General Analysis on the Use of Tesla's Resonators in Domino Forms for Wireless Power Transfer

TLDR

The paper reviews wireless power history and proposes using Tesla resonators in domino configurations at sub‑megahertz frequencies to reduce power loss and extend transmission distance. Analytical formulas for optimal load and peak efficiency at resonance are derived and validated experimentally on coaxial and noncoaxial domino resonator setups, with relay resonators positioned to maximize energy transfer. Experiments show that unequal spacing in coaxial straight domino systems improves efficiency over equal spacing, and that resonators can be flexibly arranged in various domino forms.

Abstract

In this paper, we present a brief overview of historical developments of wireless power and an analysis on the use of Tesla's resonators in domino forms for wireless power transfer. Relay resonators are spaced between the transmitter and receiver coils with the objectives of maximizing energy efficiency and increasing the overall transmission distance between the power source and the load. Analytical expressions for the optimal load and maximum efficiency at resonance frequency are derived. These equations are verified with practical measurements obtained from both coaxial and noncoaxial domino resonator systems. To avoid the use of high operating frequency for wireless power transfer in previous related research, the technique presented here can be used at submegahertz operation so as to minimize the power loss in both the power supply and the output stage. We demonstrated both theoretically and practically that unequal spacing for the coaxial straight domino systems has better efficiency performance than the equal-spacing method. Also, the flexibility of using resonators in various domino forms is demonstrated.