Constant Motor Current, Load And/or Torque Control Patents (Class 318/432)
  • Patent number: 11338844
    Abstract: An electric power steering apparatus includes a high-frequency compensation unit that outputs a high-frequency compensation signal obtained by filtering the high-frequency components of an assist torque command signal and multiplying the filtered high-frequency components by a gain; a corrected steering torque signal obtained by negatively or positively feeding back the high-frequency compensation signal to a steering torque signal is inputted to an assist torque command calculation unit; the assist torque command calculation unit outputs the assist torque command signal in accordance with the corrected steering torque signal.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: May 24, 2022
    Assignee: Mitsubishi Electric Cornoration
    Inventors: Isao Kezobo, Kenta Tanaka, Masaharu Tanaka, Akiyoshi Takashima
  • Patent number: 11312355
    Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that the average torque output by the engine is constant, to set the countertorque such that, as an engine speed of the engine becomes larger, the absolute value of the countertorque becomes larger.
    Type: Grant
    Filed: February 23, 2018
    Date of Patent: April 26, 2022
    Assignee: Mazda Motor Corporation
    Inventors: Yuta Enokizono, Hirofumi Nishimura, Tsuyoshi Goto, Kentaro Furusho, Wataru Yamamoto
  • Patent number: 11304862
    Abstract: A control device for a power assist wheelchair which includes a compensation turning torque calculation unit that calculates a compensation turning torque value for compensating for at least a part of the shortage or excess of the actual turning torque value with respect to the predicted turning torque value, in which the compensation turning torque value is smaller when the vehicle speed is a first speed than when the vehicle speed is a second speed faster than the first speed; a first target current determination unit that determines a target current of the first electric motor based upon the first manual torque value and the compensation turning torque value; and a second target current determination unit that determines a target current of the second electric motor based upon the second manual torque value and the compensation turning torque value.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: April 19, 2022
    Assignee: YAMAHA HATSUDOKI KABUSHIKI KAISHA
    Inventors: Masamitsu Mizuno, Masanori Yonemitsu
  • Patent number: 11286133
    Abstract: An elevator system includes a component adapted to perform a function, a sensor, and a control configuration. The sensor is configured to detect an operating parameter associated with the function. The control configuration is configured to receive a parameter signal from the sensor, and extract a predesignated feature from data associated with the parameter signal. The predesignated feature is then aggregated by the control configuration and machine learning is applied to determine a degradation level of the function associated with the predesignated feature.
    Type: Grant
    Filed: July 9, 2018
    Date of Patent: March 29, 2022
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: Nikola Trcka, Teems E. Lovett, Sandeep Sudi, Paul R. Braunwart, Sudarshan N. Koushik, Peter Liaskas
  • Patent number: 11290049
    Abstract: A method for controlling a motor-driven pump in communication with a fluid system is provided. Preferably the method employs a frequency drive system to control the motor-driven pump. The control method is characterized in that the operating frequency of the motor can be adjusted very quickly and it is ensured to be operated in a safe frequency range no more than a rated current.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: March 29, 2022
    Inventor: Chuh Hwa Luh
  • Patent number: 11278155
    Abstract: The present invention relates to a method for operating a food processor, where at least one processing device of the food processor is controlled, in a preparation mode, so as to at least partially automatically prepare food, and where a monitoring device performs an identification of temporally successive acquisition values at the food processor at least during the preparation mode, where the acquisition values are specific to at least one preparation parameter of the food processor, where at least one analysis information is determined dependent upon the temporally successive acquisition values, and a frequency distribution of the analysis information is identified by a time-dependent analysis, whereby an analysis result specific to a preparation state is determined, where dependent upon the analysis result, at least one control signal is emitted for influencing the preparation mode.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: March 22, 2022
    Assignee: Vorwerk & Co. Interholding GmbH
    Inventors: Wenjie Yan, Maximilian Könnings, Maria Resende
  • Patent number: 11267093
    Abstract: There are described methods and system for managing machine tool maintenance. The method comprises assessing health data for the machine tool over health assessment cycles, the health data indicative of a performance of the machine tool; triggering first level maintenance events on the machine tool when the health data falls outside of a tolerance; modulating a time interval between the health assessment cycles as a function of an occurrence of first level maintenance events, wherein the time interval is reduced after first level maintenance events and increased after a given number of consecutive health assessment cycles without first level maintenance events; and triggering second level maintenance events on the machine tool when second level maintenance event conditions are met.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: March 8, 2022
    Assignee: PRATT & WHITNEY CANADA CORP.
