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Optical Engineering

Research on zero-sum magnetic field integral technology of optical current sensors
Author(s): Shen-wang Li; Wen-bin Yu; Guo-qing Zhang; Zhi-zhong Guo; Yan Shen
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Paper Abstract

An architecture based on the Faraday effect to minimize the crosstalk effect in optical current sensors (OCSs) is proposed. It was demonstrated that the magnetic field integral along a discrete loop can meet Ampere’s law under certain conditions, and the mathematical model of zero-sum points was given. Based on it, a zero-sum OCS (ZOCS) was proposed, which consists of several OCSs forming a symmetrical discrete loop. Ideally, the currents that flow outside the ZOCS do not contribute to the measurement of the currents inside it. The experimental results showed that the magnetic crosstalk-induced errors of ZOCS were less than 0.2%, and the influence of external current was reduced one order compared with conventional OCSs.

Paper Details

Date Published: 17 October 2013
PDF: 8 pages
Opt. Eng. 52(10) 104105 doi: 10.1117/1.OE.52.10.104105
Published in: Optical Engineering Volume 52, Issue 10
Show Author Affiliations
Shen-wang Li, Harbin Institute of Technology (China)
Wen-bin Yu, Harbin Institute of Technology (China)
Guo-qing Zhang, Harbin Institute of Technology (China)
Zhi-zhong Guo, Harbin Institute of Technology (China)
Yan Shen, Harbin Institute of Technology (China)

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