精密电阻器热阻分析及测定方法研究

doi:10.3969/j.issn.1000-1158.2015.03.16

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摘要提出了一种锰铜丝精密电阻的热阻测定新方法,推导出适用于锰铜丝精密电阻的热阻计算公式。通过建立电阻温度特性及负载效应的测试平台,解释了测试得到的锰铜丝零负载效应点现象。实验得到的零负载效应温度点重复性测试结果均达到10-8量级。将已知零负载效应点的锰铜丝精密电阻作为参考电阻,可以对其他电阻进行额定功率下负载效应的准确测试。

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	吴键
	李正坤
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关键词 ：计量学, 热阻计算, 温度特性, 负载效应, 锰铜丝电阻, 参考电阻

Abstract：A new method of measuring thermal resistance for manganese-copper wire precision resistance is developed. The thermal resistance calculation formula which is suitable for manganese-copper wire precision resistance is derived. A test system for temperature characteristic of resistance and load effect of resistance is built. The phenomenon of zero load effect point is explained. The repeatability of measuring results for of zero load effect point got in experiment is about several parts in 10-8. Finally, the load effect testing method for other resistors with rated power is introduced, in which the reference resistor is the manganese-copper wire precision resistor with measured zero effect point.

Key words： Metrology Thermal resistance calculation Temperature characteristic Load effect Manganese-copper wire resistor Reference resistor

基金资助:国家重大科学仪器设备开发专项（2011YQ090004）

作者简介: 吴键（1989-）,男,浙江温岭人,中国计量学院硕士研究生,研究方向为检测技术与自动化装置。790783246@qq.com

引用本文:

吴键,李正坤,陈乐,张钟华. 精密电阻器热阻分析及测定方法研究[J]. 计量学报, 2015, 36(3): 299-303.
WU Jian,LI Zheng-kun,CHEN Le,ZHANG Zhong-hua. Research on Analysis and Measurement Method for Thermal Resistance of Precision Resistor. Acta Metrologica Sinica, 2015, 36(3): 299-303.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2015.03.16 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2015/V36/I3/299