Patents Examined by Eduardo Colon Santana
  • Patent number: 10411461
    Abstract: Provided are a protection circuit for a brushless DC motor, and a control device. The protection circuit is applied to a control device for a brushless DC motor, the control device including a main control chip and a protection circuit for driving a brushless DC motor. The protection circuit includes a sampling signal input end (RNF), a first resistor (R1), a first capacitor (C1), a second capacitor (C2), a comparator (IC2) and a switching element (IC1), connected together in a preset structure.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: September 10, 2019
    Assignee: GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI
    Inventors: Lina Yao, Weilin Guo, Wenxian Wu, Anyong Hu
  • Patent number: 10411622
    Abstract: The control part includes: a gate control voltage output unit that is configured to output a drive signal which switches a switching element according to a Hall edge that forms each of six Hall stages which are represented by a combination of electric potentials of position detection signals that are outputs of a plurality of sensors; a counter value acquisition unit that is configured to acquire a counter value which is a time period of the Hall stage and which is represented by a time period between two Hall edges that form each of the Hall stages from the position detection signal; and a switching control unit that is configured to determine a value obtained by multiplying a previous counter value of each of the Hall stages by a preset correction coefficient as a delay time of each of current Hall edges and that allows the gate control voltage output unit to output a drive signal according to each of the Hall edges which are corrected by the delay time.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: September 10, 2019
    Assignee: Mitsuba Corporation
    Inventor: Takeshi Ikeda
  • Patent number: 10405455
    Abstract: A rack fan speed regulation method based on a fan table provided in a node BMC is provided, which includes: providing a fan table reflecting a rack fan speed regulation policy in a BMC of each node server; acquiring, by the node BMC, a parameter reflecting a heat dissipation condition of a node motherboard; and acquiring, by the node BMC based on the speed regulation policy, a fan rotation speed corresponding to the parameter rapidly. With the rack fan speed regulation method, the node BMC can rapidly obtain parameters reflecting a heat dissipation condition of a node motherboard, and rapidly obtain a corresponding fan rotation speed based on the speed regulation policy. In this case, heat dissipation of the node can be controlled effectively in a timely manner, thereby ensuring heat dissipation of the rack.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: September 3, 2019
    Assignee: INSPUR ELECTRONIC INFORMATION INDUSTRY CO., LTD.
    Inventor: Xiao Su
  • Patent number: 10396698
    Abstract: First pulse width modulation control is a control of generating a first pulse width modulation signal for a plurality of switching elements by comparison of modulated waves of voltage commands in phases based on a torque command for a motor with a carrier voltage, and performing switching of the plurality of switching elements. Second pulse width modulation control is a control of generating a second pulse width modulation signal for the plurality of switching elements based on a modulation factor of a voltage and a voltage phase based on the torque command and the number of pulses per unit period of an electrical angle of the motor, and performing switching of the plurality of switching elements. An electronic control unit is configured to switch the plurality of switching elements between the first pulse width modulation control and the second pulse width modulation control at irregular time intervals.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: August 27, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Toshihiro Yamamoto, Kenji Yamada
  • Patent number: 10389280
    Abstract: A power inverter for driving an electric machine is configured to apply a voltage to the electric machine based on a high-frequency injection current. Three phase currents are measured and input into a current controller. A voltage command output from the current controller is monitored using a discrete Fourier transform to determine a positive and negative sequence voltage of the voltage command. The sequence voltages are compared to expected positive and negative sequence voltages. A loss of connection diagnostic is output if a magnitude of the difference between the expected and actual sequence voltages is greater than a predetermined threshold.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: August 20, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Wei Xu, Fazal Urrahman Syed
  • Patent number: 10389283
    Abstract: A motor drive apparatus includes a drive unit to supply motor coils with sinusoidal drive signals, a signal output unit outputs signals that change with rotation of a rotor, and a control unit. The control unit acquires first information relating to the sinusoidal drive signals at a timing of change of a corresponding one of the output signals in a case where there is no follow-up delay of the rotor relative to the drive signals. When the corresponding one of the output signals is changed, the control unit acquires second information relating to the sinusoidal drive signals at a timing of change of the corresponding one of the output signals in a case where there is a follow-up delay of the rotor relative to the drive signals. The control unit corrects the follow-up delay of the rotor based on a determined difference between the first and second information.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: August 20, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yoshihiro Mizuo
  • Patent number: 10389289
    Abstract: A method of controlling a motor in a motor control system is provided. The method determines a control voltage budget value based on an operating region of the motor. The method adjusts a supply voltage signal based on the control voltage budget value. The method determines a motor voltage command based on the adjusted supply voltage signal. The method applies a voltage corresponding to the motor voltage command to the motor in order to generate a desired motor torque.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: August 20, 2019
    Assignee: Steering Solutions IP Holding Corporation
    Inventors: Julie A. Kleinau, Siddharth Ballal
  • Patent number: 10389265
    Abstract: A circuit element includes an upper switching device, a lower switching device, an upper diode device, and a lower diode device. An upper drain is connected to a first terminal connected to a positive electrode of a power supply, and an upper source is connected to a third terminal. A lower drain is connected to a fourth terminal, and a lower source is connected to a second terminal connected to a negative electrode of the power supply. An upper anode is connected to the fourth terminal, and an upper cathode is connected to the first terminal. A lower anode is connected to the second terminal, and a lower cathode is connected to the third terminal. The third terminal and the fourth terminal are arranged so as to be able to be short-circuited outside of a package.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: August 20, 2019
    Assignees: Nidec Corporation, ROHM Co., Ltd.
