Prediction of conducted EMI in power converters using numerical methods

This paper investigates the use of numerical methods for an accurate computer-aided prediction of conducted electro-magnetic interference (EMI), which attracts more and more attention from industry. The three parts of EMI mechanism, which are noise generation, noise propagation and noise receiver, are analyzed and modelled separately. Detailed modelling approaches are described. The prediction approach is then applied to a power converter example and correspondingly prototype of the example is built. With comparison between numerical simulation based prediction and measurement results, the potential to use such techniques in practical application is explored.