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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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 2915. Отображено 100.
15-03-2012 дата публикации

Brushless motor control device and brushless motor system

Номер: US20120062157A1
Автор: Hiroyuki Ota, Ippei Suzuki, Junichi Noda, Yuukou Nojiri
Принадлежит: Hitachi Car Engineering Co Ltd

Provided are a brushless motor control device and a brushless motor system capable of preventing impossibility of intended control of a brushless motor resulting from false recognition that the brushless motor is in operation in spite of stoppage of the brushless motor. A brushless motor control unit calculates a voltage instruction, representing voltages to be applied to the brushless motor, according to a control instruction supplied from an upper control device. A position error calculation unit calculates and estimates a position error between d-q-axes and dc-qc-axes as rotational coordinate axes by use of the voltage instruction outputted by the brushless motor control unit, current values acquired by a coordinate transformation unit and revolution speed for control of the brushless motor. A fault detection unit judges whether the brushless motor is faulty or not based on the position error calculated by the position error calculation unit.

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Номер записи: 1
21-06-2012 дата публикации

Systems, Methods, and Devices for Demodulating Induction Motor Instantaneous Rotor Slot Harmonic Frequency

Номер: US20120153935A1
Автор: Benoit Leprettre, Larry A. Turner, Roy S. Colby, Zhi Gao
Принадлежит: Schneider Electric USA Inc

A method and apparatus to dynamically and adaptively demodulate induction motor instantaneous rotor slot harmonic frequency for line-connected squirrel-cage polyphase induction motors. The instantaneous rotor slot harmonic frequency carries essential information on the instantaneous rotor speed. Based on a correlation between the motor's input power and its rotor slot harmonic frequency, a dynamically varying carrier frequency is computed and used in a rotor slot harmonic frequency detector. The rotor slot harmonic frequency detector is based on a superheterodyne principle. It contains a generalized linear-phase low-pass filter, whose bandwidth is estimated dynamically by a filter bandwidth estimator. The rotor slot harmonic frequency detector also includes a latency compensator, which receives the dynamically varying carrier frequency signal and synchronizes it with the output of a frequency demodulator.

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Номер записи: 2
19-07-2012 дата публикации

Method and Device for Monitoring and Correcting a Sensorless Rotor Position Detection in Permanently Excited Motors

Номер: US20120181962A1
Автор: Alexander Scheit, Horst-Günter Seelig
Принадлежит: GAERTNER ELECTRONIC DESIGN GmbH

The invention relates to methods and devices for monitoring and correcting a sensorless rotor position detection in permanently excited motors, comprising a control device and a current converter. The invention is especially characterised in that the ambiguity of the rotor position determined from the inductance ratios of the motor, in permanently excited motors, can be resolved in a simple manner without a sensor, and a defectively determined angle can be corrected as required. To this end, during the operation of the motor, the rotor position is detected by means of an inductance-based detection device. Furthermore, the rotor position is monitored in relation to the ambiguity of the inductance-based signals by means of a monitoring/correcting device, and where necessary, an occurring angle error corrected, the currents in the motor being modified.

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Номер записи: 3
25-10-2012 дата публикации

Control device for alternating current motor

Номер: US20120268046A1
Автор: Akira Yamazaki, Kozo Ide
Принадлежит: Yaskawa Electric Corp

A control device for an alternating current motor according to embodiments includes a current distributor and a phase estimator. The current distributor divides a torque command by using a control phase and outputs a component that contributes to a mechanical output of the motor as a δ-axis current command and a component that does not contribute to the mechanical output as a γ-axis current command. The phase estimator computes a phase at which a γ-axis component of an addition amount of the output of the current controller and a voltage drop amount of inductance of the motor becomes zero and outputs the computed phase as the control phase.

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Номер записи: 4
01-01-2015 дата публикации

ACTIVE MAGNETIC BEARINGS CONTROL SYSTEM

Номер: US20150002000A1
Автор: Benbouzid Salim, Da Silva Joaquim, Levine Jean, Turpault Stephane
Принадлежит:

A control device for controlling the position of a rotor supported by active magnetic bearings is provided. The control device includes a trajectory planning module for generating a requested position, speed and acceleration; a feedback unit for generating a position feedback value and a speed feedback value; a first correction circuit for generating a first command signal according to the difference between the requested position and speed and the position and speed feedback value respectively; a feed-forward controller for generating a second command signal; an adder for adding first and second command signals and delivering a third command signal for a non-linear inversion circuit connected to the adder for generating flux command signals for the electromagnets, and a second correction circuit for generating voltage command signals for the power amplifiers which control the current flowing in the electromagnet coils of the active magnetic bearings. 1. A control device for controlling the position of a rotor supported by active magnetic bearings supplied through power amplifiers whose outputs are connected to electromagnet coils of the active magnetic bearings , the control device comprising:a trajectory planning module for generating a requested position and a speed,{'sub': 1', '2, 'a feedback unit for generating a position feedback value and a speed feedback value from measurements of at least a position (Z(t)) of the rotor and current intensities (I(t), I(t)) in the electromagnet coils,'}{'sub': 'feedforward', 'a first correction circuit connected to the trajectory planning module and to the feedback unit for generating a first command signal ({umlaut over (Z)}(t)) according to the difference between the requested position and speed and the position and speed feedback value respectively,'}{'sub': 'feedforward', 'a feedforward controller connected to the trajectory planning module for generating a second command signal ({umlaut over (Z)}(t)) according to a ...

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Номер записи: 5
07-01-2016 дата публикации

PASSIVE ROTOR CONTROL MECHANISM FOR MICRO AIR VEHICLES

Номер: US20160001877A1
Автор: PAULOS James J.
Принадлежит:

Technology for achieving the behavior and benefits of traditional cyclic control in one rotor may be implemented with a simple under-actuated passive mechanism. An air vehicle employing the disclosed technology maintains lifting thrust by regulating the average rotor speed and generates control moments through coordinated pulsing of the motor torque. Rapid pulsing of the motor torque induces oscillations in propeller angle of attack, and so causes “cyclic control” without requiring the traditional auxiliary actuators and linkages. The MAV propulsion system is capable of using a minimum number of actuators in dual roles of thrust and moment objectives. 1. A system comprising:a motor;a processor communicatively connected with the motor; anda memory communicatively coupled with the processor, the memory having stored therein computer-readable instructions that, if executed by the processor, cause the processor to perform operations comprising:regulating an average speed of a rotor of an aerial vehicle to maintain lifting thrust; andpulsing of a torque of the motor of the aerial vehicle to generate control moments.2. The system of claim 1 , wherein the control moments are based on an estimate of a position of the rotor.3. The system of claim 2 , wherein the estimate of the position of the rotor is based on direct measurement using a high resolution magnetic encoder.4. The system of claim 2 , wherein the estimate of the position of the rotor is based on an output of an observer algorithm working on a measured motion of the aerial vehicle and commanded attitude corrections.5. The system of claim 2 , wherein the estimate of the position of the rotor is based on interpolating between once-per-revolution indexes from a device using timing.6. The system of claim 2 , wherein the estimate of the position of the rotor is based on interpolating between once-per-revolution indexes from a device using a known commutation speed of the motor of the aerial vehicle.7. The system of ...

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Номер записи: 6
07-01-2021 дата публикации

Servo motor controller

Номер: US20210003989A1
Автор: Satoshi Ikai, Takaki Shimoda, Yuuki SHIRAKAWA
Принадлежит: FANUC Corp

To provide a servo motor controller allowing to eliminate the risk of abnormal driving in a servo motor caused due to the inability to detect abnormality prior to establishment of absolute position. A device is configured to control a servo motor of an industrial machine. The device includes a position detection part configured to detect a position of the servo motor, a magnetic pole detection part configured to detect a magnetic pole position of the servo motor, and a pole position calculation part configured to, at least in initial calculation, obtain the magnetic pole position detected by the magnetic pole detection part as an initial magnetic pole position, prior to establishment of absolute position, and in the following calculation, incrementally obtain the magnetic pole position on the basis of data of the position detected by the position detection part and a magnetic pole interval of the motor.

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Номер записи: 7
02-01-2020 дата публикации

METHOD AND DEVICE FOR MAINTAINING A DETECTED ABSOLUTE POSITION OF AN ELECTRIC MOTOR OPERATING AS AN ACTUATOR DURING A CRITICAL OPERATION

Номер: US20200007068A1
Автор: Dietrich Markus
Принадлежит:

A method for maintaining a detected absolute position of an electric motor operating as an actuator during a critical operation involves the electric motor () being controlled by a controller () which is supplied with energy from an energy source. In the method, with which an absolute value sensor can be omitted, the absolute position of the electric motor () is measured during the operation thereof, wherein rotations of the electric motor () are detected. The rotations are counted, and a count value is output to a microprocessor () of the controller () in order to actuate the electric motor (), and in the event of a critical operation, the currently detected count value is maintained by means of an independent voltage supply (). 110-. (canceled)11. A method for maintaining a detected absolute position of an electric motor operating as an actuator during a critical operation , the method comprising:controlling the electric motor by a controller which is supplied with energy from an energy source;measuring an absolute position of the electric motor during the operation of the electric motor by detecting and counting rotations of the electric motor;outputting a counter value of the counted rotations of the electric motor to a microprocessor of the controller for controlling the electric motor; andmaintaining, in the event of a critical operation, a currently detected value of the counter value by an independent voltage supply.12. The method as claimed in claim 11 , further comprising:comparing a value of the independent voltage supply with a voltage threshold value; andre-referencing the absolute position of the electric motor if the voltage threshold value is understepped.13. The method as claimed in wherein the voltage threshold value is selected as higher than a voltage which is required in order to operate a sensor detecting the rotations of the electric motor.14. The method as claimed in claim 11 , further comprising:comparing the independent voltage supply with ...

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Номер записи: 8
12-01-2017 дата публикации

DRIVE APPARATUS

Номер: US20170012566A1
Автор: BESSHO Nobuyasu, FUKADA Ryuuta, KATSURA Shintaro, MATSUOKA Koji, NAGASE Koji
Принадлежит: AISIN SEIKI KABUSHIKI KAISHA

A drive apparatus includes: an electric motor; a drive target; a transmission mechanism through which the electric motor and the drive target are connected to each other; a rotation sensor that detects the rotational position of the electric motor; a starting position setting unit that sets the rotational position which is detected in a motor lock state in which the rotation of the electric motor is limited, as a starting position corresponding to a mechanical lock state of the drive target; a voltage sensor that detects the voltage of an electric power source which supplies electric power to the electric motor; and a starting position correcting unit that corrects the set starting position by the amount of correction which increases by the extent of an increase in the detected voltage. 1. A drive apparatus comprising:an electric motor;a drive target;a transmission mechanism through which the electric motor and the drive target are connected to each other;a rotation sensor that detects the rotational position of the electric motor;a starting position setting unit that sets the rotational position which is detected in a motor lock state in which the rotation of the electric motor is limited, as a starting position corresponding to a mechanical lock state of the drive target;a voltage sensor that detects the voltage of an electric power source which supplies electric power to the electric motor; anda starting position correcting unit that corrects the set starting position by the amount of correction which increases by the extent of an increase in the detected voltage.2. The drive apparatus according to claim 1 , further comprising;a temperature sensor that detects the temperature of the electric motor,wherein the starting position correcting unit further corrects the set starting position by the amount of correction which increases by the extent of a decrease in the detected temperature. This application is based on and claims priority under 35 U.S.C. §119 to ...

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Номер записи: 9
11-01-2018 дата публикации

MOTOR CONTROL DEVICE AND GAME MACHINE

Номер: US20180013362A1
Автор: IBUKI Hiroyuki, Ishii Akihiro
Принадлежит: Omron Corporation

A motor control device includes: a communication interface receiving from an external device a control command for defining a target rotation amount and a target rotation speed of the motor; a sensor interface connected with a first rotation angle sensor outputting a first detection signal in every rotation of the motor at a first angle or a second rotation angle sensor outputting a second detection signal in every rotation of the motor at a second angle larger than the first angle; a controller obtaining a measured value of a rotation speed of the motor based on a reception interval of the first or second detection signal, to decide a set value of the rotation speed to bring the measured value close to the target rotation speed; and a drive signal generator generating a drive signal for rotating the motor according to the set value, and outputting the drive signal. 1. A motor control device for controlling a motor , the device comprising:a communication interface configured to receive from an external device a control command for defining a target rotation amount and a target rotation speed of the motor;a sensor interface configured to be connected with any of a first rotation angle sensor for outputting a first detection signal in every rotation of the motor at a first angle and a second rotation angle sensor for outputting a second detection signal in every rotation of the motor at a second angle that is larger than the first angle;a controller configured to obtain a measured value of a rotation speed of the motor based on a reception interval of first detection signals or a reception interval of second detection signals, and configured to decide a set value of the rotation speed of the motor so as to bring the measured value close to the target rotation speed; anda drive signal generator configured to generate a drive signal for rotating the motor in accordance with the set value of the rotation speed, and configured to output the drive signal.2. The motor ...

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Номер записи: 10
11-01-2018 дата публикации

Method and apparatus for synchronizing mdps motor and motor position sensor

Номер: US20180013370A1
Автор: Jae Hyun Lee
Принадлежит: Hyundai Mobis Co Ltd

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

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Номер записи: 11
25-01-2018 дата публикации

ROTATION ANGLE ESTIMATION APPARATUS FOR ROTATING ELECTRIC MACHINE

Номер: US20180026559A1
Автор: Fujii Kiyoshi, HIRUMA Atsuyuki
Принадлежит: Denso Corporation

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

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Номер записи: 12
25-01-2018 дата публикации

MACHINE TOOL AND DETECTION METHOD

Номер: US20180026565A1
Автор: FUJIKI Masahiro, FUKUZONO Seiichi, NAKAMINAMI Masamitsu
Принадлежит: DMG MORI CO., LTD.

A machine tool is provided capable of detecting an abnormality caused by detaching a spindle. The machine tool includes: the spindle configured to rotate a workpiece or a tool; a sensor configured to output a signal according to a rotation angle of the spindle; and a controller configured to detect occurrence of an abnormality in at least one of the spindle and the sensor when an electrical signal different from the signal output during each of rotation of the spindle and halt of the spindle is output from the sensor. 1. A machine tool comprising:a spindle configured to rotate a workpiece or a tool;a sensor configured to output a signal according to a rotation angle of the spindle; anda controller configured to detect occurrence of an abnormality in at least one of the spindle and the sensor when a signal different from the signal output during each of rotation of the spindle and halt of the spindle is output from the sensor.2. The machine tool according to claim 1 , wherein the sensor is a magnetic encoder.3. The machine tool according to claim 1 , whereinduring each of the rotation of the spindle and the halt of the spindle, the sensor outputs two signals, each signal having phases shifted from each other by a predetermined angle, andthe controller detects the occurrence of the abnormality when a phase difference between the two signals is not the predetermined angle.4. The machine tool according to claim 1 , further comprising an output device configured to output a warning to indicate the occurrence of the abnormality when the abnormality is detected by the controller.5. The machine tool according to claim 1 , wherein a timing at which the warning is output includes a timing at which a primary power supply of the machine tool is turned on. The machine tool according to claim 1 , wherein the controller stops the warning when a predetermined input is received.7. The machine tool according to claim 1 , further comprising:a primary power supply configured to supply ...

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Номер записи: 13
23-01-2020 дата публикации

MOTOR DRIVE CONTROL DEVICE, MOTOR, AND BLOWER APPARATUS

Номер: US20200028456A1
Автор: HARA Yasoya, Morioka Hiroki
Принадлежит:

A motor drive control device that controls driving of a motor unit to which a three-phase AC voltage is inputted switches an energization pattern to a phase winding of the motor unit in a predetermined order, and detects a current value flowing through the motor unit for each energization pattern and stores the current value. In start-up operation of the motor unit, the motor drive control device starts synchronized operation when a second current value detected at the energization in the energization pattern of a second or subsequent time is smaller than a first current value detected at the energization in the energization pattern of a first time for m (m is a positive integer of two or more) consecutive times. In the synchronized operation, the energization pattern is switched according to rotational position information of a rotor generated based on a detection result of a voltage of the phase winding. 1. A motor drive control device comprising:a drive control unit that controls driving of a motor unit to which a three-phase alternating current voltage is inputted and that switches an energization pattern to phase windings of the motor unit in a predetermined order;a current detection unit that detects a current value flowing through the motor unit;a storage unit that stores the current value detected by the current detection unit for each energization in the energization pattern;a voltage detection unit that detects a voltage of each of the phase windings; anda position information generation unit that generates rotational position information of a rotor of the motor unit in a rotational direction based on a detection result of the voltage detection unit,wherein in start-up operation of the motor unit, the drive control unit starts synchronized operation for switching the energization pattern according to the rotational position information when a second current value detected by the current detection unit at energization of a second or subsequent time in the ...

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Номер записи: 14
31-01-2019 дата публикации

Method for reliable control of high rotor pole switched reluctance machine

Номер: US20190036472A1
Автор: Mahesh Krishnamurthy, Trevor Creary
Принадлежит: Software Motor Co

A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; and estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.

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Номер записи: 15
30-01-2020 дата публикации

APPARATUS FOR CONTROLLING COMPRESSOR, CONTROL SYSTEM FOR COMPRESSOR, AND METHOD FOR CONTROLLING COMPRESSOR

Номер: US20200036313A1
Автор: KIM Taekyoung, NAM Sanghoon, YIM Namsik
Принадлежит:

The present disclosure relates to an apparatus for controlling a compressor, a control system for a compressor, and a method for controlling a compressor, whereby a rotor is aligned by exciting each phase of a stator according to a preset reference order to thereby control operation of the motor, when operation of a motor of a compressor starts. 1. An apparatus for controlling a compressor that includes a motor including a stator and a rotor configured to rotate relative to the stator , the apparatus comprising:an inverter unit that is configured to convert an input power supplied from an external power source through an input unit to a driving power for driving the motor, the inverter unit being configured to output the driving power to the motor; anda controller that is configured to control an operation of the motor by controlling a switching operation of the inverter unit,wherein the controller is configured to, before starting of the operation of the motor, align a position of the rotor to a position of the stator by applying an excitation power to the stator according to a preset application criterion.2. The apparatus of claim 1 , wherein the stator comprises a plurality of slots corresponding to a plurality of positions of the rotor claim 1 , andwherein the preset application criterion comprises a preset sequence for applying the excitation power to one or more of the plurality of slots of the stator.3. The apparatus of claim 2 , wherein the controller is configured to apply the excitation power claim 2 , according to the preset sequence claim 2 , to (i) one or more slots of the stator corresponding to a b-phase claim 2 , (ii) one or more slots of the stator corresponding to a c-phase claim 2 , and (iii) one or more slots of the stator corresponding to an a-phase.4. The apparatus of claim 1 , wherein the controller is configured to align an N-pole of the rotor to a predetermined position by applying the excitation power according to the preset application ...

