High-Performance Inverter Based on Shaft Acceleration Torque for AC Drives

This paper proposes a high-performance inverter control method based on the shaft acceleration torque. The conventional overmodulation method has both advantages and disadvantages. The proposed method considers the motor driving condition from the acceleration torque command and the omitted voltage caused by voltage saturation and automatically judges whether overmodulation should be used. Therefore, this method combines the advantages of using overmodulation and the advantages of not using overmodulation and obtains both a quick speed response in the transient state and a small value of total harmonic distortion in the steady state. The experimental results verify the effectiveness of the proposed high-performance inverter control method.