Patents by Inventor Kristy M. Grant

Kristy M. Grant 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).

  • System and method for providing a high efficiency bypass circuit for multi-stage DC-DC converters used in battery powered systems
    Patent number: 8971073
    Abstract: A system and method are disclosed for providing a high efficiency bypass circuit for multi-stage direct current to direct current (DC-DC) converters used in battery powered systems. When the system is operating in a battery mode, the vehicle power source is unplugged from the power supply input connector and the external battery is connected in its place. The system uses a relay to bypass the flyback converter so as to connect the boost converter output directly to the output terminals. The system uses a single control signal to: 1) energize the relay connecting the boost converter output directly to the output terminals, 2) adjust the boost converter circuit to cause the boost converter to deliver a voltage equal to what the flyback converter would have delivered, and 3) disable the flyback converter.
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: March 3, 2015
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Kristy M. Grant, James W. Blair, Reba Cox