Adjustable Resonance Coil Diameter for Wireless Power Efficiency
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Solution Overview
Problem
Magnetic resonance power transmission systems face efficiency degradation due to varying distances between the power transmitter and receiver, as the optimal resonance coil diameter for efficient power transfer depends on the distance, and existing technologies lack adaptive solutions for maintaining high efficiency across different distances.
Innovation Solution
A power transmission system that includes a power transmitting apparatus with multiple resonance coils of different diameters, selectively coupled through electromagnetic induction, and a position control apparatus to align the axial directions of the coils optimally, ensuring efficient power transfer regardless of the distance between the transmitter and receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a resonance coil with a small diameter is used, then transmission efficiency is high at short distances, but transmission efficiency degrades at long distances
Solution Approach 1:
The patent applies the dynamics principle by making the resonance coil diameter adjustable rather than fixed. The system can dynamically switch between different coil configurations (single coil, multiple coils in parallel, or multiple coils in series) based on the transmission distance, allowing the effective coil diameter to adapt to different operating conditions and maintain high transmission efficiency across varying distances
Solution Approach 2:
The patent implements parameter changes by varying the effective diameter of the resonance coil according to transmission distance. By changing the configuration (single/coil, parallel/coils, series/coils), the system alters the coil diameter parameter to match the optimal value for the current transmission distance, thereby resolving the contradiction between short-distance and long-distance efficiency
2Loss of energy
If a resonance coil with a large diameter is used, then transmission efficiency is high at long distances, but transmission efficiency degrades at short distances
Solution Approach 1:
The system dynamically adjusts the effective coil diameter by switching between different coil configurations. When long-distance transmission is required, larger diameter coils are activated; when short-distance transmission is needed, smaller diameter coils or single coils are used, making the system adaptable to varying distance requirements while maintaining efficiency
Solution Approach 2:
The effective diameter parameter of the resonance coil is changed based on transmission distance requirements. The system selects appropriate coil configurations (single, parallel, or series arrangements) to set the coil diameter to an optimal value for the current operating distance, resolving the contradiction between long-distance and short-distance performance
3Adaptability or versatility
If multiple resonance coils are provided to cover different distances, then distance adaptability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing multiple resonance coils that can serve different functions depending on configuration. The same set of coils can be arranged in single, parallel, or series configurations to handle different transmission distances, making the system multi-functional without requiring completely separate coil sets for each distance range
Solution Approach 2:
The patent segments the resonance coil system into multiple independent coils that can be selectively activated and configured. By dividing the overall transmission function across multiple segmentable coils, the system achieves distance adaptability while managing complexity through modular design and selective activation of only the necessary coils for each operating condition
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 solution allows for highly efficient power transmission by selecting the appropriate resonance coil diameter based on the distance, maintaining high efficiency even when the distance between the transmitter and receiver is not constant, thereby overcoming the limitations of existing systems.
Implementation Method 1
a plurality of resonance coils having respective, different diameters one of which is selectively coupled to the first coil through electromagnetic induction
Implementation Method 2
magnetic resonance power transmission technology that uses magnetic resonance to transmit power
Data Source
AI summary
A power transmitting apparatus includes a power transmission or reception circuit, a first coil connected to the power transmission or reception circuit through wires, a plurality of resonance coils having respective, different diameters one of which is selectively coupled to the first coil through electromagnetic induction, and a position control apparatus configured to control the positions of the resonance coils, wherein the position control apparatus is configured to selectively align an axial direction of one of the resonance coils with an axial direction of the first coil.