Prediction of the Conduction Interference in IGBT series structure converter

The transmission path of the Conduction Interference is proposed after analyzing the converter valve´s mechanism of the noise emission. Using the Fourier transformation theory to get the spectrum of the converter´s Common mode voltage and Differential mode voltage by the two different modulation methods (SPWM and SVPWM), as well as the dead time affects on the Emission. It´s conclude that the IGBT´s characterized model, the parasitic parameter extraction and the controller model are all make great contributed to the precise of the forecast result. The simulations based on ANSOFT indicate the reliability of the model and the formulas of spatial frequency spectrum.