Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1989-02-22
1990-09-25
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 24, 363131, 363134, H02M 3335
Patent
active
049597655
ABSTRACT:
A quasi-resonant DC to DC converter having zero-current and zero-voltage switching includes a transformer with primary and secondary windings, and periodic switching means connected in series with the primary winding. The converter further includes an input capacitor parallel to the transformer's primary winding and an output capacitor parallel to the secondary winding. The topology of the converter is determined by selecting an input capacitor having a capacitance much lower than the output capacitor, by selecting the resonance period of a circuit including the input capacitor and the overall series inductance of the transformer to be shorter than the ON period of the periodic switching means, and by selecting the resonance period of a circuit including the overall parasitic capacitance, referred to the primary side of the transformer and the periodic switching means, and the magnetizing inductance of the transformer to be shorter than the OFF period of the periodic switching means.
REFERENCES:
patent: 4415959 (1983-11-01), Vinciarelli
patent: 4675797 (1987-06-01), Vinciarelli
patent: 4720667 (1988-01-01), Lee et al.
patent: 4785387 (1988-11-01), Lee et al.
patent: 4788634 (1988-11-01), Schlecht et al.
patent: 4823249 (1989-04-01), Garcia
patent: 4841220 (1989-06-01), Tabisz
IEEE Transactions on Aerospace and Electronic Systems, vol. AES-16, No. 5, Sep. 1980, pp. 615-619, Kurt K. Hedel, "High-Density Avionic Power Supply".
Agence Spatiale Europeenne
Beha Jr. William H.
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