Patent ID: 8125304

Claim:
A motor drive comprising: rectifier circuitry coupled to an AC power source and configured to provide power to a DC bus; inverter circuitry coupled to the DC bus and configured to generate drive signals for driving a motor; a choke assembly coupled to the DC bus and comprising: a bobbin; a preformed inductor coil wound around the bobbin; a preformed insulative container comprising an outer wall, an integral base and a hollow projection extending from the base of the container and creating an internal space between the wall of the container and the projection, the bobbin fitting over the hollow projection and the space configured to receive the inductor coil on the bobbin, the projection forming a passageway through the container; an annular cover disposed over the container and configured to seal the inductor coil inside the container; an E-shaped magnetic core having a center projection and two side projections, wherein the container, coil and cover are disposed over one of the side projections; and an I-shaped core disposed over the annular cover.