工控系统感性负载所引起的干扰及其抗干扰设计

由于工业现场存在着大量的感性负载,如交、直流继电器、接触器、变压器和交直流电磁铁等,当对其进行投切操作时,会在电感线圈的两端产生极高反向电动势,引起强烈的高频电磁干扰,而且会使触点间隙产生电弧击穿,并通过传导作用而施于电源侧的计算机,严重影响附近工作的计算机控制系统的正常运行。

Interference Caused by Perceptual Load of Controllable System and Its Anti-jamming Design

There is a lot of perceptual load in industrial scene,such as at the two ends of inductive chokes of AC and DC relay,contactor,transformer and AC/DC electromagnet.When it is operated,there will be very high revertive electromotive force which will cause high frequency electromagnetic interference and arc through in the contact clearances.Furthermore,it will influence the computer in the mains side by transmitting.It will even seriously influence the normal working of the controllable system of nearby comput...