ENHANCING EFFICIENCY IN WIRELESS POWER TRANSFER SYSTEMS USING RESONANT INDUCTIVE COUPLING AND DYNAMIC WIRELESS CHARGING

Abstract

This article presents a combined approach to enhancing the efficiency of wireless power transfer (WPT) systems, integrating resonant inductive coupling with dynamic wireless charging and optimized energy management. The research focuses on improving energy transmission by maximizing mutual inductance and quality factors of resonant coils in near-field operation. To achieve this, advanced compensation networks and control algorithms were developed, enabling precise resonance tuning and dynamic system stability. The study introduces a mathematical model describing the system’s dynamic state through a resonance energy transfer equation, accounting for resistive losses, reactive coupling, and system nonlinearities, providing a framework for analyzing coil interactions and optimizing inductive coupling parameters.The mutual inductance between coils was further modeled using geometrical and material parameters, and the energy transfer was expressed as a function of angular frequency and transmitter current. An experimental setup was designed to validate the theoretical framework, focusing on dynamic charging for unmanned ground vehicles (UGVs). The prototype system included an array of transmitter coils integrated into a test platform and a receiver coil mounted on a UGV. Multiple scenarios were tested, including various vehicle speeds (0.5–2.0 m/s) and positional misalignments, to simulate real-world operating conditions. Efficiency measurements were conducted using a power analyzer, revealing the relationship between coupling coefficients, quality factors, and energy transfer efficiency. The results demonstrated that high-quality factors and optimal coupling coefficients significantly enhance energy transfer efficiency while mitigating losses. The system was capable of maintaining stable performance despite small positional deviations, highlighting its robustness. Additionally, the influence of coil geometry, spatial distribution, and material properties on magnetic field strength and uniformity was investigated, emphasizing the importance of coil design. The study concludes that the proposed approach effectively addresses the challenges of WPT systems, particularly in dynamic scenarios. However, practical considerations such as thermal management and electromagnetic interference remain critical for real-world implementations, necessitating further research to ensure reliable and scalable solutions.