Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1994-12-14
1996-04-16
Nguyen, Matthew V.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 97, H02M 3335, H02M 324
Patent
active
055089046
ABSTRACT:
A switching regulator includes a primary-side circuit having a rectifier circuit without a smoothing circuit for applying a high-frequency pulse input voltage to a primary side of a high-frequency transformer, a secondary-side circuit including a rectifier circuit and a smoothing circuit at a secondary side of the high-frequency transformer, a superimposing chopping-wave voltage forming circuit for forming a chopping-wave voltage or a saw-tooth-wave voltage in synchronism with a pulse frequency of the primary-side circuit to superimpose a secondary-side d.c. output detecting voltage on the chopping-wave voltage or the saw-tooth-wave voltage, a control circuit which outputs a pulse signal when the chopping-wave voltage or the saw-tooth-wave voltage formed by the superimposing chopping-wave voltage forming circuit exceeds a reference voltage and lowers a clock pulse in level by use of a latch characteristic on the basis of the outputted pulse signal and hold the clock pulse till a rising of a succeeding clock pulse to output the clock pulse to the primary-side circuit as a switching pulse signal, and a step-up circuit having a bypass line and an inductor arranged in parallel to each other between the rectifier circuit and the high-frequency transformer in the primary-side circuit.
REFERENCES:
patent: 4956761 (1990-09-01), Higashi
patent: 5063489 (1991-11-01), Inaba
patent: 5267133 (1993-11-01), Motomura et al.
patent: 5297014 (1994-03-01), Saito et al.
patent: 5408402 (1995-04-01), Nonnenmacher
patent: 5414611 (1995-05-01), Muto et al.
patent: 5440473 (1995-08-01), Ishii et al.
Nguyen Matthew V.
Nihon Protector Co., Ltd.
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