EMC方面的问题-压敏电阻的作用
http://www.21dianyuan.com/bbs/attachments/bmp/2010/01/08/12629424284b46f8dc8aa41.bmp请教一下,图中VR2起什么作用,是针对EMC哪部分的 ,比如浪涌或者瞬态干扰 我也想知道 图片不清楚啊 瞬变浪涌电流的吸收能力,能很好的保护后级元件或电路免遭浪涌电压的破坏。 对雷击测试的. 就是在共模电感的一个线圈并个压敏电阻,这种接法大家有见过吗 图挂了吧
看不见 压敏一般是放在保险管的后面 So far as I know, the MOV (varistor or 压敏电阻) is used to solved the problem in Surge Test. In fact, the surge commonly appears across the AC inputs.Perhaps, you may think the operations of MOV similar toa very high power/ high voltage"ZENER DIODE" . That means the MOV clamps the supply line to a lower voltage when the surge occurs in the AC supply. 防御surge或者esd吧
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