Daniel D Retotar

US Patent:

45919631, May 27, 1986

Filed:

Apr 23, 1984

Appl. No.:

6/602695

Inventors:

Daniel D. Retotar - Randolph NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H02M 3335

US Classification:

363 17

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.