Simulation of Contact Resistance for Flexible Spring Components Within Electromagnetic Relays

doi:10.16628/j.cnki.2095-8188.2021.09.009

Abstract

Abstract:

Contact resistance is an important parameter for electrical contact reliability of flexible spring components widely used in electromagnetic relays.In this paper,the coupled mechanical-electrical field simulation of the typical bridge-type structure is conducted by the commercial software COMSOL Multiphysics to obtain the distributions of the contact stress and electrical current lines.Thus,the variations in contact resistance as a function of contact displacement is determined.The simulation results agree well with the experimental results.Finally,the effects of the curvature radius of the movable contact and the flexible spring length on the contact force and contact resistance are further analyzed.The conclusions could be directly applied to the optimal design of the spring component in the electromagnetic relay.

Key words: eectromagnetic relay, spring component, finite element simulation, contact force, contact resistance

CLC Number:

TM581.3

ZHAO Zien, ZHANG Chao, REN Wanbin. Simulation of Contact Resistance for Flexible Spring Components Within Electromagnetic Relays[J]. LOW VOLTAGE APPARATUS, 2021, 0(9): 56-61.

Figures/Tables 12

References 10

[1]	赵正元. 铁路信号继电器触点接触电阻变化的影响因素分析[J]. 铁路通信信号工程技术, 2020, 17(8):13-18,23.
[2]	HOLM R. Electric contacts:Theory and application[M]. New York,NY,USA:Springer-Verlag, 1967.
[3]	SLADE P G. Electrical contacts principles and applications[M]. 2ed.New York,NY,USA:CRC, 2013.
[4]	周蠡, 鲁铁成, 张博, 余光凯, 万家伟. 基于三维分形接触电阻模型的粗糙表面多物理场耦合分析[J]. 电工技术学报, 2015, 30(14):226-232.
[5]	RIBA J R, MANCINI A G, ABOMAILEK C, et al. A 3D-FEM-based model to predict the electrical constriction resistance of compressed contacts[J]. Measurement, 2018, 114(1):44-50. doi: 10.1016/j.measurement.2017.09.003
[6]	熊军, 何俊佳, 臧春艳. 电磁继电器触簧系统触头弹跳的多因素分析[J]. 低压电器, 2009(1):7-10.
[7]	任万滨, 韦健民, 金建炳, 等. 电磁继电器内推杆式触簧系统动作过程的模拟试验研究[J]. 电器与能效管理技术, 2015(20):1-5,15.
[8]	ZHANG C, REN W B, WANG T Y. Modeling and experimental verification of contact sliding behavior for flexible spring components within electromechanical relays[J]. IEEE Transactions on Components,Packaging,and Manufacturing Technology, 2019, 9(10):2046-2054. doi: 10.1109/TCPMT.5503870
[9]	陈乐平, 周全. 铍铜合金的研究进展及应用[J]. 热加工工艺, 2009, 38(22):14-18.
[10]	POPOV V L. Contact mechanics and friction:Physical principles and applications[M]. NY,USA:Springer, 2010.

材料	电导率/ (S·m^-1)	密度/ (kg·m^-3)	弹性模量/GPa	泊松比
铍铜合金	2.49×10⁷	8 960	26.8	0.35
银氧化锡	4.17×10⁷	9 800	79.0	0.37