High power factor AC/DC converter

Details High power factor AC/DC converter High power factor AC/DC converter

1992-09-28

1994-04-05

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 37, 363 81, 363 89, H07M 706

Patent

active

053010957

ABSTRACT:
A high power factor AC/DC converter is disclosed. In the AC/DC converter in which a rectifying circuit RC1 rectifies a commercially available AC power supply Ei, a switching device turns on and off so that the rectified voltage is applied across the primary winding n1 of the transformer Tr1 to provide a high frequency voltage across the secondary winding n2, and the high frequency voltage is rectified by means of a rectifying circuit connected across the secondary winding so as to generate a predetermined DC output, a choke coil (L1) and a diode (D1) are interposed between the rectifying circuit (RC1) and a smoothing capacitor (C1) and a capacitor (C3) is interposed between a first junction and a second junction. The first junction connects the choke coil (L1) to the diode (D1) and the second junction connected the switching device (Q1) to the primary winding (n1) of the transformer (Tr1).

REFERENCES:
patent: 4340931 (1981-01-01), Endo et al.
patent: 4412277 (1983-10-01), Mitchell
patent: 4523266 (1985-06-01), Nelson
patent: 4525774 (1985-06-01), Kino et al.
patent: 4706180 (1987-11-01), Wills
patent: 4809310 (1989-02-01), Salesses et al.
patent: 4956760 (1990-09-01), Gulczynski
Technical Report of IEICE-PE93-28 (Jul. 1993) (pp. 65-71) (undated).
International Rectifier Co., "HEXFET DATABOOK", 1985, p. A-104, FIG. 9, Circuit Diagram of 100 KHz Wide Range Power Supply.

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