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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 7157. Отображено 100.
30-08-2012 дата публикации

Motor control device, control program therefor, and method for the control

Номер: US20120217910A1
Автор: Hiroshi Haibara, Kazuhiro Konomoto, Koji Mizumoto, Masato Uwatoko, Motoki Shimozono, Youji Kawano
Принадлежит: Fujitsu Semiconductor Ltd

A motor control device determines a rotation angle and an angular speed of a motor, and has: a correcting unit including N number (N is an positive integer equal to or more than 2) of bit-shift circuits, which divide the angular speed by powers of 2 by bit shift, and a circuit, which subtracts output values of the second to Nth bit-shift circuits from an output value of the first bit-shift circuit to determine a correction amount for the rotation angle and correct the rotation angle by the correction amount; so as to determine two-phase direct voltages to obtain a target torque from the three-phase alternate currents passing through the motor according to the angular speed, and convert the two-phase direct voltages into the three-phase alternate voltages according to the sine, cosine of the corrected rotation angle.

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Номер записи: 1
30-08-2012 дата публикации

Interior permanent magnet machine systems and methods for controlling interior permanent magnet machines

Номер: US20120217911A1
Автор: Long Wu, Robert Shaw
Принадлежит: Deere and Co

Example embodiments disclose an Interior Permanent Magnet (IPM) machine system including an IPM machine including a nominal operating direct current (dc) bus voltage, and a controller configured to detect an operating dc bus voltage of the IPM machine and to control the IPM machine based on the nominal operating dc bus voltage and the detected operating dc bus voltage.

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Номер записи: 2
06-12-2012 дата публикации

Brushless motor drive device and drive method

Номер: US20120306416A1
Автор: Masaki Hano
Принадлежит: HITACHI AUTOMOTIVE SYSTEMS LTD

The invention relates to a brushless motor drive device that performs switching determination of energization modes of a three-phase brushless motor according to a sensorless method, and a drive method thereof. A pulse induced voltage induced in a non-energized phase of three phases by a pulse voltage is compared with a threshold to determine the switching timing of the energization modes. Here, by limiting a duty ratio of a voltage application to equal to or greater than a lower limit, a situation in which the pulse induced voltage is sampled while the pulse induced voltage is oscillating is avoided, and a situation in which the pulse induced voltage falls below a voltage detection resolution is avoided. As a result, determination of energization mode switching timing based on a pulse induced voltage can be performed more stably.

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Номер записи: 3
28-02-2013 дата публикации

Motor control unit and electric power steering system

Номер: US20130049652A1
Автор: Isao Namikawa, Terutaka Tamaizumi, Yuji Kariatsumari
Принадлежит: JTEKT Corp

A F/B gain control unit computes a first change component by executing torque feedback control based on a torque deviation using a feedback gain that is computed by a F/B gain variable control unit. The F/B gain variable control unit computes one of two different feedback gains that correspond to a “first computation mode” in which the first change component is used as an addition angle and a “second computation mode” in which a value obtained by correcting the first change component by an estimated motor rotation angular velocity is used as the addition angle, respectively. A feedback gain used in the first computation mode is set such that a response at the feedback gain is higher than that at a feedback gain used in the second computation mode.

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Номер записи: 4
16-05-2013 дата публикации

METHODS AND APPARATUS FOR ELECTRIC MOTOR CONTROLLER PROTECTION

Номер: US20130119906A1
Автор: Bonner, Brattoli Mark A., JR. Guy
Принадлежит: Regal Beloit America, Inc.

A method for monitoring input power to an electronically commutated motor (ECM) is described. The method includes determining, with a processing device, an average input current to the motor, the average input current based on a voltage drop across a shunt resistor in series with the motor, measuring an average input voltage applied to the motor utilizing the processing device, multiplying the average input current by the average voltage to determine an approximate input power, and communicating the average input power to an external interface. 1. A method of protecting a motor controller of an electric motor , said method comprising:determining, with a processing device, an average input current to the motor based on a voltage drop across a shunt resistor in series with the motor;measuring at least one voltage;determining, with the processing device, an average input voltage applied to the motor based on the at least one measured voltage;multiplying the average input current by the average input voltage to determine an average input power; andsetting a maximum power limit for the motor controller based on the average input power.2. A method in accordance with claim 1 , further comprising maintaining the average input power below the maximum power limit.3. A method in accordance with claim 2 , wherein maintaining the average input power below the maximum power limit comprises controlling the amount of current delivered to the motor.4. A method in accordance with claim 3 , wherein controlling the amount of current delivered to the motor comprises pulse width modulating at least one power switch included in an inverter coupled to the motor.5. A method in accordance with claim 1 , further comprising using the determined average input power as an indication in an airflow delivery system to control the amount of power delivered to a fan.6. A method in accordance with claim 1 , further comprising using the determined average input power as an indication in an airflow ...

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Номер записи: 5
06-06-2013 дата публикации

MOTOR DRIVE SYSTEM AND CONTROL METHOD THEREOF

Номер: US20130141027A1
Автор: Nakata Hideki
Принадлежит:

A motor drive system comprising: an inverter that supplies power to a three-phase motor; and a control unit that controls switching elements of upper and lower arms included in the inverter by switching between supply control of controlling the switching elements so that alternating current is supplied to three phases of the three-phase motor and suspension control of controlling the switching elements so that the supply of current is stopped. The suspension control involves: putting and keeping, in a conduction state, a switching element of at least one upper arm each corresponding to one of one or more phases through which current flows in a direction entering the three-phase motor at a timing at which the supply of current is stopped, and putting and keeping switching elements of rest of the upper arms and switching elements of lower arms in a non-conduction state. 1. A motor drive system comprising:an inverter that supplies power to a three-phase motor by supplying alternating current to three phases of the three-phase motor, the inverter including at least three upper arms and at least three lower arms, each of the at least three upper arms and each of the at least three lower arms including a switching element and a freewheeling diode that are connected in parallel; anda control unit that performs control of the switching elements included in the inverter by switching between (i) supply control of controlling the switching elements so as to cause the inverter to supply alternating current to the three phases and (ii) suspension control of controlling the switching elements so as to cause the inverter to stop the supply of alternating current to the three phases, whereinthe control unit switches from the supply control to the suspension control at a timing at which the supply of alternating current to the three phases is to be stopped, and putting and keeping, in a conduction state, a switching element of at least one upper arm, among the at least three upper ...

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Номер записи: 6
13-06-2013 дата публикации

Electric Motor

Номер: US20130147418A1
Автор: Butler Edward, Mosley Kevin, Palmer Denis L.
Принадлежит:

A multi-phase electric motor comprises a stator comprising a plurality of wire coils surrounding a non-magnetizable core; a rotor with permanent magnets embedded therein, the rotor being disposed adjacent to the stator, the rotor being mounted on a rotatable drive shaft; a power source; a position sensor operably connected to the rotor; and a control circuit operably connected to the power source, the position sensor, and the wire coils, for controlling distribution of electrical energy to the wire coils. In this motor the control mechanism transfers electrical charge from a first coil to a second coil. 1. A coil and magnet arrangement for a multi-phase electric regenerating motor , comprising:a first pair of magnets separated by a distance B, each magnet having a width W, length L and height L;a second pair of magnets separated by a distance B, each magnet having a width W, length L, and height L, separated from said first pair of magnets by distance A;a coil having a core with a height HC,wherein W≦A, and L≧A.2. A coil and magnet arrangement according to claim 1 , wherein B≦A.4. A coil and magnet arrangement according to claim 1 , wherein C≧W.5. A coil and magnet arrangement according to claim 1 , wherein HM≧HC.6. A coil and magnet arrangement according to claim 1 , wherein B≦A claim 1 , C≧W claim 1 , and HM≧HC.7. A method for modular control of an electric motor comprising:generating a digital PWM signal containing a clock frequency and duty cycle set as one of a performance limiter or based on the natural response sessonant frequency of the motor coils;generating timing and polarity start and stop pulses,generating a throttle signal;generating a protection signal;logically determining based on the digital PWM signal, the timing an polarity signal, the throttle signal and the protection signal, when to turn the motor on and off to achieve a maximum saturation of magnetic field within a coil, prior to complete collapse of the field for the off portion of a duty ...

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Номер записи: 7
04-07-2013 дата публикации

CONTROL DEVICE AND CONTROL METHOD FOR POWER CONTROL UNIT

Номер: US20130169206A1
Автор: Itoh Tetsuhiro, KATOH Satoru, Suhama Masayoshi, Yamada Kenji
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A control device controls an inverter controlling an output of a motor by PWM control. The control device calculates a reference frequency based on a torque and a rotation speed of the motor, calculates a random coefficient using two data tables, and calculates, as a random frequency, a value obtained by adding, to a reference frequency, a value obtained by multiplying a prescribed width by the random coefficient. The control device calculates control limit lines based on the rotation speed of the motor, and corrects the random frequency so as to fall within a range that is higher than the control limit line and lower than the control limit line. The control device generates a carrier signal having a random frequency as a carrier frequency. 1. A control device for a power control unit controlling electric power transmitted and received between a motor and a power supply ,said power control unit including at least one switching element and converting electric power by turning said switching element on and off,said control device comprising:a first control unit controlling said switching element to be turned on and off based on comparison between a carrier signal and a control command; anda second control unit controlling a frequency of said carrier signal,said second control unit setting a frequency range in accordance with a rotation speed of said motor, and causing the frequency of said carrier signal to fluctuate within said frequency range, anda lower limit value of said frequency range being set at a value that is greater as the rotation speed of said motor becomes higher.2. The control device for a power control unit according to claim 1 , whereinsaid lower limit value is a switching frequency of said switching element required for ensuring controllability of said motor.3. The control device for a power control unit according to claim 2 , wherein said lower limit value is set at approximately zero in a region where the rotation speed of said motor is lower than ...

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Номер записи: 8
11-07-2013 дата публикации

DYNAMIC RECONFIGURATION-SWITCHING OF WINDINGS IN A MOTOR USED AS A GENERATOR IN A TURBINE

Номер: US20130175966A1
Автор: Astigarraga Tara, BATES Allen K., BUI Nhan X., Dickens Louie A., HANCOCK REED A., SCHWARTZ Stephen L., STARLING Michael E., Winarski Daniel J.
Принадлежит: INTERNATIONAL BUSINESS MACHINES CORPORATION

For a motor used as a generator, employing a dynamic reconfiguration-switching of motor windings upon the generator, used in a turbine, exceeding a maximum usable constraint of a first direct current (DC)-to-alternating current (AC) inverter in order to reduce a voltage constant of the motor thereby limiting one of a produced voltage and a produced power. 1. A method for switching motor windings of a motor used as a generator using a processor device , the method comprising:employing a dynamic reconfiguration-switching of a plurality of motor windings upon the generator used in one of a plurality of turbines exceeding one of a maximum usable constraint of a first direct current (DC)-to-alternating current (AC) inverter in order to reduce a voltage constant of the motor thereby limiting one of a produced voltage and a produced power.2. The method of claim 1 , further including performing one of:dynamically splitting the plurality of motor windings, anddynamically connecting a second DC-to-AC inverter to the plurality of motor windings upon splitting the plurality of motor windings if the plurality of motor windings are in a serial configuration.3. The method of claim 2 , further including defining the maximum usable constraint to be at least one of a maximum usable voltage and a maximum usable power.4. The method of claim 3 , further including claim 3 , for a parallel configuration of the plurality of motor windings claim 3 , employing the dynamic reconfiguration-switching of the plurality of motor windings upon the generator exceeding the maximum usable voltage of the first DC-to-AC inverter in order to reduce the voltage constant of the motor thereby limiting the produced voltage.5. The method of claim 3 , further including claim 3 , for the serial configuration of the plurality of motor windings claim 3 , employing the dynamic reconfiguration-switching of the plurality of motor windings upon the generator exceeding one of the maximum usable voltage and the maximum ...

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Номер записи: 9
25-07-2013 дата публикации

Programmable power tool with brushless dc motor

Номер: US20130187587A1
Автор: Colin G. Knight, Milos Coric
Принадлежит: Colin G. Knight, Milos Coric

A power tool that includes a brushless DC motor, one or more motor sensors, and a controller, such as, for example, an electronic speed control (ESC) circuit. The controller is adapted to provide instructions to control the operation of one or more parameters of the brushless DC motor. The controller is also adapted to receive feedback from one or more motor sensors that reflect whether the motor is attaining the one or more parameters. The controller may also be adapted to have a learning mode, in which feedback provided during use of the power tool is stored by the controller as a program so that the same operating parameters may be subsequently replicated by using the program to operate the tool. The controller may also use the feedback to adjust the operation of the motor so that the motor maintains one or more selected or programed operating parameters.

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Номер записи: 10
01-08-2013 дата публикации

Motor device

Номер: US20130193883A1
Автор: Hiroyuki Shitabou
Принадлежит: Nidec Corp

A motor device may include a motor unit and a converter unit. The motor unit may include a brushless DC motor, an inverter circuit, and an inverter drive circuit. The inverter circuit may supply a drive current to the brushless DC motor. The inverter drive circuit may supply a drive pulse signal to the inverter circuit. The converter unit may be connected to the motor unit. The converter unit may include an AD/DC converter and a microcomputer. The AC/DC converter may convert an AC voltage to a DC voltage to be supplied to the motor unit. The microcomputer may receive a digital control signal and may output an analog control signal. The inverter drive circuit may receive the analog control signal outputted from the microcomputer and may output a drive pulse signal to be supplied to the inverter circuit.

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Номер записи: 11
01-08-2013 дата публикации

Method for operating a brushless electric motor

Номер: US20130193885A1
Автор: Christian Gunselmann, Lionel Guichard, Mathias Fernengel, Michel Parette, Nicolas Bruyant
Принадлежит: Continental Automotive GmbH

A method for operating a brushless electric motor, the windings being energized by an inverter with the aid of six switches. A detection unit for detecting defective switches, a unit for measuring voltage at the outputs of the inverter, and a microcontroller for controlling the switch and for generating a pulse width modulated voltage supply for the windings are provided. A short-circuited switch causes a torque in the electric motor opposite the actuating direction of the electric motor. The method proposes that after detecting a short-circuited switch, the windings (U. V. W) are energized to generate a motor torque that is, on the whole, positive. An actuating period of the electric motor is divided into a plurality of sectors, wherein, in accordance with the defective switch, individual sectors are deactivated for the actuation of the windings (U, V, W), while other sectors are used to actuate the windings (V, W).

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Номер записи: 12
08-08-2013 дата публикации

Apparatus for driving brushless dc motor

Номер: US20130200832A1
Автор: Jimin Oh
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Disclosed is an apparatus for driving a BLDC motor, the apparatus including: a BLDC motor having a single sensing coil therein; a position/speed calculation unit for calculating a current position and a current speed of a rotor by using voltages at both ends of the sensing coil; a control unit for comparing the current speed of the rotor calculated by the position/speed calculation unit with a command speed and then outputting a control signal through a Proportional Integral (PI) control; a motor driving unit for generating a PWM signal based on the current position of the rotor calculated by the position/speed calculation unit and the control signal output by the control unit; and a power device unit for controlling the BLDC motor according to the PWM signal generated by the motor driving unit.

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Номер записи: 13
29-08-2013 дата публикации

MOTOR DRIVING CIRCUIT, MOTOR DRIVING APPARATUS HAVING THE SAME, AND MOTOR DRIVING METHOD

Номер: US20130221882A1
Автор: Gu Bon Young
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein is a motor driving circuit including: a duty ratio detection unit that detects a duty ratio of input pulse-width-modulation applied to control a speed of a motor; a speed detection unit that detects the speed of the motor; and a driving control unit that detects a targeted speed corresponding to the duty ratio of the input pulse-width-modulation by using relationship data between the duty ratio of the input pulse-width-modulation and the targeted speed that are previously stored and controls a driving of the motor so that the speed of the motor is equal to the targeted speed. By this configuration, a speed of the motor can be accurately controlled. 1. A motor driving circuit , comprising:a duty ratio detection unit that detects a duty ratio of input pulse-width-modulation applied to control a speed of a motor;a speed detection unit that detects the speed of the motor; anda driving control unit that detects a targeted speed corresponding to the duty ratio, of the input pulse-width-modulation by using relationship data between the duty ratio of the input pulse-width-modulation and the targeted speed that are previously stored and controls a driving of the motor so that the speed of the motor is equal to the targeted speed.2. The motor driving circuit according to claim 1 , further comprising: a storage unit in which the relationship data between the duty ratio of the input pulse-width-modulation and the targeted speed are stored.3. The motor driving circuit according to claim 1 , wherein the storage unit stores the relationship data between the duty ratio of the input pulse-width-modulation and the targeted speed in a look up table form.4. The motor driving circuit according to claim 2 , wherein the storage unit stores the relationship data between the duty ratio of the input pulse-width-modulation and the targeted speed in a linear function form of the targeted speed with respect to the duty ratio of the input pulse-width-modulation.5. The motor ...

