Multi-objective hybrid optimized coil design for enhanced efficiency, improved voltage gain, and compactness for inductive power transfer

With a rising global population and vehicle usage, electric vehicles (EVs) have emerged as a sustainable solution for carbon neutrality. The paper's main objective is to test the performance of the optimized coil design for the Inductive power transfer (IPT) prototype designed for 48 V light EV (LEV) applications operating at 86 kHz. The coils are optimized for objectives such as compactness and power transfer efficiency, using a hybrid multi-objective optimization algorithm combining Taylor-series tuning and Dove Swarm (DSO) optimization. The optimized coil design achieved power transfer efficiency (PTE) of 94% with a voltage gain of 0.93 and current gain of 0.9. A minimum drop of approximately 0.7 V (1.5%) is observed between the primary to secondary coils. Simulation and hardware tests showed minimal voltage loss and strong coupling, validated for variable frequency operation. This shows the robustness of the LC optimized coil compact IPT system designed in this paper. Compact coil design in this research aids in high power transfer efficiency while reducing size, making it well-suited for LEV wireless charging.