Switching DC-to-DC converters

Details Switching DC-to-DC converters Switching DC-to-DC converters

1982-09-02

1987-02-03

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 45, 363 61, H02M 3335

Patent

active

046412298

ABSTRACT:
The input direct current used to build up the electromagnetic field surrounding the windings of a flyback transformer is converted by direct transformer action to current for replenishing charge in a first capacitor. Flyback current from the flyback transformer is used to replenish charge in a second capacitor. The sum of the voltages across the capacitors is supplied as converted energy to a load. In accordance with the invention, ripple in this output voltage is suppressed by proportioning the capacitances of the first and second capacitors to equal a nominal value of the ratio of the durations of the time intervals where direct transformer action obtains to the durations of the flyback intervals.

REFERENCES:
patent: 3740639 (1973-06-01), Easter
patent: 3753075 (1973-08-01), Tomura et al.
patent: 3935526 (1976-01-01), Kamata et al.
patent: 4030024 (1977-06-01), Chambers
patent: 4122514 (1978-10-01), Amin
patent: 4186436 (1980-01-01), Ishiwatari
patent: 4253137 (1981-02-01), Rao
Electronic Engineering, vol. 51, No. 625, p. 18, (Jul. 1979).

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