Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1991-03-13
1992-12-22
Stephan, Steven L.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 97, 363131, H02M 3335
Patent
active
051738465
ABSTRACT:
A circuit for utilizing the magnetizing current in the transformer of a converter to reset the transformer's core and to provide a zero-voltage-switching condition on the converter's primary switch is disclosed. The power converter includes a transformer having a primary winding and a second winding, the secondary winding being coupled to an output load and a primary switch connected in series between the primary winding and a voltage source. The closing of the primary switch causes energy to be stored in the transformer and the opening of the primary switch causes the energy to be released from the transformer. The utilization circuit includes a series combination of a storage capacitor and a first switch coupled in parallel with one of the transformer's windings to capture the energy released from the transformer. The captured energy is used to reset the transformer's core and to create a zero voltage switching condition across the primary switch. A second switch means is connected in series with the secondary winding of the transformer and is operated to prevent the loading effects of the secondary from interrupting the creation of the zero-voltage switching condition.
REFERENCES:
patent: 4417153 (1983-11-01), Onodera et al.
patent: 4441146 (1984-04-01), Vinciarelli
patent: 4559590 (1985-12-01), Davidson
patent: 4618919 (1986-10-01), Martin
patent: 4809148 (1989-02-01), Barn
patent: 4870554 (1989-09-01), Smith
patent: 4870555 (1989-09-01), White
patent: 4959764 (1990-09-01), Bassett
patent: 4975821 (1990-12-01), Lethellier
Bruce Carsten, High Power SMPS Require Intrinsic Reliability, proceedings of the PCI, Mar. 1982, pp. 456-471.
Bruce Carsten, "Design Tricks, Techniques and Tribulations at High Conversion Frequencies", proceedings of the HPFC, Apr. 1987, pp. 139-152.
UNITRODE Integrated Circuits Corporation, datassheet for the "UC1825 High Speed PWM Controller", Linear Integrated Circuits Data and Applications Handbook, Apr. 1990, pp. 4-120 through 4-126.
Astec International Ltd.
Stephan Steven L.
Sterrett Jeffrey
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