Wireless Power Resonator Parallel Wiring for Efficiency
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Solution Overview
Problem
Conventional wireless power transmission systems using resonant magnetic coupling face challenges in maintaining high transmission efficiency when the sizes of power-transmitting and power-receiving resonators are significantly different, often requiring excessive wiring length.
Innovation Solution
The system employs a parallel wiring structure for inductors with the power-receiving resonator having a greater number of parallel wires and reduced resistance, particularly in the inner parts, to maintain high efficiency without increasing overall wiring length, along with impedance matching to optimize power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the sizes of power-transmitting and power-receiving resonators are significantly different, then power transmission efficiency deteriorates, but increasing the overall length of wiring to avoid this difficulty leads to wasteful use of materials and increased cost
Solution Approach 1:
The patent applies local quality by making the wiring structure non-uniform: the power-receiving resonator uses parallel wiring in regions where eddy currents are generated, while the power-transmitting resonator uses conventional single wiring. This localized application of parallel wiring specifically addresses the efficiency problem in the power-receiving resonator without unnecessarily increasing overall wiring material usage.
Solution Approach 2:
The patent changes the wiring configuration parameter from single wire to parallel wires in specific regions. By changing the wiring structure to parallel configuration in the power-receiving resonator, the effective resistance is reduced and eddy current effects are minimized, thereby improving power transmission efficiency without requiring excessive wiring length.
2Loss of energy
If parallel wiring structure is used to reduce resistance and improve efficiency, then power transmission efficiency improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by making the wiring structure non-uniform: the power-receiving resonator uses parallel wiring in regions where eddy currents are generated, while the power-transmitting resonator uses conventional single wiring. This localized application of parallel wiring specifically addresses the efficiency problem in the power-receiving resonator without unnecessarily increasing overall wiring material usage.
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 allows for high transmission efficiency with reduced wiring length, saving resources and space, while minimizing conductor loss and eddy current effects, thereby enhancing the system's efficiency and cost-effectiveness.
Implementation Method 1
a resonant magnetic coupling method has been proposed... resonant mode coupling between resonant antennas is used to realize longer range and higher efficiency power transmission
Implementation Method 2
the conventional one that uses electromagnetic induction
Implementation Method 3
minimizing conductor loss and eddy current effects
Data Source
Figure 1~2
Figure 3
Figure 4(a)~5(c)
AI summary
A wireless power transmission system is designed to transmit power between a power-transmitting resonator 105 and a power-receiving resonator 107, which are implemented as inductors LL and Ls of mutually different sizes, by a non-contact method over a resonant magnetic field with a resonant frequency f0. When measured at the resonant frequency f0, the resistance value Rs per unit length of at least a part of wiring that forms the smaller inductor Ls is lower than that (RL) of wiring that forms the other larger inductor LL.