Vector Control (e.g., Dq-axis Control, 3-2 Phase Conversion, Etc.) Patents (Class 318/400.02)
  • Patent number: 11329584
    Abstract: A control device applies voltages to an AC rotating machine based on voltage command values on stationary coordinates. Currents in a plurality phases flowing the rotating machine are detected as detection currents. Coordinate conversion is applied to those detection currents based on any phase in the rotating machine, for generate detection currents on rotational coordinates. Voltage command values on the rotational coordinates are generated based on current command values on the rotational coordinates and the detection currents. Coordinate conversion is applied to those voltage command values based on the any phase, for generate first voltage command values on the stationary coordinates. Phases of one of the first voltage command values and generated second voltage command values on the stationary coordinates are corrected to generate the second voltage command values. One of the second and the first voltage command values are selected as the voltage command values on the stationary coordinates.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: May 10, 2022
    Assignee: Mitsubishi Electric Cornoration
    Inventor: Akira Furukawa
  • Patent number: 11316460
    Abstract: A method of determining an electrical angle offset of a motor position sensor mounted to a multi-phase electric motor, the method comprising rotating a rotor of the multi-phase electric motor at a motor velocity using an external drive system, measuring a motor phase voltage of each phase of the multi-phase electric motor, the motor phase voltage comprising a back-EMF generated by the rotation of the motor, converting the motor phase voltage to a DQ reference frame to form a DQ motor phase voltage and calculating the electrical angle offset from the DQ motor phase voltages.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: April 26, 2022
    Assignees: ZF Active Safety and Electronics US LLC
    Inventors: Christopher David Dixon, Peter Geoffrey Scotson, Connel Brett Williams, Prerit Terway
  • Patent number: 11316467
    Abstract: An inverter controller is configured to control an inverter circuit that drives an on-vehicle electric motor by using an on-vehicle electricity storage device. The inverter controller includes a two-phase voltage command value deriving unit that derives two-phase voltage command values on the basis of an external command value delivered from an external device and an acquisition result of a speed acquiring unit, and a three-phase voltage command value deriving unit that derives three-phase voltage command values on the basis of the two-phase voltage command values. The three-phase voltage command value deriving unit derives the three-phase voltage command values on the basis of a voltage utilization factor, which is calculated on the basis of the two-phase voltage command values and the acquisition result.
    Type: Grant
    Filed: February 5, 2021
    Date of Patent: April 26, 2022
    Assignee: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Takashi Kawashima, Takashi Ogami, Yoshiki Nagata
  • Patent number: 11309817
    Abstract: Provided is a control device for a rotating machine including a magnetic pole position estimation unit, a vector calculation unit, a current command correction unit configured to correct a first d-axis current command and a first q-axis current command, to thereby output a second d-axis current command and a second q-axis current command, a voltage application unit configured to superimpose a high-frequency voltage including a specific frequency component on voltage commands on rotational coordinates. The magnetic pole position estimation unit is configured to estimate the position of the magnetic pole based on a state quantity of the specific frequency component. The current command correction unit is configured to correct the current commands so that a current amplitude of electrical angle frequency components is equal to or larger than a half of a current amplitude of the specific frequency component.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: April 19, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomoya Tachibana, Yoshihiko Kimpara
  • Patent number: 11290044
    Abstract: Provided is a motor control device capable of suppressing a sudden change in torque due to spike noise. A control device (motor control device) continues motor control using dq-axis current command values Id* and Iq* (current command values) or dq-axis detection current values real_Id and real_Iq before detecting a noise state (detection current values before a current supplied to a motor suddenly changes) instead of dq-axis detection current values real_Id and real_Iq (latest detection current values) when the current changes suddenly.
    Type: Grant
    Filed: January 24, 2019
    Date of Patent: March 29, 2022
    Assignee: HITACHI ASTEMO LTD.
    Inventors: Atsushi Komuro, Kohei Myoen
  • Patent number: 11290047
    Abstract: The present disclosure relates to a DC bus discharge control method, including that: an active discharge instruction is received; a motor current signal is acquired according to the active discharge instruction; the motor current signal is converted into a current signal in a stator coordinate system; a voltage control signal in the stator coordinate system is output based on the current signal in the stator coordinate system and a random current reference instruction of a preset stator coordinate system; and the voltage control signal in the stator coordinate system is converted into a three-phase voltage control signal, and a working state of a switching device is controlled according to the three-phase voltage control signal.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: March 29, 2022
    Assignee: GAC AION NEW ENERGY AUTOMOBILE CO. LTD
    Inventors: Zhuliang Xia, Wei Liu, Xingkun Qin, Huizhong Zhang, Zhantu Liao, Xiaokun Zhao
  • Patent number: 11283391
    Abstract: Systems and methods for detecting a current measurement gain error in a current measurement system is disclosed. The method includes reading an output voltage signal, extracting a signature of a current measurement gain error from the output voltage signal, detecting an existence of the current measurement gain error based on the signature, and responsive to detecting the existence of the current measurement gain error, identifying a diagnostic voltage phase in which the current measurement gain error exists.
