Breaking Free from Cords: Enhancing Wireless Power Transfer with a Hybrid Coupling Topology

Wireless power transfer (WPT) technology eliminates the need for cables and cords, providing a convenient and efficient method for transferring electrical power. The transmitter sends out electromagnetic waves that are converted into electrical energy by the receiver, with the power transferred through an air gap. This study aims to enhance the performance of WPT by developing a hybrid coupling topology that combines Inductive Power Transfer (IPT) and Capacitive Power Transfer (CPT) to create a high-efficiency system. IPT makes the power efficiency drop affected by the eddy current losses occur. Meanwhile, the CPT operation only does in the short-term distance in the WPT system. To solve these issues, this study proposes the use of both inductance and capacitance in a hybrid coupling circuit. The hybrid topology is simulated using MATLAB@Simulink in both Series-Series (SS) and Parallel-Parallel (PP) compensation. The simulations vary in frequency and duty cycles and different load resistances at the receiving end to obtain precise results. The study evaluates the output power and efficiency to minimize any losses in the system and maximize efficiency and power transfer. The results provide insights into how the hybrid coupling topology can be optimized for WPT, leading to more efficient WPT at 11.2% under PP compensation performed.