Vector Control (e.g., Dq-axis Control, 3-2 Phase Conversion, Etc.) Patents (Class 318/400.02)
  • Patent number: 10848089
    Abstract: An abnormality diagnostic unit of a motor drive device has an inverter that supplies AC power to an electric motor, and a current measuring means for measuring a DC bus current of the inverter, calculates an estimated upper q-axis current limit and an estimated lower q-axis current limit based on a diagnostic q-axis voltage command value obtained by subjecting a q-axis voltage command value to an absolute value process. The abnormality diagnostic unit calculates a diagnostic q-axis current measurement based on: a q-axis current measurement calculated based on an output of the current measuring means; and sign information of the q-axis voltage command value. Then, the abnormality diagnostic unit determines whether the current measuring means is abnormal based on duration of deviation of the diagnostic q-axis current measurement from a normal range defined by the estimated upper q-axis current limit and the estimated lower q-axis current limit.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: November 24, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Masaki Hano
  • Patent number: 10826425
    Abstract: The vehicle includes an AC motor generator (MG) connected to a driving wheel, a battery, an inverter configured to convert DC power supplied from the battery to AC power and supply the AC power to the MG, and a vehicle ECU configured to control the inverter. The vehicle ECU performs a zero torque control to drive the inverter so that the output torque from the MG is zero when the battery is prohibited from being charged while the MG is being driven to rotate by the motive power from the driving wheel.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: November 3, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihiro Sonoda, Ryota Arakawa, Masashi Yoshimi, Hiroki Tashiro
  • Patent number: 10812002
    Abstract: A control system for an electric motor circuit comprises a current controller which produces a set of idealised voltage demands for the motor circuit, an observer which observes the inputs to the motor circuit and the outputs of the motor circuit and which generates from the observations estimates of the voltage disturbances within the motor circuit, the observer being arranged in use to output a first correction signal indicative of the voltage disturbances in the motor circuit, a feed-forward controller which receives as an input a measurement or estimate of the current flowing in the motor and calculates from the input a second correction signal. The first correction signal output from the observer and the second correction signal output from the feedforward controller are combined with the idealised voltage demands output from the controller to provide a set of modified voltages demands that are fed to the motor.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: October 20, 2020
    Assignee: ZF Automotive Germany GmbH
    Inventor: Robert Gonschorek
  • Patent number: 10800444
    Abstract: Disclosed is an electric driving device in which: two positive-electrode-side power lines (32, 33) are arranged from an outer peripheral side to an inner side of a mounting substrate (19); power conversion circuits (36, 37; 44, 45; 46, 47) are arranged on both sides of the mounting substrate, with respect to the positive-electrode-side power lines, to perform drive control of an electric motor; and output terminals (52, 53) are arranged on the mounting substrate at a location outward of the power conversion circuit so as to establish a connection to the electric motor. As the power conversion circuits are disposed from the center to the periphery of the mounting substrate, it is possible to decrease the wiring length and circuit mounting area of the mounting substrate (19) and suppress a radial size increase of the mounting substrate on which the redundant power conversion circuits are mounted.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: October 13, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomishige Yatsugi, Toshihiko Sakai
  • Patent number: 10790767
    Abstract: A control device of a permanent magnet synchronous motor that is a control device of a sensorless-type permanent magnet synchronous motor in which a rotor using a permanent magnet rotates by a rotating magnetic field caused by a current flowing in an armature includes: a driver that applies a voltage to the armature and drives the rotor; an initial position estimator that estimates an initial position which is a magnetic pole position of the rotor that is stopped; and a controller that controls the driver so as to apply a pulse train including a voltage pulse for searching the initial position for each of n angle positions dividing a search range of an electrical angle of 360 degrees to the armature, wherein the pulse train includes a first pulse and a second pulse.
