Power factor and crest factor circuit

Details Power factor and crest factor circuit Power factor and crest factor circuit

1997-07-08

1998-11-10

Hecker, Stuart N.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

363 17, H02M 706

Patent

active

058353690

ABSTRACT:
A power factor and crest factor correction circuit for a power distribution network of the type comprising a low power source for supplying a plurality of ports with an ac signal is disclosed. Each port comprises a rectifier bridge, a bulk storage capacitor and a power converter connected across the rectifier bridge, The power factor and crest factor correction circuit comprises an inductor, series connected between the rectifier bridge and the bulk capacitor, for reducing the current peaks in a rectified signal received from the rectifier bridge. The correction circuit also comprises diode means connected in parallel across the inductor for discharging the bulk capacitor whenever the voltage across the bulk capacitor exceeds the voltage of the rectified signal. As a result, a higher power factor is obtained for the dc signal applied to the power converter, and also the current peaks in the dc signal are substantially reduced.

REFERENCES:
patent: 3737755 (1973-06-01), Calkin et al.
patent: 4275436 (1981-06-01), Peterson
patent: 4672522 (1987-06-01), Lesea
patent: 5172308 (1992-12-01), Tohya
patent: 5351179 (1994-09-01), Tsai et al.
patent: 5576940 (1996-11-01), Steigerwald et al.

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