    Inventors: Mario Blais, Mizanur Rahman
  • Patent number: 11268694
    Abstract: A motor controller for a draft inducer motor that operates an inducer blower in a furnace is provided. The motor controller includes a communication interface operable to receive a signal from a system controller. The signal represents a command to operate the draft inducer motor. The motor controller includes a processor operable to operate the draft inducer motor in accordance with a predefined motor speed profile during at least one of an ignition stage and a combustion stage of the furnace.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: March 8, 2022
    Assignee: Regal Beloit America, Inc.
    Inventors: Devan Scroggins, Paul Steven Mullin
  • Patent number: 11258381
    Abstract: A motor driving circuit for a single phase motor and a motor driving method for the same are provided. The motor driving circuit includes a motor driver, a Hall sensor, a Hall commutation detection circuit, a period recording circuit, a motor current detection circuit, a cut-off angle adjustment circuit, an angle calculation circuit and a control circuit. The motor current detection circuit detects a motor current value at a commutation point after the single phase motor operates normally. The cut-off angle adjustment circuit generates a cut-off angle adjustment signal indicating a cut-off adjustment angle according to the motor current value when the single phase motor passes the commutation point. The control circuit processes the commutation signal and the cut-off signal generated by the angle calculation circuit to generate a control signal group to control the motor driver to generate an output signal group to drive the motor.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: February 22, 2022
    Assignee: ANPEC ELECTRONICS CORPORATION
    Inventors: Kun-Min Chen, Ching-Shan Lu
  • Patent number: 11251742
    Abstract: A drive system includes at least one electrical machine and a plurality of rotating components, which are interconnected via shafts. A method for damping torsional oscillations in the drive system includes: determining angular speeds for at least one of the shafts based on measurements in the drive system; determining a damping torque from the angular speeds with a function that models at least some of the electrical machine, the rotating components and the shafts; adapting a reference torque for the at least one electrical machine by adding the damping torque; and controlling the at least one electrical machine with the adapted reference torques.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: February 15, 2022
    Assignee: ABB SCHWEIZ AG
    Inventors: Peter Al-Hokayem, Pieder Joerg
  • Patent number: 11236645
    Abstract: A valve timing controller includes: a driving-side rotation member synchronously rotating with respect to a crankshaft of an internal combustion engine; a driven-side rotation member disposed coaxially with a rotation axis of the driving-side rotation member, and rotating integrally with a camshaft of the engine; a phase setting mechanism setting a relative rotation phase between the driving-side and driven-side rotation members; a brushless motor driving the phase setting mechanism; a control portion controlling the brushless motor by electrifying an inverter having three sets of arm portions having high-side and low-side switching elements connected to each other in series between a first power supply line and a second power supply line connected to a potential lower than a potential of the first power supply line; and a command information acquisition section acquiring holding command information indicating a command for holding a rotor of the brushless motor in a non-rotating state.
    Type: Grant
    Filed: March 10, 2021
    Date of Patent: February 1, 2022
    Assignee: AISIN CORPORATION
    Inventor: Atsushi Yamamoto
  • Patent number: 11239783
    Abstract: Systems and methods for extracting motor operational state parameters from an electric motor for improved motor control and motor fault or failure detection are discussed. An exemplary system includes an excitation circuit to apply a drive voltage to an electric motor, and a processor circuit to measure a resulting winding current, extract a current waveform by oversampling the winding current in an entire PWM frame at a sampling rate higher than the PWM frequency, and fit the current waveform in the PWM period to a parametric model. The processor circuit can determine a motor operational state parameter using one or more of the applied drive voltage or the parametric model of the winding current.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: February 1, 2022
    Assignee: Analog Devices International Unlimited Company
    Inventors: Adam James Glibbery, Javier Calpe Maravilla
  • Patent number: 11239772
    Abstract: Systems and methods for robust control of a sensorless interior permanent magnet synchronous motor during severe operating conditions that causes motor parameter variation. A multi-model flux observer and a dynamic direct flux motor controller act in concert to generate driving commands. The flux observer transitions between providing flux-based rotor characteristic estimates based on different motor models. DHFI filtered currents can be utilized to obtain flux-based characteristic estimates using a motor magnetic model that are unaffected by motor parameter variations. The multi-model flux observer can be configured to transition between suitable estimation methods to reduce, minimize, or eliminate the effects of motor parameter variations.
