Having Protection Means (e.g., Switching Circuit Protection, Stall Protection, Failure To Start, "wrong" Direction, Etc.) Patents (Class 318/400.21)
  • Patent number: 10958201
    Abstract: A method of controlling a motor includes determining a first motor controlling parameter measurement based on a signal received from a position sensor, determining a second motor controlling parameter based on one or more motor electrical parameters, and controlling operation of the motor based on at least one of the first motor controlling parameter measurement or the second motor controlling parameter measurement.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: March 23, 2021
    Assignee: SZ DJI TECHNOLOGY CO., LTD.
    Inventors: Qiu Lan, Changxing Zhou, Wanqi Liu
  • Patent number: 10886870
    Abstract: A fault communication system includes a system controller and a plurality of devices. Each one of the plurality of devices includes a single fault terminal. A fault bus consisting of only a single wire coupled to the system controller and the plurality of devices is also included. The fault bus is coupled to provide multidirectional multi-fault group communication between the plurality of devices and the system controller. The single fault terminal of each one of the plurality of devices includes is coupled to the fault bus to provide the multidirectional multi-fault group communication between the plurality of devices and the system controller.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: January 5, 2021
    Assignee: Power Integrations, Inc.
    Inventors: Stefan S. Baurle, Mingming M. Mao
  • Patent number: 10848049
    Abstract: A plurality of semiconductor devices (1) are connected in parallel with each other. A gate driver (13) supplies a gate voltage to gates of the plurality of semiconductor devices (1). A gate wire (14,16) are sequentially connected to the gates of the plurality of semiconductor devices (1) from the gate driver (13). An energizing ability of each of the semiconductor devices (1) indicates how easily collector current flows in response to the supplied gate voltage. The plurality of semiconductor devices (1) having a lower energizing ability are connected closer to the gate driver (13).
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: November 24, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Junya Sakai
  • Patent number: 10836423
    Abstract: In an electric power steering device including a controller, which is configured to carry out feedback control for a motor including independent two coil winding groups and being configured to rotate a steering mechanism of a vehicle, when one of the two groups recovers from a failure that has occurred in the one group while control is continued solely by another group due to the failure, the controller resumes cooperative control by the two groups, and when starting the cooperative control, sets target current values of the one group and the another group to values different from a final target current value based on an actual current value or a target current value of the another group at a time of the recovery, to thereby output respective control amounts for the cooperative control.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: November 17, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akira Furukawa, Akihiko Mori, Eiji Iwami
  • Patent number: 10826416
    Abstract: A motor device includes a motor having coils of three phases and a single-phase coil. The motor device includes a drive circuit of a first system capable of supplying a drive current to the coils of the three phases and a drive circuit of a second system capable of supplying a drive current to the single-phase coil. The drive circuit of the second system is different from the drive circuit of the first system. The drive circuit of the first system includes a three-phase inverter circuit connected to one end of each of the coils of the three phases, and the drive circuit of the second system includes a single-phase inverter circuit connected to both ends of the single-phase coil.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: November 3, 2020
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Satoshi Hatahara, Wataru Nogamida
  • Patent number: 10804834
    Abstract: In order to improve a method for selecting a frequency converter for a refrigerant compressor unit that includes a refrigerant compressor and an electric drive motor such that the frequency converter is selected in a manner for optimized use, it is proposed that a working state suitable for operation of the refrigerant compressor unit should be selected within an application field of an application graph of the refrigerant compressor, that an operating frequency for this selected working state should be selected, and that a working state operating current value that corresponds to the selected working state and the selected operating frequency should be determined from drive data, for operation of the refrigerant compressor unit.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: October 13, 2020
    Assignee: BITZER Kuehlmaschinenbau GmbH
    Inventors: John Gibson, Tobias Hieble, Julian Pfaffl, Juergen Nill, Ferdinand Breithuth
  • Patent number: 10668945
    Abstract: A motor control apparatus includes: multiple motor drive circuits that drive at least one motor; and multiple microcomputers that are operated by a microcomputer power source and include a drive signal generator that generates a motor drive signal. The microcomputers include at least one microcomputer including a stop determiner that determines that operation of an own microcomputer is about to be stopped and transmits information as a stop determination signal. A microcomputer having received the stop determination signal from at least one different microcomputer actually stops operation of an own microcomputer.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: June 2, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masaya Taki, Toshimitsu Sakai, Koichi Nakamura, Shuji Kuramitsu
  • Patent number: 10644642
    Abstract: To provide a three phase duplexing motor for electric power steering apparatus that can manage increase in a supply current and can manage influence on motor, when increasing a supply current to the three phase windings of the normal set. An three phase duplexing motor for electric power steering apparatus sets 0 to a supply current to three phase winding of abnormality occurrence set, and increases a supply current to three phase windings of the normal set, with a preliminarily set increase upper limit current value as an upper limit.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 5, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Satoru Akutsu, Yoshihito Asao
