Power supply with plural outputs supplying dynamic and steady lo

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter

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H02M 3335

Patent

active

053633237

ABSTRACT:
A plural output power supply comprises a converter transformer having a first primary winding and first and second secondary windings. A first DC output circuit is driven by the first secondary winding and comprises a first series rectifier, a first series inductor wound on a first core and a first parallel capacitor. A second DC output circuit is driven by the second secondary winding and comprises a second series rectifier, a second series inductor wound on a second core and a second parallel capacitor. A sense transformer or series resistor senses a current in the first primary winding of the converter transformer. Circuitry subtracts the current in the second secondary winding from current sensed from the primary winding. If the first DC output is used to drive the stable load and the second DC output is used to drive the noisy load, the difference in the two currents represents the stable current and is used to control the drive to the primary of the converter transformer.

REFERENCES:
patent: 4058758 (1977-11-01), Peterson
patent: 4419723 (1983-12-01), Wilson, Jr.
patent: 4660136 (1987-04-01), Montorefano
patent: 4679132 (1987-07-01), Jirka
patent: 4884180 (1989-11-01), Hoffmann
patent: 5005112 (1991-04-01), Kuriyama
patent: 5036452 (1991-07-01), Loftus
patent: 5117347 (1992-05-01), Rebello et al.

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