Patents by Inventor James C. R. Smart

James C. R. Smart 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).

  • Digital power factor correction circuit
    Patent number: 5801935
    Abstract: A digital power factor correction circuit including a digital comparator that compares the actual DC bus voltage of an electric circuit with a desired DC bus voltage to produce a digital attenuation signal in the form of a pulse width modulated signal that is used to attenuate the voltage from a time-varying source. The attenuated source voltage is used as the current demand signal for a current controller that controls the current drawn from the line.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: September 1, 1998
    Assignees: Emerson Electric Co., Switched Reluctance Drives, Ltd.
    Inventors: David M. Sugden, Phillip G. Langhorst, Joseph G. Marcinkiewicz, James C. R. Smart