Bibliographic Details
| Title: |
Simulation-based parameter optimization and development of a split-core fluxgate DC current sensor. |
| Alternate Title: |
开合式磁通门直流电流传感器仿真参数优化与研制. |
| Authors: |
Dechao, YANG1, Junjiang, SHI1, Zhengang, ZHAO1,2 zhaozhengang@kust.edu.cn, Yingjie, HOU1, Kuisong, YANG1, Xin, JIANG1 |
| Source: |
Journal of Measurement Science & Instrumentation. Dec2025, Vol. 16 Issue 4, p588-602. 15p. |
| Subjects: |
Fluxgate magnetometers, Structural optimization, Calibration, Magnetic hysteresis, Sensitivity analysis, Measuring instruments, Finite element method |
| Abstract (English): |
Fluxgate current sensors (FGCSs) are increasingly employed in power systems due to their high-precision characteristics, yet their measurement flexibility remains constrained by conventional closed-core designs. To address this limitation, we proposed a split-core sensor structure comprising four magnetic core strips, which achieved non-intrusive current measurement while maintaining detection accuracy. An analytical model of the induced electromotive force was established based on the probe’s geometric configuration, followed by finite element simulations to optimize key parameters including core radius, core width, excitation coil turns, and sensing coil configuration. A complete prototype integrating the measurement probe, excitation circuit, and signal processing circuitry was developed and experimentally validated. The experimental results show a sensitivity of 0.109 9 V/A, a hysteresis error of 0.559%, and a repeatability error of 1.574% over a measurement range of ±10 A. After polynomial fitting-based error compensation, the nonlinearity error was reduced to 0.208%, achieving performance comparable to closed-core sensors. This work provided a practical solution for applications demanding both high measurement accuracy and installation flexibility. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
磁通门电流传感器凭借其高精度特性在电力系统中的应用日益广泛, 但传统磁通门电流传感器的闭合磁芯设计使其测量 灵活性受限。本文提出一种采用四磁芯条构成的开合式传感器结构, 在保持测量精度的同时实现非侵入式电流检测。基于所设计 的传感器探头结构建立了感应电动势数学模型, 通过有限元仿真对磁芯半径、磁芯宽度、激励线圈匝数以及感应线圈构型进行了 参数优化与分析, 研制了包含测量探头、激励电路和信号处理电路的传感器原型并完成性能测试。实验结果表明: 在±10 A 的测 量范围内具有 0. 109 9 V / A 的灵敏度、0. 559% 的迟滞误差和 1. 574% 的重复性误差。经多项式拟合法进行误差补偿后, 非线性误 差降低至 0. 208%, 与采用闭合磁芯结构的传感器性能相当。该研究为需兼顾高精度与安装灵活性的应用场景提供了实用化解决 方案。 [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
