견인전동기 고정자 코일의 열화특성 연구

초록

In this paper, 200-class insulation system for form-wond stator coils is designed for AC traction drive with VVVF inverter. Model coils are made to embody all essential elements representing a winding insulation system and structure. Acceleration defradation for model coils is applied exposure to heat(235 °C). In order to investigate the condition of the coils and to determine their insulation reliability, high voltage test and the dielectric properties such as dielectric loaa and capacitance are performed. Also, partial discharge measurement is investigated for internal defects.