    Type: Grant
    Filed: April 1, 2021
    Date of Patent: February 1, 2022
    Assignee: Wolong Electric Group Co. Ltd.
    Inventors: Radu Bojoi, Zheng Zhang, Ze Jiang
  • Patent number: 11208092
    Abstract: A powertrain system includes one or more torque devices associated with the control of the driving force of a vehicle, and a control device configured to control the one or more torque devices. The control device is configured to act as: a first manipulated variable determination section that solves a linear programming problem to determine, based on one or more linear state equations that define a relationship between one or more state quantities controlled by the powertrain system and one or more manipulated variables of the one or more torque devices, the one or more manipulated variables such that one or more target state quantities are maximally achieved within one or more constraints of the powertrain system; and a torque device control section that controls the one or more torque devices in accordance with the one or more manipulated variables determined by the first manipulated variable determination section.
    Type: Grant
    Filed: November 20, 2019
    Date of Patent: December 28, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yushi Shibaike
  • Patent number: 11211851
    Abstract: A motor drive utilizes redundant current feedback to monitor force being produced by a motor and to provide safe limited force producing operation of the motor. A first set of current sensors provides a first current measurement, and a second set of current sensors provides a second current measurement. The two current measurements are provided to two diverse force producing calculations, where each force producing calculation provides a value of the force produced by the motor. The motor drive compares the output of the two algorithms to each other. If the output of the two force producing calculations is the same, within an acceptable band, the controller continues operating as commanded. If the output of the two force producing calculations differs beyond the acceptable band, then the controller may generate a fault message provided back to a central controller, stop operation of the motor, or a combination thereof.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: December 28, 2021
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Arun K. Guru, Xiaobo Peng, Robert H. Schmidt, Aleksey Yegorov
  • Patent number: 11201576
    Abstract: In a motor driving apparatus including a DC power supply circuit of variable output voltage value, an inverter of variable frequency, and a connection switching device for selecting connection, switching of the connection switching device is performed in a state where an output voltage of the DC power supply circuit is increased, a rotational speed of a motor is increased, and a current flowing through the motor is made not greater than a predetermined threshold. For example, the switching of the connection switching device is performed in a state where the current through the motor is made zero. For example, the switching is performed in a state where the output voltage of the DC power supply circuit is set at a value corresponding to the rotational speed of the motor during the switching. It is possible to prevent increase in apparatus size and switch the connection of windings while the motor is rotating.
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: December 14, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shinya Toyodome, Kazunori Hatakeyama
  • Patent number: 11185993
    Abstract: The control device for controlling a robot having a force detector includes an input device, a display, a memory, and a processor. The processor executes a program to repeat receiving of an input via the input device, selecting of an object of operation objects based on the input, and displaying of the selected object a predetermined number of times to complete an object operation flow. The processor converts the completed object operation flow into a control program for controlling the operations of the robot. The display displays a selection for selecting whether an integrator is applied to a difference between time series target force and time series measuring force for a specific control direction. The processor receives an adjusting input via the input device for adjusting an integral gain of the integrator when a result of the execution of the control program is in a predetermined condition.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: November 30, 2021
    Inventor: Kaoru Takeuchi
  • Patent number: 11183962
    Abstract: There is provided a driving system including a motor; an inverter configured to drive the motor; a power storage device connected with the inverter via a power line; a smoothing capacitor mounted to the power line; a voltage sensor configured to detect a voltage of the smoothing capacitor; a current sensor configured to detect an electric current of each phase of the motor; and a control device configured to control the inverter, based on a detected value of the current sensor. The control device performs Fourier series expansion of a detected value of the voltage sensor to calculate an electrical first variation component of the voltage of the smoothing capacitor. The control device controls the inverter, such that the electrical first variation component of the voltage of the smoothing capacitor becomes equal to a value 0.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: November 23, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koji Irie, Hiroyuki Oyanagi, Toshifumi Yamakawa
  • Patent number: 11167744