    Type: Grant
    Filed: November 27, 2019
    Date of Patent: March 22, 2022
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Prerit Pramod, Varsha Govindu, Krishna MPK Namburi
  • Patent number: 11271499
    Abstract: Provided is a Direct Circuit (DC) bus discharge control method, including that: an active discharge instruction is received; a motor current signal is acquired according to the active discharge instruction; the motor current signal is converted into a current signal in a stator coordinate system; a voltage control signal in the stator coordinate system is output based on the current signal in the stator coordinate system and a current reference instruction of a preset stator coordinate system, the current reference instruction of the preset stator coordinate system being a high-frequency alternating current; and the voltage control signal in the stator coordinate system is converted into a three-phase voltage control signal, and a working state of a switching device is controlled according to the three-phase voltage control signal.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: March 8, 2022
    Assignee: GAC AION NEW ENERGY AUTOMOBILE CO. LTD
    Inventors: Zhuliang Xia, Lingwei Liang, Shu Cheng, Xiaokun Zhao, Xiutian Liu, Xiang Han
  • Patent number: 11271513
    Abstract: A driving device of one embodiment includes a phase estimator and a voltage controller. The phase estimator estimates a phase of stator interlinkage magnetic flux of an electric motor based on a current flowing through the electric motor, a voltage command of a drive voltage applied to the electric motor, and a winding resistance value of the electric motor. The voltage controller acquires a first voltage vector component in a direction in which the stator interlinkage magnetic flux acts and a second voltage vector component in a direction which is orthogonal to the direction in which the stator interlinkage magnetic flux acts for the voltage command of the drive voltage, and sets the voltage command of the drive voltage based on the first voltage vector component and the second voltage vector component.
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: March 8, 2022
    Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Electronic Devices & Storage Corporation
    Inventors: Takashi Takagi, Toshimitsu Aizawa, Shen Wang
  • Patent number: 11271502
    Abstract: The present invention discloses a control system for an electric machine. In order to control the electric machine, predetermined frequency components are extracted from manipulated variables or measurement variables of the electric machine and are multiplied by a previously calculated control matrix. The control matrix can be calculated in advance here. Different control matrices can be formed in advance for different applications. As a result, simple efficient and robust control of the electric machine is possible, in particular for optimising and minimising harmonics.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: March 8, 2022
    Assignee: Robert Bosch GmbH
    Inventors: Maximilian Manderla, Florian Malchow, Michele Hirsch
  • Patent number: 11233466
    Abstract: A thyristor starter is configured to accelerate a synchronous machine from a stop state to a predetermined rotation speed by sequentially performing a first mode of performing commutation of an inverter by intermittently setting DC output current of a converter to zero and a second mode of performing commutation of the inverter by induced voltage of the synchronous machine. The thyristor starter is further configured to raise induced voltage in proportion to the rotation speed of the synchronous machine by keeping field current constant and to suppress rise of the induced voltage by reducing the field current after the induced voltage reaches a first voltage value, in the first mode.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: January 25, 2022
    Assignee: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
    Inventors: Yasuaki Matsumoto, Hiroshi Ogino, Hironori Kawaguchi, Akinobu Ando, Ryoji Miyatake, Michio Kataoka
  • Patent number: 11228269
    Abstract: The present disclosure provides an arbitrary double vector and model prediction thrust control method and system, which belongs to the technical field of linear induction motor control. The present disclosure combines a double vector modulation algorithm to improve the modulation accuracy, in which two voltage vectors are used in one cycle, so that the amplitude of the fluctuation can be reduced, thereby improving the running performance of the motor. The addition of the double vector modulation strategy increases the complexity of the algorithm, and the calculation process is too complicated. The present disclosure further proposes a simplified search process instead of the traditional repeated calculation and comparison method, which eliminates the need for a complex online calculation process, thereby simplifying the implementation process of the algorithm in the actual system.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: January 18, 2022
    Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Wei Xu, Jianqiao Zou, Yi Liu, Dinghao Dong
  • Patent number: 11223309
    Abstract: In a motor control device that controls a sensorless-type motor, a controller estimates an initial magnetic pole position of a rotor of a motor by an inductive sensing scheme while sequentially setting a plurality of energization angles. At each of the set energization angles, the controller converts peak values of currents flowing through a plurality of phases of a stator winding into a first current component having an electrical angle that is equal to a corresponding one of the set energization angles and a second current component that is different in electrical angle by 90 degrees from the first current component, to correct the first current component based on the second current component. The controller estimates the initial magnetic pole position of the rotor based on the corrected first current component that is obtained at each of the set energization angles.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: January 11, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroyuki Yoshikawa, Yuta Tachibana, Yuji Kobayashi, Kazumichi Yoshida, Daichi Suzuki, Harumitsu Fujimori
  • Patent number: 11223313
    Abstract: A device according to an embodiment includes an inverter main circuit; a detector configured to detect a current of an output line of the inverter main circuit; a starting time controller comprising a rotational phase angle estimator configured to calculate, based on a current response value detected by the detector, a value corresponding to a rotational phase angle of a motor connected to the inverter main circuit in a stationary reference frame, and a rotational speed estimator configured to calculate a value corresponding to a rotational speed of the motor by using the value corresponding to the rotational phase angle when the inverter main circuit is started; and a regular time controller configured to calculate, with the value corresponding to the rotational speed as an initial value, an estimated rotational phase angle of the motor in a rotating reference frame.
