TMR array with circular skeleton coil for high-current measurement

DC high current measurement is one of the important supporting technologies of the power system. As an emerging current sensing technology, tunnel magnetoresistance (TMR) has attracted more and more attention due to its advantages of high sensitivity and good linearity. But the TMR sensor is not sui...

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Autores principales:	Changxi Yue, Jicheng Yu, Hongda Zhang, Siyuan Liang, Lingjie Xu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Tunnel magnetoresistance Current sensor Circular array Skeleton coil Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/5281447a1c5e44199cb3ffd97903c040
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id	oai:doaj.org-article:5281447a1c5e44199cb3ffd97903c040
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spelling	oai:doaj.org-article:5281447a1c5e44199cb3ffd97903c0402021-11-26T04:33:10ZTMR array with circular skeleton coil for high-current measurement2352-484710.1016/j.egyr.2021.08.042https://doaj.org/article/5281447a1c5e44199cb3ffd97903c0402021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2352484721006442https://doaj.org/toc/2352-4847DC high current measurement is one of the important supporting technologies of the power system. As an emerging current sensing technology, tunnel magnetoresistance (TMR) has attracted more and more attention due to its advantages of high sensitivity and good linearity. But the TMR sensor is not suitable for high current measurement, and its accuracy can be further improved. Aiming at these problems, this paper proposes a TMR array with a circular skeleton coil for high current measurement. Eight TMR chips are evenly installed on the circular skeleton coil to measure the magnetic field generated by the primary current carrying conductor, and the output of the feedback amplifier generates a compensation current to the feedback winding to generate a compensation magnetic field, so that the magnetic flux in the sensor is almost zero. The circular structure can reduce measurement errors caused by wire offset and external interference. Since there is no iron core, the nonlinear errors are also avoided. Simultaneously, the feedback loop designed based on zero magnetic flux principle can reduce the hysteresis error and expand the measurement range, making the sensor suitable for DC high current measurement. This paper proposes a new TMR array current sensor model, builds a prototype and compares it with a closed-loop TMR current sensor with an iron core. Experimental results proved that the TMR array sensor’s DC measurement error could be lower than 0.01%, compared to 0.32% of the closed-loop current sensor. Moreover, the proposed current sensor consistently has higher measurement accuracy in the full range of primary current.Changxi YueJicheng YuHongda ZhangSiyuan LiangLingjie XuElsevierarticleTunnel magnetoresistanceCurrent sensorCircular arraySkeleton coilElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENEnergy Reports, Vol 7, Iss , Pp 312-319 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Tunnel magnetoresistance Current sensor Circular array Skeleton coil Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Tunnel magnetoresistance Current sensor Circular array Skeleton coil Electrical engineering. Electronics. Nuclear engineering TK1-9971 Changxi Yue Jicheng Yu Hongda Zhang Siyuan Liang Lingjie Xu TMR array with circular skeleton coil for high-current measurement
description	DC high current measurement is one of the important supporting technologies of the power system. As an emerging current sensing technology, tunnel magnetoresistance (TMR) has attracted more and more attention due to its advantages of high sensitivity and good linearity. But the TMR sensor is not suitable for high current measurement, and its accuracy can be further improved. Aiming at these problems, this paper proposes a TMR array with a circular skeleton coil for high current measurement. Eight TMR chips are evenly installed on the circular skeleton coil to measure the magnetic field generated by the primary current carrying conductor, and the output of the feedback amplifier generates a compensation current to the feedback winding to generate a compensation magnetic field, so that the magnetic flux in the sensor is almost zero. The circular structure can reduce measurement errors caused by wire offset and external interference. Since there is no iron core, the nonlinear errors are also avoided. Simultaneously, the feedback loop designed based on zero magnetic flux principle can reduce the hysteresis error and expand the measurement range, making the sensor suitable for DC high current measurement. This paper proposes a new TMR array current sensor model, builds a prototype and compares it with a closed-loop TMR current sensor with an iron core. Experimental results proved that the TMR array sensor’s DC measurement error could be lower than 0.01%, compared to 0.32% of the closed-loop current sensor. Moreover, the proposed current sensor consistently has higher measurement accuracy in the full range of primary current.
format	article
author	Changxi Yue Jicheng Yu Hongda Zhang Siyuan Liang Lingjie Xu
author_facet	Changxi Yue Jicheng Yu Hongda Zhang Siyuan Liang Lingjie Xu
author_sort	Changxi Yue
title	TMR array with circular skeleton coil for high-current measurement
title_short	TMR array with circular skeleton coil for high-current measurement
title_full	TMR array with circular skeleton coil for high-current measurement
title_fullStr	TMR array with circular skeleton coil for high-current measurement
title_full_unstemmed	TMR array with circular skeleton coil for high-current measurement
title_sort	tmr array with circular skeleton coil for high-current measurement
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/5281447a1c5e44199cb3ffd97903c040
work_keys_str_mv	AT changxiyue tmrarraywithcircularskeletoncoilforhighcurrentmeasurement AT jichengyu tmrarraywithcircularskeletoncoilforhighcurrentmeasurement AT hongdazhang tmrarraywithcircularskeletoncoilforhighcurrentmeasurement AT siyuanliang tmrarraywithcircularskeletoncoilforhighcurrentmeasurement AT lingjiexu tmrarraywithcircularskeletoncoilforhighcurrentmeasurement
_version_	1718409841308860416

TMR array with circular skeleton coil for high-current measurement

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