Patents by Inventor Wing LIN

Wing LIN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230361697
    Abstract: A control unit for a brushless DC motor of a power tool having a rotor and a stator is provided. The control unit detects an initial position of the rotor, commutates the motor beginning at the initial position of the rotor using a low-speed motor commutation scheme until an output speed of the rotor exceeds a speed threshold, and commutates the motor based on a back-electromotive force (back-EMF) voltage of the motor after the output speed of the rotor exceeds the speed threshold. In the low-speed commutation scheme, the control unit applies a first set of voltage pulses to a present sector and a second set of voltage pulses to a next sector, and detects a transition of the rotor from the present sector to the next sector based on motor current measurements associated with the first set of voltage pulses and the second set of voltage pulses.
    Type: Application
    Filed: July 14, 2023
    Publication date: November 9, 2023
    Applicant: Black & Decker Inc.
    Inventors: Shailesh P. WAIKAR, Zhi QU, Wing LIN, John C. VANKO
  • Patent number: 11750124
    Abstract: A control unit for a brushless DC motor of a power tool having a rotor and a stator is provided. The control unit detects an initial position of the rotor, commutates the motor beginning at the initial position of the rotor using a low-speed motor commutation scheme until an output speed of the rotor exceeds a speed threshold, and commutates the motor based on a back-electromotive force (back-EMF) voltage of the motor after the output speed of the rotor exceeds the speed threshold. In the low-speed commutation scheme, the control unit applies a first set of voltage pulses to a present sector and a second set of voltage pulses to a next sector, and detects a transition of the rotor from the present sector to the next sector based on motor current measurements associated with the first set of voltage pulses and the second set of voltage pulses.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: September 5, 2023
    Assignee: Black & Decker Inc.
    Inventors: Shailesh P. Waikar, Zhi Qu, Wing Lin, John C. Vanko
  • Publication number: 20220329180
    Abstract: A control unit for a brushless DC motor of a power tool having a rotor and a stator is provided. The control unit detects an initial position of the rotor, commutates the motor beginning at the initial position of the rotor using a low-speed motor commutation scheme until an output speed of the rotor exceeds a speed threshold, and commutates the motor based on a back-electromotive force (back-EMF) voltage of the motor after the output speed of the rotor exceeds the speed threshold. In the low-speed commutation scheme, the control unit applies a first set of voltage pulses to a present sector and a second set of voltage pulses to a next sector, and detects a transition of the rotor from the present sector to the next sector based on motor current measurements associated with the first set of voltage pulses and the second set of voltage pulses.
    Type: Application
    Filed: June 22, 2022
    Publication date: October 13, 2022
    Inventors: Shailesh P. WAIKAR, Zhi QU, Wing LIN, John C. VANKO
  • Patent number: 11171586
    Abstract: A power tool is provided including a brushless motor having a stator defining a plurality of phases, a rotor rotatable relative to the stator, and power terminals electrically connected to the phases of the motor. A power unit is provided including power switches. A control unit is interfaced with the power unit to output a drive signal to one or more of the motor switches to drive the phases of the motor over a series of sectors of the rotor rotation. The control unit is configured detect incorrect rotation of the rotor by applying a first series of voltage pulses to a present sector and a second series of voltage pulses to a previous sector, measuring motor currents associated with the first and second series of voltage pulses, and comparing corresponding motor current measurements to detect a transition from the present sector to the previous sector.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: November 9, 2021
    Assignee: Black & Decker Inc.
    Inventors: Shailesh P. Waikar, Zhi Qu, Wing Lin
  • Publication number: 20200343839
    Abstract: A power tool is provided including a brushless motor having a stator defining a plurality of phases, a rotor rotatable relative to the stator, and power terminals electrically connected to the phases of the motor. A power unit is provided including power switches. A control unit is interfaced with the power unit to output a drive signal to one or more of the motor switches to drive the phases of the motor over a series of sectors of the rotor rotation. The control unit is configured detect incorrect rotation of the rotor by applying a first series of voltage pulses to a present sector and a second series of voltage pulses to a previous sector, measuring motor currents associated with the first and second series of voltage pulses, and comparing corresponding motor current measurements to detect a transition from the present sector to the previous sector.
    Type: Application
    Filed: April 20, 2020
    Publication date: October 29, 2020
    Inventors: Shailesh P. WAIKAR, Zhi QU, Wing LIN
  • Publication number: 20190021667
    Abstract: The present invention relates to an underwear-based body data monitoring method and device. The method includes: receiving position data disposed on underwear and respiration data disposed on underwear; calculating displacement, velocity and acceleration; determining whether the displacement, velocity and acceleration all exceed a preset threshold; further determining whether the respiration data is within a preset respiration range when the displacement, velocity and acceleration all exceed a preset threshold; and outputting alarm information when the respiration data is not within a preset respiration range. By the underwear-based body data monitoring method and device, body data can be collected by sensors disposed on underwear in real time. In addition, it is able to roughly determine whether the physical condition is abnormal by the displacement, velocity and acceleration, and then further determine the physical condition by respiration data.
    Type: Application
    Filed: October 19, 2017
    Publication date: January 24, 2019
    Inventor: Chi Wing LIN