Patents by Inventor Zhengyun Ran

Zhengyun Ran 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).

  • Uninterrupted magnetic bearing power control for power failure and recovery
    Patent number: 12282370
    Abstract: A power control system includes a current sensor and a control unit. The current sensor is coupled to a permanent magnet synchronous motor (PMSM) and is configured to monitor a current profile of the PMSM. The control unit is coupled to the PMSM and a magnetic bearing system. The control unit receives signals associated with the current profile of the PMSM and controls power provided by a main power supply to the PMSM in a first operating mode. In response to detecting a power failure of the main power supply, the control unit determines an estimated rotation speed of the PMSM according to the current profile of the PMSM and generates a first output voltage to power the magnetic bearing system in a second operating mode different from the first operating mode. A value of the first output voltage is generated based on the estimated rotation speed of the PMSM.
    Type: Grant
    Filed: April 12, 2022
    Date of Patent: April 22, 2025
    Assignee: MIDEA GROUP CO., LTD.
    Inventors: Huaiyu Lin, Zhongfan Zhao, Zhengyun Ran, Fei Qiao