DC-DC converter with transformer having a single secondary windi

Details DC-DC converter with transformer having a single secondary windi DC-DC converter with transformer having a single secondary windi

1991-05-07

1992-12-15

Sterrett, Jeffrey

Electric power conversion systems

Current conversion

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

363 17, 363 48, 363126, H02M 3335

Patent

active

051723085

ABSTRACT:
In a DC-DC converter, the primary circuit has a bridged switching circuit which applies an input CD voltage to the primary winding of a transformer in response to turn-on pulses to generate alternating current pulses through the primary winding and an anti-biasing capacitor. First and second diodes are coupled respectively to opposite ends of the secondary of the transformer to allow energy stored therein to be discharged into a smoothing capacitor through a first smoothing inductor. Third and fourth diodes are coupled respectively to the opposite ends of the secondary winding to allow energy subsequently stored therein to be discharged into the smoothing capacitor through a second smoothing inductor. The arrangement of the diodes are such that the first and third diodes form a circuit that discharges energy from the first smoothing inductor into the smoothing capacitor, and the second and fourth diodes form a circuit that discharges energy from the second smoothing inductor into the smoothing capacitor, and the second and third diodes form a low-impedance circuit across the secondary winding when the switching circuit is turned off to reserve energy in the secondary winding.

REFERENCES:
patent: 4031452 (1977-06-01), Longa et al.
patent: 4471423 (1984-09-01), Hase
patent: 4555751 (1985-11-01), Koga et al.
patent: 4897522 (1990-01-01), Bilczo et al.
patent: 4945462 (1991-07-01), Lieberman
patent: 4977493 (1990-12-01), Smith

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