Electromagnetic coils are a key component in a variety of systems and are widely used in many industries. Because their insulation usually fails suddenly and can have catastrophic effects, degradation monitoring of coil insulation systems plays a vital role in avoiding unexpected machine shutdown. The existing insulation degradation monitoring methods are based on assessing the change of coil high-frequency electrical parameter response, whereas the effects of the insulation failure mechanisms are not considered, which leads to inconsistency between experimental results. Therefore, this paper investigates degradation monitoring of coil insulation systems under thermal loading conditions from a creep point of view. Inter-turn insulation creep deformation is identified as a quantitative index to manifest insulation degradation changes at the micro level. A method is developed to map coil high-frequency electrical monitoring parameters to inter-turn insulation creep deformation in order to bridge the gap between the micro-level and macro-level changes during the incipient insulation degradation process. Thermally accelerated tests are performed to validate the developed method. The mapping method helps to determine the physical meaning of coil electrical monitoring parameters and presents opportunities for predictive maintenance of machines that incorporate electromagnetic coils.

中文翻译：

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从蠕变的角度来看，热负荷条件下低压电磁线圈中使用的绝缘系统的性能下降监测。

电磁线圈是各种系统中的关键组件，并广泛用于许多行业。由于它们的绝缘通常突然失效并可能带来灾难性的影响，因此对线圈绝缘系统的降级监控在避免机器意外停机方面起着至关重要的作用。现有的绝缘劣化监测方法是基于评估线圈高频电参数响应的变化，而没有考虑绝缘破坏机理的影响，这导致实验结果之间的不一致。因此，本文从蠕变的角度研究了在热负荷条件下线圈绝缘系统的退化监测。匝间绝缘蠕变变形被确定为定量指标，以表明微观水平上绝缘退化的变化。开发了一种方法来映射线圈高频电监测参数到匝间绝缘蠕变变形，以弥合初期绝缘退化过程中微观和宏观变化之间的差距。进行热加速测试以验证开发的方法。该映射方法有助于确定线圈电监控参数的物理含义，并为包含电磁线圈的机器的预测维护提供了机会。开发了一种方法来映射线圈高频电监测参数到匝间绝缘蠕变变形，以弥合初期绝缘退化过程中微观和宏观变化之间的差距。进行热加速测试以验证开发的方法。该映射方法有助于确定线圈电监控参数的物理含义，并为包含电磁线圈的机器的预测维护提供了机会。开发了一种方法来映射线圈高频电监测参数到匝间绝缘蠕变变形，以弥合初期绝缘退化过程中微观和宏观变化之间的差距。进行热加速测试以验证开发的方法。该映射方法有助于确定线圈电监控参数的物理含义，并为包含电磁线圈的机器的预测维护提供了机会。