Patents Examined by Cortez M Cook
  • Patent number: 10612554
    Abstract: A method and a device are provided for controlling a rotation angle of a swinging head of a fan. The method may be applied in a fan adopting a brushless motor. An angle feedback device is arranged on the swinging head, and the swinging head is driven by the brushless motor to rotate. The device may acquire a parameter outputted by the angle feedback device, where the parameter varies with rotation of the swinging head. The device may calculate a current rotation angle of the swinging head according to the parameter outputted by the angle feedback device and a preset correspondence relationship between parameters and angles. The device may control the swinging head to rotate according to the current rotation angle of the swinging head and a preset target rotation angle.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: April 7, 2020
    Assignees: Beijing Xiaomi Mobile Software Co., Ltd., Beijing Smartmi Technology Co., Ltd.
    Inventors: Jiuping Yu, Dongxu Liu
  • Patent number: 10608561
    Abstract: Provided is a control device of an AC motor, including: an inverter including a switching element; switching control means for controlling the switching element; and phase detection means for detecting a rotor phase of an AC motor, wherein the switching control means controls the switching element so that a voltage waveform of the inverter has half-wave symmetry in an interval of a width centering on a fundamental voltage phase of 180 deg±180 deg, the switching control means controls the switching element so that a harmonic voltage phase of the inverter becomes variable on the basis of a fundamental voltage-rotor phase difference which is a difference between a fundamental voltage phase and the rotor phase of the AC motor, and the switching control means controls the switching element so that a harmonic voltage amplitude of each order of the inverter is inversely proportional to the order.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: March 31, 2020
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Sumita, Yoshitaka Iwaji
  • Patent number: 10601220
    Abstract: A window control device for a vehicle, and a method therefor, include a driving motor configured to drive a window glass, a first sensor configured to generate one pulse signal corresponding to a rotation of the driving motor, a second sensor configured to sense a voltage signal provided to the driving motor, and a controller configured to perform a safety function based on the one pulse signal generated by the first sensor and the voltage signal sensed by the second sensor. Although a fault occurs in one of two hall sensors, the window control device may normally perform the safety function.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: March 24, 2020
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, DY AUTO Corporation
    Inventors: Kyong Ho Shon, Kil Sang Cho, Sug Woo Shin, Baek Yong Kim, Bo Sung Jo, Chang Seong Kim
  • Patent number: 10594235
    Abstract: An axial flux motor has a rotor mounted about an axis of rotation. Permanent magnets are mounted on a first axial face of the rotor and a predetermined encoder pattern is provided on the surface of a second axial face of the rotor. A stator is positioned on one side of the rotor adjacent to the first axial face of the rotor. A sensor is mounted on the other side of the rotor adjacent to the second axial face of the rotor. The sensor outputs signals corresponding to the encoder pattern on the surface of the second axial face of the rotor. A motor control system is coupled to receive the signals from the sensor and calculates a speed of rotation of the rotor based on the signals from the sensor. In addition, the motor control system may calculate rotor position information, relative or absolute, based on the encoder pattern.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: March 17, 2020
    Inventors: David Morse, Eric Ginzburg
  • Patent number: 10594232
    Abstract: The present invention provides an improved hybrid motor starter that extends the expected life of the main motor contacts of a standard contactor by reducing arcing during opening and closing of the main motor contacts and permits the use of physically smaller solid state switching devices and secondary contacts that have electrical ratings significantly lower than the standard contactor. The use of smaller solid state switching device and secondary contacts that have lower electrical ratings is permitted by minimizing the time at which these devices are exposed to full motor currents.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: March 17, 2020
    Assignee: Schneider Electric USA, Inc.
