PERFORMANCE ANALYSIS OF MULTILEVEL INVERTER FED OPEN END WINDING INDUCTION MOTOR

Abstract

Resultant space vector locations generated fiorn dual two-level inverters for open-end winding induction motor are similar to a single three level inverter. The topology eliminates the clamping diodes and tapped DC-link capacitors. Two isolated DC supplies are required in this topology but DC-link voltages and switching device voltage rating are reduced by half as compared 10 conventional single inverter scheme. More number of redundant voltage space vectors in the scheme gives more degree of freedom for SVP\VM control. Dual two-level inverters for open—end induction motor drive are designed and developed Using synchronized SVPWM. The mathematical model of dual inverters for open-end induction motor drive is developed and the performance of proposed scheme is evaluated using four different space vector pulse pattern arrangements. The complete elimination of common mode voltage is achieved in one of the implementations. Extensive simulation results are presented under different operating conditions to investigate the steady state, transient performance of dual inverter fed open-end winding induction motor.