期刊论文

中文

仪表技术与传感器

1002-1841

2022

5

88-92

10.3969/j.issn.1002-1841.2022.05.018

本校为第一机构

高精度磁传感器应用于铜排电流测量时往往会受到量程的制约,差分磁场技术为铜排电流测量提供了一种新的方法。在输电铜排的中心处打孔以形成差分磁场,差分形式使得大电流产生的磁场强度大幅度衰减,因此量程受限的磁传感器可以拥有更大的电流测量范围。利用一对高灵敏度磁通门传感器芯片对差分磁场进行测量,部分抑制了来自外部的杂散磁场。使用有限元法对铜排的磁场分布进行了仿真分析,在此基础上设计了传感器样机并进行测试与实验研究。系统测试与结果分析表明,传感器样机在1 kA量程内相对误差优于1.5%,全量程测量精度可达0.8%。测试结果验证了测量方案的可行性与实用性。

The application of high-precision magnetic sensor in busbar current measurement is often limited by the measurement range.Differential magnetic field technology provides a new method for busbar current measurement.A hole was drilled in the center of the busbar to form a differential magnetic field and the differential form caused the magnetic field generated by a large current to decrease substantially.The magnetic sensor with limited range had a larger current measurement range.A pair of high sensitivity fluxgate sensor chips was used to measure the differential magnetic field,which partially...