Power supply device with improved efficiency and reduced higher

Details Power supply device with improved efficiency and reduced higher Power supply device with improved efficiency and reduced higher

1998-04-02

2000-02-22

Berhane, Adolf Deneke

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 37, H02M 112

Patent

active

060287780

ABSTRACT:
In a power supply circuit, a rectification circuit is coupled to a partial smoothing circuit, and an inverting circuit. The rectification circuit includes a rectifier coupled to a primary capacitor. The partial smoothing circuit includes a first, second, and third diode coupled together with the third diode in reverse polarity with the first and second diodes. The partial smoothing circuit also includes a series combination of a choke coil and a smoothing capacitor disposed in parallel with the second diode. A diode extends from the partial smoothing circuit to the inverting circuit. In one embodiment, the inverting circuit includes a main capacitor in parallel with a combination of a winding and an auxiliary capacitor. A switching means is coupled to the inverting circuit and the rectification circuit.

REFERENCES:
patent: 4513226 (1985-04-01), Josephson
patent: 5274540 (1993-12-01), Maehara
patent: 5875107 (1999-02-01), Nagai et al.

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