Ringing choke converter

A ringing choke converter power supply device comprising

• a ringing choke converter power supply comprising a transformer in which a DC input voltage is impressed on an anode of a primary winding, a switching element in which a reference voltage line on the input side is connected to an output terminal, a first secondary circuit for outputting a DC voltage by rectification smoothing a switching signal generated in a first secondary winding of said transformer, a second secondary circuit for the DC voltage by rectification smoothing a switching signal generated in a second secondary winding of said transformer, a voltage detection winding provided in said transformer, a current limit resistance disposed between said voltage detection winding and a control terminal of said switching element, a feedback diode having a cathode terminal connected to a connecting point between said voltage detection winding and said current limit resistance, a Zener diode having a cathode terminal connected to a connecting point between said current limit resistance and said control terminal of said switching element, and a capacitor for connecting said reference voltage line to a connecting point between said feedback diode and said Zener diode;
• a saturable reactor provided on a primary or secondary side of said ringing choke converter power supply and having the same core winding with two windings;
• a signal processing circuit for performing an arithmetic operation with respect to output voltages of said first and second secondary circuits of said ringing choke converter power supply;
• and
• a control circuit for transmitting a control signal to said saturable reactor in such a direction that an error signal obtained by comparing a signal processed by said signal processing circuit with a predetermined reference voltage becomes zero.