Research on zero-sum magnetic field integral technology of optical current sensors

Shen-wang Li; Wen-bin Yu; Guo-qing Zhang; Zhi-zhong Guo; Yan Shen

doi:10.1117/1.OE.52.10.104105

17 October 2013 Research on zero-sum magnetic field integral technology of optical current sensors

Shen-wang Li, Wen-bin Yu, Guo-qing Zhang, Zhi-zhong Guo, Yan Shen

Author Affiliations +

Optical Engineering, Vol. 52, Issue 10, 104105 (October 2013). https://doi.org/10.1117/1.OE.52.10.104105

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.

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Shen-wang Li, Wen-bin Yu, Guo-qing Zhang, Zhi-zhong Guo, and Yan Shen "Research on zero-sum magnetic field integral technology of optical current sensors," Optical Engineering 52(10), 104105 (17 October 2013). https://doi.org/10.1117/1.OE.52.10.104105

Published: 17 October 2013

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