    Abstract: Presented are model predictive control (MPC) systems, methods, and devices for regulating operation of hybrid powertrains. A method of controlling a hybrid powertrain includes a controller determining path plan data, including a vehicle origin, destination, and predicted path. Based on this path plan data, the controller estimates vehicle velocities for multiple rolling road segments of the predicted path and, based on the estimated velocities, determines an estimated power request—transmission input torque and/or vehicle axle torque—for each road segment. The controller calculates a minimum cost function such that total fuel consumption to generate the engine power output is minimized. Minimizing the cost function is subject to battery pack current limits and state of charge (SOC) terminal costs at the ends of the rolling road segments. Command signals are sent to the engine and motor to output engine and motor torque based on the calculated minimum cost function.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: November 9, 2021
    Assignees: GM Global Technology Operations LLC, Ohio State Innovation Foundation
    Inventors: Yue-Yun Wang, Yuxing Liu, Marcello Canova
  • Patent number: 11159115
    Abstract: A motor driving device that drives a motor with an alternating-current power converted from a direct-current power supply, includes an inverter that receives a pulse-width modulation signal and supplies the alternating-current power to the motor, and an inverter control unit that generates the pulse-width modulation signal and supplies the pulse-width modulation signal to the inverter. The inverter control unit reduces the number of pulses of the pulse-width modulation signal generated during a first period within one period of a mechanical angle of the motor to be lower than the number of pulses of the pulse-width modulation signal generated during a second period within the one period of the mechanical angle of the motor. The first period is a period during which a load torque is lower than a load torque during the second period.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: October 26, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koichi Arisawa, Kazunori Hatakeyama, Keisuke Uemura
  • Patent number: 11155297
    Abstract: An MDPS (Motor Driven Power Steering) system may include: a vehicle speed sensor configured to sense vehicle speed; a yaw rate sensor configured to sense a tilted state of the vehicle, and output a yaw rate value; a lateral acceleration sensor configured to sense lateral acceleration which acts in a lateral direction of the vehicle; and an MDPS controller configured to receive the vehicle speed, the yaw rate value and the lateral acceleration from the vehicle speed sensor, the yaw rate sensor and the lateral acceleration sensor, respectively, and calculate assist torque by estimating column torque.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: October 26, 2021
    Assignee: HYUNDAI MOBIS CO., LTD.
    Inventor: Tae Hong Kim
  • Patent number: 11150153
    Abstract: A torque-sensing and transmitting device is provided. The device includes a transmission body, two vibration-damping members, two inner casings, two outer casings, a first circuit board module, and a battery module. The two inner casings are disposed on a shaft of the transmission body, and a vibration-damping member is disposed between the inner casing and the shaft. The first circuit board module is disposed in one of the two inner casings, and the first circuit board module is covered by a vibration-damping layer. The battery module is disposed on the other inner casing, and the battery module is covered by a vibration-damping layer. With the configuration of the vibration-damping member and the vibration-damping layer, this device solves the problem of the first circuit board module and the battery module being damaged due to vibration.
    Type: Grant
    Filed: May 30, 2019
    Date of Patent: October 19, 2021
    Assignee: China Pneumatic Corporation
    Inventors: Hsiu-Feng Chu, Yu-Te Chu
  • Patent number: 11143427
    Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a motor configured to drive rotation of a fan, and an HVAC controller configured to control operation of the HVAC system. The HVAC controller is configured to determine an operating mode target value of the HVAC system, calculate an operating parameter target value of the motor based on the operating mode target value of the HVAC system and a control algorithm of the HVAC controller, and control operation of the motor toward or at the operating parameter target value.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: October 12, 2021
    Assignee: Johnson Controls Technology Company
    Inventors: Timothy J. Wilson, Joshua J. Yagy
  • Patent number: 11125197
    Abstract: The vehicle includes an engine comprising a crankshaft, a crankshaft position sensor (CKP) configured to generate a pulse signal corresponding to a rotation of the crankshaft, a battery, a hybrid starter generator (HSG) configured to start the engine based on a power of the battery and charge the battery, and a motor controller unit (MCU) configured to determine a rotation angle of the crankshaft based on the pulse signal received from the CKP, and control the HSG based on the determined rotation angle.
    Type: Grant
    Filed: February 7, 2020
    Date of Patent: September 21, 2021
    Assignees: Hyundai Motor Company, KIA Motors Corporation
    Inventors: Byunghwan Jung, Sukhyun Joo
  • Patent number: 11104344
    Abstract: A vehicle includes connecting/disconnecting mechanisms (20,30) disposed on power transmission paths between first rotating electric machines (3,4) mounted on the vehicle and an output shaft (12) that drives a wheel, a first rotating electric machine speed sensor (43,44) that detects a rotation speed of the first rotating electric machine (3,4) as a first rotation speed (Nm,Ng), and a wheel speed sensor (42) that detects a rotation speed of the wheel as a wheel speed (Nw).
