METHOD FOR IMPROVING OVERMODULATION PERFORMANCE OF AN INVERTER FOR THE ENHANCED OUTPUT TORQUE OF AC MOTORS AND CIRCUIT THEREOF

摘要

The present invention relates to a method for improving over-modulation performance of an inverter for improving output torque of an AC motor, and the method for improving over-modulation performance of an inverter according to an embodiment of the present invention comprises: calculating a compensation voltage for feedback compensation, Compensating the compensation voltage to the three-phase command voltage given from the current controller may include performing an overmodulation operation using the compensated three-phase command voltage. According to the present invention, when the over-modulation operation is performed by using the method for improving the over-modulation performance of the inverter according to the present invention when driving an AC motor, the voltage gain of the inverter is compensated compared to the case of applying only the existing over-modulation technique, thereby improving the over-modulation performance. This can effectively improve the output torque performance of the AC motor when using the overmodulation region of the inverter.