Patents Examined by Jorge L Carrasquillo
  • Patent number: 10270377
    Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: April 23, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Mitsuhiro Sakamoto, Yasuyuki Yokouchi, Daisuke Sonoda, Ryuta Sasaki
  • Patent number: 10260559
    Abstract: A motor driving device comprises a first arithmetic section calculating a rotational speed and a magnetic pole electrical angle of a motor rotor, a current command setting section setting a d-axis current command and a q-axis current command in a rotating coordinate dq system based on a difference between the rotational speed and a target rotational speed, a driving command generating section generating a sinusoidal wave driving command based on the d-axis current command, the q-axis current command, the rotational speed and the magnetic pole electrical angle and a PWM signal generating section. When the rotational speed has a positive value indicating a positive rotational state, the current command setting section sets the q-axis current command of acceleration driving, and when the rotational speed has a negative value indicating a reverse rotational state, the current command setting section sets the q-axis current command of deceleration driving.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: April 16, 2019
    Assignee: SHIMADZU CORPORATION
    Inventor: Junichiro Kozaki
  • Patent number: 10252418
    Abstract: A load parameter setting device includes: a storage unit that stores a plurality of load parameters corresponding to a plurality of types of workpieces to be gripped by the robot respectively; an index calculation unit that calculates, for each of the plurality of stored load parameters, an index for selection of the load parameter of the workpiece gripped by the robot based on a current position and orientation of the robot; and a selection unit that selects the load parameter of the workpiece from among the plurality of load parameters stored in the storage unit based on the calculated index.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: April 9, 2019
    Assignee: FANUC CORPORATION
    Inventor: Kenjirou Morimoto
  • Patent number: 10248090
    Abstract: Provided is a trace data collection system, including: a controller including: a trace start signal transmission determination unit configured to determine a condition for transmitting a trace start signal; and a trace start signal transmission unit configured to transmit the trace start signal; and a motor control device including: a trace start signal reception unit configured to receive the trace start signal; a trace start determination unit configured to set at least reception of the trace start signal as a trace start condition; and a first trace data collection unit configured to collect first trace data relating to a motor.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: April 2, 2019
    Assignee: Kabushiki Kaisha Yaskawa Denki
    Inventor: Naoki Mizuno
  • Patent number: 10239553
    Abstract: A power converter for a three-phase electric rotary machine including first and second winding sets includes: first and second inverters corresponding to the first and second winding sets, respectively; and a control unit including a command calculation unit that calculates first and second voltage command values related to voltages to be applied to the first and second winding sets, and an excess correction unit that corrects first and second voltage command corresponding values corresponding to the first and second voltage command values. When one of the first and second voltage command corresponding values exceeds a limitation value which is set in accordance with a voltage capable of being outputted, the excess correction unit performs an excess correction process for correcting the other of the first and second voltage command corresponding values in accordance with an excess amount over the limitation value.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: March 26, 2019
    Assignee: DENSO CORPORATION
    Inventor: Takashi Suzuki
  • Patent number: 10243498
    Abstract: Ripple power having a first variation range is input into a DC link (DC power supply lines). Buffer power is provided and received between the DC link and a power buffer circuit, so that the DC link outputs DC power having a second variation range smaller than the first variation range. An inverter receives the DC power as an input, and outputs AC power to a motor. A power control unit controls the power buffer circuit and the inverter on the basis of a compensation rate that sets the second variation range. A compensation rate setting unit performs a setting in which the compensation rate when a rotational speed of the motor belongs to any of a plurality of first predetermined ranges is higher than the compensation rate when the rotational speed belongs to a second predetermined range other than the plurality of first predetermined ranges.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: March 26, 2019
    Assignee: Daikin Industries, Ltd.
