High power switching power supply

Details High power switching power supply High power switching power supply

1989-04-17

1990-08-07

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 97, 363 37, H02M 3335

Patent

active

049473085

ABSTRACT:
The switching power supply has a high output power and high efficiency. This is accomplished by successively applying voltages of opposite polarities across primary of a power transformer, wherein only two transistors are used. The input voltage may be AC or DC. The switching power supply comprises a capacitor coupled to ground for storing a DC voltage having an opposite polarity to the input voltage. A pair of switches successively applies the input voltage and DC voltage to a node. A transformer has a first winding coupled to the node and ground, a second winding coupled to ground for providing a charging signal and a third winding for providing the output signal. A diode applies the charging signal to the capacitor.

REFERENCES:
patent: 4184197 (1980-01-01), Cuk et al.
patent: 4353112 (1982-10-01), Rietveld et al.
patent: 4535399 (1985-08-01), Szepesi
patent: 4736151 (1988-04-01), Dishner

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