    Type: Grant
    Filed: May 2, 2019
    Date of Patent: September 29, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Hiroyuki Yoshikawa, Daichi Suzuki, Yuta Tachibana
  • Patent number: 10784804
    Abstract: A magnetization state control method for a variable magnetization machine, the method includes generating a flux linkage vector while changing a magnetization state of the variable magnetization machine such that a trajectory of the flux linkage vector has a curved clockwise trajectory on a dq-axis plane and a magnitude of the flux linkage vector temporally changes, with the dq-axis plane being a synchronous reference frame with a d-axis pointing in a direction of a permanent magnet flux and a q-axis being 90 degrees ahead of the d-axis in a rotational direction of a rotor.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: September 22, 2020
    Assignees: Nissan Motor Co., Ltd., Wisconsin Alumni Research Foundation
    Inventors: Kensuke Sasaki, Takashi Fukushige, Takashi Katou, Brent S. Gagas, Robert D. Lorenz
  • Patent number: 10770998
    Abstract: A control apparatus for is a rotating electric machine applied to a control system including a power conversion circuit, a rotating electric machine, and a capacitor. The control apparatus selects two types of active voltage vectors that sandwich a command voltage vector that is applied to a rotating electric machine from a power conversion circuit and have a phase difference of 60 degrees therebetween. The control apparatus selects, of two types of active voltage vectors that sandwich the command voltage vector and have a phase difference of 120 degrees therebetween, one of two types of active voltage vectors that differs from the two types of active voltage vectors selected earlier, based on a driving state of the rotating electric machine. The control apparatus controls the power conversion apparatus to perform switching operations to control the rotating electric machine, based on the selected three types of active voltage vectors.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: September 8, 2020
    Assignee: DENSO CORPORATION
    Inventors: Yasuaki Aoki, Shinji Makita
  • Patent number: 10763769
    Abstract: A controller for a power convertor includes: a torque command value calculation module to calculate a first torque command value to a power convertor; a torque command limit module to receive the first torque command value and generate a second torque command value obtained by correcting the first torque command value so that the first torque command value is limited to a torque limiter range. The torque command limit module sets a width between the upper limit torque value and the lower limit torque value of the torque limiter range to be smaller as a fundamental wave output frequency of the power convertor increases at least in a speed region equal to or higher than a field weakening starting point.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: September 1, 2020
    Assignees: Wisconsin Alumni Research Foundation, Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Yang Xu, Chikara Morito, Robert D. Lorenz
  • Patent number: 10744848
    Abstract: An actuator system which may incorporate a motor, a motor controller connected to the motor, a processor connected to the motor controller, and a switch connected to the processor for engaging the motor to open and close an actuator shaft. The switch may have a position which is a test mode. Selecting the position of test mode may cause the motor to move the actuator shaft to a certain position to verify operation of the actuator shaft. The actuator shaft may stay in the certain position while the switch is in a position of test mode. The system may also incorporate a spring attached to the actuator shaft. If power fails to the motor, then the actuator spring or another mechanism may return the actuator shaft to a fail safe position. The test mode may alternatively be selected at a controller via the communications bus to the processor.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: August 18, 2020
    Assignee: Honeywell International Inc.
    Inventors: Daniel Waseen, Bruce S. Johnson, Larry Weber, Paul Wacker
  • Patent number: 10723294
    Abstract: A vehicle includes a controller programmed to, responsive to injecting a high frequency voltage signal to an electric machine, determine an estimated negative sequence current phase associated with an electric machine current, and responsive to a rotor of the electric machine being at a predetermined rotor position, inject a pulse torque command to the electric machine and observe a speed change of the electric machine to determine a cable sequence.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: July 28, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Silong Li, Wei Xu, Jiyao Wang, Michael W. Degner
  • Patent number: 10715029
    Abstract: A generator system can include a generator configured to produce an output of alternating current (AC), a rectifier connected to the generator to rectify the AC into direct current (DC) rectifier output, an inverter connected to the rectifier to receive the DC rectifier output and configured to output three phase AC inverter output, and a plurality of output lines connected to the inverter to receive the three phase AC inverter output. The system can include a control module configured to control the output of the inverter. The control module can be operatively connected to one or more of the output lines via one or more local sense leads to receive a local feedback. The control module can be configured to control the inverter as a function of the local feedback to provide one or more of protection and/or voltage regulation.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: July 14, 2020
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Randall Bax, Dwight D. Schmitt
  • Patent number: 10715069
