Design and Analysis of an Anti-Misalignment Wireless Power Transfer System

Wireless power transfer (WPT) has attracted considerable attention due to its potential application prospect. It has a requirement that the transmitting coil and receiving coil should be aligned with each other during the charging process. Once axial or radial misalignment occurs, transfer efficiency decreases. To cope with this problem, an anti-misalignment WPT system is proposed in this letter. It is designed based on nonlinear Duffing resonance. The proposed system is theoretically analyzed and power transfer efficiency is computed. Simulation and experimental work are conducted to validate the performance of the proposed system. Compared with the traditional linear WPT system, the results show that the output voltage of the proposed nonlinear system is robust to variations of operating frequency. Under axial and radial misalignments, it is found that the power transfer efficiency of the proposed anti-misalignment system is generally higher than the linear counterpart.

Automated summary

Wireless power transfer (WPT) has gained attention for its potential applications. The alignment of the transmitting and receiving coils is essential for efficient charging, as misalignment decreases the transfer efficiency. To address this, a nonlinear Duffing resonance-based anti-misalignment WPT system is proposed in this study. The system is theoretically analyzed, and the power transfer efficiency is computed. Simulations and experiments confirm the superior performance of the proposed system, with higher power transfer efficiency compared to linear systems even under axial and radial misalignments.