Patents by Inventor Po-Chueh Wang

Po-Chueh Wang 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).

  • Flyback converter for performing a zero voltage switch in boundary mode
    Patent number: 6950318
    Abstract: The present invention is to provide a flyback converter by utilizing harmonic effect generated by a transformer thereof, after transferring electric energy in the transformer in a boundary mode, through cooperating with a simple control circuit to draw the charges stored in a main switch thereof out and enable the main switch to perform a zero voltage switch under a variety of loads in the boundary mode, which not only greatly reduces switch loss thereof, but also effectively limits an operating frequency of the main switch in a predetermined range to greatly decrease peak value of voltage caused by inductance leakage and have the advantages of high efficiency, high switching frequency and low noise without increasing the manufacturing cost.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: September 27, 2005
    Assignee: Skynet Electronic Co., Ltd.
    Inventors: Jim H. Liang, Kuo-Chien Huang, Kun-Shan Pai, Po-Chueh Wang
  • FLYBACK CONVERTER FOR PERFORMING A ZERO VOLATAGE SWITCH IN BOUNDARY MODE
    Publication number: 20050185425
    Abstract: The present invention is to provide a flyback converter by utilizing harmonic effect generated by a transformer thereof, after transferring electric energy in the transformer in a boundary mode, through cooperating with a simple control circuit to draw the charges stored in a main switch thereof out and enable the main switch to perform a zero voltage switch under a variety of loads in the boundary mode, which not only greatly reduces switch loss thereof, but also effectively limits an operating frequency of the main switch in a predetermined range to greatly decrease peak value of voltage caused by inductance leakage and have the advantages of high efficiency, high switching frequency and low noise without increasing the manufacturing cost.
    Type: Application
    Filed: April 15, 2004
    Publication date: August 25, 2005
    Applicant: SKYNET ELECTRONIC CO., LTD.
    Inventors: Jim Liang, Kuo-Chien Huang, Kun-Shan Pai, Po-Chueh Wang