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ASEAN Journal on Science and Technology for Development

Abstract

Conventional plug-in charging faces numerous challenges due to radiation hazards, inconvenience, etc. To mitigate the challenges conventional charging methods face, wireless power transfer (WPT) systems emerged as an efficient method for wireless energy transmission across various applications such as electric vehicles, biomedical implants, smartphones, and network sensors. A robust WPT system needs to perform exceptionally well under varying conditions, however, the WPT performance is reduced due to the leakage inductance between the coils. To address this challenge, compensation networks are often employed to minimize the losses and enhance the overall performance of the WPT system. This paper focuses on designing and analyzing WPT systems using magnetic resonance coupling techniques to enhance power transfer efficiency and performance. This study compares the performance of the widely used series compensated series-series (SS) and series-parallel (SP) topologies, revealing that both cannot maintain high efficiency, especially under varying loading and coupling conditions. As a result, this paper proposes a double-sided LC S/P (series resonance inductor and parallel resonance capacitor) hybrid compensation topology for WPT systems, which outperforms series-compensated SS and SP topologies in maintaining high efficiency under varying loading and coupling conditions. The detailed mathematical and simulation results have significantly improved efficiency and output power for the proposed double-sided hybrid LC S/P topology under varying loading and coupling conditions. The results show an efficiency exceeding 82% across a wide range of coupling and loading conditions, indicating its potential for practical WPT applications.

Keywords

Wireless Power Transfer, Mutual Inductance, Coupling Coefficient, Load Resistance, Quality Factor, Compensation Topology, Power Transfer Efficiency.

Received Date

17/11/2024

Revised Date

11/01/2025

Accepted Date

30/01/2025

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