input, a ground end, a first output and a second output, the input of the switch circuit configured to receive a rectified signal, wherein the rectified signal is rectified from a sinusoidal AC signal, the motor coupled between the first output and the second output;a synchronizing signal generating circuit configured to generate a synchronizing signal relating to the sinusoidal AC signal, wherein the synchronizing signal is in a first state at a first half cycle period of the sinusoidal AC signal and is in a second state at a second half cycle period of the sinusoidal AC signal; anda switch driving circuit configured to select and chop at least one switch in the switch circuit according to the synchronizing signal at a second frequency different from frequency of the sinusoidal AC signal in each state of the synchronizing signal, and to form a sinusoidal shaped chopping signal between the first output and the second output, wherein the outline of the sinusoidal shaped chopping signal is corresponding to the sinusoidal AC signal.2. The stepless motor driving circuit of claim 1 , wherein the switch circuit comprises a first switch claim 1 , a second switch claim 1 , a third switch and a fourth switch claim 1 , wherein the first switch is ...

HYSTERESIS BASED DC OFFSET CORRECTOR FOR CURRENT RECONSTRUCTION WHEN USING DISCONTINUOUS PWM

Disclosed embodiments are directed to a technique to remove DC offset from current measurement signals through shunt resistors in digital signal processing for current reconstruction when using discontinuous pulse width modulation (DPWM). Such measurements regarding current are pertinent to a feedback loop used for a system including a DC-link capacitor, inverter, and motor. A method of removing DC offset comprises: determining a three-phase output current signal of an inverter, wherein the inverter is coupled to a motor and a power supply; producing a voltage signal based on the three-phase output current signal and the resistances of one or more shunt resistors disposed in the inverter; applying an analog gain circuit to the voltage signal; processing the voltage signal with an analog-to-digital converter (ADC); applying a DC offset corrector to the voltage signal; and performing current reconstruction on the voltage signal to produce a continuous current signal. 1. A method of removing DC offset from voltage signals , comprising:determining a three-phase output current signal of an inverter, wherein the inverter is coupled to a motor and a power supply;producing a voltage signal based on the three-phase output current signal and the resistances of one or more shunt resistors disposed in the inverter;applying an analog gain circuit to the voltage signal;processing the voltage signal with an analog-to-digital converter (ADC);applying a DC offset corrector to the voltage signal, wherein the DC offset corrector is configured to operate in a closed feedback loop to remove DC offset from the voltage signal until the DC offset is within an upper limit and a lower limit; andperforming current reconstruction on the voltage signal to produce a continuous current signal.2. The method of claim 1 , wherein each of the one or more shunt resistors is coupled to a phase switch.3. The method of claim 1 , wherein the analog gain circuit increases the voltage signal by a factor of ...

VOICE COIL MOTOR, COIL BLOCK FOR VOICE COIL MOTOR, METHOD OF MANUFACTURING THE COIL BLOCK, AND VOICE COIL MOTOR HAVING THE COIL BLOCK

A VCM (voice coil motor) is disclosed, the VCM comprising: a bobbin formed with a support unit protruded from a periphery of a body at a bottom portion of the body, and a recess unit partially removed at the support unit; and a coil block supported by the support unit and including a plurality of coil layers wound at a periphery of the bobbin, wherein first and second distal ends of the coil block pass through the recess unit. 1. A VCM (Voice Coil Motor) , the VCM comprising:a base;a housing disposed on the base and coupled to the base;a magnet disposed on the housing;a bobbin including a support unit protruded from a periphery of a lower portion of the bobbin, wherein a portion of the support unit is formed with a first groove, and the first groove is extended to a lower surface of the bobbin;a coil block arranged at a periphery of the bobbin and facing the magnet, and supported by the support unit;a first elastic member supporting an lower portion of the bobbin;a second elastic member supporting a upper portion of the bobbin;a cover can covering the housing, and including an upper plate formed with an opening and a lateral plate extended from an edge portion of the upper plate towards the base, and coupled to the base;wherein the first elastic member is formed in a pair having a first member and a second member electrically separated from the first member,wherein one distal end of the coil block passes through the first groove of the bobbin and is connected to the first member of the first elastic member, andwherein the other distal end of the coil block is connected to the second member of the first elastic member.2. The VCM of claim 1 , wherein each of the first and second members includes an inner portion coupled to the bobbin claim 1 , an outer portion arranged between the housing and the base claim 1 , and a connection portion connecting the inner portion to the outer portion.3. The VCM of claim 2 , wherein a first hole is formed at the outer portion of the ...

APPARATUS FOR CONTROLLING ALTERNATING-CURRENT ROTARY ELECTRIC MACHINES

In an apparatus, a combination unit selects one of three-phase currents flowing in a three-phase alternating-current rotary electric machine. The combination unit shifts the captured values of at least one of the remaining two phase currents other than the reference phase current by 120 electrical degrees. The combination unit combines the shifted captured values of the at least one of the remaining two phase currents to the captured values of the reference phase current to obtain combined values of the reference phase current. A coefficient calculator integrates, for each of the calculation angles, function values based on the combined values of the reference phase current over the at least one period of the electrical angle of the three-phase rotary electric machine to calculate a Fourier coefficient for the reference phase current. 1. An apparatus for controlling switching elements of an inverter to control a three-phase alternating-current rotary electric machine in accordance with measured values of at least first and second phase currents in three-phase currents flowing in the alternating-current rotary electric machine , the apparatus comprising:an obtaining unit configured to obtain a value of each phase current based on the measured values of the at least first and second phase currents for each calculation angle of the alternating-current rotary electric machine, the calculation angles having intervals therebetween;an interval setter configured to set each of the intervals between the calculation angles to an electrical angle, the electrical angle being a submultiple of (k×360) electrical degrees and being unequal to a submultiple of 120 electrical degrees for at least one period of the electrical angle of the three-phase rotary electric machine where k represents the number of the at least one period and is a positive integer variable; select one of the three-phase currents as a reference phase current;', 'shift the captured values of at least one of the ...

Motor Drive Voltage Control Device and Method for Controlling Motor Drive Voltage

To suppress a decline in the control accuracy of an applied voltage associated with an increase in quantum noise, and to increase the control accuracy of a motor speed. When generating a driving voltage signal supplied to a motor from a driving command signal, a motor-driving voltage control device reduces the gradation level and performs noise-shaping modulation before performing PWM modulation. Reducing the gradation level allows the degree of gradation of the driving voltage signal to be within the resolution range of the PWM modulation, and thus PWM modulation can be performed even when the driving voltage signal has a high frequency. Noise-shaping modulation reduces the level of quantum noise near the low frequency range by causing the quantum noise due to digitization, included in the driving voltage signal, to be biased toward the high frequency range side. Of modulation signals with the reduced-gradation level, the components near the high frequency band are cut, while the components near the low frequency range are used to suppress quantum noise and control the driving voltage applied to the motor with a high accuracy. 1. A motor-driving voltage control device that generates a driving voltage signal to be provided to a motor based on a driving command signal , comprising:a low gradation unit that lowers a gradation level of the driving voltage signal and performs noise-shaping modulation in which quantization noise is biased toward a high-frequency range, anda PWM modulator that modulates amplitude of the driving voltage signal to pulse width thereof, the driving voltage signal having a low gradation level generated in the low gradation unit, wherein the low gradation unit:causes the gradation level of the driving voltage signal to be lower to such a level that falls within a resolution range of the PWM modulator.2. The motor-driving voltage control device according to claim 1 , wherein the low gradation unit:causes frequency components of quantization ...

HOPPER SPREADER WITH BACK EMF CONTROL AND HOPPER SYSTEM SPEED CONTROL

A method of controlling a DC motor that includes the step of providing a pulse-width modulation (PWM) signal to the DC motor. The PWM signal provides a voltage to operate the DC motor. The method also includes the steps of measuring a voltage generated by the DC motor when the PWM signal is off. In more particular embodiments, the method includes measuring a current being supplied to the DC motor when the PWM signal is off. The method may further require determining a motor speed of the DC motor based on the measured voltage. The method further includes controlling the DC motor to maintain a relatively constant motor speed with varying loads on the DC motor. 1. A method of controlling a DC motor of a hopper spreader , the method comprising the steps of:providing a pulse-width modulated (PWM) signal to operate the DC motor;measuring a voltage generated by the DC motor when the PWM signal is turned off;determining a motor speed of the DC motor based on the measured voltage;controlling the DC motor to maintain a relatively constant motor speed which corresponds to a desired motor speed setting, the relatively constant motor speed being maintained with varying loads placed on the DC motor.2. The method of claim 1 , wherein controlling the DC motor to maintain the relatively constant motor speed comprises controlling the PWM signal to increase the voltage to the DC motor as the load on the DC motor increases claim 1 , and to decrease the voltage to the DC motor as the load on the DC motor decreases.3. The method of claim 1 , wherein measuring the voltage comprises measuring the voltage using a microprocessor.4. The method of claim 3 , wherein measuring the voltage using a microprocessor comprises measuring the voltage using a microprocessor with an integral analog-to-digital converter.5. The method of claim 1 , further comprising measuring the current supplied to the DC motor when the PWM signal is turned off.6. The method of claim 5 , wherein the voltage and current ...

