针对10~100 kHz的低频磁场设计了几种屏蔽材料的复合结构,研究不同屏蔽材料对低频磁场的屏蔽效能.结果表明:低频磁场的屏蔽效能主要与材料的磁导率和电导率有关,屏蔽效能随磁场频率的增加而增加;对于不同频率的磁场,通过调整屏蔽材料的复合结构,能够以较低的厚度获得较高屏蔽效能.
Several magnetic shielding materials with compound configuration were designed. The shielding effects of them for low frequency magnetic field between 10 and 100 kHz were investigated. The results show that the shielding effects mainly depend on permeability and conductivity of the material. The shielding effects increase with the frequency of magnetic field increasing. The thin shielding material with appropriate compound configuration shows better magnetic shielding effects at different frequency.
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