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公开(公告)号：US20240178773A1
公开(公告)日：2024-05-30
申请号：US18430178
申请日：2024-02-01
Applicant: Schlumberger Technology Corporation
Inventor： Jian Wu , Ramakrishna Madhireddy , Nathaniel Wicks
Abstract: A motor controller to control rotational speed of an output shaft of an electric motor. The motor controller includes a proportional controller and a time-optimal controller. The proportional controller controls the rotational speed when a present rotational position of the shaft is between a target rotational position and a switching point, inclusively. The time-optimal controller controls the rotational speed when the present rotational position is not between the target rotational position and the switching point. Also introduced herein are aspects pertaining to determining the switching point in a manner that minimizes overshooting the target rotational position while maximizing expediency at which the target rotational position is reached.
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公开(公告)号：US11876476B2
公开(公告)日：2024-01-16
申请号：US17605173
申请日：2020-04-22
Applicant: PIAGGIO & C. S.P.A.
Inventor： Jury Cantini , Luca Carmignani
CPC classification number: H02P6/17 , H02P6/08 , H02P6/18 , B60L2200/12 , B62K11/00 , H02P2203/03
Abstract: A control system for an electrically-actuated, rideable saddle vehicle including an electric traction motor and a vehicle control system having two different speed acquisition systems. A first speed system includes a position sensor and controls power to the motor on a basis of a control signal, which is characteristic of torque selectively required by the electric motor. A second speed system includes Logic circuitry for estimating vehicle speed from estimated variations of a counter-electromotive force generated in the stator winding as a result of the rotor movement of the motor. The two systems allow optimizing control of the motor from both speed systems, or from that considered more reliable in a given operating condition, during operation of the vehicle. Illustratively, for low speeds, speed control may be based on sensor signals in the first speed system, while high speeds control may be based on the estimates from the logic system.
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公开(公告)号：US20230163709A1
公开(公告)日：2023-05-25
申请号：US17917829
申请日：2021-04-08
Applicant: Turntide Technologies Inc.
Inventor： Jacob Bayless , Nicholas Nagel
IPC: H02P25/089 , H02P25/098 , H02P6/18
CPC classification number: H02P25/089 , H02P25/098 , H02P6/18 , H02P2203/01
Abstract: A method and an apparatus for sensorless profiling of a current waveform in a switched-reluctance motor (SRM) is disclosed. The apparatus comprises a switched-reluctance motor having at least one stator pole and at least one rotor pole, a phase inverter controlled by a processor, a load, a converter and a software control module at the processor. The current waveform sets a target magnitude for a programmable dwell angle that scales a programmable waveform shape. 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 method reduces the overall radial force magnitude by compensating nonlinear torque production thereby reducing the acoustic noise reduction and torque ripple which results in computational efficiency of the SRM.
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4.发明申请公开(公告)号：US20180323736A1
公开(公告)日：2018-11-08
申请号：US15967670
申请日：2018-05-01
Applicant: LG Electronics Inc.
Inventor： Jongseong JI , Wontae KIM
CPC classification number: H02P7/2913 , F04D25/06 , F04D27/004 , F24C15/20 , H02P6/18 , H02P21/00 , H02P21/24 , H02P2205/01
Abstract: A method for controlling a brushless direct current (BLDC) motor is disclosed. The method includes: receiving a constant current; comparing the constant current to a reference current; based on the comparison revealing that the constant current is smaller than the reference current, providing a first speed command to the rotational speed control unit to increase a speed of the BLDC motor; based on the comparison revealing that the constant current is larger than the reference current, providing a second speed command to the rotational speed control unit to decrease a speed of the BLDC motor; based on the comparison revealing that the constant current is the same as the reference current, providing a third speed command to the rotational speed control unit to maintain a speed of the BLDC motor; and controlling, by the rotational speed control unit, a speed of the BLDC motor.
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公开(公告)号：US20180262134A1
公开(公告)日：2018-09-13
申请号：US15573840
申请日：2015-12-28
Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY
Abstract: A switched reluctance motor modeling method, which is applicable to switched reluctance motors of various phase numbers. A variable resistor (RMp) formed by four operational amplifiers (U1, U2, U3, U4), three current conveyors (U5, U6, U7), a digital potentiometer and a digital controller, eight resistors (R1, R2, R3, R4, R5, Ro, Rx, Rs) and a capacitor (C) are adopted to form a switched reluctance motor phase winding equivalent model. The modeling method is simple, can realize system mathematic direct simulation for switched reluctance motors, and is capable of simulating and controlling in real time.
