Patents Examined by David Luo
  • Patent number: 11942889
    Abstract: A first torque calculation unit 114 calculates torque TQ_DC currently generated by a motor 106 based on a DC current DC1. A second torque calculation unit 115 calculates torque TQ_UVW currently generated by the motor 106 based on U-phase, V-phase, and W-phase currents. A torque limit calculation unit 116 calculates a torque limit TQ_LMT1 using a torque limit characteristic map measured in advance based on a current limit DC_LMT1. A torque limit correction unit 117 compares first torque TQ_DC with second torque TQ_UVW to calculate a torque variation degree KP1. Then, the torque limit TQ_LMT1 is corrected using the variation degree KP1 to calculate a torque limit TQ_LMT2. As a result, even if required torque reaches the torque limit, the DC current does not exceed the current limit, and the output of the motor can be fully utilized by approaching the current limit.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: March 26, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Shinyu Ko, Kohei Myoen, Eigo Kishimoto
  • Patent number: 11942885
    Abstract: A device and method for activating a conveyor device. An actual value for a pose of a device movable by the conveyor device by a magnetic force action is received. Depending on the actual value for the pose, as a function of a setpoint value for a torque, as a function of a setpoint value for a force, and as a function of a model, a setpoint value for the activation of at least one actuator of the conveyor device is determined. The model is trained to determine setpoint values for the activation of the at least one actuator as a function of actual values for poses of the device and as a function of setpoint values for torques and setpoint values for forces, using which the device is to be moved.
    Type: Grant
    Filed: November 5, 2020
    Date of Patent: March 26, 2024
    Assignee: ROBERT BOSCH GMBH
    Inventor: Jonathan Spitz
  • Patent number: 11933849
    Abstract: The present disclosure provides an inductance detection method includes steps of: (a) acquiring a stator resistance of the reluctance motor; (b) injecting a high-frequency sinusoidal signal in the d-axis or q-axis direction; (c) injecting an align signal command in the q-axis or d-axis direction; (d) receiving a dq-axes signal generated through injecting the high-frequency sinusoidal signal and the align signal command; (e) sampling a motor feedback signal generated through receiving the dq-axes signal; (f) in the direction of injecting the high-frequency sinusoidal signal, calculating an amplitude difference between the high-frequency sinusoidal signal and the motor feedback signal, and adjusting an amplitude of the high-frequency sinusoidal signal according to the amplitude difference for regulating a feedback amplitude of the motor feedback signal; and (g) when the feedback amplitude reaching an expected amplitude, calculating an apparent inductance of the reluctance motor based on the dq-axes signal, the
    Type: Grant
    Filed: May 19, 2022
    Date of Patent: March 19, 2024
    Assignee: DELTA ELECTRONICS, INC.
    Inventors: Yu-Shian Lin, Tung-Chin Hsieh, Ming-Tsung Chen
  • Patent number: 11933509
    Abstract: A compressor driving device includes a three-phase alternating current power supply input end, a relay module, a rectifier circuit, and a driving control circuit which are sequentially connected; the rectifier circuit is used for converting connected alternating current into direct current and then outputting the direct current to a direct current bus; the driving control circuit is used for converting the direct current output by the direct current bus into compressor driving power; a pressure switch is used for measuring the pressure value in a refrigerating system, and when the measured pressure value is larger than a preset pressure threshold, disconnecting the power supply circuit of the relay module; the driving control circuit is also used for detecting the on-off state of the pressure switch and controlling the compressor to stop working when the pressure switch is switched off.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: March 19, 2024
    Assignees: GD MIDEA HEATING & VENTILATING EQUIPMENT CO., LTD., MIDEA GROUP CO., LTD.
    Inventor: Kai Liu
  • Patent number: 11936315
    Abstract: A circuit for controlling a motor that includes control circuitry configured to determine whether a commutation event has occurred for a first sector of a plurality of sectors of a cycle for the motor based on a first selected phase current signal and a second selected phase current signal. In response to a determination that the commutation event has occurred for the first sector, the control circuitry is configured to determine that the motor is operating in a second sector of the plurality of sectors of the cycle for the motor. The control circuitry is further configured to determine a second angle of stator voltage vector for the motor based on the determination that the motor is operating in the second sector and generate the control signal based on the second angle of stator voltage vector for the motor.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: March 19, 2024
    Assignee: Infineon Technologies AG
    Inventors: Stanislav Gerber, Bastian Schindler, Benjamin Jahn, Sandro Purfuerst
  • Patent number: 11923833
    Abstract: For example, the switching drive device 100 includes a driver 30 configured to drive an N-type semiconductor switch element, a current limiter 50 configured to limit a current fed to a boot capacitor BC1 included in a bootstrap circuit BTC, and a current controller 60 configured to control the operation of the current limiter 50. The current controller 60 is configured to drive the current limiter 50 to limit the current fed to the boot capacitor BC1 when the charge voltage across the boot capacitor BC1 is higher than a threshold value.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: March 5, 2024
    Assignee: ROHM CO., LTD.
