Power Factor Enhancement Using a Modified Bridgeless Landsman Converter Driven EV Battery Charger

This work proposes a new type of charger for an Electric vehicle (EV) battery. There are many problems with the existing EV charger and one of them is the poor power factor. The main reason for this is the Diode Bridge Rectifier (DBR), which is used at the source side of the existing charger. In the new configuration instead of DBR a landsman converter is used at the source end. The landsman Converter further cascaded to an Isolated Fly back converter which charges the battery. The PI controller is used to control the DC output voltage of the landsman converter to generate the required voltage given as a reference. The Flyback converter is also controlled using the PI controller. Comparison is made between both configurations by comparing the THD (Total Harmonic Distortion) response of both circuits. Furthermore, a new type of configuration that uses both DBR and Landsman converter is simulated in MATLAB and results are compared with other configurations. Further, the proposed system is controlled by a fuzzy controller. The performance of the fuzzy controller-based landsman converter is compared with PI (Proportional Integral) controller. The fuzzy controller-based landsman converter provides better performance for charging applications.