Patents Examined by Said Bouziane
  • Patent number: 11031887
    Abstract: A motor control device includes: a storage configured to store reference Lissajous values; and a controller configured to apply an excitation signal to a resolver; receive an output signal output from the resolver, to obtain a Lissajous value corresponding to the received output signal, to determine that an external noise is input when the obtained Lissajous value is different from the reference Lissajous values, and to control driving of a motor based on the obtained Lissajous value when the obtained Lissajous value is equal to any one of the reference Lissajous values. A vehicle having the motor control device may further include a battery configured to transmit power to the motor and to be charged by regenerative braking of the motor.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: June 8, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jiwan Cha, Han Hee Park, JaeHyeon Lee, Seongmin Kim, Hyunwoo Noh, Taeil Yoo
  • Patent number: 11025185
    Abstract: An adaptive control system (2) for controlling a plant (3) is disclosed. The adaptive control system comprises a control system (5) configured to generate drive signals (16) for the plant in dependence upon a reference signal (8) and an error signal, and a state observer (17) or state sensor (17?; FIG. 2) configured to generate an estimate of a state of the plant in dependence upon the reference signal. The system comprises an error combiner (12) configured to selectably combine a first error (11) determined from the reference signal and a set of measurements of the plant and a second error (13) determined from the reference and the estimate.
    Type: Grant
    Filed: November 24, 2016
    Date of Patent: June 1, 2021
    Assignee: Renesas Electronics Europe GmbH
    Inventor: Suad Jusuf
  • Patent number: 11018557
    Abstract: An speed detection apparatus of a rotational shaft in a robot arm that is applied to a drive mechanism is provided. The speed detection apparatus includes: first and second rotation sensors that are disposed on a side of a rotational shaft of the robot arm and outputs first and second rotational position signals with a phase difference of 90 degrees; first and second differentiators that differentiate the first and second rotational position signals; and a speed calculator that obtains a rotational speed of the robot arm by calculating a sum of squares of a first differential signal and a second differential signal.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: May 25, 2021
    Assignee: DENSO WAVE INCORPORATED
    Inventor: Kenji Nagamatsu
  • Patent number: 11018611
    Abstract: A control apparatus for a multi-phase rotating electric machine includes at least one electric power converter, a command value calculator and an input voltage determiner. The at least one electric power converter converts DC power into multi-phase AC power and supplies the multi-phase AC power to the rotating electric machine. The command value calculator calculates command values for operating the at least one electric power converter. The input voltage determiner determines whether an input voltage of the at least one electric power converter is within a normal operation range. When the input voltage is determined by the input voltage determiner to be outside the normal operation range, the control apparatus switches control to ignore voltage change or current change caused by the reverse input of an external force to the rotating electric machine from a load side or suppress control fluctuation caused by the reverse input of the external force.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: May 25, 2021
    Assignee: DENSO CORPORATION
    Inventors: Kotaro Nakashima, Nobuyori Nakajima, Takafumi Sato, Akira Takesaki, Takashi Suzuki
  • Patent number: 11011998
    Abstract: An inverter power generator includes an engine, an actuator that adjusts the position of a throttle valve of the engine, a power generator that generates AC power from a driving force of the engine, a converter that converts the AC power outputted from the power generator into DC power, an inverter that converts the DC power outputted from the converter into AC power, a current detector that detects the current of the AC power outputted from the inverter, a voltage detector that detects the voltage of the AC power outputted from the inverter, a target rotation speed determiner that determines a target rotation speed of the engine based on a detected current value and a correction value based on the difference between a target voltage value and the detected voltage value, and an actuator controller that controls the actuator based on the determined target rotation speed.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: May 18, 2021
    Assignee: YAMAHA MOTOR POWER PRODUCTS KABUSHIKI KAISHA
    Inventors: Masataka Kaneko, Keisuke Sugiura
  • Patent number: 11012018
    Abstract: A system includes a motor-driven component, a motor configured to operate the motor-driven component, and a motor drive circuit configured to power the motor. The motor drive circuit includes at least one complementary stage, where each stage includes a first transistor and a second transistor. During operation of the motor drive circuit, the first transistor is switched on when the second transistor is switched off. The system includes a controller communicatively coupled to the motor drive circuit. A load condition associated with the component is monitored. Based on the load condition, the controller determines whether the component is operating at a light load condition. If the component is operating at the light load condition, a switching frequency of each of stages is changed from a first switching frequency to a second switching frequency, which is less than the first switching frequency.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: May 18, 2021
    Assignee: Lennox Industries Inc.