    Abstract: A discharge control device performs discharging of a capacitor, in a state in which a battery is not connected to an inverter that drives a motor, by causing electric charges accumulated in the capacitor connected to the inverter to be consumed by windings of the motor. The discharge control device performs the discharging of the capacitor by sequentially generating command values for voltages applied to a ? axis and a ? axis while causing a voltage phase in an ?? stationary coordinate system having a rotation axis of a rotor of the motor as an origin and defined by the ? axis and the ? axis orthogonal to each other to be inverted in a predefined period.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: July 14, 2020
    Assignee: KEIHIN CORPORATION
    Inventor: Nobukatsu Yamaguchi
  • Patent number: 10707793
    Abstract: A method for operating a synchronous machine having a rotor, comprising the following features: the synchronous machine is modelled, with respect to the rotor, as a two-phase system with a direct-axis current and a quadrature-axis current, rotor losses of the synchronous machine, which rotor losses occur in the rotor, are numerically described by an evaluation function of the first direct-axis current, of the quadrature-axis current and of a specified rotation speed of the synchronous machine, and, on the basis of the evaluation function, the direct-axis current and the second quadrature-axis current are controlled for the specified rotation speed and a required torque in such a way that the synchronous machine outputs the required torque and the rotor losses are low and a corresponding synchronous machine, a corresponding computer program and a corresponding storage medium.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: July 7, 2020
    Assignee: Dr. Ing. h.c. F. Porsche Aktiengesellschaft
    Inventors: Jan Nägelkrämer, Axel Heitmann, Thomas Hubert, Sven Luthardt, Stefan Schmitz
  • Patent number: 10680544
    Abstract: In order to achieve a power conversion device with which a motor can be stably driven, a power conversion device is provided with: an inverter, which converts supplied DC voltage to an AC output voltage and supplies the AC output voltage to windings, and which, in accordance with the DC voltage, changes the saturation level at which the output voltage is saturated, in order to drive a motor equipped with a stator having the windings and a rotor having permanent magnets; and a controller which, when the output voltage is lower than the saturation level, increases the output current of the inverter such that a magnetic flux that weakens or strengthens the magnetic flux generated by the permanent magnets is generated in the windings. An air conditioner including the power conversion device is also disclosed.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: June 9, 2020
    Assignee: Hitachi-Johnson Controls Air Conditioning, Inc.
    Inventors: Ken Kishita, Dongsheng Li, Rei Kasahara
  • Patent number: 10673365
    Abstract: A motor vector control method and device, and an aircraft are provided. The method includes: receiving a Pulse Position Modulation (PPM) signal; acquiring a first given voltage signal of a motor according to the PPM signal; adopting a control manner of giving a d-axis current 0, to acquire a d-axis voltage of the motor; and calculating a q-axis voltage of the motor at the next moment according to the first given voltage signal and the d-axis voltage of the motor, and performing vector control on the motor according to the d-axis voltage of the motor and the q-axis voltage of the motor at the next moment.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: June 2, 2020
    Assignee: GUANGZHOU XAIRCRAFT TECHNOLOGY CO., LTD
    Inventor: Jiangtao Yu
  • Patent number: 10666176
    Abstract: A motor drive system includes: a flywheel; a servomotor for buffer which includes a plurality of independent windings and allows the flywheel to rotate; a plurality of inverters for buffer respectively connected to the windings; a plurality of converters respectively connected to the DC links; inverters for drive which perform power conversion between a DC power in the DC links and an AC power which is a drive power or a regenerative power of the servomotor for drive; and a motor control unit for buffer configured to control driving of the servomotor for buffer by controlling power conversion of the respective inverters for buffer respectively connected to the windings.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: May 26, 2020
    Assignee: FANUC CORPORATION
    Inventors: Shougo Shinoda, Satoshi Ikai
  • Patent number: 10644621
    Abstract: A rotating electric machine apparatus includes a rotating electric machine and a full-bridge inverter. The full-bridge inverter includes first high-side switches, first low-side switches, second high-side switches, and second low-side switches. The rotating electric machine apparatus includes: first and second neutral point switches; a full-wave driving unit that performs a full-wave driving process in which switching control of the switches is performed in a state in which the first and second neutral point switches are turned off; a half-wave driving unit that performs a half-wave driving process in which switching control of the first high-side switches and the second low-side switches is performed in a state in which the first and second neutral point switches are turned on, and the first low-side switches and the second high-side switches are turned off; and an executing unit that selects and performs either of the full-wave driving process and the half-wave driving process.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: May 5, 2020
    Assignee: DENSO CORPORATION
    Inventors: Asaka Kimura, Makoto Taniguchi, Keiji Kondo
  • Patent number: 10630181
    Abstract: The present disclosure provides a semiconductor chip power supply system, including: a semiconductor chip including: a first data processing function area and a first power converter control area, the first data processing function area and the first power converter control area being formed on a first semiconductor substrate of the semiconductor chip; and a first power converter power stage located outside the first semiconductor substrate and electrically connected to the first power converter control area and the first data processing function area; wherein the first power converter control area controls the first power converter power stage to supply power to the first data processing function area.