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: August 31, 2021
    Assignee: MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Hironori Abe, Ryo Shimizu, Kota Nasu
  • Patent number: 11101756
    Abstract: A motor control unit that vector-controls a 3-phase brushless motor based on a d-axis voltage command value and a q-axis voltage command value via an inverter with feedback-controlling, comprises: a central processing unit which comprises: a dq-axes dead time compensating section to calculate dq-axes dead time compensation values of the inverter and perform a dead time compensation; and a dq-axes disturbance estimating observer to input a d-axis current command value, a q-axis current command value, a motor rotational number, a motor angular velocity, a d-axis feedback current, a q-axis feedback current, the d-axis voltage command value and the q-axis voltage command value and calculate a d-axis disturbance compensation value and a q-axis disturbance compensation value, which cannot be compensated by the dead time compensation, by respectively adding the d-axis disturbance compensation value and the q-axis disturbance compensation value to the d-axis voltage command value and the q-axis voltage command value.
    Type: Grant
    Filed: January 29, 2019
    Date of Patent: August 24, 2021
    Assignee: NSK LTD.
    Inventors: Hiroaki Takase, Ryo Minaki, Takayoshi Sugawara
  • Patent number: 11098928
    Abstract: A speed estimation apparatus for an AC motor includes a model deviation calculation unit, first and second angular velocity estimation units, and an adder. The deviation calculation unit calculates a model deviation based on a voltage, a current, and an estimated angular velocity of the motor. The first angular velocity estimation unit calculates a first estimated angular velocity as a low-frequency component including a DC component of a real angular velocity based on the model deviation. The second angular velocity estimation unit calculates a second estimated angular velocity as a high-frequency component of a real angular velocity based on a specific high-frequency component of the model deviation. The adder adds the first and second estimated angular velocities together. An addition value of the first and second estimated angular velocities is fed back as the estimated angular velocity to the deviation calculation unit.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: August 24, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kenji Takahashi, Koichi Arisawa, Mitsuo Kashima
  • Patent number: 11097772
    Abstract: [Problem] An object of the present invention is to provide a vector control type motor control unit that compensates a dead time of an inverter without a tuning operation, improves a distortion of a current waveform and responsibility of the current control, and suppresses sound, vibration and a torque ripple.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: August 24, 2021
    Assignee: NSK LTD.
    Inventors: Hiroaki Takase, Ryo Minaki, Hideki Sawada, Takayoshi Sugawara
  • Patent number: 11081982
    Abstract: A motor assembly including a motor and a control circuit board. The motor includes a housing, a stator assembly, a rotating shaft, and a rotor assembly. The control circuit board includes a first electric wire, a second electric wire, a detection wire, a ground wire, a power supply circuit, a control circuit, and a detection circuit. The first electric wire and the second electric wire are connected to the commercial AC electric supply, and the detection wire detects whether or not a load connected to the motor is electrified. The first electric wire and the second electric wire are connected to the input terminals of the power supply circuit. The detection circuit is disposed between the detection wire and the ground wire. The detection circuit transmits a detection signal to the control circuit, and the control circuit controls the motor to rotate at various rotation speeds.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: August 3, 2021
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD.
    Inventors: Wenqing Bian, Yuanyao Wu
  • Patent number: 11038444
    Abstract: A motor drive circuit provides a drive signal to an electronically commutated motor. A control circuit the motor drive circuit based on calibration data. The calibration data indicate a relationship between an actual angular position of a rotor of the motor in response to the drive signal and an expected angular position of a rotor of an ideal motor in response to the drive signal.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: June 15, 2021
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Thomas Hafner, Leo Aichriedler, Gerald Wriessnegger
  • Patent number: 11028844
    Abstract: A controller for operating a rod pumping unit at a pump speed. The controller includes a processor configured to operate a pump piston of the rod pumping unit at a first speed. The processor is further configured to determine a pump fillage level for a pump stroke based on a position signal and a load signal. The processor is further configured to reduce the pump speed to a second speed based on the pump fillage level for the pump stroke.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: June 8, 2021
    Assignee: Ravdos Holdings Inc.
