The aging behavior of three kinds of insulating materails for electrical machine windings supplied by pulse width modulation (PWM) inverters in the presence and absence of partial discharges were investigated. Life tests were carried out on twisted pairs subjected to sinusoidal voltage, as well as unipolar and bipolar square pulses. The aging acceleration under high frequency pulses were found to occur in the absence of partial discharges. The failure times were proportional to the ratio of test to supply frequency. The beakdown was much more accelerated under partial discharge regime and the failure times were observed to follow a superlinear law as function of frequency.
Fabiani D., Montanari G.C., Contin A. (2001). Aging acceleration of insulating materials for electrical machine windings supplied by PWM in the presence and in the absence of partial discharges [10.1109/ICSD.2001.955625].
Aging acceleration of insulating materials for electrical machine windings supplied by PWM in the presence and in the absence of partial discharges
Fabiani D.;Montanari G. C.;
2001
Abstract
The aging behavior of three kinds of insulating materails for electrical machine windings supplied by pulse width modulation (PWM) inverters in the presence and absence of partial discharges were investigated. Life tests were carried out on twisted pairs subjected to sinusoidal voltage, as well as unipolar and bipolar square pulses. The aging acceleration under high frequency pulses were found to occur in the absence of partial discharges. The failure times were proportional to the ratio of test to supply frequency. The beakdown was much more accelerated under partial discharge regime and the failure times were observed to follow a superlinear law as function of frequency.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