    Inventors: Kenji Hama, Takahiro Kotani
  • Patent number: 11923793
    Abstract: A motor-drive system may include a rectifier, a metal-oxide varistor (MOV) assembly, and an inverter. The rectifier may generate a direct current (DC) voltage based on a first voltage received from at least one supply voltage line coupled to a voltage source. The MOV assembly may include at least two metal-oxide varistors (MOVs) respectively coupled to the at least one supply voltage lines. The MOV assembly may couple between the voltage source and the rectifier. The motor-drive system may also include a permanently-installed jumper to couple at least one MOV of the at least two MOVs of the MOV assembly to a system ground. The inverter of the motor-drive system may convert the DC voltage to an alternating current (AC) voltage, which may be provided to a load of the motor-drive system.
    Type: Grant
    Filed: November 30, 2021
    Date of Patent: March 5, 2024
    Assignee: Rockwell Automation Technologies, Inc.
    Inventors: Xuechao Wang, Bora Novakovic, Rangarajan M. Tallam
  • Patent number: 11912161
    Abstract: The invention relates to a method for in-place diagnosis of a rechargeable electric vehicle battery, comprising the following steps: discharging the battery in a motor of the vehicle, using an internal resistance of the motor as a resistive load; measuring parameters of the battery during discharge to establish a state of health of the battery; estimating the temperature of the motor during discharge; and regulating the discharge current to stabilize the temperature of the motor at a constant admissible threshold.
    Type: Grant
    Filed: September 25, 2019
    Date of Patent: February 27, 2024
    Assignee: EBIKELABS
    Inventors: Maël Bosson, Raphaël Marguet, Theophile Alary
  • Patent number: 11910990
    Abstract: A cleaning system including a motor configured to provide rotational energy to an impeller, a current sensor configured to sense current provided to the moto, and a controller having an electronic processor. The controller is configured to receive, from the current sensor, a current signal indicative of the current provided to the motor, filter the current signal to produce a filtered current signal, and control the motor based on the filtered current signal.
    Type: Grant
    Filed: September 10, 2020
    Date of Patent: February 27, 2024
    Assignee: Techtronic Floor Care Technology Limited
    Inventor: Kevin Terry
  • Patent number: 11916498
    Abstract: Methods, systems, and devices for electric machine torque adjustment based on waveform integer multiples are disclosed herein. One electric machine controller arranged to direct pulsed operation of an electric machine includes utilizing a pulse controller that calculates an average torque based upon a time period that corresponds with an integer multiple of a waveform cycle of a pulse waveform.
    Type: Grant
    Filed: August 12, 2022
    Date of Patent: February 27, 2024
    Assignee: Tule eTechnology Inc.
    Inventors: Matthew Younkins, Mark Wilcutts
  • Patent number: 11909348
    Abstract: A stepping motor control device is provided, which controls a stepping motor including a rotor position detector by micro-step driving. The control device has a plurality of operation modes including an adjustment mode and a use mode. In the adjustment mode, the control device generates control data for a closed loop control for controlling the winding current of the stepping motor based on the detection value of the rotor position detector, and performs a stepping motor acceleration operation and a stepping motor deceleration operation according to the control data. In the use mode, the control device performs the stepping motor acceleration operation and the stepping motor deceleration operation so that a winding current observed in the adjustment mode is reproduced by an open loop control for controlling the winding current of the stepping motor based on the control data generated in the adjustment mode.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: February 20, 2024
    Assignee: ORIENTAL MOTOR CO., LTD.
    Inventors: Masayuki Someya, Akihiko Houda
  • Patent number: 11904724
    Abstract: The invention relates to a method (100) for estimating an operating parameter of a battery cell of a battery unit in an electrical propulsion system of a vehicle, the operating parameter being indicative of one of capacity and impedance of the battery cell, the method comprising: selecting (110) at least one battery cell in the battery unit for determining the operating parameter of the battery cell; providing (120) a set of state-of-charge (SOC) estimators, each SOC estimator having a selected operating parameter value for a given time period; and using (130) the set of SOC estimators to determine a value of the operating parameter of the battery cell by performing voltage error minimization.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: February 20, 2024
    Assignee: VOLVO TRUCK CORPORATION
    Inventors: Esteban Gelso, Jonas Hellgren
  • Patent number: 11901848
    Abstract: A rotating electric machine includes a neutral busbar and a temperature sensor. The neutral busbar has a main body and a bent part that retains the temperature sensor therein. The main body has first and second parts each of which has one or more connection terminals formed therein. The bent part is formed between a circumferential end portion of the first part and a circumferential end portion of the second part. In the first part, there is formed, between the circumferential end portion of the first part and a closest connection terminal formed in the first part to the bent part, a first extending portion that extends axially or radially. Similarly, in the second part, there is formed, between the circumferential end portion of the second part and a closest connection terminal formed in the second part to the bent part, a second extending portion that extends axially or radially.
