On the overvoltage of three phase induction motor fed by two levels inverter

The use of long cables in the PWM inverter-motor association generate transient voltage pulses at the inverter which consequently behaves like progressive waves on these cables. Thereby, this phenomenon produces voltage reflection that causes overvoltage problem at the motor terminals. High frequency simulation models for the cables and motors are the key tools to obtain an accurate study of overvoltage problem. In this paper, the high frequency models of cable and induction motor are developed and implemented in Simulink. The simulation results show that the overvoltage at the motor terminals increases when the length of cable and switching frequency increase.