测控系统内部典型器件EFT 干扰辐射特性研究
Study on the EFT Radiation Characteristics of the Typical Devices in
the Measurement and Control System
摘要 介绍了电磁继电器、电感线圈、细长导线等测控系统内部存在的典型器件在开关动作瞬间产生的EFT 辐射的干扰特性。运用非均匀网格FDTD 法建立了典型器件的辐射模型,分析了主要参数变化对辐射特性的影响,并针对各种典型器件的辐射特性,提出了相应的干扰抑制方法。
关键词 非均匀网格FDTD 法;电快速瞬变脉冲群;辐射特性;抑制措施
Abstract The radiation characteristics of electrical fast transients(EFT)from three classica
structures,which are electromagnetic relay,inductance coil and long and thin wire,have
been analyzed. The radiation model has been built by the non-uniform meshing FDTD
method.The corresponding relationship between the main parameters and the radiation
characteristics have been discussed. Finally, according to the radiation characteristic
of each classical structure, some anti-interference methods have been brought forward
Keywords non-uniform FDTD; EFT; radiation characteristic; anti-interference method
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