CPC H02P 5/50 (2013.01) [H02P 21/22 (2016.02); H02P 2201/03 (2013.01); H02P 2209/01 (2013.01)] | 16 Claims |
1. A device for driving a plurality of motors, the device comprising:
an inverter connected to a direct current (DC) terminal;
a multi-phase motor connected to the inverter;
a single-phase motor connected to the multi-phase motor; and
a first capacitor and a second capacitor that are connected between both ends of the DC terminal,
wherein a neutral point of the multi-phase motor is connected to a first end of the single-phase motor, and a second end of the single-phase motor is connected to a node between the first capacitor and the second capacitor, and
wherein, by equalizing a neutral point voltage of the multi-phase motor and a DC terminal neutral point voltage between the first capacitor and the second capacitor, only the multi-phase motor is driven among the multi-phase motor and the single-phase motor, current flows through the multi-phase motor, and current does not flow through the single-phase motor.
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