    Inventor: Shinichi Ishizeki
  • Patent number: 10241490
    Abstract: Improvement of following performance about a target value is achieved in a control system, particularly a feedback control system. A command value correcting device corrects a current-control-cycle command value received with a feedback controller using a current-control-cycle controlled variable of a control target.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: March 26, 2019
    Assignee: OMRON Corporation
    Inventors: Masaki Namie, Mikiko Manabe, Takashi Fujii
  • Patent number: 10243489
    Abstract: In a rotary electrical machine control apparatus, a selection section selects a relay current limiting value or a coil current limiting value depending on whether a plurality of systems are operated or one or more but not all of the plurality of systems are operated. The system is a combination of a winding set, an inverter, and a power supply relay, which correspond to each other. The relay current limiting value is a current limiting value calculated based on the temperature of the power supply relay. The coil current limiting value is a current limiting value calculated based on the temperature of a choke coil.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: March 26, 2019
    Assignee: DENSO CORPORATION
    Inventors: Ryo Kano, Takashi Suzuki
  • Patent number: 10227085
    Abstract: A rotary electrical machine control apparatus is provided which controls drive of a rotary electrical machine having a plurality of winding sets. The apparatus includes inverters that are provided so as to respectively correspond to the winding sets, a temperature detection element that detects a base element that is used as a base for estimation of inverter temperatures, which are temperatures of the inverters, and a control section that has a temperature estimation section that estimates the inverter temperatures based on the base temperature and a temperature change amount generated due to current application to the inverters. On-resistance of the switching elements of the first inverter is smaller than on-resistance of the switching elements of the second inverter. The temperature detection element is disposed in an area, a distance between the area and the first inverter being shorter than a distance between the area and the second inverter.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: March 12, 2019
    Assignee: DENSO CORPORATION
    Inventors: Ryo Kano, Takashi Suzuki
  • Patent number: 10230320
    Abstract: Provided is a motor drive device capable of adjusting a 0-axis current to a desired value. A motor drive device (inverter device 100) for an open winding type motor 200 in which a stator winding wire includes three-phase independent winding wires 210, 220, and 230 includes a plurality of single-phase inverters 160, 170, and 180 provided for each of the winding wires 210 to 230 to individually apply a voltage to a corresponding winding wire, and a controller 150 that controls each of the single-phase inverters 160 to 180. The controller 150 adjusts a 0-axis current to a predetermined value by alternately and repeatedly generating a first period in which a sum of voltages applied to the respective independent winding wires 210 to 230 is set to a value other than zero to offset the 0-axis current and a second period in which the sum of the voltages applied to the respective winding wires 210 to 230 is set to zero.
    Type: Grant
    Filed: January 15, 2016
    Date of Patent: March 12, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshisada Mitsui, Hideki Miyazaki, Seigo Yukutake, Katsuhiro Hoshino
  • Patent number: 10218303
    Abstract: A temperature calculation system for a motor uses a thermal equivalent circuit wherein a yoke is disposed to be fixed onto an inner circumferential surface of a housing of the motor, a coolant chamber in which a coolant flows is formed in a circumferential direction in the housing, and the thermal equivalent circuit including thermal resistance coefficients and temperatures is used. An endothermic amount of the coolant flowing in the coolant chamber of the housing is calculated by using an average temperature of the housing and a preset equation.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: February 26, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: YoungJin Shin, Sanghoon Moon, WoongChan Chae, Hyoungjun Cho, Jung Shik Kim
  • Patent number: 10218168
    Abstract: A method is disclosed providing ground fault circuit interruption protection for a pump motor which includes determining a current difference between at least two leads located on a load side of an electromechanical device, wherein the electromechanical device is configured to mechanically drive a road, and wherein the method further comprises interrupting a flow of current in response to the current difference exceeding a threshold current difference.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: February 26, 2019
    Inventor: Thomas Michael Bangle
  • Patent number: 10211762
    Abstract: A drive circuit for an electric motor having a wound stator and a permanent magnet rotor, includes a controllable bidirectional AC switch connected in series with a stator winding between two terminals for connecting to an AC power supply. First and second position sensors detect the position of magnetic poles of the rotor. A voltage regulating circuit is connected between the two terminals and the controllable bidirectional AC switch and configured to supply power to the first sensor during the positive cycle and to the second position sensor during the negative cycle of the AC power supply such that the controllable bidirectional AC switch is switched between a conductive state and a non-conductive state in a preset manner, thus enabling the stator to rotate the rotor in only one predetermined direction during start-up.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: February 19, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Yue Li, Chi Ping Sun, Bao Ting Liu, En Hui Wang, Fei Xin, Shing Hin Yeung, Xiu Wen Yang, Yan Yun Cui, Shu Juan Huang
  • Patent number: 10209774
    Abstract: A haptically-enabled system includes an actuator that has a first terminal and a second terminal. The second terminal is coupled to a voltage source, and a first switch is coupled to the first terminal and to ground. A second switch is coupled to the actuator. The second switch is parallel to the actuator.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: February 19, 2019
