Lifetime consumption and degradation analysis of the winding insulation of electrical machines
Lifetime consumption and degradation analysis of the winding insulation of electrical machines
复制标题
电机绕组绝缘的寿命消耗和退化分析
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
C. Gerada
中科院分区：
文献类型：
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作者：
Claudio Sciascera;M. Galea;P. Giangrande;C. Gerada
在本文中，提出了一种新的多应力模型，估计相对于其占空比的绕组绝缘的寿命，并进行了研究。通过充分实施该模型，不仅可以根据其性能要求设计电机，还可以考虑相关的可靠性和寿命方面。由于热应力和热机械应力被认为是主要的老化因素，该模型特别适合于低电压，低占空比的机器。模型参数的确定是基于加速热机械老化试验的结果，其程序是彻底报告的文件。加速老化试验的结果表明，即使对于小尺寸、随机缠绕的绕组，在快速升温下，热机械老化的效果也是显著的。
In this paper, a novel multi-stress model which estimates the lifetime of the winding insulation relative to its duty cycle is proposed and investigated. With an adequate implementation of this model, then an electrical machine can be designed not only in terms of its performance requirements, but also considering the associated reliability and lifetime aspects. Since thermal and thermo-mechanical stresses are considered as the main ageing factors, the model is particularly suited for low voltage, low duty cycle machines. The determination of the model parameters is based on the results of accelerated thermo-mechanical ageing tests, whose procedure is thoroughly reported in the paper. The results of the accelerated ageing tests show that the effect of thermo-mechanical ageing is significant even for small size, random wound windings under fast temperature rise.