A PSO-based Optimization Design of W-Type Non-Contact Transformer for Stable Power Transfer in DWPT System

In dynamic wireless power transmission (DWPT) system, the design of non-contact transformers plays a significant role in output power and its stability, which is closely related to the coupling coefficient. This paper presents a design method for DWPT system based on automated guided vehicle (AGV), and take into account W-type structure of non-contact transformer optimization. Therefore, through the adjustment of multiple physical parameters (the width of the primary coil, ferrite size and spacing) to achieve the goals: 1.8kW output power with minimal ferrite usage during the movement of the vehicle. Moreover, through the combination of finite element method (FEM) and sensitivity analysis based on Latin hypercube sampling (LHS), a high-precision response surface is established, and the non-contact transformer is multi-objective optimized through particle swarm optimization (PSO) algorithm. Finally, based on Pareto front of the optimization results, a platform based on the compensation topology of LCC-S is built. Experimental results are highly consistent with the design, achieving 1.8kW stable output power during AGV movement and the efficiency of the entire system reaches 92.7%.