Patents Examined by Antony M. Paul
  • Patent number: 11962222
    Abstract: The present invention relates to a layout and a drive method of an in-wheel motor used for driving a vehicle. In a vehicle using a direct drive in-wheel motor, there is a problem that mechanical loss is caused by a load on an axle due to a weight of a vehicle body, a direction change during traveling, and the like. A stator of the direct drive in-wheel motor is eccentrically disposed in a half peripheral part on the front side of the vehicle body. A terminal of a stator that generates a rotational torque reaction conflicting with a load applied to an axle during traveling is preferentially activated. A mechanical loss of a direct drive in-wheel motor due to a load on an axle during traveling of a vehicle is reduced.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: April 16, 2024
    Inventor: Shigeki Tada
  • Patent number: 11962259
    Abstract: A drive system is disclosed which applies to a six-phase integrated permanent magnet synchronous motor. The motor includes a set of six-phase half-bridge drive system and a thermistor monitoring system for monitoring the temperature of the six-phase half-bridge drive system. Aiming at the problem that the six-phase drive system is complicated and has many components, the invention adopts a grouping method to divide the six-phase drive system into two sets of three-phase drive half-bridges. To provide stability for long term operation, a thermistor is used to accurately measure the temperature changes.
    Type: Grant
    Filed: December 27, 2021
    Date of Patent: April 16, 2024
    Assignee: CITY UNIVERSITY OF HONG KONG
    Inventors: Chunhua Liu, Senyi Liu
  • Patent number: 11955910
    Abstract: The invention relates to a method (400) for regulating an electric machine (190), comprising a harmonic filter (150), said harmonic filter (150) comprising a second filter (142) and a filter output transformer (132). The method has the steps of: ascertaining (410) a feedback variable (Idq); determining (414) a filter specification variable (FV); filtering (415) the filter specification variable (FV); ascertaining (417) a filtered feedback variable without harmonic components (IdqFunda); and energizing (480) at least one winding of the electric machine (190) on the basis of the filtered feedback variable without harmonic components (IdqFunda).
    Type: Grant
    Filed: October 21, 2020
    Date of Patent: April 9, 2024
    Assignee: Robert Bosch GmbH
    Inventors: Maximilian Manderla, Michele Hirsch, Sebastian Paulus, Timo Kuehn, Wei-Lung Lee, Florian Malchow
  • Patent number: 11949312
    Abstract: The present invention relates to a magnetic guiding device having a stator and a slide movable along a guiding direction relative to the stator, the stator and the slide being magnetized or magnetizable such that a magnetic field extending through the stator and the slide generates a magnetic supporting force on the slide acting along the guiding direction. To improve the running properties of the slide by avoiding differential slip, jerking and varying friction, according to the invention, the magnetic field extending through the stator and the slide simultaneously generates a magnetic pretensioning force which urges the slide and the stator against each other.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: April 2, 2024
    Assignee: PHYSIK INSTRUMENTE (PI) GMBH & CO. KG
    Inventors: Bernhard Guddei, Michael Hohmann, Daniel Göll
  • Patent number: 11942890
    Abstract: The magnetic pole position of the rotor is estimated with high accuracy at the initial start of a three-phase motor of the sensorless system. Semiconductor device for driving and controlling the three-phase motor of the sensorless system have a detector connected to the three-phase output nodes of the inverter circuit and the virtual neutral point (or neutral point), and detecting a voltage generated in the output node of the non-energized phase of the three-phase. Controller applies the initial drive voltage by the inverter circuit to any two phases of the three-phase motor based on the estimated position of the magnetic pole of the rotor in the stop state. Controller estimates the position of the rotor based on a difference voltage detected by the detector in a driving voltage applying period and a regeneration period immediately after or immediately before the driving voltage applying period.
    Type: Grant
    Filed: September 20, 2021
    Date of Patent: March 26, 2024
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Satoshi Narumi, Minoru Kurosawa, Takeshi Ohtsuki
  • Patent number: 11929645
    Abstract: A direct drive drive actuator includes a base structure and a driven structure that is journally supported and translatable relative to the base structure. The driven structure is disposed in a fixed spatial relationship to the base structure. A plurality of first pole arrays is disposed on the driven structure. A plurality of second pole arrays, corresponding in number to the plurality of first pole arrays is disposed on the base structure. An electrical power source is provided. A controller is coupled to the power source and the first plurality of pole arrays and the second plurality of pole arrays, wherein the controller is configured to selectively electrically energized windings of the first plurality of pole arrays and the second plurality of pole arrays such that an electro-magnetic force is formed between poles of the first plurality of pole arrays and poles of the second plurality of pole arrays.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: March 12, 2024
    Assignee: GENERAL DYNAMICS LAND SYSTEMS—CANADA CORPORATION
    Inventor: Mark Gojkovic
  • Patent number: 11929696
    Abstract: A driving and resistance control system for a permanent-magnet synchronous motor is disclosed. A control device includes a processing unit, a motor driving circuit, a resistance controller, and an interlock switch. In a first operation mode, the interlock switch makes the motor driving circuit and the permanent-magnet synchronous motor open-circuiting, and connecting stator windings of the permanent-magnet synchronous motor to the resistance controller, and under this condition, the external rotor of the permanent-magnet synchronous motor is rotated by spinning of a flywheel, so that the permanent-magnet synchronous motor is operating in a generator mode to generate a resisting force to the flywheel by mesas of a resistance generation device.
