Patents by Inventor Daniel D. Retotar

Daniel D. Retotar 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).

  • Technique for reducing line current harmonics at input to power supply acting as nonlinear load
    Patent number: 4591963
    Abstract: Harmonic currents of the line frequency on the input line of a power converter are significantly reduced by actively controlling the input current to have substantially the same waveform and be in phase with the input AC sinusoidal voltage. Specific peak current control techniques are utilized to constrain current in an input inductor to be in phase with and approximate in waveform the input voltage sinusoidal waveform by operating a switch at a much higher frequency than that of the input AC voltage source; with the peak current control using the input AC voltage as a controlling reference voltage waveform.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: May 27, 1986
    Assignee: AT&T Bell Laboratories
    Inventor: Daniel D. Retotar