Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1994-08-29
1996-08-20
Nguyen, Matthew V.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363133, H02M 3335, H02M 7538
Patent
active
055485022
ABSTRACT:
To provide a resonant switching power supply switch with a simple structure and little noise, a push-pull resonant switching power supply circuit includes a transformer 104, a capacitor 105, two transistors 106a and 106b (bipolar transistors or field-effect transistors), and a bias circuit 201. The transformer 104 has a rectification circuit 340 connected to its secondary winding. The capacitor 105 forms a parallel resonant circuit in combination with the transformer 104. The transistors 106a and 106b are push-pull connected to the primary winding of the transformer 104 and the bases of which are connected to a feedback winding 104 of transformer. The bias circuit 201 applies a variable bias voltage to the base of the transistors.
REFERENCES:
patent: 4422050 (1983-12-01), Suzuki
patent: 4560918 (1985-12-01), Callen
patent: 4734828 (1988-03-01), Vargo
patent: 4811187 (1989-03-01), Nakajima et al.
patent: 5327337 (1994-07-01), Cripe
patent: 5345374 (1994-09-01), Sato et al.
Patent Abstracts of Japan, unexamined applications, E field, vol. 17 No. 319, Jun. 17, 1993 p. 66 E 1383; & JP-A-05 30 742 (NEC Corporation).
Hamamatsu Photonics K.K.
Nguyen Matthew V.
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