Abstract
The design of an inductive power transfer system for different electric vehicle (EV) models with widely varied battery pack voltages has been a challenging task. The majority of modern EV models are equipped with 400 V or 800 V battery packs. To charge both batteries efficiently, an additional DC-DC converter on the receiver side is employed, which reduces the overall system efficiency and also increases the cost. This article proposes a reduced switch count novel converter to charge distinct EV models without degrading the efficiency of the system. The proposed converter has two operating modes, a voltage doubler mode to charge an 800 V battery and a current doubler mode to charge a 400 V battery at the same power level. MATLAB/Simulink simulations have been carried out to verify the performance of the 3-leg converter for both 400 V and 800 V batteries at 7.2 kW. Furthermore, a laboratory prototype of the proposed converter for 500 W has been built using the SiC devices, and the results obtained are provided.
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