A CONTROL SYSTEM FOR AN ELECTRIC MOTOR

A control system for an electric motor, the control system comprising a first control device arranged to control an operation of a first component of the electric motor; a second control device arranged to control an operation of a second component of the electric motor, wherein the first control device is arranged to transmit to the second control device a first signal for indicating the transmission of data over a first communication link to the second control device, wherein the second control device is arranged to use the timing of the first signal to synchronise the operation of the second component with the operation of the first component. 1. A control system for an electric motor , the control system comprising a first control device arranged to control an operation of a first component of the electric motor; a second control device arranged to control an operation of a second component of the electric motor , wherein the first control device is arranged to transmit to the second control device a first signal for indicating the transmission of data over a first communication link to the second control device , wherein the second control device is arranged to use the timing of the first signal to synchronise the operation of the second component with the operation of the first component.2. A control system according to claim 1 , wherein the first component is a first inverter for controlling current flow in a first coil set of the electric motor.3. A control system according to claim 1 , wherein the second component is a second inverter for controlling current flow in a second coil set of the electric motor.4. A control system according to claim 3 , wherein the first communication link is a serial peripheral interface bus.5. A control system according to claim 4 , wherein the first signal is a chip select signal.6. A control system according to claim 3 , wherein the operation of the first inverter and second inverter is controlled using pulse width modulation ...

Pwm rectifier for motor drive connected to electric storage device

A PWM rectifier includes a main circuit unit which performs a power conversion on the basis of a PWM control signal, a DC voltage loop control unit which generates a current command, a current command restriction unit which sets, when an absolute value of the current command exceeds a limit value, the limit value as a final current command, and otherwise sets the current command as the final current command, a DC voltage loop saturation determination unit which determines a saturation state when the final current command is set to the limit value and otherwise determines as a non-saturation state, a DC voltage command calculation unit which changes the DC voltage command into a value obtained by adding an offset to a minimum or maximum value of the DC voltage value, and a PWM control signal generation unit which generates the PWM control signal from the final current command.

ELECTROMAGNETIC LINEAR ACTUATOR

A linear actuator comprising a first fixed portion comprising a linear array of stator teeth, each surrounded by one or more turns of electrical wire, a controller which generates a set of currents that are applied to phase windings of the first fixed portion to generate a pattern of magnetic poles along the array of stator teeth, a spacing between the magnetic poles being larger than a spacing between adjacent stator teeth of the first fixed portion, a second fixed portion that comprises an alternating set of magnet poles, a spacing between adjacent poles being smaller than the spacing of the magnetic poles of the first fixed portion created by the controller, and a movable output portion that comprises a linear array of pole pieces that extend along a length of the moveable output portion that is greater than a stroke length of the actuator and longer than a length of the fixed portion, whereby in use a length of the movable output portion is at all times located between the first and second fixed portions, in which the pole pieces that are located between the first and second fixed portions shape a magnetic flux acting between the magnetic poles of the first fixed portion and the magnet poles of the second fixed portion, and whereby in use the controller is arranged to cause linear movement of the moveable output portion by moving the magnetic poles of the first fixed portion along the first array. 1. A linear actuator comprising:a first fixed portion comprising a linear array of stator teeth, each surrounded by one or more turns of electrical wire,a controller which generates a set of currents that are applied to phase windings of the first fixed portion to generate a pattern of magnetic poles along the array of stator teeth, a spacing between the magnetic poles being larger than a spacing between adjacent stator teeth of the first fixed portion,a second fixed portion that comprises an alternating set of magnet poles, a spacing between adjacent poles being ...

METHOD FOR EMULATING A THREE-PHASE BRUSHLESS DC MOTOR USING A LOAD EMULATOR

A method for emulating a three-phase, brushless DC motor using a load emulator that is connected in a three-phase manner via load terminals to supply terminals of a motor control unit. The load emulator has emulator power electronics and an emulator control unit for controlling the emulator power electronics. The emulator control unit determines the supply terminals that are actuated by the motor control unit and the supply terminals that are not actuated, and the emulator power electronics are actuated by the emulator control unit in such a way that phase currents calculated by the emulator control unit on the basis of a motor model flow in the supply terminals that are actuated by the motor control unit and a phase voltage calculated by the emulator control unit on the basis of a motor model is applied to the supply terminal that is not actuated by the motor control unit. 1. A method for emulating a three-phase brushless DC motor using a load emulator , the method comprising:connecting the load emulator in a three-phase manner via its load terminals to supply terminals of a motor controller, the load emulator having emulator power electronics and an emulator controller for controlling the emulator power electronics;determining, via the emulator controller, the supply terminals that are driven by the motor controller and the supply terminals that are not driven, the emulator power electronics being driven by the emulator controller such that phase currents calculated by the emulator controller based on a motor model flow in the supply terminals that are driven by the motor controller;applying a phase voltage calculated by the emulator controller based on the motor model to the supply terminal that is not driven by the motor controller;detecting a transition of the supply terminal of the motor controller from a non-driven state to a driven state when a magnitude of a difference voltage between the output voltage measured at the supply terminal of the motor ...

METHOD FOR OPERATING AN ELECTRICAL MACHINE AND ELECTRICAL MACHINE

A method for operating an electric machine with a power source, an electric motor, and an intermediary power converter, in which an input current of the power source is converted to a multi-phase output current for the electric motor by a pulse width modulated control of a number of semiconductor switches of the converter, wherein the or each pulse is generated at a first point in time and terminated after a pulse duration at a second point in time, in which for each alternating current component, which is generated in the course of the pulse-width-modulated driving of the semiconductor switches in an intermediate circuit of the power source, a frequency spectrum is determined, and in which the pulse durations of the pulses of the pulse width modulated control can be set such that the sum of the frequency spectra of the alternating current components is minimal. 1. A method for operating an electric machine with a power source , an electric motor , and an intermediary power converter , the method comprising:converting an input current of the power source into a multi-phase output current for the electric motor via a pulse width modulated control of a number of semiconductor switches of the converter, wherein the or each pulse is generated at a first point in time and terminated after a pulse duration at a second point in time;determining a frequency sprectrum for each alternating current component generated in a course of the pulse-width-modulated driving of the semiconductor switches in an intermediate circuit of the power source; andsetting the pulse durations of the pulses of the pulse width modulated control such that a sum of the frequency spectra of the alternating current components is minimal.2. The method according to claim 1 , wherein in order to minimize the sum of the frequency spectra claim 1 , these are phase-shifted by 180° to each other.3. The method according to claim 1 , wherein the pulse durations are set for a particular frequency or a frequency ...

MOTOR CONTROL APPARATUS AND MOTOR UNIT

A motor control apparatus that controls a brushless motor which operates a wiper arm so as to swing, the motor control apparatus including: a position detection part that detects a rotation position of a rotor; and a control part that performs a sine wave drive of the brushless motor at a time of a low output mode in which an output of the brushless motor is low and that, at a time of a high output mode in which an output is higher than an output at the time of the low output mode, allows a power distribution angle to be an angle that is larger than 120 degrees and distributes power to the brushless motor at a timing when a predetermined electric angle is advanced with reference to the rotation position of the rotor. 1. A motor control apparatus that controls a brushless motor which operates a wiper arm so as to swing , the motor control apparatus comprising:a position detection part that detects a rotation position of a rotor; anda control part that performs a sine wave drive of the brushless motor at a time of a low output mode in which an output of the brushless motor is low and that, at a time of a high output mode in which an output is higher than an output at the time of the low output mode, allows a power distribution angle to be an angle that is larger than 120 degrees and distributes power to the brushless motor at a timing when a predetermined electric angle is advanced with reference to the rotation position of the rotor.2. The motor control apparatus according to claim 1 ,wherein the power distribution angle is an electric angle and is in a range of 120 degrees to 180 degrees.3. The motor control apparatus according to claim 1 ,wherein the control part performs a rectangular wave drive of the brushless motor at the time of the high output mode.4. The motor control apparatus according to claim 1 ,wherein the low output mode is a mode in which the wiper arm is operated so as to swing at a preset speed, andthe high output mode is a mode in which the wiper ...