    Inventors: Masaki Yoshinaga, Masato Nakanishi, Yasuo Ishiyama, Toru Takahashi, Takumi Okada, Katsuhiko Yoshihara
  • Patent number: 10389281
    Abstract: A sort buffer includes a phase sector determination circuit, a phase sector update circuit, and a phase sector completion circuit. The phase sector determination circuit is configured to determine a phase sector corresponding to a phase of a first sine and cosine sample pair received from an encoder or resolver. The phase sector update circuit is configured to determine whether a second sine and cosine sample pair corresponding to the phase sector is stored in a lookup table (LUT) and, in response to a determination that a second sine and cosine sample pair corresponding to the phase sector is not stored in the LUT, store the first sine and cosine sample pair in the LUT. The phase sector completion circuit is configured to determine whether the LUT has stored, for each of a plurality of phase sectors, a corresponding sine and cosine sample pair.
    Type: Grant
    Filed: October 20, 2016
    Date of Patent: August 20, 2019
    Assignee: Texas Instruments Incorporated
    Inventors: Martin Staebler, Ferdinand von Molo
  • Patent number: 10378648
    Abstract: A control circuit controls driving of a motor to switch over a shift range. A target rotation speed setting part sets a target rotation speed of the motor. A rotation speed detection part detects a present rotation speed, which is an actual rotation speed, of the motor. A rotation speed error calculation part calculates a rotation speed error, which is an error between the target rotation speed and the present rotation speed. A request torque calculation part calculates a request torque for the motor based on the rotation speed error. A phase lead correction value calculation part calculates a phase lead correction value of a current supply phase relative to a rotation phase of a rotor of the motor based on the request torque.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: August 13, 2019
    Assignee: DENSO CORPORATION
    Inventor: Jun Yamada
  • Patent number: 10381966
    Abstract: A PN-busbar common system includes motor drive devices for a plurality of motors, each of which is supplied with power from a common PN-busbar, where the motor drive devices individually drive the corresponding motors. Each of the motor drive devices executes a regenerative control on a basis of a regenerative-control start voltage, and controls to stop the regenerative control on a basis of a regenerative-control stop voltage, and also individually calculates a regenerative load ratio to control to enable or disable the regenerative control on a basis of a result of a comparison between a calculated regenerative load ratio and a set regeneration-capable load ratio.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: August 13, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takashi Miyasaka, Yasuhiro Endo
  • Patent number: 10381897
    Abstract: A bus bar or similar high current conductor may be sheathed in a high relative permeability material formed in layers to both increase the inductance of that conductor and to provide a capacitance and resistance useful for forming a low pass filter to reduce the rise time of the voltage signals on the bus bar such as can be damaging to motor insulation and the like.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: August 13, 2019
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Daniel Colin Ludois, Andy Lee Schroedermeier
  • Patent number: 10374545
    Abstract: A rotor temperature monitoring method and system for a permanent magnet synchronous motor are provided. According to the method and system, an a-phase line current and a b-phase line current of a stator of a permanent magnet synchronous motor are obtained as a first line current and a second line current; further, a line voltage between the a-phase and the b-phase of the stator is obtained and a rotating speed of the rotor of the permanent magnet synchronous motor is obtained; and then, the first line current, the second line current, the line voltage, the rotating speed of the rotor, an inductance parameter of the permanent magnet synchronous motor and a temperature characteristic equation of a permanent magnet of the rotor are substituted into a preset rotor permanent magnet temperature expression to calculate and obtain the temperature of the rotor.