    Inventors: Omar Al Assad, Rogier Sebastiaan Blom, Gary Hughes, Justin Edwin Barton, Peter Westerkamp
  • Patent number: 11031897
    Abstract: A modulation routine in a motor drive under lightly loaded conditions which prevents DC bus voltage pump-up includes both active states and zero states. In a first zero state, each phase of the motor is connected to a negative rail of the DC bus, and in a second zero state, each phase of the motor is connected to a positive rail of the DC bus. When motor is lightly loaded or unloaded such that DC bus voltage pump-up may occur, the two zero states are utilized in an uneven manner. The specific division of the zero state between the first and second zero states may be selected in a manner that prevents the DC bus voltage pump-up from occurring.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: June 8, 2021
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Peter K. Meyer, Gennadi Sizov, Zoran Vrankovic, Gary L. Skibinski
  • Patent number: 11018615
    Abstract: A motor drive device includes an inverter to apply power to a motor, and a plurality of relays to switch a connection state of the motor by each switching its state between a first state and a second state. A timing at which at least one of the plurality of relays switches from the first state to the second state is different from a timing at which the other relays switch from the first state to the second state.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: May 25, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuta Tokuda, Kazunori Hatakeyama
  • Patent number: 11012013
    Abstract: According to one embodiment, there is provided a control device including a drive circuit and a control circuit. The drive circuit includes a plurality of transistors and a current determination circuit. The plurality of transistors is electrically connected in parallel to each other between a first node and a second node. The first node is connected to a power supply circuit. The second node is connected to a DC motor. The current determination circuit determines a current flowing between the first node and the second node. The control circuit generates a control signal to control a number of transistors to be turned on among the plurality of transistors in accordance with the determined current. The drive circuit drives the DC motor using a current in response to the control signal.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: May 18, 2021
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
    Inventor: Hideki Kimura
  • Patent number: 11008037
    Abstract: A steering application executing on a vehicle control module receives a steering control input to control a steered wheel of a vehicle and, based on the steering control input, determines a setpoint value for the steered wheel. A diagnostic supervisor receives a measured value of the control attribute and the setpoint value; wherein the first diagnostic supervisor comprises a first model of a steering system of the vehicle. Based on the setpoint value and the first model, the diagnostic supervisor calculates a virtual value of the control attribute and, based on the virtual value and the measured value of the control attribute the first diagnostic supervisor determines an operating condition of the steering system of the vehicle.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: May 18, 2021
    Assignee: Crown Equipment Corporation
    Inventors: Stephen T. Mangette, Brent A. Barnhart
  • Patent number: 11005402
    Abstract: A control device for a motor, comprising: a power converter for performing ON/OFF control on an upper switching element and a lower switching element in accordance with a drive command from a current controller, and thereby supplying power to a motor; a current sensor provided to the lower switching element; and a fault determining unit for determining a fault in the current sensor. When the lower switching element for each phase is OFF, the current sensor detects the current error in each phase. The fault determining unit obtains a current error determination value on the basis of the value obtained by converting, to Cartesian coordinates, the current error for each phase or the magnitude of the sum of current error vectors for each phase in which the value for the current error for each phase is held as the magnitude, and determines a fault.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: May 11, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuya Tsuchimoto, Isao Kezobo, Shunsuke Nakajima, Akira Furukawa
  • Patent number: 11005407
    Abstract: Provided are a data obtaining method, an inverter, and a rotating electric machine capable of managing the operation state of a device without complicating the configuration thereof. Therefore, the data obtaining method uses an inverter for controlling a synchronous electric motor, wherein a position/speed calculation unit of the inverter calculates an electric angle of the synchronous electric motor from the value of the current flowing between the synchronous electric motor and the inverter and obtains data for each electric angle by sampling internal data within the inverter, said internal data being used for controlling the synchronous electric motor in synchronization with the information of the electric angle.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: May 11, 2021
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Toshio Tomita, Kenichi Saito, Yuuta Iwase, Masahiro Sano
  • Patent number: 11005398