  • Patent number: 10527676
    Abstract: An abnormality diagnosing device diagnoses a driving abnormality of a single motor driven by a plurality of motor driving devices. The motor driving devices drive the motor by supplying three-phase alternating currents to a plurality of three-phase windings possessed by the motor. The abnormality diagnosing device is equipped with a rotational speed acquisition unit for acquiring a rotational speed value of the motor, a current acquisition unit for acquiring phase current values of respective phases flowing through the three-phase windings, and a determination unit for determining the presence of an abnormality, if an absolute value of the rotational speed value exceeds a predetermined value, and an absolute value of the phase current value of any one phase of the three-phase windings is less than a threshold value continuously for a predetermined time period.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: January 7, 2020
    Assignee: FANUC CORPORATION
    Inventors: Yuuki Morita, Tadashi Okita, Kenji Takahashi
  • Patent number: 10498283
    Abstract: Provided is a motor drive device capable of adjusting a 0-axis current to a desired value. A motor drive device (inverter device 100) for an open winding type motor 200 in which a stator winding wire includes three-phase independent winding wires 210, 220, and 230 includes a plurality of single-phase inverters 160, 170, and 180 provided for each of the winding wires 210 to 230 to individually apply a voltage to a corresponding winding wire, and a controller 150 that controls each of the single-phase inverters 160 to 180. The controller 150 adjusts a 0-axis current to a predetermined value by alternately and repeatedly generating a first period in which a sum of voltages applied to the respective independent winding wires 210 to 230 is set to a value other than zero to offset the 0-axis current and a second period in which the sum of the voltages applied to the respective winding wires 210 to 230 is set to zero.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: December 3, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshisada Mitsui, Hideki Miyazaki, Seigo Yukutake, Katsuhiro Hoshino
  • Patent number: 10488465
    Abstract: An abnormality diagnosing device diagnoses a driving abnormality of a single motor driven by a plurality of motor driving devices. The motor driving devices drive the motor by supplying three-phase alternating currents to a plurality of three-phase windings possessed by the motor. The abnormality diagnosing device is equipped with a rotational speed acquisition unit for acquiring a rotational speed value of the motor, a current acquisition unit for acquiring phase current values of respective phases flowing through the three-phase windings, and a determination unit for determining the presence of an abnormality, if an absolute value of the rotational speed value exceeds a predetermined value, and an absolute value of the phase current value of any one phase of the three-phase windings is less than a threshold value continuously for a predetermined time period.
    Type: Grant
    Filed: May 1, 2018
    Date of Patent: November 26, 2019
    Assignee: FANUC CORPORATION
    Inventors: Yuuki Morita, Tadashi Okita, Kenji Takahashi
  • Patent number: 10486739
    Abstract: Short circuit abnormality between redundant systems with respect to motor redundant systems is detected. A motor actuator includes a first inverter circuit configured to control power supplied to a first motor stator, a second inverter circuit configured to control power supplied to a second motor stator, and a control unit portion including a calculation circuit.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: November 26, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Mitsuo Sasaki
  • Patent number: 10461665
    Abstract: A switch device for an electric motor includes at least one half-bridge having two semiconductor switches to energize at least one phase of the electric motor on demand. The switch device further includes a drive device assigned to the semiconductor switches and configured to actuate the semiconductor switches in accordance with an activation signal. The driver device includes an oscillator to generate an operating clock frequency, an apparatus to receive a synchronization signal, and a device to adjust the operating clock frequency in accordance with the synchronization signal.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: October 29, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Stefan Walz, Andreas Speinle, Markus Weber, Sylvia Wiedemann, Panagiotis Kosioris, Dirk Lamprecht, Alexander Krautstrunk
  • Patent number: 10446482
    Abstract: A semiconductor device includes a first contact receiving a first voltage, a second contact receiving a second voltage, one or more comparing elements comparing the first and second voltages, and one or more setting elements setting one or more parameters of the device in response to a comparison of the first and second voltages. When the first voltage is greater than the second voltage the setting element selects the first voltage as a high voltage, the second voltage as a low voltage, and sets a mode signal to a first value. When the second voltage is greater than the first voltage the setting element selects the first voltage as the low voltage, the second voltage as the high voltage, and sets the mode signal to a second value. The first and second values alter a condition of an electronic component coupled with the device between a first and second state.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: October 15, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Kentaro Iyoshi
  • Patent number: 10439525
    Abstract: A motor drive device includes a detecting unit that detects a rotational position of a rotor, a drive waveform generating circuit that generates a drive waveform, a control unit that synchronizes a phase of the rotational position of the rotor and a phase of the drive waveform, and a phase difference setting unit that sets a phase difference between the rotational position and the drive waveform during synchronization. An Apos generating unit calculates and outputs a position count proportional to a rotation amount of the rotor. A Bpos generating unit acquires the position count from the Apos generating unit and converts the count into a count value with the upper limit value as the maximum value. A Cpos generating unit multiplies the count value acquired from the Bpos generating unit by the conversion ratio, and calculates a count value with a predetermined upper limit value as the maximum value.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: October 8, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshihiro Mizuo, Nobuyuki Horie
