In this work, an open-loop current sensor based on giant magnetoresistance (GMR) effect in magnetic multilayered systems was designed and developed. The whole design of the current sensor consisting of a magnetic field sensing element, a current-carrying conductor, a permanent magnet, and a magnetic shield was conceptualized through FEM analyses. The simulated model was then replicated into a prototype device and the output characteristics were investigated thoroughly under different ambient conditions. It was observed that in an analog mode, the sensor output was linear in the current range of± 50 A over the temperature range of − 40 °C to 125 °C and showed a − 3 dB frequency response at 7.5 kHz. A thermal drift and offset were observed at the analog output which further compensated through a commercial mixed-signal conditioner. The compensated output showed a total error less than 1% F.S. over the operating temperature range of − 25 °C to 105 °C.

在这项工作中，设计和开发了一种基于磁多层系统中巨磁电阻 (GMR) 效应的开环电流传感器。由磁场传感元件、载流导体、永磁体和磁屏蔽组成的电流传感器的整体设计是通过有限元分析概念化的。然后将模拟模型复制到原型设备中，并在不同环境条件下彻底研究输出特性。据观察，在模拟模式下，传感器输出在 ± 50 A 的电流范围内在 - 40 °C 至 125 °C 的温度范围内呈线性，并且在 7.5 kHz 时显示出 - 3 dB 的频率响应。在模拟输出处观察到热漂移和偏移，通过商用混合信号调节器进一步补偿。