    Inventor: Jose Juan Sandoval
  • Patent number: 11001148
    Abstract: To appropriately limit a current output from an inverter to a motor according to a state of a cooling mechanism that cools the motor and the inverter. A motor control unit includes a current command unit configured to calculate current command values (Id*, Iq*) for determining a current to be output to a motor on the basis of an input torque command, a motor lock determination unit configured to determine whether the motor is in a locked state on the basis of a motor rotation speed Nrpm indicating a rotation state of the motor, and a torque command limitation unit configured to limit the current to be output to the motor by limiting the torque command on the basis of a cooling water temperature Tc indicating a state of the cooling mechanism in a case where the motor lock determination unit determines that the motor is in the locked state.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: May 11, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hirokazu Matsui, Atsushi Komuro, Kohei Myoen
  • Patent number: 11005400
    Abstract: In order to suppress high-frequency noise in micro-step driving of a stepping motor, a motor control device (100) includes an H bridge circuit (20) and control means for driving a switching element of the H bridge circuit (20) with a PWM signal and for setting a charge mode, a fast attenuation mode, or a slow attenuation mode for a motor coil. In a range from an electrical angle where the reference current value starts descending to an electrical angle of +52°, the control means switches the H bridge circuit (20) every PWM cycle to the charge mode and then to the slow attenuation mode. In a range exceeding +52° and to +90 degrees where the reference current value starts ascending, the control means switches the H bridge circuit (20) every PWM cycle to the charge mode and, if the motor current exceeds the reference current value, then the control means switches it to the fast attenuation mode and further to the slow attenuation mode.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: May 11, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Kei Yamazaki, Tetsuya Seki, Shigeki Miyaji
  • Patent number: 11005403
    Abstract: The present disclosure relates to a motor control system and method based on current feedback signal. The motor control system includes a control apparatus, a linear motor, and a current feedback apparatus, where an output end of the control apparatus is connected to the linear motor for calculating a displacement error of a previous moment to obtain a control output value of a current moment, and converting the control output value into a voltage signal for transmission to the linear motor; the linear motor is configured to vibrate according to the voltage signal input by the control apparatus; and the current feedback apparatus is connected to the linear motor, and is configured to: convert a measured current value of the linear motor into an actual displacement value of the current moment, and feed back the actual displacement value to an input end of the control apparatus.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: May 11, 2021
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Xiang Lu, Zheng Xiang, Liang Jiang, Hanlin Deng
  • Patent number: 11005406
    Abstract: Disclosed embodiments are directed to a technique to remove DC offset from current measurement signals through shunt resistors in digital signal processing for current reconstruction when using discontinuous pulse width modulation (DPWM). Such measurements regarding current are pertinent to a feedback loop used for a system including a DC-link capacitor, inverter, and motor. A method of removing DC offset comprises: determining a three-phase output current signal of an inverter, wherein the inverter is coupled to a motor and a power supply; producing a voltage signal based on the three-phase output current signal and the resistances of one or more shunt resistors disposed in the inverter; applying an analog gain circuit to the voltage signal; processing the voltage signal with an analog-to-digital converter (ADC); applying a DC offset corrector to the voltage signal; and performing current reconstruction on the voltage signal to produce a continuous current signal.
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: May 11, 2021
    Assignee: Toshiba International Corporation
    Inventors: Goutham Selvaraj, Yu Liu
  • Patent number: 11000337
    Abstract: An instrument chassis for a robotic surgical system comprises a bridge member, a first instrument guide member configured to receive a first surgical instrument, and a second instrument guide member configured to receive a second surgical instrument. Each of the first instrument guide member and the second instrument guide member is moveably coupled to the bridge member such that each of the first instrument guide member and the second instrument guide member is moveable in at least one degree of freedom relative to the bridge member. The instrument chassis further comprises a central instrument guide member coupled to the bridge member between the first instrument guide member and the second instrument guide member. The central instrument guide member is configured to receive a third surgical instrument. Each of the first instrument guide member and the second instrument guide member is slidably movable relative to the bridge member.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: May 11, 2021
    Assignee: INTUITIVE SURGICAL OPERATIONS, INC.
    Inventors: Thomas Grosvenor Cooper, David Quentin Larkin, David Joseph Rosa
  • Patent number: 11002569
    Abstract: An example actuator control system includes a variable differential transformer (VDT) configured to measure displacement of a motor, and a motor controller configured to control the motor based on displacement data from the VDT. A circuit card assembly (CCA) interconnects the VDT to the motor controller. The CCA includes memory storing configuration data of the VDT, and the CCA is configured to provide the configuration data to the motor controller to calibrate the motor controller for use of the VDT. A method of configuring a motor controller is also disclosed.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: May 11, 2021
    Assignee: HAMILTON SUNDSTRAND CORPORATION
    Inventors: Jeffrey A. Eldridge, Steven A. Avritch
  • Patent number: 11005409
    Abstract: A motor drive apparatus includes a converter which converts AC power into DC power and outputs it to a DC link, an inverter which converts the DC power of the DC link into AC power for driving a motor, DC link capacitors connected in series with each other, resistors connected in parallel with the DC link capacitors and connected in series with each other, a DC link voltage detection unit, a current-carrying element which is connected between one of connection points connecting the DC link capacitors to each other and one of connection points connecting the resistors to each other, and carries a current when the applied voltage is higher than a predetermined value, and a short-circuit judgment unit which judges that at least one of the DC link capacitors has shorted when the DC link voltage value is larger than an upper limit or smaller than a lower limit.
