A discontinuous boost power factor correction conduction loss model

In this paper, a novel effective duty cycle method is introduced to predict the RMS and average current for power components in discontinuous conduction mode (DCM) AC-DC boost power factor correction (PFC) topologies. The proposed model can be used for power component conduction losses estimation. The RMS current and average current of power components are derived. PSIM simulation and experimental results are used to verify the accuracy of calculation. A DCM boost converter prototype which converts universal AC input voltage to 400 V DC bus was built and tested in order to verify the proposed model. Experimental results demonstrate that the proposed model can be used for accurate estimation of RMS and average currents for the boost PFC topology.