    Assignee: IMMERSION CORPORATION
    Inventors: Douglas George Billington, Kaniyalal Shah, Van Hilton Tran
  • Patent number: 10199972
    Abstract: In a control device for an electric motor (101), a three-phase/two-phase conversion section (203) outputs N d-axis current values and N q-axis current values in each measurement period that is 1/N of a carrier period. An average value calculation section (204) calculates average values of those values. A difference calculation section (205) calculates a difference between a k-th d-axis current value and the average value of the d-axis current values as a d-axis current difference, and calculates a difference between a k-th q-axis current value and the average value of the q-axis current values as a q-axis current difference. A filtering section (206) performs low-pass filtering on each difference, and outputs d-axis and q-axis current correction values. A correction calculation section (207) performs a linear operation of each k-th current value and the corresponding current correction value, and outputs the corrected current values.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: February 5, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Jun Kitagawa, Yasufumi Ogawa, Daiki Matsuura
  • Patent number: 10199961
    Abstract: A control method brakes an electric motor connected to a voltage source. The method involves, in each cycle, the supply of current to the motor, with a delay tret, at an angle ?. The method includes a sequence such that, for every n cycle, the following steps are executed: a) determining the value of a variation in the resistance of the motor during the preceding n cycles of the voltage, b) comparing the value of the variation in resistance with a threshold resistance value Rt, c) increasing in the delay tret if the value of the variation in resistance is lower than the threshold resistance value. The increase in the delay tret is executed in accordance with a gamma command, where the angle ? lies between 50° and 80°.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: February 5, 2019
    Assignee: SCHNEIDER ELECTRIC INDUSTRIES SAS
    Inventors: Delcho Penkov, Grace Gandanegara, Christophe Durand
  • Patent number: 10199965
    Abstract: A magnetic sensor integrated circuit, a motor and an application apparatus. The magnetic sensor includes a magnetic sensor, a signal processing unit, an output control circuit and an output port. The magnetic sensor receives a constant current sense a magnetic polarity of an external magnetic field and output a differential signal. The signal processing unit amplifies the differential signal and eliminates an offset of the differential signal to obtain a magnetic field detection signal. The output control circuit control, at least based on the magnetic field detection signal, the magnetic sensor integrated circuit to operate in at least one a first state in which a current flows from the output port to the outside and a second state in which a current flows from the outside into the output port.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: February 5, 2019
    Assignee: JOHNSON ELECTRIC INTERNATIONAL AG
    Inventors: Guang Jie Cai, Chun Fai Wong, Yue Li, Chi Ping Sun, Bao Ting Liu, En Hui Wang, Fei Xin, Shing Hin Yeung, Xiu Wen Yang, Li Sheng Liu, Yan Yun Cui, Shu Juan Huang
  • Patent number: 10193474
    Abstract: An electric motor vehicle auxiliary unit includes an electronically commutated drive motor comprising motor coils and an electronic commutator arrangement which energizes the motor coils. The electronic commutator arrangement includes a control unit, multiple power semiconductors each of which is controlled by the control unit, a motor current path, a motor current tap arranged in a course of the motor current path, and a high-pass filter arranged between the motor current tap and the control unit. The motor current tap is arranged so that a voltage signal proportional to a motor current IM drops at the motor current tap during a motor energization. The high-pass filter includes an input signal and an output signal. The input signal is the voltage signal and the output signal is a control signal for the control unit. The high-pass filter triggers a pole reversal after a delay following an input of a peak signal.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: January 29, 2019
    Assignee: PIERBURG PUMP TECHNOLOGY GMBH
    Inventor: Toni Henke
  • Patent number: 10173322
    Abstract: An adjusting method is implemented by a control system and is used to adjust a multi-axis robotic arm including a plurality of motors. The adjusting method includes following operations. A decay rate of each motor is analyzed by the control system. When the decay rate of one of the motors exceeds a corresponding first threshold, a residual value of the one of the motors is further analyzed by the control system. When the residual value exceeds a first default value, an output capacity of at least one of the motors is adjusted by the control system.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: January 8, 2019
    Assignee: INSTITUTE FOR INFORMATION INDUSTRY
    Inventors: Hung-Sheng Chiu, Hsiao-Yu Wang, Hung-An Kao, Hsing-Hsuan Yang, Hsiao-Chen Chang
  • Patent number: 10174553
    Abstract: The disclosed method enables control of an actuator for winding a blackout screen around a winding shaft. The actuator includes at least one electric motor. The method includes: at least one step that involves using an electronic unit to detect screen locking, during lowering or raising, by detecting a torque exerted by the motor on the winding shaft, the torque being determined on the basis of a current for supplying power to the motor; and a step that involves stopping the motor when a signal representing the detected current is greater than a threshold value. The electronic unit is parametrizable. Moreover, the method includes at least one additional step, used when the signal representing the detected current is less than the threshold value and involving detecting, on the basis of the detected current, a localized change in the shape of the screen, during lowering, by using the same electronic unit.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: January 8, 2019
    Assignee: SOMFY SAS
    Inventor: David Mugnier