The present work describes the implementation and control of a highly efficient power conversion architecture that is designed specifically for electric vehicles (EV), allowing it to perform both motor driving and onboard battery charging functions. The system presented in this study employs a grid connected interleaved totem pole converter as the front stage bidirectional ac/dc interface. It provides PFC and can function as a three phase inverter by time multiplexing of a full bridge. The advantages of this system include: lower loss due to less conducting paths; higher efficiency; less ripple within the input current waveform; and close to near-unity power factor operation. Additionally, the system can also be controlled to operate as a motor controller. The rear stage utilizes a DAB DC–DC converter integrated with a high-frequency transformer for electrical isolation; bi-directional power transfer; and high power density suitable for fast charge and drive. An ANN-based control method will be used for enhancing the overall dynamic as well as steady-state behavior across all of the various operating modes. Conventional double closed loop control methods will also be employed. A small-signal representation of each of the two CONVERTER STAGES IS DEVELOPED IN ORDER TO PROPERLY SELECT CONTROLLERS AND DETERMINE HOW THEY WOULD INTERACT. Simulations were performed through MATLAB/Simulink simulations to verify the effectiveness of the developed system. These simulations demonstrated an enhancement in overall efficiency, reduction in total harmonic distortion, improvement in transient response, and stable operation over a wide range of charge/discharge states.

This paper developed an on-board charger and motor drive for electric vehicles (EVs), consisting of both a n interleaved totem-pole AC/DC converter together with a Dual Active Bridge (DAB) DC–DC converter. The proposed integrated design is capable of providing the functions of charging and driving as part of one system, thereby minimizing hardware, reducing complexity and overall system size, increasing system efficiency and power density. The interleaved totem-pole converter efficiently converts from AC to DC at the input side with built-in Power Factor Correction (PFC), minimized conduction loss and reduced output AC ripple. The DAB also provides galvanic isolation and allows for bi-directional power transfer among the grid, battery, and motor grid, battery and motor. By coordinating the two converters for simultaneous or sequential use, it allows for smooth transitions between charging/discharging and driving modes. To improve the performance of this hybrid system, Artificial Neural Network (AN5N) based controls were applied. The ANN controller has improved time-domain response, voltage stability and fault tolerance of the system across an extensive range of operating conditions. In addition, Model Predictive Control strategy (MPC) was used to control the speed of the Permanent Magnet Synchronous Machine (PMSM) during driving mode. The MPC enabled precise tracking of desired speeds and faster transient responses than conventional controllers. The obtained simulation results generated by MATLAB/Simulink confirm that the developed system can operate at high efficiencies and low THD levels with stable behavior over a wide number of operating conditions.

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