Patents Examined by Bickey Dhakal
  • Patent number: 10536105
    Abstract: A power conversion apparatus having a converter, an inverter controlled by inverter controller, and an input power source fluctuation detecting and controlling circuit is proposed. The input power source fluctuation detecting and controlling circuit includes an input power source fluctuation detector and a converter failure detector to detect overcurrent and/or overvoltage of the converter. When both of the input power source fluctuation and the converter failure are detected, the converter is gate blocked, and the inverter continues its operation, and when the DC voltage become lower than a threshold voltage during the converter is gate blocking, the input power source fluctuation detecting and controlling circuit outputs an inverter control changeover flag to the inverter controller for switching a contents of inverter control.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: January 14, 2020
    Assignee: Toshiba Mitsubishi-Electric Industrial Systems Corporation
    Inventors: Shunsuke Tobayashi, Toshiaki Oka
  • Patent number: 10536101
    Abstract: In a MG control device, a standard voltage calculation part calculates a d-axis standard voltage Vd_std and a q-axis standard voltage Vq_std to be supplied to a MG. A first magnetic flux change amount estimation value calculation part calculates a first magnetic flux change amount estimation value ??1 based on a deviation of a specific value from the q axis standard voltage Vq_std, where the specific value is obtained by multiplying a ratio (Vd_std/Vd_real) with a q-axis real voltage Vq_real, where Vd_real represents a d-axis real voltage. A second magnetic flux change amount estimation value calculation part calculates a second magnetic flux change amount estimation value ??2 based on a deviation of the q-axis real voltage Vq_real from the q-axis standard voltage Vq_std. The calculation switching part selects one of ??1 and ??2 based on an operation state of the MG.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: January 14, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takashi Ogawa, Masaki Nishiyama, Mitsuharu Matsuno
  • Patent number: 10536104
    Abstract: In a variable speed generator-motor apparatus, a power converter includes six two-terminal arms each formed by serially connecting k unit converters that can output arbitrary voltage, an AC rotating electric machine includes an armature winding with 60-degree phase zone formed from a double layer coil, the armature winding being divided into first and second pole sides to form double star connection by binding neutral points and to be drawn out as two sets of three-phase terminals; three-phase terminals on the first pole side are connected to first terminals of three arms, and second terminals of the three arms are star-connected to a first terminal of a DC power supply; three-phase terminals on the second pole side are connected to second terminals of remaining three arms, and first terminals of the three arms are star-connected to a second terminal of the DC power supply.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: January 14, 2020
    Assignee: HITACHI MITSUBISHI HYDRO CORPORATION
    Inventors: Akira Bando, Osamu Nagura
  • Patent number: 10536102
    Abstract: A main controller includes: a d-axis current limiter configured to calculate a d-axis current limiting value with priority, based on a dq-converted current limiting value, and calculate a limited d-axis current command value by clipping the d-axis current command value to be the d-axis current limiting value or less; a q-axis current limiter configured to calculate a q-axis current limiting value, based on the dq-converted current limiting value and the limited d-axis current command value, and calculate a limited q-axis current command value by clipping the q-axis current command value to be the q-axis current limiting value or less; and an inverter controller configured to control motor current, based on the limited d-axis current command value and the limited q-axis current command value.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: January 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Kishioka, Susumu Zeniya, Takashi Goto, Daisuke Tanaka, Akiyoshi Takashima, Eiji Iwami
  • Patent number: 10525649
    Abstract: A servo motor controller comprises: a position command generation unit; a position detection unit; a position control unit that generates a velocity command for position control based on a position command and a position FB; a force command generation unit that generates a force command for instructing force to be applied to a subject by a driving target; a force detection unit; a force control unit that generates a velocity command for force control based on the force command and a force FB; a selection unit that selects one of the position control and the force control; and a storage unit that stores a force threshold. The selection unit selects one of the velocity commands for the position control and the force control of a smaller value. If the force FB is smaller than the force threshold, the selection unit selects the velocity command for the position control.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: January 7, 2020
    Assignee: FANUC CORPORATION
    Inventors: Satoshi Ikai, Tsutomu Nakamura, Tomoyuki Aizawa
  • Patent number: 10526089
    Abstract: The embodiments of the disclosure discloses an aircraft spraying control device, a method thereof, and a spraying system, relating to the technical field of agricultural plant protection. The aircraft spraying control device comprises a micro-controller, a pump motor, and a nozzle motor; the micro-controller acquires the flight information of the aircraft and the preset pesticide spraying information of the aircraft, and acquires the target rotational speed n of the pump motor according to the flight information of the aircraft, the preset pesticide spraying information of the aircraft, and the pesticide discharging amount K per rotation of the pump motor so as to control the pump motor to rotate at the target rotational speed n of the pump motor so that the pump supplies pesticide to a nozzle. The micro-controller also controls the nozzle to spray.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: January 7, 2020
    Assignee: GUANGZHOU XAIRCRAFT TECHNOLOGY CO., LTD.
