Patents Examined by Antony M. Paul
  • Patent number: 11190119
    Abstract: A control device includes: an output unit configured to select a motor and output a drive command to a motor drive unit that should be connected to the selected motor so that the selected motor executes a predetermined feed operation; an acquisition unit configured to acquire feedback information from each of the multiple motor drive units; and a wire connection determination unit configured to determine, based on the feedback information, whether the selected motor is connected to the motor drive unit that should be connected to the selected motor, by a power line and a feedback line.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: November 30, 2021
    Assignee: FANUC CORPORATION
    Inventors: Yuuki Shirakawa, Satoshi Ikai, Wei Luo
  • Patent number: 11190115
    Abstract: A motor starter apparatus includes an enclosure, a bypass contactor configured to be installed in the enclosure and configured to selectively couple a power source to a motor, and a reduced voltage soft starter (RVSS) circuit assembly (e.g. a wheeled truck) configured to be installed in the enclosure, to be coupled to the power source and to apply a variable voltage to the motor. The bypass contactor is configured to preserve a connection of the bypass contactor to the power source and the motor when the RVSS circuit assembly is removed from the enclosure.
    Type: Grant
    Filed: May 5, 2020
    Date of Patent: November 30, 2021
    Inventor: Thomas A. Farr
  • Patent number: 11183833
    Abstract: A multi-port power converter including a housing comprising a plurality of ports structured to electrically interface to a plurality of loads, the plurality of loads having distinct electrical characteristics; a plurality of solid-state components configured to provide selected electrical power outputs and to accept selected electrical power inputs; a plurality of solid-state switches configured to provide selected connectivity between the plurality of solid-state components and the plurality of ports; and a controller, the controller comprising: a component bank configuration circuit structured to interpret a port electrical interface description comprising application requirements for a selected mobile electric application, the port electrical interface description comprising a description of at least a portion of the distinct electrical characteristics; and a component bank implementation circuit structured to provide solid switch states in response to the port electrical interface description, and wherein
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: November 23, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventors: Jalpa Shah, Meng Wang, Damrongrit Piyabongkarn
  • 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: 11177753
    Abstract: An electric machine control system adapted to a motor includes a voltage detector, a power module, a current detector and a controller. The voltage detector detects a bus voltage to generate a voltage detection signal. The power module generates a first phase current, a second phase current and a third phase current to drive the motor according to the bus voltage and a PWM signal. To generate the current detection signal, the current detector detects at least two of the following: the first phase current, the second phase current and the third phase current. When the motor is operating in a steady state and blocked, the controller calculates the DC offset error of the motor according to the voltage detection signal and the current detection signal.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: November 16, 2021
    Assignee: DELTA ELECTRONICS, INC.
    Inventor: Shao-Kai Tseng
  • Patent number: 11171593
    Abstract: A brushless DC motor identification method capable of identifying information on a brushless DC motor, particularly without performing any handshaking, includes supplying an input voltage from an identifier to a brushless DC motor including at least one resistor connected between a power supply line and a GND line, reading a resistance value of at least one resistor in a state where the inverter of the brushless DC motor is off, and identifying information on the brushless DC motor based on the read resistance value.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: November 9, 2021
    Assignee: NIDEC CORPORATION
    Inventor: Hideyuki Takemoto
  • Patent number: 11165377
    Abstract: A control device for a stepping motor capable of hold control that can smoothly reduce an excitation current at a rotation stopping time of the stepping motor is provided. A control device (10) for a stepping motor (20) causes an excitation current to flow in a plurality of coils to rotate a rotor. The control device (10) includes a driving circuit (40) that applies a driving voltage to the coils, and a control circuit (30) that controls the driving voltage. The control circuit (30) performs hold control to move the rotor to a predetermined stop position by changing a magnitude of the excitation current flowing in the coils so that the magnitude of the excitation current becomes close to a target current value that gradually decreases, in a hold time period at a rotation stopping time of the stepping motor (20).
