Self-exciting flyback converter

Details Self-exciting flyback converter Self-exciting flyback converter

1995-08-09

1997-09-16

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 56, 363 95, H02M 3335, H02M 7122, H02M 324

Patent

active

056687044

ABSTRACT:
A self-exciting flyback converter adapted to stabilize an output voltage to be outputted to an external device by controlling the maximum value of a switching current of a switching transistor with a current flowing through a control transistor, the switching transistor switching a current of a primary coil, and the control transistor being a transistor to which an output of a photocoupler which indicates an error in the output voltage is applied. The self-executing flyback converter also has a protective circuit that is designed to bring the switching current of the switching transistor to zero by increasing the current flowing through the control transistor when the output of the photocoupler indicates a drop in the output voltage due to an overload.

REFERENCES:
patent: 4079444 (1978-03-01), Kuhn
patent: 4156273 (1979-05-01), Sato
patent: 4432032 (1984-02-01), Baker et al.
patent: 4439806 (1984-03-01), Braijder
patent: 4577268 (1986-03-01), Easter et al.
patent: 4918564 (1990-04-01), Walker et al.
patent: 4956761 (1990-09-01), Higashi
patent: 5392206 (1995-02-01), Peterson et al.

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