CONTROL APPARATUS FOR POWER STEERING APPARATUS AND POWER STEERING APPARATUS USING THE SAME

Provided is a control apparatus for a power steering apparatus, and a power steering apparatus using it that can reduce electromagnetic noise with the aid of a spread spectrum, thereby realizing stabilized motor control. The control apparatus for the power steering apparatus includes a PWM carrier period setting portion configured to set a natural number of PWM carrier periods within one period of a control period and also changeably set a length of the PWM carrier period, a motor current detection execution portion configured to detect a motor current during the control period, a motor rotational angle detection execution portion configured to detect a motor rotational angle during the control period, and an execution timing setting portion configured to set a timing at which the motor current is detected by the motor current detection execution portion or a timing at which the motor rotational angle is detected by the motor rotational angle detection execution portion, based on the control period set by the control period setting portion. 1. A control apparatus for a power steering apparatus , the control apparatus being configured to drive and control a brushless motor configured to provide a steering force to a steering mechanism configured to turn a turning target wheel according to a steering operation performed on a steering wheel , the control apparatus comprising:a current instruction value calculation portion configured to calculate a current instruction value directed to the brushless motor according to a driving condition of a vehicle;a voltage instruction value calculation portion configured to calculate a voltage instruction value directed to the brushless motor based on the current instruction value;a PWM control portion configured to output a PWM duty signal to each phase of the brushless motor according to the voltage instruction value;a bridge circuit including a switching circuit configured to be driven and controlled by the PWM duty signal, the ...

ENERGY SAVING METHOD FOR USE WITH ACTIVE PWM RECTIFIERS IN REGENERATIVE DRIVES

As described herein, a drive circuit for a three phase AC motor comprises an AC/AC converter. The converter has an input for receiving multiphase AC power from an AC source and converting the AC power to variable voltage and variable frequency from the AC source for driving the AC motor. A filter circuit is connected to the AC/AC converter and comprises at least one inductor per phase and at least one capacitor per phase. The capacitors are connected in a broken wye configuration with one side connected to one of the inductors and an opposite side connected via a three phase diode bridge rectifier to a switch. The switch is controlled by a converter control to selectively open or short a neutral point of the broken wye capacitor configuration. 1. A drive circuit for a three phase AC motor comprising:an AC/AC converter having an input for receiving multi phase AC power from an AC source and converting the AC power to variable voltage and variable frequency from the AC source for driving the AC motor;a filter circuit connected to the AC/AC converter and comprising at least one inductor per phase and at least one capacitor per phase, the capacitors connected in a broken wye configuration with one side connected to one of the phases and an opposite side connected via a three phase diode bridge rectifier to a switch, the switch being controlled by a converter control to selectively open or short a neutral point of the broken wye capacitor.2. The drive circuit for a three phase AC motor of wherein the switch is turned off if the converter is not in a run mode.3. The drive circuit for a three phase AC motor of wherein the switch provides a select power loss for damping.4. The drive circuit for a three phase AC motor of wherein the filter circuit comprises a damping resistor between the switch and a DC side of the diode bridge.5. The drive circuit for a three phase AC motor of wherein the filter is connected between the AC source and the AC/AC converter.6. The drive circuit ...

DRIVE DEVICE, TRANSPORT APPARATUS, AND ENERGY STORAGE CONTROL METHOD

A second energy storage is superior to a first energy storage in energy to weight density and inferior to the first energy storage in power to weight density. A booster is to boost a first voltage output from the first energy storage. A motor is to be driven by power output from at least one of the first energy storage and the second energy storage. A controller is to control the booster to operate in a first mode while a voltage point is within a referenced closed region and to operate in a second mode while the voltage point is outside the referenced closed region. The voltage point represents a relationship between the first voltage and a second voltage output from the second energy storage in a two-dimensional coordinate system having a first axis representing the first voltage and having a second axis representing the second voltage. 1. A drive device comprising:a first energy storage;a second energy storage which is superior to the first energy storage in energy to weight density and inferior to the first energy storage in power to weight density;a booster to boost a first voltage output from the first energy storage;a motor to be driven by power output from at least one of the first energy storage and the second energy storage; anda controller to control the booster to operate in a first mode while a voltage point is within a referenced closed region and to operate in a second mode while the voltage point is outside the referenced closed region, the voltage point representing a relationship between the first voltage and a second voltage output from the second energy storage in a two-dimensional coordinate system having a first axis representing the first voltage and having a second axis representing the second voltage, the first axis being perpendicular to the second axis.2. The drive device according to claim 1 , wherein while the voltage point is within the referenced closed region claim 1 , power is suppliable from both the first energy storage and the ...

MOTOR CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND VEHICLE

A motor control device includes a motor, a control device, and a motor drive circuit. The motor includes a motor rotor, a motor stator, and a plurality of coil groups divided into a first coil group and a second coil group of at least two systems for each of three phases, and configured to excite a stator core by three-phase alternating currents. In the motor drive circuit, a first motor drive circuit supplies a three-phase AC first motor drive current to the first coil group based on a command value, and a second motor drive circuit supplies a three-phase AC second motor drive current having a phase difference from a phase of the first motor drive current, to the second coil group. 1. A motor control device comprising: a motor rotor;', 'a motor stator including a stator core that rotates the motor rotor; and', 'a plurality of coil groups divided into a first coil group and a second coil group of at least two systems for each of three phases, and configured to excite the stator core by three-phase alternating currents; and, 'a motor including a control device that outputs a current value as a command value for rotating and driving the motor rotor;', 'a first motor drive circuit that supplies a three-phase AC first motor drive current to the first coil group, based on the command value; and', 'a second motor drive circuit that supplies a three-phase AC second motor drive current having a phase difference from a phase of the first motor drive current, to the second coil group, wherein, 'a motor drive circuit includingthe phase difference does not exceed 45° in electrical angle,the stator core includes an annular back yoke, and a plurality of teeth arranged side by side in a circumferential direction on an inner circumferential surface of the back yoke,when n is an integer, the 3n first coil groups are arranged in the circumferential direction of the stator core at regular intervals, each of the first coil groups being constituted of a plurality of first coils that are ...

EMI reduction in PWM inverters using adaptive frequency modulated carriers

A controller is provided for generating carrier signals for a PWM generator controlling an inverter driving an electric actuator to reduce the EMI level of the inverter. The controller includes an interface configured to connect to the inverter, a memory configured to store a measured electromagnetic-interference (EMI) spectrum, a desired EMI spectrum and an EMI suppression rate program, and a processor. The processor is, in connection with the memory, configured to computing EMI suppression rates for a frequency range, wherein the EMI suppression determined adaptively by the measured EMI spectrum and the desired EMI spectrum, computing sweep duration of discrete frequency, wherein the sweep duration is determined by the EMI suppression rate of the discrete frequency, and a modulator configured to modulate the carrier signals based on the sweep durations of carrier frequencies and to transmit the modulated carrier signals to the PWM generator to generate PWM signals for the inverter.

Vibration motor controller, and lens apparatus and image pickup apparatus that include the same

A vibration motor controller controls driving velocity of a vibration motor relatively moving a vibrator and a contactor contacting the vibrator, the vibrator oscillated by an electromechanical energy transducer to which first and second frequency signals having a phase difference are applied, and includes a phase difference determiner storing a relationship between the frequency and phase difference between the first and second frequency signals, and determines the phase difference with respect to the frequency based on the relationship, and a controller controlling velocity of the vibration motor based on the frequency of the first and second frequency signals and the phase difference determined by the phase difference determiner based on the frequency. The relationship between the frequency and phase difference in the phase difference determiner does not include a relationship between frequency lower than a resonance frequency in frequency-velocity characteristics of the vibration motor, and the phase difference.