    Abstract: Provided is a motor drive controller capable of a locking energization operation while preventing increase in temperature of a coil. The motor drive controller includes a motor drive section selectively energizing coils with a plurality of phases of a motor and a locking energization control section. The locking energization control section performs a locking energization operation when the motor is started or restarted and holds a rotor of the motor in a position corresponding to the coil in which the lock current flows. In case of performing the locking energization operation, the locking energization control section switches a locking energization pattern for applying the lock current in the coil from a locking energization pattern when the preceding locking energization operation was performed. The locking energization control section controls the motor drive section so that the lock current flows in the coil in accordance with the switched locking energization pattern.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: May 11, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Hiroyuki Kaidu, Youhei Serizawa, Shunsuke Harigae, Zhou Xiao
  • Patent number: 10981598
    Abstract: A control apparatus calculates an axial force deviation, which is a difference between an ideal axial force and an estimated axial force. The ideal axial force is based on a target pinion angle of a pinion shaft configured to rotate in association with a turning operation of steered wheels. The estimated axial force is based on a state variable (such as a current value of a steering operation motor) that reflects vehicle behavior or a road condition. The control apparatus changes a command value for a reaction motor in response to the axial force deviation. For example, the control apparatus includes a basic control circuit configured to calculate a basic control amount, which is a fundamental component of the command value. The basic control circuit changes the basic control amount in response to the axial force deviation. The command value based on the basic control amount reflects the road condition.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: April 20, 2021
    Assignee: JTEKT CORPORATION
    Inventor: Takashi Kodera
  • Patent number: 10974601
    Abstract: A braking control device for a vehicle includes an anti-lock controller and a resonance controller. The anti-lock controller is configured to perform an anti-lock control that includes making an adjustment to the braking torque command, to cause suppression of one or more wheels from being locked during braking of the vehicle. The resonance controller is configured to correct the braking torque command, to control resonance of a power transmitter. The resonance controller includes a resonance generation processor that is configured to generate the resonance while imposing a limitation on magnitude of the resonance. The resonance controller is configured to suppress the resonance except during the anti-lock control, and allow the resonance generation processor to generate the resonance while imposing the limitation on the magnitude of the resonance during the anti-lock control.
    Type: Grant
    Filed: October 24, 2017
    Date of Patent: April 13, 2021
    Assignee: SUBARU CORPORATION
    Inventors: Fumiyuki Moriya, Hiroshi Ienaga
  • Patent number: 10972022
    Abstract: An apparatus for diagnosing failure of a motor driving system using a resolver signal includes a resolver sensing a rotor position and a rotational frequency of a motor, a fast Fourier transform operation unit configured to perform fast Fourier transform on an output signal of the resolver to convert the output signal into frequency signals, a specific frequency band extraction unit configured to extract, from among the frequency signals, a specific frequency band including one or more frequencies selected from among a PWM switching frequency applied to an inverter, a motor's rotational frequency, and a preset resolver excitation signal frequency, and a failure diagnosing unit configured to diagnose failure by comparing a sum or a highest voltage among voltages corresponding to the frequencies included in the specific frequency band with a predetermined reference value.
    Type: Grant
    Filed: October 21, 2019
    Date of Patent: April 6, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Joo Young Park, Young Un Kim, Jae Sang Lim, Jae Ho Hwang, Su Hyun Bae, Yong Jae Lee, Tae Young Chung
  • Patent number: 10951143
    Abstract: Various embodiments of the present technology comprise a method and apparatus for rotation detection of a brushed DC motor. The method and apparatus may detect switching of the commutators and utilize signals indicative of switching to determine speed and/or rotation information of the motor. In one embodiment, the apparatus comprises an ADC, a difference circuit, an absolute value circuit, and a comparator connected in series with each other.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: March 16, 2021
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventor: Tsutomu Murata
  • Patent number: 10931094
    Abstract: A method for detecting an open-phase condition of a transformer having a grounded-wye high voltage side connection including monitoring current flowing in a neutral connection on the high voltage side of the transformer in real time by voltage relaying and current relaying to identify an open phase condition signature in a signal capable of characterizing change of current magnitude. A current signal may be injected onto the neutral terminal and the zero-sequence mode of the transformer monitored to detect an open-phase condition indicated by an increase in network impedance and decrease or elimination of the injection current.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: February 23, 2021
    Assignee: The UAB Research Foundation
    Inventors: Robert F. Arritt, Roger C. Dugan, Wayne E. Johnson, Gregory A. Franklin
  • Patent number: 10906580
