Research on contact electrical life model based on action parameters and electromagnetic relay reliability prediction

Recent advancements have focused on extending the life expectancy and enhancing the reliability of electromagnetic relays. However, the existing electrical life models are specifically designed for certain relay types, limiting their applicability across models with similar structures and thus restricting their universality. This study proposes a new model, the equilibrium forc e-type electromagnetic relay electrical life model, which incorporates contact breaking speed as a critical input parameter, allowing it to theoretically adapt to various types of equilibrium force-type electromagnetic relays. The model development begins with an electrical life test to measure parameters such as contact breaking speed, number of electrical lif etimes, single arcing charge, and cumulative arcing charge. These parameters serve to establish a contact electrical life model. The study further involves generating batch virtual samples based on the initial distribution of product parameters, facilitati ng the input and output modeling through a virtual prototype. The integration of the virtual sample data with the contact electrical life model permits the estimation of product reliability. This research, by focusing on batches of different types of equilibrium force-type electromagnetic relays with identical structures, establishes and validates the model's efficacy within a specified stress range, thereby contributing to the broader application and understanding of relay reliability modeling.