100A AC-DC current measurements to within ±25ppm from 3 Hz to 1kHz

被引：2
|
作者：
Clarke, KK
机构：
[1] Clarke-Hess Communication Research Corporation, 300 Riverside Drive, New York
来源：
IEE PROCEEDINGS-SCIENCE MEASUREMENT AND TECHNOLOGY | 2000年 / 147卷 / 04期
关键词：
Software-controlled digitizing voltmeters - Thermal convertors;
D O I：
10.1049/ip-smt:20000527
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The paper uses a set of computer controlled commercial equipment in conjunction with a software-controlled digitising voltmeter to produce accurate 100A current measurements at +/-DC and in the frequency range from 0.1Hz to 1kHz. Overall uncertainties in the region of +/-20ppm appear possible. The paper concentrates on 100A results; however, the concepts work down to 10A and up to at least 1kA. The resultant system is nearly immune to the thermal problems and warm-up times that plague shunts and thermal convertors, particularly for currents greater than 20A. A method to separate the transfer functions of the amplifier and the transducer is proposed. Experimental verification of the method and of the system performance is provided.
引用
收藏
页码：186 / 189
页数：4
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