Abstract:

The acceptability rate of batch products of the balanced force hermetically sealed electromagnetic relay (HSER) in the performance testing after assembly is relatively low,and a lot of adjustment is needed to improve the acceptability rate of products.Four key input parameters are selected through the sensitivity analysis focusing on pick-up voltage and release voltage,which are all related to the permanent magnet.Based on the Optimal Latin Hypercube Sampling method,the sample points of input parameters are selected to establish the finite element model (FEM) of electromagnetic system.The Kriging approximate model is built according to the data of static characteristics.To reduce the error,the Kriging model is modified by using the variation function,and the fast calculation of pick-up voltage and release voltage is realized.By comparing with the finite element model,the accuracy of the fast calculation model is verified.Based on this fast calculation model,the parameter design of adjustment-free rate and tolerance design are carried out.The improvement effect of adjustment-free rate is verified by the actual prototype production.

Key words: balanced force herwetically sealed electromagnetic relay, adjustment-free rate, Kriging approximate model, variation function