A new behavioural model for performance evaluation of common mode chokes

Abstract

A behavioural model for performance evaluation of a common mode choke (CMC) is proposed: the topology and methods used to model the different properties of the CMC are presented. It combines an accurate model of the complex permeability, of the saturation, of leakage inductances and of parasitic capacitances. Inputs needed from the designer are measured values of currents, voltages and impedance of the actual system, and parameters available in literature and/or from manufacturers for the modelled CMC. The behavioural model is essential in simulation of EMI effects.

Analyzing and Characterizing Common Mode Chokes for Three Phase Systems

“…In recent years, an important effort has been made to develope techniques for obtaining high-frequency circuit models of 2W-CMCs [10]- [19]. However, much less works have been published dealing with the characterization of CMCs for threephase applications or analysing its effect on noise modes in the three-phase line [20].…”

Simple Setup for Measuring the Response to Differential Mode Noise of Common Mode Chokes

“…Within this category of full characterization methods, several methods have been reported to obtain equivalent circuits for transformers and coupled coils [7][8][9][10][11]. Some of these methods have been particularized or directly conceived to be applied to CMCs [6,12,13]. The main drawback of these methods is that they often involve impedance measurements for different connections of the CMC and that they require a post-processing of the obtained data.…”

Optimizing capacitor placement in EMI-filter using back annotation of 3D field coupling parameters in circuit models

“…The parasitic effects of individual components has been a topic of research over the years, while accurate models were developed [? ], [3]. The degradation of EMI filter insertion loss due to these self parasitic effect have been studied extensively.…”