Multilevel Inverter to Eliminate Common Mode Voltage in Induction Motor Drives

Common mode voltage (CMV) is responsible for premature failure of bearing of induction motor when supplied from fast switching devices. In this paper, five level diode clamped multilevel inverter is proposed to eliminate CMV by selecting specific switching states. In addition to eliminate CMV, proposed inverter reduces switching losses, dv/dt and gives high quality output. MATLAB simulation shows the validity of proposed scheme.