    Abstract: Disclosed is a method for detecting a fault in an electric motor of a power-assisted steering system of an automobile vehicle. The method notably includes a step for: determination of a residual direct sinusoidal voltage and of a residual quadrature sinusoidal voltage based on the measured direct sinusoidal current, on the estimated direct sinusoidal current, on the measured quadrature sinusoidal current and on the estimated quadrature sinusoidal current; and detection of a fault when the difference between the value of the residual direct sinusoidal voltage and its moving average is greater than a first threshold and/or when the difference between the value of the quadrature sinusoidal voltage and its moving average is greater than a second threshold.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: February 2, 2021
    Assignees: CONTINENTAL AUTOMOTIVE FRANCE, CONTINENTAL AUTOMOTIVE GMBH
    Inventor: Michel Parette
  • Patent number: 10889319
    Abstract: A method for controlling a power steering device including a steering assist motor and a steering wheel. In the method, a steering wheel torque setpoint is generated, the actual steering wheel torque actually exerted by the driver on the steering wheel is measured, the difference, the so-called “steering wheel torque error”, between the steering wheel torque setpoint and the actual steering wheel torque is determined, then a motor torque setpoint for the steering assist motor is generated from a first filtered proportional component on one hand, obtained by filtering via a phase-lead filter the steering wheel torque error weighted by a first assist gain, and from a second derivative return component on the other hand, obtained by calculating the time derivative of the actual steering wheel torque and weighting the derivative by means of a second derivative gain.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: January 12, 2021
    Assignee: JTEKT EUROPE
    Inventors: Pascal Moulaire, Hervé Peltier, Arnaud Thiery, Tahar Slama
  • Patent number: 10880027
    Abstract: The present disclosure is to enable simplification of processing for analyzing each sensor value. Provided is a sensor including a continuous excess detection part that detects a continuous excess state, which is a state where an absolute value of a sensor value exceeds a predetermined threshold value continuously for a predetermined period of time and a start specification part that specifies an operation start timing of a robot on the basis of a timing when the continuous excess state is detected.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: December 29, 2020
    Assignee: OMRON Corporation
    Inventor: Yahiro Koezuka
  • Patent number: 10875407
    Abstract: A method and a system for driving a hybrid vehicle are provided for determining whether the hybrid vehicle is driven in a sensorless control mode or not by estimating a rotor position value based on electric current and voltage of a drive motor. Such a hybrid vehicle is capable of controlling the drive motor to operate by using a transmission in an area in which precise torque control of the drive motor is possible, without using information detected by a stator position sensor provided in the drive motor of the hybrid vehicle. Accordingly, a drive motor control precision is improved when a rotor position sensor does not operate normally, thereby preventing a vehicle shutdown from occurring.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: December 29, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Ho Joon Shin, Chae Duck Chon, HeonYoung Kwak
  • Patent number: 10870444
    Abstract: Provided is a control apparatus for a power steering apparatus, and a power steering apparatus using it that can reduce electromagnetic noise with the aid of a spread spectrum, thereby realizing stabilized motor control.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: December 22, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masaki Kashima, Yoshitaka Sugiyama, Masaki Itabashi, Tadashi Suganuma, Kazuya Yamano
  • Patent number: 10868485
    Abstract: A constant torque control method for a permanent magnet synchronous motor. The method includes: 1) starting a motor; setting a torque T of the motor; calculating a given current iq_limit on a q-axis based on the torque T; setting a target current iq_A on the q-axis to be equal to the given current iq_limit; and allowing the motor to operate in a constant torque control mode by a current-based proportional integral (PI) controller on the q-axis; 2) presetting a reference speed Vref1 of the motor; measuring a real-time speed V of the motor; when the real-time speed V is less than the reference speed Vref1, increasing an extra current delta_iq to the given current iq_limit to intervene the real-time speed V of the motor; and 3) measuring the real-time speed V of the motor; and calculating a speed difference Err=V?Vref2.
    Type: Grant
    Filed: September 26, 2019
    Date of Patent: December 15, 2020
    Assignee: ZHONGSHAN BROAD-OCEAN MOTOR CO., LTD.
    Inventors: Jinghao Lan, Wenqing Bian
  • Patent number: 10836371
    Abstract: A vehicle includes an engine, an electric machine selectively coupled to the engine, a traction battery, an electrical outlet, and first and second power inverters. The first power inverter is configured to transfer power between the traction battery and the electric machine. The second power inverter is configured to transfer power between the traction battery and the electrical outlet. A human-machine interface (HMI) has a selectable option indicative of a user's desire to use the electrical outlet at a next destination. A controller of the vehicle includes a processor and memory having stored therein a first battery state of charge (SOC) target and a second battery SOC target that is greater than the first SOC target. The controller is programmed to, in response to the selectable option being selected, switch from the first SOC target to the second SOC target and command charging of the traction battery responsive to a measured battery SOC being less than the second target.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 17, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Harish Thiruvengadam, Erik J. Christen, Kevin James Rhodes, Chad Bednar