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: April 21, 2020
    Assignee: Delta Electronics (Shanghai) CO., LTD
    Inventors: Jianhong Zeng, Haoyi Ye, Xiaoni Xin, Siyu He, Xinjian Zou
  • Patent number: 10615730
    Abstract: 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.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: April 7, 2020
    Assignee: Software Motor Company
    Inventors: Mahesh Krishnamurthy, Trevor Creary
  • Patent number: 10608566
    Abstract: A control apparatus for a rotary electric machine includes at least one of a first corrector and a second corrector. The first corrector corrects a first command voltage as a function of a deviation between a command value for a field current and an actual value of the field current. The second corrector corrects a second command voltage as a function of a deviation between a command value for a d-axis component of an armature current and an actual value of the d-axis component of the armature current. At least one of the first corrector and the second corrector makes the d-axis component of the armature current and the field current non-interfere with each other.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: March 31, 2020
    Assignee: DENSO CORPORATION
    Inventors: Jun Ishida, Hideaki Nakayama
  • Patent number: 10601354
    Abstract: The present invention relates to a method and apparatus for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed. The method (100) for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed comprises: injecting a high-frequency pulsating voltage signal; acquiring a d-axis high-frequency current signal responding to the high-frequency pulsating voltage signal; and estimating an initial position of the surface permanent magnet electric machine on the basis of a second harmonic of the d-axis high-frequency current signal.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: March 24, 2020
    Assignee: Robert Bosch GmbH
    Inventors: Yongle Mao, Wei Zhang, Xiaoyun Zang
  • Patent number: 10594240
    Abstract: In a MG control device, a standard voltage calculation part calculates a d axis standard voltage and a q axis standard voltage in a standard state in which no demagnetization occurs in permanent magnets of a MG. A magnetic flux change amount estimation value calculation part calculates a basic magnetic flux change amount estimation value based on a deviation of a specific value from the q-axis standard voltage. This specific value is obtained by multiplying q axis real voltage with a ratio of the d axis standard voltage and the d axis real voltage. A magnetic flux change amount estimation value correction part adjusts a magnetic flux change amount estimation value by correcting the basic magnetic flux change amount estimation value relatively to a detection threshold value based on characteristic change of the MG in a demagnetization state of the permanent magnets of the MG.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: March 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takashi Ogawa, Masaki Nishiyama, Mitsuharu Matsuno
  • Patent number: 10594242
    Abstract: A controller for a motor determines a voltage limit circle based on a velocity of the motor, a DC bus voltage of an inverter, calculates a q axis current limit value based on the voltage limit circle and a predetermined current limit circle, determines, as a q axis current command value, a value obtained through a limit process which is applied using the q axis current limit value to a q axis current value calculated in accordance with a torque command value, and determines a corresponding d axis current value based on the q axis current command value.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: March 17, 2020
    Assignee: OKUMA CORPORATION
    Inventor: Satoshi Eguchi
  • Patent number: 10581367
    Abstract: The rotating-electric-machine control apparatus is provided with two or more torque compensation amount maps that each store a torque compensation amount corresponding to a detection rotation speed and a first torque command and a torque compensation amount map selector that selects a single torque compensation amount map from the two or more torque compensation amount maps, based on at least one of the detection rotation speed and control information indicating a control method utilized by the voltage applying device.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: March 3, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hirofumi Fujii, Kotaro Nakano, Daiki Matsuura, Noriyuki Wada, Yoshihiko Kimpara
  • Patent number: 10574161
    Abstract: A system and computer-implemented method for reducing an angle error in an estimated position of a rotor over various loads on an electric motor or type of electric motor. Electrical parameters of an electric motor are measured, a true rotor position is found, and sensorless gains based on the measured parameters are generated, including determining a sensorless angle. Data is gathered at multiple torque levels for at least one speed of the motor, including for each torque level, trying different inductance values, and determining an inductance value that results in an angle error of zero. The angle error is the difference between the true rotor position and the sensorless angle. The inductance value that results in an angle error of zero for each speed may be saved in an electronic memory and used to better control the motor or other motors of the same type.
