Design and Simulation of High-Efficiency Three Level T - type Resonant Converter for the Charging of Electric Vehicle (EV) Battery

The integration of a T-type inverter into an Inductor - Inductor - Capacitor (LLC) resonant DC-DC converter is motivated by its exceptional characteristics, including superior efficiency, minimal electromagnetic interference (EMI), and compact architecture, which are critical for addressing the growing demands of reliable and efficient electric vehicle (EV) charging systems. Conventional high-power charging solutions often face limitations such as excessive conduction losses, elevated voltage stress on components, and insufficient power density, restricting their adoption in next-generation EV technologies. To overcome these challenges, this paper proposes an innovative Ttype LLC resonant DC-DC converter designed as a high-power charging solution for modern EVs. The converter incorporates a T-type inverter topology on the primary side and a full-bridge rectifier on the secondary side, achieving significant reductions in energy losses and enhanced operational efficiency. The design methodology emphasizes precise tuning of critical parameters, including the transformer turns ratio, resonant inductor, resonant capacitor, and magnetizing inductor, optimized for a power output of 5 kW and an operating voltage of 48 V. The system is modeled, developed, and validated through comprehensive simulations in MATLAB/Simulink, demonstrating notable advancements in reliability and efficiency. The proposed T-type LLC converter not only surpasses conventional solutions in performance but also provides a scalable and robust framework for high-power EV charging stations. With its high efficiency, reduced EMI, and compact design, this converter sets a new benchmark for sustainable and efficient EV charging technologies, driving innovation in future transportation systems