    Type: Grant
    Filed: October 27, 2021
    Date of Patent: February 13, 2024
    Assignee: DENSO CORPORATION
    Inventors: Tomoyuki Okamura, Kensuke Hirai, Tadahiro Kurasawa
  • Patent number: 11894794
    Abstract: Systems and methods for controlling smart motors. One smart motor system includes a control bus, an input device, and a smart motor communicatively coupled to the input device via the control bus. The smart motor includes an electronic processor configured to receive, from the input device, a command frame indicating an action, perform the action, receive, from the input device, a data request frame requesting a status of the smart motor, and transmit, to the input device and in response to receiving the data request frame, a data frame indicating the status of the smart motor.
    Type: Grant
    Filed: June 30, 2022
    Date of Patent: February 6, 2024
    Assignee: LEGGETT & PLATT CANADA CO.
    Inventors: Thomas Braun, Caitlin Nicole Vicary, Milosz Niec
  • Patent number: 11891022
    Abstract: A raindrop sensor device, including a substrate, a raindrop sensor element, a first light emitting diode, and an active element, is provided. The raindrop sensor element is located on the substrate and includes a first electrode and a second electrode separated from each other. The first light emitting diode is located on the substrate and is electrically connected to the first electrode. The first electrode and the second electrode are closer to the substrate than the active element. The active element is located on the substrate and is electrically connected to the first light emitting diode.
    Type: Grant
    Filed: July 27, 2021
    Date of Patent: February 6, 2024
    Assignee: Au Optronics Corporation
    Inventors: Chia-Chi Lee, Pao-Yu Huang
  • Patent number: 11888429
    Abstract: For controlling an electric motor to maintain a current motor position, a motor controller determines the current motor position of the electric motor and selects (S41) from a set of stable positions, defined by cogging torque of the electric motor, a selected stable position closest to the current motor position. The controller controls the motor torque of the electric motor to maintain the motor position (S4) within a defined range around the selected stable position.
    Type: Grant
    Filed: September 5, 2019
    Date of Patent: January 30, 2024
    Assignee: BELIMO HOLDING AG
    Inventors: Stefan Wildhaber, Balazs Schweighoffer
  • Patent number: 11886205
    Abstract: A servo motor controller capable of eliminating inconvenience that the position of a shaft or the like of a servo motor is detected or set erroneously due to influence of noise or the like is provided. A servo motor controller that detects Z-phase signals of an incremental-type encoder that detects rotation of a servo motor to perform driving control of the servo motor includes: a position detection unit that detects a reference position of a rotating shaft of the servo motor on the basis of the Z-phase signal of the encoder; a signal interval detection unit that measures intervals of a plurality of detected Z-phase signals; and an abnormality determination unit that determines that the Z-phase signal is abnormal when the interval measured by the signal interval detection unit is equal to or larger than a prescribed threshold.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: January 30, 2024
    Assignee: FANUC CORPORATION
    Inventors: Daisuke Tajima, Yuuki Morita, Tadashi Okita
  • Patent number: 11881798
    Abstract: A motor drive control apparatus includes energization systems for energizing a motor having a plurality of independent winding sets, with the energization systems corresponding one-to-one to the winding sets. A plurality of sensors is provided for each of the energization systems. A controller is provided for each of the energization systems and controls energization of the corresponding winding set based on output signals of the corresponding sensors. A plurality of sub power supply paths is provided for their respective energization systems. Each sub power supply path connects a power supply path for supplying power to the corresponding sensors and a power supply path in another energization system. A semiconductor switch is provided for each of the sub power supply paths, and, between two different energization systems, when one of the two energization systems exhibits a sensor power supply failure, electrically connects the power supply paths of these two energization systems.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: January 23, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventor: Tomio Sakashita
  • Patent number: 11876476
    Abstract: A control system for an electrically-actuated, rideable saddle vehicle including an electric traction motor and a vehicle control system having two different speed acquisition systems. A first speed system includes a position sensor and controls power to the motor on a basis of a control signal, which is characteristic of torque selectively required by the electric motor. A second speed system includes Logic circuitry for estimating vehicle speed from estimated variations of a counter-electromotive force generated in the stator winding as a result of the rotor movement of the motor. The two systems allow optimizing control of the motor from both speed systems, or from that considered more reliable in a given operating condition, during operation of the vehicle. Illustratively, for low speeds, speed control may be based on sensor signals in the first speed system, while high speeds control may be based on the estimates from the logic system.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: January 16, 2024
    Assignee: PIAGGIO & C. S.P.A.
    Inventors: Jury Cantini, Luca Carmignani
  • Patent number: 11865924
    Abstract: A cart may include a driving wheel, a motor configured to rotate the driving wheel, a motor drive circuit configured to drive the motor, a motor brake circuit configured to electrically brake the motor, a control device configured to control the motor via the motor drive circuit and the motor brake circuit so that a travelling speed of the cart becomes equal to or lower than an upper limit travelling speed, and a temperature sensor configured to detect a temperature of the motor brake circuit. The control device may be configured to change the upper limit travelling speed to a second upper limit travelling speed lower than the first upper limit travelling speed when the upper limit travelling speed is a first upper limit travelling speed and the temperature detected by the temperature sensor exceeds a first predetermined temperature.
    Type: Grant
    Filed: June 30, 2022
    Date of Patent: January 9, 2024
    Assignee: MAKITA CORPORATION
    Inventors: Ryo Umemoto, Hirokatsu Yamamoto