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Patent Agency Ranking
公开(公告)号：US10063178B2
公开(公告)日：2018-08-28
申请号：US15496674
申请日：2017-04-25
Applicant: HYUNDAI MOBIS CO., LTD.
Inventor： Jae Hyun Lee
IPC: G05B19/408 , H02P25/03 , B62D5/04
CPC classification number: H02P25/03 , B62D5/04 , B62D5/0463 , H02P6/16 , H02P6/18 , H02P2203/03 , H02P2203/05
Abstract: 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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公开(公告)号：US10008966B2
公开(公告)日：2018-06-26
申请号：US13410623
申请日：2012-03-02
CPC classification number: H02P21/13 , H02P6/16 , H02P6/18 , H02P6/182 , H02P21/0007 , H02P21/18 , H02P23/12
Abstract: At least one example embodiment discloses a method of estimating a position of a rotor in a motor. The method includes determining a first estimated position of the rotor using a first algorithm, determining a second estimated position of the rotor using a second algorithm, the second algorithm being different than the first algorithm, determining a first error based on the first estimated position and the second estimated position, and determining a third estimated position of the rotor based on the first error.
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公开(公告)号：US20180159450A1
公开(公告)日：2018-06-07
申请号：US15831776
申请日：2017-12-05
Applicant: Minebea Mitsumi Inc.
Inventor： Masato Aoki , Hiroyuki Kaidu , Youhei Serizawa
Abstract: A motor drive controller includes: a motor drive unit; and a lock energization control circuit configured to control the motor drive unit to cause a lock current for holding the rotor at a predetermined lock position to flow from the motor drive unit to the drive coils for lock energization duration before rotation of the motor is started. The lock energization control circuit includes: a first lock energization unit that controls the motor drive unit such that a magnitude of the lock current becomes a first predetermined value when first predetermined duration has elapsed after the lock energization duration is started; and a second lock energization unit that controls the motor drive unit such that the magnitude of the lock current becomes a second predetermined value smaller than the first predetermined value when the lock energization duration is terminated after the first predetermined duration has elapsed.
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公开(公告)号：US09923497B2
公开(公告)日：2018-03-20
申请号：US15088096
申请日：2016-03-31
Applicant: Johnson Controls Technology Company
Inventor： Zhiqiao Wu , Ivan Jadric
CPC classification number: H02P6/181 , H02P1/52 , H02P6/18 , H02P6/185 , H02P21/141 , H02P23/14 , H02P25/024 , H02P25/03
Abstract: A chiller system includes a compressor configured to circulate a refrigerant between an evaporator and a condenser in a closed refrigerant loop and a synchronous motor configured to drive the compressor. The motor includes a stator winding and a rotor. The chiller system includes a controller configured to estimate a flux linkage of the rotor and generate a control signal for the motor based on the estimated flux linkage. Estimating the flux linkage includes applying a voltage of the stator winding to a transfer function having an error correction variable, using a first value of the error correction variable in the transfer function to obtain convergence of the flux linkage over an initial motor starting interval, and using a second value of the error correction variable after the initial motor starting interval to reduce an error in estimating the flux linkage.
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公开(公告)号：US20170313198A1
公开(公告)日：2017-11-02
申请号：US15495266
申请日：2017-04-24
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Kenji Yamada , Toshihiro Yamamoto , Masashi Mizuno
CPC classification number: B60L11/1803 , B60L3/003 , B60L11/123 , B60L11/14 , B60L2210/40 , B60L2220/14 , B60L2240/421 , B60L2240/423 , B60L2240/527 , B60L2240/529 , B60L2260/165 , H02P6/085 , H02P6/18 , Y02T10/7258
Abstract: A vehicle includes an electronic control unit. The electronic control unit is configured to perform control of an inverter by switching a plurality of controls including i) first PWM control of generating a first PWM signal of a plurality of switching elements by comparison of voltage commands of respective phases based on a torque command of a motor with a carrier voltage and switching the plurality of switching elements, and ii) second PWM control of generating a second PWM signal of the plurality of switching elements based on a modulation factor of a voltage and a voltage phase based on the torque command and the number of pulses in a predetermined period of an electrical angle of the motor and switching the plurality of switching elements. The electronic control unit is configured to limit execution of the second PWM control when an abnormality occurs in the rotational position sensor.
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