Optimization of Low-speed Dynamic Wireless Charging System for Urban Roads

Abstract

The rapid growth of new energy vehicles makes low-speed dynamic wireless charging a key solution to the frequent energy supply demands of urban vehicles. However, vehicles running at 0–30 km/h suffer from large lateral trajectory deviation, frequent start-stop and mixed operation of multiple vehicle types, which easily cause coil coupling failure and power mismatch. This paper optimizes the low-speed dynamic wireless charging system from coil array topology, dynamic power matching algorithm and vehicle-road information interaction. Based on electromagnetic coupling theory and vehicle-road collaboration technology, case analysis and joint simulation are adopted for verification. The results show that the optimized system maintains a coupling efficiency above 85% within a lateral offset of ±40 cm, and power fluctuation is controlled within ±8%. The overall energy waste of the system is reduced by more than 20%. This research effectively solves the technical bottlenecks of unstable coupling and low energy utilization, and provides theoretical support and technical schemes for the large-scale construction of urban road wireless charging infrastructure.