Switching power supply using a saturable reactor to control a sw

Details Switching power supply using a saturable reactor to control a sw Switching power supply using a saturable reactor to control a sw

1986-04-21

1987-10-13

Beha, Jr., William H.

Electric power conversion systems

Current conversion

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

363 49, 363131, H02M 3338

Patent

active

047002808

ABSTRACT:
In a self-oscillating type switching power supply in which an input source, a primary winding of a transformer, and a switching element are connected in series, and a constant output is supplied to a load from a secondary winding of the transformer by the operation of the switching element, in order to obtain a signal to turn off the switching element, a sense circuit for detecting the output of the switching power supply is provided, and the analog signal from the sense circuit is inputted to one winding of a saturable reactor, and at a time point when the switching element is to be turned off, the analog input signal is converted into a pulse signal insulated from the analog input signal, and the pulse signal is outputted from another winding of the saturable reactor. By such a system, a switching power supply having a very simple circuit arrangement and high output voltage precision can be achieved.

REFERENCES:
patent: 3697851 (1972-10-01), Mast
Kohuo et al., "A Saturable Reactor Controlled Ringing Choke Converter", INTELEC Conference Paper, pp. 265-271, Wash. D.C. (26-29, Nov. 1969).
Harada et al., "Pulse Synchronizing DC-to-DC Converters", PESC '80 Conference Paper, pp. 302-307, Atlanta, Ga. (16-20, Jun. 1980).

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