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: November 2, 2021
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Ayaka Shimada, Kazuo Takada, Kei Yamazaki
  • Patent number: 11159008
    Abstract: A mobile application including a motive power circuit including a power storage device and an electrical load; a power distribution unit (PDU) electrically interposed between the power storage device and the electrical load, wherein the PDU includes a breaker/relay positioned on one of a high side and a low side of the power storage device; wherein the breaker/relay includes: a fixed contact electrically coupled to the power bus; a movable contact selectively electrically coupled to the fixed contact; an armature operationally coupled to the movable contact; a first biasing member biasing the armature into one of the first position or the second position; and a means for selecting a down force value of the movable contact, thereby providing for a physical opening response of the breaker/relay in response to a selected current value.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: October 26, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventor: Brandon William Fisher
  • Patent number: 11152880
    Abstract: A control apparatus includes a controller that controls, by vector control, voltages and currents to be supplied to plural phases of a brushless motor. The vector control is performed through rotation control using a q-axis current predominantly to control rotation of a rotor, and field fixing control using a d-axis current predominantly in response to reception of a stop command signal. The controller controls the brushless motor with reduced influence of a dead time, in which a high-side switching element and a low-side switching element of each of plural half-bridge circuits are simultaneously set to OFF. The plural half-bridge circuits are provided in association with the plural phases of the brushless motor and are configured to supply the voltages and the currents to the respective phases. The influence of the dead time is reduced through the field fixing control.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: October 19, 2021
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Motohiro Tokairin, Yukitoshi Takano, Yukio Kontani, Toyohiko Hoshino, Hitoshi Mikami
  • Patent number: 11152781
    Abstract: A system including a vehicle having a motive electrical power path; a power distribution unit including a current protection circuit disposed in the motive electrical power path, the current protection circuit including a breaker/relay, the breaker/relay including: a fixed contact, a moveable contact, and a physical opening response portion responsive to a current value; a current source circuit electrically coupled to the breaker/relay and structured to inject a current across the fixed contact; and a voltage determination circuit electrically coupled to the breaker/relay and structured to determine at least one of an injected voltage amount and a contactor impedance value, wherein the voltage determination circuit comprises an analog hardware filter having a cutoff frequency selected in response to a frequency of the injected current.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: October 19, 2021
    Assignee: Eaton Intelligent Power Limited
    Inventor: Brandon William Fisher
  • Patent number: 11152887
    Abstract: A temperature abnormality of the power module is accurately detected. A power conversion device including a power semiconductor module with a switching element, includes: a gate driver circuit configured to drive a switching element and transmitting a response signal upon a switching operation of the switching element; a control unit device configured to output to a gate driver circuit an instruction signal for switching; a temperature detection unit configured to calculate a bonding temperature of the switching element based on a response signal to the instruction signal; and a calculation unit configured to determine a state of a power semiconductor module according to a bonding temperature calculated by the temperature detection unit and the response signal.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: October 19, 2021
    Assignee: HITACHI, LTD.
    Inventors: Yoshinobu Kimura, Kazuki Tani, Takashi Ogawa, Hiroshi Suzuki, Junichi Sakano
  • Patent number: 11152884
    Abstract: An object is to suppress an increase in current variation amount of a power storage device. A control device sets an allowable modulation factor, based on a circuit characteristic of a DC part that is on a power storage device side of an inverter, such that a current variation amount of the power storage device becomes equal to or smaller than an allowable current variation amount, and sets switching pattern commands of a plurality of switching elements, based on a set allowable modulation factor.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: October 19, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshihiro Yamamoto, Hiroyuki Oyanagi
  • Patent number: 11152878
    Abstract: Systems and methods for improving shifting of a transmission are described. The systems and methods may be applied to automatic or manual transmissions, but the systems and methods may be particularly suited for automatic transmissions. In one example, electrical input to an alternator and electrical output from the alternator is adjusted in response to a request to upshift a transmission.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: October 19, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: Ross Dykstra Pursifull, Naginder Gogna, Joseph Thomas
  • Patent number: 11146183
    Abstract: A method for controlling an inverter configured to power electrically a motor including a stator and a rotor capable of being rotated relative to the stator when the motor is electrically powered, the inverter including a plurality of switches suitable for being controlled to open/close in order to regulate the power supply of the motor, each switch having a predetermined transition time from a closed state to an open state, and a predetermined transition time from the open state to the closed state, wherein the method includes the step of not generating the command to open and close the switches when this violates the predetermined transition times from a closed state to an open state, and the predetermined transition times from the open state to the closed state.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: October 12, 2021
