A new trimming approach for shunt resistors used in metering applications

Siti Nabilah Misti, M. Birkett, David Bell, R. Penlington
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引用次数: 3

Abstract

A growing number of smart energy meters and electric charging stations have sparked a demand for a high precision, low value shunt resistors to measure the flow of electrical current. This paper investigates the possibility of trimming 100 micro ohms Manganin shunt resistors with tolerance of 5 percent to improve their accuracy and performance for use in smart energy meters. In theory, reducing the standard 5 percent tolerance of the shunt resistors can be achieved by removing controlled amounts of the resistive material. In this experiment, theoretical analysis is carried out to determine the maximum amount of resistive material that can be removed from Manganin shunt resistor to reduce its standard tolerance of 5 percent. Two alternative designs are then used to trim the material from the Manganin strip using machining techniques. Implications of the experimental results to the flow of electrical current and temperature rise in the shunt resistors are discussed. Results from the initial trimming trials show that the standard tolerance of 5 percent can be reduced to less than 1 percent.
一种用于计量应用的并联电阻器的新修整方法
越来越多的智能电表和充电站引发了对高精度、低值分流电阻器的需求,以测量电流的流动。本文研究了微调100微欧姆锰锰并联电阻的可能性,公差为5%,以提高其在智能电能表中的精度和性能。理论上,减少5%的标准容差的分流电阻可以实现通过去除控制量的电阻材料。在本实验中,进行了理论分析,以确定可以从Manganin并联电阻器中去除的最大电阻材料量,以减少其5%的标准公差。然后使用两种可供选择的设计来使用机械加工技术从锰带中修剪材料。讨论了实验结果对并联电阻器内电流流动和温升的影响。初步修边试验结果表明,5%的标准公差可以减小到1%以下。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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