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| The Analyzing Method of Limit Vibration Acceleration for the Electromagnetic Relays |
| Ren Wanbin1, Chen Yinghua1, Kang Yunzhi1, Wang Lizhong2, Cui Li2 |
| 1. Harbin Institute of Technology Harbin 150001 China 2. Guilin Aerospace Electronics Ltd Co. Guilin 541002 China |
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Abstract The spring sets connected with armature component in the electromagnetic relay, is the typical rigid-flexible coupling structure. It also could be taken as the vulnerable part when the relay working in the mechanical environment. The vibration characteristics mathematical model of the relay is built by using finite element method, thus the analyzing method of limit vibration acceleration are presented completely by numerically solving the free vibration equation and forced vibration equation. The comparisons between the example calculation results and the displacement responses of spring sets which are recorded by using high speed camera are investigated. Thus the validity and the accuracy of the analyzing method are verified. And the relationship between the excited frequency and the limit vibration acceleration are obtained. Finally, the contact resistance is calculated through the obtained displacement responses of contacts and compared with the test results too. The analysis method and conclusions are valuable in solving the electromagnetic relay contact failure caused by mechanical vibration.
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Received: 20 February 2010
Published: 07 March 2014
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2011, Vol. 26 
