Title :
Influence of different square voltage waveforms on the partial discharges behaviour during tests on twisted pair specimens
Author :
Coletti, G. ; Guastavino, F. ; Torello, E.
Author_Institution :
Electr. Eng. Dept., Univ. of Genova, Italy
Abstract :
The present work is part of a research program aimed at studying the long-term performance of electric motor insulation systems which are part of modern drives (equipped with fast inverters/converters). In particular the degradation effects of partial discharges (PD) were here experimentally studied. Different (purposely selected and generated) PWM-like waveform voltages have been applied to twisted pairs (polyimide-imide enamelled wires) specimens. The tests have been carried out at 100°C. The relevant PD output (patterns) has been recorded by means of a digital system and the times-to-breakdown of the specimens have been recorded. The various PD patterns appeared consistent with the recorded lifetimes and the planned study has produced both an innovative line of approach and interesting results.
Keywords :
insulated wires; insulation testing; life testing; machine insulation; motor drives; organic insulating materials; partial discharge measurement; polymers; pulse width modulation; 100 C; PD patterns; PWM-like waveform voltages; drives; electric motor insulation systems; inverters/converters; partial discharges; partial discharges behaviour; polyimide-imide enamelled wires; square voltage waveforms; twisted pair specimens; Degradation; Dielectrics and electrical insulation; Digital systems; Electric motors; Partial discharges; Pulse width modulation; Pulse width modulation inverters; Testing; Voltage; Wires;
Conference_Titel :
Electrical Insulation, 2002. Conference Record of the 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7337-5
DOI :
10.1109/ELINSL.2002.995875