CONTROL APPARATUS FOR AC MOTOR

A current controller calculates a drive signal by means of fundamental wave current control and high-order current control, for driving an inverter. A 5order/7order voltage command calculation section calculates a 5order/7order voltage command vector Vd*, Vq* by means of feedback control which makes a high-order dq transformation value extracted from the actual current coincide with a 5order/7order current command value Id*, Iq*. A 5order/7order vector transformation section executes high-order vector transformation processing on the 5order/7order voltage command vector Vd*, Vq* that is calculated by the 5order/7order voltage command calculation section, with the high-order vector transformation processing being executed such as to make a high-order voltage vector and a high-order current vector coincide in phase in high-order dq coordinates, and with the high-order vector transformation processing including rotation transformation by high-order vector rotation which rotates a high-order vector. 1. An AC motor control apparatus , comprising:an inverter which supplies, to a polyphase AC motor, AC power that has been converted by a plurality of switching elements; anda current controller which calculates drive signals for driving the inverter and controls driving of the AC motor, through fundamental wave current control that makes a 1st-order component of an actual current, which is fed back, coincide with a fundamental wave current command vector in dq coordinates, and through high-order current control that makes one or more specific high-order components, extracted from the actual feedback current, coincide with a high-order current command vector in high-order dq coordinates, whereinthe current controller includes:a high-order voltage command calculation section that calculates a high-order voltage command vector by means of feedback control which causes a high-order transformation value of a high-order component having a specific order, extracted from the actual ...

ELECTRIC POWER ADJUSTMENT SYSTEM AND CONTROL METHOD FOR ELECTRIC POWER ADJUSTMENT SYSTEM

An electric power adjustment system includes a fuel cell connected to a load, and a multi-phase converter connected between the fuel cell and the load. The multi-phase converter is constituted of a plurality of phases and converts an output voltage from the fuel cell by a predetermined required voltage ratio. The electric power adjustment system includes a ripple current characteristic switching unit configured to switch a ripple current characteristic with respect to an input current to the multi-phase converter by changing at least one of a drive phase number and the voltage ratio of the multi-phase converter according to an operation state of the fuel cell and a required electric power of the load. 18.-. (canceled)9. An electric power adjustment system , comprising:a fuel cell connected to a load;a multi-phase converter connected between the fuel cell and the load, the multi-phase converter being constituted of a plurality of phases, the multi-phase converter converting an output voltage from the fuel cell by a predetermined required voltage ratio; anda ripple current characteristic switching unit configured to switch a ripple current characteristic with respect to an input current to the multi-phase converter so as to become a smallest ripple current by changing at least one of a drive phase number and the voltage ratio of the multi-phase converter according to an operation state of the fuel cell and a required electric power of the load.10. The electric power adjustment system according to claim 9 , wherein:the multi-phase converter has a phase number of three or more, andthe ripple current characteristic switching unit is configured to switch the ripple current characteristics so as to reduce the ripple current with respect to the voltage ratio of the input and output voltages of the multi-phase converter by switching the drive phase number of the multi-phase converter on the basis of the output voltage from the fuel cell and a required voltage ratio of the ...

DC CONSTANT-SPEED BRUSHLESS FAN MOTOR HAVING WIDE VOLTAGE INPUT

A direct current (DC) constant-speed brushless fan motor having a wide voltage input, comprising a power supply unit; a fan motor driving unit, connected to the power supply unit; a fan motor, connected to the fan motor drive unit; a fan motor control unit, connected to the fan motor; and a sensing unit, connected to the fan motor control unit. As such, the power supply unit may be used to accept a wide voltage input and convert the wide input voltage into an appropriate output power, so that the appropriate output power may be outputted to the brushless fan motor through the fan motor control unit and the fan motor drive unit. As such, the fan motor may reach a target rotational speed which may not be changed with the input voltage, with the efficacies of saved consumed energy and elimination of operation noise achieved simultaneously. 1. A direct current (DC) constant-speed brushless fan motor having a wide voltage input , comprising:a DC-DC power supply unit;a fan motor drive unit, connected to the power supply unit and wherein the power supply unit outputs a constant current, a constant voltage, or a constant power to the fan motor drive unit;a fan motor, connected to the fan motor drive unit;a fan motor control unit, connected to the fan motor drive unit;a sensing unit, connected to the fan motor control unit,a power output modulation unit, anda hot plugging unit.2. The DC constant-speed brushless fan motor having the wide voltage input as claimed in claim 1 , wherein the power supply unit claim 1 , the fan motor drive unit claim 1 , the fan motor control unit claim 1 , the sensing unit claim 1 , the power output modulation unit claim 1 , and the hot plugging unit are disposed on a circuit board claim 1 , and the circuit board is disposed within the brushless fan motor.3. (canceled)4. The DC constant-speed brushless fan motor having the wide voltage input as claimed in claim 1 , wherein one of the power supply unit and the hot plugging circuit is further ...

DRIVE DEVICE, ENERGY STORAGE CONTROL METHOD FOR DRIVE DEVICE, AND TRANSPORT APPARATUS

A motor is to be driven with power supplied from at least one of a first energy storage and a second energy storage. The booster is to boost a first voltage output from the first energy storage such that the first voltage and a second voltage output from the second energy storage satisfy a first condition, a second condition, and a third condition. In the first condition, the second voltage does not exceed a withstand voltage limit of the motor. In the second condition, the second voltage is lower than or equal to a maximum boosted value to which the booster boosts the first voltage with a maximum boosting ratio. In the third condition, the second voltage is higher than or equal to a minimum boosted value to which the booster boosts the first voltage with a minimum boosting ratio. 1. A drive device comprising:a first energy storage;a second energy storage superior to the first energy storage in energy to weight density and inferior to the first energy storage in power to weight density;a boosting unit configured to boost an output voltage of the first energy storage to perform power distribution control; anda motor driven by power obtained from at least one of the first energy storage and the second energy storage,wherein in a two-dimensional coordinate system using a voltage of the first energy storage and a voltage of the second energy storage as variables, a voltage point representing a relationship between the voltage of the first energy storage and the voltage of the second energy storage is within a region that satisfies all the following conditions:a first condition which is that the voltage of the second energy storage does not exceed a withstand voltage limit of the motor;a second condition which is that the voltage of the second energy storage is lower than or equal to a value obtained by the boosting unit by multiplying the voltage of the first energy storage by a maximum boosting ratio; anda third condition which is that the voltage of the second energy ...

MOTOR DRIVE APPARATUS HAVING FUNCTION OF SUPPRESSING TEMPORAL VARIATION OF REGENERATIVE CURRENT

A motor drive apparatus comprises: a converter which converts DC power into AC power and returns the AC power to an AC power supply; a 120-degree conduction regenerative power control unit which controls the converter using a 120-degree conduction method so that the power recovered through the converter is returned to the AC power supply; a PWM regenerative power control unit which controls the converter using a PWM control method so that the power is returned to the AC power supply; an input voltage detection unit which detects a supply voltage supplied to the converter; a DC link voltage detection unit which detects a DC link voltage; and a regenerative method switching unit which, during power regeneration, performs switching between the 120-degree conduction method and the PWM control method in accordance with a given criterion, based on a voltage value detected by the DC link voltage detection unit. 1. A motor drive apparatus comprising:a converter configured to convert DC power into AC power and returns the AC power to an AC power supply;a 120-degree conduction regenerative power control unit configured to control the converter using a 120-degree conduction method so that the power recovered through the converter is returned to the AC power supply;a PWM regenerative power control unit configured to control the converter using a PWM control method so that the power recovered through the converter is returned to the AC power supply;an input voltage detection unit configured to detect a supply voltage being supplied from the AC power supply to the converter;a DC link voltage detection unit configured to detect a DC link voltage which is an output voltage of the converter; anda regenerative method switching unit configured to, during power regeneration, perform switching between the 120-degree conduction method and the PWM control method in accordance with a given criterion, based on a voltage value detected by the DC link voltage detection unit.2. The motor drive ...

