AN APPROXIMATION TO IMPROVE EMI PASSIVE FILTER CONDITION WITH TRIPLE-LISN FOR EMI NOISE PROBLEM

Abstract

Fixing conducted EMI problems with EMI filters is not en exact science. It normally involves a cut-and-trial process for a designer to come up with a proper filter design or approximation. As such, designing a filter is a time-consuming process for beginning engineers as well as for experienced engineers when they face new design circumstances¹⁾. Due to this, predicting and solving EMI emissions related to Common Mode (CM) ones induction motor drive systems requires various frequency-dependent effects to be considered^2),3). The new conditions corresponding to the new technological improvements both software and hardware ones in our daily systems for Electro-Magnetic Interference (EMI) passive filter is considered. Thus, EMI passive filter approximation is studied on new Triple-LISN circuit structure especially for CM currents that can suppress EMI noises in some extend in the motor drive system.