56AMXN
56AMXN
56AMXN
抑制磁场耦合干扰的好办法应该是屏蔽干扰源。大电机、电抗器、磁力开关和大电流载流导线等等都是很强的磁场干扰源。但把它们都用导磁材料屏蔽起来,在工程上是很难做到的。通常是采用一些被动的抑制技术。当回路1对回路2造成磁场耦合干扰时,其在回路2 上形成的串联干扰电压VN为: VN=jωBAcosθ (3) ,式中,ω是干扰信号的角频率;B是干扰源回路1形成的磁场链接至回路2处的磁通密度;A为回路2感受磁场感应的闭合面积,θ是和两个矢量的夹角。可以看出,在干扰源的角频率ω不变时,要想降低干扰电压VN,首先应当减小B。对于直线电流磁场来说,B与回路1流过的电流成正比,而与两导线的距离成反比。因此,要有效抑制磁场耦合干扰,仍然是远离技术。同时,也要避免平行走线。
& 公司全称 : 厦门泰尼电气有限公司
& 销售代表 : 小黄
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& 公司网址 : www.xmtaini.com
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