Model Tests of Electrical Compensation Method for the New Calculable Cross-Capacitor at NIM
Model Tests of Electrical Compensation Method for the New Calculable Cross-Capacitor at NIM
复制标题
新型可计算交叉电容器电补偿方法在NIM的模型试验
DOI：
10.1109/tim.2013.2239014
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发表时间：
2013-06-01
影响因子：
5.6
通讯作者：
Yang, Yan
中科院分区：
文献类型：
--
作者：
Huang, Lu;Small, G. W.;Yang, Yan
在具有保护电极的交叉电容器中，等效电长度对主电极横截面的任何变化都很敏感，除非采取措施对此进行补偿。该问题尤其在可移动保护电极的情况下出现，该可移动保护电极通常装配有这样的几何形状的喷嘴，以补偿主电极从一个保护位置到另一位置的几何形状的变化。在新的国家计量研究院交叉电容器中，研究了一种替代方法，其中将一小部分测量电压施加到保护电极对面的隔离电极上。结果表明，这种改进的主动补偿电极的性能与等效的几何补偿物镜转换器一样好，甚至更好。
In a cross-capacitor with guard electrodes, the equivalent electrical length is sensitive to any variation in the cross section of the main electrodes unless measures are taken to compensate for this. The problem arises particularly in the case of a movable guard electrode, which is conventionally fitted with a nosepiece of such geometry as to compensate for variations in the geometry of the main electrodes from one guard position to another. In the new National Institute of Metrology cross-capacitor, an alternative approach, in which a fraction of the measuring voltage is applied to an isolated electrode in the face of the guard electrode, has been investigated. Results indicate that this modified active compensatory electrode performs as well as or better than an equivalent geometrical compensating nosepiece.