Patent ID: 11909343
Assignee: HYUNDAI MOTOR COMPANY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 6:
7. A motor-driving apparatus for driving a motor having a plurality of first windings corresponding to a plurality of phases, respectively, comprising:
a first inverter including a plurality of first switching devices and connected to first ends of the plurality of first windings;
a second inverter including a plurality of second switching devices;
a plurality of third switching devices having first-side ends connected to second ends of the plurality of first windings, respectively, and having second-side ends connected to each other; and
a controller configured to form a Y-connection by turning on the plurality of third switching devices and to drive the motor by performing pulse-width modulation control on the plurality of first switching devices when a required output of the motor is less than a preset reference value, and to turn off the third switching device and to drive the motor as an open-end winding motor by performing pulse-width modulation control on the first and second switching devices when the required output of the motor is equal to or greater than the reference value;
wherein each of the plurality of switching devices of the third switching device corresponds to different one of the plurality of phases, and
wherein each of the plurality of switching devices of the third switching device comprises a power semiconductor.