Design on electromagnetic compatibility of aeronautic electrical power system tester

This article analyses the electromagnetic interfering sources and its transmitting ways inside aeronautic electrical power system tester and expounds the anti-disturbing methods in designing the electromagnetic compatibility of aeronautic electrical power system tester. Among that the interfering sources are the rectifiers and inverse transformer in the AC frequency converter and the interference signals from electric network, the transmitting ways of the electromagnetic interfering signals include transmitting in electric wires, radiating and coupling through space, and the anti-disturbing methods have (a) separating the interference sources with the system or devices, (b) connecting filters in the output ends of interfering sources and the input ends of the devices easily to be interfernced, (c) shielding the interfering sources, (d) earthing correctly and reliably, (e) adding circuit power filters.