Core saturation control circuit

Details Core saturation control circuit Core saturation control circuit

1983-12-22

1984-10-16

Wong, Peter S.

Electric power conversion systems

Current conversion

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

363 97, 363 56, H02M 3335

Patent

active

044778678

ABSTRACT:
A closed-loop core saturation control circuit for use in pulse width modulated power supplies is disclosed. The circuit uses a single transistor as a unity gain, low impedance track and hold amplifier to sense the current in the primary winding of the transformer and supply a related voltage to the power supply comparator, where it sums with the linear ramp voltage. The on-times of the switching transistors are therefore individually controlled and varied such that both switching transistors will see substantially equal peak currents.

REFERENCES:
patent: 3859586 (1975-01-01), Wadlington
patent: 4002963 (1977-01-01), Hunter
patent: 4150424 (1979-04-01), Nuechterlein
patent: 4150426 (1979-04-01), Jansson
patent: 4307441 (1981-12-01), Bello
patent: 4322817 (1982-03-01), Kuster

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