Patent ID: 6137704
Filing Date: 2000-10-24
Classification: H02M,H02P

Abstract:
A power conversion apparatus, comprising:a power converter including a plurality of semiconductor switching elements which operate to perform power conversion, thereby to output polyphase alternating current;an ac load circuit connected to an ac output side of the power converter; anda zero-phase power supply device connected to the ac load circuit and to the power converter,wherein the power converter, ac load circuit, and the zero-phase power supply device are connected in the form of a loop, so that voltage and current of the zero-phase power supply device provide zero-phase-sequence components when viewed from the ac output side of the power converter through the ac load circuit, andwherein the power converter performs time-sharing operations to supply and receive electric power to and from the ac load circuit, and supply and receive zero-phase-sequence power to and from the zero-phase power supply device.