Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1992-08-25
1995-04-18
Dougherty, Thomas M.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 89, 363 98, 363132, 323222, 323224, 315247, H02M 5458, G05F 170
Patent
active
054084032
ABSTRACT:
A power supply circuit for powering a load with bi-directional current comprises means for supplying d.c. power from an a.c. voltage, a series half-bridge converter, and a boost converter. The series half-bridge converter alternately impresses a d.c. bus voltage from a bus conductor across a load circuit first with one polarity and then with the opposite polarity. The series half-bridge converter includes a first switch interposed between the bus conductor and a bridge-switch end of the load circuit; a second switch interposed between ground and the bridge-switch end of the load circuit; and a switching control circuit for alternately switching on the first and second switches. The boost converter comprises a boost capacitor connected between the bus conductor and ground and whose level of charge determines the bus voltage on the bus conductor; a boost inductor for storing energy from the means for supplying d.c. power, the boost inductor being connected by a one-way valve to the boost capacitor for discharging its energy into the boost capacitor; and means for periodically connecting a load end of the boost inductor through a low impedance path to ground, such path including a boost switch. A condensed power supply circuit results from making the second switch of the series half-bridge converter additionally serve as the boost switch. An alternative circuit simplification results from making constant the ratio of on time to switching repetition period of the boost switch.
REFERENCES:
patent: 4264949 (1981-04-01), Simmons et al.
patent: 4533986 (1985-08-01), Jones
patent: 4985819 (1991-01-01), Mori et al.
patent: 5019952 (1991-05-01), Smolenski et al.
patent: 5072355 (1991-12-01), Huillet
patent: 5082998 (1992-01-01), Yoshioka
patent: 5181159 (1993-01-01), Peterson et al.
patent: 5251119 (1993-10-01), Maehara
patent: 5303140 (1994-04-01), Shimizu
patent: 5359274 (1994-10-01), Bandel
Kachmarik David J.
Nerone Louis R.
Berhane Adolf
Corwin Stanley C.
Dougherty Thomas M.
General Electric Company
Hawranko George E.
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