    Type: Grant
    Filed: September 21, 2018
    Date of Patent: February 25, 2020
    Assignee: Nidec Motor Corporation
    Inventors: Bret S. Clark, Christopher D. Schock, Michael I. Henderson
  • Patent number: 10574164
    Abstract: The invention proposes a fault-tolerant field-oriented control method of five-phase interior permanent-magnet fault-tolerant linear motor (IPM-FTLM) with two nonadjacent short-circuit phase faults. Firstly, the extended Clark transformation matrix can be obtained according to the principle that magnetic motive force (MMF) keeps constant before and after the two-phase open-circuit faults, the constraint that the sum of healthy phase currents is zero and the adjacent two-phase current amplitude is equal. The back electric motive force (EMF) can be estimated by the transposed matrix. The nonlinear strong coupling system becomes the first-order inertia system when using the internal mode controller, the first-order inertia feed-forward voltage compensator and back-EMF observer, as the motor is with fault.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: February 25, 2020
    Assignee: Jiangsu University
    Inventors: Huawei Zhou, Guohai Liu, Jinghua Ji, Wenxiang Zhao, Qian Chen, Long Chen
  • Patent number: 10574170
    Abstract: The invention relates to a method for switching off a multi-phase electric machine (110) in a motor vehicle, the multi-phase electric machine (110) comprising a rotor having a rotor winding (101) and a stator having a multi-phase stator winding (110a), wherein in a block mode (210) of the electric machine (110) a parameter influencing a synchronous generated voltage vector (Up) of a synchronous generated voltage is adjusted such that the synchronous generated voltage reaches a first threshold value (S1), wherein the block mode (210) is deactivated when the first threshold value (S1) is reached and a PWM mode (220) for applying a phase voltage with a phase voltage vector (Us) is activated, wherein the phase voltage vector (Us) and the synchronous generated voltage vector (Up) are varied in PWM mode (220) until the parameter influencing the synchronous generated voltage reaches a further threshold value (S2), wherein the phase voltage is switched off when the further threshold value (S2) is reached.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: February 25, 2020
    Assignee: SEG AUTOMOTIVE GERMANY GMBH
    Inventor: Julian Roesner
  • Patent number: 10549772
    Abstract: A vector control type electric power steering apparatus that compensates a dead time of an inverter, a motor back-EMF and an interference voltage by means of a mutual inductance between motor windings, improves a distortion of a current waveform and a responsibility of a current control, and suppresses a noisy sound, vibration and a ripple. The apparatus driving-controls a three-phase brushless motor which applies an assist torque to a steering mechanism of a vehicle by using a current command value calculated based on at least a steering torque, and vector-controls the three-phase brushless motor by using dq-axis command values that are converted from the current command value via an inverter, including: a 3-phase disturbance observer to compensate respective phase disturbance voltages, which include a dead time of the inverter, for 3-phase voltage command values.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: February 4, 2020
    Assignee: NSK LTD.
    Inventors: Ryo Minaki, Hiroaki Takase, Hideki Sawada, Takayoshi Sugawara
  • Patent number: 10549773
    Abstract: A method of operating an electric power steering system installed on a vehicle. The electric power steering system includes a controller that receives a desired assist torque value and supplies a pulse-width modulation duty cycle to an electric motor. The method includes the step of controlling the electric motor to achieve a nominal value of power steering assist torque when the electrical power available to the motor is sufficient to achieve the nominal value of power steering assist torque. The method further includes the step of controlling the electric motor to achieve a reduced value of power steering assist torque less than the nominal value when the electrical power available to the motor is not sufficient to achieve the nominal value of power steering assist torque.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: February 4, 2020
    Assignee: GM Global Technology Operations, LLC
    Inventors: Wen-Chiao Lin, Xinyu Du, Yat-chung Tang
  • Patent number: 10547265
    Abstract: Provided is a motor control system. The motor control system include an inverter connected to a DC link, including both ends which a DC link voltage value is applied across, and including switch groups connected in parallel and applying a three-phase current to a motor according to a switching operation, based on PWM control, of each of the switch groups, a current converter converting voltage values, applied across both ends of shunt resistors included in the switch groups, into DC current values according to an ADC gain, an adder estimating a current value, obtained by summating the DC current values, as a DC link current value, and a PI control unit outputting a voltage value for controlling a field current of the motor to the motor by using the estimated DC link current value according to a PI control method, for controlling a generated power of the DC link.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: January 28, 2020
    Assignee: Hyundai Mobis Co., Ltd.
