摘要
使用电磁兼容标准中规定的测试系统测量短时变频磁场信号代价过高,为了解决这一问题,论文设计了适用于大功率电磁装置短时变频磁场辐射测量的测试系统,并与电磁兼容标准中规定的测试系统进行了测试对比。所设计的测量系统由三维磁场探头、多通道示波器和虚拟接收机软件三部分组成,测试时,首先使用三维磁场探头和多通道示波器获取被测短时变频磁场信号的时域波形,然后使用基于Matlab的虚拟接收机软件分析被测信号的频谱特性。实验表明,所设计的测试系统能够准确捕捉待测设备在各个频率上的最大发射幅度,且具有测量成本低、测试耗时短的优点。
The cost is too high when measuring short-time and frequency-conversion magnetic field signals with the measurement systems recommended in electromagnetic compatibility（EMC） standards. To solve this problem,a novel magnetic field measurement system,which is composed of 3-D magnetic-filed detector,multi-channel oscilloscope and virtual EMI receiver software,is designed in this paper. To measure the short-time and frequency-conversion magnetic field signal radiated by high-power electromagnetic equipments,time domain waveform of the signal is firstly obtained by the 3-D magnetic-field detector and multi-channel oscilloscope,and then frequency spectrum of the captured waveform is analyzed using the virtual EMI receiver software which is designed based on Matlab. The experimental result indicates that the result obtained by the designed measurement system matches well with the measurement result of the systems recommended in EMC standards.
出处
《电工技术学报》
EI
CSCD
北大核心
2010年第9期8-13,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50721063
50677070)
关键词
短时变频
磁场辐射
测试系统
虚拟接收机
Short-time and frequency-conversion
magnetic-field emission
measurement system
virtual EMI receiver
作者简介
张向明 男，1983年生，博士研究生，研究方向为电力系统中的电磁兼容。
赵治华 男，1962年生，教授，博士生导师，研究方向为电磁场及电磁兼容性等。
