Patent ID: 6232742
Filing Date: 2001-05-15
Classification: H02M,Y02E

Abstract:
Power inverter apparatus for selectively driving either a three-wire, three-phase ac motor or a three-wire, single-phase ac motor, comprising:an input terminal for receiving a predetermined dc voltage relative to a reference;first, second and third pairs of electrical switches, each pair including first and second series connected switches connected between the input terminal and the reference, with the nodes between the first and second switches of the switch pairs forming first, second and third output terminals;wherein the first, second and third output terminals are connectable to the input terminals of either a three-phase ac motor, having three input terminals and three windings, or a single-phase ac motor, having three input terminals and two windings; anda controller for controllably switching ON and OFF the switches of the first, second and third pairs of switches according to a sequence that provides high-speed pulse-width modulation, such that the apparatus is conditioned to drive either the three-phase motor or the single-phase motor.