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Номер записи: 16
07-02-2019 дата публикации

Motor Drive Control Device, Electric Power Steering Device, and Vehicle

Номер: US20190039645A1
Автор: Kuwahara Masaki, UEMATSU Shigeyuki
Принадлежит:

To provide a motor drive control device, an electric power steering device, and a vehicle which can individually diagnose abnormalities of magnetic detection elements, designed in a multisystem configuration to include at least two systems, for each system. A motor drive control device includes two systems of first and second rotation information detection function units. The first and second rotation information detection function units include first and second rotation position information detection units and first and second rotation information detection units. The first and second rotation information detection units individually diagnose their own abnormalities based on first and second motor rotation position signals detected by the first and second rotation position information detection units. 110.-. (canceled)11. A motor drive control device comprising:an annular or disk-shaped magnet placed on a motor rotating shaft of an electric motor to be rotatable in synchronism with the motor rotating shaft and includes at least two different magnetic poles arranged alternately in a circumferential direction;at least two systems of rotation information detection function units each including a rotation position information detection unit configured to detect a magnetic flux of the magnet which changes depending on a rotation position of the motor rotating shaft as rotation position information, a motor rotation angle calculation unit configured to calculate a motor rotation angle based on the rotation position information detected by the rotation position information detection unit, a rotation position information diagnosis unit configured to diagnose an abnormality of the rotation position information detected by the rotation position information detection unit, and a rotation change amount measurement unit configured to measure an amount of change in the rotation position of the electric motor; anda motor drive control unit configured to control driving of the ...

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Номер записи: 17
24-02-2022 дата публикации

MANUFACTURING-SENSITIVE CONTROL OF HIGH ROTOR POLE SWITCHED RELUCTANCE MOTORS

Номер: US20220060132A1
Автор: CREARY Trevor, KNODEL TIM, KRISHNAMURTHY Mahesh
Принадлежит:

A method for controlling switched reluctance machine (SRM) utilizing a SRM control system. The method allows for adaptive pulse positioning over a wide range of speeds and loads. An initial rotor position is provided for the SRM utilizing an initialization mechanism. A pinned point on a phase current waveform is defined during an initial current rise phase of the current waveform. A slope of the current rise is determined as the current waveform reaches the pinned point. The slope is then fed to the commutation module of the SRM control system. An error signal from calculated inductance or current slope is used as an input to a control loop in the SRM control system. The time determining module determines an optimum time signal to fire a next pulse. The optimum time signal is fed to the SRM for turning the plurality of SRM switches to on and off states. 1. An SRM control system for controlling an SRM , the system comprising:an initialization module to provide an initial rotor position for the SRM utilizing an initialization mechanism;{'sub': 'on', 'a point defining module to define a pinned point on a phase current waveform of a pulse during an initial current rise phase of the current waveform, the current waveform starting to rise in correspondence of an inductance rise (Θ) of a phase of the SRM, wherein the pinned point is defined at a point corresponding to a magnitude between 50% and 100% of the steady state current on the initial current rise;'}a slope determining module to determine a slope of the current rise as the current waveform reaches the pinned point;a commutation module to receive the slope of the current rise from the slope determining module and a frequency input signal;an error calculating module to calculate an error signal of the pulse based on the slope of the current rise for feeding to a control loop in the SRM control system; anda time determining module to determine an optimum time to fire a next pulse using the error signal;whereby the SRM ...

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Номер записи: 18
07-02-2019 дата публикации

MAGNETIC POLE POSITION DETECTING DEVICE FOR SYCNRONOUS MOTOR AND MAGNETIC POLE POSITION DETECTING METHOD FOR SYCNRONOUS MOTOR

Номер: US20190044462A1
Автор: SONODA Naoto, Yamamoto Kenta
Принадлежит: FANUC Corporation

A magnetic pole position detecting device for a synchronous motor includes: a storage unit for storing a reference magnetic pole position of the synchronous motor as a predetermined reference; a magnetic pole position detector for detecting the magnetic pole position of the synchronous motor when a predetermined condition is satisfied; and a determination unit for comparing the reference magnetic pole position stored in the storage unit with the magnetic pole position detected by the magnetic pole position detector to determine that detection of the magnetic pole position is abnormal when the difference between the two falls out of a predetermined range. 1. A magnetic pole position detecting device for a synchronous motor , comprising:a storage unit configured to store a reference magnetic pole position of the synchronous motor as a predetermined reference;a magnetic pole position detector configured to detect the magnetic pole position of the synchronous motor when a predetermined condition is satisfied; anda determination unit configured to compare the reference magnetic pole position stored in the storage unit with the magnetic pole position detected by the magnetic pole position detector and determine that detection of the magnetic pole position is abnormal when a difference between the reference magnetic pole position and the detected magnetic pole position falls out of a predetermined range.2. The magnetic pole position detecting device for a synchronous motor according to claim 1 , wherein the magnetic pole position detector is configured to determine that the predetermined condition is satisfied when a controller for controlling the drive of the synchronous motor is energized.3. The magnetic pole position detecting device for a synchronous motor according to claim 1 , wherein the magnetic pole position detector is configured to determine that the predetermined condition is satisfied when an operator's instruction to start abnormality determination is given.4 ...

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Номер записи: 19
07-02-2019 дата публикации

MOTOR CONTROL DEVICE AND CONTROL METHOD

Номер: US20190044467A1
Автор: MORIMOTO Shinya, SHIMAMOTO Keita
Принадлежит: KABUSHIKI KAISHA YASKAWA DENKI

A control device includes an estimation module configured to repeatedly calculate an angle estimation value correlated with a magnetic pole position of a rotating electric machine, and a storage module configured to store the angle estimation value. The estimation module includes a response information calculation module configured to calculate response information indicating a current change resulting from a change in an output voltage to the rotating electric machine or a voltage change resulting from a change in an output current to the rotating electric machine, a coefficient calculation module configured to calculate an interference coefficient correlated with electromagnetic mutual interference between coordinate axes of an orthogonal coordinate system of the rotating electric machine based on a past angle estimation value stored in the storage module, and an angle calculation module configured to calculate an angle estimation value based on the response information and the interference coefficient. 1. A control device comprising:a power converter configured to convert electric power of a power supply into electric power for driving an electric motor, anda controller configured to repeatedly calculate an angle estimation value correlated with a magnetic pole position of the electric motor and to store the angle estimation value, calculate response information indicating a change in a first electrical property associated with the electric motor selected from a group consisting of an output voltage and an output current, wherein the change in the first electrical property results from a change in a second electrical property selected from the group, and', 'calculate the angle estimation value based on the response information and a past angle estimation value which is stored by the controller to compensate for an angle estimation error resulting from an electromagnetic mutual interference between coordinate axes associated with an orthogonal coordinate of the ...

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Номер записи: 20
06-02-2020 дата публикации

ROTOR SYNCHRONIZATION OF CROSS-COMPOUND SYSTEMS ON TURNING GEAR

Номер: US20200044456A1
Автор: Walters Lawrence Dean
Принадлежит:

A method of synchronizing a cross-compound generator system on one or more turning gears during startup includes determining, via a notch monitor controller, first and second angular velocities, respectively, of a first and a second rotor. The method also includes simultaneously exciting, via the notch monitor controller, the first and second rotors to attain electromechanical coupling therebetween. The method further includes determining, via the notch monitor controller, a value of a time at which a calibration value of an offset is a constant value, where the offset is representative of a phase alignment of the first rotor relative to the second rotor, and where the offset is indicative of a successful electromechanical coupling therebetween. The method also includes disengaging the one or more turning gears from the cross-compound generator system. 1. A method of synchronizing a cross-compound generator system on one or more turning gears during startup , said method comprising: a value of a first angular velocity of a first rotor of the cross-compound generator system; and', 'a value of a second angular velocity of a second rotor of the cross-compound generator system;, 'determining, via a notch monitor controller coupled to the cross-compound generator systemsimultaneously exciting, via the notch monitor controller, the first and second rotors to attain electromechanical coupling therebetween;determining, via the notch monitor controller, a value of a time at which a calibration value of an offset is a constant value, wherein the offset is representative of a phase alignment of the first rotor relative to the second rotor, and wherein the offset is indicative of a successful electromechanical coupling therebetween; anddisengaging the one or more turning gears from the cross-compound generator system.2. A method in accordance with claim 1 , wherein: sensing, via a first sensor, a plurality of rotations of the first rotor, wherein a value of a first passage of ...

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Номер записи: 21
06-02-2020 дата публикации

ADAPTIVE HOLD CURRENT FOR ELECTRIC MOTORS

Номер: US20200044587A1
Автор: Hartzsch Jörg
Принадлежит:

In a method for generating a blocking moment in a standstill state of an electrically commutated electric motor having at least two windings, on which electric motor a possibly varying load moment acts from outside in the standstill state, first, a blocking current is supplied at a maximum value into a first winding. This blocking current is successively reduced to, possibly, a minimum value. From that moment the inductivity of the electric motor is controlled, namely by controlling the blocking current if the control deviation between the actual value and the set value of the inductivity exceeds a predetermined threshold value. Thereby, it is possible to control the blocking current in an adaptive manner insofar as, despite a varying load moment, the standstill state of the electric motor can be maintained by varying the blocking current. 112.-. (canceled)13. A method for generating a blocking moment in a standstill state of an electrically commutated electric motor having at least two windings , wherein , on the electric motor a varying load moment acts from outside in the standstill state , wherein , in the method ,a) a blocking current with a predetermined maximum value is supplied into a winding terminal of a first winding,b) a motor inductivity parameter is determined which represents an inductivity of the electric motor when the blocking current with the predetermined maximum value is supplied thereto in the standstill state, and a value of the motor inductivity parameter when the blocking current with the predetermined maximum value is supplied thereto forms an initial value,c) it is attempted, by successively reducing the blocking current, to achieve a deviation of the value of the motor inductivity parameter from the initial value by more than a predetermined control deviation,d) in case the deviation of the value of the motor inductivity parameter from the initial value by more than the predetermined control deviation does not occur, the reduction of the ...

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Номер записи: 22
06-02-2020 дата публикации

MOTOR CONTROL DEVICE AND CURRENT RIPPLE DETECTION METHOD FOR DC MOTOR

Номер: US20200044588A1
Автор: YANAGITA Yuichi
Принадлежит:

A ripple detection device includes: a current detection part that outputs a variation in an armature current as a voltage variation signal; a first smoothing circuit block that extracts a current ripple component and a noise component from the voltage variation signal and outputs a first smoothing signal S; a gain adjustment part that adjusts the amplitude of the first smoothing signal S and outputs an adjustment signal VCA; a second smoothing circuit block that corrects distortion of the adjustment signal VCA and outputs a second smoothing signal S; a ripple detection part that extracts only the current ripple component from the second smoothing signal S by removing the noise component therefrom and outputs a ripple component signal S; and a digital signal conversion part that converts the ripple component signal S into a digital signal. 1. A motor control device comprising a ripple detection device that detects a current ripple contained in an armature current of a DC motor and outputs the current ripple as a rectangular wave signal , whereinthe ripple detection device includes:a current detection part that detects the armature current and outputs a variation in the armature current as a voltage variation signal;{'b': '1', 'a first smoothing part that extracts a current ripple component and a noise component from the voltage variation signal and outputs a first smoothing signal S composed of the current ripple component and noise component;'}{'b': 1', '0, 'a ripple detection part that extracts only the current ripple component from the first smoothing signal S by removing the noise component therefrom and outputs a ripple component signal S; and'}{'b': '0', 'a digital signal conversion part that converts the ripple component signal S into a digital signal.'}2. A motor control device comprising a ripple detection device that detects a current ripple contained in an armature current of a DC motor and outputs the current ripple as a rectangular wave signal , ...

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Номер записи: 23
14-02-2019 дата публикации

METHOD FOR IDENTIFYING AN ERROR STATE IN A BRUSHLESS DIRECT CURRENT MOTOR

Номер: US20190052200A1
Автор: Gunselmann Christian, Sader Frank
Принадлежит: Continental Automotive GmbH

A method for identifying an error state in a brushless direct current motor. For the purposes of this identification, an angle deviation between a shaft angle and a control angle is calculated and used to identify error states on the basis of characteristic patterns. This also works, in particular, for slowly-rotating or stationary brushless direct current motors and allows a clear reduction in the calculation capacities required, compared to the prior art. 1. A method for identifying an error state in a brushless direct current motor having a shaft , the method comprising:recording a shaft angle assigned to the shaft,recording a drive angle which indicates a respectively assigned angle value for each of a number of measured sectors of a drive circuit of the direct current motor,calculating an angle difference by subtracting the drive angle from the shaft angle,calculating an angle deviation from the angle difference using a reference value,applying a number of predefined specifications to the angle deviation as a function of the shaft angle or time, wherein an error state is assigned to each specification, andascertaining an error state if a specification to which the error state is assigned indicates the error state upon the application.2. The method as claimed in claim 1 ,wherein the angle deviation is calculated from the angle difference as follows: {'br': None, 'Angle deviation=angle difference,'}, 'if the angle difference is negative {'br': None, 'Angle deviation=0°,'}, 'if the angle difference is not negative but is less than or equal to the reference value {'br': None, 'Angle deviation=angle difference−reference value.'}, 'if the angle difference is greater than the reference value3. The method as claimed in claim 1 ,wherein a specification is an algorithm or a comparison with a predefined pattern.4. The method as claimed in any claim 1 ,wherein the process of respectively applying a specification extends at least over a range of the drive angle of one, two, ...

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Номер записи: 24
14-02-2019 дата публикации

DETECTION DEVICE AND DETECTION METHOD FOR DETECTING NUMBER OF REVOLUTIONS OF SENSORLESS EPB MOTOR

Номер: US20190052202A1
Автор: AHN Dae Ki, KANG Shin Deok, KIM Eung Soo, NOH Seung Soo, SONG Soo Hwan
Принадлежит:

A device and method for detecting the number of revolutions of a sensorless electric park brake (EPB) motor. The device for detecting the number of revolutions of a sensorless motor includes: an actuator driving motor used to set and release a parking brake of an EPB system; an electronic control module for controlling the motor, a vehicle battery for supplying power to the motor and the electronic control module; and a main processing unit for receiving an output signal of the electronic control module and estimating the number of revolutions of the motor, wherein the electronic control module further includes a ripple measuring unit for receiving an output signal of the motor and measuring a ripple of the motor. 1. A device for detecting a number of revolutions of a sensorless motor for an electronic parking brake (EPB) the device comprising:an actuator driving motor used to set and release a parking brake of an EPB system;an electronic control module for controlling the motor,a vehicle battery for supplying power to the motor and the electronic control module; anda main processing unit for receiving an output signal of the electronic control module and estimating the number of revolutions of the motor,wherein the electronic control module further comprises a ripple measuring unit for receiving an output signal of the motor and measuring a ripple of the motor.2. The device according to claim 1 , wherein the output signal of the motor corresponds to either a current or a voltage.3. The device according to claim 2 , wherein the output signal of the motor is output as a value adjusted using a signal amplifier or a signal attenuator.4. The device according to claim 2 , wherein the ripple measuring unit further includes:a ripple signal selector for selecting only a ripple signal from the output signal of the motor,a first level translator for receiving a ripple signal selected by the ripple signal selector and a direct current signal of the battery and translating an ...

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Номер записи: 25
22-02-2018 дата публикации

METHOD AND SYSTEM FOR SENSORLESS CONTROL OF A PMSM MOTOR

Номер: US20180054148A1
Автор: Zhao Chen
Принадлежит:

A method and system for adaptive sensorless determination of the position of a PMSM motor is described. The system and method include: determining the rotor position and the rotor polarity by means of discrete signal injection for the range between standstill up to low rotational speed; determining the rotor position by means of continuous signal injection at a rotational speed that is lower than a first changeover speed; determining the rotor position by means of back EMF at a rotational speed that is higher than the first changeover speed; wherein by means of a motor control system, depending on the rotational speed, a switch is made between rotor position determination by continuous signal injection and rotor position determination by back EMF; and wherein during movement of the rotor, the rotor polarity and/or the rotor position are/is monitored and optionally adjusted at a point in time using the rotor polarity and/or the rotor position at a previous point in time. 1. A method for adaptive sensorless determination of position of a permanent magnet synchronous machine (PMSM) motor , the method comprising:determining rotor position and rotor polarity by discrete signal injection for a range between standstill up to a predetermined rotational speed; determining the rotor position using one of continuous signal injection at a rotational speed that is lower than a first changeover speed or back electromotive force (EMF) at a rotational speed that is higher than the first changeover speed; and', 'thereafter determining the rotor position using another of the continuous signal injection at the rotational speed that is lower than the first changeover speed or the back EMF at the rotational speed that is higher than the first changeover speed., 'switching, using a motor control unit and based on rotational speed, between2. The method of claim 1 , wherein the rotor position is determined by the continuous signal injection at the rotational speed that is lower than the ...

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Номер записи: 26
25-02-2021 дата публикации

Method and apparatus for detecting rotor magnetic pole position in a single-phase bldc motor

Номер: US20210058016A1
Автор: Hansu JUNG, Jae Jun You, Jaemin Kim
Принадлежит: LG ELECTRONICS INC

A method and an apparatus may detect a rotor magnetic pole of a single-phase BLDC motor. The method and apparatus may quickly and precisely initially drive the single-phase BLDC motor by detecting a position of a magnetic pole of a rotor adjacent to a stator by applying a high frequency voltage to the single-phase BLDC motor and analyzing a magnitude of a flowing current.

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Номер записи: 27
25-02-2021 дата публикации

SYNCHRONOUS ROTATING MACHINE CONTROL DEVICE AND MACHINE LEARNING DEVICE

Номер: US20210058017A1
Автор: HACHIYA Yosuke
Принадлежит: Mitsubishi Electric Corporation

A machine learning device includes: a state observer that observes, as a state variable, at least one of driving noise of a synchronous rotating machine and an error with respect to a preset position of a rotational position of the synchronous rotating machine determined by driving voltage; and a learner that determines a value of a parameter on a basis of the state variable observed by the state observer. The learner includes: a reward calculator that calculates a reward on a basis of the state variable; and a function updater that determines the value of the parameter on a basis of the reward that has been calculated. The reward calculator increases the reward when the driving noise is smaller than a target value of driving noise. 16-. (canceled)7. A machine learning device that determines a value of a parameter used for outputting a command value relating to a high-frequency voltage for estimating a position of the synchronous rotating machine , the high-frequency voltage having a frequency higher than a frequency of a driving voltage used when a synchronous rotating machine is driven , the device comprising:a state observer to observe, as a state variable, at least one of driving noise of the synchronous rotating machine and an error with respect to a preset position of a rotational position of the synchronous rotating machine determined by the driving voltage; anda learner to determine a value of the parameter on a basis of the state variable observed by the state observer, wherein a reward calculator to calculate a reward on a basis of the state variable; and', 'a function updater to determine the value of the parameter on a basis of the reward that has been calculated, and, 'the learner includesthe reward calculator increases the reward when the driving noise is smaller than a target value of driving noise.89-. (canceled)10. A synchronous rotating machine control device comprising:a controller to generate a first command value relating to a driving voltage ...