    Inventors: Kevin M Jefferies, Benjamin W Edwards, Alan Freeman, Richard Karl Weiler
  • Patent number: 10591889
    Abstract: The present invention provides a configuration which enables an improvement in the workability of wiring of a sensor in a servo system. An encoder detects the operation of a motor driven by a servo driver, and generates a feedback signal indicating the detected operation. Further, the encoder receives detected signals output from sensors for detecting an object driven by the motor via sensor cables. The encoder outputs the feedback signal and the input detected signals to the outside.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: March 17, 2020
    Assignee: OMRON Corporation
    Inventor: Takeshi Kiribuchi
  • Patent number: 10566920
    Abstract: A control device for an AC rotary machine includes an AC rotary machine having x-phase windings where x is at least three, an angle detector, a current detector, a voltage command calculator, and a power converter, wherein, when a current of at least one phase of the x phases is detectable and currents of at most (x?1) phases are undetectable at a present current detection timing, the current detector estimates the currents of the (x?1) phases that are undetectable at the present current detection timing by calculation on the basis of detected currents of x phases obtained at a past current detection timing, the detected current of the single phase that is detectable at the present current detection timing, and an angle variation amount from the past current detection timing to the present current detection timing.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: February 18, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Akira Furukawa
  • Patent number: 10541632
    Abstract: The present invention relates to a circuit arrangement and to a method for sensorless commutation of electronically commutated synchronous machines such as, for example, EC motors, wherein the terminal values at the connection terminals of the synchronous machine are processed by means of a rotor position estimator based on the EMF of the synchronous machine and of a known motor model preferably in a PLL structure for sensorless determination of rotor position information, and said information is used for commutation.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: January 21, 2020
    Assignee: ebm-papst Mulfingen GmbH & Co. KG
    Inventor: Fabian Schneider
  • Patent number: 10536100
    Abstract: A system according to the present disclosure includes a motor driver module and a motor position determination module. The motor driver module is configured to measure current supplied to a motor. The motor position determination module is configured to determine a first position of the motor at a first time when power supply to the motor is initially discontinued based on ripples in the current supplied to the motor during a first period before the first time. The motor position determination module is configured to determine a second position of the motor at a second time when the motor stops rotating after power supply to the motor is discontinued based on the first position of the motor and a rotational speed of the motor at the first time.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: January 14, 2020
    Assignee: GENTHERM INCORPORATED
    Inventors: Patrick Jordan, Dusko Petrovski
  • Patent number: 10526010
    Abstract: An electric power steering apparatus includes a control substrate that controls a poly-phase motor having a multi-system motor winding, including a temperature sensor that detects a substrate temperature of said control substrate; and a coil temperature estimating section that obtains coil calorific values of respective phases of said poly-phase motor and a substrate calorific value of said control substrate by a motor current of said phase, and estimates a coil temperature of said phase by said coil calorific value, said substrate calorific value and said substrate temperature based on a heat transfer phenomenon between said respective phases that is caused by a difference in temperature between coils of said respective phases and a heat transfer phenomenon between said coil and said control substrate.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: January 7, 2020
    Assignee: NSK LTD.
    Inventors: Takahiro Tsubaki, Haruhiko Kamiguchi, Tomohiro Miura, Nobuaki Kogure
  • Patent number: 10530288
    Abstract: A motor drive apparatus which drives a motor includes inverter modules equal in number to phases of the motor. Each of the inverter modules includes a plurality of switching element pairs. Each of the switching element pairs is defined by two switching elements connected in series. In each of the inverter modules, the plurality of switching element pairs are connected in parallel, and each of resistance values of gate resistors connected to the switching elements is set for the corresponding switching element connected thereto.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: January 7, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takuya Shimomugi, Yosuke Shinomoto, Katsuhiko Saito, Norikazu Ito
  • 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: 10511249
    Abstract: A motor driving device controls driving of an inverter device, detects current values in two phases, and compensates a value. The motor driving device detects current values in two phases, namely, a maximum phase current value and a minimum phase current value, within a single cycle of a PWM carrier frequency. The motor driving device compensates a value obtained by subtracting an absolute value of a difference between two absolute values, namely, the detected maximum phase current value and minimum phase current value, from the smaller value of the absolute values, as the offset current component.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: December 17, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masahiro Seo, Toshiyuki Ajima, Shigehisa Aoyagi, Takafumi Hara, Masaki Kashima, Yawara Kato