    Inventors: Bin Peng, Dengfeng Li
  • Patent number: 10530229
    Abstract: Various embodiments are described herein for switched reluctance machine configurations. In at least one embodiment, a switched reluctance machine configured according to the teachings herein comprises a stator including a predetermined number of salient stator poles (Ns), a rotor rotatably mounted with respect to the stator, with the rotor comprising a plurality of salient rotor poles, and a plurality of coils provided around the predetermined number of stator poles to form at least one phase of the switched reluctance machine, where the rotor poles and the stator poles are symmetrically disposed, and a number of rotor poles is related to Ns and a number of phases according to: i) (Ns/m)k ceil (mod (k,m)/m) for an odd number of phases, and ii) (Ns/m)k ceil (mod(k,m/2)/m/2) for an even number of phases, where m is the number of phases, and k is a configuration index based on Ns and m.
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: January 7, 2020
    Assignee: Enedym Inc.
    Inventors: Berker Bilgin, Ali Emadi
  • Patent number: 10530223
    Abstract: With respect to servo amplifiers attached to a component mounter, a motor unit of at of a drive mechanism assembled on a mounting head is attached to be exchangeable. A control device of the component mounter switches the servo amplifier from a servo on state to a servo off state before exchange of the motor unit, maintains servo amplifier system power in an on state, initializes an encoder of the motor unit connected to the servo amplifier after the motor unit has been exchanged, and returns the servo amplifier to a servo on state. By this, the servo motor of the exchange motor unit achieves a state in which feedback control can be performed based on detection information of the encoder, and operation of the exchanged motor unit can be started.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: January 7, 2020
    Assignee: FUJI CORPORATION
    Inventor: Masatoshi Fujita
  • Patent number: 10520059
    Abstract: A vibration isolator includes: a vibration isolator moving part that suppresses vibration caused by operation of a drive unit moving part; a vibration isolating speed generation unit that generates a vibration isolating command speed on the basis of a target position of the drive unit moving part; a return speed generation unit that generates a return command speed for returning the vibration isolator moving part to an original position; a control speed generation unit that generates a control command speed by adding the vibration isolating command speed generated by the vibration isolating speed generation unit and the return command speed generated by the return speed generation unit; and a vibration isolation control unit that controls the vibration isolator moving part on the basis of the control command speed generated by the control speed generation unit.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: December 31, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Makoto Higashino, Shinya Nagata
  • Patent number: 10520906
    Abstract: The disclosure enables mutual relationships among operation statuses of each motor to be ascertained without using synchronous serial communication between multiple motor control devices. The motor control system is equipped with: a motor driver having a trigger determination part for determining whether or not a trigger condition is satisfied, a trigger notification part for transmitting a trigger notification indicating that the trigger condition is satisfied to motor drivers by asynchronous communication, and a trace result information generation part for causing a storage part to store a trigger data number for identifying operation data when the trigger condition is satisfied; and motor drivers each having a trace result information generation part for causing a storage part to store a slave trigger time at which the trigger notification is received, a trigger data number for identifying operation data corresponding to the slave trigger time, and a master trigger time.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: December 31, 2019
    Assignee: OMRON Corporation
    Inventors: Daisuke Tamashima, Fumiaki Sato, Takao Ushiyama, Naoya Hashimoto
  • Patent number: 10518599
    Abstract: Provided is a damper with which the energy efficiency for attenuating input vibration corresponding to the unsprung resonance frequency and the sprung resonance frequency can be improved. Also provided is a method for manufacturing this damper. In this damper the electrical resonance frequency, as specified by the inductance of an electromagnetic motor and the capacitance of a capacitor, is set within ±20% of the unsprung resonance frequency, thereby enabling the input vibration corresponding to the sprung resonance frequency as well as the input vibration corresponding to the unsprung resonance frequency to be reduced.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: December 31, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventor: Nobuharu Kuriki
  • Patent number: 10520050
    Abstract: A control circuit configured to control an electromechanical brake is provided. The control circuit includes: a switching regulator configured to control a magnitude of voltage applied to a brake coil of the electromechanical brake; wherein said switching regulator includes at least one semiconductor switch, one diode, one capacitor and one inductor; the control circuit is configured such that, in operation, at least one signal from a process sub-system specifies the magnitude of the voltage for the brake coil; and at least one brake applying control signal from a safety sub-system can cause the brake coil voltage to be reduced to a level low enough to apply the brake by opening a switch and each brake applying control signal from the safety sub-system has a corresponding diagnostic feedback signal to the safety sub-system that indicates the state of the corresponding switch. A method and a system are disclosed.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: December 31, 2019
    Assignee: KOLLMORGEN CORPORATION
    Inventors: Robert Pearce, George B. Yundt, Daniel Kouba
  • Patent number: 10523136
    Abstract: Provided are an inverter device, which is capable of preventing a malfunction of the inverter device while reducing the number of interface wirings, and a method of controlling the inverter device. A communication terminal of a communication circuit having a function of communicating to/from a vehicle, an input terminal for a start signal for starting a control circuit, and a signal for holding the control circuit active even when the start signal is changed after the start of the control circuit are used. A drive prohibition signal issued from the vehicle is received through the same terminal as that for the start signal to unify terminals for the start signal and the drive prohibition signal, to thereby reduce the number of interface wirings.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: December 31, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tomohiro Kurita, Naruki Suetake, Tatsuki Kowa
  • Patent number: 10516353
    Abstract: A motor calibration system and method for a motor having a rotor, a stator, and at least one phase. The system further comprises a controller and a position detector adapted to detect a position of the rotor with respect to the stator. Wherein the controller is adapted to perform a calibration sequence to calibrate to motor by driving at least one motor phase with a motor control signal at a predetermined maximum amplitude value in a first direction with substantially no load applied on the motor, receiving a feedback signal from the at least one position detector, and determining a first calibration angle shift by measuring a difference between at least the motor control signal and the feedback signal of the at least one motor phase. The controller accounts for the first calibration angle shift when driving the motor in the first direction during normal operation.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: December 24, 2019
    Assignee: Crestron Electronics, Inc.