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: January 11, 2022
    Assignees: Toshiba Infrastructure Systems & Solutions Corporation, Toshiba Industrial Products and Systems Corporation
    Inventors: Shun Taniguchi, Kazuya Yasui, Tomoaki Shigeta
  • Patent number: 11218101
    Abstract: In a motor control device in one embodiment, an initial position estimation unit estimates an initial position of a magnetic pole of a rotor of a motor in an inductive sensing scheme. At each of energization angles, the initial position estimation unit multiplies a ?-axis current component I? corresponding to a peak value of a current flowing through a stator winding by each of a cosine value and a sine value of a correction angle obtained by correcting each of the energization angles. The initial position estimation unit estimates the initial position of the magnetic pole of the rotor based on a ratio between an integrated value of a multiplication result about the cosine value and an integrated value of a multiplication result about the sine value.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: January 4, 2022
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuta Tachibana, Hiroyuki Yoshikawa, Yuji Kobayashi, Kazumichi Yoshida, Daichi Suzuki, Harumitsu Fujimori
  • Patent number: 11205987
    Abstract: A specialized variable speed drive of the present invention is capable of controlling a motor and increasing the efficiency of both an ACIM or DCBL motor by biasing operation in favor of a class AB mode. The variable speed drive may be configured with two gate drivers where one gate driver is a class D gate driver and the second gate driver is either a class AB gate driver or a class C gate driver. The system also operates to reduce electro-magnetic interference in the operation of motors while increasing the reliability of the overall VSD system.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: December 21, 2021
    Inventors: Haik Biglari, David Young, Nicolas Mateo, Matthew Owney
  • Patent number: 11201574
    Abstract: An MPU sequentially selects one from six energization patterns, applies constant voltage rectangular pulses to the three-phase coils for a prescribed sensing energization time, turns on at least the low-side arm of the three-phase half-bridge type inverter circuit so as to reflux an induced current between a switching element and the coils and attenuate the same, measures peak coil current values immediate before completing the sensing energization by an A/D-converter circuit, and stores the peak coil current values as measured data.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: December 14, 2021
    Assignee: SHINANO KENSHI KABUSHIKI KAISHA
    Inventor: Kazuki Suzuki
  • Patent number: 11201575
    Abstract: A monitoring device for a reluctance machine includes a vector rotator for rotating a space phasor of the reluctance machine that depends on a voltage in a coordinate system that rotates with a negative fundamental frequency, a low-pass filter filtering the rotated space phasor and producing an output signal, and a signal evaluation device evaluating the output signal. A DC value of the produced output signal in the rotating coordinate system is monitored, and an error in operating the reluctance machine is identified when the DC value is above a predefined threshold value.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: December 14, 2021
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Harald Sinner, Thilo Weigel
  • Patent number: 11196364
    Abstract: A motor control device is configured to control a motor as a dynamic force source depending on a position of a rotation detection object that rotates while interlocking with the motor, the motor and the rotation detection object being included in a mechanical apparatus including a plurality of constituent elements that interlock with each other. The motor control device includes a computation circuit configured to compute an absolute rotation angle of the rotation detection object, using a relative rotation angle of a first constituent element of the mechanical apparatus that is detected through a relative angle sensor provided in the mechanical apparatus, and a rotation number conversion value resulting from converting an absolute rotation angle of a second constituent element of the mechanical apparatus that is detected through an absolute angle sensor provided in the mechanical apparatus, into a rotation number of the first constituent element.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: December 7, 2021
    Assignee: JTEKT CORPORATION
    Inventors: Shouta Zouza, Yuuki Nakashima, Yuji Fujita, Toshihiro Takahashi, Xavier Palandre
  • Patent number: 11192576
    Abstract: A steering device includes: a turning actuator drive command signal output section to output the turning actuator drive command signal, a turning actuator drive command signal including a drive command signal, and a test drive command signal, the drive command signal being outputted to the turning actuator when the vehicle is in a first state, the test drive command signal being outputted to the turning actuator when the vehicle is in a second state, the turning actuator operation signal input section to receive a signal relating to the operation of the turning actuator, and the abnormality diagnosis section to judge whether or not the steering device is in an abnormal state, based on the signal relating to the operation of the turning actuator with respect to the test drive command signal.
