Patent ID: 8537575

Claim:
A power conversion system, comprising: a rectifier operative to provide DC output power at a rectifier DC output; an inverter comprising an inverter DC input, and operative to provide AC output power to a load; and a DC link choke comprising at least four coils coupled between the rectifier DC output and the inverter DC input, the DC link choke comprising: a core structure comprising: a first leg including first and second ends and an intermediate portion disposed between the first and second ends, a second leg including first and second ends and an intermediate portion disposed between the first and second ends, a third leg extending between the first ends of the first and second legs, and a fourth leg extending between the second ends of the first and second legs, at least one shunt providing a magnetic flux path between the intermediate portions of the first and second legs, a first winding forming a first coil coupled between the rectifier DC output and the inverter DC input, the first winding forming at least one turn around the first leg between the intermediate portion and the first end of the first leg, a second winding forming a second coil coupled between the rectifier DC output and the inverter DC input, the second winding forming at least one turn around the first leg between the intermediate portion and the second end of the first leg, a third winding forming a third coil coupled between the rectifier DC output and the inverter DC input, the third winding forming at least one turn around the second leg between the intermediate portion and the first end of the second leg, and a fourth winding forming a fourth coil coupled between the rectifier DC output and the inverter DC input, the fourth winding forming at least one turn around the second leg between the intermediate portion and the second end of the second leg.