Analysis of insulation characteristics of PWM inverter-fed induction motors

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 windings have attracted much concern due to high dv/dt of IGBT PWM inverter output. In this paper, the detailed insulation test results of 25 low-voltage induction motors are presented. Five different types of insulation techniques are applied to 25 motors. The insulation characteristics are analyzed with partial discharge, discharge inception voltage, AC current, and dissipation factor tests. Also, breakdown tests by high voltage pulses are performed.

[1]  Yilmaz Sozer,et al.  New inverter output filter topology for PWM motor drives , 2000 .

[2]  J. Erdman,et al.  Assessing AC motor dielectric withstand capability to reflected voltage stress using corona testing , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[3]  E. Persson,et al.  Transient effects in application of PWM inverters to induction motors , 1991 .

[4]  C. J. Melhorn,et al.  Transient effects of PWM drives on induction motors , 1995, Proceedings of 1995 Industrial and Commercial Power Systems Conference.

[5]  A. von Jouanne,et al.  Design considerations for an inverter output filter to mitigate the effects of long motor leads in ASD applications , 1997 .

[6]  J. P. Bellomo,et al.  Electrical stresses applied to stator insulation in low-voltage induction motors fed by PWM drives , 1997 .

[7]  Matthias Berth,et al.  Electrical stress and failure mechanism of the winding insulation in PWM-inverter-fed low-voltage induction motors , 2000, IEEE Trans. Ind. Electron..

[8]  David Leggate,et al.  Interaction of drive modulation and cable parameters on AC motor transients , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[9]  Jin-Hong Kim,et al.  Analysis of insulation characteristics of low-voltage induction motor driven by IGBT PWM inverter , 2000, Conference Record of the 2000 IEEE International Symposium on Electrical Insulation (Cat. No.00CH37075).

[10]  A. von Jouanne,et al.  Design considerations for an inverter output filter to mitigate the effects of long motor leads in ASD applications , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[11]  A. H. Bonnett,et al.  A comparison between insulation systems available for PWM inverter fed motors , 1996, Proceedings of 1996 IAS Petroleum and Chemical Industry Technical Conference.