邻相电流对TMR传感器阵列测量精度的影响研究

Research on Influence of Adjacent Phase Currents on Measurement Accuracy of TMR Sensor Arrays

中文关键词:  隧道磁阻  电流传感器  邻相干扰  圆形阵列  邻相误差分析

英文关键词:TMR  current sensor  adjacent phase interference  circular arrays  analysis of adjacent phase error

中文摘要:

      为了计算邻相电流对电流传感器精度的影响程度，基于隧道磁阻（Tunnel Magnetoresistance,TMR）元件测量电流的原理，提出了一种用于表示三相交流系统中由邻相电流引起的被测导体传感器阵列测量误差的解析表达式。然后，以幅值为6 000 A的三相电流为例，通过解析式法和磁场有限元仿真计算，分析了不同因素对被测导体电流传感器测量精度的影响程度。结果表明，所提出的解析表达式能够较为准确地计算邻相电流引起的测量误差；交流大电流场景下，TMR阵列至少需要10个传感器对测量电流值进行相互修正，研究成果为交流系统中三相导体的电流传感器阵列的设计和应用提供了理论基础。

英文摘要:

      In order to calculate the influence of adjacent phase currents on the accuracy of current sensors,based on the principle of current measurement by tunnel magnetoresistance(TMR) elements,an analytical expression for the test conductors sensor arrays measurement error caused by adjacent phase currents in a three-phase alternating current system is proposed.Then,in the case of a three-phase current with an amplitude of 6 000 A,the influence of different factors on the measurement accuracy of the current sensors of the conductors to be tested is analyzed by analytical method and magnetic field finite element simulation.The results show that the proposed analytical expression can calculate the measurement error caused by adjacent phase currents more accurately.With the alternating current high-current scenarios,the TMR arrays are designed to mutually correct the measured current with at least 10 sensors,and the research provides theorical basis for the design and application of current sensor arrays for three-phase conductors in alternating current systems.