Patents by Inventor Stephen W. Raiser

Stephen W. Raiser 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).

  • DC/DC converter for a fuel cell providing both a primary and auxiliary output voltage
    Patent number: 6177736
    Abstract: A DC/DC converter for a fuel cell includes an input node for receiving DC supply power from the fuel cell and an output node for providing a first DC output voltage. A first inductor includes a first winding having a first terminal and a second terminal, with the first terminal coupled with the input node for receiving DC supply power from the fuel cell. A switch is coupled between the second terminal of the first winding and ground. A control circuit switches the switch between an open position and a closed position. A first capacitor is coupled between the output node and ground. A first diode is coupled between the second terminal of the first winding and the output node for preventing current from flowing from the first capacitor to the second terminal of the first winding. A second winding is disposed in a transformer relationship with the first winding for producing a second output voltage. An AC/DC circuit rectifies AC voltage from the second winding and provides a constant second DC output voltage.
    Type: Grant
    Filed: November 12, 1999
    Date of Patent: January 23, 2001
    Assignee: General Motors Corporation
    Inventor: Stephen W. Raiser