Self-oscillating DC-DC Converter with zero voltage switching

Details Self-oscillating DC-DC Converter with zero voltage switching Self-oscillating DC-DC Converter with zero voltage switching

1993-10-15

1995-05-02

Stephan, Steven L.

Electric power conversion systems

Current conversion

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

363 19, H02M 3335

Patent

active

054125553

ABSTRACT:
The present invention is an ON/OFF type self-oscillating DC--DC converter with zero voltage switching and is provided with a transformer, a switching element on the primary side and a diode on the secondary side of the transformer, and configured so that the current (signal) flowing in the secondary side is detected by a resistor. The detected current is delayed by a comparator and provided with a short circuit which shorts the diode driven by the delayed signal. The present invention uses this arrangement to perform a switching operation at zero volts so that there is no switching loss, to improve the conversion efficiency and to have stable transmission operation even for non-load operation.

REFERENCES:
patent: 4933830 (1990-06-01), Sato et al.
patent: 5175675 (1992-12-01), Uramoto

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