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Storage PoF model of electromagnetic relays based on electrical contact theory

机译：基于电接触理论的电磁继电器存储PoF模型

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摘要

To predict the storage life (SL) of electromagnetic relays better, effectively guide life extension project and save maintenance costs, this paper proposes a Physics of Failure (PoF) model for assessing the SL based on Holm electrical contact theory.Firstly, considering the relationship between storage environment, processing technology, material and contact resistance, the shrinkage, interface and body resistance expressions are constructed. Then the PoF model is established regarding contact resistance to the initial value ratio as an input parameter. The dimensionless parameter in the model that reflects the diffusion rate of the corrosion film on contact surface is determined from the contact resistance data measured in the Accelerated Storage Degradation Test (ASDT). By using this model to calculate SL of the samples at different stress levels and comparing results with ASDT records, the accuracy of the model is verified. It proves that the proposed storage PoF model can predict the SL of electromagnetic relays effectively and provides a theoretical reference for rapid assessment of their storage state.
机译：为了更好地预测电磁继电器的存储寿命（SL），有效地指导寿命延长项目并节省维护成本，本文提出了一种基于Holm电接触理论的失效物理（PoF）模型来评估SL。在存储环境，加工技术，材料和接触电阻之间，构造了收缩率，界面和体电阻表达式。然后建立将接触电阻与初始值比作为输入参数的PoF模型。该模型中反映腐蚀膜在接触表面上的扩散速率的无量纲参数是根据加速存储降级测试（ASDT）中测得的接触电阻数据确定的。通过使用该模型计算不同应力水平下的样品的SL并将结果与​​ASDT记录进行比较，验证了模型的准确性。证明了所提出的存储PoF模型可以有效地预测电磁继电器的SL，并为快速评估其存储状态提供理论参考。

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