    Type: Grant
    Filed: May 6, 2022
    Date of Patent: March 12, 2024
    Inventor: Yu-Yu Chen
  • Patent number: 11923727
    Abstract: A motor has windings and a control device, which applies appropriately one-way current to each of the windings. Two full-pitch windings, which are located adjacently to both ends of an A-phase stator magnetic pole, and driving transistors are connected in series to each other to supply an A-phase current component, thereby exciting an A-phase magnetic flux component passing through the A-phase stator magnetic pole, resulting in generation of torque. This excitation is also applied to other phases. The respective stator magnetic poles can be excited selectively, and voltages across both ends of the serially connected windings become a voltage for corresponding magnetic flux components which should be provided by the windings, thus providing a more simplified motor structure and higher motor performance. The windings and transistors can be used commonly in two phases, providing an improved usage rate, thus making the motor more compact in size and reducing manufacturing cost.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: March 5, 2024
    Inventor: Masayuki Nashiki
  • Patent number: 11916372
    Abstract: A motor protection device (1) that includes an interrupter unit (11, Q1, Q2) for electrically connecting a power supply (Vcc) and an electric motor (M) in an operation mode and electrically disconnecting the power supply (Vcc) and the electric motor in an alternative overload mode. The motor protection device further includes an overload detection unit (12) that is configured to monitor a motor current and to control the interrupter unit (11, Q1, Q2) to switch from the operation mode into the overload mode if the motor current indicates an overload condition of the electric motor (M) in the operation mode. The motor protection device (1) further includes a recovery detection unit (13) that is configured to monitor a motor temperature and to control the interrupter unit (11, Q1, Q2) to switch from the overload mode back into the operation mode if the motor temperature indicates a recovery from the overload condition.
    Type: Grant
    Filed: October 2, 2020
    Date of Patent: February 27, 2024
    Assignee: BELIMO HOLDING AG
    Inventors: Maurizio Gaeta, Thomas Gay, Stephan Haag
  • Patent number: 11916503
    Abstract: When the duty command value is less than or equal to a threshold value, the motor control device performs the complementary PWM control, and when the duty command value is greater than the threshold value, it sets, for the first element, a first period in which the first element remains turned on and a second period in which control is performed with a corrected duty cycle to turn off the first element for a longer period, and performs average PWM control of which average duty cycle in a total period of the first and second periods is same as a set duty cycle. The motor control device turns on the second element while the first element is turned off in the second period.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: February 27, 2024
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hisashi Yamamoto, Yukihiko Yato
  • Patent number: 11916505
    Abstract: A method for operating a drive device for a motor vehicle is provided, wherein the drive device has an electric machine which is electrically connected to a DC power source via an inverter controlled by means of pulse width modulation. The pulse width modulation is performed depending on a predetermined duty cycle. When the duty cycle that is less than a threshold value, a continuous pulse width modulation is used to control the inverter. The pulse width modulation is switched to a discontinuous pulse width modulation when the threshold value is exceeded. A motor vehicle and a drive device for a motor vehicle are also provided.
    Type: Grant
    Filed: February 25, 2021
    Date of Patent: February 27, 2024
    Assignee: AUDI AG
    Inventors: Martin Adam, Alexander Tkatschenko
  • Patent number: 11901854
    Abstract: An arrangement for detecting a direction of rotation of a multi-phase electric motor includes a plurality of single-phase converters. Each single-phase converter of the plurality of single-phase converters supplies one phase of the multi-phase electric motor with current. The arrangement also includes two sensor units that are configured to determine actual values of the phase currents of the multi-phase electric motor and to transmit the actual values to the plurality of single-phase converters. The arrangement also includes a monitoring and control unit in each converter of the plurality of single-phase converters. The monitoring and control unit is configured and programmed to determine the direction of rotation and a speed of rotation of the multi-phase electric motor from the actual values.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: February 13, 2024
    Assignee: Rolls-Royce Deutschland Ltd & Co KG
    Inventor: Marco Bohlländer
  • Patent number: 11894789
    Abstract: Provided is a power conversion device including an all-solid-state battery, a power converter that converts power between the all-solid-state battery and a load, and a thermal coupling member that thermally couples the all-solid-state battery and the power converter.
