Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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Evaluation of Winding Insulation of IGBT PWM Inverter-Fed Low-Voltage Induction Motors

  • Park Doh-Young (Mechatronics Research Group, Korea Electrotechnology Research Institute(KERI)) ;
  • Hwang Don-Ha (Mechatronics Research Group, Korea Electrotechnology Research Institute(KERI)) ;
  • Kim Yong-Joo (Mechatronics Research Group, Korea Electrotechnology Research Institute(KERI)) ;
  • Kang Do-Hyun (Mechatronics Research Group, Korea Electrotechnology Research Institute(KERI)) ;
  • Lee Young-Hoon (School of Electrical & Electronic Eng., Yeungnam University) ;
  • Kim Dong-Hee (School of Electrical & Electronic Eng., Yeungnam University) ;
  • Lee In-Woo (Industrial Performance Group, Hyosung Corporation)
  • Published : 2001.10.01
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Abstract

IGBT inverters have switching rise times of 0.2-2 $\mu$ sec, and have been believed to cause insulation stresses and premature motor failures. Inverter driven induction motors with high speed switching and advanced PWM techniques are widely used for variable speed applications. Recently, the insulation failures of stator winding have attracted many concerns due to high dv/dt of IGBT PWM inverter output. In this paper, the detailed insulation test results of 19 low-voltage induction motors are presented. Different types of insulation techniques are applied to 19 motors. The insulation characteristics are analyzed with partial discharge, discharge inception voltage, and dissipation factor tests. Also, breakdown tests by high voltage pulses are performed, and the corresponding breakdown voltages are obtained.

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