Patents by Inventor Sin Sang WONG

Sin Sang WONG 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).

  • Control circuit for a DC motor
    Patent number: 9385640
    Abstract: A control circuit for a DC motor, has: a first and second input ports for connection to a DC source; a H-bridge driving circuit, having first and second switches connected in series between the input ports, and third and fourth switches connected in series between the input ports, a first output port between the first and second switches and a second output port between the third and fourth switches, and a shunt circuit and/or a blocking circuit. The motor is connected between the first and second output ports. The shunt circuit is connected between the first second output ports and has a resistance that will decrease in response to BEMF generated by the motor. The blocking circuit is connected in series with the motor between the output ports and has a resistance that increases in response to BEMF generated by the motor.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: July 5, 2016
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: Chi Ping Sun, Fei Xin, Xiu Wen Yang, Shing Hin Yeung, Yun Long Jiang, Yan Yun Cui, Sin Sang Wong, Zhu Qing Yi
  • CONTROL CIRCUIT FOR A DC MOTOR
    Publication number: 20150145450
    Abstract: A control circuit for a DC motor, has: a first and second input ports for connection to a DC source; a H-bridge driving circuit, having first and second switches connected in series between the input ports, and third and fourth switches connected in series between the input ports, a first output port between the first and second switches and a second output port between the third and fourth switches, and a shunt circuit and/or a blocking circuit. The motor is connected between the first and second output ports. The shunt circuit is connected between the first second output ports and has a resistance that will decrease in response to BEMF generated by the motor. The blocking circuit is connected in series with the motor between the output ports and has a resistance that increases in response to BEMF generated by the motor.
    Type: Application
    Filed: November 26, 2014
    Publication date: May 28, 2015
    Inventors: Chi Ping SUN, Fei XIN, Xiu Wen YANG, Shing Hin YEUNG, Yun Long JIANG, Yan Yun CUI, Sin Sang WONG, Zhu Qing YI