Patents by Inventor Yishan Ma

Yishan Ma 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).

  • BLDC motor system with reduced power loss and the initial rotation direction judging method thereof
    Patent number: 12362692
    Abstract: A BLDC motor system having a power stage, a hall sensor and a logical control circuit is discussed. The BLDC motor system improves performances by judging an initial rotation direction through the back electromotive force generated by the stator together with the induced signal sensed by the hall sensor.
    Type: Grant
    Filed: April 3, 2023
    Date of Patent: July 15, 2025
    Assignee: Chengdu Monolithic Power Systems Co., Ltd.
    Inventors: Hongqiang Qin, Yishan Ma, Qiming Zhao, Licheng Sheng
  • BLDC MOTOR SYSTEM WITH REDUCED POWER LOSS AND THE INITIAL ROTATION DIRECTION JUDGING METHOD THEREOF
    Publication number: 20230318495
    Abstract: A BLDC motor system having a power stage, a hall sensor and a logical control circuit is discussed. The BLDC motor system improves performances by judging an initial rotation direction through the back electromotive force generated by the stator together with the induced signal sensed by the hall sensor.
    Type: Application
    Filed: April 3, 2023
    Publication date: October 5, 2023
    Inventors: Hongqiang Qin, Yishan Ma, Qiming Zhao, Licheng Sheng