    Inventor: Sang Min Kim
  • Patent number: 10526008
    Abstract: Technical solutions are described for applying machine current limiting in permanent magnet synchronous motors. An example system includes a PMSM and a motor control system. The motor control system is configured to receive a torque command and determine whether the torque command can be satisfied based on a given voltage and a given maximum motor current limit. The motor control system is further configured to, responsive to determining that the torque command can be satisfied, determine a minimum current that satisfies the torque command. The motor control system is further configured to send the minimum current as a minimum current command to the PMSM.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: January 7, 2020
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Haibo Li, Prerit Pramod
  • Patent number: 10530281
    Abstract: An oil-pump motor drive apparatus includes a current detection unit for detecting each of multi-phase currents flowing through coils of a stator, a control unit for converting the detected multi-phase currents into a d-axis current Id and a q-axis current Iq, calculating a phase error between an actual rotational position of the rotor and an imaginary rotational position by comparing the d-axis current Id with a d-axis current command value Idref and comparing the q-axis current Iq with the d-axis current command value Idref, performing control so that the phase error gets closer to zero, and outputting voltage command values indicating voltages to be applied to respective phases of the brushless motor, to a motor drive circuit, in which the control unit sets the d-axis current command value Idref to a value larger than zero when the number of revolutions of the motor is smaller than a predetermined number.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: January 7, 2020
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Naohiko Aoki, Kiyoshi Ishikawa
  • Patent number: 10526005
    Abstract: A power converter for a three-phase electric rotary machine including first and second winding sets includes: first and second inverters corresponding to the first and second winding sets, respectively; and a control unit including a command calculation unit that calculates first and second voltage command values related to voltages to be applied to the first and second winding sets, and an excess correction unit that corrects first and second voltage command corresponding values corresponding to the first and second voltage command values. When one of the first and second voltage command corresponding values exceeds a limitation value which is set in accordance with a voltage capable of being outputted, the excess correction unit performs an excess correction process for correcting the other of the first and second voltage command corresponding values in accordance with an excess amount over the limitation value.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: January 7, 2020
    Assignee: DENSO CORPORATION
    Inventor: Takashi Suzuki
  • Patent number: 10526007
    Abstract: Provided is a power conversion device for suppressing a variation amount of a bus current to decrease a power loss in consideration of control of detecting the bus current during operation. In control by a power conversion part in accordance with a switching signal, a voltage vector is caused to bring a mode into a power running mode at a timing of detecting the bus current when an AC rotating machine is in a power running operation state, and the voltage vector is caused to bring the mode into a regeneration mode at a timing of detecting the bus current when the AC rotating machine is in a regeneration operation state, thereby decreasing the power loss due to the variation in the bus current.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: January 7, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Furukawa, Tatsuya Mori
  • Patent number: 10507866
    Abstract: An electric power steering apparatus may be employed to assist steering of a motor vehicle by conferring torque generated by an electric motor to a steering mechanism. The apparatus may include a steering controller that receives signals representative of vehicle velocity and torque applied to a steering wheel and a rotor position signal to derive a target motor torque, a motor controller that receives the target motor torque from the steering controller and transfers the target motor torque into target voltages expressed in a coordinate system fixed to a stator, and an inverter that transforms the target voltages into motor currents. The apparatus may further include a ripple compensation unit that compensates the target voltages for a (n?1)-th harmonic current by adding compensation voltages to the target voltages.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: December 17, 2019
    Assignees: THYSSENKRUPP PRESTA AG, THYSSENKRUPP AG
    Inventor: Dezsö Bakos
  • Patent number: 10505490
    Abstract: The invention is directed to omit an adjustment work of a motor control system and increase versatility.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: December 10, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Sumita, Yoshitaka Iwaji
  • Patent number: 10505478
    Abstract: In one implementation, a motor module according to the present invention includes: a motor driving circuit 10 to drive a motor M; and a position estimation device 30 to output an estimated position signal of a rotor R of the motor M. It also includes: a motor control circuit 20 to supply a command voltage value to the motor driving circuit 10 in response to a pulse signal; and a variable step-size memory 40 storing variable step-size information, which defines an amount of displacement of the rotor R per pulse of the pulse signal. The estimated position signal is an analog or digital signal. Upon receiving a pulse signal, the motor control circuit 20 determines the command voltage value based on an estimated position value of the rotor R acquired from the position estimation device 30 and the variable step-size information read from the variable step-size memory 40. The motor driving circuit 10 changes the position of the rotor R based on the command voltage value.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: December 10, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Atsushi Fujita, Shota Ishigami, Tomohiro Fukumura
  • Patent number: 10498207
    Abstract: A device and method for correcting a resolver offset of an eco-friendly vehicle is provided. The device and method are capable of correcting the resolver offset based on an angle of torsion occurring in a shaft of a motor rotor. Accordingly, the resolver offset is corrected more accurately.
