Switching power circuit with current resonance for zero current

Details Switching power circuit with current resonance for zero current Switching power circuit with current resonance for zero current

1997-08-06

1998-05-12

Berhane, Adolf

Electric power conversion systems

Current conversion

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

363131, H02M 3335

Patent

active

057515603

ABSTRACT:
A transformer has a primary winding including a first end which is connected to a first input terminal. A switching transistor is connected between a second end of the primary winding and a second input terminal. Timing circuits control an on-off operation of the transistor while a rectifying and smoothing circuit provided on the secondary side of the transformer rectifies and smooths an output from the transformer. In the switching power circuit, a parallel circuit of a capacitor and an inductance element absorbs charges from the capacitor connected in series to the primary winding of the transformer, while a resonance capacitor connected between the collector and the emitter of the switching transistor forms a voltage resonance circuit with the main inductance of the primary winding of the transformer.

REFERENCES:
patent: 4385347 (1983-05-01), Takematsu
patent: 5383106 (1995-01-01), Yoshida et al.
patent: 5412555 (1995-05-01), Uramoto
patent: 5475580 (1995-12-01), Noro
patent: 5515256 (1996-05-01), Yokoyama
K. Suzuki, Japanese Publ. No. 59-209068, Patent Abstracts of Japan, E-306, Apr. 4, 1985, vol. 9, No. 75.
S. Inagi, Japanese Publ. No. 1-234055, Patent Abstracts of Japan, E-860, Dec. 14, 1989, vol. 13, No. 564.
T. Oshikata, Japanese Publ. No. 2-87968, Patent Abstracts of Japan, E-941, Jun. 15, 1990, vol. 14, No. 278.

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