| Popis: |
Highly-resonant wireless power transfer (HRWPT) has the potential to accelerate the adoption of purely electric (EV) and plug-in hybrid electric vehicles (PHEV) in both private and public transportation applications. Compared to conductive charging solutions, WPT provides more convenience, increased safety, and seamless integration with public infrastructure, all while achieving mains-to-battery efficiencies $>$ 90\%. Moreover, WPT enables the dynamic recharging of electric vehicles driven on electrified roadways, potentially eliminating the need to stop to recharge and reducing the size of battery packs required for longer trips. In this paper, we present an analytical framework consisting of seven high-level parameters that gives a clear picture of the fundamental limits to performance and provides tools for quickly evaluating the trade-offs between different system design choices. We show how these parameters can be related to the maximum achievable efficiency, thermal load on the resonators, and dynamic range of impedances that the power electronics must drive. Finally, we apply this framework to compare systems employing three different impedance matching network topologies popular in the research literature. |