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Номер записи: 28
13-02-2020 дата публикации

Synchronous Motor Control Apparatus

Номер: US20200052620A1
Автор: HADINATA Agnes, Iwaji Yoshitaka, OHYA Masato, Onuma Yusaku, SUGIMOTO Takuya, Tobari Kazuaki
Принадлежит:

According to the present invention, in position sensorless control for switching between a 120-degree energization scheme for a low-speed region and a 180-degree energization scheme for a mid-to-high-speed region, stable and highly accurate speed control characteristics are provided by suppressing speed deviation Δωr in the low-speed region, and by preventing current jump-up caused by a discontinuous rotational speed occurring during switching to the mid-to-high-speed region. In the case of driving in the 120-degree energization scheme, a voltage command value is corrected such that an estimated speed value or a detected speed value follows a speed command. 1. A synchronous motor control apparatus which drives a synchronous motor in a 120-degree energization scheme , according to a rotational speed command value , using a power converter that drives the synchronous motor , the synchronous motor control apparatus comprising:any one of means for detecting a position of a rotor of the synchronous motor directly or by estimation, whereinan internal command value of the control apparatus is corrected based on a deviation between a value of the detected position and a phase command value obtained by integrating the rotational speed command value.2. A synchronous motor control apparatus which drives a synchronous motor in a 120-degree energization scheme , according to a rotational speed command value , using a power converter that drives the synchronous motor , the synchronous motor control apparatus comprising:any one of means for detecting a position of a rotor of the synchronous motor directly or by estimation, whereinan internal command value of the control apparatus is corrected based on a deviation between a detected speed value obtained by differentiating a value of the detected position and the rotational speed command value.3. The synchronous motor control apparatus according to claim 1 , whereinthe internal command value of the control apparatus is a voltage ...

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Номер записи: 29
13-02-2020 дата публикации

CONTROL METHOD FOR DRIVING MOTOR ROTATION, ELECTRONIC GOVERNOR, POWER SYSTEM, AND UNMANNED AERIAL VEHICLE

Номер: US20200052623A1
Автор: LAN Qiu, LIU Wanqi, ZHOU Changxing
Принадлежит:

A method for controlling a motor includes obtaining addressing information of an electronic speed governor coupled to the motor, determining a rotation direction of the motor based on the addressing information, and providing a drive signal to the motor according to the rotation direction. 1. A method for controlling a motor comprising:obtaining addressing information of an electronic speed governor coupled to the motor;determining a rotation direction of the motor based on the addressing information; andproviding a drive signal to the motor according to the rotation direction.2. The method of claim 1 , wherein determining the rotation direction of the motor includes determining the rotation direction based on a preset correspondence between the addressing information and the rotation direction of the motor.3. The method of claim 1 , wherein determining the rotation direction of the motor includes determining the rotation direction based on a calculation according to the addressing information.4. The method of claim 1 , wherein obtaining the addressing information includes:obtaining an addressing signal sent by an external controller; anddetermining the addressing information according to the addressing signal.5. The method of claim 4 , wherein the addressing signal includes a Pulse Width Modulation (PWM) signal.6. The method of claim 1 , wherein obtaining the addressing information includes:obtaining voltage information of an analog input port; anddetermining the addressing information according to the voltage information.7. The method of claim 6 , wherein obtaining the voltage information of the analog input port includes detecting claim 6 , via the analog input port claim 6 , a voltage value across a resistor connected in series with a communication link between the controller and the external controller.8. The method of claim 1 , further comprising:storing information of the rotation direction of the motor.9. The method of claim 8 , further comprising:reading ...

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Номер записи: 30
05-03-2015 дата публикации

METHOD AND APPARATUS FOR MONITORING ROTATIONAL POSITION OF AN ELECTRIC MACHINE

Номер: US20150061563A1
Автор: Dunbar Leah, HITI SILVA, JANG Jihoon, Kowalewski Daniel L., Murrell Terry, SCHULZ STEVEN E., SON YO CHAN
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

A method for monitoring an electric motor employing a pulse-type rotational position sensor includes monitoring a signal output from the pulse-type rotational position sensor and a reference signal associated with a control signal for the electric motor. A position of a rotor of the electric motor coincident with the reference signal is determined based upon a nominal rotor position, a nominal rotational speed of the rotor and a time between the reference signal and a falling edge of the signal output from the pulse-type rotational position sensor. The electric motor is controlled based upon the position of the rotor. 1. A method for monitoring an electric motor employing a pulse-type rotational position sensor , comprising:monitoring a signal output from the pulse-type rotational position sensor and a reference signal associated with a control signal for the electric motor;determining a position of a rotor of the electric motor coincident with the reference signal based upon a nominal rotor position, a nominal rotational speed of the rotor and a time between the reference signal and a falling edge of the signal output from the pulse-type rotational position sensor; andcontrolling the electric motor based upon the position of the rotor.2. The method of claim 1 , wherein determining the position of the rotor coincident with the PWM reference signal comprises determining the position of the rotor in accordance with the following relationship:{'br': None, 'sub': Final', 'MT', 'MT, 'i': [k]=θ', '[k]+ω', '[k−', ×ΔT[k], 'θ1'} [{'sub': 'Final', 'θ[k] is the position of the rotor,'}, {'sub': 'MT', 'θ[k] is the nominal rotor position,'}, {'sub': 'MT', 'ω[k−1] is the nominal rotational speed of the rotor, and'}, 'ΔT[k] is the time between the reference signal to the falling edge of the signal output from the pulse-type rotational position sensor., 'wherein'}4. The method of claim 1 , wherein monitoring the reference signal associated with the control signal for the electric ...

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Номер записи: 31
21-02-2019 дата публикации

Actuator with Inherent Position Sensor

Номер: US20190058423A1
Автор: Knoedgen Horst, Schleifer Horst
Принадлежит:

An actuation system is proposed for an optical system, comprising a voice coil motor for actuating the optical system, the voice coil motor comprising a magnet and an electric coil, a position measuring unit for measuring the position of the electric coil and providing a position feedback signal, and a control unit for closed loop control of the position of the optical system based on a target position and the position feedback signal, used for generating a drive signal for the electric coil. According to the disclosure, a ferromagnetic element is arranged in proximity to the electric coil so that the inductance of the electric coil depends on its position. Further, the position-measuring unit measures the inductance of the electric coil and determines the position of the electric coil based on the determined inductance. 1. An actuation system for an optical system , comprising:a voice coil motor for actuating the optical system, the voice coil motor comprising at least one magnet and an electric coil;a position-measuring unit for measuring a position of the electric coil and providing a position feedback signal; anda control unit for closed loop control of a position of the optical system based on a target position and the position feedback signal, and for generating a drive signal for the electric coil,wherein a ferromagnetic element is arranged in proximity to the electric coil so that an inductance of the electric coil depends on its position, andthe position measuring unit measures the inductance of the electric coil and determines the position of the electric coil based on a determined inductance.2. The system of claim 1 , wherein the inductance of the electric coil varies based on a relative position between the electric coil and the ferromagnetic element.3. The system of wherein the inductance of the electric coil is determined based on a measured voltage and/or a measured current.4. The system of claim 1 , further comprising a summation unit for adding an ...

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Номер записи: 32
01-03-2018 дата публикации

ELECTRIC MOTOR PROTECTION USING STATOR CURRENT AND VOLTAGE MEASUREMENTS

Номер: US20180062552A1
Автор: Donolo Marcos A., Hartshorn Jay
Принадлежит: SCHWEITZER ENGINEERING LABORATORIES, INC.

Monitoring conditions of an electric motor using stator current and voltage signals from power supplied to the motor is disclosed herein. The stator voltage and current signals may be used to calculate instantaneous power values which may be used to calculate slip. The slip may be used to monitor for a locked rotor condition during startup of the motor. The slip value may be used to provide thermal protection to the electric motor. 1. A method for providing protection and monitoring to a three-phase electric motor using measurements from a stator of the electric motor , comprising:in an intelligent electronic device (“IED”), sampling a plurality of stator currents and voltages to a motor to obtain a plurality of current and voltage values for each of three phases;calculating a composite power from the plurality of current and voltage values;for a first predetermined frequency, calculate a first magnitude of the composite power using a first predetermined number of composite power samples;for a second predetermined frequency, calculate a second magnitude of the composite power using the first predetermined number of composite power samples;determine a maximum magnitude from the first magnitude and the second magnitude;calculate a slip value from the predetermined frequency corresponding with the determined maximum magnitude;determining operating conditions of the electric motor using the calculated slip value; andwhen the operating conditions are outside of predetermined acceptable operating conditions, providing a protection signal to open a circuit breaker to disconnect the electric motor.2. The method of further comprising:for a third predetermined frequency, calculate a third magnitude of the composite power using the first predetermined number of composite power samples; anddetermine the maximum magnitude from the first, second, and third magnitudes.3. The method of claim 1 , further comprising the step of filtering the calculated composite power to remove high- ...

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Номер записи: 33
04-03-2021 дата публикации

ELECTRIC MOTOR CONTROL DEVICE

Номер: US20210067069A1
Автор: Iezawa Masahiro, KIMPARA Yoshihiko, KITAGAWA Jun, MATSUURA Daiki, Ogawa Yasufumi
Принадлежит: Mitsubishi Electric Corporation

An electric motor control device such that a rotation angle correction value used in a phase correction of an angle sensor rotation angle signal can be calculated with high accuracy is obtained. The electric motor control device includes a rotation angle correction amount calculation unit () that, based on a rotation angle signal for an alternating current electric motor () output from an angle sensor () and a current detection signal for the alternating current electric motor () output from a current detection unit (), calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor (), wherein the rotation angle correction amount calculation unit (), based on a current detection signal when a short circuit is caused between winding terminals of the alternating current electric motor (), calculates at least either one rotation angle correction amount of a direct current component rotation angle correction amount and an alternating current component rotation angle correction amount. 1. An electric motor control device , comprising:an electric motor control circuit that controls an inverter that supplies power to an alternating current electric motor, and into which a rotation angle signal for the alternating current electric motor output from an angle sensor and a current detection signal for the alternating current electric motor output from a detector are input;a rotation angle correction amount calculator that, based on the rotation angle signal and the current detection signal, calculates a rotation angle correction amount to correct a rotation angle error between the rotation angle signal and a magnetic pole position of the alternating current electric motor; anda rotation angle corrector that stores the rotation angle correction amount calculated by the rotation angle correction amount calculator, reads the stored rotation angle correction ...

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Номер записи: 34
04-03-2021 дата публикации

INDUCTANCE-BASED ESTIMATION OF ROTOR MAGNET TEMPERATURE

Номер: US20210067075A1
Автор: Berry Daniel J., JUNG Hyun-Sam, Sul Seung Ki, Yoo Anno
Принадлежит:

A method for estimating a magnet temperature of a rotor magnet within a rotary electric machine includes, while a rotor of the electric machine is stationary, injecting a high-frequency voltage component onto a control voltage of the electric machine, via a controller, to generate an adjusted voltage command, and extracting a high-frequency component of a resulting current as an extracted high-frequency component. The method also includes calculating an inductance value of the electric machine using the extracted high-frequency component of the resulting current. The magnet temperature is estimated using the calculated inductance value and an angular position of the rotor. The method includes controlling an operation of the electric machine using the estimated magnet temperature. An electric powertrain uses the electric machine and controller noted above. 1. A method for estimating a magnet temperature of a rotor magnet within a rotary electric machine having a rotor that includes the rotor magnet , the method comprising: measuring an angular position of the rotor using a position sensor;', 'injecting a high-frequency voltage component onto a control voltage of the electric machine, via a controller, to thereby generate an adjusted voltage command;', 'extracting a high-frequency component of a resulting current as an extracted high-frequency component;', 'calculating an inductance value of the electric machine using the extracted high-frequency component of the resulting current; and', 'estimating a temperature of the rotor magnet using the calculated inductance value and the angular position to thereby generate an estimated magnet temperature; and, 'while the rotor is stationarywhen the rotor is no longer stationary, controlling an operation of the electric machine using the estimated magnet temperature.2. The method of claim 1 , wherein extracting the high-frequency component of the resulting current includes using a band pass filter.3. The method of claim 1 , ...

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Номер записи: 35
27-02-2020 дата публикации

MOTOR DRIVE CONTROL DEVICE, ELECTRIC POWER STEERING DEVICE, AND VEHICLE

Номер: US20200062300A1
Автор: Kuwahara Masaki, UEMATSU Shigeyuki
Принадлежит:

To provide a motor drive control device, an electric power steering device, and a vehicle which can individually diagnose abnormalities of magnetic detection elements, designed in a multisystem configuration to include at least two systems, for each system. A motor drive control device includes two systems of first and second rotation information detection function units. The first and second rotation information detection function units include first and second rotation position information detection units and first and second rotation information detection units. The first and second rotation information detection units individually diagnose their own abnormalities based on first and second motor rotation position signals detected by the first and second rotation position information detection units. 1. A motor drive control device comprising:an annular or disk-shaped magnet placed on a motor rotating shaft of an electric motor to be rotatable in synchronism with the motor rotating shaft and includes at least two different magnetic poles arranged alternately in a circumferential direction;at least two systems of rotation information detection function units each including a rotation position information detection unit configured to detect a magnetic flux of the magnet which changes depending on a rotation position of the motor rotating shaft as rotation position information, a motor rotation angle calculation unit configured to calculate a motor rotation angle based on the rotation position information detected by the rotation position information detection unit, a rotation position information diagnosis unit configured to diagnose an abnormality of the rotation position information detected by the rotation position information detection unit, and a rotation change amount measurement unit configured to measure an amount of change in the rotation position of the electric motor; anda motor drive control unit configured to control driving of the electric motor based ...

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Номер записи: 36
11-03-2021 дата публикации

STEER BY WIRE SYSTEM WITH REDUNDANT ANGULAR POSITION SENSING AND AN END-OF-TRAVEL STOP

Номер: US20210070361A1
Автор: "ONeill Edmund C.", Erickson Paul R., Johnson Benjamin D.
Принадлежит: SENSATA TECHNOLOGIES, INC.

A steer-by-wire system comprising a steering wheel for use by an operator and an electric motor assembly coupled to the steering wheel for providing active torque feedback. The electric motor has a rotor mounted for rotation, and a magnet mounted to the rotor for rotation about an axis, wherein the at least one magnet is a permanent magnet with a pole pair. A fixed stator has coils for creating an electric field to act upon the magnet. Electronics are positioned on the axis of the magnet for controlling commutation of the stator coils and generating a primary high resolution angular position signal indicative of movement of the steering wheel by the operator. High resolution on-axis sensors, in communication with the electronics, detect a commutation position between the rotor and the stator and producing first and second continuous angle measurements for the pole pair of the at least one magnet. 1. A brushless DC motor for providing active torque feedback in a steer by wire system comprising:a fixed stator;a rotor mounted for rotation with respect to the fixed stator, the rotor having a plurality of magnets, each magnet forming a pole pair;at least two analog magnetic sensors for providing a continuous angle measurement signal; anda steering control unit for receiving the continuous angle measurement signal and determining a relative positional measurement of the rotor based on the continuous angle measurement signal.2. A brushless DC motor as recited in claim 1 , wherein the steering control unit determines an absolute measurement of a position of the rotor upon start up and updates the position of the rotor based on the relative positional measurement.3. A brushless DC motor as recited in claim 2 , wherein the steering control unit utilizes a single magnet at an end of a shaft of the rotor for sensing the position.4. A brushless DC motor as recited in claim 1 , wherein the at least two analog magnetic sensors provide motor commutation data to the steering control ...

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Номер записи: 37
27-02-2020 дата публикации

GEAR MOTOR, ASSOCIATED WIPER SYSTEM AND ASSOCIATED CONTROL METHOD

Номер: US20200067432A1
Автор: Herrada Jose Luis
Принадлежит: VALEO SYSTEMES D'ESSUYAGE

The present invention relates to a gear motor (), in particular for a wiper system, comprising: —a brushless DC electric motor () including: —a rotor (); —a stator () having coils () for electromagnetically exciting the rotor (); —a device () for determining the angular position of the rotor () with respect to the stator (); —a control unit () configured to generate control signals for supplying power to the electromagnetic excitation coils () according to the angular position of the rotor () determined by the device () for determining the angular position of the rotor (); —a reduction gear mechanism () linked, on one side, to the rotor () of the electric motor () and, on the other side, to an output shaft () that is intended to be linked to an external mechanism, in particular a wiper system, the reduction gear mechanism () having a predefined reduction ratio, said device () for determining the angular position of the rotor () comprises at least one Hall effect sensor () associated with a control magnet () that rotates with the rotor () and the gear motor () also comprises a processing unit () connected to the device () for determining the angular position of the rotor () and configured to determine the angular position of the output shaft () on the basis of the angular position of the rotor () determined by taking the predefined reduction ratio of the reduction gear mechanism () into account. 1. A gear motor for a wiper system , comprising: a rotor,', 'a stator having coils for electromagnetically exciting the rotor,', 'a device for determining the angular position of the rotor relative to the stator,', 'a control unit configured to generate control signals for powering the electromagnetic excitation coils a function of the angular position of the rotor determined by the device for determining the angular position of the rotor,', 'a reduction gear mechanism linked to the rotor of the electric motor and to an output shaft configured to be linked to the wiper system ...

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Номер записи: 38
27-02-2020 дата публикации

SWITCHED RELUCTANCE MOTOR CONTROL SYSTEM

Номер: US20200067433A1
Автор: ABDUL Sajan, Gerdes Jesse, HAN Sam, Khalil Ahmed, Nino Baron Carlos, Thorne James, Wai Jackson
Принадлежит: CATERPILLAR INC.