  • Patent number: 10381959
    Abstract: A motor control device includes: an inverter circuit including a semiconductor switching element for drive which drives a motor; a cut-off circuit including a semiconductor switching element for cut-off which cuts off an electric connection between the motor and the inverter circuit; a failure detection unit; a rotation number detection unit; and a control unit. In a case where the failure detection unit detects a failure of the semiconductor switching element for drive, the control unit turns off the semiconductor switching element for drive, and in a case where the number of rotations of the motor which is detected by the rotation number detection unit is less than a predetermined first threshold, the control unit further turns off the semiconductor switching element for cut-off.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: August 13, 2019
    Assignee: OMRON AUTOMOTIVE ELECTRONICS CO., LTD.
    Inventors: Taiki Yamane, Toshio Saito
  • Patent number: 10355631
    Abstract: A current regulator is provided for an electric machine drive system for driving an electric machine. The current regulator is configurable to operate in a first configuration or a second configuration depending on a synchronous speed of the electric machine. A controller can configure an operational mode of the current regulator by selecting, based on the synchronous speed of the electric machine, either the first configuration of the current regulator or the second configuration of the current regulator as a currently active configuration, and can then execute the current regulator in accordance with the currently active configuration. The first configuration of the current regulator comprises a first set of elements and cross-coupling gain blocks, whereas the second configuration of the current regulator can include the first set of elements without the cross-coupling gain blocks.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: July 16, 2019
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Caleb W. Secrest, Brent S. Gagas, Dwarakanath V. Simili
  • Patent number: 10351142
    Abstract: In a hybrid vehicle, when an abnormality occurs in a first current sensor and a second current sensor during operation of an engine, a controller is configured to execute one-phase on control to a first inverter, and perform gate shutoff to a second inverter. The controller is configured to, in switching a target phase in the one-phase on control, when an electric angle of a first motor is within a switching range where an assumption is made that a torque difference between torque of the first motor before switching of the target phase and torque of the first motor after switching of the target phase becomes equal to or less than a predetermined value, switch the target phase.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: July 16, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takashi Fukaya, Shinjiro Ashida
  • Patent number: 10330500
    Abstract: The invention relates to an apparatus (7) for operating a resolver (1), which has at least one receiver winding (3, 4) or at least one excitation winding (2), which are/can be associated with a rotatably mounted shaft (5), in particular a rotor shaft of an electric motor, said apparatus also having a device (9) which determines an angular position of the shaft (5) as a function of an induced voltage detected by the excitation winding (2) by means of a desired excitation signal (SES) with a predeterminable frequency and amplitude and by the receiver winding (3, 4). According to the invention, means (10) for limiting an electrical voltage on the excitation winding (2) are associated with the excitation winding (2), wherein the means (10) limit the voltage only above a maximum normal voltage in only one current direction.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 25, 2019
    Assignee: Robert Bosch GmbH
    Inventors: Edwin Eberlein, Manfred Kirschner
  • Patent number: 10333438
    Abstract: The present disclosure provides a motor driving circuit, which includes a position detecting circuit, a drive processing circuit, an adjusting voltage source, a parameter reading unit and a timing unit. The timing unit generates a timing signal, and the parameter reading unit processes the timing signal to obtain a consecutive first time interval and a second time interval. The parameter reading unit reads a first functional parameter voltage of a functional parameter pin in the first time interval and generates first functional parameter data to be written into a first register, and reads a second functional parameter voltage of a functional parameter pin in the second time interval and generates second functional parameter data to be written into a second register. The drive processing circuit drives a motor according to the first functional parameter data and the second functional parameter data.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: June 25, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, Ching-Feng Lai
  • Patent number: 10270378
    Abstract: A method for monitoring a PSM machine having three phases including detecting whether one or more current sensors disposed on a phase of the machine has malfunctioned. If a malfunction is detected, a voltage indicator is calculated from a voltage amplitude and a voltage phase of an input voltage of the machine in a d, q-coordinate system by two different calculations. The first calculation includes calculating the input voltage based on a phase current, target currents, and an electrical angle of the machine. The second calculation includes calculating the input voltage based on target values of a reference voltage amplitude and a reference voltage phase. The method also includes determining the voltage amplitude and the voltage phase of the input voltage of the machine and comparing the values of the respective voltage amplitudes and voltage phases from the input voltage in the first and second calculations.
