Call For Paper Volume: V, Issue: 06 | JUNE 2026 | International Journal of Advanced Trends in Engineering and Management (IJATEM)
Volume | Issue | | Paper ID: ICNGECT_2026_017 | DOI: https://doi.org/10.59544/ciim5329/icngect26p17

Designing a Capacitive Wireless Power Transfer System for Electric Vehicles in Motion

R. Vinoth, V. Sivaji, M. Kishore, M. Ranjith

Dynamic wireless power transfer (WPT) is emerging as a promising solution to overcome the limitations of conventional static charging methods for electric vehicles (EVs), particularly the constraints imposed by limited driving range and the reliance on large, heavy battery systems. While static wireless charging has gained global adoption, it requires vehicles to remain stationary and does not adequately address range anxiety. In contrast, dynamic WPT enables energy transfer to EVs while in motion, thereby extending driving range, reducing dependence on high-capacity batteries, and potentially eliminating the need for frequent plug-in charging. This technology operates through electromagnetic coupling between a transmitter coil embedded in the roadway and a receiver coil mounted on the vehicle, where power is transferred via mutual induction. However, system performance is highly sensitive to coil alignment and the air gap between transmitter and receiver. In this study, a pair of copper Archimedean coils is designed and analyzed using ANSYS Maxwell simulation software to evaluate the effects of vertical and horizontal misalignment on power transfer efficiency. The system achieves a transferred power of 3.74 kW across a 150 mm air gap, with a maximum efficiency of 92.4%. For an EV with a 6.1 kW battery capacity, the estimated charging time from a fully depleted state is approximately 1 hour and 39 minutes under these conditions. Furthermore, a dynamic charging lane model is developed, and the power transfer characteristics are evaluated based on mutual inductance as the vehicle traverses the lane. The results demonstrate that dynamic WPT can significantly enhance the operational range of EVs and represents a viable pathway toward continuous, on-the-move charging infrastructure.