Patent ID: 8320138

Claim:
A DC converter, comprising: a transformer comprising a primary winding and a secondary winding; a series resonant circuit in which a current resonant reactor, the primary winding of the transformer, and a current resonant capacitor are connected in series; a conversion circuit for converting a DC voltage of a DC power supply into a rectangular-wave voltage, so as to output the rectangular-wave voltage to the series resonant circuit; a rectifier smoothing circuit for rectifying and smoothing a voltage generated at the secondary winding of the transformer, so as to output a DC output voltage to a load; and a capacitive element connected to the current resonant reactor in parallel, wherein a capacitance of the capacitive element is set as a value of a floating capacitance equivalently present between the primary winding of the transformer multiplied by a value of a magnetizing inductance of the primary winding of the transformer divided by an inductance value of the current resonant reactor.