    Type: Grant
    Filed: September 3, 2019
    Date of Patent: December 7, 2021
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Yuta Ushiro, Mitsuaki Nakada
  • Patent number: 11190125
    Abstract: A control system includes a power inverter configured to convert direct current (DC) power into alternating current (AC) power, an electric motor configured to be driven using the AC power output by the power inverter, and a controller configured to control the AC power by performing switching between multi-pulse control and one-pulse control on the basis of electric power loss of the electric motor and the power inverter and noise of the electric motor, the controller being a control device configured to control the power inverter.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: November 30, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Daiki Kajino, Hidetoshi Matsuura, Tomoyuki Sano, Takahiro Endou, Tatsunori Obe
  • Patent number: 11177752
    Abstract: Technical solutions are described for preventing controller windup in a motor control system. An example system includes a first anti-windup module that receives a commanded voltage and a limited voltage command. The limited voltage command is applied to an electric motor, where the first anti-windup module generates a first modified current command by modifying a current command that is applied to the motor control system. The modification is based on a ratio of the commanded voltage and the limited voltage command. The system further includes a second anti-windup module that receives the commanded voltage and the limited voltage command. The second anti-windup module generates a second modified current command by modifying the first modified current command. The modification based on a difference between the commanded voltage and the limited voltage command.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: November 16, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Prerit Pramod, Zhe Zhang
  • Patent number: 11177745
    Abstract: An electric motor apparatus having a controller and a torque demand signal modifier. The controller may produce a set signals to a drive stage of the motor where the drive stage applies a voltage to each phase of the motor to cause currents to flow in each phase of the motor corresponding to a current demand signal fed into the controller. The torque demand signal modifier may receive a target torque demand signal representative of a target torque demanded from the motor and outputs an actual torque demand signal which is converted into the current demand signal that is fed to the controller. The actual torque demand increases in value as a function of time towards the target torque demand value following a predefined ramp selected to ensure that the maximum current gradient of the current demand does not exceed a predetermined limit.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: November 16, 2021
    Inventor: Vasile Coroban-Schramel
  • Patent number: 11140289
    Abstract: An apparatus according to the aspect of the embodiments includes a phase determiner configured to determine a rotational phase of a rotor, a speed determiner configured to determine a rotational speed of the rotor, a controller having a first control mode for controlling the motor by supplying constant currents to windings, and a discriminator configured to discriminate whether a rotation of the motor is abnormal based on the rotational speed when the rotational speed corresponding to a command speed is equal to or higher than a predetermined value in a state where the controller is controlling the motor in the first control mode. When a signal output from the discriminator indicates that the rotation of the motor is abnormal, the controller stops the motor. When the signal output from the discriminator indicates that the rotation is not abnormal, the controller continues a drive of the motor.
    Type: Grant
    Filed: February 11, 2020
    Date of Patent: October 5, 2021
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Yuta Nito
  • Patent number: 11121657
    Abstract: A method is described for estimating a position of a rotor in a synchronous electric machine having a rotor. The method has the steps of: inputting the initial rotor angle into a power converter, injecting a first voltage waveform with a first fundamental frequency into the power converter,—injecting a second voltage waveform with a second fundamental frequency into the power converter, the second voltage waveform being offset with an offset angle ??, determining a resulting second axis current in the power converter at the second fundamental frequency, adjusting, for each torque value, the offset angle ?? so that the resulting second axis current at the second fundamental frequency becomes zero, and estimating the position of the rotor based on the plurality of offset angle values.
