Switch mode power supply with separately regulated secondary vol

Details Switch mode power supply with separately regulated secondary vol Switch mode power supply with separately regulated secondary vol

1988-09-19

1990-03-27

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

323235, 363 67, H02M 3335

Patent

active

049126172

ABSTRACT:
A primary winding of a transformer is coupled to a source of input voltage and to a controllable switch. The switch is responsive to a first control signal for generating output pulses in the transformer secondary windings. A supply circuit is responsive to the output pusles and generates a first supply voltage. A capacitor charging circuit includes a thyristor that is coupled to one of the transformer secondary windings. The thyristor receives the output pulses for providing charging pulses to the capacitor for generating a second supply voltage. A control circuit is coupled to the thyristor for varying the number of output pulses occurring relative to a given number of charging pulses to regulate the second supply voltage.

REFERENCES:
patent: 3491283 (1970-01-01), Johnston
patent: 4313061 (1982-01-01), Thomas
Mattson et al., "High-Frequency Power Supply", IBM Tech. Discl. Bul., vol. 15, No. 10, pp. 3175, 3176, Mar. 1973.
IBM Tech. Disclosure Bul., vol. 15, No. 1, Jun. 1972, pp. 70-71.
57-193820A, Patent Abstracts of Japan, Band 7, No. 42, Feb. 19, 1983.
IBM Tech. Disclosure Bul., vol. 21, No. 12, May 1979, pp. 4909-4910.

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