A device may receive a current measurement of a motor identifying a plurality of component currents associated with a plurality of phases. The device may determine a position estimate for the motor based on the plurality of component currents associated with the plurality of phases. The device may control the motor based on the plurality of component currents. 1. A switched reluctance motor control system , comprising:a memory; and cause a current to be provided to a switched reluctance motor;', 'determine a plurality of component currents associated with a plurality of phases based on a result of causing the current to be provided to the switched reluctance motor;', 'determine that a first component current, of the plurality of component currents, is equal to a second component current of the plurality of component currents;', 'determine, based on whether a third component current, of the plurality of component currents, is greater than or less than the first component current and the second component current, an angular position estimate for the switched reluctance motor; and', 'control, based on the angular position estimate, the switched reluctance motor., 'one or more processors configured to2. The switched reluctance motor control system of claim 1 , wherein the one or more processors are configured to determine the angular position estimate without receiving information identifying a position measurement or a speed measurement.3. The switched reluctance motor control system of claim 1 , wherein the switched reluctance motor is included in a machine.4. The switched reluctance motor control system of claim 1 , wherein the one or more processors when causing the current to provided claim 1 , are configured to: 'wherein the current is associated with a priming voltage of the inverter.', 'cause an inverter of the switched reluctance motor to provide the current,'}5. The switched reluctance motor control system of claim 1 , wherein the angular position estimate is ...

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Номер записи: 39
15-03-2018 дата публикации

CAMERA MODULE ACTUATOR

Номер: US20180074283A1
Автор: CHOI Woo Young, HONG Byung Joo, Ko Joo Yul, Lee Jong Woo, LEE Joo Hyoung, Lee Soo Woong, RYU Je Hyuk
Принадлежит: SAMSUNG ELECTRO-MECHANICS CO., LTD.

A camera module actuator includes, a magnet, a coil, a driver, and a position estimating processor. The coil is disposed to face the magnet. The driver is configured to move the magnet by applying a driving signal to the coil. The position estimating processor is configured to estimate a position of the magnet from an oscillating signal. A frequency of the oscillating signal varies according to a movement of the magnet. 1. A camera module actuator , comprising:a magnet;a coil disposed to face the magnet;a driver configured to move the magnet by applying a driving signal to the coil; anda position estimating processor configured to estimate a position of the magnet from an oscillating signal,wherein a frequency of the oscillating signal varies according to a movement of the magnet.2. The camera module actuator of claim 1 , wherein the position estimating processor estimates the position of the magnet from the frequency of the oscillating signal calculated by counting a reference clock using the oscillating signal.3. The camera module actuator of claim 2 , wherein the position estimating processor calculates the frequency of the oscillating signal using the counted number of the reference clock and a frequency of the reference clock.4. The camera module actuator of claim 3 , wherein the position estimating processor sequentially calculates the frequency of the oscillating signal by temporally delaying a counting point at reference times.5. The camera module actuator of claim 1 , wherein the position estimating processor estimates the position of the magnet claim 1 , using information regarding the position of the magnet corresponding to the frequency of the oscillating signal.6. The camera module actuator of claim 1 , wherein the position estimating processor comprises an oscillating circuit generating the oscillating signal and comprising an inductor configured to determine the frequency of the oscillating signal.7. The camera module actuator of claim 6 , wherein the ...

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Номер записи: 40
07-03-2019 дата публикации

MOTOR STARTING STATE RECOGNITION METHOD AND DEVICE, AND MOTOR

Номер: US20190074782A1
Автор: Sun Jie, Zhang Qian
Принадлежит:

A motor starting state recognition method and device, and a motor. The method includes sampling the counter electromotive forces of any two phases of a motor, and calculating a linear counter electromotive force of the motor according to the counter electromotive forces of the two phases, acquiring a polarity flag bit of the motor, and determining the starting state of the motor according to the polarity flag bit and the linear counter electromotive force. The state of a motor before starting can be recognized effectively using the method, so that the problem where a motor may not be started normally or the success rate of starting is low under the condition of a favorable/dead wind is effectively solved, and the problem where a motor becomes severely worn out and has a shorter service life after frequent starting due to starting failure is avoided. Moreover, the method is simple and highly accurate, and the success rate and reliability of system starting are effectively improved. 1. A method for identifying a starting state of a motor , comprising:sampling back electromotive forces of any two phases of the motor and calculating a line back electromotive force according to the back electromotive forces of the two phases;acquiring a polarity flag of the motor; anddetermining the starting state of the motor according to the polarity flag and the line back electromotive force.2. The method according to claim 1 , wherein determining the starting state of the motor according to the polarity flag and the line back electromotive force comprises:calculating a sum of the back electromotive forces of the two phases as a SumP if the polarity flag is positive and the line back electromotive force is smaller than 0 in a first pre-set period;calculating a sum of the back electromotive forces of the two phases as a SumN if the polarity flag is negative and the line back electromotive force is greater than 0 in a second pre-set period, in which the second pre-set period is equal to ...

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Номер записи: 41
15-03-2018 дата публикации

CONTROL DEVICE

Номер: US20180076748A1
Автор: ONO Yutaka, YAMASAKI Reiji
Принадлежит:

In a sensorless control of a motor, due to the characteristic of a response frequency, an induced voltage, a magnetic pole position estimation gain, a current control gain, and a speed control gain are closely related. An object of the invention is to enable the induced voltage and the frequency characteristic of a magnetic pole position estimation system to be clearly designed and to theoretically and quantitatively design all of the control gains necessary for the sensorless control so as to solve a problem that a method of designing those parameters cannot be established and the parameters have to be adjusted in a try and error manner. A control device has an estimator estimating an estimation induced voltage and a phase error of a motor by applying an induced-voltage observer and a controller controlling the motor on the basis of the estimation induced voltage and the phase error. 1. A control device comprising:an estimator estimating an estimation induced voltage and a phase error of a motor by applying an induced-voltage observer, anda controller controlling the motor on the basis of the estimation induced voltage and the phase error.2. The control device according to claim 1 ,wherein the estimator comprises:an induced-voltage observer estimating an estimation induced voltage and a phase error of the motor on the basis of a magnetic pole position estimation value of the motor estimated in the past, a target voltage, and a response current;an induced-voltage computing unit dividing the induced voltage by an induced-voltage coefficient;a phase computing unit performing integration by multiplying the phase error with an error angle integration gain, anda first subtracter obtaining a magnetic pole position estimation value by subtracting a computation result of the phase computing unit from a computation result of the induced-voltage computing unit.3. The control device according to claim 2 , further comprising:a speed computing unit calculating a rotation speed ...

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Номер записи: 42
15-03-2018 дата публикации

CONTROLLER FOR PERMANENT MAGNET SYNCHRONOUS MOTOR, CONTROL METHOD, AND IMAGE FORMING APPARATUS

Номер: US20180076750A1
Автор: Asano Hitoshi, Fujimori Harumitsu, SAKAI Katsuhide, TAMURA TOMONOBU, Yoshida Kazumichi
Принадлежит: KONICA MINOLTA, INC.

A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet includes a drive portion configured to apply a current to a winding to drive the rotor; an estimating portion configured to estimate a position of magnetic pole of the rotor; and a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated position of magnetic pole and to control the drive portion to stop the rotor in response to a stop command inputted. The control unit controls, as the control to stop the rotor, the drive portion to determine a current for generating a magnetic field vector which draws the position of magnetic pole of the rotor to a stop position to stop the rotor based on a latest estimated position of magnetic pole, and to keep applying the current determined to the winding. 1. A controller for a permanent magnet synchronous motor having a rotor using a permanent magnet , the rotor rotating by a rotating magnetic field caused by a current flowing through a winding , the controller comprising:a drive portion configured to apply a current to the winding to drive the rotor;an estimating portion configured to estimate a position of magnetic pole of the rotor based on the current flowing through the winding; anda control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated position of magnetic pole and to control the drive portion to stop the rotor in response to a stop command inputted; whereinthe control unit controls, as the control to stop the rotor, the drive portion to determine a current for generating a magnetic field vector which draws the position of magnetic pole of the rotor to a stop position to stop the rotor based on a latest estimated position of magnetic pole, and to keep applying the current determined to the winding.2. The controller for the permanent magnet synchronous motor according to claim 1 , wherein the stop position falls ...

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Номер записи: 43
24-03-2022 дата публикации

ROTOR POSITION SENSING SYSTEM FOR PERMANENT MAGNET SYNCHRONOUS MOTORS AND RELATED METHODS

Номер: US20220094286A1
Автор: OKUBAYASHI Masanori
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Implementations of a system for sensing rotor position of a PMSM may include: a controller which may be coupled with the PMSM. The controller may be configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response. A comparator may be coupled to the PMSM configured to receive and to compare each one of the plurality of sensing signals with a threshold voltage. A rise time measurement circuit may calculate a plurality of rise times using the plurality of sensing signals in response to receiving a signal from the comparator. The rotor-angle estimation circuit may be configured to identify from the plurality of rise times a shortest rise time and a voltage vector corresponding with the shortest rise time and thereby identify the position of the rotor of the PMSM. 1. A system for sensing rotor position of a permanent magnet synchronous motor , comprising:a controller configured to couple with a permanent magnet synchronous motor (PMSM), wherein the controller is configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response;a rise time measurement circuit configured to couple to the PMSM, wherein the rise time measurement circuit is configured to calculate a plurality of rise times using at least a first threshold current and a second threshold current;a memory coupled with the rise time measurement circuit, wherein the memory is configured to store the plurality of rise times; anda rotor-angle estimation circuit coupled with the memory, wherein the rotor-angle estimation circuit is configured to calculate a rotor position relative to the stator of the PMSM using the plurality of rise times;wherein the controller is configured to generate the first threshold current and the second threshold current.2. The system of claim 1 , further comprising an amplifier coupled to a resistor claim 1 , wherein the amplifier is ...

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Номер записи: 44
24-03-2022 дата публикации

HIGH FREQUENCY INJECTION TRANSITION DISTURBANCE ELIMINATION FOR A SALIENT POLE ELECTRIC MACHINE

Номер: US20220094295A1
Автор: Lamb Jacob, ZHANG Zhendong
Принадлежит:

For high frequency injection (HFI) transition disturbance elimination, a processor directs an HFI transition for a motor. The processor determines compensation pulse voltages for an HFI compensation pulse. The processor further injects a sum of the HFI compensation pulse and an HFI voltage into a current regulator voltage output signal for a compensation Pulse Width Modulation (PWM) cycle. The HFI compensation pulse settles an HFI current to a steady state 1. An apparatus comprising:a processor;a memory storing code executable by the processor to perform:directing a High Frequency Injection (HFI) transition for a motor;determining compensation pulse voltages for an HFI compensation pulse;injecting a sum of the HFI compensation pulse and an HFI voltage into a current regulator voltage output signal for a compensation Pulse Width Modulation (PWM) cycle, wherein the compensation PWM consists of a last PWM cycle before the HFI transition or a first PWM cycle after the HFI transition and the HFI compensation pulse settles an HFI current to a steady state.2. The apparatus of claim 1 , the processor further controlling the motor with the current regulator voltage output signal.3. The apparatus of claim 1 , wherein the HFI voltage is selected from the group consisting of pulse voltage injection claim 1 , rotating voltage injection claim 1 , and square wave voltage injection.4. (canceled)5. (canceled)6. The apparatus of claim 1 , wherein the HFI current settles to the steady state in less than 10 percent a machine time constant for the motor.8. A method comprising:directing, by use of a processor, a High Frequency Injection (HFI) transition for a motor;determining compensation pulse voltages for an HFI compensation pulse;injecting a sum of the HFI compensation pulse and an HFI voltage into a current regulator voltage output signal for a compensation Pulse Width Modulation (PWM) cycle, wherein the compensation PWM consists of a last PWM cycle before the HFI transition or a ...

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Номер записи: 45
31-03-2016 дата публикации

Door Operator System Capable of Detecting a Current- Time Position of a Movable Barrier

Номер: US20160090772A1
Автор: HSIEH Chung-Hsien
Принадлежит:

A door operator system capable of detecting a current-time position of a movable barrier comprises a current-time position detecting device comprising a first gear, a first angular position sensing unit, a revolution counting unit and an arithmetic unit. The first gear is coupled to an output shaft of a motor or a winding shaft. The first angular position sensing unit is provided for detecting a first angular position of the first gear. The revolution counting unit counts the number of revolutions of the first gear. The arithmetic unit calculates a number of total circumferential intervals of the output shaft of the motor or the winding shaft based on D=(La*X)+A/(360/X), where D is the number of the total circumferential intervals, La is the number of revolutions of the first gear, A is the first angular position, X is a number of circumferential intervals per revolution of the first gear. 1. A door operator system comprising an electric motor having an output shaft , a current-time position detecting device and a winding shaft for winding or unwinding a movable barrier , the output shaft of the electric motor being coupled to the winding shaft , wherein the current-time position detecting device comprises:a first gear coupled to the output shaft of the electric motor or the winding shaft;a first angular position sensing unit provided for detecting a first angular position of the first gear;a revolution counting unit for counting a number of revolutions of the first gear; and {'br': None, 'i': D', 'La*X', 'A', 'X, '=()+/(360/)\u2003\u2003(1)'}, 'an arithmetic unit electrically connected to both of the first angular position sensing unit and the revolution counting unit, the arithmetic unit receiving the first angular position from the first angular position sensing unit and the number of revolutions from the revolution counting unit and calculating a number of total circumferential intervals of the output shaft of the electric motor or the winding shaft based ...

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Номер записи: 46
12-03-2020 дата публикации

ELECTRIC MOTOR CONTROL DEVICE AND ELECTRIC MOTOR CONTROL METHOD

Номер: US20200083834A1
Автор: FUJIWARA Hiroshi, SAEGUSA FUMITAKE, Tazawa Toru
Принадлежит: Panasonic Intellectual Property Management Co., Ltd.

An electric motor control device performing feedback control of a state amount of an electric motor or a load and being capable of changing a control bandwidth of a feedback control system includes: a notch filter arranged in the feedback control system and having a filter coefficient which is changeable; a notch control section which changes a notch frequency as a center frequency of the notch filter to remove an oscillation component attributable to mechanical resonance related to the electric motor; and a control coefficient setting section which changes at least one of the control bandwidth or the filter coefficient of the notch filter in accordance with the control bandwidth and the notch frequency to stabilize the feedback control system. 1. An electric motor control device performing feedback control of a state amount of an electric motor or a load and being capable of changing a control bandwidth of a feedback control system , the electric motor control device comprising:a notch filter arranged in the feedback control system, the notch filter having a filter coefficient which is changeable;a notch control section which changes a notch frequency as a center frequency of the notch filter to remove an oscillation component attributable to mechanical resonance related to the electric motor; anda control coefficient setting section which changes at least one of the control bandwidth or the filter coefficient of the notch filter in accordance with the control bandwidth and the notch frequency to stabilize the feedback control system.2. The electric motor control device according to claim 1 , whereinonly when the notch frequency falls below a predetermined reference value, the control coefficient setting section changes at least one of the control bandwidth or the notch frequency to stabilize the feedback control system.3. The electric motor control device according to claim 1 , whereinthe notch control section changes the notch frequency only within a predefined ...

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Номер записи: 47
31-03-2022 дата публикации

SEMICONDUCTOR DEVICE, MOTOR DRIVE SYSTEM, AND METHOD OF STARTING MOTOR

Номер: US20220103100A1
Автор: KUROSAWA Minoru, NARUMI Satoshi, OHTSUKI Takeshi
Принадлежит:

The magnetic pole position of the rotor is estimated with high accuracy at the initial start of a three-phase motor of the sensorless system. Semiconductor device for driving and controlling the three-phase motor of the sensorless system have a detector connected to the three-phase output nodes of the inverter circuit and the virtual neutral point (or neutral point), and detecting a voltage generated in the output node of the non-energized phase of the three-phase. Controller applies the initial drive voltage by the inverter circuit to any two phases of the three-phase motor based on the estimated position of the magnetic pole of the rotor in the stop state. Controller estimates the position of the rotor based on a difference voltage detected by the detector in a driving voltage applying period and a regeneration period immediately after or immediately before the driving voltage applying period. 1. A semiconductor device for controlling a three-phase motor comprising:a detection circuit coupled to output nodes corresponding to each phase of the three-phase motor, and configured to detect a voltage generated in the output node of a non-energized phase of the three-phase motor; anda controller,wherein, at a time of starting the three-phase motor, the controller applies a drive voltage to any two phases of the three-phase motor, based on an estimated magnetic pole position of a rotor in a stop state, and the controller estimates an position of the rotor based on a difference voltage between a detected voltage by the detector circuit during a drive voltage applying period and a detected voltage by the detector circuit during a regeneration period immediately after or immediately before the drive voltage applying period.2. The semiconductor device according to claim 1 , wherein the drive voltage is based on pulse-width modulation.3. The semiconductor device according to claim 2 , wherein claim 2 , when an absolute value of the difference voltage is less than or equal to ...

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Номер записи: 48
21-03-2019 дата публикации

METHOD AND DEVICE FOR PROCESSING A SIGNAL

Номер: US20190086240A1
Автор: Lechner Benjamin, Raichle Daniel, Ungermann Michael, Zirkel Daniel
Принадлежит:

The present invention relates to the signal processing of signals with the simultaneous conversion of the operating time grid. To this end, a signal is detected or provided in a first time grid. After the difference quotient is calculated in the first time grid, the difference quotient is output in a second time grid in which the signal, in particular the difference quotient, is further processed. 1. A device for processing a signal , the device comprising:a detecting device, which is designed to detect a signal with a first sampling rate in a first time grid;a differentiating device, which is designed to differentiate the detected signal in the first time grid and output it in a second time grid; anda processing device, which is designed to process the differentiated signal in the second time grid,the time intervals in the first time grid being smaller than the time intervals in the second time grid.21. The device as claimed in claim 1 , the processing device comprising a PT element.3. The device as claimed in claim 1 , the differentiating device being designed to subtract a value of a signal detected by the detecting device from a value that has previously been detected by the detecting device claim 1 , and to divide the differences by the time interval of the two detected signals.4. The device as claimed in claim 1 , the differentiating device being designed to output the differentiated signal in the second time grid to the processing device.5. The device as claimed in claim 1 , the first sampling rate in the first time grid being variable.6. A drive system claim 1 , comprising:an electrical machine, which is coupled to a drive shaft;a rotational angle sensor, which is coupled to the drive shaft and is designed to provide a signal corresponding to the angular position of the drive shaft; and a detecting device, which is designed to detect a signal with a first sampling rate in a first time grid;', 'a differentiating device, which is designed to differentiate the ...

