Patents by Inventor Ming Li Zhang

Ming Li Zhang 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).

  • Patent number: 9614431
    Abstract: A control circuit includes: an input terminal for receiving an input AC voltage; a voltage decreasing unit for decreasing the input AC voltage; an A-D converter for converting the decreasing AC voltage to a DC voltage; a driving unit for receiving the DC voltage and to driving a motor, a detecting unit for detecting the DC voltage; and a current shunt unit configured to be conductive to lower the DC voltage at the output terminal of the A-D converter to a voltage which is less than a threshold voltage when the detecting signal indicates that the detected DC voltage exceeds the threshold value. A motor device includes the control circuit and a motor.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: April 4, 2017
    Assignee: Johnson Electric S.A.
    Inventors: En Hui Wang, Fei Xin, Chi Ping Sun, Ming Li Zhang
  • Publication number: 20160006342
    Abstract: A control circuit includes: an input terminal for receiving an input AC voltage; a voltage decreasing unit for decreasing the input AC voltage; an A-D converter for converting the decreasing AC voltage to a DC voltage; a driving unit for receiving the DC voltage and to driving a motor, a detecting unit for detecting the DC voltage; and a current shunt unit configured to be conductive to lower the DC voltage at the output terminal of the A-D converter to a voltage which is less than a threshold voltage when the detecting signal indicates that the detected DC voltage exceeds the threshold value. A motor device includes the control circuit and a motor.
    Type: Application
    Filed: September 17, 2015
    Publication date: January 7, 2016
    Inventors: En Hui WANG, Fei XIN, Chi Ping SUN, Ming Li ZHANG
  • Patent number: 9166444
    Abstract: A control circuit has an input terminal for receiving an input voltage, an energy accumulator for storing electric energy from the input terminal and supplying power to an electrical load, and an over-voltage protection unit for lowering the voltage at the input terminal when the voltage at an output terminal of the energy accumulator exceeds a predetermined threshold value. A motor device combines the control circuit with an electric motor as the load.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: October 20, 2015
    Assignee: JOHNSON ELECTRIC S.A.
    Inventors: En Hui Wang, Fei Xin, Chi Ping Sun, Ming Li Zhang
  • Patent number: 8754606
    Abstract: A power supply circuit has an input terminal for electrically connecting to an active wire of an AC power supply, an earth terminal for electrically connecting to a neutral or ground wire of the AC power supply, and a voltage decreasing unit. The voltage decreasing unit has an adjustable capacitor unit with adjustable capacitance for decreasing an AC voltage applied to the input terminal and an output terminal for outputting the decreased AC voltage. An electric motor is combined with the power supply circuit to form a motor device.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: June 17, 2014
    Assignee: Johnson Electric S.A.
    Inventors: Fei Xin, En Hui Wang, Chi Ping Sun, Ming Li Zhang, Shing Hin Yeung
  • Publication number: 20110234128
    Abstract: A power supply circuit has an input terminal for electrically connecting to an active wire of an AC power supply, an earth terminal for electrically connecting to a neutral or ground wire of the AC power supply, and a voltage decreasing unit. The voltage decreasing unit has an adjustable capacitor unit with adjustable capacitance for decreasing an AC voltage applied to the input terminal and an output terminal for outputting the decreased AC voltage. An electric motor is combined with the power supply circuit to form a motor device.
    Type: Application
    Filed: March 25, 2011
    Publication date: September 29, 2011
    Inventors: Fei XIN, En Hui Wang, Chi Ping Sun, Ming Li Zhang, Shing Hin Yeung
  • Publication number: 20110235218
    Abstract: A control circuit has an input terminal for receiving an input voltage, an energy accumulator for storing electric energy from the input terminal and supplying power to an electrical load, and an over-voltage protection unit for lowering the voltage at the input terminal when the voltage at an output terminal of the energy accumulator exceeds a predetermined threshold value. A motor device combines the control circuit with an electric motor as the load.
    Type: Application
    Filed: March 25, 2011
    Publication date: September 29, 2011
    Inventors: EN HUI WANG, FEI XIN, CHI PING SUN, MING LI ZHANG