An approximation to EMI noise problem to design an appropriate EMI filter including double-LISN

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 beginner engineers as well as for experienced engineers when they face new design circumstances. Due to this, predicting and solving EMI emissions related to common mode (CM) situations in induction motor drive systems requires various frequency-dependent effects to be considered. Thus, the application of circuitry to increase the performance per size, prevent dependency on some parameters of the motor and the new conditions corresponding to the new technological improvements in daily systems for electromagnetic interference (EMI) filters is considered.