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| Precision Measuring Technique for Contact Resistance of Contact Materials |
| Ren Wanbin1, Wu Jian2, Chen Yu1, Cao Sheng1, Cui Li3, Zhai Guofu1 |
1. Harbin Institute of Technology Harbin 150001 China;
2. Beijing TIME High Technology Ltd. Beijing 100085 China;
3. G&A Technology Co. Ltd Guilin 541002 China |
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Abstract Contact material is very critical for the reliability of electrical engineering and electronic engineering. A new precision measuring system and relevant testing method are presented by introducing intermittent chopping for excited current, conditioning for low noise low drift weak voltage drop signal and averaging filtering algorithm in moving window comprehensively. The error of test facility is determined by using Level 0.01 standard resistors and Level M22 standard weights accurately. The hysteretic characteristics between contact resistance and contact force of AgCdO composite contact material with flat surface are measured with different excited currents. The results showed that the effect of contact force and excited current on contact resistance.
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Received: 10 May 2013
Published: 16 June 2014
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2014, Vol. 29 
