| 摘要 |
A system and method for driving a three-phase induction motor, wherein an inverter power module is provided to supply voltages of three phases to the three-phase induction motor to drive it, a plurality of power supplies are provided to supply powers to a plurality of power devices constituting the inverter power module, and an insulator is provided to insulate the plurality of power supplies and the power module from each other. The present invention can minimize interferences based on a difference between voltages continuously applied to the inverter power module while the three phase voltages are supplied from the inverter power module to the three-phase induction motor. Furthermore, a plurality of photocouplers and a plurality of driving devices constituting the insulator are disposed on a printed circuit board in such a manner that they are spaced apart from one another, thereby minimizing interferences among powers, the amount of abnormal leakage and the effect of a voltage variation on the three-phase induction motor. <IMAGE> |
