Title :
The influence of PWM voltage waveforms on induction motor insulation systems: Perspectives for the end user
Author :
Cavallini, A. ; Montanari, G.C. ; Fabiani, D. ; Tozzi, M.
Author_Institution :
Dept. of Electr. Eng. (DIE), Univ. of Bologna, Bologna, Italy
Abstract :
Inverter-fed motors may experience premature failures due to the abnormal (if compared with 50/60 Hz sinusoidal voltage) stress profiles that voltage impulses induce in the insulation system. This paper will briefly recall the reasons for these failures, focusing on the key role of partial discharges in wire-wound insulation systems. Furthermore, it will provide a short review of the actions taken by the International Electrotechnical Commission (IEC) to minimize the impact of such failures. Eventually, some solutions for testing online wire-wound motors, thus preventing premature failures to occur, will be presented.
Keywords :
PWM invertors; failure analysis; induction motors; insulation; partial discharges; waveform analysis; International Electrotechnical Commission; PWM voltage waveforms; abnormal stress profiles; end user; induction motor insulation systems; inverter fed motors; partial discharges; premature failures; voltage impulses; wire-wound insulation systems; IEC; Insulation; Inverters; Noise; Partial discharges; Qualifications; Stress; Partial discharges; converter; induction motor; reliability;
Conference_Titel :
Diagnostics for Electric Machines, Power Electronics & Drives (SDEMPED), 2011 IEEE International Symposium on
Conference_Location :
Bologna
Print_ISBN :
978-1-4244-9301-2
Electronic_ISBN :
978-1-4244-9302-9
DOI :
10.1109/DEMPED.2011.6063638
