Single Stage On Board Electric Vehicle Charger with Soft Switching and High Efficiency

This paper presents an innovative isolated single- stage on-board electric vehicle (EV) charger utilizing a current-source topology, eliminating the need for an intermediate DC-link. The proposed design achieves soft- switching in semiconductors across all AC line voltages and varying load conditions, optimizing efficiency and reducing switching losses. Notably, it operates without external snubber or clamp circuits, simplifying the design and improving system reliability. The charger employs phase- shift modulation for power factor correction (PFC) and voltage regulation, ensuring minimal circulatingenergy.A3 kW prototype with silicon carbide (SiC) semiconductors demonstrates peak efficiency of 96.4%, with efficiencies above 95% at maximum power and a total harmonic distortion (THD) of 4.1%.The paper includes an analysis of control strategies, component stresses, and design constraints. Experimental results validate the topology’s effectiveness for real-world EV applications. Additionally, an Adaptive Neuron- Fuzzy Inference System (ANFIS) controller is proposed to further optimize performance under variable load and input conditions, enhancing power factor correction and overall efficiency for future smart EV charging solutions