Single-stage, unity power factor switching converter with voltag

Details Single-stage, unity power factor switching converter with voltag Single-stage, unity power factor switching converter with voltag

1996-01-16

1997-06-24

Wong, Peter S.

Electric power conversion systems

Current conversion

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

323224, 323286, H02M 3335, G05F 1613, G05F 316, G05F 144

Patent

active

056422679

ABSTRACT:
Ac-to-dc switching converters employ bidirectional voltage switches, preferably magnetic amplifiers in series with a fast recovery diode, as controllable series input switches that couple ac rectifiers to single-stage dc-to-dc converters in order to provide unity power factor operation by control of current through the input inductor achieved by modulating the duty ratio d1 of the bidirectional voltage switch while independent regulation of load voltage is maintained by voltage feedback to modulate the switch duty ratio d of the converter (where d1<d) in an independent fast output regulation loop.

REFERENCES:
patent: 4184197 (1980-01-01), Cuk et al.
patent: 4257087 (1981-03-01), Cuk
patent: 5442539 (1995-08-01), Cuk et al.
Brkovic, M. and Cuk, S., "Automatic Current Shaper With Fast Output Regulation and Soft-Switching," IEEE International Telecommunication Energy Conference Proc., pp. 379-386, (1993).
Jovanovic, M.M., Tsang, Dan M.C., and Lee, F.C., "Reduction of Voltage Stress in Integrated High-Quality Rectifier-Regulators by Variable-Frequency Control," IEEE App. Power Electronics Conf. Proc., pp. 569-575 (1994).
Tedder, Robert M., "Limitations of the Magamp Regulator and an Improved Magamp Choke Design Procedure," IEEE App. Power Electronics Conf. Proc., pp. 109-117, (1988).
Dixon, L.H., Jr., "High Power Factor Preregulators for Off-Line Power Supplies," Unitrode Power Supply Design Seminar SEM-800, pp. 12.1-16.
Madigan, M., Erickson, R. and Ismail, E. "Integrated High Quality Rectifier-Regulators," IEEE Power Electronics Specialists Conference Proc., pp. 1043-1050, (1992).

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