Patent ID: 8405341
Filing Date: 2013-03-26
Classification: H02K,H02P

Abstract:
1. A synchronous motor drive system comprising: three-phase inverters each configured to convert DC power to three-phase AC power; a control circuit configured to control operations of the three-phase inverters; and a synchronous motor configured to include three-phase coils supplied with three-phase AC power from the three-phase inverters, wherein, the three-phase inverters include first and second three-phase inverters, and the control circuit controls the operations of the three-phase inverters by causing the first and the second three-phase inverters to use carrier signals at different frequencies from each other to generate three-phase AC power, each of the first and the second three-phase inverters supplies a different one of the three-phase coils with three-phase AC power, the synchronous motor has a stator in which stator coils are arranged along a rotation direction of the synchronous motor, each of the stator coils constitutes one phase of one of the three-phase coils, and the stator coils include a first stator coil and a second stator coil arranged adjacent to each other, the first stator coil constituting one phase of one of the three-phase stator coils that is supplied with three-phase AC power from the first three-phase inverter, the second stator coil constituting said one phase of another one of the three-phase stator coils that is supplied with three-phase AC power from the second three-phase inverter.