    Type: Grant
    Filed: August 1, 2018
    Date of Patent: December 3, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jeong Won Rho, Young Un Kim, Jae Sang Lim
  • Patent number: 10488086
    Abstract: A domestic refrigeration appliance includes an insulated body with a coolable container delimiting a coolable space for food, a refrigerant circuit having a coolant and a compressor for cooling the space, and an electronic control apparatus and an electric drive with a three-phase AC synchronous motor and a control element or inverter for activating the motor. The compressor includes a chamber with an inlet and with an outlet, a piston mounted displaceably within the chamber, a crankshaft and the motor. The motor has a number of pole pairs greater than 1, a stator and a rotor mounted rotatably relative to the stator and coupled to the piston by the crankshaft. During compressor operation, the motor causes the piston to reduce the size of a volume enclosed by the compressor chamber and the piston to compress the coolant. A method for operating a domestic refrigeration appliance is also provided.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: November 26, 2019
    Assignee: BSH Hausgeraete GmbH
    Inventors: Achim Paulduro, Tommy Beckmann, Christoph Spiegel, Moritz Klein
  • Patent number: 10451036
    Abstract: The present disclosure is directed to a method for controlling a wind turbine using an adjusted aerodynamic performance map. In one embodiment, the method includes monitoring at least one of an actual wind parameter or operating data of the wind turbine using one or more sensors. Further, the method includes determining an adjustment factor for the aerodynamic performance map based, at least in part, on either or both of the measured actual wind parameter or the wind turbine operating data. Moreover, the method includes applying the adjustment factor to a first aerodynamic performance map to obtain an adjusted aerodynamic performance map. Thus, the method also includes controlling the wind turbine based on the adjusted aerodynamic performance map.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: October 22, 2019
    Assignee: General Electric Company
    Inventors: Stefan Herr, Murray Fisher, Sara Simonne Delport, Jelmer Cnossen
  • Patent number: 10439523
    Abstract: In a method for controlling an operation of an electric motor, electric voltages applied to electric phases of the electric motor are generated and output in a modulation in a controlled manner dependent on a rotor position of the electric motor and a target/actual comparison of at least one first variable which characterizes a load on the electric motor or an actual rotational speed of the electric motor. A rotor position angle, which characterizes the rotor position, is complemented with a specified preliminary control angle and another regulated preliminary control angle component upon reaching a field weakening range of the electric motor so as to form a sum angle. The sum angle is used to characterize the rotor position in the modulation upon reaching the field weakening range. The disclosure also relates to a device for controlling an operation of an electric motor.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: October 8, 2019
    Assignee: Conti Temic microelectronic GmbH
    Inventors: Patrick Hinze, Andreas Schnell, Andreas Schulze
  • Patent number: 10439526
    Abstract: A field oriented control (FOC) system and method provides smooth field-oriented startup for three-phase sensorless permanent magnet synchronous motors (PMSMs) despite the absence of load information. The system uses the rotor flux projection on the d- or q-axis to determine whether the stator flux current reference being applied during reference startup phase is sufficient to spin the PMSM, thereby providing smooth operation during the reference startup phase and saving energy relative to applying rated current. The system also determines a suitable initial value for the stator torque current reference to use at the start of closed-loop sensorless FOC control mode based on an angle difference between the reference and estimated angles. Since this angle difference is reflective of the load on the PMSM, the selected initial value allows the system to achieve a smooth transition from reference startup mode to closed-loop sensorless FOC control mode.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: October 8, 2019
    Assignee: DANFOSS POWER ELECTRONICS A/S
    Inventor: Gang Tian
  • Patent number: 10432124
    Abstract: In a current detection apparatus, a corrector obtains first current-value pairs of the plural values of the corrective first phase current and the respective plural values of the corrective first phase bus-based current synchronized with the plural values of the corrective first phase current. The corrector obtains second current-value pairs of the plural values of the corrective second phase current and the respective plural values of the corrective second phase bus-based current synchronized with the plural pairs of the corrective second phase current. The corrector corrects at least target first and second phase currents detected by a first current detector based on the obtained first current-value pairs and the second current-value pairs to thereby align amplitudes of the respective target first and second phase currents with each other.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 1, 2019
    Assignee: DENSO CORPORATION
    Inventor: Yasuaki Aoki
  • Patent number: 10425031
