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This work aims to investigate the electromagnetic disturbances generated by a rectifierchopper association. Electromagnetic conducted emissions are a phenomenon that is difficult to predict, particularly within a complex power grid which includes static converters, considered to be the origin of these disturbances. In this paper, the EMC behavior of a switching cell is studied, using both experiments and simulations. A comparison results is also presented. Shape and amplitude of disturbances carried out will play an important role in the propagation phenomena of disturbances over a network using a Line Impedance Stabilizer Network (LISN), simulations have been done with Ltspice software. The results underscore that the nature of disturbances induced in the network is dependent on the operating region of the bridge. The main conclusion of this work is that this device is really electromagnetic pollutant and must then be taken into account, as a whole, in any study implying this kind of converters. The results will be used in optimizing the dimensions of EMC filters to be placed at the input side of the converter depending on the network and converter's impedances.

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