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Analytical identification of the differential mode impedance of a cell buck DC-DC converter

In this paper, we propose a method for identifying the differential mode impedance of a paralleled converter cell. The equivalent Thevenin / Norton circuit method is used for prediction. The predict of ElectroMagnetic Interference (generated by converters connected to the electrical network to identify the sources of noise, impedance and harmonics according to the identification of the contribution of impedances to the improvement of filters which are considered as filter charges (upstream and downstream filter side). The model is tested by the PSpice simulation with a broad range of frequencies up to 30 MHz.