    Abstract: In a motor driver of the present invention, voltage and current values measured by a voltage and current detector and a voltage value measured by a voltage detector are determined as first measurement results, in the state of turning on semiconductor switching elements connected between a positive terminal of a capacitor and motor coils. Voltage and current values measured by the voltage and current detector and a voltage value measured by the voltage detector are determined as second measurement results, in the state of, as to a group A, turning on a semiconductor switching element connected between the positive terminal of the capacitor and the motor coil, and as to a group B, turning on semiconductor switching elements connected between a negative terminal of the capacitor and the motor coil. The insulation resistance values are calculated between the motor coils of each group A or B and a ground.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: September 24, 2019
    Assignee: FANUC CORPORATION
    Inventors: Hiroyasu Satou, Masaya Tateda, Youichirou Ooi, Akira Hirai, Kiichi Inaba
  • Patent number: 10418929
    Abstract: Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: September 17, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Junichi Aizawa, Yoshikazu Nakano, Akihiro Daikoku, Shota Hanioka
  • Patent number: 10418922
    Abstract: A 3-phase motor driver circuit has a first input to be coupled to an output of a first phase current sensor, and a second input that represents a zero reference. A controller adjusts one or more of a first phase voltage, a second phase voltage, and a third phase voltage, until a comparison between the first input and the input indicates that the first input has reached the zero reference, and in response the controller captures an output of a second phase current sensor and an output of a third phase current sensor. The controller then stores, in memory, calibration data that is based on the captured outputs of the second and third phase current sensors. Other aspects are also described.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 17, 2019
    Assignee: Verb Surgical Inc.
    Inventor: Jan Bosteels
  • Patent number: 10396696
    Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator includes an adjustable damping module that has a value of virtual damping resistance that is applied at the current regulator. The value of virtual damping resistance is adjustable as a function of sampling frequency. A controller can control the current regulator by determining whether the sampling frequency has changed since a previous execution cycle of the current regulator, and when the sampling frequency has changed since the previous execution cycle, the controller can modify the damping value as a function of the sampling frequency to allow the damping value to change with the sampling frequency. The damping value has a new value of virtual damping resistance that is applied at the current regulator after modifying the damping value. The controller can then execute the current regulator in accordance with the modified damping value to generate the voltage commands.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: August 27, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Brent S. Gagas, Dwarakanath V. Simili, Caleb W. Secrest
  • Patent number: 10389284
    Abstract: A control arrangement of a multiple-stator machine, comprising a frequency converter for each of the plurality of stators and a controller for each frequency converter, wherein a controller of a frequency converter is realized to generate control signals for that frequency converter on the basis of current values relating to that stator, and to generate a compensation current value for a further controller on the basis of the received current values in the event of an open-circuit fault in a frequency converter; to receive a compensation current value from a further controller; and to compute a voltage reference for a subsequent transform stage of the controller on the basis of the received current values is provided. The invention further describes a current control module of a frequency converter controller of such a multi-stator machine; a multi-stator machine; and a method of performing fault-tolerant control of a multi-stator machine.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: August 20, 2019
    Assignee: SIEMENS GAMESA RENEWABLE ENERGY A/S
    Inventor: Nuno Miguel Amaral Freire
  • Patent number: 10374532
    Abstract: Disclosed are an apparatus, system and method for detecting, based on a mathematical model, a fault of a permanent magnet motor driven by a square wave. A fault diagnosis apparatus for the permanent magnet motor includes a current voltage measurement unit, a phase shift time calculation unit, and a control unit.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: August 6, 2019
    Assignee: KOREA ELECTRONICS TECHNOLOGY INSTITUTE
    Inventors: Joonsung Park, Jinhong Kim, Byongjo Hyon, Junhyuk Choi
  • Patent number: 10348230
    Abstract: A control device for an AC rotary machine includes a magnetic-pole-position correction amount calculation device that calculates a magnetic-pole-position correction amount based on a detection-current vector detected when a voltage application device applies a voltage to the AC rotary machine according to a voltage command and on the voltage command, and stores in a storage device the magnetic-pole-position correction amount as it is associated with the detection-current vector. At normal operation of the AC rotary machine, a voltage-vector command generation device generates a voltage command for normal operation based on the detection-current vector detected by a current vector detection device and the magnetic-pole-position correction amount associated with the detection-current vector.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: July 9, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yosuke Hachiya, Kunihiro Kawahara