Abstract:

When the hermetically sealed electromagnetic relay (HSER) operates,it involves multiple physical processes such as mechanical,electrical,and magnetic processes.The traditional analysis methods based on static data tables are difficult to meet the efficiency and accuracy requirements of reliability analysis.The meshless node flexible body model is introduced as the core of the multi-body dynamics model to build a real-time interaction channel between transient mechanical torque,electromagnetic force,and position parameters.The implicit integration algorithms for nonlinear contact and collision problems in the rigid flexible coupling model and electromagnetic finite element methods based on Maxwell’s equations are introduced.A multi-body dynamics electromagnetic finite element bidirectional interaction coupling calculation model is established to achieve real-time coupling calculation analysis of HSER mechanical electrical magnetic dynamic characteristics.An HSER electrical parameter,time parameter and force parameter testing system is built.The test data of the prototype is compared with the analysis and calculation results.The average error of the end attractive dynamic pressure of contact is 2.21%,which verifies the effectiveness of the method.

Key words: hermetically sealed electromagnetic relay (HSER), multi-physical fields coupling, bidirectional interaction coupling, meshless node flexible body