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首页> 外文会议>Electrical Insulation Conference and Electrical Manufacturing Expo, 2005. Proceedings >Degradation of turn insulation subjected to fast repetitive voltage pulses
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Degradation of turn insulation subjected to fast repetitive voltage pulses

机译：快速重复的电压脉冲会使绝缘层退化

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摘要

The paper describes the failure mechanisms of medium voltage inter-turn insulation as a consequence of space charge formation and partial discharge (PD) activity. In order to investigate the failure behavior, models of turn insulation are prepared with magnetic wires having polyimide and nano-filled coating. The ageing of such model bar samples is done under sinusoidal (60 Hz), fast repetitive unipolar voltage pulses and high frequency waveforms. The ageing tests are performed in the presence of PD activity. To establish the residual strength of bar samples, DC breakdown voltages are determined before and after the ageing. Experimental results reveal that the evaluation and analysis of such model study will be helpful for both motor and wire manufacturers to minimize ageing and to improve motor performance under medium voltage inverter-fed drive applications.
机译：本文介绍了中压互光性的故障机制，作为空间电荷形成和局部放电（PD）活性。为了研究故障行为，用具有聚酰亚胺和纳米填充涂层的磁线制备转型绝缘的模型。这种模型条样品的老化在正弦（60Hz）下进行，快速重复的单极电压脉冲和高频波形进行。老化试验在PD活性存在下进行。为了建立条形样品的残余强度，在老化之前和之后确定直流击穿电压。实验结果表明，这种模型研究的评估和分析对电机和电线厂家有助于最小化老化，并在中电压逆变器馈电应用下提高电机性能。

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