一种消除地磁影响的无磁环TMR电流传感器用于非接触电流检测

IF 4.3 2区 综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Gui-Fang Li;Chuhan Gao;Yongqian Du;Dejiang Li;Feiyang Peng;Siyu Men;Yue Tan;Shibin Liu
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引用次数: 0

摘要

在紧凑型电力电子器件中,无磁环电流传感器因其体积小、重量轻而越来越受到青睐。然而,在高精度的小电流测量中,地磁场会带来很大的误差。为了解决这一问题,采用由4个高灵敏度隧道磁阻(TMR)元件组成的桥式结构传感器芯片,设计了一种新型无磁环电流传感器,消除了地磁场干扰,从而实现了精确的小电流测量。该传感器对地磁场工作在零磁通状态,地磁信号通过反馈线圈反馈,与反馈线圈产生的磁场有效抵消地磁场。这种设计使电流传感器能够实现高精度测量。实验结果表明,在±1.8 a的感应范围内,该电流传感器的灵敏度为3.808 V/ a,测量精度为±1.854%。这些发现为未来的电流传感器提供了一种新的设计策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Magnetic-Ring-Free TMR Current Sensor Eliminating Geomagnetic Influence for Noncontact Current Detection
In compact power electronic devices, magnetic-ring-free current sensors are increasingly preferred due to their compact size and lightweight nature. However, in high-precision small current measurements, the geomagnetic field can introduce substantial errors. To address this issue, a sensor chip using a bridge structure composed of four highly sensitive tunnel magnetoresistance (TMR) elements was employed, and a novel magnetic-ring-free current sensor was designed that eliminates geomagnetic field interference, thereby achieving precise small current measurements. This sensor operates in a zero-magnetic-flux state for the geomagnetic field, where the geomagnetic signal is fed back through a feedback coil, effectively canceling the geomagnetic field with the magnetic field generated in the feedback coil. This design enables the current sensor to achieve high-precision measurements. The experimental results showed that the current sensor achieved a sensitivity of 3.808 V/A and a measurement accuracy of ±1.854% within a sensing range of ±1.8 A. These findings offer a novel design strategy for future current sensors.
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来源期刊
IEEE Sensors Journal
IEEE Sensors Journal 工程技术-工程:电子与电气
CiteScore
7.70
自引率
14.00%
发文量
2058
审稿时长
5.2 months
期刊介绍: The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice
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