SYSTEM AND METHOD FOR CONTROLLING MOTOR PARAMETERS

The present disclosure provides a system and a method for controlling motor parameters. The system includes a feedforward processing module performing a linear processing on a control signal according to parameters; a control object module including a DAC digital to analog converter, an amplifying circuit and an ADC analog to digital converter, a control signal processed by the feedforward processing module passing through the DAC digital to analog converter, and amplified by the amplifier circuit, and passing through the ADC analog to digital converter to obtain a voltage vcm[n] and a current icm[n] across the motor; a system identification module including an LMS adaptive filter, a Least mean square filtering performed on an error signal err[n] between a measurement current icm[n] and a prediction current icp[n], results of iteration feed back to the feedforward processing module, and the feedback results applied to the next data acquisitions and parameters calculations. 1. A system for controlling motor parameters , comprising:a feedforward processing module which performs a linear processing on a control signal according to parameters;a control object module, comprising a DAC digital to analog converter, an amplifying circuit and an ADC analog to digital converter, wherein a control signal processed by the feedforward processing module passes through the DAC digital to analog converter, and then is amplified by the amplifier circuit, and then passes through the ADC analog to digital converter to obtain a voltage vcm[n] and a current icm[n] across the motor;a system identification module comprising an LMS adaptive filter, wherein a Least mean square filtering is performed on an error signal err[n] between a measurement current icm[n] and a prediction current icp[n] in the LMS adaptive filter, results of iteration are fed back to the feedforward processing module, and the feedback results are applied to the next data acquisitions and parameters calculations.2. A ...

ELECTRIC POWER STEERING APPARATUS

When detecting an abnormality in a portion related to control of an electric motor, a CPU that calculates a control amount for controlling the electric motor calculates a control amount different from a control amount at a normal time so as to continue the control of the electric motor and changes a threshold value for detecting the abnormality to a value different from a value at a normal time. 16-. (canceled)7. An electric power steering apparatus comprising:an electric motor that produces assist torque, based on steering torque produced by a driver of a vehicle; anda controller that controls the electric motor,wherein the controller includesan input circuit to which information to be utilized to control the electric motor is inputted,an inverter circuit that supplies an electric current to the electric motor,a CPU that calculates a control amount for controlling the electric motor, based on the information inputted to the input circuit, and outputs a command signal based on the control amount, anda driving circuit that drives the inverter circuit, based on the command signal outputted from the CPU, andwherein the CPU has an abnormality control mode in which when detecting an abnormality in a portion related to control of the electric motor, the CPU calculates a control amount that is different at least from a control amount at a normal time, in accordance with the portion in which the abnormality has occurred and the contents of the abnormality, and then continues control of the electric motor; when control of the electric motor is continued in the abnormality control mode, a threshold value for detecting the abnormality is changed to a value different from a value at a normal time, in accordance with the contents of the control in the abnormality control mode.8. An electric power steering apparatus comprising:an electric motor that produces assist torque, based on steering torque produced by a driver of a vehicle; anda controller that controls the electric motor ...

SEMICONDUCTOR DEVICE

A semiconductor device includes a conductive support member, a first semiconductor element, a second semiconductor element, an insulating element, and a sealing resin. The conductive support member includes a first die pad and a second die pad, which are separated from each other in a first direction. The first die pad and the second die pad overlap each other when viewed along the first direction. When viewed along a thickness direction, a peripheral edge of the first die pad has a first near-angle portion including a first end portion in a second direction orthogonal to both the thickness direction and the first direction. The first near-angle portion is separated from the second die pad in the first direction toward the first end portion in the second direction. 1. A semiconductor device comprising:a conductive support member including a first die pad and a second die pad, which are separated from each other in a first direction orthogonal to a thickness direction and have relatively different potentials from each other;a first semiconductor element that is mounted on the first die pad and forms a first circuit together with the first die pad;a second semiconductor element that is mounted on the second die pad and forms a second circuit together with the second die pad;an insulating element that conducts to the first semiconductor element and the second semiconductor element and insulates the first circuit and the second circuit from each other; anda sealing resin that covers the first die pad, the second die pad, the first semiconductor element, the second semiconductor element, and the insulating element and insulates the first die pad and the second die pad from each other,wherein the first die pad and the second die pad overlap each other when viewed along the first direction,wherein when viewed along the thickness direction, a peripheral edge of the first die pad has a first near-angle portion including a first end portion in a second direction orthogonal to ...

ELECTRIC MOTOR DRIVE SYSTEM FOR LOW-VOLTAGE MOTOR

A low-voltage motor is provided that includes a rotor and a stator having two or more phase windings and a number of single-turn coils. Each phase winding comprises a plurality of the single-turn coils connected together. Each of the single-turn coils is a single conductive loop that includes only one conductor on each side of the single-turn coil. 1. An electric motor drive system , comprising:a low-voltage motor comprising:a rotor; anda stator, comprising:two or more phase windings; anda number of single-turn coils, wherein each phase winding comprises a plurality of the single-turn coils connected together, and wherein each of the single-turn coils is a single conductive loop that includes only one conductor on each side of the single-turn coil.2. The electric motor drive system according to claim 1 , further comprising:a motor drive controller configured to control the low-voltage motor, the motor drive controller comprising:a current source inverter, comprising:driver circuitry configured to generate switching commands;a variable current source configured to: generate a variable current that regulates power in the low-voltage motor; andmotor commutation circuitry configured to receive the variable current and switching commands, and to commutate phase currents that are output to the low-voltage motor.3. The electric motor drive system according to claim 2 , wherein the variable current source is configured to: receive digital voltage commands claim 2 , and process the digital voltage commands to cause the variable current source to generate the variable current that is supplied to the motor commutation circuitry to drive the low-voltage motor to operate at a commanded angular velocity.4. The electric motor drive system according to claim 3 , further comprising: a processor claim 3 , andwherein the current source inverter further comprises:a current sensor that is configured to sense and sample phase currents in the low-voltage motor and output a sensed current ...

Bldc motor control system and control method

Provided are a BLDC motor control system and a control method thereof. In more detail, the BLDC motor control system includes: a motor driver 100 driving a brushless DC (BLDC) motor; and a controller 200 sensing an RPM of the BLDC motor to generate a control signal for controlling the BLDC motor, in which the controller 200 may discriminate whether the RPM of the BLDC motor is a high RPM or a low RPM based on a preset reference RPM to generate the control signal.

INVERTER SYSTEM FOR VEHICLE

An inverter system for a vehicle is provided. The system includes an energy storage that stores electrical energy and a first inverter that includes a plurality of first switching devices and converts energy stored in the energy storage into AC power. A second inverter includes a plurality of second switching devices that are different in types from the first switching devices, and is connected to the energy storage in parallel with the first inverter. The second inverter converts the energy stored in the energy storage into AC power. A motor is driven by the AC power converted by the first inverter and the second inverter. A controller generates a PWM signal based on required output of the motor and operates the motor by inputting the generated PWM signal to at least one or more of the first inverter and the second inverter. 1. An inverter system for a vehicle , comprising:an energy storage configured to store electrical energy;a first inverter that includes a plurality of first switching devices and configured to convert energy stored in the energy storage into alternating current (AC) power;a second inverter that includes a plurality of second switching devices that are different in type from the first switching devices, and is connected to the energy storage in parallel with the first inverter, and configured to convert the energy stored in the energy storage into AC power;a motor driven by the AC power converted by the first inverter and the second inverter; anda controller configured to generate a pulse-width modulation (PWM) signal based on required output of the motor and configured to operate the motor by inputting the generated PWM signal to at least one of the first inverter or the second inverter,wherein the first switching devices are silicon carbide-field effect transistors (SiC-FET) and the second switching devices are silicon-insulated gate bipolar transistors (Si-IGBT).2. (canceled)3. The inverter system of claim 1 , wherein the controller is ...

POWER CONVERTER CONTROL DEVICE

In a first period having a first period length, first data and second data are alternately given to an inverter control unit. The first data has a first value indicating a length of time from the start point of time of the first period to a matching point of time as a point of time when a converter carrier takes a converter threshold value and an inverter threshold value corresponding to a second period having the first value as its length. The second data has a second value indicating a length of time from the matching point of time to the end point of time of the first period and an inverter threshold value corresponding to a second period having the second value as its length. 110-. (canceled)11. A power converter control device for controlling a power converter including a converter that performs AC-DC conversion and an inverter that receives a DC voltage from said converter and supplies a multi-phase AC current , said power converter control device comprising:a converter control unit that outputs a converter switching signal for determining switching of said converter based on a result of performing comparison between a converter carrier and a converter threshold value in each of first periods repeated while having a first period length; andan inverter control unit that outputs an inverter switching signal for determining switching of said inverter based on a result of performing comparison between an inverter carrier and an inverter threshold value in each of second periods synchronized with said converter carrier and repeated while having a second period length,wherein, in said first period, first data and second data are alternately given to said inverter control unit, said first data including a first value indicating a length of time from a start point of time of said first period to a matching point of time as a point of time when said converter carrier takes said converter threshold value and said inverter threshold value corresponding to said second ...