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Номер записи: 49
21-03-2019 дата публикации

METHOD, ANGLE DETERMINATION APPARATUS AND CONTROL APPARATUS

Номер: US20190089282A1
Автор: Chen Lei, Goetting Gunther
Принадлежит:

The present invention discloses a method for determining a rotor angle of a rotor of an electric machine, having the steps of producing a torque-dependent test signal which depends on the torque of the electric machine and has a higher frequency than a supply signal for the electric machine, controlling the electric machine using the supply signal and the test signal which is superimposed on the supply signal, recording phase currents of the electric machine, and determining the rotor angle of the rotor of the electric machine on the basis of the effects of the test signal on the phase currents. The present invention also discloses an angle determination apparatus and a corresponding control apparatus. 1123. A method for determining a rotor angle () of a rotor () of an electric machine () , having the following steps:{'b': 1', '5', '4', '3', '6, 'sup': '3),', 'generating (S) a torque-dependent test signal () that depends on the torque () of the electric machine () and has a higher frequency than a supply signal () for the electric machine ('}{'b': 3', '6', '5', '6, 'driving the electric machine () with the supply signal () and with the test signal () which is superimposed on the supply signal (),'}{'b': 13', '14', '15', '3, 'capturing phase currents (, , ) of the electric machine (), and'}{'b': 1', '2', '3', '5', '13', '14', '15, 'determining the rotor angle () of the rotor () of the electric machine () on the basis of the effects of the test signal () on the phase currents (, , ).'}2555051. The method as claimed in claim 1 , wherein the torque-dependent test signal () is generated as a test-voltage vector () in a voltage-vector coordinate system () with a first axis (k) claim 1 , which corresponds to the direction of injection of the test signal () claim 1 , and a second axis () claim 1 , which is perpendicular to the first axis (k) claim 1 ,{'b': 5', '13', '14', '15', '51', '53', '4', '3, 'wherein the test-voltage vector () has only one component in the first axis ...

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Номер записи: 50
21-03-2019 дата публикации

Identification of a Secondary Part During Use in a Linear-Motor-Based System

Номер: US20190089283A1
Автор: HAMM CARSTEN, SPINDLER Carsten, WEDEL Bernd
Принадлежит:

A method for identifying a secondary part during use in a linear-motor-based system, wherein a primary part includes primary-part coils in the linear-motor-based system, the secondary part has a magnetic active part and the primary-part coils can be actuated via a drive current such that an advancing force acting on the secondary part and movement of the secondary part along the primary part is achievable, where at least one secondary-part winding in a circuit is provided on the secondary part, selected primary-part coils are energized via a primary current at one or more test signal frequencies to induce a secondary current in the secondary-part winding to identify the rotor, a characteristic property of the secondary-part winding or the circuit is representative of the secondary part, and where the secondary current influences a current response of the primary-part coils and the characteristic property is measured using the current response. 1. A method for identifying a secondary part during use in a linear-motor-based system , a primary part having primary-part coils being provided in the linear-motor-based system , the secondary part having a magnetic active part for forming a secondary-part magnetic field and the primary-part coils being actuateable via a drive current such that an advancing force acting on the secondary part and a movement of the secondary part along the primary part is achievable , at least one secondary-part winding in a circuit being provided on the secondary part , the method comprising:energizing selected primary-part coils via a primary current at at least one or test signal frequency to induce a secondary current in the secondary-part winding to identifying the rotor, a characteristic property of one of (i) the secondary-part winding and (ii) the circuit being representative of the secondary part;influencing a current response of the primary-part coils via the secondary current; andmeasuring the characteristic property utilizing the ...

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Номер записи: 51
01-04-2021 дата публикации

METHOD AND SYSTEM FOR OBTAINING INITIAL MECHANICAL ANGLE OF ELECTRIC MOTOR

Номер: US20210099112A1
Автор: FAN Qinghe, Long Biao
Принадлежит:

A method for obtaining an initial mechanical angle of an electric motor includes determining a mechanical state of the electric motor, determining an initial electrical angle of the electric motor according to the mechanical state, and determining the initial mechanical angle of the electric motor according to the initial electrical angle. 1. A method for obtaining an initial mechanical angle of an electric motor comprising:determining a mechanical state of the electric motor;determining an initial electrical angle of the electric motor according to the mechanical state; anddetermining the initial mechanical angle of the electric motor according to the initial electrical angle.2. The method according to claim 1 , wherein determining the initial mechanical angle of the electric motor includes:obtaining the initial mechanical angle according to the initial electrical angle and a number N of pole pairs of the electric motor, wherein N≥1.3. The method according to claim 1 , wherein determining the mechanical state of the electric motor includes:determining a power-on mechanical angle when the electric motor is powered on.4. The method according to claim 3 , further comprising:obtaining a power-on electrical angle when the electric motor is powered on; anddetermining the initial electrical angle according to the power-on mechanical angle and the power-on electrical angle.5. The method according to claim 4 , wherein determining the initial electrical angle of the electric motor further includes:determining a current electrical cycle where the electric motor is located according to the power-on mechanical angle; anddetermining the initial electrical angle according to the current electrical cycle and the power-on electrical angle.6. The method according to claim 5 , wherein:the electric motor includes N pole pairs and has N electrical cycles, N≥1;{'sub': 0', '0', 'N', 'N, 'a zeroth electrical angle EAand a zeroth mechanical angle MAcorrespond to an initial limit position ...

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Номер записи: 52
02-06-2022 дата публикации

CONTROL DEVICE FOR AC ROTARY MACHINE AND CONTROL METHOD FOR AC ROTARY MACHINE

Номер: US20220173678A1
Автор: HACHIYA Yosuke, Ito Masato, KAWAHARA Kunihiro, Maruyama Akihiro
Принадлежит: Mitsubishi Electric Corporation

In sensorless control for a rotary machine, when variations in inductances for U, V, W phases due to manufacturing error are great, imbalance occurs among detected currents for the respective phases. Thus, estimation error of a magnetic pole position of a rotor increases, so that positioning accuracy is reduced. Correction filters for imparting gains in accordance with rotary machine constants for the respective phases are provided to control means or magnetic pole position calculation means, thereby correcting the imbalance occurring among the detected currents for the respective phases. 1. An AC rotary machine control device comprising:controller which generates fundamental voltage commands for driving a rotary machine, generates high-frequency voltage commands for estimating a magnetic pole position of a rotor of the rotary machine, and calculates voltage commands using the fundamental voltage commands and the high-frequency voltage commands;voltage applyer to apply voltage to the rotary machine on the basis of the voltage commands;current detector to detect for detecting currents for respective phases of the rotary machine;magnetic pole position calculator which extracts high-frequency currents for the respective phases from the detected currents of the rotary machine, and calculates an estimated position of the magnetic pole position; andan imbalance adjustor to adjust imbalance among the high-frequency currents for the respective phases, whereinthe magnetic pole position calculator calculates the estimated position of the magnetic pole of the rotor of the rotary machine, using the high-frequency currents for which the imbalance has been adjusted.2. The AC rotary machine control device according to claim 1 , whereinthe imbalance adjustor imparts gains based on rotary machine constants for the respective phases of the rotary machine to the high-frequency currents for the respective phases, to adjust the imbalance among the high-frequency currents for the ...

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Номер записи: 53
02-04-2020 дата публикации

VEHICLE SYSTEM, MOTOR CONTROL SYSTEM AND MOTOR CONTROL METHOD

Номер: US20200106374A1
Автор: Cho Hyoungjun, Kim Yeonho, Park Sangjin, YOUN Seung Hyun
Принадлежит:

A motor control system is provided. The system includes an inverter that adjusts a stator current applied to a stator coil of a wound-rotor drive motor and a rotor current applied to a rotor coil of the drive motor. When an abnormal starting of the drive motor is detected and a movement of the vehicle is restricted by electronic parking brakes (EPB), a motor controller adjusts the rotor current through the inverter to cancel an abnormal starting torque caused by the abnormal starting. 1. A motor control system configured to operate a motor of a vehicle , comprising:an inverter configured to adjust a stator current applied to a stator coil of a wound-rotor drive motor and a rotor current applied to a rotor coil of the drive motor; anda motor controller configured to, when an abnormal starting of the drive motor is detected and a movement of the vehicle is restricted by electronic parking brakes (EPB), adjust the rotor current through the inverter to cancel an abnormal starting torque caused by the abnormal starting.2. The system of claim 1 , wherein the motor controller is configured to detect the abnormal starting by monitoring a torque of the drive motor.3. The system of claim 1 , wherein the motor controller is configured to detect the abnormal starting by monitoring a current of the drive motor.4. The system of claim 1 , wherein when the abnormal starting is detected claim 1 , the motor controller is configured to detect the abnormal starting torque by sensing a position of the rotor.5. The system of claim 4 , wherein when the abnormal starting is detected claim 4 , the motor controller is configured to adjust the rotor current to generate a cancelling torque in a direction for cancelling the abnormal starting torque.6. The system of claim 4 , wherein the cancelling torque is limited to less than a fastening torque of the EPB.7. A vehicle system claim 4 , comprising:electronic parking brakes (EPB) coupled to driving wheels and configured to adjust a parking ...

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Номер записи: 54
26-04-2018 дата публикации

CORRECTING OFFSET AND GAIN DRIFT RELATED ANGLE ERRORS WITH MOTOR POSITION DETECTORS

Номер: US20180115261A1
Автор: STAEBLER Martin, von MOLO Ferdinand
Принадлежит:

A sort buffer includes a phase sector determination circuit, a phase sector update circuit, and a phase sector completion circuit. The phase sector determination circuit is configured to determine a phase sector corresponding to a phase of a first sine and cosine sample pair received from an encoder or resolver. The phase sector update circuit is configured to determine whether a second sine and cosine sample pair corresponding to the phase sector is stored in a lookup table (LUT) and, in response to a determination that a second sine and cosine sample pair corresponding to the phase sector is not stored in the LUT, store the first sine and cosine sample pair in the LUT. The phase sector completion circuit is configured to determine whether the LUT has stored, for each of a plurality of phase sectors, a corresponding sine and cosine sample pair. 1. An electronic device , comprising: a phase sector determination circuit configured to determine a phase sector corresponding to a phase of the first sine and cosine sample pair, the phase sector included in a plurality of phase sectors;', 'a phase sector update circuit configured to determine whether a second sine and cosine sample pair corresponding to the phase sector is stored in a lookup table (LUT) and, in response to a determination that a second sine and cosine sample pair corresponding to the phase sector is not stored in the LUT, store the first sine and cosine sample pair in the LUT; and', 'a phase sector completion circuit configured to determine whether the LUT has stored, for each of the plurality of phase sectors, a corresponding sine and cosine sample pair; and, 'a sort buffer configured to receive a first sine and cosine sample pair from an encoder or resolver, the sort buffer includingan offset and gain error determination circuit configured to determine a sine and cosine gain and offset error; anda closed loop control circuit configured to determine a sine and a cosine gain and offset correction value ...

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Номер записи: 55
09-04-2020 дата публикации

DEVICE AND METHOD FOR AUTOMATICALLY DETECTING INITIAL POSITION OF ROTOR OF MOTOR

Номер: US20200112274A1
Автор: Tsai Ming-Jung
Принадлежит:

A device and a method for automatically detecting an initial position of a rotor of a motor are provided. The device includes an initial position detector, a lookup table module and a controller. The initial position detector detects input voltages of the motor. The controller compares the input voltages with each other to determine the initial position of the rotor of the motor. The controller obtains a waveform pattern from the lookup table module to construct an activating waveform signal to be outputted to one of steps of the motor that corresponds to the initial position of the rotor to control the motor to run. 1. A device for automatically detecting an initial position of a rotor of a motor having N phases and M steps , M being equal to twice N , the device comprising:an initial position detector connected to a voltage input terminal of each of the phases of the motor and configured to detect an input voltage at the voltage input terminal before the motor runs;a lookup table module configured to store a plurality of lookup table index values and a plurality of waveform patterns that correspond to the lookup table index values respectively; anda controller connected to the initial position detector, the lookup table module and the motor, configured to compare the input voltages with each other from the initial position detector to determine the initial position of the rotor of the motor and a plurality of waveform parameter values, and configured to compare the waveform parameter values with the lookup table index values to obtain one of the waveform patterns that corresponds to the waveform parameter values to construct an activating waveform signal to be outputted to the step of the motor that corresponds to the initial position of the rotor to control the motor to run.2. The device of claim 1 , wherein the waveform patterns includes a plurality of sine waveform patterns claim 1 , and the waveform parameter values include a duty cycle claim 1 , a frequency ...

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Номер записи: 56
16-04-2020 дата публикации

MAGNETIC POLE INITIAL POSITION DETECTION DEVICE USING DIRECT-CURRENT EXCITATION METHOD AND MAGNETIC POLE POSITION DETECTION DEVICE

Номер: US20200119677A1
Автор: MORITA Yuuki, Takahashi Kenji
Принадлежит: FANUC Corporation

A magnetic pole initial position detection device includes: a direct-current excitation command generation section configured to generate a first command for causing a constant excitation current with a current phase fixed to a first phase to flow through the synchronous motor; a torque-zero determination section configured to determine whether a torque generated in the rotor of the synchronous motor is zero when the excitation current based on the first command flows through the synchronous motor; and a magnetic pole initial position acquisition section configured to acquire the magnetic pole initial position of the rotor of the synchronous motor on a basis of a rotor actual position at or near a point in time when the torque-zero determination section determines that the torque is zero; a number of pole pairs of the synchronous motor; and an excitation phase during direct-current excitation under the first command. 1. A magnetic pole initial position detection device configured to detect a magnetic pole initial position of a rotor of a synchronous motor , the magnetic pole initial position detection device comprising:a direct-current excitation command generation section configured to generate a first command for causing a constant excitation current with a current phase fixed to a first phase to flow through the synchronous motor;a torque-zero determination section configured to determine whether a torque generated in the rotor of the synchronous motor is zero when the excitation current based on the first command flows through the synchronous motor; anda magnetic pole initial position acquisition section configured to acquire the magnetic pole initial position of the rotor of the synchronous motor on a basis of a rotor actual position at or near a point in time when the torque-zero determination section determines that the torque is zero; a number of pole pairs of the synchronous motor; and an excitation phase during direct-current excitation under the first ...

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Номер записи: 57
27-05-2021 дата публикации

Pole direction detection device and pole direction detection method

Номер: US20210159824A1
Автор: Takashi Okamoto, Yuuki Morita
Принадлежит: FANUC Corp

A pole direction detection device for detecting a pole direction of a synchronous motor having saliency comprises a high-frequency voltage application unit that applies a high-frequency voltage to the motor; an excitation phase change unit that changes an excitation phase of the motor to an arbitrary phase; a driving current detection unit that detects a driving current value of the motor; a pole direction estimation unit that detects a pole direction based on the excitation phase and the driving current value; a measurement unit that measures an inductance value of the motor; and a control unit that changes a frequency of the high-frequency voltage to be applied by the high-frequency voltage application unit based on the inductance value measured by the measurement unit.

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Номер записи: 58
10-05-2018 дата публикации

APPARATUS FOR GENERATING EXCITATION SIGNAL OF RESOLVER AND VEHICLE INCLUDING THE SAME

Номер: US20180128651A1
Автор: Kang Gun Soo, Kim Seonghan, Kong Hun
Принадлежит:

An apparatus for generating a resolver excitation signal and a vehicle including the same are provided. The apparatus includes an input portion that is configured to receive an input signal and a current amplifier that is configured to generate an output signal by amplifying the input signal and that has a circuit protector that protects a circuit from an overcurrent. An output portion is configured to output the output signal. Additionally, the circuit protector includes a first transistor that has an emitter connected to the output portion, a second transistor that has a collector connected to the output portion and a base connected to a base of the first transistor and a rectifier connected to a base of the first transistor and the base of the second transistor. 1. An apparatus for generating an excitation signal , comprising:an input portion configured to receive an input signal;a current amplifier configured to generate an output signal by amplifying the input signal, and having a circuit protector that protects a circuit from an overcurrent; andan output portion configured to transmit the output signal, a first transistor having an emitter connected to the output portion;', 'a second transistor having a collector connected to the output portion and a base connected to a base of the first transistor; and', 'a rectifier connected to a base of the first transistor and the base of the second transistor., 'wherein the circuit protector includes2. The apparatus according to claim 1 , wherein a base of the first transistor claim 1 , the base of the second transistor claim 1 , and the rectifier are connected to one node.3. The apparatus according to claim 1 , further comprising:a voltage amplifier having an inversion input terminal connected to the input portion and an output terminal connected to the rectifier, configured to amplify the input signal and transmit the amplified input signal to the rectifier.4. The apparatus according to claim 3 , wherein the inversion ...

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Номер записи: 59
11-05-2017 дата публикации

Electric motor control device

Номер: US20170133963A1
Автор: Kiyoshi Uetsuji, Makio OSHITA, Satoshi Umemura, Toshihiro Yamamichi, Yoshihiro Maeda
Принадлежит: Toyota Industries Corp

A sensorless electric motor control device is provided that completes a phase detection of a rotor before an activation signal is received, so as to shorten a time period from when the activation signal is received to when the rotor reaches a target number of rotations. The control device for a sensorless electric motor 10 includes an inverter 11 that drives the electric motor 10 and a first processor 18 that serves as a phase detection unit that causes the inverter 11 to perform a phase detection before the inverter 11 receives an activation signal that activates the electric motor 10, wherein the phase detection aligns a magnetic pole of a rotor of the electric motor 10 with a predetermined position with respect to a stator.

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Номер записи: 60
11-05-2017 дата публикации

Method for reliable control of high rotor pole switched reluctance machine

Номер: US20170133967A1
Автор: Mahesh Krishnamurthy, Trevor Creary
Принадлежит: Software Motor Co

A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; storing the self-inductance value and the first current value for each of the stator phases; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; storing the mutual inductance value and the second current value for each of the stator phases; estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.

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Номер записи: 61
23-04-2020 дата публикации

SENSORLESS MOTOR CONTROL

Номер: US20200127587A1
Автор: Burggraf Maximilian, Roemmelmayer Christopher
Принадлежит:

A controller circuit for a brushless direct current (BLDC) motor may be configured to estimate a rotor position of the BLDC motor and apply a constant start-up voltage to a stator winding of the BLDC motor using the estimated rotor position until a current at the stator winding corresponds to a local minimum current. The controller circuit may be further configured to, in response to the current at the stator winding corresponding to the local minimum current, allow commutation of the current at the stator winding, calculate the rotor position in response to allowing the commutation of the current at the stator winding, and commutate the current at the stator winding using the calculated rotor position. 120-. (canceled)21. A controller circuit for a brushless direct current (BLDC) motor , the controller circuit being configured to:estimate an initial rotor position of the BLDC motor;apply an initial voltage or an initial current at a stator winding of the BLDC motor based on the estimated initial rotor position of the BLDC motor;in response to the initial voltage or the initial current applied at the stator winding satisfying a predetermined condition, allow commutation of a current at the stator winding;calculate a rotor position in response to allowing the commutation of the current at the stator winding; andcommutate the current at the stator winding using the calculated rotor position.22. The controller circuit of claim 21 , wherein the controller circuit is configured to:apply the initial voltage at the stator winding of the BLDC motor until the current at the stator winding corresponds to a local minimum current; andin response to the current at the stator winding corresponding to the local minimum current, allow the commutation of the current at the stator winding.24. The controller circuit of claim 22 , wherein the controller circuit is configured to determine the current at the stator winding corresponds to the local minimum current when a time derivative ...

