Common-Mode and Differential-Mode Noise Equivalent Circuits for Boost Power Factor Correction Converter

In this chapter, the propagation paths for the common-mode (CM) and differential-mode (DM) noises of the boost power factor correction (PFC) converter is analyzed. It is found that the CM and DM noises affect each other, leading to mixed-mode noise. To suppress the mixed-mode noise, the DM capacitors can be added at the AC and DC sides of the rectifier bridge. After that, the CM and DM noise equivalent circuits are derived, which provide the basis for predicting the CM and DM noise spectra of boost PFC converter with different control schemes. Additionally, the design of electromagnetic interference (EMI) filters for the boost PFC converter is also presented in this chapter.