Impact of impulse voltage frequency on the partial discharge characteristic of electric vehicles motor insulation. (October 2020)

• Record Type: Journal Article
• Authors: Akram, Shakeel; Wang, Peng; Nazir, M. Tariq; Zhou, Kai; Bhutta, M. Shoaib; Hussain, Haider
• Is Part Of: Engineering failure analysis. Volume 116(2020)
• Publication Date: 2020-10
• Subjects: Inverter-fed motor -- Insulation system -- Partial discharge -- Impulsive voltage -- Repetitive impulsive voltage; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2020.104767
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: PD detection using impulse voltage waveforms for electric vehicle motors insulation. Impact of impulse voltage frequency on partial discharge inception voltage (PDIV) Statistical analysis of PD signal on delay time and PD magnitude. Influence of temperature on PD magnitude and delay time on Pharrell bar model. Abstract: The urgent need for electric vehicles is the leading research to safer operation of electric motors on high frequency impulsive voltages. For low voltage electric vehicles partial discharge (PD) inception voltage tests under impulse voltage waveforms are desired. However, measuring PD using repetitive impulse waveforms is critical in selecting generators with appropriate parameters to increase PD detection sensitivity. Here, we report on PD characteristics for such kind of voltage waveforms, demonstrated with the high frequency and thermal impact on different types of motor insulation models. The increasing frequency of impulsive voltages tends to result in PD activities with low magnitude and short delay times. In this case, some PD pulses are missed because the PD and disturbance pulses produced by power electronic devices will likely overlap. Therefore, these parameters are carefully considered to evaluate the insulation performance of EV motors.