Analysis of the Contact Bounce Based on Dynamic Contact Pressure
Li Junfeng1,2, Su Xiuping1, Zheng Xinfang2, Zhao Jingying1
1.Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 300130 China; 2.Department of Mechanical and Electrical Engineering Handan College Handan 056005 China
Abstract By using polyvinylidene fluoride (PVDF) piezoelectric film as the sensitive element under an trial product of CJ20-25 AC contactor,the dynamic contact pressure signal of the two contacts on the bridge of one main contact are measured under the principle of elastic wave.The contact vibration and swing in the moving process are then recorded with high speed camera.The contacts contact pressure signal then undergoes noise reduction using wavelet toolbox.The relationship between the contact bounce and the break-connection of the contact and the closing phase angle are studied respectively.The results indicate that the dynamic contact pressure signal can reveal the reason for the change of the contact bounce and the break-connection signal,and 60° closing phase angle will lead to the worst overall performance.
Li Junfeng,Su Xiuping,Zheng Xinfang等. Analysis of the Contact Bounce Based on Dynamic Contact Pressure[J]. Transactions of China Electrotechnical Society, 2015, 30(9): 138-144.
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2015, Vol. 30 
