Robert D Steigerwald

US Patent:

43863949, May 31, 1983

Filed:

May 20, 1981

Appl. No.:

6/264750

Inventors:

Mark J. Kocher - Scotch Plains NJ
Robert L. Steigerwald - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02M 112
H02M 723

US Classification:

363 20

Abstract:

A single phase AC to DC power converter is provided which accepts a single AC line input voltage and provides a DC output voltage. Input current feedback is used to control the converter and to provide high quality sinusoidal line currents in phase with the applied line voltage. In another embodiment, a three phase AC to DC converter is realized as a delta connection of three isolated single phase AC to DC converters. Reduction in peak transistor currents of the switching transistor in each single phase converter is accomplished by the introduction of third harmonics to each of the single phase AC to DC power converters. Each of the three single phase AC to DC converters are synchronized so that the current pulses at the outputs of the three AC to DC converters are staggered in time reducing the amount of filtering required at the load.