Patent ID: 7944713

Claim:
An electric power conversion circuit, comprising: an input voltage source; a DC loading circuit, including a first rectifier diode and a DC load, wherein the first rectifier diode is coupled in series with the DC load; an inductor, having a main winding and an auxiliary winding; a first switch, connecting in series with the main winding of the inductor to form a switch-inductor combination; a second switch, connecting across the DC loading circuit; and a second rectifier diode, connecting in series with the auxiliary winding of the inductor to form an inductor-diode combination, wherein the polarity of the second rectifier diode is so arranged that reactive flyback current generated from disconnection of the first or second switches is allowed to flow; wherein, the switch-inductor combination and the DC loading circuit are connected in series across the input voltage source, such that when the first switch conducts, the first rectifier diode is forward biased to allow current from the input voltage source to flow through the DC load.