    Type: Grant
    Filed: December 16, 2016
    Date of Patent: April 23, 2019
    Assignee: ZF Friedrichshafen AG
    Inventor: Hassan Lamsahel
  • Patent number: 10241130
    Abstract: A method for detecting failure of speed measurement of a multi-phase AC motor includes (1) sensing current drawn by the motor, (2) sensing voltage magnitude supplied to the motor, (3) measuring motor speed, (4) calculating motor speed, (5) determining whether the difference between the measured motor speed and the calculated motor speed is greater than a predetermined threshold, if the difference between the measured motor speed and the calculated motor speed is not greater than a predetermined threshold, repeating (1) through (5), if the difference between the measured motor speed and the calculated motor speed is greater than a predetermined threshold, indicating a fault, if a fault is indicated, performing a predetermined number of restart attempts, if the motor is successfully restarted, repeating (1) through (5), if the motor is not successfully restarted, indicating a restart failure.
    Type: Grant
    Filed: August 17, 2016
    Date of Patent: March 26, 2019
    Assignee: Microsemi SoC Corporation
    Inventors: Prakash Reddy, Ashwin Murali, Pinninti Arjun
  • Patent number: 10230320
    Abstract: Provided is a motor drive device capable of adjusting a 0-axis current to a desired value. A motor drive device (inverter device 100) for an open winding type motor 200 in which a stator winding wire includes three-phase independent winding wires 210, 220, and 230 includes a plurality of single-phase inverters 160, 170, and 180 provided for each of the winding wires 210 to 230 to individually apply a voltage to a corresponding winding wire, and a controller 150 that controls each of the single-phase inverters 160 to 180. The controller 150 adjusts a 0-axis current to a predetermined value by alternately and repeatedly generating a first period in which a sum of voltages applied to the respective independent winding wires 210 to 230 is set to a value other than zero to offset the 0-axis current and a second period in which the sum of the voltages applied to the respective winding wires 210 to 230 is set to zero.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: March 12, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshisada Mitsui, Hideki Miyazaki, Seigo Yukutake, Katsuhiro Hoshino
  • Patent number: 10224909
    Abstract: Disclosed are an error elimination amplifier and a motor control circuit using the same. The error elimination amplifier includes an amplification circuit, a switching circuit, a comparison circuit, an output comparator and a calibration circuit. The comparison circuit includes a first comparator and a second comparator. The switching circuit and the first input end of the output comparator are electrically connected to a signal output end of the amplification circuit. A second input end of the output comparator is coupled to a reference voltage. The calibration circuit is electrically connected to the amplification circuit. An offset of the amplifier is eliminated through the amplification circuit, the switching circuit and the calibration circuit.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: March 5, 2019
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Ming-Jung Tsai, Kun-Min Chen
  • Patent number: 10218302
    Abstract: To provide a controller and a control method for an electric motor including plural energization systems each composed of an inverter and coils corresponding to plural phases. The controller performs first diagnosis processing for detecting an abnormality in each system under energization control, and second diagnosis processing for detecting an abnormality in each system not under energization control. When the first diagnosis processing detects an abnormality in one system and the second diagnosis processing detects no abnormality in the one system or when the first diagnosis processing detects an abnormality in one system to thereby stop energization control over the one system and in such a state, an abnormality is detected in another system, the energization control over the one system is restarted to drive the electric motor. It is therefore possible to avoid stopping output from a normal system when some of the systems have an abnormality.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: February 26, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonobu Koseki, Tomishige Yatsugi
  • Patent number: 10179575
    Abstract: Disclosed herein is an electronic brake system using an integrated sensor, which includes a hydraulic block configured to distribute and supply a fluid to a wheel brake, and having a through-hole penetrated at both sides thereof, a sensor module installed at one side of the hydraulic block having the through-hole, for sensing a linear displacement of a brake pedal and a position of a motor, and an electronic control unit installed to a side of the hydraulic block opposite to the sensor module, in order to determine a movement distance of the pedal, based on the linear displacement of the pedal sensed by the sensor module, and control rotation of the motor depending on the linear displacement of the pedal.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: January 15, 2019
