Single phase and three phase AC to DC converters

Details Single phase and three phase AC to DC converters Single phase and three phase AC to DC converters

1981-05-20

1983-05-31

Pellinen, A. D.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 41, 363 67, 363 71, H02M 112, H02M 723

Patent

active

043863949

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.

REFERENCES:
patent: 3728609 (1973-04-01), Kelley
patent: 3825814 (1974-07-01), Pelly
patent: 3883792 (1975-05-01), Ellert
Thomas, "AC to DC Converter", IBM Technical Disclosure Bulletin, vol. 6, No. 3, Aug. 1963, p. 45.

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