通过对变频电机用绝缘电磁线进行高频脉冲电老化试验，研究了绝缘电磁线的电老化寿命及其变化规律。采用电子能谱仪和显微镜对绝缘电磁线表面在电老化过程中的析出物进行了成分分析和形貌表征。结果表明：绝缘电磁线在施加一定电压条件下会出现局部放电，其寿命随施加电压的增加呈指数式衰减，在电老化过程中电磁线绝缘表面有白色析出物质，对试样表面析出物进行能谱分析发现C、O、Mg、Si、Ca增加较多，击穿点周围C、F、Cu元素含量大幅度增加。新试样表面平坦且没有杂质，而经过电老化后的电磁线试样表面团聚物堆积、凹凸不平。
The electrical ageing life and its change rule of electromagnetic wire insulation for inverter-fed motor were studied through high frequency pulse electrical ageing test. The composition and morphology of the precipitates appeared on the eletromagnetic wire insulation surface during electrical ageing were analyzed by electron spectroscopy and microscope. The results show that the partial discharge would appear when electromagnetic wire is applied certain voltage, and its life decreases exponentially with the increase of applied voltage. Some white precipitates are found on the electromagnetic wire insulation surface. It is found that the C, O, Mg, Si, and Ca element content in precipitates increase a lot through analyzing the energy spectra of samples, and the C, F, and Cu element content increase significantly around the breakdown point. The new sample has smooth surface and no impurities, and the surface of electrical ageing sample is uneven and accumulated with agglomerate.
参考文献
| [1] | 任文娥,于钦学,钟力生,何恩广.变频牵引电机线圈绝缘电老化规律的研究[J].西安交通大学学报,2012(12):74-77. |
| [2] | 任文娥,于钦学,钟力生,何恩广.Kapton CR防电晕薄膜热老化特性的研究[J].绝缘材料,2012(04):42-44. |
| [3] | 马志昆.变频电机用纳米复合绝缘薄膜老化性能的评估[J].绝缘材料,2009(06):51-53. |
| [4] | 李鸿岩,王峰,郭磊,刘斌,陈寿田.变频电机的匝间绝缘电老化机理[J].绝缘材料,2005(02):57-60. |
| [5] | 何恩广,周升,刘学忠,徐传骧,陈炳正.PWM变频电机绝缘技术的研究进展[J].绝缘材料,2002(04):18-25. |
| [6] | M. Kaufhold;K. Schafer;K. Bauer;A. Bethge;J. Risse .Interface phenomena in stator winding insulation - challenges in design, diagnosis, and service experience[J].IEEE Electrical Insulation Magazine,2002(2):27-36. |
| [7] | Hazim Faruk Bilgin;K. Nadir Kose;Gurkan Zenginobuz;Muammer Ermis;Erbil Nalcaci;Isik Cadirci;Hasan Kose .A unity-power-factor buck-type PWM rectifier for medium/high-power DC motor drive applications[J].IEEE Transactions on Industry Applications,2002(5):1412-1425. |
| [8] | Weijun Yin .Failure mechanism of winding insulations in inverter-fed motors[J].IEEE Electrical Insulation Magazine,1997(6):18-23. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%