AC-DC converter apparatus

Details AC-DC converter apparatus AC-DC converter apparatus

1996-11-19

1998-06-23

Wong, Peter S.

Electric power conversion systems

Current conversion

Having plural converters for single conversion

363 98, 363 25, H02M 700, H02M 324, H02M 3335

Patent

active

057711631

ABSTRACT:
A DC power supply apparatus includes a rectifier circuit for rectifying an input AC voltage to develop a rectified voltage between two output terminals thereof. First and second smoothing capacitors are connected in series between the output terminals of the rectifier circuit. First and second voltages developed across the first and second capacitors are applied to first and second inverters which convert the applied voltages to high-frequency voltages, which, in turn, are applied to a transformer. The transformer develops a transformed high-frequency voltage which is converted to a DC voltage by a converter. A voltage detector detects the first and second voltages, and the detected first and second voltages are compared in a microprocessor. An inverter control circuit controls the first and second inverters in accordance with the result of comparison, in a sense to make the voltages across the first and second smoothing capacitors equal.

REFERENCES:
patent: 4062057 (1977-12-01), Perkins et al.
patent: 4347558 (1982-08-01), Kalinsky
patent: 4525774 (1985-06-01), Kino et al.
patent: 4686619 (1987-08-01), Edwards
patent: 5229928 (1993-07-01), Karlsson et al.
patent: 5272313 (1993-12-01), Karino et al.
patent: 5355295 (1994-10-01), Brennen

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