    Assignee: Safran Electrical & Power
    Inventors: Wenceslas Bourse, Pascal Jacques Frederic Guy Toutain
  • Patent number: 11146202
    Abstract: A motor system may include three switching circuits, each of which includes two upper switching elements and two lower switching elements. A controller includes a signal output module, a signal distribution module, and a signal adjusting module. The signal output module outputs upper and lower PWM signals. The signal distribution module distributes each of the upper (lower) PWM signals alternately to the first upper (lower) switching element and the second upper (lower) switching element of corresponding one of the switching circuits. The signal adjusting module inverts all the PWM signals output by the signal output module when (1) each of currents flowing through two of the three coils has a negative value and all the three upper PWM signals are at HIGH level, or (2) each of currents flowing through two of the three coils has a positive value and all the three lower PWM signals are at LOW level.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: October 12, 2021
    Assignee: DENSO CORPORATION
    Inventors: Hyoungjun Na, Ken Toshiyuki
  • Patent number: 11137724
    Abstract: An electronic timepiece can prevent overrunning when driving a motor at a high speed. The electronic timepiece has a controller that controls a driver to an on state or an off state according to the current value detected by the current detector; a polarity changer that determines driving one step of the motor ended and changes the polarity of the drive current when the on time or off time is detected to meet a specific condition; and a drive period adjuster that sets the terminal supplying the drive current to the coil to a first state if the remaining drive step count is greater than the remaining count evaluation number, and if the remaining drive step count is less than or equal to the remaining count evaluation number, sets the terminal to a second state in which the brake force applied to the rotor is greater than in the first state.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: October 5, 2021
    Inventor: Takashi Kawaguchi
  • Patent number: 11139771
    Abstract: To enable overmodulation control having high controllability and low noise characteristics, a control device of an AC motor includes an inverter for driving an AC motor and a controller for controlling the inverter by pulse width modulation. The controller, when over-modulating the inverter, limits the amplitude of the voltage command in the pulse width modulation to a predetermined upper limit value or less.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: October 5, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshitaka Iwaji, Naoki Okamoto, Masaki Hano, Takeshi Umetsu
  • Patent number: 11139770
    Abstract: A gate driving circuit applied to motor inverter includes first power switch circuit, first and second bootstrap fast charging circuits, and first, second and third capacitors. The first power switch circuit includes first and second power switches. The first bootstrap fast charging circuit is electrically connected to the first power switch. The second bootstrap fast charging circuit is electrically connected to the second power switch. The first capacitor is electrically connected to the first power switch. The second capacitor is electrically connected to the first bootstrap fast charging circuit and first insulated switch. The third capacitor is electrically connected to the second bootstrap fast charging circuit and second insulated switch. When the first power switch is disabled and the second power switch is enabled, an independent power supply enables the second bootstrap fast charging circuit to charge the third capacitor to enable the second insulated switch.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: October 5, 2021
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Chung-Wei Huang, Chu-Chen Yang
  • Patent number: 11133760
    Abstract: Embodiments of the present invention provide a method for controlling compressor braking, a frequency converter and a variable speed compressor. The method includes steps of: determining to brake a compressor, wherein a brake circuit includes three switching units and the three switching units are respectively electrically connected to three phases of windings of a motor of the compressor; actuating two of the three switching units to short-circuit two phases of windings of the motor. The two phases of windings of the motor are short-circuited by controlling the three switching units to generate braking torque, such that the compressor is braked without introducing a DC voltage, and thus the braking energy consumption is reduced. Besides, by turning on only two switches at a time, the switching abrasion is reduced, and the overall service life of the three switching units is effectively improved.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: September 28, 2021
    Assignee: Danfoss (Tianjin) Ltd.
    Inventors: Shizhong Ji, Li Yao, Yingke Sun, Qingyue Meng
  • Patent number: 11128253
    Abstract: Motor overload protection device is equipped with a thermal monitor that can determine expected rotor temperature rise from rotor resistance estimates. The thermal monitor determines expected rotor temperature rise by using a correlation between rotor temperature rise computed from rotor resistance estimates, and motor thermal state estimates. The correlation can be derived by fitting a line to a plurality of points, with each point defined by an ordered pair composed of a rotor temperature rise estimate and a corresponding motor thermal state estimate, and determining a slope of the line. This rotor temperature slope can then be used by the thermal monitor to determine a rotor temperature rise given a rotor resistance estimate and a corresponding motor thermal state estimate. If the rotor temperature rise exceeds an expected rotor temperature rise by more than a predefined threshold, the thermal monitor issues an alarm and/or takes corrective actions in some embodiments.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: September 21, 2021
    Assignee: Schneider Electric USA, Inc.
    Inventor: Roy Stephen Colby