Patents by Inventor Shudu Liu

Shudu Liu 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).

  • Hardware overvoltage disconnecting circuit
    Patent number: 8547674
    Abstract: A hardware overvoltage disconnecting circuit wherein a DC power supply module is disconnected from a power network when the AC power network is in the state of overvoltage. The circuit includes a disconnecting relay and a voltage detection circuit. The disconnecting relay is connected in series between an AC power network and a power factor correction circuit of a power supply module. A first sampling terminal of the voltage detection circuit samples the voltage of the AC power network between the AC power network and the disconnecting relay, and an output of the voltage detection circuit is connected to a control terminal of the disconnecting relay. When the AC power network is in the state of overvoltage, the disconnecting relay is disconnected and the power supply module is disconnected from the AC power network. When the voltage of the AC power network is normal, the disconnecting relay is connected.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: October 1, 2013
    Assignee: Emerson Network Power, Energy Systems, North America
    Inventors: Chunhui Zhu, Jingjing Huang, Shudu Liu
  • Hardware Overvoltage Disconnecting Circuit
    Publication number: 20120140368
    Abstract: A hardware overvoltage disconnecting circuit wherein a DC power supply module is disconnected from a power network when the AC power network is in the state of overvoltage. The circuit includes a disconnecting relay and a voltage detection circuit. The disconnecting relay is connected in series between an AC power network and a power factor correction circuit of a power supply module. A first sampling terminal of the voltage detection circuit samples the voltage of the AC power network between the AC power network and the disconnecting relay, and an output of the voltage detection circuit is connected to a control terminal of the disconnecting relay. When the AC power network is in the state of overvoltage, the disconnecting relay is disconnected and the power supply module is disconnected from the AC power network. When the voltage of the AC power network is normal, the disconnecting relay is connected.
    Type: Application
    Filed: December 13, 2011
    Publication date: June 7, 2012
    Applicant: Emerson Network Power Energy Systems, North America, Inc.
    Inventors: Chunhui Zhu, Jingjing Huang, Shudu Liu
  • Hardware overvoltage disconnecting circuit
    Patent number: 8098468
    Abstract: The invention relates to a voltage detection control technology, especially relate to a hardware overvoltage disconnecting circuit wherein a DC power supply module is disconnected from a power network when the AC power network is in the state of overvoltage. The hardware overvoltage disconnecting circuit comprises a disconnecting relay and a voltage detection circuit. The disconnecting relay is connected in series between an AC power network and a power factor correction circuit of a power supply module. A first sampling terminal of the voltage detection circuit samples the voltage of the AC power network between the AC power network and the disconnecting relay, and an output of the voltage detection circuit is connected to a control terminal of the disconnecting relay. When the AC power network is in the state of overvoltage, the disconnecting relay is disconnected and the power supply module is disconnected from the AC power network.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: January 17, 2012
    Assignee: Emerson Network Power, Energy Systems, North America, Inc.
    Inventors: Chunhui Zhu, Jingjing Huang, Shudu Liu
  • HARDWARE OVERVOLTAGE DISCONNECTING CIRCUIT
    Publication number: 20090174977
    Abstract: The invention relates to a voltage detection control technology, especially relate to a hardware overvoltage disconnecting circuit wherein a DC power supply module is disconnected from a power network when the AC power network is in the state of overvoltage. The hardware overvoltage disconnecting circuit comprises a disconnecting relay and a voltage detection circuit. The disconnecting relay is connected in series between an AC power network and a power factor correction circuit of a power supply module. A first sampling terminal of the voltage detection circuit samples the voltage of the AC power network between the AC power network and the disconnecting relay, and an output of the voltage detection circuit is connected to a control terminal of the disconnecting relay. When the AC power network is in the state of overvoltage, the disconnecting relay is disconnected and the power supply module is disconnected from the AC power network.
    Type: Application
    Filed: February 13, 2007
    Publication date: July 9, 2009
    Applicant: Emerson Network Power Energy Systems, North America, Inc.
    Inventors: Chunhui Zhu, Jingjing Huang, Shudu Liu