Transformer coupled up-down converter

Details Transformer coupled up-down converter Transformer coupled up-down converter

1982-03-29

1983-12-20

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 97, 363131, H02P 1322

Patent

active

044221398

ABSTRACT:
A transformer coupled DC-to-DC converter provides a regulated output with only one active switch. The converter includes a switch, a diode and an inductor coupled to the primary of a transformer in a way which provides symmetry to the transformer as the duty cycle of the switch changes for regulation. The circuit may be current-fed by supplying an input voltage higher than the transformer ratio would indicate, or may be voltage-fed by providing an input voltage lower than the transformer ratio would indicate. The circuit is operated to charge an inductor through the switch and half the primary of a transformer and discharge the inductor through the other half of the primary so that equal energy is provided through the transformer during charging and discharging, thereby providing a symmetrical signal without the need for more than one switch.

REFERENCES:
patent: 4025863 (1977-05-01), Higuchi
patent: 4122514 (1978-10-01), Amin
Intersil, Application Bulletin A035, "Switchmode Converter Topologies-Make Them Work for You", by Rudy Severns, .COPYRGT.1980, pp. 1/32 and 18/32 only.
IEEE Trans. on Consumer Electronics, vol. CE-26, pp. 142-148, Feb. 1980.

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