SYSTEMS AND METHODS FOR REDUCING DC LINK VOLTAGE DYNAMICS WITH LIMITED ENERGY STORAGE ELEMENT

In an example embodiment, a controller includes a memory having computer-readable instructions stored therein and a processor. The processor is configured to execute the computer-readable instructions to determine a first set of inductance values for at least one load machine and second set of inductance values for a generator machine, determine a first set of gains for the at least one load machine based on the first set of inductance values and a regulator bandwidth, determine a second set of gains for the generator machine based on the second set of inductance values and the regulator bandwidth, and generate voltage commands for driving the at least one load machine and the generator machine based on at least the first and second sets of gains. 1. A controller comprising:a memory having computer-readable instructions stored therein; and determine a first set of inductance values for at least one load machine and a second set of inductance values for a generator machine,', 'determine a first set of gains for the at least one load machine based on the first set of inductance values and a first regulator bandwidth,', 'determine a second set of gains for the generator machine based on the second set of inductance values and the first regulator bandwidth, and', 'generate voltage commands for driving the at least one load machine and the generator machine based on at least the first and second sets of gains., 'at least one processor configured to execute the computer-readable instructions to,'}2. The controller of claim 1 , wherein the at least one processor is configured to execute the computer-readable instructions to claim 1 ,determine a first set of voltage and current values for the at least one load machine and a second set of voltage and current values for the generator machine,determine the first set of inductance values based on the first set of voltage and current values, anddetermine the second set of inductance values based on the second set of voltage and ...

SYSTEM AND METHOD FOR CAPACITOR FAULT ENERGY INTERRUPTION IN ADJUSTABLE SPEED DRIVES

An adjustable speed drive (ASD) circuit includes a rectifier bridge to convert an AC power input to a DC power, a DC link coupled to the rectifier bridge to receive the DC power, a DC link capacitor bank comprising at least first and second capacitors connected to the DC link, each capacitor having a capacitor voltage thereacross, and a protection circuit including a detection circuit configured to detect a short circuit on one or more of the first and second capacitors of the DC link capacitor bank and generate an action signal upon detection of a short circuit on one or more of the first and second capacitors of the DC link capacitor bank. The ASD circuit also includes an action circuit in operable communication with the detection circuit and configured to cause a short circuit across the DC link upon receiving the action signal from the detection circuit. 1. An adjustable speed drive (ASD) circuit comprising:an input connectable to an AC source;a rectifier bridge connected to the input to convert an AC power input to a DC power;a DC link coupled to the rectifier bridge to receive the DC power therefrom;a DC link capacitor bank comprising at least first and second capacitors connected to the DC link, each capacitor of the DC link capacitor bank having a capacitor voltage thereacross; and [ detect a short circuit on one or more of the first and second capacitors of the DC link capacitor bank; and', 'generate an action signal upon detection of a short circuit on one or more of the first and second capacitors of the DC link capacitor bank; and, 'a detection circuit configured to, 'an action circuit in operable communication with the detection circuit and configured to cause a short circuit across the DC link upon receiving the action signal from the detection circuit., 'a protection circuit comprising2. The ASD circuit of wherein the detection circuit comprises:a first opto-coupler operably connected to the first capacitor; anda second opto-coupler operably connected ...

METHOD FOR ACQUIRING CONSTANT TORQUE OF ELECTRONICALLY COMMUTATED MOTORS

A method for acquiring a constant torque of an ECM, the method including: A) acquiring a target torque value T0 input from external; B) when the motor is in a non-use state, operating the motor and acquiring an initial rotational speed rpm by the microprocessor; and when the motor is in an operating state, acquiring a current rotational speed rpm by the microprocessor; C) calculating a corresponding target bus current value Itad by the microprocessor using the function of a DC bus current Itad=F(T, rpm) according to the target torque T0 and acquired rotational speed rpm, in which T represents a torque value output by the motor; and D) comparing the target bus current Itad with a real-time bus current Ibus by the microprocessor in a closed-loop control according to the detected real-time bus current Ibus. 1. A method for acquiring a constant torque of an electronically commutated motor , a) a stator assembly,', 'b) a rotor assembly,', 'c) a housing assembly, and', 'd) a motor controller, the motor controller comprising: a microprocessor, an inverter circuit, and an operation parameter detecting circuit;, 'the electronically commutated motor comprisingthe operation parameter detecting circuit being configured to input operation parameters of the motor to the microprocessor; the microprocessor operating to output a pulse width modulation signal having a certain duty ratio to control the inverter circuit; and the inverter circuit operating to control operation of coil winding in each phase of the stator assembly; [{'b': '0', 'A) acquiring a target torque value T input from external;'}, 'B) when the motor is in a non-use state, operating the motor and acquiring an initial rotational speed rpm by the microprocessor; and when the motor is in an operating state, acquiring a current rotational speed rpm by the microprocessor;', {'b': '0', 'C) calculating a corresponding target bus current value Itad by the microprocessor using a function of a DC bus current Itad=F(T, rpm) ...

POWER LIMITING FOR MOTOR CURRENT CONTROLLERS

A motor controller a pulse-width modulation (PWM) circuit, a power limit circuit, and an inverter. The PWM circuit is configured to output initial count outputs based on a current command. The power limit circuit includes a peak current detector, a divider, and a dynamic limiter. The power limit circuit is configured to provide updated count outputs based on the initial count outputs, a sensed current, and a power threshold. The inverter is controlled by the updated count outputs and configured to provide output power to a motor. The sensed current is sensed from the output power to the motor. 1. A motor controller comprising:a pulse-width modulation (PWM) circuit configured to output initial count outputs based on a current command;a power limit circuit configured to provide updated count outputs based on the initial count outputs, a sensed current, and a power threshold; andan inverter controlled by the updated count outputs and configured to provide output power to a motor;wherein the sensed current is sensed from the output power to the motor.2. The motor controller of claim 1 , wherein the power limit circuit comprises:a peak current detector configured to output a peak current value based on the sensed current;a divider configured to divide the power threshold by the peak current value to generate a voltage limit; anda dynamic limiter configured to generate the updated count outputs based on the voltage limit and the initial count inputs.3. The motor controller of claim 2 , wherein the power limit circuit further comprises a count converter that generates a maximum count value based on the voltage limit claim 2 , wherein the dynamic limiter generates the updated count outputs based on the maximum count value.4. The motor controller of claim 3 , wherein the power limit circuit further comprises a proportional-integral control configured to limit a change rate of the maximum count value.5. The motor controller of claim 4 , wherein the power limit circuit further ...

CAMERA MODULE ACTUATOR

A camera module actuator is described including a magnet, a coil disposed to face the magnet, and a driver configured to apply a driving signal to the coil to move the magnet. The camera module actuator also includes a detector configured to detect a position of the magnet from a change in inductance of the coil, based on the movement of the magnet. 1. A camera module actuator , comprising:a magnet;a coil disposed to face the magnet;a driver configured to apply a driving signal to the coil to move the magnet; anda detector configured to detect a position of the magnet from a change in inductance of the coil based on the movement of the magnet.2. The camera module actuator of claim 1 , wherein the inductance of the coil varies based on a strength of a magnetic field of the magnet.3. The camera module actuator of claim 1 , wherein the detector comprises a resonant frequency detecting circuit including a capacitor claim 1 , which forms a resonant tank together with the coil claim 1 , anda resonant frequency of the resonant tank is determined based on the inductance of the coil.4. The camera module actuator of claim 3 , wherein the resonant frequency detecting circuit further comprises a detection signal generator configured to apply a detection signal to the resonant tank.5. The camera module actuator of claim 4 , wherein the detection signal comprises a sinusoidal wave of which a frequency is varied in a predetermined range.6. The camera module actuator of claim 4 , wherein the detector further comprises a resonant frequency calculator configured to calculate the resonant frequency of the resonant tank.7. The camera module actuator of claim 6 , wherein the resonant frequency calculator is further configured to calculate the resonant frequency using a gain value corresponding to a ratio of an output voltage of the resonant tank to a voltage of the detection signal.8. The camera module actuator of claim 7 , wherein the resonant frequency calculator is further configured ...

