Patent ID: 6785151
Filing Date: 2004-08-31
Classification: H02M,Y02B

Abstract:
A regulated switching power supply circuit producing a regulated output voltage, comprising:an inverter circuit that produces an alternating inverter voltage having two half-cycles; at least two switching circuit branches, each comprising at least one saturable core inductor in series with a switching device having current switching terminals and a control terminal, each of said switching circuit branches coupled via a transformer to said inverter voltage; a magnetic amplifier control circuit which compares the output voltage to a voltage reference to produce an error signal, and which in response to said error signal provides variable reset current to said saturable core inductors to set said saturable core inductors to a current blocking state for a variable blocking interval during at least one of said half-cycles of said inverter voltage; and a freewheeling rectifier connected to bypass said said switching branches and transformer during at least part of said variable blocking interval.