Verification of the applicability of an RF-signal-based detection method for partial discharges on inverter-fed random wound stator windings in a low-voltage induction motor

Partial discharges (PD) are widely known to occur in medium- and high-voltage applications. Recently, it has been observed that owing to the use of modern variable frequency converters, an environment that contributes to partial discharges is also found in low-voltage motors. Low-voltage machines are vulnerable to partial discharges because their winding insulation is not designed to withstand the phenomenon. As the number of inverter-driven systems is growing, the PD become a critical reliability issue. Therefore, methods to measure the phenomenon are required for the purposes of product development and maintenance. In this paper, detection of partial discharges in random wound low-voltage induction motors is studied by applying a radio-frequency-signal-based measurement setup for online partial discharge measurements.

[1]  Jussi Tamminen,et al.  Radio-frequency-based detection of electrical discharge machining bearing currents , 2011 .

[2]  Peter Tavner,et al.  Review of condition monitoring of rotating electrical machines , 2008 .

[3]  M.F. Rahman,et al.  Partial discharge measurements in PWM inverter-driven low-voltage motors , 2009, 2009 Australasian Universities Power Engineering Conference.

[4]  B. Banakara,et al.  Non-uniform voltage distribution in stator winding of PWM fed induction motor , 2008, TENCON 2008 - 2008 IEEE Region 10 Conference.

[5]  W. Pfeiffer,et al.  Partial discharge characteristics of slot liners for low voltage motors under high-frequency voltage stress , 2001, 2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225).

[6]  Tuomo Lindh,et al.  Selection of optimal frequency band for motor cable communication , 2009, 2009 13th European Conference on Power Electronics and Applications.

[7]  M.K.W. Stranges,et al.  New specs for ASD motors , 2007, IEEE Industry Applications Magazine.

[8]  Ville Särkimäki.  Radio Frequency Measurement Method for Detecting Bearing Currents in Induction Motors , 2009 .

[9]  Q. Su,et al.  New techniques for on-line partial discharge measurements , 2001, Proceedings. IEEE International Multi Topic Conference, 2001. IEEE INMIC 2001. Technology for the 21st Century..

[10]  Wan Jianru,et al.  Voltage distribution in stator windings of the motor driven by PWM inverter , 2002, Proceedings. International Conference on Power System Technology.

[11]  S. Lelaidier,et al.  Experience with UHF partial discharge measurements , 2002, Proceedings of 2002 IEEE 14th International Conference on Dielectric Liquids. ICDL 2002 (Cat. No.02CH37319).

[12]  A. Boscolo,et al.  Evaluation of LV insulating systems in inverter fed electric motors by means of partial discharges , 2005, 2005 5th IEEE International Symposium on Diagnostics for Electric Machines, Power Electronics and Drives.

[13]  G.C. Stone,et al.  Electrical insulation for rotating machines-design, evaluation, aging, testing, and repair - Book Review , 2004, IEEE Electrical Insulation Magazine.

[14]  A. Cavallini,et al.  A technique for defect investigation in pulse-controlled motors through partial discharge measurements , 2004, Conference Record of the 2004 IEEE International Symposium on Electrical Insulation.

[15]  Don-Ha Hwang,et al.  Analysis of voltage distribution in stator winding of IGBT PWM inverter-fed induction motors , 2005, Proceedings of the IEEE International Symposium on Industrial Electronics, 2005. ISIE 2005..

[16]  G. Stone,et al.  Electrical Insulation for Rotating Machines , 2003 .

[17]  Antti Kosonen,et al.  Power line communication in motor cables of variable-speed electric drives − analysis and , 2008 .

[18]  M.K.W. Stranges,et al.  IEC 60034-18-41: a new draft technical specification for qualification and acceptance tests of inverter duty motor insulation , 2005, Record of Conference Papers Industry Applications Society 52nd Annual Petroleum and Chemical Industry Conference.