    Type: Grant
    Filed: May 15, 2020
    Date of Patent: February 6, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventor: Seiji Kamata
  • Patent number: 11894784
    Abstract: A power conversion device includes: a power conversion circuit that outputs power to a power output terminals to which electric cables of a power cable for supplying AC power to a motor is connected; an encoder circuit that outputs encoder information on the basis of angle information input to an information input terminal and supplied from signal lines of a signal transmission cable; a control unit that outputs a control signal that controls the power conversion circuit on the basis of the encoder information supplied from the encoder circuit; a shield terminal connected to a shield of the signal transmission cable which is electrically connected to a ground line of a power cable on the motor side; and a determination unit that detects a current input to the shield terminal and flowing through the shield of the signal transmission cable, and outputs disconnection detection information for disconnection in the shield.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: February 6, 2024
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Nobuyuki Haruna, Keita Takahashi, Yusuke Yamakaji, Masaomi Washino
  • Patent number: 11888422
    Abstract: A motor can be driven so that the total loss of a loss of a motor and a loss of an inverter decreases. In a relationship between an optimum carrier frequency at which the total loss is minimized and a torque of a motor M, a lowest value of the optimum carrier frequency is derived, and a relationship between the torque of the motor M and the carrier frequency is determined to have a portion in which the carrier frequency is substantially constant or decreases as the torque of the motor M increases in a range equal to or less than the torque of the motor M corresponding to the lowest optimum carrier frequency and a portion in which the carrier frequency is substantially constant or increases as the torque of the motor M increases in a range equal to or more than the torque of the motor M corresponding to the lowest optimum carrier frequency.
    Type: Grant
    Filed: July 1, 2019
    Date of Patent: January 30, 2024
    Assignee: NIPPON STEEL CORPORATION
    Inventor: Yasuo Ohsugi
  • Patent number: 11880177
    Abstract: A controller for controlling an electric motor includes an interface having a first connection pole and a second connection pole, wherein the interface is designed to connect a measuring resistor and to connect a digital encoder. The controller is designed to evaluate a resistance value of the measuring resistor in order to monitor the temperature of the electric motor when the measuring resistor is connected to the interface, and the controller is designed to receive digital data from the digital encoder at the interface when the digital encoder is connected to the interface.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: January 23, 2024
    Assignee: Lenze Automation GmbH
    Inventor: Dirk Duesterberg
  • Patent number: 11876468
    Abstract: A motor driving apparatus which drives a motor having a plurality of windings corresponding to a plurality of phases includes: a first inverter having a plurality of first switching elements and connected to a first end of each winding; a second inverter having a plurality of second switching elements and connected to a second end of each winding; and a controller configured to control pulse width modulation, by distributing a preset voltage command of the motor into a voltage command of the first inverter and a voltage command of the second inverter at the same rate and by generating duties of the first switching elements, wherein the controller determines the duties of the second switching elements and determines the duties of the first switching elements on and the duties of the first switching elements.
    Type: Grant
    Filed: June 15, 2022
    Date of Patent: January 16, 2024
    Assignees: HYUNDAI MOTOR COMPANY, KIA CORPORATION
    Inventors: Yong Jae Lee, Joo Young Park, Young Kwan Ko
  • Patent number: 11876464
    Abstract: Described herein is a method and system for controlling an interior-mounted permanent magnet (IPM) alternating-current (AC) electrical machine utilizing a space vector pulse-width modulated (SVPWM) converter operably connected between an electrical power source and the IPM AC electrical machine comprising three neural networks (NNs), including a controller NN operably connected to the SVPWM converter, a parameter estimator NN, and a flux-weakening and MTPA NN.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: January 16, 2024
    Assignee: The Board of Trustees of The University of Alabama
    Inventors: Shuhui Li, Michael H. Fairbank
  • Patent number: 11870380
    Abstract: The invention relates to a method (100) for operating an inverter (1) which selectively connects each of three alternating current phases (U, V, W) of an inductive load (4) to the plus pole or minus pole of a direct current (2) provided at the input (1a) of the inverter (1) by actuating switching elements (3a-3f) arranged in three half bridges (5a-5c), wherein the switch states of the switching elements (3a-3f) are modified (110) by a rotating space vector modulation. Additionally, in the event of a modulation between space vectors (6a-6f) which have the same switch element (3a, 3d; 3b, 3e; 3c, 3f) switch states with respect to at least one half bridge (5a-5c), such a half bridge (5a-5c) remains completely deactivated (120).
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: January 9, 2024
    Assignee: Robert Bosch GmbH
    Inventors: Illia Manushyn, Jochen Wessner
  • Patent number: 11863105
    Abstract: A method for controlling an electric motor, the method including determining a planned reference speed of the electric motor; determining a pulse-width modulation (PWM) switching frequency based on the planned reference speed; and controlling the electric motor with an alternating current produced by PWM switching with the determined PWM switching frequency. A control system for controlling an electric motor and an industrial robot including a control system, are also provided.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: January 2, 2024
    Assignee: ABB Schweiz AG
    Inventor: Yang Gao