Patents Examined by David Luo
  • Patent number: 11962258
    Abstract: A method for estimating the temperature of a stator coil of a magnetic suspension bearing of a rotor that is connected by connection wires to circuits for servo-controlling the position of the rotor includes the following steps: measuring the electric voltage at the terminals of the connection wires of the stator coil; measuring the intensity of the current passing through the stator coil; estimating the electric resistance of the stator coil and of the connection wires on the basis of an adaptive filter, the measured electric voltage and the intensity of the measured current; and estimating the temperature of the coil on the basis of the value of the estimated resistance.
    Type: Grant
    Filed: July 26, 2022
    Date of Patent: April 16, 2024
    Inventors: Stephane Marie Turpault, Salim Benbouzid
  • Patent number: 11962255
    Abstract: Systems and methods of controlling a length of an air gap in an electric machine using an air gap controller may include: determining an air gap length value for an electric machine at least in part using an air gap controller, comparing the determined air gap length value to an air gap target value using the air gap controller, and outputting a control command from the air gap controller to a controllable device associated with an air gap control system when the determined air gap length value differs from the air gap target value by a predefined threshold. A control command may be configured to impart a change to an operating parameter associated with the air gap control system to adjust a length of an air gap between an outer surface of a rotor core and an inner surface of a stator core of the electric machine.
    Type: Grant
    Filed: April 6, 2022
    Date of Patent: April 16, 2024
    Assignee: General Electric Company
    Inventors: Pablo Gabriel Piazza Galarza, Fabian Isaza
  • Patent number: 11958157
    Abstract: A power tool includes a housing. A motor is housed in the housing. A platen is driven by the motor. The housing includes a first housing part, a second housing part and a third housing part. The housing defines a battery receptacle portion configured to receive a removable battery pack which powers the motor. Each of the first housing part, the second housing part and the third housing part form part of the battery receptacle portion.
    Type: Grant
    Filed: September 12, 2022
    Date of Patent: April 16, 2024
    Assignee: Black & Decker Inc.
    Inventors: Drake L. Fisher, Brent A. Kuehne, Christian V. Elder
  • Patent number: 11955915
    Abstract: The present disclosure provides a variable-frequency compressor with adaptive heating power control and a method for operating the same. According to an embodiment of the present disclosure, the variable-frequency compressor includes: a compression unit, for compressing a medium entering the variable-frequency compressor; a motor, including a stator and a rotor, for driving the compression unit; and a controller, configured to adaptively control a heating power of a winding of the stator according to information of the variable-frequency compressor.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: April 9, 2024
    Assignee: DANFOSS (TIANJIN) LTD.
    Inventors: Shizhong Ji, Wanzhen Liu, Yingke Sun, Li Yao
  • Patent number: 11949341
    Abstract: A power converter including a diode converter, an inverter, a smoothing capacitor, a resistor; a current sensor; an estimation unit; and a control unit. The diode converter rectifies an alternating current from a power supply. The inverter is formed such that a DC side is connected to a DC output of the diode converter and an AC side is connected to an electric motor and includes a semiconductor switching element which converts DC power on the DC side into AC power and a reverse connection diode which is connected in antiparallel with the semiconductor switching element. The smoothing capacitor is provided in the DC output of the diode converter. The resistor is connected in parallel with the smoothing capacitor. The current sensor detects a load current flowing between the inverter and the electric motor.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: April 2, 2024
    Inventors: Masashi Fukuda, Shunsuke Tobayashi
  • Patent number: 11949297
    Abstract: A measurement circuit that is configured to provide a torque reading to a motion controller includes an offset controller and an amplifier. The offset controller is configured to read a temperature signal and to generate an offset voltage in response to receiving the temperature signal. The amplifier is configured to read a differential voltage from a differential sensor and to receive the offset voltage from the offset controller. The amplifier is also configured to add the offset voltage to the differential voltage after applying a gain to the differential voltage to generate an adjusted voltage. The amplifier is then configured to transmit the adjusted voltage.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: April 2, 2024
    Assignee: COVIDIEN LP
    Inventors: Richard S. Lech, Alok Agrawal
  • Patent number: 11949353
    Abstract: There is provided a motor control device which enables torque ripple suppressing control high in followability by executing direct voltage control. A motor control device includes a voltage command calculation unit 15 which calculates a d-axis voltage command value Vdref and a q-axis voltage command value Vqref from a d-axis current command value id* and a q-axis current command value iq* of a motor 6, a feed forward command value calculation unit 23 which calculates a qi-axis voltage feed forward command value Vqff* for generating a q-axis current ripple on the basis of spatial harmonic parameters and the frequency characteristics of a motor winding, and a subtraction unit 10 which subtracts the q-axis voltage feed forward command value Vqff* calculated by the feed forward command value calculation unit 23 from the q-axis voltage command value Vqref calculated by the voltage command calculation unit 15.
    Type: Grant
    Filed: February 19, 2021
    Date of Patent: April 2, 2024
    Inventors: Yushi Araki, Tatsuki Kashihara
  • Patent number: 11949289
    Abstract: A stator defines multiple stator poles with associated electrical windings. A rotor includes multiple rotor poles. The rotor is movable with respect to the stator and defines, together with the stator, a nominal gap between the stator poles and the rotor poles. The rotor poles includes a magnetically permeable pole material. The rotor also includes a series of frequency programmable flux channels (FPFCs). Each FPFC includes a conductive loop surrounding an associated rotor pole. The stator and the rotor are arranged such that the electrical windings in the stator induce an excitement current within at least one of the FPFCs during start-up.
    Type: Grant
    Filed: December 16, 2022
    Date of Patent: April 2, 2024
    Assignee: TAU MOTORS, INC.
    Inventors: Walter Wesley Pennington, III, Matthew J Rubin, Gregory Gordon Stevenson, Michael Parker Owen
  • 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
    Inventor: Jonathan Spitz
  • 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
    Inventor: Kai Liu
  • 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
    Inventors: Yu-Shian Lin, Tung-Chin Hsieh, Ming-Tsung Chen
  • 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: 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: 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: 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: 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: 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: 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
    Inventors: Esteban Gelso, Jonas Hellgren