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Номер записи: 62
03-06-2021 дата публикации

Systems and methods for calculating motor position, inertia and rest position in sensorless brushed dc motor control systems, and for determining seat occupant weight based on motor current

Номер: US20210167704A1
Автор: Dusko Petrovski, Patrick Jordan
Принадлежит: Gentherm Inc

A system includes a motor control module and an occupant weight classification module. The motor control module is configured to supply power to a motor to move a seat in a first direction from a first position to a second position when the seat is unoccupied and supply power to the motor to move the seat in a second direction from a third position to a fourth position when an occupant is in the seat. The occupant weight classification module is configured to measure a first frequency of ripples in current supplied to the motor as the seat is moved from the first position to the second position, measure a second frequency of ripples in the current supplied to the motor as the seat is moved from the third position to the fourth position, and determine a weight of the occupant based on the first and second frequencies.

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Номер записи: 63
08-09-2022 дата публикации

Method and Device for Controlling a Synchronous Machine without a Position Sensor by Means of Unique Assignment of the Flux Linkage to the Rotor Position

Номер: US20220286071A1
Автор: Kuehl Sascha, Landsmann Peter, Paulus Dirk
Принадлежит: KOSTAL Drives Technology GmbH

A method is for use with a synchronous machine having a stator and a rotor with or without permanent magnets. In operation, electric current of the synchronous machine responsive to the synchronous machine being actuated via clocked terminal voltages is measured. A magnetic flux linkage is determined based on the clocked terminal voltages and the measured electric current. A profile of the magnetic flux linkage as a function of rotation of the rotor, under a boundary condition of an at least two-dimensional electric current vector that is unchanged in coordinates of the stator, is used to detect a position of the rotor. The synchronous machine is controlled according to the rotor position. 1. A method for use with a synchronous machine having a stator and a rotor with or without permanent magnets , the method comprising:measuring electric current of the synchronous machine responsive to the synchronous machine being actuated via clocked terminal voltages;determining a magnetic flux linkage based on the clocked terminal voltages and the measured electric current;using a profile of the magnetic flux linkage as a function of rotation of the rotor, under a boundary condition of an at least two-dimensional electric current vector that is unchanged in coordinates of the stator, to detect a position of the rotor, andcontrolling the synchronous machine according to the rotor position.2. The method according to further comprising:storing multiple profiles of the magnetic flux linkage as a function of the rotor rotation in a model for different electric current values, from which a profile is selected according to the measured electric current, by which the position of the rotor is detected.3. The method according to wherein:only the magnetic flux linkage and the electric current vector, and the stored profiles of the magnetic flux linkage, are used for detecting the position of the rotor, and the position of the rotor is neither directly nor indirectly fed back to detect a ...

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Номер записи: 64
30-04-2020 дата публикации

MOTOR DRIVING APPARATUS

Номер: US20200136538A1
Автор: JUNG Hansu, KIM Kwang Sik, LEE Chungill
Принадлежит:

The present disclosure relates to a motor driving apparatus and, more specifically, to a motor driving apparatus which allows a maximum torque operation by correcting an angle error occurring during quick acceleration of a motor in a sensorless system. The motor driving apparatus comprises: an inverter for driving a motor, using an alternating current voltage; and a control unit for outputting a PWM signal for controlling an operation of a switching element included in the inverter. Here, the control unit determines an inductance parameter used to calculate a speed command value for determining a duty ratio of a PWM signal, and determines whether the motor is being accelerated, on the basis of a current change measured from the inverter. When the motor is being accelerated, the control unit enables a maximum torque operation by reducing an angle error of a rotor through a correction of reducing a previously-determined inductance parameter. 1. A motor driving apparatus , comprising:an inverter that drives a motor; anda control unit that outputs a PWM signal for controlling operations of a switching element included in the inverter,wherein the control unit determines an inductance parameter used to calculate a speed command value for determining a duty ratio of the PWM signal, andthe control unit corrects a size of the determined inductance parameter, on the basis of whether the motor is being accelerated.2. The motor driving apparatus of claim 1 , wherein the control unit determines whether the motor is being accelerated claim 1 , on the basis of a change in electric currents measured by the inverter claim 1 , andwherein, when the motor is being accelerated, the control unit reduces a size of the inductance parameter.3. The motor driving apparatus of claim 2 , wherein the control unit reduces a size of the inductance parameter using a predetermined correction ratio claim 2 , andthe correction ratio is determined on the basis of a change in speeds of the motor.4. The ...

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Номер записи: 65
30-04-2020 дата публикации

METHOD OF ESTIMATING AN OPERATING STATE OF A DRIVE SYSTEM AND DRIVE SYSTEM

Номер: US20200136542A1
Автор: Baltasar Badaya Raul
Принадлежит: ROCHE DIAGNOSTICS OPERATIONS, INC.

A method of estimating an operating state of a drive system is presented. The drive system comprises an electric motor and a mechanical unit being moved by the electric motor. The method comprises a) operating the electric motor using electrical properties, b) determining movement properties regarding the movement of the mechanical unit using the electrical properties, repeating steps a) and b) for a number of times using changed electrical properties, and generating a distribution function. The distribution function allocates electrical properties to the resulting movement properties. The method also comprises estimating the operating state in response to the generated distribution function. 1. A method of estimating an operating state of a drive system , wherein the drive system comprises an electric motor and a mechanical unit being moved by the electric motor , the method comprises:a) operating the electric motor using electrical properties;b) determining movement properties regarding the movement of the mechanical unit using the electrical properties;c) repeating steps a) and b) for a number of times using changed electrical properties;d) generating a distribution function, wherein the distribution function allocates the electrical properties used to the resulting movement properties; ande) estimating the operating state in response to the generated distribution function.2. The method according to claim 1 , wherein the electrical properties comprise a torque provided by the electric motor.3. The method according to claim 1 , wherein the electrical properties comprise a current applied to the electric motor.4. The method according to claim 1 , wherein the movement properties comprise a duration needed to move the mechanical unit for a given distance.5. The method according to claim 1 , wherein the movement properties comprise a distance covered by the mechanical unit for a given duration.6. The method according to claim 1 , wherein the movement properties ...

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Номер записи: 66
11-06-2015 дата публикации

System and method for error correction in angular position sensors

Номер: US20150158396A1
Автор: James E. WALTERS, Ronald J. KREFTA
Принадлежит: Allison Transmission Inc

A system and method for controlling a rotating E-machine and for correcting a rotational position signal output by an angular position sensor operatively connected to the E-machine in conjunction with a sensor digital converter is disclosed. For each angular operating speed of interest, a set of signals as a function of position is taken such that the harmonics (or sub-harmonics) related to the position sensor may be determined and isolated from errors due to an associated digital converter. From this information, the magnitude and phase of the position sensor harmonics is determined. The effects of the sensor digital converter (or other signal processing equipment) are then determined and accounted for, allowing the control system to apply the total position error signal to the position sensor output signal to determine a corrected position sensor signal for use in controlling the E-machine.

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Номер записи: 67
17-06-2021 дата публикации

Position estimation method and position control device

Номер: US20210180990A1
Автор: Atsushi Fujita, Shota ISHIGAMI, Tomohiro Fukumura
Принадлежит: Nidec Corp

A method of position estimation including: a signal detection step in which N (where N is an integer of 3 or more) sensors each detect a magnetic field which is in accordance with a position of a mover and output a detection signal as an electrical signal, the detection signals being displaced in phase by an angle obtained by dividing 360 degrees by N; a crossing detection step in which a crossing detection section sequentially detects a crossing at which each detection signal having been output through the signal detection step crosses another; a subdivision detection step in which a subdivision detection section detects a portion of the detection signal that connects from a crossing to another crossing which is adjacent to that crossing, as one or more subdivision signals; and a line segment joining step in which a line segment joining section sequentially joins the subdivision signals and estimates the position of the mover based on the plural subdivision signals having been joined, to generate an estimated position value signal.

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Номер записи: 68
15-09-2022 дата публикации

Brushless motor driving device, driving method for a brushless motor, and brushless motor

Номер: US20220294369A1
Автор: SHEN Wang
Принадлежит: Toshiba Corp, Toshiba Electronic Devices and Storage Corp

According to one embodiment, a motor driving device includes an output part that supplies an exciting current to an exciting coil, a position detection part that detects a rotational position of a rotor, and a driving control part that produces a driving signal that is based on a detection signal from the position detection part and supplies it to the output part. The position detection part has first, second, and third detection elements that are integrally integrated together with the driving control part and detect rotational positions of the rotor.

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Номер записи: 69
07-05-2020 дата публикации

MOTOR CONTROL APPARATUS AND MOTOR CONTROL METHOD

Номер: US20200144944A1
Автор: KANAZAWA Kazunari, MARUYAMA Makoto, OGAWA Yuji, Tomizaki Takeshi, USIRO Nobumasa
Принадлежит: SINFONIA TECHNOLOGY CO., LTD.

A motor control apparatus includes a fixed phase setting section that sets a fixed phase of a motor according to a detection signal. At the start of rotation of a rotor, the fixed phase setting section sets a first fixed phase that is equal to or greater than −90 degrees relative to a stable stopping point at a maximum electrical angle and is equal to or less than 90 degrees relative to a stable stopping point at a minimum electrical angle of the rotor as the fixed phase, and sets a second fixed phase that is equal to or greater than −90 degrees relative to a stable stopping point at a maximum electrical angle and is equal to or less than 90 degrees relative to a stable stopping point at a minimum electrical angle of the rotor. 1. A motor control apparatus that controls driving of a motor , comprising:a rotation position detecting section that, at every 180 degrees of an electrical angle of the motor, outputs two kinds of detection signals according to a rotation position of a rotor of the motor;a fixed phase setting section that sets a fixed phase of the motor according to the detection signal;an estimated phase calculating section that calculates an estimated phase using the detection signal and the fixed phase; anda motor drive control section that controls rotation of the rotor based on the fixed phase or the estimated phase;wherein:the fixed phase setting section:at a start of rotation of the rotor, in accordance with the detection signal, sets as the fixed phase a first fixed phase that is equal to or greater than −90 degrees in terms of electrical angle relative to a stable stopping point at a maximum electrical angle and is equal to or less than 90 degrees in terms of electrical angle relative to a stable stopping point at a minimum electrical angle among stable stopping points of the rotor, andupon the kind of the detection signal that is outputted from the rotation position detecting section switching due to rotation of the rotor, in accordance with the ...

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Номер записи: 70
07-06-2018 дата публикации

SENSOR ERROR DETECTION AND CORRECTION

Номер: US20180159455A1
Автор: Pietromonaco David Victor
Принадлежит:

Electric motors may include one or more sensors usable to determine rotor alignment and/or speed. A method and apparatus for rotor alignment and/or speed error detection and/or correction are proposed, such as using signals from one or more sensors. A method and apparatus for controlling stator tooth activation based, at least in part, on corrections and offsets is also disclosed. 1. A method comprising:determining an estimated speed and estimated alignment of a rotor based, at least in part, on signals obtained from at least one sensor of a plurality of sensors;determining an alignment offset based, at least in part, on the estimated rotor speed and alignment of the rotor; andtransmitting one or more current pulses to one or more coil windings of a stator based, at least in part, on the alignment offset.2. The method of claim 1 , wherein determining the estimated rotor speed further comprises recording a first timestamp corresponding to a time at which a sensor of the plurality of sensors detects a rotor tooth and recording a second timestamp corresponding to a next time at which the sensor of the plurality of sensors detects a rotor tooth.3. The method of claim 2 , further comprising determining the estimated rotor speed based claim 2 , at least in part claim 2 , on a time difference between the first timestamp and the second timestamp.4. The method of claim 1 , wherein determining the estimated rotor alignment further comprises recording a timestamp corresponding to a time at which a sensor of the plurality of sensors detects a rotor tooth and two or more other sensors of the plurality of sensors do not detect a rotor tooth.5. The method of claim 1 , further comprising:determining a timing window corresponding to a time at which a rotor tooth is expected to be detected by a sensor of the plurality of sensors; andincrementing an error count responsive to a determination that the rotor tooth is not detected by the sensor of the plurality of sensors in the ...

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Номер записи: 71
21-06-2018 дата публикации

CONTROL DEVICE FOR A POLYPHASE MOTOR AND METHOD FOR DRIVING A POLYPHASE MOTOR

Номер: US20180175753A1
Автор: Rothkranz Heiko, Schult Jens, Wangemann Joerg
Принадлежит:

An actuating apparatus for a polyphase motor includes five phase terminals for connecting of in each case one phase of the polyphase motor, a high terminal for applying a supply voltage (U), a low terminal for applying a reference potential of the supply voltage (U), a control device, wherein the control device is adapted, in four of the five phase terminals, to impress a pulse-width-modulated voltage pattern by connecting the phase terminals to the high terminal or the low terminal so that in the first phase terminal, an evaluation signal which is dependent on the angle of rotation of the polyphase motor is produced, and wherein the control device is adapted to determine the angle of rotation and/or a commutation condition of the polyphase motor from the evaluation signal. 1. An actuating apparatus for a polyphase motor , comprising:five phase terminals for connecting in each case a phase of the polyphase motor;{'sub': 'B', 'a high terminal for applying a supply voltage (U);'}{'sub': 'B', 'a low terminal for applying a reference potential of the supply voltage (U);'}a control device;wherein the control device is adapted, in four of the five phase terminals, to impress a pulse-width-modulated voltage pattern by connecting the phase terminals to the high terminal or the low terminal so that in the first phase terminal, an evaluation signal which is dependent on the angle of rotation of the polyphase motor is produced; andwherein the control device is adapted to determine the angle of rotation and/or a commutation condition of the polyphase motor from the evaluation signal.2. The actuating apparatus according to claim 1 , further comprising a plurality of bridge branches claim 1 , wherein each bridge branch is connected to precisely one of the five phase terminals in order to impress the pulse-width-modulated voltage pattern in the four of the five phase terminals.3. The actuating apparatus according to claim 2 , wherein each of the bridge branches comprises a series ...

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Номер записи: 72
21-06-2018 дата публикации

ROTOR POSITION SENSING SYSTEM FOR PERMANENT MAGNET SYNCHRONOUS MOTORS AND RELATED METHODS

Номер: US20180175755A1
Автор: OKUBAYASHI Masanori
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Implementations of a system for sensing rotor position of a PMSM may include: a controller which may be coupled with the PMSM. The controller may be configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response. A comparator may be coupled to the PMSM configured to receive and to compare each one of the plurality of sensing signals with a threshold voltage. A rise time measurement circuit may calculate a plurality of rise times using the plurality of sensing signals in response to receiving a signal from the comparator. The rotor-angle estimation circuit may be configured to identify from the plurality of rise times a shortest rise time and a voltage vector corresponding with the shortest rise time and thereby identify the position of the rotor of the PMSM. 1. A system for sensing rotor position of a permanent magnet synchronous motor , comprising:a controller configured to couple with a permanent magnet synchronous motor (PMSM), wherein the controller is configured to apply a plurality of voltage vectors to a PMSM to generate a plurality of sensing signals from a stator of the PMSM in response;a rise time measurement circuit configured to couple to the PMSM, wherein the rise time measurement circuit is configured to calculate a plurality of rise times using the plurality of sensing signals;a memory coupled with the rise time measurement circuit, wherein the memory is configured to store the plurality of rise times; anda rotor-angle estimation circuit coupled with the memory, wherein the rotor-angle estimation circuit is configured to calculate a rotor position relative to the stator of the PMSM through identifying one of a lowest average rise time, a lowest summed rise time, and a lowest weighted summed rise time using the plurality of rise times.2. The system of claim 1 , further comprising an amplifier coupled to the resistor claim 1 , wherein the amplifier is configured to receive ...

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Номер записи: 73
21-06-2018 дата публикации

OPTICAL DRIVING MECHANISM

Номер: US20180175758A1
Автор: CHAN Yi-Liang
Принадлежит:

An optical driving mechanism is provided, disposed in an electronic device, including a movable portion, a fixed portion, and a sensing assembly. The movable portion has a holder configured to sustain an optical element. The fixed portion is affixed in the electronic element and connects to the movable portion, wherein the movable portion is movable relative to the fixed portion by applying a magnetic force. The sensing assembly has a coil and a magnetic element configured to sense the relative positions of the movable portion and the fixed portion. 1. An optical driving mechanism , disposed in an electronic device , comprising:a movable portion, having a holder configured to sustain an optical element;a fixed portion, affixed within the electronic device and connected to the movable portion, wherein the movable portion is movable relative to the fixed portion by applying a magnetic force; anda sensing assembly, having a coil and a magnetic element configured to sense the relative positions of the movable portion and the fixed portion.2. The optical driving mechanism as claimed in claim 1 , wherein an alternating current with a fixed frequency is applied to the sensing assembly to sense the relative positions of the movable portion and the fixed portion.3. The optical driving mechanism as claimed in claim 2 , wherein the relative positions of the movable portion and the fixed portion are sensed by measuring variations in the inductance value of the coil.4. The optical driving mechanism as claimed in claim 1 , wherein the winding direction of the coil is parallel to the magnetic pole direction of the magnetic element.5. The optical driving mechanism as claimed in claim 1 , wherein the sensing assembly is configured to force the movable portion to move relative to the fixed portion.6. The optical driving mechanism as claimed in claim 5 , wherein when a direct current is applied to the sensing assembly claim 5 , the sensing assembly forces the movable portion to move ...

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Номер записи: 74
06-06-2019 дата публикации

MOTOR CONTROL APPARATUS THAT PERFORMS PROCESSING FOR DETECTING STOP POSITION OF ROTOR, AND IMAGE FORMING APPARATUS

Номер: US20190173402A1
Автор: Kameyama Shigeru
Принадлежит:

A motor control apparatus, includes: a voltage control unit configured to control a voltage to apply to a plurality of coils in order to cause a rotor of a motor that includes the plurality of coils to rotate; a holding unit configured to hold information that indicates a magnitude of a load of the motor; and a detection unit configured to, based on the information that indicates the magnitude of the load that is held by the holding unit, set a detection condition for a stop position of the rotor, and perform detection processing of the stop position of the rotor in accordance with the set detection condition. 1. A motor control apparatus , comprising:a voltage control unit configured to control a voltage to apply to a plurality of coils in order to cause a rotor of a motor that includes the plurality of coils to rotate;a holding unit configured to hold information that indicates a magnitude of a load of the motor; anda detection unit configured to, based on the information that indicates the magnitude of the load that is held by the holding unit, set a detection condition for a stop position of the rotor, and perform detection processing of the stop position of the rotor in accordance with the set detection condition.2. The motor control apparatus according to claim 1 , further comprising: a load determination unit configured to claim 1 , based on an excitation current supplied to the plurality of coils when a rotation speed of the rotor is greater than a predetermined speed claim 1 , determine the magnitude of the load of the motor claim 1 , and store information indicating the determined magnitude of the load of the motor in the holding unit.3. The motor control apparatus according to claim 1 , wherein the detection unit is further configured to detect the stop position of the rotor based on a physical quantity for each of excitation phases that are detected in the detection processing by causing the voltage control unit to apply the voltage so that an excitation ...