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Номер записи: 14
29-08-2013 дата публикации

MOTOR DRIVING CIRCUIT, MOTOR DRIVING APPARATUS HAVING THE SAME, AND MOTOR DRIVING METHOD

Номер: US20130221883A1
Автор: Gu Bon Young
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

Disclosed herein is a motor driving circuit including: a duty ratio detection unit that detects a duty ratio of input pulse-width-modulation applied to control a speed of a motor; and a driving control unit that detects an output duty ratio corresponding to the duty ratio of the input pulse-width-modulation by using relationship data between the duty ratio of the input pulse-width-modulation and an output duty ratio that are previously stored and controls a duty ratio of a driving signal applied to the motor according to the output duty ratio. By this configuration, a speed of the motor can be accurately controlled. 1. A motor driving circuit , comprising:a duty ratio detection unit that detects a duty ratio of input pulse-width-modulation applied to control a speed of a motor; anda driving control unit that detects an output duty ratio corresponding to the duty ratio of the input pulse-width-modulation by using relationship data between the duty ratio of the input pulse-width-modulation and an output duty ratio that are previously stored and controls a duty ratio of a driving signal applied to the motor according to the output duty ratio.2. The motor driving circuit according to claim 1 , further comprising a storage unit in which the relationship data between the duty ratio of the input pulse-width-modulation and the output duty ratio are stored.3. The motor driving circuit according to claim 2 , wherein the storage unit stores the relationship data between the duty ratio of the input pulse-width-modulation and the output duty ratio in a look up table form.4. The motor driving circuit according to claim 2 , wherein the storage unit stores the relationship data between the duty ratio of the input pulse-width-modulation and the output duty ratio in a linear function form of the output duty ratio with respect to the duty ratio of the input pulse-width-modulation.5. The motor driving circuit according to claim 4 , wherein the linear function of the output duty ratio ...

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Номер записи: 15
29-08-2013 дата публикации

Motor controlling apparatus

Номер: US20130221886A1
Автор: Hitoshi Matsumoto
Принадлежит: Denso Ten Ltd

A motor controlling apparatus includes: a controller configured to (i) compute a target duty cycle value which is a target value for a duty cycle used for a pulse width modulation control for controlling a motor, and (ii) specify 100% as a duty cycle specified value when the target duty cycle value is greater than an upper limit value which is below 100%, or specify 0% as the duty cycle specified value when the target duty cycle value is less than a lower limit value which exceeds 0%; and a control signal generator that generates a control signal for controlling the motor at the duty cycle specified value specified by the controller.

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Номер записи: 16
26-09-2013 дата публикации

SENSORLESS CONTROL APPARATUSES AND CONTROL METHODS THEREOF

Номер: US20130249450A1
Автор: HAN So Hee, KWON Oh Hyuk, Yoo Ho Sun, YOON Young Doo
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A sensorless control apparatus may include: a speed command unit configured to output a speed command to an electric motor; a current detector unit configured to detect electric current flowing through the electric motor if a voltage being output according to the speed command is supplied to the electric motor; a rotor angle calculation unit configured to calculate a magnetic flux of a rotor of the electric motor based on the detected electric current and the voltage being output according to the speed command, and to calculate an angle of the rotor from the calculated magnetic flux; and/or an out-of-step sensing unit configured to sense an out-of-step of the rotor according to a comparison of the calculated angle of the rotor with an angle of the rotor estimated based on a sensorless control algorithm. 1. A sensorless control apparatus , comprising:a speed command unit configured to output a speed command to an electric motor;a current detector unit configured to detect electric current flowing through the electric motor if a voltage being output according to the speed command is supplied to the electric motor;a rotor angle calculation unit configured to calculate a magnetic flux of a rotor of the electric motor based on the detected electric current and the voltage being output according to the speed command, and to calculate an angle of the rotor from the calculated magnetic flux; andan out-of-step sensing unit configured to sense an out-of-step of the rotor according to a comparison of the calculated angle of the rotor with an angle of the rotor estimated based on a sensorless control algorithm.2. The sensorless control apparatus of claim 1 , further comprising:a first converter configured to convert calculated two-phase voltage commands, corresponding to the speed command, into three-phase voltages, corresponding to the speed command.3. The sensorless control apparatus of claim 1 , further comprising:a first coordinate system conversion unit configured to ...

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Номер записи: 17
26-09-2013 дата публикации

VARIABLE SPEED SWITCH

Номер: US20130249463A1
Автор: Nishikimi Junichi
Принадлежит: MAKITA CORPORATION

The variable speed switch according to the present invention is capable of outputting an electric signal for increasing or decreasing an amount of electric power supplied to the motor of an electric power tool according to a displacement amount of a switch-operating portion. The variable speed switch includes a wake-up contact configured to work when the switch-operating portion is operated and by which a voltage can be applied to a control circuit part of the motor to make the control circuit part in an operable state, and also includes a load sensor configured to receive a pressing force from the switch-operating portion by the displacement amount of the switch-operating portion after the operation of the wake-up contact is made and to output an electric signal according to the pressing force. 1. A variable speed switch mounted to an electric power tool and capable of outputting an electric signal for increasing or decreasing an amount of electric power supplied to a motor of the electric power tool according to a displacement amount of a switch-operating portion , comprising:a wake-up contact configured to work when the switch-operating portion is operated and by which a voltage can be applied to a control circuit part of the motor to make the control circuit part in an operable state; anda load sensor configured to receive a pressing force from the switch-operating portion by a displacement of the switch-operating portion after the operation of the wake-up contact is made and to output an electric signal according to the pressing force.2. The variable speed switch according to claim 1 , wherein the pressing force from the switch-operating portion is applied to the load sensor via an elastic member.3. The variable speed switch according to claim 1 , wherein:the wake-up contact includes a balance-like member supported so as to be rotatable around a fulcrum, and also includes a receiving member configured to be brought into contact with and separated from the ...

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Номер записи: 18
10-10-2013 дата публикации

CONTROLLER AND METHOD FOR IMPROVING MOTOR DRIVING EFFICIENCY

Номер: US20130264982A1
Автор: Cheng Mao-Hsin
Принадлежит: PADUAL TECHNOLOGY CO., LTD.

The present invention discloses a controller and a method for improving motor driving efficiency. According to the present invention, multiple control parameters are inputted to the controller so that the controller can adjust timings of PWM driving signals for driving the motor to advance or delay the turned-ON or turned-OFF points, whereby the motor is driven efficiently. 1. A controller for improving motor driving efficiency , the controller supplying a PWM driving signal to a driver circuit , the controller comprising:a motor speed/period detection unit receiving a signal relating to a motor and detecting the speed and period of the motor;a PWM signal timing calculation unit receiving a plurality of parameters and an output from the motor speed/period detection unit, and determining a timing of the PWM driving signal so that a turned-ON point of the PWM driving signal is earlier than a level switching point of the signal relating to a motor; anda PWM signal generation unit generating the PWM driving signal according to an output from the PWM signal timing calculation unit.2. The controller of claim 1 , wherein when the speed of the motor is relatively higher claim 1 , the turned-ON point of the PWM driving signal is relatively more advanced claim 1 , and when the speed of the motor is relatively lower claim 1 , the turned-ON point of the PWM driving signal is relatively less advanced.3. The controller of claim 2 , wherein the signal relating to a motor is a HALL signal.4. The controller of claim 2 , wherein the PWM driving signal includes four PWM signals and the driver circuit includes four transistors claim 2 , each of which has a gate controlled by a corresponding one of the PWM signals.5. The controller of claim 1 , wherein the plurality of parameters include a parameter for adjusting the turned-ON point of the PWM driving signal and a reference speed of the motor.6. The controller of claim 5 , wherein the plurality of parameters further include a parameter ...

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Номер записи: 19
24-10-2013 дата публикации

Method for Adjusting a DC Voltage Intermediate-Circuit Voltage

Номер: US20130278190A1
Автор: Fink Holger
Принадлежит: ROBERT BOSCH GMBH

A method is disclosed for adjusting a voltage of a DC-voltage intermediate circuit in a battery system having a battery and a drive system. The battery is configured to output one selectable output voltage from n+1 different output voltages. In a first step of the method, an actual value of the voltage of the DC-voltage intermediate circuit is determined, and is then compared with the various output voltages of the battery. A first selected output voltage of the battery, which is the highest voltage of those output voltages of the battery which are less than the actual value of the voltage of the DC-voltage intermediate circuit, and a second selected output voltage of the battery, which is the lowest voltage of those output voltages of the battery which are higher than the actual value of the voltage of the DC-voltage intermediate circuit, are then selected. 1. A method for adjusting a voltage of a DC voltage intermediate circuit in a battery system having a battery and a drive system , wherein the battery is connected to the drive system by way of the DC voltage intermediate circuit and comprises a number of n series-connected battery modules , wherein each series-connected battery module comprises a coupling unit and at least one battery cell that is connected between a first input and a second input of the coupling unit and is configured to provide either a battery module voltage or a voltage of zero in dependence upon a switching state of the coupling unit , and wherein n is greater than 1 so that the battery is configured to provide an output voltage that is selectable from n+1 different output voltages , the method comprising:a) determining an instantaneous value of the voltage of the DC voltage intermediate circuit;b) comparing the instantaneous value of the voltage of the DC voltage intermediate circuit with the different output voltages of the battery;c) selecting a first selected output voltage of the battery that is the highest voltage of those output ...

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Номер записи: 20
24-10-2013 дата публикации

ELECTRONICALLY COMMUTATED PUMP MOTOR CIRCUIT

Номер: US20130280100A1
Автор: Morales Luis, Zavodny Stephen, Zumstein Jared
Принадлежит: SNTech, INC.

An electronically commutated pump motor circuit comprises an input configured, to receive at least a first range of voltages, and a power conditioning circuit. The power conditioning circuit includes an active power factor correction circuit, coupled to the input. The power conditioning circuit is configured to receive the first range of voltages and automatically output to an electronically commutated motor (optionally a pump motor) a substantially constant DC voltage for input voltages within the first range of input voltages, boosted with respect to a voltage received at the input, to thereby maintain a substantially constant motor shaft speed for any voltage within the first range of voltages. 1. An electronically commutated pump motor circuit , comprising:an input configured to receive at least a first range of voltages, the first range of voltages including at least 115 VAC; receive the first range of voltages,', 'automatically output to an electronically commutated pump motor a substantially constant DC voltage for input voltages within the first range of input voltages, boosted with respect to a voltage received at the input, to thereby maintain a substantially constant motor pump motor shaft speed for any voltage within the first range of voltages., 'a transformer-less power conditioning circuit, including at least an active power factor correction circuit, coupled to the input, the power conditioning circuit configured to2. The electronically commutated pump motor circuit as defined in claim 1 , wherein the electronically commutated pump motor circuit is further configured to operate the pump motor over the first range of voltages without manipulation of a jumper or switch by a user to enable operation at different voltages within the first range of voltages.3. The electronically commutated pump motor circuit as defined in claim 1 , wherein the first range includes 115VAC and 230VAC.4. The electronically commutated pump motor circuit as defined in claim 1 ...

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Номер записи: 21
07-11-2013 дата публикации

HVAC ADJUSTMENT MODULE

Номер: US20130293166A1
Автор: Jones William M., Klimo Robert G., Merkel William F.
Принадлежит: DYNAMOTORS, INC.

A heating, ventilation and air conditioning (HVAC) system is provided. The system includes an integrated motor including a plurality of operating speeds and an input for selecting one of the plurality of operating speeds. The system further includes a system controller and an adjustment module. The adjustment module includes a plurality of operating modes each associated with one of the plurality of operating speeds and the ability to manually vary associations between the plurality of operating modes and the plurality of operating speeds. The adjustment module selects one of the plurality of operating modes on the basis of control commands received from the system controller and setting programmed or manually entered into and stored in the adjustment module and controls the integrated motor according to the operating speed associated with the selected operating mode. 1. A method for computing and reporting cubic feet per minute (CFM) of airflow of a motor operating at an operating speed and operating torque , said method comprising:modeling CFM of the motor as a function of motor torque to create a CFM model;calculating a ratio of the operating speed to a base speed of the motor;calculating a base torque of the motor at the base speed from the ratio and the operating torque;calculating a base CFM of the motor from the base torque and the CFM model; and,calculating an operating CFM of the motor at the operating speed using the base CFM and the ratio.2. The method according to claim 1 , wherein the CFM is represented as a polynomial.3. The method according to claim 1 , wherein the modeling includes:receiving a plurality of data points, each data point including a torque of the motor and a corresponding CFM of the motor; and,fitting a polynomial trend line to the plurality of measured data points.4. The method according to claim 3 , wherein the plurality of measured data points are empirically determined through testing.6. The method according to claim 1 , wherein the ...

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Номер записи: 22
07-11-2013 дата публикации

METHOD AND DEVICE FOR OPERATING AN ELECTRIC MACHINE HAVING EXTERNAL OR HYBRID EXCITATION

Номер: US20130293182A1
Автор: Neuburger Martin, Reutlinger Kurt
Принадлежит: ROBERT BOSCH GMBH

The invention relates to an electronically commutated electric machine () comprising: a rotor (); an exciting winding () that is located at the rotor () in order to generate or alter a direct magnetic field in the rotor (); a stator () comprising a three- or multi-phase stator winding () with phases that can be controlled via phase lines (). The exciting winding () is connected to the stator winding (). 12. An electronically commutated electric machine () , comprising:{'b': '21', 'a rotor ();'}{'b': 6', '21', '21, 'an exciter winding () arranged at the rotor () in order to generate or alter a direct magnetic field in the rotor (); and'}{'b': 22', '23', '8, 'a stator () having a three-phase or polyphase stator winding () with phases which can be driven via phase lines ();'}{'b': 6', '23, 'wherein the exciter winding () is electrically connected to the stator winding ().'}22611. The electric machine () as claimed in claim 1 , wherein the exciter winding () is connected to a supply potential via an exciter winding line ().3268. The electric machine () as claimed in claim 1 , wherein the exciter winding () is connected to one of the phase lines ().42236. The electric machine () as claimed in claim 1 , wherein the stator winding () has stator coils interconnected in star connection claim 1 , wherein the exciter winding () is connected to a star point of the star connection.51. A motor system () comprising:{'b': '2', 'claim-ref': {'@idref': 'CLM-00003', 'claim 3'}, 'an electric machine () as claimed in ;'}{'b': 3', '8, 'a power stage () for providing phase voltages and/or phase currents on the phase lines ();'}{'b': 5', '8', '6', '8, 'a control unit () for driving the power stage, such that the phase line () connected to the exciter winding () has a constant phase potential and such that the remaining phase voltages are provided in such a way that in each case sinusoidal voltage profiles arise as differential voltages between the phase lines ().'}61. A motor system () ...

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Номер записи: 23
21-11-2013 дата публикации

Electrical Control System

Номер: US20130307450A1
Автор: David J. Wehrlen, Robert Lyle Fuller
Принадлежит: Individual

An electrical control system having a direct current to direct current regulator receiving a direct current supply input, wherein the regulator outputs a controlled voltage direct current inverter power feed. Included is an inverter in electrical communication with the regulator and receives the controlled voltage direct current inverter power feed, the inverter outputs an alternating current motor power feed to a permanent magnet brushless direct current motor that outputs a shaft rotational speed and a back electromotive force. Also, a control is provided for regulating the controlled voltage direct current inverter power feed based upon criteria utilizing the back electromotive force or an auxiliary motor stator wire loop signal in conjunction with an optional voltage look-up table to substantially make the controlled voltage result in a reduction of a pulse width modulation switching frequency to further smooth and reduce harmonic of the alternating current waveform to increase motor efficiency.

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Номер записи: 24
26-12-2013 дата публикации

CONTROLLER AND CONTROL METHOD OF SYNCHRONOUS MOTOR WITH AMPLIFIER PROTECTION FUNCTION

Номер: US20130342143A1
Автор: IWASHITA Yasusuke, SONODA Naoto
Принадлежит:

The controller of the synchronous motor of the present invention includes: an allowable energy value acquisition unit () which acquires an allowable energy value until which a dynamic brake resistor, which is for short-circuiting the input terminal of the synchronous motor at a time of failure, can bear; an inertia estimation unit () which estimates inertia of a driven object based on a speed value and an electric current value; an allowable maximum speed calculation unit () which calculates an allowable maximum speed value of the synchronous motor from the inertia and the allowable energy value; and a speed control unit () which controls the amplifier for operating the synchronous motor at a predetermined commanded speed, in which the speed control unit () acquires the allowable maximum speed value from the allowable maximum speed calculation unit (), and limits the commanded speed to the allowable maximum speed value or lower. 1. A controller of a synchronous motor comprising:an allowable energy value acquisition unit which acquires an allowable energy value until which a dynamic brake resistor can bear, the dynamic brake resistor being for short-circuiting an input terminal of the synchronous motor at a time of failure;an inertia estimation unit which estimates inertia of a driven object based on a speed value which is fed back from the synchronous motor while the synchronous motor is driving the driven object and an electric current value which is fed back from an amplifier and input to the synchronous motor;an allowable maximum speed calculation unit which calculates an allowable maximum speed value of the synchronous motor from the inertia and the allowable energy value; anda speed control unit which controls the amplifier for operating the synchronous motor at a predetermined commanded speed,wherein the speed control unit acquires the allowable maximum speed value from the allowable maximum speed calculation unit, and limits the commanded speed to the ...

