Partial Discharge Characteristics of Electrical Aircraft Machine Winding after Thermal Aging

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE) Pub Date : 2022-09-25 DOI:10.1109/ICHVE53725.2022.9961670

Yuming Wang, Jianyu Pan, Haibo Tang, Yushuang He, Qinglin Wang

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Abstract

Electric machines for civil aircraft must have high reliability. However, the harsh operating environment will challenge the machines' insulation system. For electric machines in aircraft, thermal aging is the main reason for insulation deterioration and result in the failure of the electrical machine. Partial discharge (PD) is an essential indicator in evaluating the insulation damage. This paper aims to clarify the PD characteristics of the machine winding before and after thermal aging for aircrafts. It firstly established a thermal aging platform and used a PD measurement circuit to study the behavior of the PD inception voltage (PDIV), phase-resolved PD (PRPD), and PD magnitude before and after thermal aging. The insulation capacitance (IC) of machine windings with different aging stages is also tested and compared with PD characteristics. Results show that thermal aging will decrease the PDIV of winding insulation and PD magnitude increases exponentially after thermal aging.

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飞机电机绕组热老化后的局部放电特性

民用飞机用电机必须具有高可靠性。然而，恶劣的操作环境将挑战机器的绝缘系统。对于飞机上的电机来说，热老化是导致电机绝缘劣化而导致电机故障的主要原因。局部放电是评价绝缘损伤的重要指标。本文旨在阐明飞机热老化前后机器绕组的局部放电特性。首先建立热老化平台，利用局部放电测量电路，研究热老化前后局部放电起始电压(PDIV)、相位分辨局部放电(PRPD)和局部放电幅值的变化规律。测试了不同老化阶段机器绕组的绝缘电容(IC)，并与局部放电特性进行了比较。结果表明，热老化会降低绕组绝缘的PDIV，且PD值呈指数级增长。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2022 IEEE International Conference on High Voltage Engineering and Applications (ICHVE)

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