    Type: Grant
    Filed: May 10, 2019
    Date of Patent: May 11, 2021
    Assignee: Fanuc Corporation
    Inventors: Akinori Satou, Shinichi Horikoshi
  • Patent number: 11005394
    Abstract: The present invention provides a control system (100, 200, 300) for controlling a single phase induction motor (150, 250) with a main winding (151, 251) and with an auxiliary winding (152, 252), the control system (100, 200, 300) comprising a first bidirectional switching element (101) and a second bidirectional switching element (102), wherein the first bidirectional switching element (101) is arranged between a phase supply input (103, 203) of the single phase induction motor (150, 250) and the main winding (151, 251) and wherein the second bidirectional switching element (102) is arranged electrically parallel to the main winding (151, 251), and a control unit (105, 205) coupled to the first bidirectional switching element (101) and the second bidirectional switching element (102).
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: May 11, 2021
    Assignee: CARLO GAVAZZI SERVICES AG
    Inventors: Reiko Raute, Roger Galea, Johann Galea, Jason Demicoli
  • Patent number: 11001295
    Abstract: A motor control device for performing PWM control of an inverter for driving a three-phase brushless motor on the basis of a current command value, wherein the motor control device is provided with: a voltage command value computation unit for calculating a voltage command value using the current command value, and a motor rotation speed and a motor electric angle acquired for each control cycle from the three-phase brushless motor; an electric angle interpolation unit for estimating an interpolated electric angle from the motor electric angle at division intervals obtained by dividing the control cycle; a conversion unit for calculating a three-phase Duty command value from the voltage command value and the motor electric angle, and calculating a three-phase interpolated Duty command value from the voltage command value and the interpolated electric angle; and an output setting unit for switching between, and outputting, the three-phase Duty command value and the three-phase interpolated Duty command value s
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: May 11, 2021
    Assignee: NSK LTD.
    Inventors: Hiroaki Takase, Ryo Minaki, Takayoshi Sugawara, Kouichi Nampei
  • Patent number: 11003154
    Abstract: A motor control system includes motor control devices and a controller. The controller generates and transmits a communication signal including an operation command to the respective motor control devices. The motor control devices include two motor control devices in a first group, each of which includes a data transceiver, a motor controller, a corrector, and a synchronous timing generator, and a motor control device in a second group. The data transceiver receives an operation command issued to the motor control device, and receives operation information in the motor control device in the second group. Based on the operation command, the motor controller generates a torque command signal. The corrector generates a torque correction signal based on the operation information, and corrects the torque command signal. The synchronous timing generator generates a timing signal that matches pieces of process timing of the motor controllers in the first group with each other.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: May 11, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGENENT CO., LTD.
    Inventors: Mitsutaka Okura, Akinobu Tomita, Hiroshi Fujiwara, Yoshiaki Ikeuchi
  • Patent number: 11005411
    Abstract: A battery pack and charger system includes a first battery pack having a first set of battery cells and configured to provide only a first operating voltage and a second battery pack having a second set of battery cells and configured to provide the first operating voltage and a second operating voltage that is different from the first operating voltage and a battery pack charger configured to be able to charge the first battery pack and the second battery pack.
    Type: Grant
    Filed: May 6, 2020
    Date of Patent: May 11, 2021
    Assignee: Black & Decker Inc.
    Inventors: Daniel J. White, Matthew J. Velderman, Andrew E. Seman, Jr.
  • Patent number: 11001297
    Abstract: To provide an electric motor control system and an electric power steering apparatus that torque of the electric motor can be increased for ensuring of steering performance even at the time of abnormality occurrence. The controller is provided with 2 sets of control systems which control a supply current to each set of the windings. When abnormality occurs in one set of the windings and the control system, the electric motor control system sets 0 to supply current to all phase or partial phase windings of abnormality occurrence set, and increase supply current to normal set of the windings up to an irreversible current that increase an irreversible demagnetizing factor of the permanent magnet more than the normal time.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: May 11, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuji Takizawa, Satoru Akutsu, Yoshihito Asao
  • 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: 11005412
    Abstract: A battery pack and charger system includes a first battery pack having a first set of battery cells and configured to provide only a first operating voltage and a second battery pack having a second set of battery cells and configured to provide the first operating voltage and a second operating voltage that is different from the first operating voltage and a battery pack charger configured to be able to charge the first battery pack and the second battery pack.
    Type: Grant
    Filed: May 6, 2020
    Date of Patent: May 11, 2021
    Assignee: Black & Decker Inc.
    Inventors: Daniel J. White, Matthew J. Velderman, Andrew E. Seman, Jr.