    Type: Grant
    Filed: September 2, 2015
    Date of Patent: August 6, 2019
    Assignee: CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD.
    Inventors: Jianghua Feng, Jing Shang, Junfeng Xu, Yuliang Wen, Xiong Liu, Chaoyang Zhang, Lei Xiao, Yaping He, Yonghui Nan, Hanfeng Zheng
  • Patent number: 10371258
    Abstract: A position sensor mounted in an actuator includes a magnetic detecting element for detecting the position of a shaft, and a temperature detecting element for detecting intra-sensor temperature which is used for correction of the temperature characteristics of the magnetic detecting element, the magnetic detecting element and the temperature detecting element being built therein. A control device for the actuator acquires both the temperature-corrected position of the shaft and the intra-sensor temperature from the position sensor, and uses them for control of the actuator.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: August 6, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Satoshi Kawamura, Kenta Hatano
  • Patent number: 10374527
    Abstract: A circuit for delivering electrical energy to an AC mains connection is disclosed. The circuit includes a voltage source and a switch connected between the voltage source and the AC mains connection. The switch operates to transfer current from the voltage source to the AC mains. The circuit further includes a controller to control the switch. The controller operates to generate a simulated signal that represents a waveform of the AC mains without any distortion present on the waveform of the AC mains.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: August 6, 2019
    Assignee: Beckman Coulter, Inc.
    Inventors: Jason L. Hessler, Ronald T. Keen
  • Patent number: 10374528
    Abstract: A back electromotive force of a rotating motor is converted into a voltage for a load by driving, in accordance with a duty cycle, at least one switching circuit that couples the back electromotive force to a load through a rectifying circuit. An error signal is generated that is a difference between the load voltage and a reference voltage. The duty cycle is controlled as a function of the error signal to cause the load voltage to approach the reference voltage.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: August 6, 2019
    Assignee: Seagate Technology LLC
    Inventors: Binh Kim Lieu, Mark Lowell Elliott, Raye A. Sosseh
  • Patent number: 10372099
    Abstract: Method for configuring an actuator (2) for the operation of a moving element (3) for closure, solar protection, privacy or screening, said actuator comprising a gear motor (4) and a gear motor electronic control unit (5), said electronic control unit incorporating a memory (51) in which at least one range of travel of the element has been pre-recorded, and said method comprising a step for the relative modification of the magnitude of at least one range.
    Type: Grant
    Filed: May 22, 2015
    Date of Patent: August 6, 2019
    Assignee: SOMFY SAS
    Inventors: Eric Barralon, Jean-François Bocquet
  • Patent number: 10362914
    Abstract: Disclosed herein are a cleaner and a control method thereof. The control method of the cleaner includes: supplying predetermined rearrangement power to a motor for a predetermined time period; detecting a position of a rotor using a hall sensor; and supplying start-up power according to the detected position of the rotor.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: July 30, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Nam Su Kim, Wook Jin Lee, Bu Mun Jung, Young Kwan Kim
  • Patent number: 10361030
    Abstract: Start capacitor assemblies and methods for operating electric motors are described. In one example, a start capacitor assembly for connection to an electric motor includes a film capacitor and a resistor. The film capacitor has a first terminal and a second terminal.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: July 23, 2019
    Assignee: NUEVA GENERACION MANUFACTURAS S.A. DE C.V.
    Inventor: Francisco Javier Curiel
  • Patent number: 10361648
    Abstract: To avoid control failure resulting from startup of a PMSM that is windmilling, initial speed and position are determined before startup. A controller uses a FOC routine having a speed PI control loop, field-weaken control, a current PI control loop, and a speed observer. When the controller receives an instruction to start the PMSM, it delays startup and executes an “estimation” stage, in which the controller executes the FOC routine but with the speed PI control loop and the field-weaken control disabled. The estimation stage is repeated multiple times, with estimates converging to actual speed and position through successive iterations. When estimated speed and position values have stabilized, the motor is started using the estimates as initial speed and position for driving the PMSM. The FOC routine, with the speed PI control loop and the field-weaken control enabled, is used to drive the PMSM.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: July 23, 2019
    Assignee: MICROCHIP TECHNOLOGY INCORPORATED
    Inventor: Weizi Wang