A Hysteresis Current Control Strategy for Common-Mode Voltage Reduction in AC Drive Systems

作者：Adabi M Ebrahim^*; Vahedi A

来源：International Review of Electrical Engineering, 2011, 6(2): 607-617.

• Hysteresis Current Control
• AC Drives
• PWM Inverters
• Common Mode Voltage

This paper presents a current control strategy to reduce the maximum common mode voltage levels of three-phase two-level inverters 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. A comparative study with other famous hysteresis switching strategies shows that proposed method decreases the switching frequency. Also, a three-level inverter, has seven different values of common mode voltages. Elimination of switching vectors which leads to maximum common mode voltage levels from the switching algorithm is the best option in controlling common,node voltage. In this structure, the quality of the current waveform increases due to variety of switching options. Mathematical analyses have been verified through Simulations to investigate the presented method.

• 出版日期2011-4