    Type: Grant
    Filed: January 17, 2020
    Date of Patent: September 14, 2021
    Assignee: ABB Schweiz AG
    Inventor: Omer Ikram Ul Haq
  • Patent number: 11104374
    Abstract: A motor control device including: a voltage command value calculation unit configured to calculate a voltage command value of voltage applied to a motor, based on a q-axis current command value and a d-axis current command value; a driving circuit configured to output driving power to the motor, based on the voltage command value; a d-axis current command value calculation unit configured to calculate the d-axis current command value limiting the voltage command value to a maximum voltage applicable to the driving circuit or less by field-weakening control; a d-axis current command value limitation unit configured to limit the d-axis current command value; and a q-axis current command value limitation unit configured to limit the q-axis current command value lest the voltage command value exceed the maximum voltage due to limitation of the d-axis current command value by the d-axis current command value limitation unit.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: August 31, 2021
    Assignee: NSK LTD.
    Inventor: Yasutoshi Miki
  • Patent number: 11104377
    Abstract: A gain target value is set to a usual value when battery voltage is within a usual range, and to a value below the usual value when the battery voltage is outside the usual range. When the battery voltage is recovered from outside the usual range to the usual range, it is determined whether or not a ratio obtained by dividing a time-integrated value of a gain in a period from when the battery voltage goes outside the usual range to when being recovered to the usual range by a time-integrated value of the gain when the gain in the period is the usual value is larger than a prescribed threshold. When determined to be larger than the prescribed threshold, the gain is set to immediately increase up to the gain target value, otherwise the gain is set to gradually increase up thereto.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: August 31, 2021
    Assignee: NSK LTD.
    Inventors: Tsutomu Shibata, Takamitsu Koukami
  • Patent number: 11095242
    Abstract: A control device for controlling the current of a rotating field machine of a motor vehicle, includes a current controller for determining a fundamental of an output voltage for a respective operating point, a controller for modulating the output voltage by driving a rectifier of the control device based on a pulse pattern optimized offline for the respective operating point, and a current sensor for sampling a harmonics-impacted output current, resulting from the pulse pattern that is used, of the rectifier and for returning the sampled output current to the current controller. Sampling times for sampling the output current are optimized offline in a manner specific to the pulse pattern and are predetermined as those times at which a deviation between the harmonics-impacted output current and a fundamental of the output current is less than a predetermined threshold value.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: August 17, 2021
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventor: Daniel Glose
  • Patent number: 11081993
    Abstract: A method for operating a permanent magnet synchronous motor, an operational vector being determined in a multi-stage process. A motor assembly configured to perform such a method is also disclosed.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: August 3, 2021
    Assignee: CONTINENTAL TEVES AG & CO. OHG
    Inventors: Tom Kaufmann, Bogdan Budianu, Eugen Bartel, Dominik Schulte, Peter Stauder
  • Patent number: 11075597
    Abstract: A motor control device controls driving of a motor in response to d-axis and q-axis current commands set on the basis of a torque command. The motor control device includes: an electrical angle estimation unit configured to estimate an electrical angle of the motor according to at least one of methods of estimating the electrical angle on the basis that a leakage current in a q axis becomes zero by applying a voltage to a d axis, on the basis that at least one of a phase current difference and a line current difference caused by an induced voltage generated due to rotation of the motor becomes zero, and on the basis of a voltage equation, depending on an angular velocity of the motor, a modulation rate of a pwm signal, and whether a magnetic flux change is included in a nonlinear region.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: July 27, 2021
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Kenji Todu, Misato Maeda, Naoki Onosaka, Keirei Lin, Genki Yamashita
  • Patent number: 11070155
    Abstract: A method of determining angular position (?) of a rotor of an N-phase permanent magnet motor (PMM). A processor having an associated stored angular position determination (APD) algorithm is programmed to implement the algorithm to cause an associated motor controller to execute steps including forcing one vector at a time a phase vector set of current or voltage vectors to stator terminals of windings for the N-phases a positive and negative magnitude vector, wherein the vector magnitude is sufficiently small to not move the rotor, and a time duration for the forcing current or voltage vectors is essentially constant. The resulting stator current or voltage levels are measured for each current or voltage vector. An N-dimension current vector or voltage vector is generated from superposition of the resulting stator current levels or resulting stator voltage levels. The N-dimension current vector or voltage vector is used to determine angular position.