  • 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: 10505486
    Abstract: A motor and control method for making the generating and regeneration efficiency higher than before are provided. A motor including a rotor, a storage battery and a capacitor (a source) is provided to charge a produced electrical energy, a SR motor portion rotates the rotor by magnetic force produced with a current supplied by the source and generates by converting rotational energy of the rotor into electrical energy, current sensors measure the currents supplied to excitation coils, and a semiconductor switching control circuit for driving and generation to maintain the rotation by increasing the current with supply of electrical energy from the source to the excitation coils if the currents measured by the current sensors fall below a predetermined lower limit for making the rotor rotate due to the charging.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: December 10, 2019
    Inventor: Toshimi Matsunobu
  • Patent number: 10505472
    Abstract: An electronic speed control system and method is disclosed to control motors that power a load. The electronic speed control system is configured to monitor the motors, accept user commands for the motors, to process these inputs along with various motor parameters and/or models, and to generate motor commands to send to the motors. A field oriented control method continuously monitors voltages and currents from each motor phase; accesses the motor parameters; uses a model of the motor to calculate motor rotor flux, angle and speed based on the stator voltages and currents and the motor parameters; and generates motor commands for controlling the motor based on the user commands and the calculated values. The electronic speed control system can also control external accessories, and/or communicate with external applications which can include a motor identification system that can provide the motor parameters and model for the motor.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: December 10, 2019
    Assignee: MODERN PROPULSION, LLC
    Inventors: Asif J Ahmed, Brian J Celenza
  • Patent number: 10491142
    Abstract: A servo amplifier including an encoder for detecting rotation of a servomotor (11), a servo amplifier (13) for performing feedback control of the rotation of the servomotor based on a count value (hereinafter referred to as an “encoder value”) of the encoder, and an amp control section (17) for controlling operation of the servo amplifier, wherein the amp control section sends an initialization instruction for initializing the encoder to the servo amplifier in a state of fixed cycle connection over a servo network between the servo amplifier and the encoder when an error occurs with the encoder. The servo amplifier performs initialization of the encoder without disconnecting the servo network when receiving the initialization instruction sent from the amp control section.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: November 26, 2019
    Assignee: FUJI CORPORATION
    Inventors: Naohiro Kato, Mizuho Yamamoto
  • Patent number: 10483894
    Abstract: A control system for an electric motor (10) comprises a current sensing means (14) arranged to produce a current sensing output indicative of electric current in the motor, current control means (20) arranged to receive a current demand and to control voltages applied to the motor, and correction means (26) arranged to receive the current sensing output and the current demand, and use them to generate a correction signal. The current control means (20) is arranged to receive the correction signal and to use the correction signal to correct the voltages applied to the motor.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: November 19, 2019
    Assignee: TRW LIMITED
    Inventor: Christoper David Dixon
  • Patent number: 10471951
    Abstract: Propulsion for a vehicle is provided by a hybrid powertrain that includes a torque converter coupled to an electric machine and selectively coupled to an engine. The hybrid powertrain further includes a controller programmed to, responsive to a loss of speed feedback of the electric machine while the engine is disconnected from the torque converter and the torque converter is open, operate one or more of a gearbox, the electric machine, and the engine based on an impeller speed of the torque converter derived from a torque of the electric machine and a speed of the vehicle.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: November 12, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Rajit Johri, Fazal Urrahman Syed
  • Patent number: 10476414
    Abstract: A driving circuit for an electric motor including multiple windings includes a sensing circuit to sense motor winding currents. A motor rotation angle signal is generated from the sensed currents and motor control voltages are generated as a function of the motor rotation angle signal. The motor windings are driven with motor drive voltages obtained by injecting into the motor control voltages injection pulses. The sensed currents include both torque components and injection components. The motor rotation angle signal is generated as a function of the injection components of the sensed currents.
    Type: Grant
    Filed: December 13, 2016
    Date of Patent: November 12, 2019
    Assignees: STMicroelectronics Design and Application S.R.O., STMicroelectronics S.r.l.
    Inventors: Jiri Ryba, Gianluigi Forte, Andrea Spampinato