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황돈하(D.H. Hwang),박도영(D.Y. Park),김용주(Y.J. Kim),김동희(D.H. Kim),구자윤(J.Y. Koo),이인우(I.W. Lee) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
In this paper, the insulation characteristics test results of 25 low-voltage induction motors (3Φ, 5HP, 380V) are presented. Five different types of insulation techniques are applied to 25 motors. The maximum partial discharge (PD) magnitude (Qm), discharge inception voltage (DIV), dissipation factor tip-up (Δ tan δ), and rate of change in AC current (Δ I) are measured by PD and AC current tests Also, the insulation breakdown tests by high voltage pulse are performed, and the corresponding breakdown voltages are obtained.
IGBT PWM 인버터 구동 유도전동기의 절연성능 향상기술 연구
황돈하(D.H. Hwang),박도영(D.Y. Park),김용주(Y.J. Kim),이영훈(Y.H. Lee),김동희(D.H. Kim),이인우(I.W. Lee) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
The recent advancements in power electronic switching devices have enabled high frequency switching operation and have improved the performance of pulse-width modulated (PWM) inverters for driving induction motors. But, the insulation failures of stator winding have attracted much concern due to high dv/dt of IGBT PWM inverter. In this paper, the test results for evaluation on the stator winding insulation of low-voltage induction motors for IGBT PWM inverter applications are presented The insulation characteristics are analyzed with partial discharge and dissipation factor tests. Also, insulation breakdown tests by switching pulse voltage are performed. An effective insulation technique to enhance the insulation strength is suggested from the test results.<br/>