Conducted electromagnetic emission analysis for airborne full bridge AC/DC SMPS

This paper proposes an analytical method based on two ports network to analyze the conducted electromagnetic emission interference of typical airborne full bridge AC/DC Switch Mode Power Supply (SMPS) in tow modes, which are common mode and differential mode respectively. According to the analysis results, the SPICE circuit model of the SMPS is established. The model is simulated and obtained the time domain results. The results are processed by an algorithm that considered intermediate frequency bandwidth influence. The frequency domain calculated results are compared with the practical measurement data. The compare results verify the feasibility and reliability of the above methods.