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Номер записи: 25
02-01-2014 дата публикации

Method for Operating an Electric Motor

Номер: US20140001989A1
Автор: BISCHOF Thomas, Buerk Richard
Принадлежит: Kaltenbach & Voigt GmbH

A method and device for determining the motor moment constant kof an electric motor by measuring motor parameters on the running motor. For reduction of the previously considerable measuring effort it is proposed that firstly the generator voltage Uproduced by the motor is measured, and in that the motor moment constant kis calculated by division of the generator voltage Uand the speed of rotation fof the motor, taking into consideration at least one further constant. The method and the device are suitable for DC motors and for 3-phase synchronous motors. 1. A method for operating an electric motor , comprising:accelerating the electric motor by applying an operating voltage to produce an inductive operating current;after the accelerating step, switching off the operating voltage;after the step of switching off the operating voltage, letting the inductive operating current fade away; and{'sub': 'EMK', 'after the step of letting the operating current fade away, determining a generator voltage Uproduced by the electric motor.'}2. A method according to claim 1 , wherein the generator voltage Uis produced by the electric motor rotating at a speed of rotation f claim 1 , the method further comprising calculating a motor torque constant kfor the electric motor using the produced generator voltage Uand speed of rotation f.5. A method according to claim 1 , wherein the step of determining the generator voltage Ucomprises determining the generator voltage with essentially no current flowing through the electric motor.6. A method according to claim 1 , wherein the accelerating step comprises accelerating the electric motor to a speed of rotation f claim 1 , the method further comprising claim 1 , after the accelerating step claim 1 , determining the speed of rotation f.7. A method according to claim 6 , wherein the motor is a DC motor claim 6 , and wherein the step of determining the speed of rotation fcomprises measuring the speed of rotation fvia an external speed of ...

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Номер записи: 26
16-01-2014 дата публикации

BLDC MOTOR DRIVING APPARATUS AND REFRIGERATOR USING THE SAME

Номер: US20140013784A1
Автор: CHO Hyun Chang, HAMAOKA Koji, Lee Seon Gu, PARK Pyeong Ki, PARK Sung In, Ryu Ho Hyun, SEO Jeong Ho, Shin Hyo Jea, Yoshihiko Takeda
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

A motor driving apparatus and a refrigerator using the same is provided. The refrigerator may include a compressor, a motor, a driving unit, temperature sensing units sensing the temperatures of storage chambers and an external temperature, and a control unit selecting a driving mode of the driving unit based on the sensing result of the temperature sensing units and controlling the driving unit to drive the motor according to the selected driving mode. In a general operation mode, the control unit controls the driving unit to drive the motor in a 120 degree conduction method, and in a power-saving operation mode, the control unit controls the driving unit to drive the motor in a 90 degree conduction method. The refrigerator increases a pulse width of driving current by converting the conduction method of the motor to drive the motor at a low speed during power-saving operation of the refrigerator. 1. A refrigerator comprising:a compressor;a motor to provide rotating force to the compressor;a driver to drive the motor;temperature sensors to sense the temperatures of storage chambers and an external temperature; anda controller to select a driving mode of the driver based on the sensing result of the temperature sensors, and to control the driver to drive the motor according to the selected driving mode,wherein, in a general operation mode, the controller controls the driver to drive the motor in a 120 degree conduction method, and in a power-saving operation mode, the controller controls the driver to drive the motor in a 90 degree conduction method.2. The refrigerator according to claim 1 , wherein the motor is a brushless direct current (BLDC) motor claim 1 , the refrigerator further comprises a position sensor to sense the position of a rotor of the BLDC motor claim 1 , and the position to detect back electromotive force generated from coils of the BLDC motor.3. The refrigerator according to claim 2 , wherein the controller includes a mode selector to select the ...

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Номер записи: 27
16-01-2014 дата публикации

Control apparatus for electric motor, electrically-powered vehicle including the control apparatus, and method for controlling electric motor

Номер: US20140018991A1
Автор: Kenji Yamada
Принадлежит: Toyota Motor Corp

A PI calculation unit of a rectangular-wave voltage control unit calculates a control deviation by performing a PI calculation on a torque deviation relative to a torque command value, and outputs a voltage phase of a rectangular-wave voltage in accordance with the control deviation. A rate-of-change limiter imposes a restriction on the rate of change of the voltage phase. Here, the rate-of-change limiter lessens the restriction on the rate of change of the voltage phase, when the rate of change of the rotational speed of an electric motor is larger than a predetermined value representing an abrupt change of the rotational speed of the electric motor.

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Номер записи: 28
23-01-2014 дата публикации

HEAVY DUTY MILL

Номер: US20140021279A1
Автор: Berchten Stefan, Rittler Stefan
Принадлежит: FLSMIDTH A/S

In a drive arrangement for a heavy duty mill an electric motor with a high number of magnetic poles and a stator that is segmented into at least four stator segments is used. By providing one, more or all of the stator segments with a three phase winding system, a highly modular mill drive with a high power density and therefore reduced space requirements is provided. 1. A drive arrangement for a heavy duty mill , including an electric motor with a rotor and a stator , characterised in that a number of magnetic poles of the rotor is at least eight and in that the stator is segmented into at least four stator segments each having at least two winding areas , where a winding is provided in each winding area of at least one stator segment.2. A drive arrangement according to claim 1 , where the number of magnetic poles of the rotor is twenty and the stator includes exactly ten stator segments.3. A drive arrangement according to claim 1 , where each stator segment has exactly three winding areas and where the windings provided in the winding areas of a stator segment are connected in a star circuit claim 1 , where both ends of each winding are preferably lead to an outside of a housing of the motor through a single opening and where a star point of the star circuit is preferably positioned outside of the housing.4. A drive arrangement according to claim 1 , where the electric motor includes one claim 1 , advantageously two or more redundantly arranged measuring units for determining an angular position of the rotor claim 1 , where a measuring unit preferably includes a resolver.5. A drive arrangement according to claim 1 , including at least one frequency converter that is connected to the windings of a stator segment claim 1 , where the at least one frequency converter is preferably connected to the windings of at most two stator segments.6. A drive arrangement according to claim 5 , where each frequency converter is operable with a switching frequency higher than 1 kHz ...

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Номер записи: 29
30-01-2014 дата публикации

BOOST CONVERTER CONTROL APPARATUS

Номер: US20140028225A1
Автор: Okamura Masaki, Takamatsu Naoyoshi
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A boost converter control apparatus for controlling a motor drive system which is provided with a boost converter disposed between an electric power converter and a direct current power supply, the boost converter boosting a direct current voltage of the direct current power supply and supplying it to the electric power converter, is provided with: an operating device provided with a proportional element, an integral element and a derivative element, the derivative element being configured as a bandpass filter, the operating device calculating a PID controlled variable corresponding to an electric current command value of the boost converter for maintaining an output voltage of the boost converter at a command value of an inter-terminal voltage VH of a smoothing condenser; and a controlling device which is configured to control the output voltage of the boost converter on the basis of the calculated PID controlled variable. 14-. (canceled)5. A boost converter control apparatus which is configured to control a boost converter in a motor drive system , said motor drive system comprising:a direct current power supply;a three-phase alternating current motor;an electric power converter disposed between the direct current power supply and the three-phase alternating current motor, the electric power converter including switching circuits, each of which corresponds to respective one of three phases of the three-phase alternating current motor, and a smoothing condenser, which is disposed electrically in parallel with the switching circuits; andthe boost converter disposed between the electric power converter and the direct current power supply, the boost converter boosting a direct current voltage of the direct current power supply and supplying it to the electric power converter,said boost converter control apparatus comprising:an operating device comprising a proportional element, an integral element and a derivative element, the derivative element being configured as a ...

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Номер записи: 30
06-02-2014 дата публикации

Motor driving apparatus

Номер: US20140035494A1
Автор: Joo Yul Ko
Принадлежит: Samsung Electro Mechanics Co Ltd

There is provided a motor driving apparatus capable of optimizing driving efficiency by adjusting a phase difference between current applied to a motor and voltage detected from the motor and performing the adjustment of the phase difference when a pulse width modulation (PWM) signal has a set duty. The motor driving apparatus includes: a driving unit driving a motor according to driving control; a driving controlling unit controlling the driving of the motor by the driving unit, based on an adjusted phase correction signal; and a phase correcting unit correcting a phase difference between a motor detection signal having motor rotation speed information and a current detection signal having detection information regarding current flowing in the motor when a duty of a pulse width modulation (PWM) signal driving the motor satisfies a preset reference duty, and providing the phase correction signal to the driving controlling unit.

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Номер записи: 31
13-02-2014 дата публикации

Motor driving system

Номер: US20140042878A1
Автор: Akiko SOMA, Charles Simson Halason Silitonga, Makoto Yajima, Toshihiro Okabe
Принадлежит: Nidec Servo Corp

A motor driving system that changes a rotation speed of a motor pursuant to a speed command includes a main device including a drive circuit configured to drive the motor, an input device configured to input the speed command to the drive circuit, and a signal insulating unit configured to insulate the input device from the main device and to transmit the speed command from the input device to the drive circuit of the main device.

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Номер записи: 32
20-02-2014 дата публикации

MOTOR CONTROL DEVICE, MOTOR CONTROL METHOD, AND IMAGE FORMING APPARATUS

Номер: US20140049199A1
Автор: ISHIZUKA Natsuko, KIGUCHI Hiroyuki, MURATA Takuya, SEKI Takeo
Принадлежит:

A motor control device supplies a drive control signal to a drive circuit that drives a motor at a constant period using a motor drive signal based on the drive control signal, and shuts off the motor drive signal when a count value counted by a counter that reset the count value if a state of the motor changes exceeds a threshold corresponding to a plurality of driving periods of the motor. The motor control device includes: a control unit that controls a setting unit to set a rotational direction of the motor to a first rotational direction and a second rotational direction reverse to the first rotational direction at the constant period alternately, when a drive mode of the motor is a position holding mode to drive the motor so as to hold a rotational position of the motor. 1. A motor control device that supplies a drive control signal to a drive circuit that drives a motor at a constant period using a motor drive signal based on the drive control signal used to generate torque on the motor , and shuts off the motor drive signal to the motor when a count value counted by a counter that counts the count value at a predetermined interval and resets the count value if a state of the motor changes exceeds a threshold corresponding to the count value for a plurality of driving periods of the motor , the motor control device comprising:a setting unit that sets a rotational direction of the motor driven under control at the constant period;a control unit that controls the setting unit to set the rotational direction of the motor to a first rotational direction and a second rotational direction reverse to the first rotational direction at the constant period alternately, when a drive mode of the motor is a position holding mode to drive the motor so as to hold a rotational position of the motor; anda generating unit that generates the drive control signal.2. The motor control device according to claim 1 , wherein the control unit controls the generating unit to generate ...

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Номер записи: 33
06-03-2014 дата публикации

VEHICLE INCLUDING MOTOR CONTROL DEVICE, AND CONTROL METHOD FOR VEHICLE

Номер: US20140062359A1
Автор: OYANAGI Hiroyuki, Oyobe Hichirosai, YAMAMOTO Tetsutaka
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A vehicle, including a motor having a rotor, a resolver that detects a rotation angle of the rotor and a control device, and a control method for the vehicle are provided. The control device executes rectangular-wave control over the motor using the rotation angle of the rotor, detected by the resolver, executes zero learning for learning a deviation between an origin of an actual rotation angle of the rotor and an origin of the detected rotation angle of the rotor, corrects the detected rotation angle of the rotor on the basis of a result of the zero learning, and, when the zero learning has not been completed yet, executes avoidance control for avoiding a rapid variation in output of the motor. 1. A vehicle comprising:a motor having a rotor;a resolver configured to detect a rotation angle of the rotor; anda control device configured to execute rectangular-wave control over the motor using the rotation angle of the rotor, the rotation angle being detected by the resolver, the control device being configured to execute zero learning for learning a deviation between an origin of an actual rotation angle of the rotor and an origin of the detected rotation angle of the rotor and then correct the detected rotation angle of the rotor on the basis of a result of the zero learning, and the control device being configured to execute avoidance control for avoiding a rapid variation in output of the motor when the zero learning has not been completed yet.2. The vehicle according to claim 1 , whereinthe control device is configured to set a control range of a rectangular-wave voltage phase that is used in the rectangular-wave control to a first range after the zero learning has been completed, and the avoidance control is control for limiting the control range of the rectangular-wave voltage phase as compared to the first range.3. The vehicle according to claim 1 , whereinthe control device is configured to calculate an estimated torque of the motor using the detected rotation ...

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Номер записи: 34
13-03-2014 дата публикации

IMAGE FORMING APPARATUS, MOTOR CONTROL APPARATUS AND MOTOR CONTROL METHOD

Номер: US20140070740A1
Автор: BYUN Ji-Young, Hwang Ho-bin, KIM Gwon-hoon, Kim Hyoung-Il, KIM Yae-young, SHIN Seong-ho, YOU Yong-Ho, YUN Young Jung
Принадлежит: SAMSUNG ELECTRONICS CO., LTD.

An image forming apparatus includes an engine unit to perform an image forming job; an engine control unit to control the operation of the engine unit; a brushless direct current (BLDC) motor to drive the engine unit; a sensor unit to sense electric angle information and driving velocity information of the BLDC motor; a communication interface to receive a digital control command with respect to the BLDC motor from the engine control unit; a driving signal unit to generate a driving signal to control the BLDC motor; and a digital control unit to control the operation of the driving signal unit in a digital phase locked loop (PLL) manner for feedback controls the BLDC motor, based on the received digital control command, the detected electric angle information and the driving velocity information and a digital gain value as a control factor with respect to the BLDC motor. 1. An image forming apparatus , comprising:an engine unit to perform an image forming job;an engine control unit to control the operation of the engine unit;a brushless direct current (BLDC) motor to drive the engine unit;a sensor unit to sense electric angle information and driving velocity information of the BLDC motor;a communication interface to receive a digital control command with respect to the BLDC motor from the engine control unit;a driving signal unit to generate a driving signal to control the BLDC motor; anda digital control unit to control the operation of the driving signal unit in a digital phase locked loop (PLL) manner for feedback controls the BLDC motor, based on the received digital control command, the detected electric angle information and the driving velocity information and a digital gain value as a control factor with respect to the BLDC motor.2. A motor control apparatus , comprising:a brushless direct current (BLDC) motor;a communication interface unit to receive a digital control command with respect to the BLDC motor;a sensor unit to detect electric angle information ...

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Номер записи: 35
27-03-2014 дата публикации

Motor controlling device and motor controlling method

Номер: US20140084823A1
Автор: Soo Woong Lee
Принадлежит: Samsung Electro Mechanics Co Ltd

There are provided a motor controlling device and a motor controlling method. The motor controlling device includes: an open loop driving unit performing open loop controlling using a pulse width modulation (PWM) signal; a closed loop driving unit performing feedback controlling using a difference between a current speed of a motor and the PWM signal; and a driving controlling unit calculating a duty ratio of the PWM signal and comparing the calculated duty ratio with a preset reference duty to thereby control any one of the open loop driving unit and the closed loop driving unit to operate signal.

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Номер записи: 36
03-04-2014 дата публикации

MOTOR DRIVING APPARATUS AND MOTOR DRIVING METHOD

Номер: US20140091741A1
Автор: Ko Joo Yul
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

There are provided a motor driving apparatus and a motor driving method capable of decreasing power consumption by readjusting a preset duty ratio according to a voltage level of driving power. The motor driving apparatus includes: a driving power detecting unit detecting a voltage level of driving power used to drive a motor; a speed controlling unit adjusting a preset duty ratio of a pulse width modulation (PWM) signal when the voltage level detected by the driving power detecting unit is equal to or less than a preset reference voltage; a driving controlling unit generating a driving signal having the duty ratio from the speed controlling unit; and a driving unit driving the motor according to the driving signal of the driving controlling unit. 1. A motor driving apparatus comprising:a driving power detecting unit detecting a voltage level of driving power used to drive a motor;a speed controlling unit adjusting a preset duty ratio of a pulse width modulation (PWM) signal when the voltage level detected by the driving power detecting unit is equal to or less than a preset reference voltage;a driving controlling unit generating a driving signal having the duty ratio from the speed controlling unit; anda driving unit driving the motor according to the driving signal of the driving controlling unit.2. The motor driving apparatus of claim 1 , wherein the speed controlling unit adjusts a preset on-duty ratio of the PWM signal.3. The motor driving apparatus of claim 2 , wherein the speed controlling unit decreases the preset on-duty ratio of the PWM signal when the voltage level detected by the driving power detecting unit is equal to or less than that of the reference voltage.4. The motor driving apparatus of claim 1 , further comprising a memory storing the duty ratio corresponding to the PWM signal provided from the outside therein.5. The motor driving apparatus of claim 1 , further comprising a speed detecting unit detecting a speed of the motor.6. The motor ...

