Patent ID: 9024605
Filing Date: 2015-05-05
Classification: H02M

Abstract:
1. A power supply device, comprising: a first DC power supply; a load circuit including a second DC power supply; a chopper circuit that includes at least one switching element and one flywheel semiconductor element and a reactor connected to a connection point between the switching element and the flywheel semiconductor element and is connected between the first DC power supply and the load circuit; and a filter circuit that includes a filter coil and a filter capacitor and is connected between the first DC power supply and the chopper circuit or between the second DC power supply and the chopper circuit; wherein a DC-current-inductance characteristic curve of the filter coil and a DC-current-inductance characteristic curve of the reactor intersect each other, and a inductance value of the reactor is made larger than that of the filter coil in a region of current lower than a current value at the intersecting point.