Transactions of China Electrotechnical Society  2018, Vol. 33 Issue (11): 2448-2455    DOI: 10.19595/j.cnki.1000-6753.tces.170700
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Influence of Contact Plate Structure on Magnetic Field Strength of a New Type of Cup-Shaped Axial Magnetic Field Vacuum Interrupter with Iron Core
Dong Huajun1,2, Si Mingyue1, Guo Yingjie1,2, Li Chunxiao1, Guo Fangzhun1
1. School of Mechanical Engineering Dalian Jiaotong University Dalian 116028 China;
2. State Grid Tianjin Pinggao Intelligent Electirc Co. Ltd Tianjin 300300 China

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Abstract  

Design of the contacts structure in the vacuum interrupter has an important influence on their internal electromagnetic field distribution. In order to do researches on the influence of contact plates structure on the electromagnetic field distribution, a new type of cup-shaped axial magnetic field (AMF) vacuum interrupter with iron core is used. In this study, Ansoft Maxwell software is adopted to simulate the electromagnetic field characteristics in the new vacuum interrupter. Influences of slot length, the slot deflection angle, the diameter of the center hole of contact plates, and the depth of the hole on the magnetic field distribution are got by utilizing the software . Besides, Magnetic induction intensity distribution at the time of peak current and over zero current are obtained. From the results we can see: The slot length, deflection angle and the center process aperture of contact plate have much influence on the magnetic field distribution while the aperture depth has little influence on the magnetic field distribution. The length of the slot and the increase of the center process aperture can reduce the magnetic induction intensity distribution. The increase of the slot deflection angle of the contact plate will increase the current intensity at the time of current peak and the current zero crossing, and the optimal angle is 25°. The contact plate slot and center open hole can reduce the residual magnetic field strength when the current is zero.

Key wordsVacuum interrupter      contact plate geometry      electromagnetic field distribution      magnetic induction     
Received: 24 May 2017      Published: 13 June 2018
PACS: TM561  
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Dong Huajun
Si Mingyue
Yingjie
Li Chunxiao
Guo Fangzhun
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Dong Huajun,Si Mingyue,Yingjie等. Influence of Contact Plate Structure on Magnetic Field Strength of a New Type of Cup-Shaped Axial Magnetic Field Vacuum Interrupter with Iron Core[J]. Transactions of China Electrotechnical Society, 2018, 33(11): 2448-2455.
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