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Номер записи: 37
01-01-2015 дата публикации

Motor Control Device And Motor Control Program

Номер: US20150002058A1
Автор: KASHIHARA Tatsuki, KOBAYASHI Kouji, YOSHIDA Hiroshi
Принадлежит: Sanden Corporation

A motor control device according to the present invention includes: a boost converter circuit that boosts a direct-current voltage; an inverter that generates a drive pulse for a motor from the direct-current voltage of the boost converter circuit and a control section that presets a set value Id_hold obtained by multiplying a set value Id_max by an intermediate current threshold coefficient α, controls a pulse width of the drive pulse of the inverter based on a speed deviation, controls a d-axis current in the motor based on the speed deviation so that the pulse width of the drive pulse of the inverter does not exceed a threshold value, and controls the direct-current voltage of the boost converter circuit based on the speed deviation so that the d-axis current in the motor does not exceed the set value Id_hold. 1. A motor control device comprising:a booster circuit that boosts a direct-current voltage;an inverter that generates a drive pulse for a motor from the direct-current voltage output by the booster circuit; anda control section that controls the booster circuit and the inverter,wherein the control section includes:means for presetting a modulation factor threshold value for the drive pulse output by the inverter, a maximum current threshold value for defining a maximum value of a d-axis current in the motor, and an intermediate current threshold value obtained by multiplying the maximum current threshold value by an intermediate current threshold coefficient α (0≦α≦1);means for deriving a speed deviation between a rotation speed of the motor and a target rotation speed;means for controlling a modulation factor of the drive pulse output by the inverter, based on the speed deviation;means for controlling the d-axis current in the motor based on the speed deviation so that the modulation factor of the drive pulse output by the inverter does not exceed the modulation factor threshold value; andmeans for controlling the direct-current voltage output by the ...

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Номер записи: 38
01-01-2015 дата публикации

METHOD AND APPARATUS FOR STABILITY CONTROL OF OPEN LOOP MOTOR DRIVE OPERATION

Номер: US20150002059A1
Автор: Liu Jingbo, Nondahl Thomas, Royak Semyon, Schmidt Peter
Принадлежит: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Motor drives and control methods are presented for sensorless motor speed control in which inverter output currents are sampled from the inverter output, and a frequency modulation value is determined based on the current feedback and either one or more voltage commands or one or more voltage feedback signals. A speed or frequency setpoint is adjusted at least partially according to the frequency modulation value to provide an adjusted frequency or speed setpoint value that is then used in controlling the inverter to provide stability control to mitigate hunting or motor stoppage. 1. A method for sensorless motor speed control in a motor drive , the method comprising:receiving a frequency or speed setpoint value representing a desired motor speed for a driven motor;sampling at least one AC output current feedback signal or value from an output of an inverter of the motor drive;computing a frequency modulation value based on the at least one AC output current feedback signal or value and on at least one voltage command or feedback signal or value;adjusting the frequency or speed setpoint value based at least partially on the frequency modulation value to provide an adjusted frequency or speed setpoint value; andcontrolling the inverter according to the adjusted frequency or speed setpoint value.2. The method of claim 1 , wherein adjusting the frequency or speed setpoint value comprises:rate limiting the frequency or speed setpoint value to provide a rate limited frequency or speed setpoint value; andsubtracting the frequency modulation value from the rate limited frequency or speed setpoint value to provide the adjusted frequency or speed setpoint value.3. The method of claim 1 , wherein adjusting the frequency or speed setpoint value comprises subtracting the frequency modulation value from the frequency or speed setpoint value to provide the adjusted frequency or speed setpoint value.4. The method of claim 3 , wherein computing the frequency modulation value ...

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Номер записи: 39
01-01-2015 дата публикации

DOUBLE SALIENCY EXTERIOR ROTOR SWITCHED RELUCTANCE MACHINE

Номер: US20150002063A1
Автор: Fahimi Babak, Lin Chenjie, Wang Wei
Принадлежит: The Board of Regents, The University of Texas System

An exterior rotor switched reluctance machine includes a stator, a rotor adjacent the stator and adjacent a housing, the housing connected to the stator. The stator further includes a back iron, a set of stator poles connected to the back iron and a set of windings disposed between the set of stator poles. The rotor, connected to a shaft and rotatively coupled to the stator, further includes a set of rotor segments. The set of windings includes a set of phases, each phase experiencing a flux linkage that varies with an angular position of the rotor. The apparatus operates as a motor in response to selectively energizing the set of phases with a set of current pulses. The apparatus operates as a generator in response to rotating the shaft. 1. A switched reluctance machine comprising:a stator further comprising a back iron and a set of stator poles connected to the back iron;a rotor, adjacent the stator, rotatively coupled to the stator and connected to a shaft;the rotor further comprising a set of rotor segments;a housing connected to the stator and adjacent the rotor;a set of stator windings alternately disposed between the set of stator poles;a set of phases, each phase comprising a subset of the set of stator windings;whereby selectively energizing the set of phases with a set of current pulses rotates the rotor with respect to the stator and the housing.2. The switched reluctance machine of claim 1 , wherein the rotor further comprises:a generally cylindrical cage connecting the set of rotor segments; and,wherein the set of rotor segments are spaced at equal angular intervals forming a set of gaps between each rotor segment of the set of rotor segments.3. The switched reluctance machine of claim 1 , further comprising:an outer air gap between the rotor and the housing; andan inner air gap between the set of rotor segments and the set of stator poles.4. The switched reluctance machine of claim 1 , wherein the set of stator poles are spaced at equal angular ...

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Номер записи: 40
01-01-2015 дата публикации

METHOD AND APPARATUS FOR STABILITY CONTROL OF OPEN LOOP MOTOR DRIVE OPERATION

Номер: US20150002067A1
Автор: Liu Jingbo, Nondahl Thomas, Rowan Timothy M., Royak Semyon, Schmidt Peter
Принадлежит: ROCKWELL AUTOMATION TECHNOLOGIES, INC.

Motor drives and control methods are presented for sensorless motor speed control in which inverter output currents are sampled from the inverter output and a frequency modulation value is determined based on the current feedback. A speed or frequency setpoint is adjusted at least partially according to the frequency modulation value to provide an adjusted frequency or speed setpoint value that is then used in controlling the inverter to provide stability control to mitigate hunting or motor stoppage. 1. A method for sensorless motor speed control in a motor drive , the method comprising:sampling at least one AC output current feedback signal or value from an output of an inverter of the motor drive;computing a frequency modulation value based on the at least one AC output current feedback signal or value;adjusting a frequency or speed setpoint value based at least partially on the frequency modulation value to provide an adjusted frequency or speed setpoint value; andcontrolling the inverter according to the adjusted frequency or speed setpoint value.2. The method of claim 1 , wherein adjusting the frequency or speed setpoint value comprises:rate limiting the frequency or speed setpoint value to provide a rate limited frequency or speed setpoint value; andsubtracting the frequency modulation value from the rate limited frequency or speed setpoint value to provide the adjusted frequency or speed setpoint value.3. The method of claim 2 , wherein adjusting the frequency or speed setpoint value comprises subtracting the frequency modulation value from the frequency or speed setpoint value to provide the adjusted frequency or speed setpoint value.4. The method of claim 3 , wherein computing the frequency modulation value comprises:computing an estimated per unit output current signal or value based on the at least one AC output current feedback signal or value; andcomputing the frequency modulation value based at least partially on the estimated per unit output current ...

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Номер записи: 41
01-01-2015 дата публикации

ELECTRIC POWER TOOL

Номер: US20150002070A1
Автор: ISHIKAWA Goshi, Kusakawa Takuya
Принадлежит:

An electric power tool includes a motor with a rotor having a permanent magnet; a control unit that sets a control amount of the motor in accordance with operation of an operation portion and that drive-controls the motor based on the control amount; and a number-of-rotations detection unit that detects the number of rotations of the motor. During driving of the motor, when the number of rotations detected by the number-of-rotations detection unit has reached an upper limit number of rotations set in advance, the control unit shifts drive control of the motor to rotation control, in which the control amount is made to be increased or decreased so that the number of rotations of the motor becomes a predetermined target number of rotations. 1. An electric power tool comprising:a motor comprising a rotor, the rotor comprising a permanent magnet;a control unit that sets a control amount of the motor in accordance with operation of an operation portion and that drive-controls the motor based on the control amount; anda number-of-rotations detection unit that detects the number of rotations of the motor,wherein, during driving of the motor, when the number of rotations detected by the number-of-rotations detection unit has reached an upper limit number of rotations set in advance, the control unit shifts drive control of the motor to rotation control, in which the control amount is made to be increased or decreased so that the number of rotations of the motor becomes a predetermined target number of rotations.2. The electric power tool according to claim 1 ,wherein the permanent magnet is formed by mixing magnetic powder with synthetic resin or rubber.3. The electric power tool according to claim 1 ,wherein the control unit sets the control amount of the motor in accordance with an operation amount of the operation portion, and in a state in which the operation amount or the control amount is equal to or greater than a threshold value set in advance, when the number of ...

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Номер записи: 42
07-01-2021 дата публикации

DRIVE UNIT FOR A WINDOW WIPER SYSTEM

Номер: US20210001814A1
Автор: NIEHAUS Christopher Daniel
Принадлежит:

A drive unit for a window wiper system having an electronically commutated drive motor, which has a rotor and phase conductors for providing a stator magnetic field; a reversing transmission, which controls one or more wiper arms of a wiper unit in a pivoting motion with alternating direction; a power unit, which provides phase voltages to the drive motor based on control signals and which has a device for measuring phase currents through the phase conductors; and a control unit, which determines a rotor position of the rotor of the drive motor based on the phase currents without using any sensors to generate the control signals based on the rotor position to provide a drive torque and to control rotational speed based on a specified operating function. 1. A drive unit for a window wiper system of a transportation vehicle , the drive unit comprising:an electronically commutated drive motor having a rotor and a plurality of phase conductors for providing a stator magnetic field;a reversing gear mechanism coupled to the rotor of the drive motor to control one or more wiper arms of a wiper unit in a pivot movement with changing directions in response to a rotation of the rotor;a power unit to provide phase voltages at the drive motor based on control signals and a device for measuring phase currents through the phase conductors; and to carry out a sensor-free position detection of a rotor position of the rotor of the drive motor,', 'to generate the control signals based on the rotor position to provide a drive torque, and', 'to carry out a speed control based on a predetermined operating function., 'a control unit which is constructed, based on phase currents2. The drive unit of claim 1 , wherein the control unit generates the control signals as pulse width modulation signals to predetermine variable phase voltages using the power unit.3. The drive unit of claim 1 , wherein the control unit specifies control signals to generate a predetermined rotary field through the ...

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Номер записи: 43
02-01-2020 дата публикации

MOTOR CONTROLLING METHOD, MOTOR CONTROLLING SYSTEM, AND ELECTRONIC POWER STEERING SYSTEM

Номер: US20200001915A1
Автор: GHADERI Ahmad
Принадлежит:

A motor controlling method includes a step of obtaining a vector of a resultant magnetic flux, a stator current, and a stator voltage, which are represented by a phasor, with respect to an α−β fixed coordinate system or a d-q rotating coordinate system, a step of calculating an angle (ϕ) between the stator current and the stator voltage, a step of calculating a torque angle (δ) according to: 15-. (canceled)6. A motor controlling method of controlling a surface permanent magnet motor , the motor controlling method comprising:a step of obtaining a vector of a resultant magnetic flux, a stator current, and a stator voltage, which are represented by a phasor, with respect to an α−β fixed coordinate system or a d-q rotating coordinate system;a step of calculating an angle (ϕ) between the stator current and the stator voltage; {'br': None, 'sup': '−1', 'sub': s', 'm, 'δ=ϕ−cos(ψ/ψ·cos(ϕ)),'}, 'a step of calculating a torque angle (δ) according to{'sub': m', 's, 'where ψindicates a magnetic flux of a stator magnet and ψindicates a magnitude of the resultant magnetic flux; and'}a step of controlling the surface permanent motor based on the torque angle (δ).7. The motor controlling method of claim 6 , further comprising a step of calculating torque (T) based on the torque angle (δ); whereinin the step of controlling the motor, the surface permanent magnet motor is controlled based on the torque (T).8. The motor controlling method of claim 7 , further comprising a step of calculating a phase angle (ρ) based on components of the resultant magnetic flux on an α-axis and a β-axis in the α−β fixed coordinate system and calculating a rotor angle (θ) based on the torque angle (δ) and the phase angle (ρ); whereinin the step of controlling the motor, the surface permanent magnet motor is controlled based on the rotor angle (θ) and the torque (T).9. A motor controlling system comprising:a surface permanent magnet motor; anda control circuit configured to control the surface permanent ...

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Номер записи: 44
13-01-2022 дата публикации

Method of controlling a brushless permanent magnet motor

Номер: US20220014125A1
Автор: Libo Zheng, Neil William HODGINS
Принадлежит: Dyson Technology Ltd

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.

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Номер записи: 45
04-01-2018 дата публикации

TIME-INTERLEAVING CONVERTER AND CONTROL METHOD THEREOF

Номер: US20180006574A1
Автор: CHOI WooJae, YOON Kwang Ho
Принадлежит: Silicon Mitus, Inc.

A converter that may include: a power stage configured to include at least one inductor and a plurality of switching devices, and configured to be able to operate in a buck mode, a boost mode, or a buck-boost mode according to the control; and a controller configured to apply, to the power stage, two or more operation modes selected from the buck mode, the boost mode, or the buck-boost mode, and configured to periodically change the operation mode of the power stage. 1. A converter comprising:a power stage configured to include at least one inductor and a plurality of switching devices, and configured to be able to operate in a buck mode, a boost mode, or a buck-boost mode according to the control; anda controller configured to apply, to the power stage, two or more operation modes selected from the buck mode, the boost mode, or the buck-boost mode, and configured to periodically change the operation mode of the power stage.2. The converter according to claim 1 , wherein a lowest voltage in a variable range of an output voltage of the power stage is lower than an input voltage and a highest voltage thereof is higher than the input voltage.3. The converter according to claim 1 , wherein the controller is configured to:operate the power stage in one of the buck mode, the boost mode, or the buck-boost mode in a first time period of one cycle;operate the power stage in another of the buck mode, the boost mode, or the buck-boost mode in a second time period of the one cycle; andcontrol the first time period and the second time period to be variable.4. A converter comprising:a power stage configured to includean inductor,a first switching device configured to have one side connected to an input voltage and the other side connected to the inductor,a second switching device configured to have one side connected to an output voltage and the other side connected to the inductor,a third switching device configured to have one side connected to the first switching device and ...

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Номер записи: 46
04-01-2018 дата публикации

MOTOR CONTROL APPARATUS AND METHOD

Номер: US20180006587A1
Автор: Barrass Peter, Hodgson David, Slater Howard
Принадлежит: Sevcon Limited

An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus including a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data. 2. The apparatus of claim 1 , comprising a torque demand modifier configured to modify the torque demand signal based on the modified indication of the DC voltage in the event that the modified indication of the DC voltage is outside a first selected range claim 1 ,and in which the current data provider is configured to provide motor current data based on the modified torque demand signal.3. The apparatus of comprising a current data modifier configured to modify the provided current data based on the difference between the modified torque demand signal and a boundary of a second selected range in the event that the torque demand signal is outside the second selected range.6. The apparatus of claim 5 , in which the processor is configured to modify the torque demand signal based on the modified indication of the DC voltage in the event that the modified indication of the DC voltage is outside a first selected range claim 5 , and to provide motor current data based on the modified torque demand signal.7. The apparatus of in which the processor is configured to modify the provided current data based on the difference between the modified torque demand signal and a boundary of a second selected range in the event that the torque demand signal is outside the second selected range.9. The apparatus of any preceding claim in which the current data comprises a direct phase current information claim 6 , and ...

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Номер записи: 47
04-01-2018 дата публикации

Rotor Flux Angle and Torque Trajectory Control Apparatus and Methods

Номер: US20180006588A1
Автор: MAGEE DAVID PATRICK, THOMAS ERIC JAMES
Принадлежит:

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 ...

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Номер записи: 48
03-01-2019 дата публикации

Controller of rotary electric machine

Номер: US20190006968A1
Автор: Hideaki Tani, Hiroyuki Saito, Yasufumi Ogawa
Принадлежит: Mitsubishi Electric Corp

To provide a controller of a rotary electric machine which can prevent the vibration torque component to be outputted by the rotary electric machine from being upper-limited by the maximum output torque of the rotary electric machine. A controller of a rotary electric machine decreases an amplitude of the vibration torque command value so that a vibration maximum value obtained by adding an amplitude of a vibration torque command value to a basic torque command value becomes less than or equal to an upper limit command value; and calculates a value obtained by upper-limiting an addition torque command value, which is obtained by adding the vibration torque command value to the basic torque command value, by the upper limit command value, as a final torque command value.