    Type: Grant
    Filed: January 13, 2020
    Date of Patent: July 20, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Eric James Thomas, David Patrick Magee
  • Patent number: 11056993
    Abstract: A control device includes an inverter, a sensor, a controller, and a filter. The inverter supplies power to an electric motor based on a control on the electric motor. The sensor detects a current supplied from the inverter to the electric motor. The controller executes current vector control by calculating a feedback command value and a feedforward compensation value based on a torque command value, the feedback command value being indicative of a voltage value for decreasing deviation in a supply current to the electric motor, the feedforward compensation value being a value for compensating the feedback command value. The filter performs a filtering process on the feedback command value to pass a low-frequency component of the feedback command value. When the control is switched to voltage phase control, the controller initializes the voltage phase control based on the feedforward compensation value and an output from the filter.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: July 6, 2021
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Sho Ohno, Hiromichi Kawamura
  • Patent number: 11050375
    Abstract: A method is provided for determining a parameter of a field-oriented control (FOC) model for an electric power unit, the electric power unit comprising a three-phase electric motor and an inverter drive for driving the electric motor. The method comprises sending a control signal to the inverter drive; applying a predefined electric voltage to at least two of the phases of the electric motor by the inverter drive in response to the control signal; measuring an electric current that flows in the at least two phases of the electric motor in response to the applied electric voltage; and determining the parameter of the control model for the electric power unit using a value of the applied predefined electric voltage and a value of the measured electric current. An apparatus for determining a parameter of a control model for an electric power unit is provided.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: June 29, 2021
    Assignee: Zapi S.P.A.
    Inventor: Gionata Bigi
  • Patent number: 11038452
    Abstract: A motor control system includes a motor and a processor, and the processor is electrically connected to the motor. The processor performs the following actions: calculating the d-axis magnetic flux and the q-axis magnetic flux in a synchronous rotating reference frame according to the information fed back by the motor; multiplying the d-axis magnetic flux and the q-axis magnetic flux by a d-axis current feedback and a q-axis current feedback to be a d-axis flux-current product and a q-axis flux-current product respectively; subtracting the q-axis flux-current product from the d-axis flux-current product to get a flux-current product error; sending the flux-current product error to a proportional-integral controller to generate a present compensation current-angle command; adding the present compensation current-angle command and a previous current-angle command to obtain the present current-angle command; sending the present current-angle command to a d-q axis current regulator for processing.
    Type: Grant
    Filed: November 25, 2019
    Date of Patent: June 15, 2021
    Assignee: National Central University
    Inventors: Faa-Jeng Lin, Shih-Gang Chen, Chia-Hui Liang
  • Patent number: 11031886
    Abstract: A lead angle adjustment circuit includes a counter that receives an input signal and has an output that is connected to a multiplier circuit. The multiplier circuit has an output connected to a subtractor circuit that has an output connected to a pseudo FG generator circuit. The output of the counter is also connected to a storage register that is coupled to an addition circuit through a range determination circuit, a slope determination circuit, and a multiplier determination circuit. The input signal is input to another counter which is connected to the addition circuit through a start determination circuit and an advance angle calculation circuit. The outputs of the multiplier determination circuit and the advance angle calculation circuit are input to the addition which, which generates a signal is subtracted by the subtractor circuit to generate the signal input into the pseudo FG generator circuit.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: June 8, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Takashi Ogawa
  • Patent number: 11025184
    Abstract: A rotation electric machine controller that is applied to a system including a rotation electric machine and a power converter is provided. The rotation electric machine controller includes: a d-axis command value set portion that sets a negative d-axis current command value; and an operation portion that operates the power converter to control a d-axis current to the d-axis current command value. The d-axis command value set portion increases an absolute value of the d-axis current command value in response to that the q-axis parameter is larger than the target value. The d-axis command value set portion decreases the absolute value of the d-axis current command value in response to that the q-axis parameter is less than the target value.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: June 1, 2021
    Assignee: DENSO CORPORATION
    Inventor: Hiroyasu Otake
  • Patent number: 11012018
    Abstract: A system includes a motor-driven component, a motor configured to operate the motor-driven component, and a motor drive circuit configured to power the motor. The motor drive circuit includes at least one complementary stage, where each stage includes a first transistor and a second transistor. During operation of the motor drive circuit, the first transistor is switched on when the second transistor is switched off. The system includes a controller communicatively coupled to the motor drive circuit. A load condition associated with the component is monitored. Based on the load condition, the controller determines whether the component is operating at a light load condition. If the component is operating at the light load condition, a switching frequency of each of stages is changed from a first switching frequency to a second switching frequency, which is less than the first switching frequency.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: May 18, 2021
    Assignee: Lennox Industries Inc.