    Assignee: Lucas Automotive GmbH
    Inventors: Sung Hwan Shin, Min Seok Kwon
  • Patent number: 10171018
    Abstract: A method for detecting stall of a multiphase motor operated in a sinusoidal micro-stepped mode. The method comprises: a) measuring at least one phase current and/or measuring the sum of all phase currents at regular time intervals synchronous with the micro-steps, b) calculating the difference between the measured phase current at a first moment and the measured phase current of the same phase at a previous moment and/or the difference between the measured sum of all phase currents at a first moment and the measured sum of all phase currents at a previous synchronous moment, c) analyzing the series of obtained current differences so as to generate a stall detection signal.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: January 1, 2019
    Assignee: MELEXIS TECHNOLOGIES NV
    Inventors: Marcel Jakobus Gerardus Braat, Marc Lambrechts
  • Patent number: 10158311
    Abstract: An electronic switch control method is disclosed. The method comprises receiving the current working parameters of the electronic switch, then reading duty cycle parameters matching with the current working parameters; conducting a linear calculation with the duty cycle parameters and the working parameters to obtain a new duty cycle; adjusting the current control signal to obtain a PWM signal having the new duty cycle; and controlling the rotation speed of the motor in a load with the PWM signal. By reducing the volume of an electronic switch and achieving a long low-speed travel, the disclosure enables the user to work at an accurate working point with an electronic device.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: December 18, 2018
    Assignee: Shanghai Baicheng Electric Equipment Manufacture CO., LTD.
    Inventor: Zhengbing Liu
  • Patent number: 10126800
    Abstract: Electronic architecture (3) for controlling a DC/AC voltage converter (2), said converter (2) comprising a plurality of arms mounted in parallel, each arm comprising two controllable switching cells (21), in series and separated by a mid-point, the arms being paired in H-bridges (20), the architecture (3) comprising: —a main control unit (36), configured to communicate through a potential barrier (61) with a remote control unit (35), and —a plurality of secondary control units (37), each secondary control unit (37) being dedicated to controlling a respective H-bridge (20), and comprising: —a processing unit (40) for processing the information received from the main control unit (36), and —a monitoring unit (41) for monitoring the controllable switching cells (21) of said H-bridge (20), said monitoring unit (41) being configured to modify the state of all or some of said switching cells (21) of said H-bridge (20) at least on the basis of information received from the corresponding processing unit (40).
    Type: Grant
    Filed: April 24, 2014
    Date of Patent: November 13, 2018
    Assignee: Valeo Systemes de Controle Moteur
    Inventor: Guillaume Caubert
  • Patent number: 10116249
    Abstract: A powertrain for a vehicle includes a wye wound electric machine and a controller. The electric machine is coupled with an inverter. The controller is configured to, in response to an electrical connection between the vehicle and an AC grid, couple a capacitor between a neutral terminal of the electric machine and a negative terminal of the inverter to absorb reactive power from the AC grid.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: October 30, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Ke Zou, Chingchi Chen
  • Patent number: 10075107
    Abstract: A method and apparatus are provided for detecting a rotor lock condition in a sensorless permanent magnet synchronous motor. A BEMF observer determines an estimated rotor speed {circumflex over (?)} and a first BEMF voltage value in an estimated rotor-related ?,? reference frame. In addition, a second estimated BEMF voltage value is calculated in a rotor-related d,q reference frame based on at least a first motor constant and an estimated rotor speed {circumflex over (?)}. After generating a BEMF error filter value from the first and second estimated BEMF voltage values and calculating a BEMF error threshold value as a function of the estimated rotor speed {circumflex over (?)} that is subject to a minimum threshold BEMF value, a rotor lock condition is detected based on at least the BEMF error filter value and the BEMF error threshold value.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: September 11, 2018
    Assignee: NXP USA, Inc.
