动车组牵引电机定子绝缘故障问题分析及解决措施
那春龙彭慧王玉龙
Analysis and Countermeasures for EMU Traction Motor Stator Insulation Faults
NA ChunlongPENG HuiWANG Yulong
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作者信息:中车株洲电机有限公司， 412001， 株洲
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Affiliation:CRRC Zhuzhou Electric Co., Ltd., 412001, Zhuzhou,China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.02.044
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中图分类号/CLCN:TM305-2：U269-6
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栏目/Col:应用技术
摘要:
［目的］为了保证动车组牵引电机定子绝缘的可靠性，在定子制作或检修过程中，需采用对地绝缘耐压、相间耐压与匝间绝缘耐压等试验项目对定子对地绝缘、相间绝缘与匝间绝缘缺陷进行筛选。因此，需对牵引电机的定子绝缘故障问题进行分析，并提出相应的解决措施。［方法］介绍了对地绝缘击穿故障、相间短路故障、匝间耐压衰减波形不重合故障的故障特征及故障原因，并分析了相应改进措施及故障定子修复方法。［结果及结论］牵引电机定子修复后，顺利通过了对地绝缘耐压、相间耐压与匝间绝缘耐压等试验项目的筛选。试验结果表明：所分析的故障原因可以准确诊断定子绝缘故障问题；所制定的改进措施，可以解决定子绝缘故障问题。
Abstracts:
［Objective］ To ensure the reliability of the stator insulation in EMU (electric multiple unit) traction motors during stator manufacturing or maintenance, it is necessary to conduct tests such as ground insulation withstand voltage, interphase withstand voltage, and coil-to-coil insulation withstand voltage to screen for defects of stator-to-ground insulation, interphase insulation, and coil-to-coil insulation. Therefore, an analysis of stator insulation faults in traction motors is required, and corresponding countermeasures are proposed. ［Method］ The fault characteristics and causes of ground insulation breakdown, interphase short circuit, and non-coinciding waveform attenuation in coil-to-coil insulation are introduced. Corresponding improvement measures and stator repair methods for these faults are analyzed. ［Result & Conclusion］ After repair, the stator of traction motor successfully passes the screening tests for ground insulation withstand voltage, interphase withstand voltage, and coil-to-coil insulation withstand voltage, and the test results demonstrate that the analyzed fault causes can accurately diagnose stator insulation faults, and the formulated improvement measures effectively resolve stator insulation issues.
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