    Inventor: Jose Juan Sandoval
  • Patent number: 11008693
    Abstract: Disclosed herein is a washing machine. The washing machine includes a housing provided with an inlet for laundry disposed on a front surface thereof, a water tub provided inside of the housing and configured to store water, a drum rotatably provided inside of the water tub, a pulsator provided inside of the drum and configured to be rotated independently of the drum, a motor provided with a stator, and a first and second rotor connected to the drum and the pulsator, respectively, and at least one processor configured to apply a q-axis current to the stator to rotate the second rotor and configured to apply a d-axis current to the stator to rotate the first rotor based on a phase difference between the first rotor and the second rotor.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: May 18, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hidekazu Funakoshi, Tomonori Ueno, Yukinori Nakagawa, Hiroshi Katsumoto, Taro Yoshida, Yasuyuki Sonoda, Masaki Oshige, Yasumasa Nagasaki
  • Patent number: 11005406
    Abstract: Disclosed embodiments are directed to a technique to remove DC offset from current measurement signals through shunt resistors in digital signal processing for current reconstruction when using discontinuous pulse width modulation (DPWM). Such measurements regarding current are pertinent to a feedback loop used for a system including a DC-link capacitor, inverter, and motor. A method of removing DC offset comprises: determining a three-phase output current signal of an inverter, wherein the inverter is coupled to a motor and a power supply; producing a voltage signal based on the three-phase output current signal and the resistances of one or more shunt resistors disposed in the inverter; applying an analog gain circuit to the voltage signal; processing the voltage signal with an analog-to-digital converter (ADC); applying a DC offset corrector to the voltage signal; and performing current reconstruction on the voltage signal to produce a continuous current signal.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: May 11, 2021
    Assignee: Toshiba International Corporation
    Inventors: Goutham Selvaraj, Yu Liu
  • Patent number: 10998844
    Abstract: An apparatus for controlling a multi-winding motor may include: a current detector configured to detect currents of a plurality of windings, each of the windings associated with a corresponding rotor; an abnormal determiner configured to determine abnormality of at least one of the plurality of windings on the basis of the currents of the plurality of windings; a compensation calculation unit configured to calculate a current phase offset and/or compensation current of each of the plurality of windings according to the determined abnormality; and a signal output unit configured to output control signals to control at least one of the plurality of windings according to the current phase offset and/or the compensation current.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: May 4, 2021
    Assignee: MANDO CORPORATION
    Inventor: Tae Sik Kim
  • Patent number: 10985679
    Abstract: A continuously rotating electric motor includes a rotor provided with permanent magnets and a stator formed by two coils in which, when the rotor is rotating, two induced voltage signals (UB1 and UB2) are respectively generated, which signals have an electric phase shift ? where 5°???90°, preferably 30°<?<65°. The control device includes a circuit for detecting intersection times (TC) at which values of the two induced voltage signals are substantially equal. The control device is arranged to generate electric driving pulses to rotate the rotor, which are respectively initiated at initiation times determined by respective intersection times, and such that the electric driving pulses can be applied to the two coils arranged in series. Preferably, the control device is arranged such that the initiation times of the electric driving pulses occur directly after detections of corresponding intersection times.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: April 20, 2021
    Assignee: The Swatch Group Research and Development Ltd
    Inventors: Jean-Jacques Born, Laurent Nagy, Christophe Germiquet
  • Patent number: 10960922
    Abstract: A control system for monitoring operation of an electric motor includes a plurality of position sensors configured to measure a position of the electric motor, an indirect position estimation module configured to indirectly estimate the position of the motor, and an error monitoring module. The error monitoring module is configured to perform at least one of: comparing a measured position from the plurality of position sensors to an estimated position from the sensor position estimation module, and detecting a failure of at least one of the one or more position sensors based on the comparison; and calculating a difference between the measured position from one of the plurality of position sensors and the measured position from another of the plurality of position sensors, and causing the indirect position estimation module to initiate estimation of the position of the motor based on the difference.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: March 30, 2021
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Prerit Pramod, Rakesh Mitra, Jeffery A. Zuraski, Ashok Chandy, Julie A. Kleinau
  • Patent number: 10951146
    Abstract: A segmented electrical drive system comprising a DC power bus comprising a DC voltage supply and a capacitor in parallel, an inverter comprising a plurality of inverter segments, a motor including a plurality of stator winding segments each connected to an inverter segment, and a controller. The controller receives a control signal and sends a switching signal to each of the inverter segments, wherein the switching signal is based on a discontinuous space vector pulse width modulation (DSVPWM) scheme for a segmented inverter. The DSVPWM scheme includes a set of reverse sawtooth carrier signals that are at an optimal phase shift angle with respect to each other.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: March 16, 2021
    Assignee: Karma Automotive LLC
    Inventors: Lixin Tang, Geng Niu
  • Patent number: 10944336
    Abstract: A power conversion apparatus with an arm fuse melting detector for detecting an arm fuse melting from a ripple current without using a micro switch. The power conversion apparatus includes an inverter for driving a motor, an arm fuse provided in each of U-phase, V-phase, and W-phase arms of the inverter, and a first arm fuse melting detector to detect the arm fuse melting. The first arm fuse melting detector includes a DQ conversion circuit that converts the inverter output current into the D-axis/Q-axis current, an absolute value calculation circuit for calculating the absolute value from the output of the DQ conversion circuit, a ripple current calculator for calculating a ripple current from the difference between the maximum value and the minimum value of the absolute value for each cycle period T of the fundamental wave of the inverter output.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: March 9, 2021
    Assignee: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Yuki Sakai, Kazunori Matsumoto
  • Patent number: 10921778
    Abstract: A system comprising a processor, a non-transitory memory, and an application stored in the non-transitory memory is provided. The application is configured, upon execution by the processor, to cause the processor to generate a first controller signal based on a first set of feedback from an electric motor, based on a characterization tone, and based on a controller gain, to provide the first controller signal for operation of the electric motor, to generate a frequency response analysis on a second set of feedback from the electric motor in response to the first controller signal, and to determine a new value of the controller gain based on the frequency response analysis.