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Номер записи: 75
07-07-2016 дата публикации

System and method for error correction in angular position sensors

Номер: US20160193941A1
Автор: James E. WALTERS, Ronald J. KREFTA
Принадлежит: Allison Transmission Inc

A system and method for controlling a rotating E-machine and for correcting a rotational position signal output by an angular position sensor operatively connected to the E-machine in conjunction with a sensor digital converter is disclosed. For each angular operating speed of interest, a set of signals as a function of position is taken such that the harmonics (or sub-harmonics) related to the position sensor may be determined and isolated from errors due to an associated digital converter. From this information, the magnitude and phase of the position sensor harmonics is determined. The effects of the sensor digital converter (or other signal processing equipment) are then determined and accounted for, allowing the control system to apply the total position error signal to the position sensor output signal to determine a corrected position sensor signal for use in controlling the E-machine.

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Номер записи: 76
11-06-2020 дата публикации

CONTROL DEVICE FOR ROTATING ELECTRICAL MACHINE

Номер: US20200186070A1
Автор: Kato Sho, KOJIMA Tetsuya
Принадлежит: Mitsubishi Electric Corporation

A control device includes: a current detector that detects rotating electrical machine currents flowing to the rotating electrical machine; a position estimator that estimates a rotor position of the rotating electrical machine based on the rotating electrical machine currents; a controller that calculates drive voltage commands based on the rotating electrical machine currents and information on the rotor position, adds position estimation voltage commands and the drive voltage commands to obtain rotating electrical machine voltage commands. The position estimator extracts position estimation currents included in the rotating electrical machine currents, the position estimation currents being changed according to the position estimation voltage commands, and estimates the rotor position of the rotating electrical machine using a DC component of amplitudes of the position estimation currents extracted, the DC component being not changed according to the rotor position. 1: A control device for a rotating electrical machine , the control device comprising:processing circuitryto detect rotating electrical machine currents flowing to the rotating electrical machine;to estimate a rotor position of the rotating electrical machine based on the rotating electrical machine currents;to calculate drive voltage commands for driving the rotating electrical machine based on the rotating electrical machine currents and information on the rotor position, to add position estimation voltage commands and the drive voltage commands to obtain rotating electrical machine voltage commands, the position estimation voltage commands being issued for phases of the rotating electrical machine for estimating the rotor position, and to output the rotating electrical machine voltage commands; andto apply a voltage to the rotating electrical machine based on the rotating electrical machine voltage commands, whereinthe processing circuitry extracts position estimation currents included in the ...

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Номер записи: 77
29-07-2021 дата публикации

SENSORLESS MOTOR CONTROL FOR A POWER TOOL

Номер: US20210229255A1
Автор: Fieldbinder Douglas R., Huber Alex, Obermann Timothy R.
Принадлежит:

Methods and power tools for sensorless motor control. One embodiment provides a method for automatic control switching for driving a sensorless motor () of a power tool (). The method includes determining, using a motor controller (), a first load point based on user inputs () and determining, using the motor controller (), a first motor control technique corresponding to the first load point. The method also includes driving the motor () based on the first motor control technique. The method further includes determining, using the motor controller (), a change from the first load point to a second load point and determining, using the motor controller (), a second motor control technique corresponding to the second load point. The method includes driving the motor () based on the second motor control technique. 18-. (canceled)9. A power tool comprising;a sensorless motor;an inverter bridge configured to provide operating power to the sensorless motor; and determine a first load point based on a user input,', 'determine a first motor control technique corresponding to the first load point,', 'drive, using the inverter bridge, the sensorless motor based on the first motor control technique,', 'determine a change from the first load point to a second load point;', 'determine a second motor control technique corresponding to the second load point, and', 'drive, using the inverter bridge, the sensorless motor based on the second motor control technique., 'a motor controller coupled to the inverter bridge, the motor controller configured to'}10. The power tool of claim 9 , wherein the first motor control technique is one selected from the group consisting of: block commutation claim 9 , sinusoidal control claim 9 , and field oriented control.11. The power tool of claim 9 , wherein the second motor control technique is one selected from the group consisting of: block commutation claim 9 , sinusoidal control claim 9 , and field oriented control.12. The power tool of claim ...

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Номер записи: 78
27-06-2019 дата публикации

MOTOR CONTROL DEVICE AND MOTOR CONTROL METHOD

Номер: US20190199252A1
Автор: MORITA Yuuki, TSUTSUMI Tomohisa
Принадлежит: FANUC Corporation

A motor control device includes: a polarity sensor configured to detect whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position; a motor control unit configured to turn the synchronous motor from the polarity side detected by the polarity sensor toward an opposite polarity side through the reference position; and a magnetic pole position determination unit configured to determine, as the magnetic pole position, a position of the synchronous motor at the moment when the polarity changes, based on a detection result of the polarity sensor. 1. A motor control device comprising:a polarity sensor configured to detect whether a magnetic pole position in a synchronous motor resides on a positive polarity side or a negative polarity side with reference to a reference position;a motor control unit configured to turn the synchronous motor from the polarity side detected by the polarity sensor toward an opposite polarity side through the reference position; anda magnetic pole position determination unit configured to determine, as the magnetic pole position, a position of the synchronous motor at a moment when a polarity changes, based on a detection result of the polarity sensor.2. The motor control device according to claim 1 , wherein the motor control unit is configured to set a provisional magnetic pole position at the reference position and supply claim 1 , to a stator of the synchronous motor claim 1 , a current having a phase shifted by 90 degrees in terms of electrical angle from the provisional magnetic pole position toward a polarity side opposite to the polarity side detected by the polarity sensor.3. The motor control device according to claim 1 , wherein the motor control unit is configured to set a provisional magnetic pole position at a position that is shifted by 90 degrees in terms of electrical angle from the reference position to the polarity side detected ...

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Номер записи: 79
18-06-2020 дата публикации

Method for Determining the Rotor Position of an Electric Rotating Machine, and an Electric Rotating Machine for Carrying Out a Method of this Kind

Номер: US20200195175A1
Автор: Roetzer Marco, Vollmer Ulrich
Принадлежит:

The disclosure relates to a method for determining a rotor position of an electric rotating machine. The electric machine comprises at least one first, multi-phase subsystem and one second multi-phase subsystem, which each comprise a PWM-controlled inverter for feeding respective winding groups. The winding groups of the at least first and second subsystems are arranged substantially electrically offset from one another by 360°. In the method, voltages predefined by a controller are altered by feeding high-frequency voltages in order to attain high-frequency current changes. The current changes are then detected in that a current curve of phase currents is ascertained for each subsystem by measuring at least one first phase current and one second phase current. The rotor position is then determined depending on the ascertained current curves and the fed high-frequency voltages. The disclosure additionally relates to an electric machine which is designed for carrying out the method. 1. A method for determining a rotor position of an electric rotating machine having at least one first multi-phase subsystem and at least one second multi-phase subsystem , each of the at least one first multi-phase subsystem and the at least one second multi-phase subsystem having a respective winding group and a respective PWM-controlled inverter configured to feed the respective winding group , the respective winding groups of the at least one first multi-phase subsystem and the respective winding groups of the at least one second multi-phase subsystem being arranged offset electrically by essentially 360° to one another , the method comprising:changing predefined voltages of a controller configured to drive the at least one first multi-phase subsystem and the at least one second multi-phase subsystem between a first controller sampling step and a second controller sampling step, in that for each of the at least one first multi-phase subsystem and the at least one second multi-phase ...

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Номер записи: 80
18-06-2020 дата публикации

DEVICE AND METHOD FOR CONTROLLING ROTARY ELECTRIC MACHINE

Номер: US20200195176A1
Автор: Chen Ming-Tsung, HO Min-Hsien, LEE Yu-Ling
Принадлежит:

A control device for controlling a rotary electric machine, the control device includes a current command unit, a voltage conversion device, a current conversion device, a signal demodulation device, an error compensation unit, an adding device and a position estimation device. The current command unit provides a d-axis current command and a q-axis current command. The current conversion device converts a current of the rotary electric machine to a synchronous reference coordinate current. The signal demodulation device computes a current variation of a high-frequency synchronous reference coordinate current. The error compensation device outputs a first correction value. The adding device adds the current variation of the high-frequency synchronous reference coordinate current and the first correction value to generate a second correction value. Based on the second correction value, the position estimation device adjusts a phase estimation value for the current conversion device and the voltage conversion device. 1. A control device for controlling a rotary electric machine , the control device comprising:a current command unit, configured to provide a d-axis current command and a q-axis current command;a voltage conversion device, electrically coupled to the current command unit and the rotary electric machine;a current conversion device, converting a rotary electric machine current passing through the rotary electric machine into a synchronous reference coordinate current;a signal demodulation device, receiving the synchronous reference coordinate current and computing a high-frequency current variation of the synchronous reference coordinate current;an error compensation unit, configured to output a first correction value corresponding to the d-axis current command and the q-axis current command, based on the d-axis current command and the q-axis current command respectively;an adding device, adding the high-frequency current variation of the synchronous ...

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Номер записи: 81
18-06-2020 дата публикации

ROTOR POSITION SENSING SYSTEM FOR PERMANENT MAGNET SYNCHRONOUS MOTORS AND RELATED METHODS

Номер: US20200195179A1
Автор: OKUBAYASHI Masanori
Принадлежит: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Implementations of a system for sensing rotor position of a PMSM may include: a controller which may be coupled with the PMSM. The controller may be configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response. A comparator may be coupled to the PMSM configured to receive and to compare each one of the plurality of sensing signals with a threshold voltage. A rise time measurement circuit may calculate a plurality of rise times using the plurality of sensing signals in response to receiving a signal from the comparator. The rotor-angle estimation circuit may be configured to identify from the plurality of rise times a shortest rise time and a voltage vector corresponding with the shortest rise time and thereby identify the position of the rotor of the PMSM. 1. A system for sensing rotor position of a permanent magnet synchronous motor , comprising:a controller configured to couple with a permanent magnet synchronous motor (PMSM), wherein the controller is configured to apply a plurality of voltage vectors to the PMSM to generate a plurality of sensing signals from a stator of the PMSM in response;a rise time measurement circuit configured to couple to the PMSM, wherein the rise time measurement circuit is configured to calculate a plurality of rise times using the plurality of sensing signals;a memory coupled with the rise time measurement circuit, wherein the memory is configured to store the plurality of rise times; anda rotor-angle estimation circuit coupled with the memory, wherein the rotor-angle estimation circuit is configured to calculate a rotor position relative to the stator of the PMSM using the plurality of rise times.2. The system of claim 1 , further comprising an amplifier coupled to a resistor claim 1 , wherein the amplifier is configured to receive and to amplify the plurality of sensing signals to form a plurality of amplified sensing signals.3. The system of claim 2 ...

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Номер записи: 82
18-06-2020 дата публикации

MOTOR CONTROLLER AND IMAGE FORMING APPARATUS

Номер: US20200195181A1
Автор: Suzuki Daichi, Tachibana Yuta, Yoshikawa Hiroyuki
Принадлежит: KONICA MINOLTA, INC.

A motor controller estimates an initial position of a magnetic pole of a rotor of a brushless DC motor in an inductive sensing scheme. The motor controller controls a drive circuit to apply an AC voltage to a stator winding at a first energization angle, and subsequently to apply an AC voltage to the stator winding at a second energization angle before a residual current flowing through the stator winding returns to zero. At each energization angle, the motor controller corrects a peak value of a current in the stator winding based on the residual current detected immediately before a voltage is applied to the stator winding or at a time when voltage application to the stator winding is started. Based on the corrected peak value, the control circuit estimates the initial position of the magnetic pole of the rotor. 1. A motor controller that controls a brushless DC motor of a sensorless-type , the motor controller comprising:a drive circuit that applies a voltage to each phase of a stator winding of the brushless DC motor;a current detection circuit that detects a current flowing through the stator winding; anda control circuit that controls the drive circuit and estimates an initial position of a magnetic pole of a rotor of the brushless DC motor by causing the drive circuit to continuously or intermittently apply a constant voltage to the stator winding during a prescribed energization time period at each of a plurality of energization angles while sequentially changing the plurality of energization angles,wherein estimating the initial position includes:causing the drive circuit to apply the constant voltage at a first energization angle arbitrarily selected from among the plurality of energization angles and to subsequently apply the constant voltage at a second energization angle, wherein the drive circuit starts voltage application at the second energization angle after the drive circuit ends voltage application at the first energization angle and before a ...

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Номер записи: 83
18-06-2020 дата публикации

MOTOR CONTROL DEVICE AND MOTOR CONTROL SYSTEM

Номер: US20200195187A1
Автор: KIRIBUCHI Takeshi
Принадлежит: Omron Corporation

The present invention improves performance of a motor control device. A slave device () includes: an inverter () configured to drive a motor (); and a control section () configured to control the motor () via the inverter (). The control section () includes: a feedback signal obtaining section configured to obtain a feedback signal indicative of a predetermined physical quantity corresponding to an operating state of the motor (); a communication section () configured to communicate with a PLC (); and a PWM signal output section () configured to supply a motor driving signal to the inverter (). The control section () is implemented by a single IC chip. 1. A motor control device for controlling a motor ,said motor control device comprising:an electric power converting section configured to drive the motor; anda control section configured to control the motor via the electric power converting section, a feedback signal obtaining section configured to obtain a feedback signal indicative of a predetermined physical quantity corresponding to an operating state of the motor;', 'a communication section configured to communicate with a master device, which is a host device with respect to the motor control device; and', 'a motor driving signal output section configured to supply, to the electric power converting section, a motor driving signal for causing the electric power converting section to drive the motor, and, 'the control section includingthe control section being implemented by a single integrated circuit (IC) chip.2. The motor control device as set forth in claim 1 , wherein:the motor includes a position detecting section configured to detect a position of a rotor of the motor;the feedback signal includes a first feedback signal indicative of the position of the rotor of the motor; andthe feedback signal obtaining section includes a first feedback signal obtaining section configured to obtain the first feedback signal from the position detecting section.3. The ...

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Номер записи: 84
09-08-2018 дата публикации

METHOD FOR ESTIMATING THE ANGULAR POSITION OF A ROTOR OF AN ELECTRIC DRIVE SYSTEM

Номер: US20180226906A1
Автор: Chen Keyu, MAKNI Zaatar, Yu Lengfei, Zine Wided
Принадлежит:

The present invention has for object a method for estimating the angular position of a rotor in relation to a stator in a rotary electric machine, such as an electric machine of an electric or hybrid motorisation system, comprising: 1. A method for estimating the angular position of a rotor in relation to a stator of a rotary electric machine , such as an electric machine of an electric or hybrid motorisation system , comprising:{'b': '1', 'estimating the angular position and/or of the rotation speed of the rotor via a method of injecting high frequency signals as long as the absolute value of the rotation speed of the rotor, derived from said angular position, is less than a first predefined threshold (V);'}estimating the angular position and/or of the rotation speed of the rotor via a model coming from a learning method as long as the absolute value of the rotation speed of the rotor, derived from said angular position, is greater than a second predefined threshold.2. The method according to claim 1 , wherein the model comprises a neural network of which the weights and/or internal connections come from the learning method.3. The method according to claim 1 , wherein the method of injecting high frequency signals is a pulsating method.4. The method according to claim 1 , wherein the method of injecting high frequency signals is a rotary method.5. A method for controlling the torque produced by a rotary electric machine claim 1 , in particular with permanent magnets claim 1 , said electric machine comprising a rotor and a stator claim 1 , a physical sensor that measures the angular position and/or the rotation speed of the rotor claim 1 , with said method comprising the controlling of the torque to be produced by the electric machine according to the angular position and/or of the rotation speed of the rotor measured by the physical sensor as long as said physical sensor is available and claim 1 , if said physical sensor is in fault claim 1 , the controlling of the ...

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Номер записи: 85
26-08-2021 дата публикации

Generation of Motor Drive Signals with Misalignment Compensation

Номер: US20210265927A1
Автор: AICHRIEDLER Leo, Hafner Thomas, WRIESSNEGGER Gerald
Принадлежит:

A motor drive circuit provides a drive signal to an electronically commutated motor. A control circuit the motor drive circuit based on calibration data. The calibration data indicate a relationship between an actual angular position of a rotor of the motor in response to the drive signal and an expected angular position of a rotor of an ideal motor in response to the drive signal. 1. A motor controller , comprising: receive a measured angular position of a rotor of an electronically commutated motor,', 'calculate a corrected angular position from the measured angular position based on a relationship indicated by calibration data, and', 'reduce torque ripple due to angle dependent deviations in a magnetic field of the rotor or of a stator of the motor over a full revolution of the motor compared using the calibration data, wherein reducing the torque ripple comprises controlling the motor drive circuit based on the corrected angular position based on the relationship indicated by the calibration data, wherein the calibration data comprises at least three values corresponding to at least three different actual angular positions of the rotor of the motor, each value of the at least three values of the calibration data indicates a relationship between a respective actual angular position of the at least three different actual angular positions and a corresponding expected angular position of the rotor of an ideal motor in response to a drive signal provided to the motor by the motor drive circuit, wherein the at least three different actual angular positions are distributed over the full revolution of the motor, and wherein controlling the motor drive circuit based on the corrected angular position based on the relationship indicated by the calibration data reduces the torque ripple compared to controlling the motor drive circuit without using the corrected angular position based on the relationship indicated by the calibration data., 'a control circuit configured to ...

