Three-Resonator Wireless Energy Transfer via Adiabatic Coupling
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Solution Overview
Problem
Current wireless energy transfer methods face inefficiencies and limitations, particularly in transferring energy over long distances without line-of-sight and with minimal energy loss, especially for autonomous electronic devices that require reliable and efficient power supply.
Innovation Solution
The method involves a three-resonator system where energy is transferred from a first resonator to an intermediate resonator and then to a second resonator, with adjustable coupling rates to minimize energy accumulation in the intermediate resonator, optimizing energy transfer efficiency and reducing radiation losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If radiative modes of omni-directional antennas are used for wireless energy transfer, then energy can be transferred without line-of-sight requirements, but a vast majority of energy is wasted into free space
Solution Approach 1:
The system segments the energy transfer path into two stages: first from the source resonator to an intermediate resonator, then from the intermediate resonator to the target resonator. This segmentation allows the use of directed resonant coupling modes rather than omnidirectional radiation, significantly reducing energy waste into free space while maintaining wireless transfer capability
Solution Approach 2:
An intermediate resonator is introduced as a mediator between the source and target resonators. This intermediate structure enables efficient energy transfer by providing a resonant coupling pathway that concentrates energy transfer in specific directions rather than radiating energy omnidirectionally into free space
2Loss of energy
If directed radiation modes using lasers or highly-directional antennas are used for energy transfer, then energy transfer efficiency is improved, but an uninterruptible line-of-sight and complicated tracking system are required
Solution Approach 1:
The system uses resonant oscillations at specific frequencies to enable energy transfer. By tuning the resonators to match frequencies, the system achieves directed energy transfer through resonant coupling without requiring mechanical tracking systems or line-of-sight constraints, as the resonant fields naturally guide the energy transfer
Solution Approach 2:
The system changes the operating parameters by using resonant frequencies and coupling rates rather than continuous directed radiation. By adjusting the resonant frequencies and coupling strengths of the resonators, efficient energy transfer is achieved without requiring complex tracking mechanisms or uninterrupted line-of-sight
3Reliability
If induction-based transfer schemes are used, then energy transfer is achieved, but the transfer is restricted to very close-range or low power
Solution Approach 1:
Instead of using traditional induction-based close-range transfer, the system inverts the approach by using resonant coupling at higher frequencies with intermediate resonators. This inversion of the traditional induction method enables energy transfer over extended distances while maintaining reliability, overcoming the close-range limitation of conventional induction schemes
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables efficient wireless energy transfer with reduced radiation losses and fewer interactions with extraneous objects, achieving higher efficiency and longer range than traditional methods.
Implementation Method 1
transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is κ1B
Implementation Method 2
a first resonator structure to an intermediate resonator structure... transferring energy wirelessly from the intermediate resonator structure to a second resonator structure
Data Source
Figure 1
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AI summary
Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is ?1 B , transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is ? B 2 and during the wireless energy transfers, adjusting at least one of the coupling rates ?1 B and ? B 2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.