Patent ID: 6943510
Filing Date: 2005-09-13
Classification: H02P

Abstract:
1. An excitation circuit for a flux switching motor having a field winding and an armature winding, comprising: a rectifier circuit for converting an AC input signal into a rectified AC signal; an H-bridge switching circuit responsive to said rectified AC output and being coupled across said armature winding, said H-bridge switching circuit including a plurality of switches, at least a designated pair of said switches each having a bypass element; an armature energy recovery capacitor coupled across an output of said switching circuit: said bypass elements of said designated pair of switches of said H-bridge switching circuit permitting recirculation of armature current through said armature winding during a start-up phase of operation of said motor regardless of a direction of current flow through said armature winding; and a controller for controlling on and off switching of each of said switches of said H-bridge circuit.