POWER CONVERSION DEVICE, ROTATING MACHINE SYSTEM USING SAME, AND DIAGNOSIS METHOD FOR SAME

A power conversion device according to the present invention is connected to a rotating machine comprising an armature coil and supplies and receives power. The power conversion device has a function for: collectively applying voltage pulses to the armature coil or coils for one or more specific phases of the rotating machine, sampling the current values of the specific phases from the start of the rising or falling of the voltage pulses until a designated delay time, detecting variation in the capacitance of an insulation member of the armature coils of the specific phases of the rotating machine from variation from a normal state of the current values, and diagnosing insulation degradation. 1. A power conversion device that is connected to a rotating machine including an armature coil to transmit and receive a power , the device having a function of collectively applying voltage pulses to the armature coil having a single specific phase or a plurality of specific phases in the rotating machine , sampling a value of a current of the specific phase after a designated delay time from the start of rising or falling of the voltage pulse , detecting a change in a capacitance of an insulation member of the armature coil having the specific phase in the rotating machine by a change in the value from a normal state , and diagnosing insulation degradation.2. The power conversion device according to claim 1 , wherein the value of the current is sampled once whenever the voltage pulse rises or falls once or multiple times.3. The power conversion device according to claim 1 , wherein the sampling of the value of the current includes sampling in which a delay time from the start of the rising or falling of the voltage pulse is different.4. The power conversion device according to claim 1 , wherein claim 1 , after the value of the current is sampled claim 1 , a peak value of ringing is extracted claim 1 , and the extracted peak value is used for the diagnosis.5. The power ...

Rotor for a Synchronous Machine

A rotor for a synchronous machine of a motor vehicle includes an excitation coil configured to generate a magnetic field necessary for rotation of the rotor in a stator of the synchronous machine. The rotor also includes a supply circuit, to which energy is fed contactlessly such that the supply circuit supplies the excitation coil with the energy. The rotor also includes a demagnetization circuit configured to demagnetize the excitation coil, which, upon collapse of the energy supply of the excitation coil, diverts a current flowing through the excitation coil into a circuit branch in which at least one component for demagnetization is arranged, wherein the at least one component is also configured to perform a protection function to protect the supply circuit against an induced voltage generated at the excitation coil. 1. A rotor for a synchronous machine of a motor vehicle , wherein the rotor comprises:an excitation coil configured to generate a magnetic field necessary for rotation of the rotor in a stator of the synchronous machine;a supply circuit, to which energy is fed contactlessly such that the supply circuit supplies the excitation coil with the energy; anda demagnetization circuit configured to demagnetize the excitation coil, which, upon collapse of the energy supply of the excitation coil, diverts a current flowing through the excitation coil into a circuit branch in which at least one component for demagnetization is arranged,whereinthe at least one component is also configured to perform a protection function to protect the supply circuit against an induced voltage generated at the excitation coil.2. The rotor as claimed in claim 1 , whereinthe at least one component performs the protection function to protect the supply circuit against the induced voltage during a supply of energy to the excitation coil by the supply circuit and also upon or after a collapse of the supply of energy to the excitation coil by the supply circuit.3. The rotor as claimed ...

METHOD AND DEVICE FOR CONTROLLING AN ELECTRIC MOTOR

A method and a device for controlling an electric motor using pulse-width modulated control signals. Control pulses having a setpoint duty factor and temporally varying pulse widths and pulse spacing are generated in the process, the temporally varying pulse widths and pulse spacing being selected as a function of a load and/or thermal loading of the electric motor and/or its control device. 115-. (canceled)16. A method for controlling an electric motor using pulse-width modulation , the method comprising:generating control pulses having a setpoint duty factor and temporally varying pulse widths and pulse spacing;varying the pulse widths and the pulse spacing so that a sound emission spectrum generated by the control of the electric motor using the control pulses is approximated to a spectrum of ambient noise; andcontrolling the electric motor using the control pulses, wherein the temporally varying pulse widths and pulse spacing are generated as a function of at least one of a load of the electric motor and a thermal loading of a control device of the electric motor;wherein a minimum period duration and a maximum period duration are specified as a function of at least one of the load of the electric motor and of the thermal loading of the control device, andwherein an operating state is taken into account when selecting the pulse-width modulation frequency.17. The method of claim 16 , wherein the minimum period duration is specified so that it increases with at least one of a rising load of the electric motor and a thermal loading of the control device claim 16 , and wherein the maximum period duration is specified so that it increases with at least one of a rising load of the electric motor and a thermal loading of the control device.18. The method of claim 17 , further comprising:implementing a sound-frequency analysis of ambient noise to obtain a sound-emission spectrum of the environment;wherein the variation of the pulse widths and the pulse spacing occurs as ...

DRIVING APPARATUS FOR ELECTRIC MOTOR

A driving apparatus for driving an electric motor, such as a synchronous motor or an induction motor, and more particularly to a driving apparatus which performs a vector control based on an output current of an inverter. The driving apparatus of the present invention includes an inverter, a current detector configured to detect an output current of the inverter, and a vector controller configured to transform the output current, detected by the current detector, into a torque current and a magnetization current and to control the torque current and the magnetization current. The vector controller includes a target-output-voltage determination section configured to determine a target output voltage from the torque current, the magnetization current, an angular velocity of the rotor, and motor constants, and a target-magnetization-current determination section configured to determine a magnetization-current command value based on a deviation between the torque-voltage command value and the target output voltage. 1. A driving apparatus for an electric motor , comprising:an inverter;a current detector configured to detect an output current of the inverter; anda vector controller configured to transform the output current, detected by the current detector, into a torque current and a magnetization current, and to control the torque current and the magnetization current, a three-to-two phase transformation section configured to transform three-phase currents, detected by the current detector, into two-phase currents;', 'a stationary-to-rotational coordinate transformation section configured to transform the two-phase currents on a stationary coordinate system, which have been transformed by the three-to-two phase transformation section, into a torque current and a magnetization current on a rotating coordinate system;', 'a torque-voltage control section configured to determine a torque-voltage command value based on a deviation between a torque-current command value and ...

MOTOR DRIVING APPARATUS AND HOME APPLIANCE INCLUDING THE SAME

The present invention relates to a motor driving apparatus and a home appliance including the same. A motor driving apparatus according to an embodiment of the present invention includes an inverter for converting a DC voltage of a DC-link capacitor into an AC voltage according to a switching operation and outputting the converted AC voltage to a motor; a DC-link resistor disposed between the DC-link capacitor and the inverter; and a controller for controlling the inverter based on a phase current sampled through the DC-link resistor, wherein the controller estimates a phase current based on the phase current sampled through the DC link resistor, in an interval in which phase current detection is not possible. Thereby, the phase current flowing through the motor may be accurately calculated using the DC link resistor. 1. A motor driving apparatus comprising:an inverter to convert a DC voltage of a DC-link capacitor into an AC voltage ;a DC-link resistor disposed between the DC-link capacitor and the inverter; anda controller to control the inverter based on a phase current sampled through the DC-link resistor, wherein the controller estimates a phase current based on the phase current sampled through the DC-link resistor, in an interval in which phase current detection is not possible, andwherein the AC voltage is converted in accordance with a switching operation and output to a motor.2. The motor driving apparatus of claim 1 , wherein the controller controls a switching element in the inverter according to space vector-based pulse width modulation control claim 1 , and estimates the phase current based on the sampled phase current in the interval in which a voltage vector application time is shorter than a minimum voltage vector application time.3. The motor driving apparatus of claim 1 , wherein the controller estimates the phase current in the interval based on the sampled phase current claim 1 , a phase current gradient according to a switching pattern of a ...

METHOD FOR RESTARTING INDUCTION MACHINE

Disclosed embodiments relate to apparatuses, methods, and systems for restarting an induction machine. In some embodiments, a method includes estimating a position of a rotor and a speed thereof in a position and speed estimation Operation, resetting a speed reference to correspond to the speed of the rotor in a speed reference resetting Operation, generating a control voltage corresponding to the speed reference to regulate a voltage magnitude using the control voltage in a voltage magnitude regulation Operation, and re-accelerating the induction machine up to a target speed after the regulation of the voltage magnitude in a re-acceleration Operation. 1. A method for restarting an induction machine to restore power , comprising:estimating a position and a speed of a rotor when a driving signal is supplied to an induction machine;resetting a speed reference to correspond to the estimated speed of the rotor;generating a control voltage corresponding to the reset speed reference in order to regulate a voltage magnitude using the control voltage; andre-accelerating the induction machine up to a target speed after the voltage magnitude has been regulated.2. The method of claim 1 , wherein resetting the speed reference includes:determining whether the estimated speed of the rotor is equal to or greater than a reference speed; andresetting the speed reference to correspond to the estimated speed of the rotor when it is determined that the estimated speed of the rotor is equal to or greater than the reference speed.3. The method of claim 2 , further comprising:blocking a driving signal being supplied to the induction machine when the estimated speed of the rotor is determined to be less than the reference speed.4. The method of claim 1 , wherein regulating the voltage magnitude comprises gradually regulating the voltage magnitude from a magnitude of an estimated counter electromotive force of the rotor to a magnitude of the voltage reference using an estimated value of a ...

