Analysis on the effect of RC filter to mitigate transient overvoltage on the high voltage induction motor fed by Multi level inverter

멀티레벨 인버터 구동 고압유도전동기에서 발생하는 과도과전압 저감을 위한 RC필터의 효과분석

In this paper, we analyze on the effect of RC filter to mitigate transient overvoltage on the high voltage induction motor fed by H-bridge cascaded 7-level inverter. The switching surge voltage becomes the major cause to occur the insulation failure by serious voltage stress in the stator winding of high voltage induction motor. The effect of switching surge appears more serious in high voltage induction motor than low voltage induction motor. Consequently, we demonstrated that the RC filter connected to the motor terminals greatly reduces the transient voltage stress md ringing. The results of simulation show the suppression of transient overvoltage at the motor end of a long cable. using EMTP