Abstract
A wireless power transmission (WPT) requires high switching frequency to achieve energy transmission; however, existing switching devices cannot satisfy the requirements of high-frequency switching, and the efficiency of current WPT is too low. Compared with the traditional power inductors and capacitors, fractional-order elements (FOEs) in WPT can realize necessary functions though requiring a lower switching frequency, which leads to a more favorable high-frequency switching performance with a higher efficiency. In this study, a generalized fractional-order WPT (FO-WPT) is established, followed by a comprehensive analysis on its WPT performance and power efficiency. Through extensive simulations of typical FO wireless power domino-resonators (FO-WPDRS), the functionality of the proposed FO-WPT for medium and long-range WPT is demonstrated. The numerical results show that the proposed FOE-based WPT solution has a higher power efficiency and lower switching frequency than conventional methods.
Highlights
Wireless power transmission (WPT) is gaining more and more attention in city transportation applications since Tesla firstly revealed WPT in the 1880s [1]
To reduce resonant frequency and improve the output power and efficiency of WPT, this paper proposes a novel WPT implemented with fractional-order elements (FOEs), which we brand fractional-order WPT (FO-WPT)
WPT system, FOEs are applied in a resonant WPT to realize these purpose
Summary
Wireless power transmission (WPT) is gaining more and more attention in city transportation applications since Tesla firstly revealed WPT in the 1880s [1]. Another new method is to determine a model for coupling coefficient to compute optimal frequency for the power transfer [15] To overcome this problem, relay resonators, which are normally used in meta-materials and waveguide research [16], were implemented into WPT for mid-range or even long-range wireless power transfer [17]. Relay resonators, which are normally used in meta-materials and waveguide research [16], were implemented into WPT for mid-range or even long-range wireless power transfer [17] Inspired by this idea, the domino resonators for waveguide applications at 100 MHz have been reported in [18]; the switching frequency is too high for existing power electronics elements.
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