Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives

Partial discharge (PD) is a prime cause of premature failure of inverter-fed motor winding insulation. With the emergence of fast-switching wide-bandgap silicon-carbide (SiC) power semiconductor devices, random-wound motors are more vulnerable to highly repetitive PDs due to the high-frequency steep...

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Autores principales:	Mohamed Diab, Wenzhi Zhou, Christopher Emersic, Xibo Yuan, Ian Cotton
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Inverter-fed motors magnet wire insulation motor overvoltage partial discharge (PD) silicon carbide (SiC) devices wide bandgap Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/7fa86e760b8440d1a26ab22ae3a616db
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spelling	oai:doaj.org-article:7fa86e760b8440d1a26ab22ae3a616db2021-12-02T00:00:28ZImpact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives2169-353610.1109/ACCESS.2021.3129266https://doaj.org/article/7fa86e760b8440d1a26ab22ae3a616db2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9620026/https://doaj.org/toc/2169-3536Partial discharge (PD) is a prime cause of premature failure of inverter-fed motor winding insulation. With the emergence of fast-switching wide-bandgap silicon-carbide (SiC) power semiconductor devices, random-wound motors are more vulnerable to highly repetitive PDs due to the high-frequency steep-fronted switching transitions that result in overvoltage oscillations at the motor terminals and non-uniform voltage distribution within the motor winding turns. This article investigates the impact of the applied PWM voltage waveforms on the PD behavior in SiC-based inverter-fed motors, including two-level, three-level, and quasi-three-level PWM waveforms. The electric field distribution inside insulation defects (air cavities) is analysed for the different PWM voltage waveforms to theoretically predict the number and phase of probable PD events within the fundamental cycle. An experimental PD measurement setup is used to validate the theoretical analysis by applying the PWM voltage waveforms, that are generated by SiC-based power converters, on a typical turn-to-turn motor winding insulation system created by a twisted pair of enamelled magnet wire. Phase-resolved PD patterns are generated to assess the PD behavior against the PWM characteristics of each voltage waveform and the associated overvoltage pattern when power cables are used to emulate the voltage reflections in cable-fed motor drives. Detailed experiment specifications are provided in this article involving PD measurement methods and PD data post-processing algorithms. The obtained results are assessed, and conclusions are drawn as a useful and timely reference that enhances the understanding of insulation PD process in SiC-based power electronics applications.Mohamed DiabWenzhi ZhouChristopher EmersicXibo YuanIan CottonIEEEarticleInverter-fed motorsmagnet wire insulationmotor overvoltagepartial discharge (PD)silicon carbide (SiC) deviceswide bandgapElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 156599-156612 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Inverter-fed motors magnet wire insulation motor overvoltage partial discharge (PD) silicon carbide (SiC) devices wide bandgap Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Inverter-fed motors magnet wire insulation motor overvoltage partial discharge (PD) silicon carbide (SiC) devices wide bandgap Electrical engineering. Electronics. Nuclear engineering TK1-9971 Mohamed Diab Wenzhi Zhou Christopher Emersic Xibo Yuan Ian Cotton Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives
description	Partial discharge (PD) is a prime cause of premature failure of inverter-fed motor winding insulation. With the emergence of fast-switching wide-bandgap silicon-carbide (SiC) power semiconductor devices, random-wound motors are more vulnerable to highly repetitive PDs due to the high-frequency steep-fronted switching transitions that result in overvoltage oscillations at the motor terminals and non-uniform voltage distribution within the motor winding turns. This article investigates the impact of the applied PWM voltage waveforms on the PD behavior in SiC-based inverter-fed motors, including two-level, three-level, and quasi-three-level PWM waveforms. The electric field distribution inside insulation defects (air cavities) is analysed for the different PWM voltage waveforms to theoretically predict the number and phase of probable PD events within the fundamental cycle. An experimental PD measurement setup is used to validate the theoretical analysis by applying the PWM voltage waveforms, that are generated by SiC-based power converters, on a typical turn-to-turn motor winding insulation system created by a twisted pair of enamelled magnet wire. Phase-resolved PD patterns are generated to assess the PD behavior against the PWM characteristics of each voltage waveform and the associated overvoltage pattern when power cables are used to emulate the voltage reflections in cable-fed motor drives. Detailed experiment specifications are provided in this article involving PD measurement methods and PD data post-processing algorithms. The obtained results are assessed, and conclusions are drawn as a useful and timely reference that enhances the understanding of insulation PD process in SiC-based power electronics applications.
format	article
author	Mohamed Diab Wenzhi Zhou Christopher Emersic Xibo Yuan Ian Cotton
author_facet	Mohamed Diab Wenzhi Zhou Christopher Emersic Xibo Yuan Ian Cotton
author_sort	Mohamed Diab
title	Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives
title_short	Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives
title_full	Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives
title_fullStr	Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives
title_full_unstemmed	Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives
title_sort	impact of pwm voltage waveforms on magnet wire insulation partial discharge in sic-based motor drives
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/7fa86e760b8440d1a26ab22ae3a616db
work_keys_str_mv	AT mohameddiab impactofpwmvoltagewaveformsonmagnetwireinsulationpartialdischargeinsicbasedmotordrives AT wenzhizhou impactofpwmvoltagewaveformsonmagnetwireinsulationpartialdischargeinsicbasedmotordrives AT christopheremersic impactofpwmvoltagewaveformsonmagnetwireinsulationpartialdischargeinsicbasedmotordrives AT xiboyuan impactofpwmvoltagewaveformsonmagnetwireinsulationpartialdischargeinsicbasedmotordrives AT iancotton impactofpwmvoltagewaveformsonmagnetwireinsulationpartialdischargeinsicbasedmotordrives
_version_	1718403994476347392

Impact of PWM Voltage Waveforms on Magnet Wire Insulation Partial Discharge in SiC-Based Motor Drives

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