    Inventors: Jaroslav Lepka, Libor Prokop
  • Patent number: 10066967
    Abstract: A method for detecting rotor position for a single coil DC motor or 2-coil DC motor with non-parallel windings, with no need of Hall position sensor. The method comprises applying a first respectively second probe pulse for generating a first response pulse having a first direction or polarity and a second response pulse having a second direction or polarity. The probe pulses are adapted so they do not substantially move the rotor with respect to the stator, but affect the magnetic properties of the stator. By comparing the measured effects caused by the probe pulses, the initial position of the rotor with respect to the stator is determined. A method for start-up, a motor driver circuit, and a motor assembly comprising said motor and driver circuit are also provided.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: September 4, 2018
    Assignee: MELEXIS TECHNOLOGIES NV
    Inventors: Dirk Leman, Marc Lambrechts, Zuo Xing, Zhang Huowen
  • Patent number: 10053086
    Abstract: A hybrid vehicle includes an engine, a first rotating electrical machine (first MG), a second rotating electrical machine (second MG), a planetary gear mechanism which mechanically couples these devices, a first inverter which drives the first MG, a second inverter which drives the second MG, and a controller. When the controller receives a fail signal from the first inverter, the controller performs shut-down control which brings the first inverter into a gate shut-down state with fuel supply to the engine being stopped. When the absolute value of an engine rotation speed Ne is more than or equal to a predetermined value ? and the absolute value of a rotation speed Nm1 of the first MG is less than a threshold value ? after the shut-down control is started, the controller determines that the first inverter has a short-circuit fault.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: August 21, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoko Oba, Shohei Oi, Atsushi Nomura
  • Patent number: 10053147
    Abstract: A steered-angle command value calculation circuit calculates a steered-angle command value by adding a steering torque to a first assist component that is a sum of a basic assist control amount, a hysteresis control amount and a damping control amount. A steered-angle feedback control circuit calculates a second assist component by angle feedback control based on the steered-angle command value. A compensation control circuit generates the hysteresis control amount and the damping control amount based on a determination flag generated by a hand release determination circuit and indicating whether or not the steering state corresponds to a hand release state. The hand release determination circuit determines whether or not the steering state corresponds to the hand release state based on signs of a steering angle calculated by a steering-angle calculation circuit, a steering angular velocity that is a differential value of the steering angle, and a steering angle acceleration.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: August 21, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Shigeto Matsuo, Terutaka Tamaizumi
  • Patent number: 10044314
    Abstract: A motor apparatus and a motor driving circuit are provided. The motor apparatus includes a motor module and the motor driving circuit. The motor driving circuit includes a plurality of bridge arm circuits, a temperature sensor, and a control circuit. Each of the bridge arm circuits is controlled by one of the first PWM signals and one of the second PWM signals generated by the control circuit and outputs a driving signal to drive the motor module. The temperature sensor senses a temperature of the bridge arm circuits and provides a temperature sensing value to the control circuit. When the temperature sensing value is greater than or equal to a threshold temperature value, the control circuit increases a duty cycle of the first PWM signal of one bridge arm circuit and a duty cycle of the second PWM signal of the other bridge arm circuits to lower the temperature.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: August 7, 2018
    Assignee: FAIRWAY ELECTRONIC CO., LTD.
    Inventor: Lin-Han Yen
  • Patent number: 10044298
    Abstract: A rotating electric machine drive system includes a rotating electric machine and a drive apparatus. The rotating electric machine includes a Y-connected three-phase stator coil. The drive apparatus supplies electric current to the stator coil and thereby drives the rotating electric machine. In a predetermined high-torque region, the drive apparatus supplies the stator coil with the electric current which has a waveform obtained by superimposing a specific harmonic waveform on a first-order harmonic waveform. The specific harmonic waveform is one of third-order and (3+6n)th-order harmonic waveforms, or a harmonic waveform which is obtained by synthesizing at least two of the third-order and (3+6n)th-order harmonic waveforms, where n is a natural number not less than 1. The specific harmonic waveform takes a negative integral value for a positive half cycle of the first-order harmonic waveform and a positive integral value for a negative half cycle of the first-order harmonic waveform.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: August 7, 2018
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 9859794
    Abstract: A semiconductor device includes a first switching element, a pre-driver, a coil, a second switching element and a capacitor. The first switching element is connected between a power and a load driving circuit and includes a parasitic diode having cathode adjacent to the load driving circuit. The pre-driver drives the first switching element. The coil is connected between the power and the first switching element. The second switching element includes an output terminal connected to a first connection point between the power and the coil, an input terminal connected to a second connection point between the first switching element and the pre-driver, and a control terminal connected to ground. The capacitor has one end connected to a point between the first switching element and the load driving circuit and another end connected to ground. Even when power supply voltage decreases, the semiconductor device can restrict breakage of switching element.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: January 2, 2018
    Assignee: DENSO CORPORATION
    Inventors: Hiroyuki Miyaki, Yutaka Ohashi
  • Patent number: 9793835
