Advanced dual-switch converter with proportional integral technique for enhanced efficiency and power quality in electric vehicle energy storage

This paper presents an innovative dual-switch structure combining a three-winding coupled inductor power factor improvement converter (3WCIPFIC) with an advanced proportional integral technique (PIT) for electric vehicle energy storage. The 3WCIPFIC, featuring secondary and tertiary windings with switched-capacitor cells, achieves high-voltage gain with low duty cycle requirements, enabling continuous input current and adjustable voltage gain through precise switch duty cycle and turns-ratio control. Utilizing low-voltage-rated MOSFETs with minimal ON-state resistance reduces voltage stress and losses, enhancing efficiency. Controlling diode current-falling rates with 3WCIPFIC leakage inductances further optimizes performance. The PIT-based control ensures superior dynamic response, addressing traditional AC–DC converter challenges and offering improved performance under varied conditions. Rigorous MATLAB/Simulink modeling validates the converter’s robustness. Testing 1.2kW converters under closed-loop control demonstrates excellent steady-state performance across different source voltages and loads, with resilience to fluctuations and disturbances. Experimental results confirm outstanding transient performance and power quality, achieving unity power factor and low total harmonic distortions. The 96.6% efficiency highlights significant gains, marking a major advancement in power conversion technologies, enabling precise regulation and high-power quality in diverse applications.