    Type: Grant
    Filed: May 3, 2019
    Date of Patent: February 16, 2021
    Assignee: Texas Instruments Incorporated
    Inventors: Ramesh Tiruvannamalai Ramamoorthy, Sam Gnana Sabapathy, Manish Bhardwaj
  • Patent number: 10913486
    Abstract: A steering apparatus, a steering method, and a steering control device. A steering motor includes a first winding and a second winding respectively receiving three-phase power. A first steering controller controls the power supplied to the first winding. A second steering controller controls the power supplied to the second winding. A detector detects whether or not a phase among three phases corresponding to each of the first and second windings is open; and a controller. If the phase among the three phases is detected to be open, the controller controls one steering controller corresponding to the open phase, among the first steering controller and the second steering controller, in accordance with an angular velocity of a steering wheel and the rotational speed of the steering motor, so that the steering motor generates additional torque.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: February 9, 2021
    Assignee: MANDO CORPORATION
    Inventors: Jong Hoon Lee, Jong Hak Jin
  • Patent number: 10886867
    Abstract: An inverter control device that controls an inverter as a control target, the inverter being connected to a direct-current power supply and connected to an alternating-current rotating electrical machine so as to convert power between direct current and alternating current of a plurality of phases, and the inverter having an arm for each alternating-current phase, the arm including a series circuit of an upper-stage switching element and a lower-stage switching element, the inverter control device including an electronic control unit.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 5, 2021
    Assignee: AISIN AW CO., LTD.
    Inventors: Subrata Saha, Arinori Shimada, Yuki Sugiyama, Masaya Kokubo
  • Patent number: 10879818
    Abstract: A linear actuator comprises a brushless DC motor (31), a driver circuit (51) for providing a multiphase voltage signal to the motor (31) and a controller (58) for detecting a rotor position and providing control signals to the driver circuit (51) in dependence thereof. Detector circuitry (61) detects a signal indicative of rotor speed. The controller (58) is configured to control the driver circuit (51) to drive the motor with a first waveform of the multiphase voltage signal, when the indicative signal indicates that the rotor speed does not exceed a predetermined speed; and control the driver circuit (51) to drive the motor with a second waveform of the multiphase voltage signal, when the indicative signal indicates that the rotor speed exceeds the predetermined speed, wherein the second waveform is selected to drive the motor (31) with an efficiency less than the efficiency when driven by the first waveform.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: December 29, 2020
    Assignee: LINAK A/S
    Inventor: Jeppe Christian Bastholm
  • Patent number: 10875450
    Abstract: This disclosure relates to an electrified vehicle and a method for providing driver feedback by producing a torque ripple. An exemplary electrified vehicle includes, among other things, an electric machine configured to generate a torque output, and a controller configured to selectively adjust the torque output to produce a torque ripple in response to a triggering event.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: December 29, 2020
    Assignee: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Chris Wolf, Michael Degner, Yue Nie
  • Patent number: 10879825
    Abstract: The sensorless position measurement system for the permanent magnet machine utilizes the preprocessing circuit to couple with the inverter for obtaining the line-to-line PWM signal supplied to the permanent magnet machine. The preprocessing circuit converts negative PWM pulses of the line-to-line PWM signal into positive PWM pulses for obtaining the converted line-to-line PWM signal. The function of the preprocessing is achieved by the differential circuit and the polarity correction circuit. The converted line-to-line PWM signal is a digital signal and captured by the capture modulator. The preprocessing circuit is substituted for the analog to digital converter. The microcontroller determines the angular position of the permanent magnet machine based on the converted line-to-line PWM signal.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: December 29, 2020
    Assignee: NAROLLER ELECTRONICS CO., LTD.
    Inventors: Guan-Ren Chen, Cheng-Lung Lee, Hsiang-Yi Yang