    Abstract: Provided is a power conversion device, including a fault determination unit (11) for determining, based on phase voltages of a polyphase dynamo-electric machine (4) detected by phase voltage detection units (10), a power, earth, or open fault of armature windings of the polyphase dynamo-electric machine (4). The fault determination unit (11) determines, in a state that all power semiconductor switching elements (2) are in an off state and no induction voltage is generated in the armature windings of the polyphase dynamo-electric machine (4), the power fault when all the phase voltages are substantially equal to an anode potential of a DC power supply (3), the earth fault when all the phase voltages are substantially equal to a cathode potential of the DC power supply (3), and the open fault when all the phase voltages are not substantially the same potential.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: October 17, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenichi Fujie, Katsuya Tsujimoto, Takamasa Asai
  • Patent number: 9787240
    Abstract: To provide a controller and a control method for a motor equipped with a plurality of energization systems each including a coil set of coils corresponding to a plurality of phases and an inverter for outputting a current to each of the phases in the coil set. The controller stops the inverter of a first energization system if the total phase current in the first energization system is an outlier. During a predetermined period after stopping the inverter of the first energization system, even if the total phase current in any other energization system is an outlier, the controller continues to operate the inverter of the other energization system. This makes it possible to continue to operate the inverter of a normal energization system as required as possible while stopping the inverter of an energization system having an abnormality such as a short-circuit or short-to-ground.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: October 10, 2017
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonobu Koseki, Tomishige Yatsugi
  • Patent number: 9725054
    Abstract: The invention relates to a method for monitoring a component (12), in particular a battery, of a motor vehicle having a first control unit (14) for monitoring the component (12) and a second control unit (16) for monitoring the component (12), wherein the second control unit (16) is arranged at a distance from the first control unit (14) and communicates with the first control unit (14), wherein the second control unit (16) is connected to the component (12) via a line (20), in particular a hardware line, comprising the steps of transmitting operating data to the first control unit (14) by means of the second control unit (16), checking the operating data in the first control unit (14), transmitting data from the first control unit (14) to the second control unit (16), switching off the component (12) by means of the second control unit (16) if interference is detected by means of the first control unit (14) and/or the second control unit (16).
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: August 8, 2017
    Assignee: Robert Bosch GmbH
    Inventors: Thomas Rupp, Stefan Cermak, Jens Werneth
  • Patent number: 9722415
    Abstract: A safety device for an actuator that can modulate power to an electric motor in response to a fault condition (e.g., stall). In one embodiment, the actuator can include a motor with a shaft, a sensor disposed in proximity to the shaft, and a control processor coupled with the sensor and the motor. The control processor can be configured to receive a signal from the sensor that conveys operating data that relates to rotation of the shaft, use the operating data to identify a fault condition on the motor, and change the motor from an energized condition to a de-energized condition in response to the fault condition.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: August 1, 2017
    Assignee: Dresser, Inc.
    Inventor: Andrew Logan Perkins
  • Patent number: 9669812
    Abstract: A microcomputer o n EPS performs failure diagnosis of a motor or a motor driving circuit after an ignition switch is turned on and before an ECU starts control of power supply to the motor. When an angular velocity of the motor rotatable with a steering wheel is greater than a predetermined value, the failure diagnosis is not made. Thus, a period from the turn-on of the ignition switch to the start of current supply control is shortened.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: June 6, 2017
    Assignee: DENSO CORPORATION
    Inventor: Yoshihide Kuroda
  • Patent number: 9654037
    Abstract: A multi-phase motor control method controls a multi-phase motor which includes multiple nodes respectively receiving a corresponding number of driving voltage signals to control a rotation of a rotor. The motor control method includes: sensing a signal phase of a current signal corresponding to at least one node, for example by sensing a zero-crossing point of the current signal; determining a reference phase for the current signal; calculating a phase difference between the signal phase and the reference phase; and controlling a phase switching frequency of the stator according to the phase difference, such that the signal phase is close to or in phase with the reference phase, to thereby obtain an optimum rotation speed of the rotor corresponding to a given driving voltage. The present invention also provides a multi-phase motor control device using the motor control method.
    Type: Grant
    Filed: August 18, 2014
    Date of Patent: May 16, 2017
    Assignee: RICHTEK TECHNOLOGY CORPORATION
    Inventors: Kuo-Chung Lee, Wei-Hsu Chang, An-Tung Chen, Chun-Wen Wang
  • Patent number: 9577568
    Abstract: A method recognizes a wire-break fault during operation of a brushless DC motor. A switch-on delay duration of a transition of an electrical phase potential that rests on the stator winding phase from a switch-off potential to a switch-on potential and a switch-off delay duration of the transition of the phase potential from the switch-on potential to the switch-off potential are detected for a stator winding phase of the stator winding of the motor during each pulse width modulation cycle period. Moreover, a lower deviation limit is defined for a deviation of detected switch-off delay durations from detected switch-on delay durations. A wire-break fault is deduced if the deviations of the detected switch-off delay durations from the detected switch-on delay durations fall below the lower deviation limit.
