Analysis of Multilevel Inverter Fed Open-End Winding Induction Motor Drive for Reduction of Zero Sequence Voltage

The Zero Sequence Voltage generated by a conventional two level inverter fed induction motor drive results to various adverse effects like bearing currents and electromagnetic interference. By using conventional multilevel inverter the switching losses, complexity and the cost of the equipment increases as the number of levels increases and also the bearing currents still exists. In this proposed work, the techniques to overcome the drawbacks due to conventional inverter and multilevel inverter have been presented i.e, by using proposed multilevel inverter fed open end winding. In this paper, the performance characteristics of Induction motor with different PWM techniques like SPWM, THIPWM have been analyzed and the harmonic analysis has been carried out using MATLAB/SIMULINK environment and to validate the results for different modulation index are listed out.