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Номер записи: 86
01-08-2019 дата публикации

BRAKE CONTROL SYSTEM AND METHOD OF FAULT DETECTION

Номер: US20190238070A1
Автор: Fujii Shouta, Shikagawa Tsutomu
Принадлежит: FANUC Corporation

A brake control system includes: a plurality of motors each provided with a brake device and a position detecting section; and a brake control device that controls a plurality of the brake devices using one brake-oriented power source. The position detecting section includes a position detecting circuit section and a communication circuit section. The brake device includes: a current detecting section that detects a brake current flowing through a brake coil of an electromagnetic brake; and an insulating circuit section that electrically insulates the current detecting section and the communication circuit section. The communication circuit section transmits to the brake control device the brake current acquired via the insulating circuit section. The brake control device includes a fault specifying section that specifies the faulty brake device based on a plurality of detection signals detected by a plurality of the current detecting sections. 1. A brake control system comprising:a plurality of motors each provided with a brake device and a position detecting section; anda brake control device that controls a plurality of the brake devices using one brake-oriented power source,the position detecting section including:a position detecting circuit section that detects a rotational position of a rotating shaft of the motor; anda communication circuit section that transmits the rotational position to the brake control device,the brake device including:an electromagnetic brake that has a brake coil and releases braking of the rotating shaft of the motor by electrification of the brake coil;a detecting section that detects at least one of a brake current flowing through the brake coil and a brake voltage applied to the brake coil; andan insulating circuit section provided between the detecting section and the communication circuit section in order to electrically insulate the detecting section and the communication circuit section and transmit to the brake control device ...

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Номер записи: 87
01-08-2019 дата публикации

POSITION MANAGEMENT APPARATUS AND ASSISTING APPARATUS

Номер: US20190238075A1
Автор: SHIMIZU Satoshi
Принадлежит: FUJI CORPORATION

A position management apparatus includes motors connected to a power supply; a position detecting device connected to the power supply and detecting the rotational position of the motors or the drive position of driving members driven by the motors; position storage devices connected to the power supply and storing the rotational position or the drive position detected by the position detecting devices; and a power cut-off delay circuit for keeping the position detecting devices and the position storage devices connected to the power supply even if the power switch is shut off from a conducting state, and for storing the rotational position or the drive position of the position storage devices after the motor has lost its rotational speed. 16.-. (canceled)7. A position management apparatus , comprising:a motor connected to a power supply via a power switch;a position detecting device which operates by being connected to the power supply and is configured to detect a rotational position of the motor or a drive position of a driving member driven by the motor;a position storage device which operates by being connected to the power supply and is configured to store the rotational position or the drive position detected by the position detecting device; anda power cut-off delay circuit configured to keep the position detecting device and the position storage device connected to the power supply even if the power switch is turned off from a conducting state, and to cut off the position detecting device and the position storage device from the power supply after inertial rotation of the motor has stopped and the position storage device has stored the rotational position or the drive position.8. The position management apparatus of claim 7 , wherein the power cut-off delay circuit further comprises:a first relay configured to keep the position detecting device and the position storage device connected to the power supply even when the power switch is turned off from a ...

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Номер записи: 88
01-08-2019 дата публикации

Driving permanent magnet motor based on neutral point voltage

Номер: US20190238078A1
Автор: Rendong Wang
Принадлежит: Stmicroelectronics Beijing R&d Co ltd

The present disclosure is directed to a permanent magnet motor control method and system. A new structure configuration of a permanent magnet motor has a rotor with two or more permanent magnets attached thereon, a stator wound in a “Y” topology with three coils (windings) arranged at 120 degree among one another, and a neutral point of the wound stator wired in a manner that the voltage at the neutral point may be detected in substantially real time. The detected neutral point voltages are analyzed together with the associated vectors of the excitation current provided to the windings of the stator to determine a speed of the rotor. The determined speed of the rotor is used for vector control.

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Номер записи: 89
23-07-2020 дата публикации

MOTOR CONTROL DEVICE, IMAGE FORMING APPARATUS, AND METHOD FOR ESTIMATING INITIAL POSITION OF MAGNETIC POLE OF ROTOR

Номер: US20200235683A1
Автор: Fujimori Harumitsu, KOBAYASHI Yuji, Suzuki Daichi, Tachibana Yuta, Yoshida Kazumichi, Yoshikawa Hiroyuki
Принадлежит: KONICA MINOLTA, INC.

A control circuit of a motor control device estimates an initial magnetic pole position of a rotor using an inductive sensing scheme. When estimating the initial magnetic pole position, a drive circuit applies a voltage to a stator winding at each of L electrical angles (L≥5) while changing the L electrical angles. An absolute value of an electrical angle difference of the voltage applied to the stator winding between an i-th time (2≤i≤L) and an i−1st time is 180−360/L degrees or more and 180+360/L degrees or less. An absolute value of an electrical angle difference of the voltage applied to the stator winding between a 1st time for initial position estimation and a last time before starting initial position estimation is 180−360/L degrees or more and 180+360/L degrees or less. 1. A motor control device that controls a three-phase motor of a sensorless-type , the motor control device comprising:a drive circuit that applies a voltage to each phase of a stator winding of the three-phase motor; anda control circuit that controls the drive circuit, whereinwhen the control circuit estimates an initial position of a magnetic pole of a rotor of the three-phase motor using an inductive sensing scheme, the control circuit causes the drive circuit to apply a voltage to the stator winding at each of L electrical angles different from one another while changing the L electrical angles, wherein the L is an integer equal to or greater than 5,an absolute value of a difference between an electrical angle of the voltage applied to the stator winding at an i-th time for initial position estimation and an electrical angle of the voltage applied to the stator winding at an i−1st time for the initial position estimation is equal to or greater than 180−360/L degrees and equal to or less than 180+360/L degrees, wherein the i is an integer equal to or greater than 2 and equal to or less than L, andan absolute value of a difference between an electrical angle of the voltage applied to the ...

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Номер записи: 90
20-11-2014 дата публикации

Control device of ac rotating machine

Номер: US20140340018A1
Автор: Masato Ito, Satoru Terashima, Yosuke Hachiya
Принадлежит: Mitsubishi Electric Corp

A control device of an AC rotating machine includes a controller receiving a current vector instruction and a detection current vector as inputs and outputs a voltage vector instruction to the AC rotating machine, an alternating current amplitude computation mechanism computing an alternating current amplitude of at least one of a parallel component and an orthogonal component with respect to the voltage vector instruction, an alternating current amplitude instruction generator generating an alternating current amplitude instruction from the current vector instruction, and a magnetic-pole position computation mechanism computing an estimated magnetic-pole position of the AC rotating machine. The magnetic-pole position computation mechanism computes the estimated magnetic-pole position so that the alternating current amplitude coincides with the alternating current amplitude instruction.

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Номер записи: 91
08-08-2019 дата публикации

Power Tool and Control Method Thereof

Номер: US20190245464A1
Автор: Wang HongWei, Xu Qian
Принадлежит: Nanjing Chervon Industry Co., Ltd.

A power tool and a control method of the power tool are provided. The power tool includes a rotor and a stator having a first phase winding, a second phase winding and a third phase winding; a power supply module configured to power the motor; a drive circuit configured to electrically connecting the power module to at least two of the first phase winding, the second winding, and the third phase winding; a controller configured to control the drive circuit to connect the first phase winding, the second phase winding, and the third phase winding to the power supply module according to a rotational position of the rotor. 1. A power tool , comprising:a motor comprising a rotor and a stator, wherein the stator has a first phase winding, a second phase winding and a third phase winding;a power supply module configured to power the motor;a drive circuit for electrically connecting the power supply module to at least two of the first phase winding, the second phase winding, and the third phase winding;a position detection module for detecting a position of the rotor; anda controller configured to control the drive circuit to connect the first phase winding, the second phase winding, or the third phase winding to the power supply module based on the position of the rotor detected by the position detection module.2. The power tool of claim 1 , whereinthe power supply module comprises a positive terminal and a negative terminal, and generates a potential difference between the positive terminal and the negative terminal;the controller is configured to control the drive circuit to connect the first phase winding to the positive terminal and connect the second phase winding to the negative terminal, and control the drive circuit to connect the third phase winding to the positive terminal when the rotor rotates to a preset rotational position.3. The power tool of claim 1 , whereinthe power supply module comprises a positive terminal and a negative terminal, and generates a ...

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Номер записи: 92
07-10-2021 дата публикации

ELECTRIC MOTOR WITH DIFFERENT STAR POINTS

Номер: US20210313854A1
Автор: SEDLAK Holger
Принадлежит:

An electric motor includes: a rotor with a first number of permanent magnets, wherein each permanent magnet encompasses a first circular sector; a stator with a second number of pole feet, wherein a first group of coils is electrically connected via a first star point, wherein a second group of coils is electrically connected via a second star point to be conductive, wherein the second star point is electrically insulated from the first star point, wherein a coil of the first group of coils is arranged between two coils of the second group of coils; and a controller for applying drive signals to the first group of coils so as to provide the rotor with a torque with respect to the stator, and for applying a control signal that differs from the drive signals to at least one coil of the second group of coils. 1. An electric motor , comprising:a rotor with a first number of permanent magnets, wherein each permanent magnet encompasses a first sector;a stator with a second number of pole feet, wherein a coil is wound around each pole foot of the second number of pole feet, and wherein a pole foot encompasses a second sector that is smaller than the first sector,wherein a first group of coils is electrically connected via a first star point,wherein a second group of coils is electrically connected via a second star point to be conductive,wherein the second star point is electrically insulated from the first star point,wherein a coil of the first group of coils is arranged between two coils of the second group of coils; anda controller for applying drive signals to the first group of coils so as to provide the rotor with a torque with respect to the stator, and for applying a control signal that differs from the drive signals to at least one coil of the second group of coils.2. The electric motor according to claim 1 , wherein the controller is configured to apply the drive signals to the first group of coils in a first internal claim 1 , and to apply drive signals to the ...

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Номер записи: 93
04-12-2014 дата публикации

SWITCHING CONTROLLER FOR ELECTRIC MOTORS AND RELATED METHOD OF CONTROLLING ELECTRIC MOTORS

Номер: US20140354201A1
Автор: Maiocchi Giuseppe
Принадлежит: STMICROELECTRONICS S.R.L.

A switching controller of a poly-phase electric motor may generate, in a fully digital manner, a replica of the phase current and/or of the phase (star) voltage of one or more windings of the motor. The switching controller may use digital signals already available for driving the motor to reconstruct a replica of the phase current or the phase voltage, and thereby avoid the need for dedicated analog components for phase current or phase voltage determination. 110-. (canceled)11. A switching controller for a poly-phase electric motor comprising a plurality of windings and a respective half-bridge stage for driving each of the windings , the windings having respective phase terminals associated therewith , and each half-bridge stage having a respective switch associated therewith , the switching controller comprising:a memory configured to store a current profile for each winding of the motor;a control circuit configured to retrieve current profiles from said memory corresponding to phase currents associated with the phase terminals of the windings of the electric motor; anda digital phase current reconstruction circuit configured to generate a signal representing a phase current of at least one winding of the electric motor;said control circuit being configured to generate at least one digital word of a value of a current profile retrieved from said memory representing a scaled replica of the phase current through the at least one winding;said switching controller comprising a sampling circuit configured to sample the voltage drop on the switch of the respective half-bridge of the at least one winding, said sampling circuit being configured to generate a digital amplitude signal representing a peak value of the phase current of said at least one winding sampled between two consecutive zero-cross events of the phase current when the switch is on;said phase current reconstruction circuit being configured to receive as inputs the digital amplitude signal and the at ...

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Номер записи: 94
15-08-2019 дата публикации

APPARATUS FOR QUASI-SENSORLESS ADAPTIVE CONTROL OF SWITCHED RELUCT ANGE MOTOR DRIVES

Номер: US20190253013A1
Автор: Creary Trevor A., Desai Piyush C., JOHNSTON Mark, Knodel Timothy, KRISHNAMURTHY Mahesh
Принадлежит:

A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter. 1. An apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprising:a switched-reluctance motor (SRM) having a stator and a rotor;a three-phase inverter controlled by a processor connected to an input of the SRM;a load connected to the SRM via an inline torque meter;a converter connected to the load; and a rotor position estimation module to determine an initial position of the rotor utilizing a sequence of relation between phase inductances of the HRSRM;', 'a position estimation module designed to estimate rotor position and to establish a firm time base for the software control module;', 'a time base module to calculate shaft speed.', 'a slope monitoring module to monitor slope of the current waveform in the active phase;', 'a pulse time module to adjust pulse time based on the estimated time base; and', 'a dwell control module to fix a dwell angle and to establish a current band for controlling the dwell angle thereby operating the SRM at a saturation level., 'a software control module at the processor comprising2. The apparatus of wherein the three-phase inverter is adaptable to provide power supply to the SRM.3. The ...

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Номер записи: 95
21-10-2021 дата публикации

Angular Position Error Estimation At Standstill For High-Frequency Voltage Injection

Номер: US20210328532A1
Автор: Ikram Ul Haq Omer
Принадлежит:

According to an aspect, there is provided an apparatus for performing angular position error estimation. The apparatus operates () a synchronous motor () according to a pre-defined pulsating torque signal using a sensorless vector control method with high-frequency voltage injection. The pre-defined pulsating torque signal has a zero mean and corresponds to a torque operating point. The apparatus measures () a first value of an estimated angular position at a first time instance corresponding substantially to an end point of the pre-defined pulsating torque signal and second values of the estimated angular position and an estimated angular speed at a second time instance occurring after the first time instance. Based on the measured values, the apparatus estimates () an error in the estimated angular position and stores () the error to a lookup table. After performing said steps for one or more pre-defined pulsating torque signals, the apparatus operates () the synchronous motor () using the lookup table for angular position error correction. 1. An apparatus comprising: operating the synchronous motor according to a pre-defined pulsating torque signal using a sensorless vector control method with high-frequency voltage injection, wherein a peak amplitude of the pre-defined pulsating torque signal corresponds to a torque operating point of the synchronous motor and the pre-defined pulsating torque signal has a zero mean,', [{'sub': '1', 'sup': 'est', 'a first value of an estimated angular position of a rotor of the synchronous motor, θ, at a first time instance corresponding to an end point of the pre-defined pulsating torque signal,'}, {'sub': '2', 'sup': 'est', 'a second value of the estimated angular position, θ, at a second time instance occurring a pre-defined time, Δt, after the first time instance and'}, {'sub': r', {'sub2': '2'}], 'sup': 'est', 'a second value of an estimated angular speed, ω, at the second time instance,'}], 'measuring, based on a high- ...

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Номер записи: 96
13-09-2018 дата публикации

Apparatus and method for estimating initial position of rotor of motor

Номер: US20180262140A1
Автор: HakJun LEE
Принадлежит: LSIS Co Ltd

An initial position estimating apparatus for estimating an initial position of a rotor of a motor includes: a signal processor for outputting an angular error component from a change amount of a q-axis current in an estimated rotor reference frame; a position estimator for estimating an electrical position of the rotor from the angular error component; a magnetic pole determination portion for outputting magnetic pole determination information according to a sign of a magnetic pole determination signal determined based on a change amount of a d-axis current in the estimated rotor reference frame and based on a d-axis voltage; and a first addition portion for outputting an initial position of the rotor by adding the magnetic pole determination information to the electrical position.

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Номер записи: 97
14-09-2017 дата публикации

APPARATUS AND METHOD FOR CONTROLLING AUTO FOCUS OF CAMERA MODULE

Номер: US20170264813A1
Автор: CHO Taegil, HONG Samnyol, JI Salkmann, KWON Sungdu, KWON Youngman, LEE Jayong, Park Haejin
Принадлежит: LG ELECTRONICS INC.

Disclosed are an apparatus and method for controlling auto focus of a camera module. The present invention includes a lens unit, a moving coil, a fixed coil, and a controller configured to provide a signal comprising first frequency signal and second frequency signal to the moving coil, the fixed coil receiving the variable current or the variable voltage through the second frequency signal, calculate a focus position value based on the received variable current or the variable voltage and an image signal, and control the lens unit to move by applying the first frequency signal to the moving coil according to the calculated focus position value, wherein the controller is further configured to detect a temperature change of the fixed coil and to correct a focus position of the lens unit corresponding to the detected temperature change of the fixed coil. 1. An apparatus for controlling an auto focus of a camera module for correcting focus position , the apparatus comprising:a fixed unit having a perforated hole formed therein;a magnet placed inside the fixed unit;a lens unit including at least one lens and configured to linearly move inside the perforated hole of the fixed unit;a moving coil placed on the lens unit;a fixed coil receiving from the moving coil, a variable current or a variable voltage according to a distance moved by the moving coil;an image signal processing unit processing an image signal sensed by the sensing unit; and provide a signal comprising first frequency signal and second frequency signal to the moving coil, wherein the fixed coil receiving the variable current or the variable voltage through the second frequency signal;', 'calculate a focus position value based on the received variable current or the variable voltage according to a distance moved by the moving coil from the fixed coil and the image signal processed by the image signal processing unit, and', 'control the lens unit to move by applying the first frequency signal to the moving ...

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Номер записи: 98
22-08-2019 дата публикации

CONTROL DEVICE

Номер: US20190260318A1
Автор: ONO Yutaka, YAMASAKI Reiji
Принадлежит:

In a sensorless control of a motor, due to the characteristic of a response frequency, an induced voltage, a magnetic pole position estimation gain, a current control gain, and a speed control gain are closely related. An object of the invention is to enable the induced voltage and the frequency characteristic of a magnetic pole position estimation system to be clearly designed and to theoretically and quantitatively design all of the control gains necessary for the sensorless control so as to solve a problem that a method of designing those parameters cannot be established and the parameters have to be adjusted in a try and error manner. A control device has an estimator estimating an estimation induced voltage and a phase error of a motor by applying an induced-voltage observer and a controller controlling the motor on the basis of the estimation induced voltage and the phase error. 1. A control device , comprising:an estimator estimating an estimation induced voltage and a phase error of a motor by applying an induced-voltage observer, anda controller controlling the motor on the basis of the estimation induced voltage and the phase error,wherein the estimator comprises the induced-voltage observer, an induced-voltage computing unit and a phase computing unit,wherein the induced-voltage computing unit dividing the estimation induced voltage by an induced-voltage coefficient, andwherein the phase computing unit performs integration by multiplying the phase error with an error angle integration gain.2. The control device according to claim 1 ,wherein the estimator comprises a first subtractor,wherein the first subtractor obtains the magnetic pole position estimation value by subtracting a computation result of the phase computing unit from a computation result of the induced-voltage computing unit.3. The control device according to claim 2 ,wherein the induced-voltage observer estimates the estimation induced voltage and the phase error of the motor on the basis of ...

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Номер записи: 99
29-08-2019 дата публикации

Method for monitoring the operation of an electrical rotating machine

Номер: US20190267923A1
Автор: Peter Anders, Stefan Hain
Принадлежит: SIEMENS AG

An electrical rotating machine includes a machine housing accommodating a rotor, and a stator. In order to allow the method to be carried out without structural changes to the electrical rotating machine a first physical value of the stator and a second physical value of the rotor are measured outside the machine housing, and a state variable of the electrical rotating machine is determined from the first physical value and the second physical value. The state variable, or alternatively the first and second physical value, are sent to a cloud, in particular wirelessly or by hardwired or optical means.

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Номер записи: 100