Patent ID: 7612509
Filing Date: 2009-11-03
Classification: H02P

Abstract:
1. A motor controller comprising: a motor having a plurality of stator windings opened at both ends; an inverter circuit configured with a plurality of phases of switch blocks whose output terminals are connected to one ends of the stator windings; a switch unit circuit configured with a plurality of phases of switch blocks whose output terminals are connected to the other ends of the stator windings; a control circuit for controlling respective switch elements of the inverter circuit and the switch unit circuit; and an energy storage source connected to respective direct-current voltage input terminals of the inverter circuit and the switch unit circuit; wherein at least one of the switch blocks of the switch unit circuit comprises a first element and a second element connected in series, wherein the first element comprises a first switch element and the second element comprises a first diode without any switching elements, and wherein at least one of the switch blocks of the inverter circuit comprises a second switch element and a third switch element connected in series.