    Type: Grant
    Filed: May 28, 2014
    Date of Patent: February 21, 2017
    Assignees: Conti Temic Microelectronic GmbH, Continental Automotive GmbH
    Inventors: Robert Istvan Loerincz, Andreas Schnell
  • Patent number: 9571016
    Abstract: A motor control system is disclosed. The motor control system includes a level-shifting unit, a motor unit and a control unit. The level-shifting unit receives an original pulse width modulation (PWM) signal to generate an output PWM signal. When a first high level of the original PWM signal is larger than a first reference value, the level-shifting unit shifts a second high level of the output PWM signal to a set high level. When a first low level of the original PWM signal is lower than a second reference value, the level-shifting unit shifts a second low level of the output PWM signal to a set low level. The control unit controls the speed of the motor according to the output PWM signal.
    Type: Grant
    Filed: July 14, 2014
    Date of Patent: February 14, 2017
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Chia-Hao Chang, Yueh-Lung Huang, Yen-Hung Chen, Shih-Yuan Chiang, Feng-Ying Lin
  • Patent number: 9564841
    Abstract: Provided is a power conversion device, including a fault determination unit (11) for determining, based on phase voltages of a polyphase dynamo-electric machine (4) detected by phase voltage detection units (10), a power, earth, or open fault of armature windings of the polyphase dynamo-electric machine (4). The fault determination unit (11) determines, in a state that all power semiconductor switching elements (2) are in an off state and no induction voltage is generated in the armature windings of the polyphase dynamo-electric machine (4), the power fault when all the phase voltages are substantially equal to an anode potential of a DC power supply (3), the earth fault when all the phase voltages are substantially equal to a cathode potential of the DC power supply (3), and the open fault when all the phase voltages are not substantially the same potential.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: February 7, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenichi Fujie, Katsuya Tsujimoto, Takamasa Asai
  • Patent number: 9509242
    Abstract: A method for operating a direct current (DC) motor is shown and described. The method includes generating a first pulse width modulated (PWM) signal having a first duty cycle, providing the first PWM signal as a PWM DC output for the DC motor, and adjusting the first duty cycle to control a speed of the DC motor. The method further includes sensing an electric current output to the motor using a current sensor and, when the sensed current exceeds a threshold, holding the PWM DC output off.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: November 29, 2016
    Assignee: Johnson Controls Technology Company
    Inventors: Russell W. Diamond, Gary A. Romanowich, David R. Fuhr
  • Patent number: 9410792
    Abstract: A resolver device (14) includes: a microcomputer (1) for outputting a control signal for driving a motor (4) to a drive circuit (3); a sensor section (5) (resolver) for outputting detection values (a sine signal and a cosine signal) in accordance with a rotation angle of the motor (4); and a signal circuit (13) provided between the microcomputer (1) and the sensor section (5). The microcomputer (1) determines an abnormality when the detection values of the sensor section (5) are out of a first normal range and then determines return of the sensor section (5) to normal when the detection value is present within a second normal range and in a plurality of regions obtained by dividing the first normal range.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: August 9, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takayuki Yamamoto, Shunichi Wada, Katsuya Ikemoto, Chiaki Fujimoto
  • Patent number: 9392732
    Abstract: An electronic control unit is equipped with a semiconductor module having a semiconductor chip electrically connected to the first circuit pattern and the second circuit pattern. A resin body is wrapped around the semiconductor chip. A first metal plate has a side connected to the semiconductor chip and an other side connected to the first circuit pattern. A radiator projects toward and is connected to the first circuit pattern by a first heat conductor. As a result, heat generated by the semiconductor chip is transmitted to the radiator through the first metal plate, the first circuit pattern, and the first heat conductor during operation of the semiconductor module.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: July 12, 2016
    Assignee: DENSO CORPORATION
    Inventors: Yoshimichi Hara, Toshihisa Yamamoto, Takahiro Yamanaka
  • Patent number: 9290106
    Abstract: A power control system includes a battery, a converter which converts a direct-current voltage of the battery to a different level of direct-current voltage by the switching of switching elements, a second inverter, a second MG which is an electric motor, an engine, and an ECU which is a controller. When there is a warm-up request for the battery, the ECU causes a carrier frequency in the switching control of the switching elements to be lower than a carrier frequency in the case where there is no warm-up request for the battery. When there is a warm-up request, the ECU causes the carrier frequency at which the engine is in operation to be lower than the carrier frequency at which the engine is out of operation.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: March 22, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Ryoji Sato