Single Stage Multiple Source Bidirectional Converter for Electric Vehicles

Multiple battery energy storage system is gaining popularity for electric vehicles (EVs). This article presents a novel technique for charging multiple batteries using multi-source bidirectional converter (MSBC) for EV application. The DC/DC converter is eliminated which is otherwise used for battery charging. This reduces the size and weight of EVs and improves overall efficiency of the electric vehicle drive. The stator winding of the traction motor is used to charge batteries so the inductance requirement is also eliminated. This scheme is suitable for single phase level 1 charging of EVs. The bidirectional converter is also used for running EV traction motor through main battery. This paper discusses operation of MSBC while charging through single phase supply, the voltage/current waveforms, and the switching sequences. The performance of the proposed model in the MATLAB/Simulink environment is presented for validation of proposed concepts.