Cascaded rectifier and two switched voltage converter circuits w

Details Cascaded rectifier and two switched voltage converter circuits w Cascaded rectifier and two switched voltage converter circuits w

1992-02-25

1993-12-21

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

323266, 323271, 363 71, 363 89, H02M 3335

Patent

active

052726134

ABSTRACT:
A power supply circuit includes a cascade arrangement of a full-wave rectifier and a first and a second switched voltage converter. The input terminals of the first voltage converter receive a rectified supply voltage. The second switched voltage converter has input terminals connected to a first storage capacitor of the first voltage converter. The second voltage converter includes the output terminals of the power supply circuit. A control circuit controls the period of conductance of the controlled switches of the switched voltage converters with a switching period which is much shorter than the cycle period of the AC supply voltage. A first inductive element is connected via a first controlled switch across the output terminals of the full-wave rectifier during a part of the switching period. A first rectifier diode is connected to the first inductive element so that the diode is non-conducting during this part of the period and, during the period when the diode is conducting, the diode current does not flow to the input terminals of the first switched voltage converter.

REFERENCES:
patent: 4486823 (1984-12-01), Palm
patent: 4516168 (1985-05-01), Hicks
patent: 4530043 (1985-07-01), Palm et al.
patent: 4679131 (1987-07-01), Filliman
patent: 5019952 (1991-05-01), Smolenski et al.
"Power Supply Circuit," IBM Tech. Discl. Bul., vol. 27, No. 11, pp. 6500-6501, Apr. 1985.

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