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Номер записи: 49
03-01-2019 дата публикации

OPTIMIZING COMPARATOR OPERATION FOR A VARYING DC COMPONENT INPUT

Номер: US20190006970A1
Автор: Sullivan Matthew Sean, Vemuri Arun Tej
Принадлежит:

In one embodiment, an apparatus includes a different amplifier. A node in the apparatus receives a motor-current signal and an output of the differential amplifier. The motor-current signal represents a motor current of a DC brush motor. Moreover, a first input of the differential amplifier is coupled to a node. The apparatus also includes a low-pass filter with an input receiving a motor-current signal and an output coupled to a second input of the differential amplifier. The apparatus additionally includes a comparator with a first input coupled to the output of the differential amplifier and a second input coupled to a referential voltage. 1. An apparatus comprising:a differential amplifier;a node receiving a motor-current signal and an output of the differential amplifier, wherein the motor-current signal represents a motor current of a DC brush motor;a first input of the differential amplifier coupled to the node;a low pass filter with an input receiving a motor-current signal and an output coupled to a second input of the differential amplifier; anda comparator with a first input coupled to the output of the differential amplifier and a second input coupled to a referential voltage.2. The apparatus of claim 1 , wherein the first input of the differential amplifier is an inverting input and the second input of the differential amplifier is a non-inverting input.3. The apparatus of claim 1 , wherein the first input of the comparator is an inverting input and the second input of the comparator is a non-inverting input.4. The apparatus of claim 1 , wherein the input of the low pass filter receives the motor-current signal from a bandpass filter.5. The apparatus of claim 4 , wherein the bandpass filter comprises an operational amplifier with an output coupled to the input of the low pass filter claim 4 , a first input coupled to the motor-current signal claim 4 , and a second input coupled to a referential voltage.6. The apparatus of claim 4 , wherein the bandpass ...

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Номер записи: 50
02-01-2020 дата публикации

Motor controlling method, motor controlling system, and electronic power steering system

Номер: US20200007063A1
Автор: Ahmad Ghaderi
Принадлежит: Nidec Corp

A motor controlling method includes a step of obtaining a resultant magnetic flux and a stator current, which are represented by a phasor, with respect to an αβ fixed coordinate system or a dq rotating coordinate system, a step of calculating a torque angle (δ) according to: δ=cos −1 [(ψ s 2 +ψ m 2 −( LI s ) 2 )/(2ψ s ψ m )], where L is an armature inductance, ψ m indicates a magnetic flux of a stator magnet, ψ s indicates a magnitude of the resultant magnetic flux, and I s indicates a magnitude of the stator current, and a step of controlling the surface permanent magnet motor based on the torque angle (δ).

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Номер записи: 51
08-01-2015 дата публикации

Method for controlling a permanently excited synchronous motor

Номер: US20150008851A1
Автор: Mikael Despres
Принадлежит: Magna Electronics Europe GmbH and Co oHG

A method for controlling a permanently excited synchronous motor, in particular a brushless direct-current motor, having a permanently magnetized rotor and a number of stationary Stator windings to which an alternating voltage of predetermined amplitude and frequency is applied, wherein the frequency of the alternating voltage is determined by the speed of the motor and a phase difference results between the alternating voltage and the alternating current for each Stator winding. Accordingly, current is applied to the Stator windings in such a way that between alternating voltage (U Phase ) and alternating current (I Phase ) arises a phase angle (Ψ Target , Ψ′ Target ), which is selected according to speed (ω), motor inductance (L), and the power received by the motor.

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Номер записи: 52
08-01-2015 дата публикации

On The Dynamic Response of Actuation Devices in Nonlinear Dynamics Systems

Номер: US20150008852A1
Автор: Feng Dake, Rastegar Jahangir S.
Принадлежит: OMNITEK PARTNERS LLC

A method for actuating a motor including: separating feed-forward signals corresponding to motion independent components of a required actuating force/torque from motion dependent components; filtering the motion dependent components of the feed-forward signals to at least reduce high frequency signals generated due to feedback signals; and either not filtering or filtering with a low pass filter having a higher cut off frequency the motion independent components of the feed-forward signals to at least reduce higher frequency noise and components; wherein higher frequency components of electronic power amplifier signals corresponding to the motion independent components of the actuating forces/torques are not eliminated by the low pass filter, thereby ensuring that the reaction forces/torques are provided to actuate the motor. 1. (canceled)2. A method of controlling an actuation device to move an actuator , the method comprising acts of:receiving information on a starting first position and an indication of a motion to move the actuator from the starting first position to a second position;dividing the indicated motion into motion dependent components and motion independent components;determining a difference between the first and second positions;combining the difference between the first and second positions with the motion dependent components producing a first combined result;filtering the first combined result removing one or more high frequency components beyond a dynamic response capability of the actuator producing a first filtered result;combining the first filtered result with the motion independent components producing a second combined result;converting the second combined result to a power signal for driving the actuator; anddriving the actuator with the power signal.3. The method of claim 2 , comprising acts of:determining an updated first position resulting from driving the actuator;repeating the acts of determining the difference, combining the ...

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Номер записи: 53
08-01-2015 дата публикации

Quadrant Change Control in Brushless DC Motors

Номер: US20150008854A1
Автор: Douglas C. Cameron
Принадлежит: Boeing Co

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.

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Номер записи: 54
14-01-2016 дата публикации

Electrically motorized wheel

Номер: US20160009169A1
Автор: Assaf Biderman, John David Heinzmann, Jon Stevens
Принадлежит: Superpedestrian Inc

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. The electrically motorized wheeled vehicle includes a plurality of electrically motorized wheels, each of the plurality of electrically motorized wheels in communication with at least one other of the plurality of electrically motorized wheels to coordinate operation of the vehicle.

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Номер записи: 55
14-01-2016 дата публикации

SYSTEMS, METHODS AND DEVICES FOR TRAVERSING ELEVATION CHANGES USING ELECTRICALLY MOTORIZED VEHICLES

Номер: US20160009336A1
Автор: Biderman Assaf, Stevens Jon
Принадлежит:

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. One method for controlling the device for an electrically motorized wheel includes controlling an amount of assistance from the device of the electrically motorized wheel while travelling uphill to result in a user input requirement about equivalent to that required to propel the vehicle on a level surface. 1. A method for controlling a device of an electrically motorized wheel for converting a vehicle to an electrically motorized vehicle via installation of the electrically motorized wheel , the method comprising:controlling an amount of assistance from the device of the electrically motorized wheel while travelling uphill and an amount of resistance from the electrically motorized wheel while traveling downhill to result in a user input requirement about equivalent to that required to propel the vehicle on a level surface.2. The method as recited in claim 1 , wherein the controlling the amount of assistance while travelling uphill and the amount of resistance while traveling downhill is based on a user selection.3. The method as recited in claim 1 , wherein the controlling includes adjusting a user adjustable parameter.4. The method as recited in claim 3 , wherein the user adjustable parameter includes a minimum incline of the hill.5. The method as recited in claim 3 , wherein the user adjustable parameter includes a desired user input limit.6. The method as recited in claim 1 , wherein the amount of resistance while traveling downhill includes braking.7. The method as recited in claim 1 , wherein the user adjustable parameter includes a maximum downhill speed.8. The method as recited in claim 1 , wherein the controlling includes a mode selection from a plurality of operational modes.9. The method as recited in claim 8 , wherein one of the ...

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Номер записи: 56
10-01-2019 дата публикации

MOTOR CONTROL METHOD, APPARATUS, AND SYSTEM

Номер: US20190009919A1
Автор: LAN Qiu, NI Jinyun, ZHOU Changxing
Принадлежит:

A method for controlling a motor includes obtaining a present electrical parameter of a battery, calculating a compensation amount of a control signal of the motor according to the present electrical parameter, and modifying the control signal according to the compensation amount. 1. A method for controlling a motor comprising:obtaining a present electrical parameter of a battery;calculating a compensation amount of a control signal of the motor according to the present electrical parameter; andmodifying the control signal according to the compensation amount.2. The method according to claim 1 , wherein the present electrical parameter includes at least one of a present charge quantity of the battery claim 1 , a present voltage of the battery claim 1 , a present output electrical current of the battery claim 1 , or a present internal resistance of the battery.3. The method according to claim 2 , wherein the control signal includes at least one of a control signal configured to control a rotation speed of the motor or a control signal configured to control an output power of the motor.4. The method according to claim 3 , wherein:the present electrical parameter of the battery includes the present voltage of the battery; and 'calculating the compensation amount of the control signal of the motor corresponding to a subsequent time point according to the present voltage of the battery and a preset voltage model including one-to-one correspondences between voltages of the battery and preset compensation amounts.', 'calculating the compensation amount includes5. The method according to claim 4 , wherein modifying the control signal includes:modifying, at a present time point, the control signal according to the compensation amount.6. The method according to claim 3 , wherein:the present electrical parameter of the battery includes the present voltage of the battery; and 'calculating in real time the compensation amount of the control signal of the motor according to the ...

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Номер записи: 57
14-01-2016 дата публикации

User interface for an electrically motorized vehicle

Номер: US20160011003A1
Автор: Assaf Biderman, Ruben CAGNIE
Принадлежит: Superpedestrian Inc

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. A user interface for controlling the device of the electrically motorized wheel includes at least one button displayable by the user interface to control a function associated with the device.

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Номер записи: 58
10-01-2019 дата публикации

SPRING RETURN THROTTLE ACTUATOR, METHOD OF CONTROL THEREOF AND THROTTLE ASSEMBLY

Номер: US20190011057A1
Автор: STRÅÅT Fredrik, ZAMANI Sebastian
Принадлежит: SCANIA CV AB

A spring return throttle actuator including: an electric, plural-coil DC motor having an output shaft, a throttle return spring, a gear transmission connected to the output shaft, a control unit adapted to control power supply to the DC motor, wherein the spring return throttle actuator has a movement range between closed throttle and opened throttle. The control unit is arranged to short-circuit at least two DC motor coils in order to create a DC motor return resist torque, and the return spring is balanced such that generated spring return torque over the whole movement range of the actuator does not exceed said DC motor return resist torque. The invention also relates to a method and a throttle assembly. 1. A spring return throttle actuator having a movement range between a closed throttle and an opened throttle:an electric, plural-coil DC motor having an output shaft;a throttle return spring;a gear transmission connected to the output shaft; anda control unit adapted to control power supply to the DC motor, whereinthe control unit is configured to short-circuit at least two DC motor coils of said DC motor to create a DC motor return resist torque, andwherein the return spring is balanced such that generated spring return torque over a whole movement range of the actuator does not exceed said DC motor return resist torque.2. An actuator according to claim 1 , wherein the DC motor comprises.3. An actuator according to claim 1 , wherein the control unit comprises a circuit comprising a plurality of branches claim 1 , with one branch connected to each one of the coils.4. An actuator according to claim 3 , wherein each branch of said circuit includes a transistor switch connected to each one of the coils.5. An actuator according to claim 1 , wherein at least one movement sensor is positioned to detect DC motor rotor movements.6. An actuator according to claim 5 , wherein a plurality of Hall sensors are positioned to detect DC motor rotor movements claim 5 , said ...

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Номер записи: 59
14-01-2016 дата публикации

Security for an electrically motorized vehicle

Номер: US20160012652A1
Автор: Assaf Biderman, Jon Stevens, Ruben CAGNIE
Принадлежит: Superpedestrian Inc

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. One method of protecting an electrically motorized wheel includes unlocking at least one feature of the electrically motorized wheel in response to receiving an indicator that a mobile device of the user of the electrically motorized wheel is within a predetermined proximity.

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Номер записи: 60
12-01-2017 дата публикации

Motor control system

Номер: US20170012565A1
Автор: Shohei Oi
Принадлежит: Toyota Motor Corp

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.

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Номер записи: 61
14-01-2016 дата публикации

Systems and methods for utilizing geographic positioning data for operation of an electrically motorized vehicle

Номер: US20160012723A1
Автор: Assaf Biderman, Ruben CAGNIE
Принадлежит: Superpedestrian Inc

A system, method, and device for operations of an electrically motorized vehicle. The vehicle can utilize an electrically motorized wheel to convert a non-motorized wheeled vehicle to an electrically motorized wheeled vehicle. One system includes a server in communication with the device of each of a plurality of electrically motorized wheels, the server operable to track a position of each of the electrically motorized wheels and communicate the position thereof to a transportation network.

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Номер записи: 62
15-01-2015 дата публикации

METHOD AND APPARATUS FOR MONITORING AND CONTROLLING A SYNCHRONOUS ELECTRIC MACHINE

Номер: US20150015178A1
Автор: HITI SILVA, PERISIC MILUN, Savagian Peter J., STANCU CONSTANTIN C.
Принадлежит:

Controlling a synchronous electric machine includes determining a rotor field current of a wound rotor of the synchronous electric machine and determining a time-rate change in field flux linkage. A rotor field voltage is determined based upon the time-rate change in the field flux linkage, and a rotor field resistance is determined based upon the rotor field voltage and the rotor field current. A rotor temperature is determined based upon the rotor field resistance. Operation of the synchronous electric machine is controlled responsive to a torque command and the rotor temperature. 1. Method for controlling a synchronous electric machine , comprising:determining rotor field current of a wound rotor of the synchronous electric machine;determining a time-rate change in a field flux linkage;determining a rotor field voltage based upon the time-rate change in the field flux linkage;determining a rotor field resistance based upon the rotor field voltage and the rotor field current;determining a rotor temperature based upon the rotor field resistance; andcontrolling operation of the synchronous electric machine responsive to a torque command and the rotor temperature.2. The method of claim 1 , wherein controlling operation of the synchronous electric machine comprises controlling torque output of the synchronous electric machine responsive to the torque command when the rotor temperature is less than a threshold rotor temperature.3. The method of claim 1 , wherein controlling operation of the synchronous electric machine comprises:derating a maximum torque output from the synchronous electric machine when the rotor temperature is greater than a threshold rotor temperature; andcontrolling torque output of the synchronous electric machine responsive to the torque command and the derated maximum torque output when the rotor temperature is greater than the threshold rotor temperature.5. Method for controlling a synchronous electric machine claim 1 , comprising:determining ...

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Номер записи: 63
11-01-2018 дата публикации

MOTOR CONTROL APPARATUS, SHEET CONVEYING APPARATUS, DOCUMENT FEEDING APPARATUS, DOCUMENT READING APPARATUS, AND IMAGE FORMING APPARATUS

Номер: US20180013366A1
Автор: SATO Hiroki
Принадлежит:

According to an aspect of the present invention, a motor control apparatus includes a first driving circuit connected to a motor first phase winding and having H bridge circuit first switching elements, a second driving circuit connected to second phase winding of the motor and having H bridge circuit second switching elements, first and second pulse generators. a detector, an estimator, and a selector. The first pulse generator generates a first PWM signal having a first level signal and a second level signal. The second pulse generator generates a second PWM signal having a first and a second level signal. The selector selects whether to detect a driving current flowing through the first phase winding or to estimate a driving current flowing through the first phase winding. The first pulse generator generates the first PWM signal based on a driving current value output from the detector or the estimator. 1. A motor control apparatus comprising:a first driving circuit configured to include a plurality of first switching elements of an H bridge circuit and to be connected to a winding of a first phase of a motor;a second driving circuit configured to include a plurality of second switching elements of the H bridge circuit and to be connected to a winding of a second phase of the motor;a first pulse generator configured to generate a first pulse width modulation (PWM) signal for controlling an ON operation and an OFF operation of the plurality of first switching elements, wherein the first PWM signal is constituted of a signal at a first level which is one of a high level and a low level and a signal at a second level which is another one of the high level and the low level;a second pulse generator configured to generate a second PWM signal for controlling an ON operation and an OFF operation of the plurality of second switching elements, wherein the second PWM signal is constituted of a signal at the first level and a signal at the second level and has a same cycle ...

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Номер записи: 64
10-01-2019 дата публикации

CURRENT SENSING BASED COMMUTATION CONTROL

Номер: US20190013757A1
Автор: LEMAN Dirk, Zuo Xing
Принадлежит:

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/ ...

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Номер записи: 65
19-01-2017 дата публикации

CONTROL METHOD FOR MOTOR OF ELECTRONIC BRAKE

Номер: US20170016498A1
Автор: KIM Do Kun
Принадлежит: Hyundai Mobis Co., Ltd.

