Patents by Inventor Chaur-Ping CHENG

Chaur-Ping CHENG 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).

  • Three-phase power supply with three-phase three-level DC/DC converter
    Patent number: 8411473
    Abstract: A three-phase power supply with a three-phase three-level DC/DC converter includes a full-bridge thyristor converter with three-set four in-series power switch elements, a three-phase isolated transformer, a full-bridge rectifier, a rectifying circuit, and a low-pass filtering circuit. The three-phase power supply is used to deliver power energy from the AC input voltage to the load. The power switch elements, which separated to each other at 120-degree phase differences, are controlled through a phase shift scheme. Therefore, the three-level circuit structure is provided to reduce withstanding voltage of the power switch elements, further the zero-voltage switching (ZVS) is achieved by the isolated transformer and the power switch elements to increase the efficiency of the DC/DC converter.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: April 2, 2013
    Assignee: Allis Electric Co., Ltd.
    Inventors: Chaur-Ping Cheng, Chih-Hsing Fang, Wen-Wei Chan, Po-Yuan Chen
  • THREE-PHASE POWER SUPPLY WITH THREE-PHASE THREE-LEVEL DC/DC CONVERTER
    Publication number: 20120155124
    Abstract: A three-phase power supply with a three-phase three-level DC/DC converter includes a full-bridge thyristor converter with three-set four in-series power switch elements, a three-phase isolated transformer, a full-bridge rectifier, a rectifying circuit, and a low-pass filtering circuit. The three-phase power supply is used to deliver power energy from the AC input voltage to the load. The power switch elements, which separated to each other at 120-degree phase differences, are controlled through a phase shift scheme. Therefore, the three-level circuit structure is provided to reduce withstanding voltage of the power switch elements, further the zero-voltage switching (ZVS) is achieved by the isolated transformer and the power switch elements to increase the efficiency of the DC/DC converter.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Inventors: Chaur-Ping CHENG, Chih-Hsing Fang, Wen-Wei Chan, Po-Yuan Chen