Research on the copper busbar structure of current sensor based on coreless technology

GUAN Ke; WU Yewei; WU Mingming; LI Juping; HUANG Qing; ZHENG Huaxiong

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Research on the copper busbar structure of current sensor based on coreless technology

Research & Approach | 更新时间：2026-03-01

- Research on the copper busbar structure of current sensor based on coreless technology
- Vol. 45, Issue 2, Pages: 23-27(2026)
- 作者机构：
  
  宁波中车时代传感技术有限公司,浙江,宁波,315000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP212
- Published：2026
- 稿件说明：
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GUAN Ke, WU Yewei, WU Mingming, et al. Research on the copper busbar structure of current sensor based on coreless technology[J]. 2026, 45(2): 23-27.
DOI：

GUAN Ke, WU Yewei, WU Mingming, et al. Research on the copper busbar structure of current sensor based on coreless technology[J]. 2026, 45(2): 23-27. DOI：

摘要

针对基于穿孔式无磁芯技术的电流传感器在测量铜排电流时，芯片安装位置误差会极大程度影响其电流检测精度的问题，提出一种优化铜排截面结构的电流传感器设计方案。对铜排结构参数进行分析，采用电磁仿真技术，建立导流铜排磁场分析模型，并通过自主搭建测试平台验证模型的有效性及可靠性。结果表明，宽间隙铜排结构对芯片安装误差容忍度最高，可降低芯片安装误差对测量精度影响，如需满足±0.5%的测量精度，安装误差不得大于0.17mm。研究为无磁芯电流传感器开发提供理论依据及技术支撑。

Abstract

Aiming at the issue that the chip installation position error significantly affects the current measurement accuracy of current sensors based on through-hole coreless technology when measuring copper busbar current

a design scheme for optimizing the busbar cross-section structure of the current sensor is proposed.The structural parameters of the copper busbar are analyzed

and electromagnetic simulation technology is adopted to establish a magnetic field analysis model of the current-carrying busbar. The validity and reliability of the model are verified through a self-built test platform.The results indicate that the wide-gap copper busbar structure exhibits the highest tolerance to chip installation errors

which can reduce the impact of installation errors on measurement accuracy.To meet a measurement accuracy of ±0.5%

the installation error must not exceed 0.17mm. The study provides a theoretical basis and technical support for the development of coreless current sensors.

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