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Vol. 32, No. 8(2), S&M2292

ISSN (print) 0914-4935
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Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials, Volume 32, Number 9(1) (2020)
Copyright(C) MYU K.K.
pp. 2891-2901
S&M2309 Research Paper
https://doi.org/10.18494/SAM.2020.2902
Published: September 8, 2020

New Magnetic Circuit Structure of Hall Current Sensor for Reducing Conductor Position Error [PDF]

Chao Tan, Chenguang Wu, Xiaohui Gong, Xinglin Li, Ruijie Fu, and Zhoumei Yue

(Received April 22, 2020; Accepted July 15, 2020)

Keywords: current measurement, finite element, Hall current sensor, magnetic induction intensity, position error

To reduce the error of a Hall current sensor caused by the variation of the conductor position, a new symmetrical dual-core four-air-gap magnetic circuit structure is designed. The proposed structure includes two symmetrically placed dual-air-gap magnetic cores and four Hall devices, where the two symmetrically placed dual-air-gap magnetic cores are used as the sensor magnetic circuit and the average voltage output from the four Hall devices is used as the output of the sensor. First, the output error of a traditional Hall current sensor caused by the variation of the conductor position is discussed, and the principle of reducing the error by using a symmetrical dual-core four-air-gap magnetic circuit structure is analyzed. Then, a finite element simulation was performed to mimic the magnetic induction intensity at the air gap of a single-core single-air-gap magnetic core and that of the proposed circuit structure. Then, the relative error of these two circuits was calculated. Finally, a prototype of the proposed circuit structure was manufactured. The simulation and experimental results show that the proposed circuit structure can significantly reduce the measurement error caused by the position deviation of the measured conductor, and the maximum measurement error is only 0.566% when the measured current ranges from 10 to 50 A.

Corresponding author: Chao Tan


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This work is licensed under a Creative Commons Attribution 4.0 International License.

Cite this article
Chao Tan, Chenguang Wu, Xiaohui Gong, Xinglin Li, Ruijie Fu, and Zhoumei Yue, New Magnetic Circuit Structure of Hall Current Sensor for Reducing Conductor Position Error, Sens. Mater., Vol. 32, No. 9, 2020, p. 2891-2901.



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