Disclosed is a control method for a motor of an electronic brake. The control method for a motor of an electronic brake includes: a stop mode-starting step of starting a stop mode when a vehicle is stopped by a brake; an electrical angle-measuring step of measuring an electrical angle of a motor providing pressure to the brake in the stop mode; an electrical angle-calculating step of calculating a changed electrical angle using a predetermined electrical angle change and the electrical angle of the motor measured in the electrical angle-measuring step; and a motor-controlling step of controlling a current flowing to the motor in accordance with the changed electrical angle. Therefore, it is possible to keep a vehicle stopped, prevent a high current from flowing at any one phase of the motor, and prevent the motor from burning. 1. A control method for a motor of an electronic brake , the method comprising:a stop mode-starting step of starting a stop mode when a vehicle is stopped by a brake;an electrical angle-measuring step of measuring an electrical angle of a motor providing pressure to the brake in the stop mode;an electrical angle-calculating step of calculating a changed electrical angle using a predetermined electrical angle change and the electrical angle of the motor measured in the electrical angle-measuring step; anda motor-controlling step of controlling a current flowing to the motor in accordance with the changed electrical angle.2. The method of claim 1 , further comprising: before the stop mode-starting step claim 1 ,a brake pedal angle-sensing step of sensing an angle of a brake pedal of the vehicle;a braking step of braking the vehicle using the brake when the angle of the brake pedal exceeds 0 degree; anda vehicle speed-sensing step of sensing the speed of the vehicle to check whether the vehicle has been stopped by the braking step.3. The method of claim 1 , further comprising a target pressure-generating step of generating target pressure of the ...

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Номер записи: 66
17-01-2019 дата публикации

CLIMB ASSIST VELOCITY CONTROL

Номер: US20190017325A1
Автор: Knickrehm Morgan
Принадлежит:

A climb assist system dynamically adjusts a rate and a level of load assist that the system provides to a climber during traverse of a structure. The system includes a load sensor system configured to detect the state of the climber, such as the load applied by the climber to an assist rope, to provide an upward support force on the climber to compensate the climber's weight. Additionally, the system includes a sender configured to transmit data to a receiver of the system. The system includes a controller configured to interpret the received data and thereafter provide control through a controlled motor and drive system to provide load assist to the climber. A safety function of the system is configured to receive data indicative of a rate of descent of the climber, and slow or stop the descent if one or more conditions are met. 1. A climb assist system configured to provide load assist to a climber during movement along a vertical direction on a structure , the climb assist system comprising:an assist rope that extends along at least a portion of the structure in the vertical direction;a rope grab configured to couple the climber to the assist rope such that movement of the climber relative to the assist rope is restricted;a drive system coupled to the assist rope such that the drive system is configured to provide load assist to the assist rope;a load sensor system configured to: 1) detect a load applied to the rope grab; 2) generate a signal in response to the detected load; and 3) send a signal to the drive system to adjust the load assist provided to the assist rope.2. The climb assist system of claim 1 , wherein the load assist includes a level of assist and a rate of assist.3. The climb assist system of claim 2 , wherein the level of assist includes a force applied to the assist rope claim 2 , and the rate of assist includes a speed in the vertical direction applied to the assist rope.4. The climb assist system of claim 1 , wherein the load sensor system ...

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Номер записи: 67
19-01-2017 дата публикации

SYSTEM AND METHOD FOR LIMITING VIBRATION OF ELECTRIC MOTOR

Номер: US20170019039A1
Автор: Skinner James L.
Принадлежит: NIDEC MOTOR CORPORATION

A system and method for limiting the vibration of an electric motor so as to avoid situations in which extreme vibration may result in damage to the motor or other equipment. A motor control subsystem runs the motor in accordance with a command specifying a speed or torque. A vibration sensor, such as a three-axis accelerometer, senses a vibration of the electric motor, or, alternatively, software indirectly detects the vibration based on phase or torque ripple. Such vibration may be caused by, e.g., a broken fan blade or an accumulation of snow or ice. A control element receives data regarding the vibration, determines whether the vibration exceeds a pre-determined limit, and if so, takes action to reduce the vibration of the electric motor below the pre-determined limit. Such action may involve slowing or stopping the motor, thereby avoiding damage, increasing reliability, and reducing cost. 1. An electric motor system for limiting a vibration of an electric motor , the electric motor system comprising:the electric motor, including a shaft configured to drive a load;a motor control subsystem configured to control operation of the electric motor, including running the electric motor in accordance with a command specifying a speed or torque at which the electric motor is to be run;a vibration sensor configured to sense a characteristic of a vibration of the electric motor;an electronic control element configured to receive data from the vibration sensor regarding the characteristic of the sensed vibration, determine whether the characteristic of the sensed vibration exceeds a pre-determined limit, and if so, reduce the speed of the electric motor to reduce the vibration of the electric motor below the pre-determined limit; andan electronic memory element configured to store the pre-determined limit used by the electronic control element.2. The electric motor system as set forth in claim 1 , wherein the electric motor is a variable speed claim 1 , three-phase claim 1 ...

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Номер записи: 68
19-01-2017 дата публикации

Control apparatus for dynamically adjusting phase switching of the dc motor and method thereof

Номер: US20170019040A1
Автор: Ming-Jung Tsai
Принадлежит: Anpec Electronics Corp

Disclosed are a control apparatus for dynamically adjusting a phase switching of a DC motor and a method thereof. A rotor in the DC motor is divided into 2 M pole areas, wherein M is a positive integer not less than 1. The control apparatus comprises a phase detector, a current detector, a control circuit and a driving circuit. The phase detector detects the phase switching state of the pole areas to generate a standard phase signal. The current detector detects a current flowing through the DC motor in one of switching points of the standard phase signal to generate a current detection value. The control circuit periodically outputs 2 M drive signals, and determines to perform dynamically adjusting operation on the timing sequence of the drive signals according to the current detection value. The driving circuit receives the drive signals to perform the phase switching for driving the DC motor.

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Номер записи: 69
19-01-2017 дата публикации

CONTROLLER FOR A FREE-RUNNING MOTOR

Номер: US20170019043A1
Автор: Kok Choon Keat, RABENSTEIN Arno, Zhao Tao
Принадлежит:

A controller for controlling a multi-phase motor is described. The controller may be configured to measure a plurality of phase voltages of the multi-phase motor when the multi-phase motor is in an uncontrolled state. The controller may be configured to determine, based on the plurality of measured phase voltages, a position and a velocity of a rotor of the multi-phase motor. The velocity of the rotor includes a speed of the rotor and a direction of the rotor. The controller may be further configured to, responsive to determining that the direction of the rotor is a forward direction and the speed of the rotor satisfies a closed-loop threshold speed: set, based on the position of the rotor and the velocity of the rotor, at least one initial control condition of the rotor, and control, using closed-loop control and based on the at least one initial control condition, the rotor. 1. A controller for controlling a multi-phase motor , wherein the controller is configured to:measure a plurality of phase voltages of the multi-phase motor when the multi-phase motor is in an uncontrolled state;determine, based on the plurality of measured phase voltages, a position of a rotor of the multi-phase motor;determine, based on the plurality of measured phase voltages, a velocity of the rotor, wherein the velocity of the rotor includes a speed of the rotor and a direction of the rotor; and set, based on the position of the rotor and the velocity of the rotor, at least one initial control condition of the rotor; and', 'control, using closed-loop control and based on the at least one initial control condition, the rotor., 'responsive to determining that the direction of the rotor is a forward direction and the speed of the rotor satisfies a closed-loop threshold speed2. The controller of claim 1 , wherein the controller is further configured to: set, based on the position of the rotor and the velocity of the rotor, the at least one initial control condition of the rotor; and', 'slow, ...

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Номер записи: 70
22-01-2015 дата публикации

Electric tool

Номер: US20150022125A1
Автор: Hiroki Uchida, Nobuhiro Takano, Tetsuhiro Harada, Tomomasa Nishikawa, Yoshihiro Nakano, Yoshio Iimura
Принадлежит: HITACHI KOKI CO LTD

An electric tool for driving a tip tool, the electric tool includes: a removable battery; the brushless motor configured to generate a driving force for driving the tip tool; an inverter circuit configured to supply drive power from the removable battery to the brushless motor using a plurality of semiconductor switching elements; a controller configured to control the inverter circuit to control rotation of the brushless motor; a temperature detector configured to detect a temperature of the brushless motor or the semiconductor switching elements; and a voltage detector configured to detect a voltage of the battery. The brushless motor is driven such that a duty ratio of PWM drive signal for driving the semiconductor switching elements is determined based on relationship between the temperature detected by the temperature detector and the voltage detected by the voltage detector.

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Номер записи: 71
16-01-2020 дата публикации

LEAD ANGLE ADJUSTMENT CIRCUIT

Номер: US20200021213A1
Автор: Ogawa Takashi
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

A lead angle adjustment circuit includes a counter that receives an input signal and has an output that is connected to a multiplier circuit. The multiplier circuit has an output connected to a subtractor circuit that has an output connected to a pseudo FG generator circuit. The output of the counter is also connected to a storage register that is coupled to an addition circuit through a range determination circuit, a slope determination circuit, and a multiplier determination circuit. The input signal is input to another counter which is connected to the addition circuit through a start determination circuit and an advance angle calculation circuit. The outputs of the multiplier determination circuit and the advance angle calculation circuit are input to the addition which, which generates a signal is subtracted by the subtractor circuit to generate the signal input into the pseudo FG generator circuit. 1. A lead angle adjustment circuit , comprising:a first counter having an input and an output;a multiplier circuit having an input and an output, the input of the multiplier circuit coupled to the output of the first counter;a subtractor circuit having a first input, a second input, and an output, the first input of the subtractor coupled to the output of the multiplier circuit;a storage register having an input and an output, the input of the storage register coupled to the output of the first counter;a slope determination circuit having a first input, a second input, and an output, the first input of the slope determination circuit coupled to the output of the register and the second input of the slope determination circuit coupled for receiving a first control signal;a multiplier determination circuit having a first input, a second input, and an output, the output of the multiplier circuit coupled to the second input of the subtractor circuit and the second input of the multiplier circuit coupled for receiving a second control signal; andan addition circuit ...

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Номер записи: 72
10-02-2022 дата публикации

ELECTRIC VEHICLE

Номер: US20220041062A1
Автор: Amano Hiroyuki, EBUCHI Hiroaki, Imamura Tatsuya, ISAMI Yoichiro, ITOU Yoshio, KODERA Hiroaki, Nishimine Akiko
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

The electric vehicle according to the present disclosure calculates motor torque using an MT vehicle model simulating an MT vehicle having a manual transmission and an internal combustion engine. In the first operation mode, an operation amount of a pseudo-clutch pedal and a shift position of a pseudo-gearshift are input to the MT vehicle model to reflect operation of the pseudo-clutch pedal and operation of the pseudo-gearshift in electric motor control. In the second operation mode where the operation of the pseudo-clutch pedal is not needed, an operation amount of a clutch pedal calculated by a driver model is input to the MT vehicle model instead of the operation amount of the pseudo-clutch pedal. 1. An electric vehicle configured to use an electric motor as a power device for traveling , the electric vehicle comprising:an accelerator pedal;a pseudo-clutch pedal;a pseudo-gearshift;an operation mode selector configured to switch an operation mode between a first operation mode and a second operation mode, the first operation mode reflecting operation of the pseudo-clutch pedal and operation of the pseudo-gearshift in control of the electric motor, the second operation mode not requiring the operation of the pseudo-clutch pedal for the control of the electric motor; anda controller configured to control a motor torque output by the electric motor in accordance with the operation mode selected by the operation mode selector, [ an MT vehicle model simulating a torque characteristic of a driving wheel torque in an MT vehicle having an internal combustion engine whose torque is controlled by operation of a gas pedal and a manual transmission whose gear stage is switched by operation of a clutch pedal and operation of a gearshift; and', 'a first driver model simulating the operation of the clutch pedal of an exemplary driver driving the MT vehicle; and, 'a memory configured to store, [ a process of receiving an operation amount of the accelerator pedal as an input of ...

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Номер записи: 73
26-01-2017 дата публикации

POWER STEERING DEVICE AND CONTROL DEVICE FOR POWER STEERING DEVICE

Номер: US20170025973A1
Автор: KASHIMA Masaki, OTA Hiroyuki, SUGIYAMA Yoshitaka
Принадлежит: Hitachi Automotive Systems, Ltd.

Provided are a power steering device and a control device for a power steering device, which are capable of reducing power consumption. The power steering device includes a current detection number setting circuit configured to set the number of times of detection of a DC bus current value by a current detecting circuit to a first predetermined number over a first predetermined cycle of a PWM period when the steering-state signal indicative of a steering operation state is received, and to set the number of times of detection so that the number of times of detection becomes smaller than the first predetermined number over the first predetermined cycle of the PWM period when a steering-state signal indicative of a non-steered state is received. 1. A power steering device , comprising:a steering mechanism configured to steer steered wheels in accordance with a steering operation of a steering wheel;a three-phase brushless motor configured to apply a steering force to the steering mechanism;a control device configured to control drive of the three-phase brushless motor;a command current computing unit provided in the control device, and configured to compute a command current value to the three-phase brushless motor based on an operating state of a vehicle;a PWM control unit provided in the control device, and configured to output PWM duty signals respectively to a u-phase, a v-phase, and a w-phase of the three-phase brushless motor in accordance with the command current value;a bridge circuit provided in the control device, the bridge circuit being constructed of a switching circuit whose drive is to be controlled by the PWM duty signals and being configured to control the drive of the three-phase brushless motor;a current sensor provided to a DC bus connected to the bridge circuit, and configured to detect a DC bus current value flowing through the DC bus;a current detecting circuit provided in the control device, and configured to detect, through the current sensor, ...

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Номер записи: 74
25-01-2018 дата публикации

Motor Control Circuit, Motor Drive Control Apparatus And Control Method Of Motor Drive Control Apparatus

Номер: US20180026558A1
Автор: KATAYAMA Keiichi
Принадлежит:

A motor control circuit comprising a speed control circuit configured to output speed command information relating to the rotational speed of a motor based on target information relating to a target rotational speed and rotational speed detection information of the rotational speed of the motor, a drive stop control circuit configured to output a first drive stop control signal for performing braking control of the motor or a second drive stop control signal for performing free-run stop control of the motor based on the rotational speed detection information and the speed command information when input of the target information is stopped, and a drive signal generation circuit configured to generate a drive control signal for driving the motor based on the first drive stop control signal or the second drive stop control signal when the first drive stop control signal or the second drive stop control signal is output. 1. A motor control circuit comprising:a speed control circuit configured to output speed command information relating to a rotational speed of a motor based on target information relating to a target rotational speed and rotational speed detection information of the rotational speed of the motor;a drive signal generation circuit configured to generate a drive control signal for driving the motor based on the speed command information; anda drive stop control circuit configured to output a first drive stop control signal for performing braking control of the motor or a second drive stop control signal for performing free-run stop control of the motor based on the rotational speed detection information and the speed command information when input of the target information is stopped,wherein the drive stop control circuit outputs the first drive stop control signal based on a detection result that the speed command information is equal to or less than a predetermined value, and the rotational speed of the motor is equal to or less than a predetermined ...

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Номер записи: 75
24-01-2019 дата публикации

OUTRUNNER MOTOR IN CORDLESS POWER TOOL

Номер: US20190028003A1
Автор: McClung Mark T., Seith Warren A.
Принадлежит:

An illustrative embodiment of a power tool is provided. The power tools include a housing that extends along a longitudinally extending axis; an outrunner motor located within the housing; the outrunner motor includes an outboard rotating rotor that rotates around a stator portion of the outrunner motor; and a rotating shaft that is attached to the outboard rotating rotor and disposed through the stator portion; wherein the rotating shaft attaches to rotating structures that rotate an output drive. 1. Power tool comprising:a housing that extends along a longitudinally extending axis;an outrunner motor located within the housing;wherein the outrunner motor includes an outboard rotating rotor that rotates around a stator portion of the outrunner motor; anda rotating shaft is attached to the outboard rotating rotor and disposed through the stator portion;wherein the rotating shaft attaches to rotating structures that rotate an output drive.2. The power tool of claim 1 , further comprising at least one battery to power the outrunner motor.3. The power tool of claim 1 , wherein the power tool is selected from the group consisting of an impact tool claim 1 , drill claim 1 , oil-pulse driver claim 1 , angle impact driver claim 1 , steel rod cutter claim 1 , metal shear claim 1 , die grinder claim 1 , plate joiner claim 1 , multi tool claim 1 , jig saw claim 1 , and reciprocating saw.4. The power tool of claim 1 , wherein the outrunner motor is a brushless direct-current motor.5. The power tool of claim 1 , wherein the rotating shaft rotated by the outboard rotating rotor extends to at least one gear.6. The power tool of claim 5 , wherein the at least one gear is a plurality of gears.7. The power tool of claim 6 , wherein the plurality of gears drive a hammer and anvil mechanism that is part of an impact tool claim 6 , wherein the anvil drives the output drive.8. The power tool of claim 1 , wherein the rotating shaft is attached to the outboard rotating rotor by a drive ...

