Electrical converter-cable-machine systems, such as those in renewable source interfaces and transport drives, are operated with increasingly fast and high-performance converters. Their effects on the stator insulation and, in particular, on the turn insulation, need be understood in detail. A dynamic/FEM model is used to simulate the maximum voltages stressing the turn-to-turn and phase-to-ground insulation. The results show the role of rise time in the generation of overshoots and uneven voltage distribution. For machine to be fed with wide-bandgap converters, the limitations of PD testing using conventional surge generators are highlighted. Besides, the limits of the rise time definition and its role in the IEC60034-18-41/42 standards are discussed with reference to non-ideal waveforms acquired from a SiC bipolar converter.
Rumi A., Marinelli J.G., Pastura M., Barater D., Cavallini A. (2021). Insights into the definition of converter surge rise time and its influence on turn/turn electrical stress. Institute of Electrical and Electronics Engineers Inc. [10.1109/WEMDCD51469.2021.9425648].
Insights into the definition of converter surge rise time and its influence on turn/turn electrical stress
Rumi A.Primo
;Marinelli J. G.;Pastura M.;Cavallini A.
2021
Abstract
Electrical converter-cable-machine systems, such as those in renewable source interfaces and transport drives, are operated with increasingly fast and high-performance converters. Their effects on the stator insulation and, in particular, on the turn insulation, need be understood in detail. A dynamic/FEM model is used to simulate the maximum voltages stressing the turn-to-turn and phase-to-ground insulation. The results show the role of rise time in the generation of overshoots and uneven voltage distribution. For machine to be fed with wide-bandgap converters, the limitations of PD testing using conventional surge generators are highlighted. Besides, the limits of the rise time definition and its role in the IEC60034-18-41/42 standards are discussed with reference to non-ideal waveforms acquired from a SiC bipolar converter.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