    Inventors: Luis Rivera, Michael Campagna, Benjamin Slivka
  • Patent number: 10516362
    Abstract: A motor driving device includes an abnormality detecting portion arranged to detect an abnormality of one of a plurality of position detection signals based on outputs from a plurality of Hall sensors arranged to detect a rotor position of a brushless DC motor, a measuring portion arranged to measure time between neighboring edges of a normal position detection signal when the abnormality detecting portion detects an abnormality, and a drive control portion arranged to control a drive signal for driving the brushless DC motor based on a latest time measurement result of the measuring portion.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: December 24, 2019
    Assignee: Rohm Co., Ltd.
    Inventor: Tetsuo Yamato
  • Patent number: 10516331
    Abstract: The present invention relates to a power conversion device and an air conditioner comprising the same. The power conversion device may include: an interleaved boost converter; a dc terminal capacitor; a load; and a controller for controlling the interleaved boost converter, wherein the controller controls the phase difference between a first boost converter and second boost converter of the interleaved boost converter so that the phase difference is a first phase difference in a first mode, and if a current ripple flowing in the dc terminal capacitor is a predetermined value or greater, the controller enters a second mode and controls the phase difference between the first boost converter and second boost converter so that the phase difference varies. Accordingly, the ripple current flowing into a capacitor disposed at the output terminal of an interleaved boost converter can be reduced.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: December 24, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Seungwoo Chae, Sanghyeon Kim, Jeongeon Oh
  • Patent number: 10511301
    Abstract: A gate drive circuit to prevent a false turn-on phenomenon includes a first, second, third and fourth switching element, and a capacitor. A source of the first switching element is connected to a first voltage, and a drain of the same is connected to the main switching element's gate electrode. A source of the second switching element is connected to a second voltage, and a drain of the same is connected to the gate electrode. A source of the third switching element is connected to the first voltage, and a drain of the same is connected to a first electrode of the capacitor. A source of the fourth switching element is connected to the second voltage, and a drain of the same is connected to the first electrode and to the drain of the third switching element. A second electrode of the capacitor is connected to the gate electrode.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: December 17, 2019
    Assignee: Hitachi, Ltd.
    Inventors: Satoru Akiyama, Ryuusei Fujita
  • Patent number: 10509431
    Abstract: A current mirror arrangement for duplex bidirectional communication between two circuit units may include in each circuit unit two identical transistors with their bases (36, 37) connected together and their bases and their collectors connected to each other respectively. Further, each of the connections between the bases and the collectors may be formed via a MOSFET. The MOSFETs of both circuit units may be connected together. More specifically, the MOSFETs' parasitic diodes of each circuit unit may be arranged in opposite directions with respect to the current system. The pair of MOSFETs in a first of the two circuit units may comprise n-channel enhancement-mode MOSFETs, and the pair of MOSFETs in a second of the two circuit units may comprise p-channel enhancement-mode MOSFETs.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: December 17, 2019
    Assignees: THYSSENKRUPP PRESTA AG, THYSSENKRUPP AG
    Inventor: Zoltán Baranyai
  • Patent number: 10511248
    Abstract: A stepping motor includes a rotor, a stator and three coils. The rotor is two-pole magnetized in a radius direction. The stator is provided with a rotor receiving section for receiving the rotor. The three coils are magnetically connected with the stator. At least one of the three coils is an integrated coil which is integrally formed with the stator by winding a coil around a part of the stator.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: December 17, 2019
    Assignee: CASIO COMPUTER CO., LTD.
    Inventor: Yuta Saito
  • Patent number: 10511239
    Abstract: An angle shift compensation system and method for controlling a sinusoidally driven motor to achieve efficient motion and reduced noise. The motor controller uses the angle shift compensation method to monitor the angle shift between a sinusoidal motor control signal configured to drive the motor and a feedback signal received from at least one position detector indicating the position of the motor rotor with respect to the motor stator. In response, the motor controller proportionally adjusts the amplitude of the motor control signal based on the monitored angle shift to maintain the angle shift substantially equal to an angle shift threshold.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: December 17, 2019
    Assignee: Crestron Electronics, Inc.
    Inventors: Luis J. Rivera, Michael Campagna, Benjamin Slivka