Patents by Inventor Yawen Shi

Yawen Shi 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).

  • Controller and control method for alternating current contactor
    Patent number: 10256063
    Abstract: A controller for an alternating current contactor includes: a filtering and rectification circuit that filters and rectifies external alternating current; an electromagnet component driven by an output of the filtering and rectification circuit that performs actions of attraction, holding or releasing; a power transistor circuit connected to the electromagnet component; and a microcontroller that controls the power transistor circuit to control the actions performed by the electromagnet component. The controller further includes a voltage control loop that provides a voltage feedback signal and a current control loop that provides a current feedback signal to the microcontroller. The microcontroller generates a control signal according to the voltage feedback signal.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: April 9, 2019
    Assignees: SEARI ELECTRIC TECHNOLOGY CO., LTD., ZHEJIANG CHINT ELECTRICS CO., LTD.
    Inventors: Fei Yu, Changxun Gu, Shunfeng Ge, Di Zhang, Yugang Feng, Yawen Shi, Ping Zeng
  • CONTROLLER AND CONTROL METHOD FOR ALTERNATING CURRENT CONTACTOR
    Publication number: 20170213677
    Abstract: A controller for an alternating current contactor includes: a filtering and rectification circuit that filters and rectifies external alternating current; an electromagnet component driven by an output of the filtering and rectification circuit that performs actions of attraction, holding or releasing; a power transistor circuit connected to the electromagnet component; and a microcontroller that controls the power transistor circuit to control the actions performed by the electromagnet component. The controller further includes a voltage control loop that provides a voltage feedback signal and a current control loop that provides a current feedback signal to the microcontroller. The microcontroller generates a control signal according to the voltage feedback signal.
    Type: Application
    Filed: July 23, 2015
    Publication date: July 27, 2017
    Applicants: SEARI ELECTRIC TECHNOLOGY CO., LTD., ZHEJIANG CHINT ELECTRICS CO., LTD.
    Inventors: Fei Yu, Changxun Gu, Shunfeng Ge, Di Zhang, Yugang Feng, Yawen Shi, Ping Zeng