SMPS apparatus having a demagnetization circuit

Details SMPS apparatus having a demagnetization circuit SMPS apparatus having a demagnetization circuit

1990-02-12

1991-07-16

Stephan, Steven L.

Electric power conversion systems

Current conversion

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

363 97, H02M 3335

Patent

active

050329677

ABSTRACT:
A switched mode power supply circuit includes a controllable switch in series with an inductive element between the terminals of a DC input voltage. A control circuit renders the switch alternately conductive and non-conductive. A rectifier for deriving a DC output voltage is coupled to the inductive element. To prevent the inductive element from becoming saturated, a switching element is coupled to the control circuit for maintaining the controllable switch in its blocked state only during a time interval which immediately follows an interval of conductance of the controllable switch and during which the voltage across the inductive element has the same polarity as when the rectifier is conductive.

REFERENCES:
patent: 4564820 (1986-01-01), Peruth et al.
patent: 4593347 (1986-06-01), Peruth et al.
patent: 4597036 (1986-06-01), Paulik et al.
patent: 4608625 (1986-08-01), Josephson et al.
patent: 4648016 (1987-03-01), Peruth et al.
patent: 4688159 (1987-08-01), Marinus
patent: 4694385 (1987-09-01), Marinus
patent: 4766528 (1988-08-01), Marinus
patent: 4794508 (1988-12-01), Carroll

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