Wireless Power Coupling With Magnetic Flux Guidance for Coil Misalignment
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Solution Overview
Problem
Existing wireless charging systems for devices like electric vehicles require precise alignment of charger and receiver coils, leading to high position dependency, efficiency losses, and excessive electromagnetic emissions, making them inefficient and unsafe for use.
Innovation Solution
The system incorporates field guiding and magnetic coupling techniques with extended magnetic layers to create a low reluctance path for magnetic flux, allowing for flexible positioning and reduced EM emissions, while using crossed charger and receiver coil geometries to enhance power transfer efficiency and tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If precise alignment of charger and receiver coils is required, then power transfer efficiency is improved, but position dependency increases and ease of operation deteriorates
Solution Approach 1:
The patent transitions from traditional planar coil alignment to three-dimensional magnetic field coupling. By using extended magnetic layers and crossed coil geometries, the system creates magnetic coupling in multiple spatial dimensions, allowing power transfer efficiency to be maintained across a broader range of positions and orientations.
Solution Approach 2:
The system employs dynamically adjustable magnetic coupling through extended magnetic layers that can adapt to different positioning scenarios. The magnetic field distribution is optimized in real-time to maintain efficient power transfer regardless of receiver position, making the system dynamic rather than static in its alignment requirements.
2Loss of energy
If precise alignment of charger and receiver coils is required, then power transfer efficiency is improved, but electromagnetic emissions increase
Solution Approach 1:
The patent implements localized magnetic field confinement through extended magnetic layers positioned strategically around the coils. These layers create regions of concentrated magnetic flux that guide the field along desired paths, preventing electromagnetic emissions from propagating broadly while maintaining efficient local coupling between charger and receiver.
Solution Approach 2:
Extended magnetic layers serve as intermediary structures between the charger and receiver coils. These layers mediate the magnetic coupling process by providing controlled flux paths, reducing the need for direct coil-to-coil alignment and thereby decreasing electromagnetic emissions while maintaining power transfer efficiency.
3Device complexity
If traditional coil alignment is used, then system complexity is reduced, but susceptibility to metal interference increases
Solution Approach 1:
The patent employs composite magnetic structures combining extended magnetic layers with traditional coil assemblies. These composite structures create distributed magnetic coupling that is less susceptible to disruption from metal objects, as the interference would need to affect multiple distributed coupling points simultaneously rather than a single alignment-critical interface.
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 results in higher efficiency, lower EM emissions, and safer operation by allowing for flexible positioning and reduced susceptibility to metal interference, meeting regulatory guidelines and improving power transfer across a range of alignments.
Implementation Method 1
field guiding and magnetic coupling techniques with extended magnetic layers to create a low reluctance path for magnetic flux
Implementation Method 2
field guiding and magnetic coupling techniques with extended magnetic layers to create a low reluctance path for magnetic flux
Implementation Method 3
wireless charging or power supply to one or many receivers placed on or near a wireless charger or power supply
Data Source
AI summary
In accordance with various embodiments, described herein are systems and/or methods for enabling efficient wireless power transfer and charging of devices and/or batteries, including in some embodiments freedom of placement of the devices and/or batteries in one or multiple (e.g. one, two or three) dimensions, and/or improved features such as ease of use and compatibility. Exemplary applications include beam inductive or magnetic charging and power for use in, e.g., mobile, electronic, electric, lighting or other devices, machines, batteries, power tools, kitchen, military, medical, industrial tools or systems, robots, trains, buses, trucks and/or vehicles, and other environments.