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Номер записи: 76
24-01-2019 дата публикации

MACHINE LEARNING DEVICE, SERVO MOTOR CONTROL DEVICE, SERVO MOTOR CONTROL SYSTEM, AND MACHINE LEARNING METHOD

Номер: US20190028043A1
Автор: OHO Yusaku, SONODA Naoto
Принадлежит:

A machine learning device is configured to perform machine learning with respect to a servo motor control device including a non-linear friction compensator that creates a compensation value with respect to non-linear friction on the basis of a position command, the machine learning device including: a state information acquisition unit configured to acquire state information including a servo state including position error, and combination of compensation coefficients of the non-linear friction compensation unit, by causing the servo motor control device to execute a predetermined program; an action information output unit configured to output action information including adjustment information of the combination of compensation coefficients; a reward output unit configured to output a reward value in reinforcement learning, based on the position error; and a value function updating unit configured to update an action value function on the basis of the reward value, the state information, and the action information. 1. A machine learning device configured to perform machine learning with respect to a servo motor control device comprising a non-linear friction compensation unit configured to create a compensation value with respect to non-linear friction on the basis of a position command , the machine learning device comprising:a state information acquisition unit configured to acquire state information from the servo motor control device by causing the servo motor control device to execute a predetermined program, the state information including a servo state including at least position error, and a combination of compensation coefficients of the non-linear friction compensation unit;an action information output unit configured to output action information including adjustment information of the combination of compensation coefficients included in the state information, to the servo motor control device;a reward output unit configured to output a reward value in ...

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Номер записи: 77
24-01-2019 дата публикации

SYSTEMS AND METHODS FOR OPERATING MOTORS WITH A SINGLE MOTOR POSITION SIGNAL

Номер: US20190028044A1
Автор: Ochs David S., Secrest Caleb W., SON YO CHAN
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Systems and method for operating motors are provided. In an exemplary embodiment, a method for operating a motor includes receiving a first output corresponding to a motor angular position. The method further includes synthesizing a synthesized second output from the first output and from an estimated motor angular velocity. The method also includes calculating the motor angular position from the first output and the synthesized second output. The method includes estimating the motor angular velocity from the motor angular position. Further, the method includes operating the motor to produce torque based on the motor angular position and the motor angular velocity. 1. A method for operating a motor , the method comprising:receiving a first output corresponding to a motor angular position;synthesizing a synthesized second output from the first output and from an estimated motor angular velocity;calculating the motor angular position from the first output and the synthesized second output;estimating a motor angular velocity from the motor angular position; andoperating the motor to produce torque based on the motor angular position and the motor angular velocity.2. The method of wherein the first output corresponding to the motor angular position is a sine envelope signal or a cosine envelope signal.3. The method of wherein a vector-based position sensor coupled to the motor provides the first output.4. The method of wherein the first output is created by a resolver claim 1 , a magneto-resistive sensor claim 1 , a Hall effect sensor claim 1 , or an eddy current sensor.5. The method of further comprising:receiving a second output corresponding to the motor angular position;determining that the first output is not faulted; anddetermining that the second output is faulted.6. The method of wherein a quadrature envelope generator synthesizes the synthesized second output from the first output and the estimated motor angular velocity.7. The method of wherein the quadrature ...

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Номер записи: 78
29-01-2015 дата публикации

THREE-PHASE INVERTER CONTROL FOR ELECTRIFIED VEHICLES

Номер: US20150032311A1
Автор: Cheng Bing, Shao Baiming
Принадлежит:

Techniques are presented for more efficient three-phase inverter control for electrified vehicles (EVs). The techniques can be executed by a controller of an EV that includes one or more processors. Specifically, the techniques include closed-loop discontinuous pulse-width modulation (DPWM) control of a three-phase inverter based on electric motor current feedback. The three-phase inverter control techniques can be further based on electric motor/rotor position feedback. Based on the feedback, the techniques can select one of a plurality of zero-voltage vectors in real-time. The selected zero-voltage vector can be used when generating duty cycles for switching of the three-phase inverter, which can result in decreased switching losses and increased efficiency of the three-phase inverter. 1. A method , comprising:determining, at a controller of an electrified vehicle (EV), the controller including one or more processors, three-phase AC currents at an electric motor of the EV, wherein the EV includes a three-phase inverter configured to convert a direct current (DC) from a battery system of the EV to the three-phase AC currents for the electric motor of the EV;determining, at the controller, a rotational position of the electric motor;determining, at the controller, an output voltage vector based on the three-phase AC currents, reference currents, and the rotational position of the electric motor, wherein the reference currents are based on a torque request for the electric motor, a speed of the electric motor, and a DC voltage output by the battery system;selecting, at the controller, one of two zero-voltage vectors for the three-phase inverter based on the output voltage vector; andcontrolling, by the controller, switching of the three-phase inverter using the zero-voltage vector.2. The method of claim 1 , further comprising converting claim 1 , at the controller claim 1 , the three-phase AC currents to a stationary reference frame based on the rotational position ...

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Номер записи: 79
28-01-2021 дата публикации

BRUSHLESS MOTOR HAVING SIX-STEP COMMUTATION CONTROL

Номер: US20210028729A1
Автор: Cox John D.
Принадлежит:

A power tool is provided including: an electric brushless direct current (BLDC) motor having a rotor and a stator. The stator includes at least six teeth including a first set of teeth on which a first set of stator windings are wound and a second set of teeth on which a second set of stator windings are wound. The first and second sets of stator windings are alternatingly arranged relative to the stator. The first set of stator windings is connected in a wye configuration and the second set of stator windings is connected in delta configuration. 1. A power tool comprising:an electric brushless direct current (BLDC) motor having a rotor and a stator, the stator including at least six teeth including a first set of teeth on which a first set of stator windings are wound and a second set of teeth on which a second set of stator windings are wound;a power unit electrically connected between a power source and the motor and configured to output at least six voltage signals to the motor; anda controller configured to control a switching operation of the power unit via at least six drive signals to regulate a supply of power from the power source to the motor,wherein first and second sets of stator windings are alternatingly arranged relative to the stator, and wherein the first set of stator windings is connected in a wye configuration and the second set of stator windings is connected in delta configuration.2. The power tool of claim 1 , wherein the power unit includes a first switch circuit connected electrically to the first set of stator windings and a second switch circuit connected electrically to the second set of windings of the plurality of windings.3. The power tool of claim 2 , wherein the controller is configured to drive the first switch circuit and the second switch circuit using a six-phase commutation sequence.4. The power tool of claim 2 , wherein drive signals for the first switch signal are advanced by a lead angle compared to drive signals for the ...

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Номер записи: 80
04-02-2021 дата публикации

BRAKING SYSTEM ANDMETHOD FOR PROVIDING AN EXTRA TORQUE FROM A MOTOR TO A BRAKE PEDAL

Номер: US20210031740A1
Автор: Bieltz Karsten, Harkati Hind, Herve Benoit, Schaefer Patrick Christian, Zhu James
Принадлежит:

System () and method () for providing an extra torque from a motor () to a brake pedal (). The system comprises a brake pedal () having an input rod; a motor (); a sensor (); and an electronic controller () configured to receive a velocity of the input rod of the brake pedal () from the sensor (), determine a torque ratio based on the velocity, determine a differential stroke of the brake pedal (), determine a torque offset based on the differential stroke, determine an extra torque based on the torque ratio and the torque offset, and control the motor () to apply the extra torque to the brake pedal (). 1. A braking system for providing an extra torque from a motor to a brake pedal , the system comprising:a brake pedal including an input rod;a motor;a sensor; andan electronic controller configured toreceive a velocity of the input rod of the brake pedal from the sensor,determine a torque ratio based on the velocity,determine a differential stroke of the brake pedal,determine a torque offset based on the differential stroke, determine an extra torque based on the torque ratio and the torque offset, andcontrol the motor to apply the extra torque to the brake pedal.2. The system of claim 1 , wherein the differential stroke is determined as a displacement of the brake pedal.3. The system of claim 1 , wherein the differential stroke is determined as a displacement of the brake pedal beyond a reference point in the braking system.4. The system of claim 1 , wherein the velocity of the input rod is determined after a reference point in the braking system.5. The system of claim 1 , wherein a maximum torque offset is set by a user.6. The system of claim 5 , wherein if the electronic controller determines that the torque offset would be greater than the maximum torque offset claim 5 , the electronic controller uses the maximum torque offset to determine the extra torque.7. The system of claim 1 , wherein the extra torque smooths operation of the brake pedal.8. The system of ...

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Номер записи: 81
04-02-2016 дата публикации

Method for Starting a Variable-Speed Electric Motor

Номер: US20160036356A1
Автор: Daniel Gontermann, Joachim Schullerer, Jochen Schaab, Manfred Oesterle
Принадлежит: Ksb Ag

The invention relates to a method for starting a variable-speed electric motor, wherein upon detection of locking of the motor shaft a positive torque is applied to the motor shaft, and wherein the positive torque is continuously modified with different frequencies to overcome the locking.

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Номер записи: 82
05-02-2015 дата публикации

Determination method and a control method for a fluid displacement device, controller and system

Номер: US20150037169A1
Автор: Beekmans Robert, VELTMAN André
Принадлежит:

The fluid flow of a fluid displacement device () provided with an electric motor () may be set on the basis of a power and control unit (). Thereto, a power circuit generally comprising an inverter (), such as a frequency inverter, drives the electric motor (), particularly with a driving voltage (D). Voltage and current (A A) in the electric motor () are sensed sensorless. Torque and rotation speed of the electric motor () are derived from said sensed voltage and current (A A). A fluid flow of the fluid displacement device () is estimated in an estimator () based on said torque and rotation speed of the electric motor () and at least some fluid displacement device characteristics stored in a memory. An operation speed of the electric motor () based on said estimated fluid flow is defined and may be transmitted to the inverter () 137-. (canceled)38. A power and control unit for operation control of a fluid displacement device that is provided with an electric motor and with a hermetic ammonia-resistant enclosure , said power and control unit comprising:a power circuit for driving the electric motor, wherein the power circuit comprises a power supply unit providing a direct current output (dc voltage) and an inverter inverting said dc voltage into at least one driving voltage, wherein the at least one driving voltage is defined by said at least one control signal to the inverter;a means for determining torque and rotation speed of the electric motor;a memory for storage of characteristics of the fluid displacement device;an estimator for estimating a fluid flow of the fluid displacement device based on said torque and rotation speed of the electric motor and at least one characteristic of the fluid displacement device; and 'wherein said means for determining torque and rotation speed comprises:', 'processor means for defining at least one control signal to said power circuit based on said determined fluid flow, therewith controlling operation of the fluid ...

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Номер записи: 83
01-02-2018 дата публикации

MOTOR DRIVER WITH MULTIPURPOSE PIN

Номер: US20180034389A1
Автор: HARASHIMA Takashi, KUMAZAWA Fumio
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

In an embodiment, a motor driver comprises a multipurpose pin operable to couple the motor driver to a controller and judgment logic coupled to the multipurpose pin. The motor driver is operable to receive an input signal via the multipurpose pin and may be operable in a normal operation mode or a setting operation mode. The judgment logic may be operable to detect whether a prescribed pattern is present in the input signal, wherein the prescribed pattern indicates one of the normal operation mode or the setting operation mode, control at least a portion of the motor driver to operate in the setting operation mode when the prescribed pattern is detected in the input signal, and control at least the portion of the motor driver to operate in the normal operation mode when the prescribed pattern is not detected in the input signal. 1. A motor driver , comprising:a multipurpose pin operable to couple the motor driver to a controller; andjudgment logic coupled to the multipurpose pin,wherein the motor driver is operable to receive an input signal via the multipurpose pin,wherein the motor driver is operable in a normal operation mode or a setting operation mode, and detect whether a prescribed pattern is present in the input signal, wherein the prescribed pattern indicates one of the normal operation mode or the setting operation mode;', 'control at least a portion of the motor driver to operate in the setting operation mode when the prescribed pattern is detected in the input signal; and', 'control at least the portion of the motor driver to operate in the normal operation mode when the prescribed pattern is not detected in the input signal., 'wherein the judgment logic is operable to2. The motor driver of claim 1 , wherein the judgment logic comprises:an edge detector;a timer circuit;a period counter coupled to the edge detector;an edge frequency counter coupled to the edge detector;a pattern detector coupled to the edge detector, the timer circuit, the period counter, ...

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Номер записи: 84
01-02-2018 дата публикации

POWER SUPPLY AND DRIVE DEVICE FOR A PERMANENT MAGNET ELECTRIC MOTOR

Номер: US20180034393A1
Автор: Calvini Marco, Venturini Marco
Принадлежит:

Power supply and drive device for a permanent magnet motor comprising a full-wave voltage rectifier stage, which can be supplied with an alternating current voltage to provide a rectified voltage, a power factor corrector stage, a smoothing capacitor to provide a direct current voltage and a motor drive stage, which is supplied with the direct current voltage and provides a signal indicating the power required by the motor. The smoothing capacitor is not of the electrolytic type and the power factor corrector stage has feedback control means to generate a reference current as a function of the direct current voltage and of the signal indicating the power required and to control an input current of the power factor corrector stage as a function of the reference current. 114567251151611. A power supply and drive device for a permanent magnet electric motor , the device () comprising a full-wave voltage rectifier stage () , which can be supplied with an alternating current voltage (VAC) to provide a rectified voltage (VR) , a power factor corrector stage () , at least one smoothing capacitor () to provide a direct current voltage (VDC) and a motor drive stage () , which is supplied with said direct current voltage (VDC) and is designed to provide a first signal (P) indicating a measure of the power required by the motor (); the power factor corrector stage () comprising feedback control means () , which are designed to generate a reference current (IREF) as a function of said direct current voltage (VDC) and to control an input current (IPFC) of the power factor corrector stage () as a function of the reference current (IREF); the device () being characterized in that said smoothing capacitor () is not of the electrolytic type and in that said feedback control means () are designed to generate said reference current as a function of said first signal (P).26. A device according to claim 1 , wherein said smoothing capacitor () is a metallized film capacitor. ...

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Номер записи: 85
01-02-2018 дата публикации

FAN MOTOR BRAKING APPARATUS AND THE CONTROL METHOD THEREOF

Номер: US20180034405A1
Автор: Chao Yun-Hua, Chen Po-Tsun, CHO Yi-Chieh, TSENG Wei-Shuo, WU Chia-Feng
Принадлежит:

A fan motor braking apparatus is provided. The fan motor braking apparatus includes a fan motor, a conversion circuit and a motor driver circuit. The conversion circuit is respectively and electrically connected to the fan motor and the motor driver circuit. The conversion circuit includes bridge structures. After the fan motor starts operating, the motor driver circuit receives at least one fan status signal and determines whether the fan motor braking apparatus enters a braking status or not according to the at least one fan status signal. When the fan motor braking apparatus enters the braking status, the motor driver circuit outputs a braking control signal to the conversion circuit so that the bridge structures of the conversion circuit generate a brake effect on fan motor, wherein the at least one fan status signal includes an external speed-control signal and a transition voltage signal of the fan motor. 1. A fan motor braking apparatus , comprising:a fan motor;a conversion circuit, electrically connected to the fan motor and comprising a plurality of bridge structures; anda motor driving IC, electrically connected to the conversion circuit and receiving at least one fan status signal, wherein after the fan motor starts operating, the motor driving IC determines whether the fan motor braking apparatus is in a brake status or not according to the at least one fan status signal;wherein when the fan motor braking apparatus is in the brake status, the motor driving IC outputs a brake control signal to the conversion circuit so that the bridge structures of the conversion circuit turn on to stop the fan motor; andwherein the at least one fan status signal comprises an external speed-control signal or at least one conversion voltage signal from the fan motor.2. The fan motor braking apparatus of claim 1 , electrically connected to a power source claim 1 , the power source provides a supply voltage signal to the motor driving IC claim 1 , wherein the motor driving ...

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Номер записи: 86
30-01-2020 дата публикации

Ac power adapter having a switchable capacitor

Номер: US20200036307A1
Автор: Pradeep M. Pant
Принадлежит: Black and Decker Inc

A power adapter is provided to supply electric power from an alternating current from an alternating current (AC) power supply to a powered apparatus. It includes a switchable capacitor circuit housed within a housing and including: a first switch path associated with a positive half cycle of the alternating current and a second switch path associated with a negative half cycle of the alternating current, both coupled across the AC power supply. Each switch path includes a switchable capacitor in series with a switch.

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Номер записи: 87
30-01-2020 дата публикации

AC POWER ADAPTER HAVING A SWITCHABLE CAPACITOR

Номер: US20200036308A1
Автор: Pant Pradeep M.
Принадлежит:

A power adapter is provided to supply electric power from an alternating current from an alternating current (AC) power supply to a powered apparatus. It includes a switchable capacitor circuit housed within a housing and including a switchable capacitor switchably coupled across the AC power supply and a H-bridge circuit including four switches. An OFF-state of the four switches creates a charging path for the switchable capacitor, an ON-state of a first pair of the four switches creates a discharge path for the switchable capacitor during a positive half cycle of the alternating current, and an ON-state of a second pair of the four switches creates a discharge path for the switchable capacitor during a negative half cycle of the alternating current. 1. A power system configured to receive an alternating current from an alternating current (AC) power supply , the power tool system comprising:an electric motor;a switching circuit having a plurality of motor switches connected electrically between the AC power supply and the electric motor to regulate supply of power to the electric motor; anda switchable capacitor circuit comprising a switchable capacitor switchably coupled across the AC power supply and a H-bridge circuit including four switches, wherein an OFF-state of the four switches creates a charging path for the switchable capacitor, an ON-state of a first pair of the four switches creates a discharge path for the switchable capacitor during a positive half cycle of the alternating current, and an ON-state of a second pair of the four switches creates a discharge path for the switchable capacitor during a negative half cycle of the alternating current.2. The power system of claim 1 , further comprising a rectifier arranged between the AC power supply and the switching circuit to output a rectified signal on a DC power bus line.3. The power system of claim 2 , further comprising a DC bus capacitor electrically coupled in parallel with the rectifier and ...

