磁保持继电器的电磁屏蔽研究

Electromagnetic Shielding Research of Magnetic Latching Relay

简单介绍了磁保持继电器应用条件(低频情况)下的屏蔽原理,以某型号磁保持继电器为基础,利用Ansys仿真软件,建立了磁保持继电器电磁系统模型。设计了全封闭和半封闭两种形状的电磁屏蔽体,并分析了单独加入屏蔽体对磁保持继电器电磁系统的影响。分析了不同位置不同充磁方向的外部永久磁钢(静磁场干扰源)对电磁系统的影响,确定了外部干扰源对电磁系统影响最大的位置。建立了电磁屏蔽整体模型,并就屏蔽体对外部干扰源的屏蔽效果进行了分析。

This paper simply introduced the principle of shielding when the magnetic latching relay is applied under the condition of low frequency.By the Ansys simulation software,a magnetic latching relay electromagnetic system model was established based on some magnetic latching relay.Two shapes of electromagnetic shielding-closed and semi-closed were designed.And the influence on magnetic latching relay electromagnetic system was analyzed when alone to join the shield.The influence on electromagnetic system was analyzed by different static magnetic field interference sources.The maximum impact position was determined when adding external interference sources.The whole model about electromagnetic shield was established and the shielding effect of the shield was analyzed.