低频脉冲磁场对屏蔽体耦合特性的试验研究

Experimental Study on Coupling Characteristics of Low-Frequency Pulse Magnetic Field to Shield

低频脉冲磁场对屏蔽体的耦合效应与低频磁场自身参数、屏蔽体尺寸、材料特性及屏蔽体结构有关,作用过程比较复杂,实际耦合强度和规律应以试验研究结果确定。目前关于时变磁场的研究成果主要集中在单频磁场、快沿磁场等方面,而且效应试验研究较少。针对此种情况,文章选取钢板、纯铁板和铜板等几种常用的金属材料,制作了相应的屏蔽体缩比模型,利用低频脉冲磁场模拟试验系统研究了两者的耦合规律,分析了电磁参数等因素对耦合特性的影响,在一定程度上弥补了目前研究成果的不足。

The coupling effect of the low-frequency magnetic field on shield is related to the low-frequency magnetic field self-parameter,the size of shield,the material characteristics and the structure of shield.The action process is complicated,and the actual coupling strength and rule should be determined by the experimental research results.At present,the research results on time-varying magnetic fields mainly focus on single-frequency magnetic field and fast-track magnetic field,and there are few effect test studies.In view of this situation,this paper selects several commonly used metal materials such as steel plate,pure iron plate and copper plate,and produces the corresponding shielding ratio reduction model.The coupling law of the two is studied by using the low-frequency pulse magnetic field simulation test system,and the influence of parameters and other factors on the coupling characteristics are analyzed,which can make up for the shortcomings of the current research results to a certain extent.