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Номер записи: 88
12-02-2015 дата публикации

Motor driving device

Номер: US20150042250A1
Автор: Noboru Takizawa, Tetsuo Yamato
Принадлежит: ROHM CO LTD

A motor driving device includes a logic unit configured to control an electrical conduction of a motor, a reference clock signal generating unit configured to generate a reference clock signal based on a rotational speed indication signal, a rotational speed signal generating unit configured to generate a rotational speed signal based on a rotational speed of the motor, and a rotational speed feedback control unit configured to receive the reference clock signal and the rotational speed signal and control the logic unit so that the rotational speed of the motor reaches a target value. The rotational speed feedback control unit changes a feedback gain in response to the rotational speed signal.

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Номер записи: 89
04-02-2021 дата публикации

BRUSHLESS DC MOTOR CONTROL UNIT

Номер: US20210036637A1
Автор: KONG Ming Leong, KWOK Pat On, NIEH Cheng Chen, Wong Wai Man
Принадлежит:

An electrical switch unit for use with a variable speed electrical device includes a housing for a pair of electrical switching contacts, and an actuator operably connected with one of those contacts. A signaling module is associated with the electrical switch unit, and has signaling circuitry for sensing the movement of the actuator and outputting a signaling module signal indicative of the sensed movement or position of the actuator. A power module with a power switching device controllably supplies power from the DC power source to the DC motor at a speed corresponding to the sensed movement or position of the actuator. A control module receives the signaling module signal, and outputs a control module signal to control the power module. 1. An electrical switch unit for use with a variable speed electrical device to control operation of a DC motor of the electrical device , the electrical switch unit comprising:a housing which houses a pair of electrical switching contacts, and, an actuator operably connected with at least one of the pair of electrical switching contacts, the actuator being configured for movement relative to the pair of electrical switching contacts in response to operation of a finger-operable trigger so as to arrange the pair of electrical switching contacts into at least one of a closed configuration wherein power is able to be supplied from the DC power source to the DC motor via the pair of electrical switching contacts, and, an opened configuration wherein power is not able to be supplied from the DC power source to the DC motor via the pair of electrical switching contacts;a signaling module associated with the electrical switch unit comprising signaling circuitry for sensing the movement of the actuator and outputting a signaling module signal indicative of the sensed movement or position of the actuator;a power module comprising at least one power switching device for controllably supplying power from the DC power source to the DC motor ...

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Номер записи: 90
07-02-2019 дата публикации

ELECTRICALLY POWERED TOOL

Номер: US20190039227A1
Автор: NAKAYAMA Kyouichi, Takeda Yuuki
Принадлежит: Koki Holdings Co., Ltd.

A rectifier circuit for rectifying an AC voltage supplied from a commercial power supply into a DC voltage, a smoothing capacitor for smoothing the output of the rectifier circuit, and an electrically powered tool for supplying the smoothed pulsating DC voltage to a motor by an inverter circuit, wherein when the motor is driven while no load is being applied to a tip tool, the smoothed DC voltage repeatedly generates a maximal value and a minimum value so as to synchronize with the fluctuation in the AC voltage. During no-load rotation, control is performed so that driving is performed at a value that is less than a threshold value Dfor the duty ratio at which the generation of a gear sound starts in any of the speed dial setting values -. It is thereby possible to suppress a gear sound generated by a power transmission mechanism during no-load rotation. 1. An electrically powered tool comprising:a rectifier circuit configured to rectify an AC voltage supplied from a commercial power supply to a pulsating DC voltage,a smoothing circuit having a smoothing capacitor configured to reduce a pulsation state of the pulsating DC voltage,a circuit configured to supply the smoothed DC voltage to a motor, anda power transmission mechanism configured to transmit a driving force of the motor to a tip tool,wherein a current continuously flows to the motor when the motor is driven in a state in which no load is applied to the tip tool, and in a state in which a load is applied to the tip tool, when the load applied to the tip tool is increased, the current flowing to the motor becomes intermittent.2. The electrically powered tool according to claim 1 , wherein the power transmission mechanism comprises a deceleration mechanism using a plurality of gears.3. The electrically powered tool according to claim 1 , wherein a switching element provided between the smoothing circuit and the motor and configured to control a voltage supplied to the motor claim 1 , and a controller ...

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Номер записи: 91
11-02-2016 дата публикации

CONTROL SYSTEM FOR ROTARY ELECTRIC MACHINE AND METHOD FOR CONTROLLING THE SAME

Номер: US20160043677A1
Автор: KADOTA Takanori, MIURA Tetsuya, YAGYU Yasuhide
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

A rotary electric machine control system includes a controller , and a rotor including a first rotor element and a second rotor element which are rotatable inside of the stator and disposed to be separated from each other in axial direction. The first rotor element includes a first magnet and is fixed to a rotary shaft . The second rotor element includes a second magnet, and is rotatably provided to the rotary shaft . The controller performs vector control of the stator coil current for transition of an inter-rotor phase, a relative phase difference of the second rotor element in relation to the first rotor element 1. A control system comprising: a stator including stator coils which are disposed at plural positions in circumferential direction,', 'a rotor including a first rotor element and a second rotor element which are rotatable inside of the stator and disposed to be separated from each other in axial direction, the first rotor element including a plurality of first magnets with different polarities disposed alternately in the circumferential direction, the first rotor element being fixed to a rotary shaft, the second rotor element including a plurality of second magnets with different polarities disposed alternately in the circumferential direction, the second rotor element being rotatably provided to the rotary shaft; and, 'a rotary electric machine includinga controller configured to control a stator coil current, the controller being configured to perform vector control of the stator coil current for transition of an inter-rotor phase that is a relative phase difference of the second rotor element in relation to the first rotor element.2. The control system according to claim 1 , whereinthe controller is configured to perform vector control of the stator coil current, so as to achieve a transition of at least the inter-rotor phase from the inter-rotor phase in a polar reverse state to the inter-rotor phase in a polar same state,the polar reverse state is a ...

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Номер записи: 92
18-02-2016 дата публикации

ELECTRONIC CEILING FAN CONTROL SYSTEM AND METHOD OF USE

Номер: US20160047391A1
Автор: McPherson Matthew, Tarr Jeremy
Принадлежит:

A ceiling fan includes a fan motor housing; a motor positioned within the motor housing; a plurality of fan blades rotatable by the motor; a fan controller and a wired remote control. The fan controller includes a printed circuit board (PCB) having a wireless communication module and an electronic circuit coupled with the wireless communication module and is configured to control the motor to rotate the plurality of fan blades. The wired remote control device is coupled to the printed circuit board and is configured to send user selected signals to the electronic circuit on a first frequency. The electronic circuit is configured to be responsive to signals from the wired remote control device on the first frequency and to be responsive to signals from the wireless communication module on a second frequency. 1. A control for a ceiling fan comprising:a printed circuit board (PCB) having a wireless communication module and an electronic circuit coupled with the wireless communication module and configured to operate a ceiling fan; anda wired remote control device coupled to the printed circuit board and configured to send user selected signals to the electronic circuit on a first frequency;wherein the electronic circuit is configured to be responsive to signals from the wired remote control device on the first frequency and to be responsive to signals from the wireless communication module on a second frequency.2. The control of wherein the wired remote control device includes an isolated discrete digital interface for communication to the electronic circuit of the printed circuit board.3. The control of wherein the isolated digital interface includes a capacitive or inductive isolation barrier.4. The control of wherein the wired remote control device is removably attached to the printed circuit board.5. The control of wherein the wired remote control further includes a jack plug connector claim 1 , a user interface claim 1 , and an electronic cable coupled ...

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Номер записи: 93
24-02-2022 дата публикации

Motor control device

Номер: US20220060138A1
Автор: Haruka Miyano, Jun Yamada, Kouji Sakaguchi, Seiji Nakayama
Принадлежит: Denso Corp

A motor control device controls a drive of a motor having a coil, and includes a drive circuit and a control unit. The drive circuit has a plurality of switching elements, and switches the energization of the coil. The control unit includes an energization control part and a current limit part. The energization control part accelerates and then decelerates the motor, and controls energization of the coil so that a rotation position of the motor stops at a target rotation position. The current limit part limits the current during a deceleration control.

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Номер записи: 94
06-02-2020 дата публикации

ROTATION-TYPE MANIPULATION DEVICE, CONTROL METHOD FOR THE SAME, AND PROGRAM

Номер: US20200043304A1
Автор: Wakuda Hiroshi
Принадлежит:

A control signal is corrected according to the time-varying change of the detection value of a rotational angle, detected in a rotational angle sensor, of a manipulation member so that correction torque that makes the apparent inertia moment of the manipulation member different from intrinsic inertia moment is added to control torque. When the apparent inertia moment of the manipulation member is made different from intrinsic inertia moment, this apparent inertia moment can be made to adapt to the appearance of the texture of the manipulation member. Therefore, it is possible to efficiently reduce inconsistency in manipulation feeling due to the difference between the appearance of the texture of the manipulation member and a load felt in an actual manipulation. 1. A rotation-type manipulation device comprising:a manipulation member that is rotatable according to a rotation manipulation;a torque generator that generates control torque used to drive rotation of the manipulation member or apply a brake to the rotation in response to a received control signal;a rotational angle sensor that detects a rotational angle of the manipulation member;a control signal creating unit that creates the control signal matching a detection value of the rotational angle detected in the rotational angle sensor; anda first correcting unit that corrects the control signal according to a time-varying change of the detection value of the rotational angle so that correction torque that makes apparent inertia moment of the manipulation member for the rotation manipulation different from intrinsic inertial moment is added to the control torque.2. The rotation-type manipulation device according to claim 1 , wherein the first correcting unit calculates angular acceleration of the manipulation member according to the detection value of the rotational angle claim 1 , and corrects the control signal so that the correction torque matching first inertia torque inferred according to inertia moment of ...

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Номер записи: 95
06-02-2020 дата публикации

ROTATION-TYPE MANIPULATION DEVICE, CONTROL METHOD FOR THE SAME, AND PROGRAM

Номер: US20200043305A1
Автор: Wakuda Hiroshi
Принадлежит:

Braking torque based on a friction force is increased in a pulse state in a transition area in which control torque changes from a direction to encourage the rotation of a manipulation member to a direction to suppress the rotation. This braking torque based on a friction force does not cause vibration unlike the driving torque of an electric motor even if the braking torque is steeply increased. Therefore, when the rotational angle passes through the transition area, a clearer click feeling can be generated without a change like vibration being caused in control torque. When the manipulation member is rotated fast, the braking torque in a pulse state is likely to be felt as vibration. 1. A rotation-type manipulation device comprising:a manipulation member that is rotatable according to a rotation manipulation;a rotational angle sensor that detects a rotational angle of the manipulation member;a driving machine that drives rotation of the manipulation member;a braking machine that applies a brake to the rotation of the manipulation member by using a friction force; anda controller that controls control torque, which is a sum of driving torque of the driving machine and braking torque of the braking machine, according to the rotational angle detected in the rotational angle sensor; wherein changes a direction of the control torque from an encouragement direction to encourage the rotation of the manipulation member to a suppression direction to suppress the rotation as the rotational angle changes in one direction, and', 'increases, when the rotational angle passes through a transition area in which the control torque changes from the encouragement direction to the suppression direction, the braking torque in a pulse state., 'the controller2. The rotation-type manipulation device according to claim 1 , wherein:in a range in which the rotational angle is changeable, a plurality of segments, each of which includes the transition area, is set; andin each of the plurality ...

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Номер записи: 96
08-05-2014 дата публикации

METHOD AND APPARATUS FOR REDUCING TORQUE VARIATION IN MOTOR DRIVE SYSTEMS

Номер: US20140125258A1
Автор: Fulton David A.
Принадлежит: REMY TECHNOLOGIES, L.L.C.

A method for controlling a specific electric machine includes receiving with a controller a back electromotive force (BEMF) coefficient for the specific electric machine. The controller is configured to control operation of an inverter coupled to the electric machine where the inverter is configured to provide or receive multi-phase electricity to or from the electric machine in motor mode or generator mode, respectively. The method further includes receiving with the controller an input related to a selected torque to be applied by or a selected power to be removed from the electric machine. The method further includes determining a first electrical parameter the inverter is to apply to in motor mode or a second electrical parameter the inverter is to convert power to in generator mode using the BEMF coefficient, and applying the first electrical parameter to the electric machine or converting the received power to the second electrical parameter. 1. A method for controlling a specific electric machine , the method comprising:receiving with a controller a back electromotive force (BEMF) coefficient for the specific electric machine being controlled, the controller being configured to control operation of an inverter coupled to the electric machine, the inverter being configured to provide multi-phase electricity to the electric machine in motor mode or to receive multi-phase electricity from the electric machine in generator mode;receiving with the controller an input related to a selected torque to be applied by the electric machine in the motor mode or an input related to a selected power to be removed from the electric machine in the generator mode;determining a first voltage or current having a first characteristic the inverter is to apply to the electric machine in the motor mode using the BEMF coefficient in order to achieve the selected torque or determining a second voltage or current having a second characteristic the inverter is to convert power to using ...

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Номер записи: 97
08-05-2014 дата публикации

METHOD AND DEVICE FOR OPERATING AN ELECTRICAL MACHINE HAVING SEPARATE EXCITATION

Номер: US20140125268A1
Автор: Beyer Mario, Challand Yves, Goetting Gunther, Herranz Gracia Mercedes, Kolmorgen Stefan, Mikulec Dragan, Raichle Daniel, Scheidle Alexander, Spannhake Stefan
Принадлежит:

A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor temperature and/or a stator temperature are/is determined, and an excitation current and stator currents for the electrical machine are specified by a control unit as a function of the variable characterizing the rotor temperature and/or the stator temperature, at least in specifiable operating ranges. 110-. (canceled)11. A method for operating an electrical machine having separate excitation , the method comprising:determining a variable that characterizes at least one of a rotor temperature) and a stator temperature; andspecifying an excitation current and stator currents for the electrical machine at least in specifiable operating ranges, as a function of the variable characterizing the at least one of the rotor temperature and the stator temperature.12. The method of claim 11 , wherein at least three operating ranges are formed as a function of the variable characterizing the at least one of the rotor temperature and the stator temperature.13. The method of claim 12 , wherein in a first operating range claim 12 , in which the at least one of the rotor temperature and the stator temperature lie(s) below a specifiable first limit value claim 12 , the excitation current and the stator currents for a specified working point of the electrical machine claim 12 , which is defined by a torque and an engine speed claim 12 , are specified in efficiency-optimized manner independently of the at least one of the rotor temperature and the stator temperature.14. The method of claim 12 , wherein in a second operating range claim 12 , in which the at least one of the rotor temperature and the stator temperature lie(s) above the first limit value but below a predefinable second limit value claim 12 , the excitation current and the stator currents of the electrical machine are specified as a ...

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Номер записи: 98
16-02-2017 дата публикации

Power supply for multiphase motor providing recirculation compensation features and related methods

Номер: US20170047871A1
Автор: Giuseppe Maiocchi
Принадлежит: STMICROELECTRONICS SRL

A power supply may include power generation circuits, each configured to drive a respective winding of a multiphase motor; converter circuits, each configured to generate a digital driving signal for a respective power generation circuit, and a memory configured to store a plurality of fast recirculation compensation values corresponding to combinations of the digital driving signals that would otherwise result in a fast recirculation condition. The power supply may also include a controller coupled to the memory and configured to determine when a given combination of the digital driving signals would otherwise result in a fast recirculation condition, and based upon the determination, substitute at least one corresponding fast recirculation compensation value for the given combination of the digital driving signals.

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Номер записи: 99
15-02-2018 дата публикации

Single phase motor drive circuit and a method of driving a single phase motor

Номер: US20180048251A1
Автор: Dirk Leman, Petko Nedelev
Принадлежит: Melexis Bulgaria EOOD

A single phase motor drive circuit for driving a single phase motor, comprising: a timer unit for receiving a sensor signal indicative of an angular position of a rotor, and for providing a timing signal in phase with the sensor signal; a waveform generator for generating an waveform for energizing the motor, the waveform generator being adapted for receiving the timing signal and at least one configurable setting (Soff), and for generating the waveform based thereon; a configuration unit adapted for receiving a first input signal indicative of a desired motor speed and a second input signal (Vbat) indicative of the supply voltage, and for determining the configurable setting based on the input signals, and for providing the setting to the waveform generator to dynamically configure the waveform generator. A method of driving a single phase motor.

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Номер записи: 100