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http://dx.doi.org/10.5207/JIEIE.2006.20.3.045

Analysis on the Effect of LCR Filter to Mitigate Transient Overvoltage on the High Voltage Induction Motor Fed by Multi Level Inverter  

Kim, Jae-Chul (숭실대학교 전기공학과)
Kwon, Young-Mok (숭실대학교 대학원 전기공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.20, no.3, 2006 , pp. 45-52 More about this Journal
Abstract
In this paper, we analyze on the effect of LCR filter to mitigate transient overvoltage on the high voltage induction motor fed by H-bridge cascaded 7-level inverter. The switching surge voltage that it was occurred in inverter appears transient overvoltage at the motor input terminal. the transient overvoltage 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 transient overvoltage appears more serious in high voltage induction motor than low voltage induction motor. We selected LCR filter for reduction of the transient overvoltage. Consequently, we demonstrated that the LCR filter connected to the invertor output terminals greatly reduces the transient voltage stress and ringing. The results of simulation show the suppression of transient overvoltage at the motor end of a long cable. using EMTP
Keywords
ASD; Cable; EMTP; High-voltage induction motor; PWM; Switching surge;
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