Ebrahim Adabi - Faculty of Electrical Engineering Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Tehran, Iran
abolfazl vahedi - Faculty of Electrical Engineering Center of Excellence for Power System Automation and Operation Iran University of Science and Technology Tehran, Iran

This paper presents a current control strategy to reduce the maximum common mode voltage levels of a threephase inverter in adjustable speed drives application. Any reduction of the common mode voltage leads to a decrement of the high frequency related issues of AC drives such as leakage current, EMI noises, shaft voltage and motor bearing damages. Proposed strategy decreases the number of switching per cycle and also increases the current waveforms quality in comparison with traditional hysteresis controllers. Mathematical analyses have been verified through Simulations to investigate the presented method.

Hysteresis current control, AC drives, PWM inverters, Common mode voltage