Patents by Inventor Palanivel Selvaraju

Palanivel Selvaraju 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).

  • Reverse current protection for power converters having synchronous rectifiers
    Patent number: 8233293
    Abstract: A power supply includes an input, an output, a reverse current protection circuit, a synchronous rectifier and an output choke. The reverse current protection circuit is configured for detecting a flyback voltage indicative of reverse current, and for deactivating the synchronous rectifier in response to detecting the flyback voltage. The flyback voltage can be detected a variety of ways, including across the output choke, across a switch in the synchronous rectifier, across the secondary winding of a power transformer, etc.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: July 31, 2012
    Assignee: Astec International Limited
    Inventors: Palanivel Selvaraju, Ronnie A. Bagalay
  • Power converters having balanced power rail currents
    Patent number: 7586769
    Abstract: A power factor correction (PFC) circuit includes a coupled split boost choke having at least two windings, at least two boost diodes and at least two power rails. Each power rail includes one of the windings and one of the boost diodes. The PFC circuit further includes a current balancing circuit coupled between the power rails for substantially balancing currents in such power rails.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: September 8, 2009
    Assignee: Astec International Limited
    Inventors: Khanderao Madav Gaikwad, Palanivel Selvaraju, Wilson Palaypayon
  • Reverse current protection for power converters having synchronous rectifiers
    Publication number: 20070165429
    Abstract: A power supply includes an input, an output, a reverse current protection circuit, a synchronous rectifier and an output choke. The reverse current protection circuit is configured for detecting a flyback voltage indicative of reverse current, and for deactivating the synchronous rectifier in response to detecting the flyback voltage. The flyback voltage can be detected a variety of ways, including across the output choke, across a switch in the synchronous rectifier, across the secondary winding of a power transformer, etc.
    Type: Application
    Filed: January 18, 2007
    Publication date: July 19, 2007
    Inventors: Palanivel Selvaraju, Ronnie A. Bagalay