스위칭 서지에 의한 고압유도전동기의 권선의 전기적 스트레스 해석

Electrical Stress Analysis of High Voltage motor Winding by Switching Surge

Studies have been made to establish what coil design parameters have an important influence on the amplitude of interturn voltages developed in a machine winding subject to steep-fronted surges. The studies are based on a lattice-diagram model of multi conductor transmission line in a machine winding energised by a simple ramp function. Variations in interturn voltages produced by changes in insulation thickness, insulation permittivity, surge wave-front are examined and certain guidelines for avoiding high interturn voltages are evaluated.