MOTOR DRIVE HAVING FUNCTION OF DETECTING DC LINK CURRENT

A motor drive according to the present invention includes an inverter circuit for converting a direct current into an alternating current by the switching of power elements and supplying the alternating current to a motor; a drive circuit for controlling the switching of the power elements; a fuse connected in series between a terminal of a DC link unit and a terminal of the inverter circuit through a conductor; a DC link current detection circuit for detecting a DC link current based on at least one of a voltage across the fuse, a voltage across a circuit including the fuse and part of the conductor, and a voltage across part of the conductor; and a DC link overcurrent detection circuit for detecting an overcurrent when the DC link current exceeds a predetermined value, and outputting a power element off command to turn off at least one of the power elements. 1. A motor drive comprising:an inverter circuit for converting a direct current supplied from terminals of a DC link unit into an alternating current by the switching of a plurality of power elements, and supplying the alternating current to a motor;a drive circuit for controlling the switching of the plurality of power elements of the inverter circuit;a fuse connected in series between one of the terminals of the DC link unit and one of terminals of the inverter circuit through a conductor;a DC link current detection circuit for detecting a DC link current flowing from the terminal of the DC link unit to the inverter circuit based on at least one of a voltage across the fuse, a voltage across a circuit including the fuse and part of the conductor, and a voltage across part of the conductor; anda DC link overcurrent detection circuit for detecting that the DC link current is an overcurrent when the detected DC link current exceeds a predetermined current value, and outputting a power element off command to the drive circuit in order to turn off at least one of the plurality of power elements.2. The motor drive ...

SEMICONDUCTOR DEVICE, INVERTER, AND AUTOMOBILE

The present invention relates to a semiconductor device provided with a dead-time generation circuit, the semiconductor device including: first and second status-detection circuits that each have a function of detecting whether first and second switching devices are in turn-off operation to output first and second status signals, respectively, and each have a function of generating a dead time of on-off operation of the corresponding one of the first and second switching devices; a first logic circuit that receives a first on-off command signal instructing the first switching device to be turned on or off, and the second status signal to output a signal allowing the first switching device to be turned on only when the second switching device is not in turn-off operation; and a second logic circuit that receives the first on-off command signal instructing the second switching device to be turned on or off, and the first status signal to output a signal allowing the second switching device to be turned on only when the first switching device is not in turn-off operation. 1. A semiconductor device comprising:first and second switching devices connected in series between a first potential and a second potential lower than the first potential to operate complementarily;a first gate driving circuit that performs driving control of the first switching device;a second gate driving circuit that performs driving control of the second switching device;a first status-detection circuit having functions of not only detecting whether the first switching device is in turn-off operation to output a result of the detection as a first status signal, but also generating a dead time of on-off operation of each of the first and second switching devices;a second status-detection circuit having functions of not only detecting whether the second switching device is in turn-off operation to output a result of the detection as a second status signal, but also generating a dead time of on-off ...

Motor control apparatus

A motor control apparatus includes: duty calculation units that calculate a duty of a PWM signal based on a deviation between a value of a physical quantity of a motor with a command value; and a duty setting unit that performs setting of the duty based on the duty calculated by the duty calculation units. The duty setting unit maintains a present duty until new duty is input from any one of the plurality of duty calculation units, and updates the duty from the present duty to the new duty when the new duty is input from any one of the plurality of duty calculation units. A PWM signal generation unit generates the PWM signal based on the duty set by the duty setting unit and a carrier signal generated by a carrier signal generation unit.

POWER CONVERSION APPARATUS

A power conversion apparatus includes: a converter that includes input terminals and switching elements corresponding to respective phases of a three-phase AC power supply and converts an AC voltage of the three-phase AC power supply into a DC voltage, and a capacitor that smooths the DC voltage converted by the converter. A single-phase AC power supply or a DC power supply is connected to two of the input terminals corresponding to any two of the three phases of the converter while a passive element is provided to connect the remaining one of the input terminals corresponding to the phase to which the single-phase AC power supply or the DC power supply is not connected, with one terminal of the capacitor. 1. A power conversion apparatus comprising:a converter including input terminals and switching elements corresponding to respective phases of a three-phase AC power supply, and configured to convert an AC voltage of the three-phase AC power supply into a DC voltage; anda capacitor configured to smooth the DC voltage converted by the converter, wherein:a single-phase AC power supply or a DC power supply is connected to two of the input terminals corresponding to any two of three phases of the converter; anda passive element is provided to connect remaining one of the input terminals corresponding to a phase to which the single-phase AC power supply or the DC power supply is not connected, with one terminal of the capacitor.2. The power conversion apparatus according to claim 1 , further comprising:a voltage detector configured to detect a voltage across the capacitor; anda control unit configured to control the switching elements corresponding to respective phases of the converter, whereinthe control unit is configured to, when the voltage across the capacitor exceeds a threshold, turn on the switching element corresponding to a phase of the input terminal to which the single-phase AC power supply or the DC power supply is not connected, so as to discharge an ...

ELECTRIC MACHINE CONTROL SYSTEM AND CONTROL METHOD THEREOF

An electric machine control system adapted to a motor includes a voltage detector, a power module, a current detector and a controller. The voltage detector detects a bus voltage to generate a voltage detection signal. The power module generates a first phase current, a second phase current and a third phase current to drive the motor according to the bus voltage and a PWM signal. To generate the current detection signal, the current detector detects at least two of the following: the first phase current, the second phase current and the third phase current. When the motor is operating in a steady state and blocked, the controller calculates the DC offset error of the motor according to the voltage detection signal and the current detection signal. 1. An electric machine control system , adapted to a motor , comprising:a voltage detector, detecting a bus voltage to generate a voltage detection signal;a power module, generating a first-phase current, a second-phase current, and a third-phase current according to the bus voltage and a pulse-width modulation signal, wherein the first-phase current, the second-phase current, and the third-phase current are configured to drive the motor;a current detector, detecting at least two of the first-phase current, the second-phase current, and the third-phase current to generate a current detection signal; anda controller, determining whether the motor is operating in a steady state according to the current detection signal, wherein when the motor is operating in the steady state, the controller determines whether a rotation speed of the motor is zero, wherein when the rotation speed is zero, the motor is in a stalled state and the controller calculates a DC offset error of the motor according to the voltage detection signal and the current detection signal.2. The electric machine control system of claim 1 , wherein the controller generates a first axis current and a second axis current according to the current detection signal ...

ELECTRIC POWER STEERING APPARATUS

An electric power steering apparatus, without outside attachment circuit, that is capable of simultaneously sampling two phases of which the duties are not saturated and of cheaply detecting the 3-shunt currents by using two A/D converting units in correspondence to the duty saturation phase (the maximum phase) changing when the motor is rotated. The apparatus calculates a current command value due to at least a steering torque, performs a PWM-control of a 3-phase motor through an inverter based on the current command value, and assist-controls a steering system of a vehicle by detecting currents of the 3-phase motor and feed-backing. 15-. (canceled)6. An electric power steering apparatus that calculates a current command value due to at least a steering torque , performs a PWM-control of a 3-phase motor through an inverter based on said current command value , and assist-controls a steering system of a vehicle by detecting currents of said 3-phase motor and feed-backing , comprising:a current detecting circuit to detect 3-phase currents of down-stream 3-shunts of said inverter; andtwo A/D converting units having a common channel and inputting 3-phase current detected-signals from said current detecting circuit;wherein said electric power steering apparatus includes a current detecting system that any one of said 3-phase current detected-signals is inputted into said common channel and current detected-signals of rest 2-phase are respectively inputted into other channel of said A/D converting units.7. The electric power steering apparatus according to claim 6 , wherein said electric power steering apparatus further including a maximum-phase detecting section to detect a duty maximum-phase of said PWM-control and a switching section to switch inputs into said two A/D converting units of said 3-phase current detected-signals claim 6 ,wherein said switching section is switched based on a detection result of said maximum-phase detecting section, and two signals of said ...