Magnetic Shield Segmentation for Wireless Power Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing magnetic field shielding technologies face challenges in achieving perfect shielding due to the need for method customization based on device type and structure, particularly in reducing the strength of leaked magnetic fields during wireless power transmission.
Innovation Solution
A magnetic field shielding apparatus is designed with a combination of closed and open regions, utilizing magnetic shielding materials with varying permeabilities in a multilayer structure to control the path of magnetic fields, ensuring that leaked fields are either absorbed or redirected inside the apparatus without interfering with the intended energy transmission between an energy transmitter and receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If magnetic field shielding materials are used to block leaked magnetic fields, then the strength of leaked magnetic fields is reduced, but the complexity of the shielding apparatus structure increases
Solution Approach 1:
The magnetic shield is divided into multiple closed regions (first closed region, second closed region, third closed region) that are spatially segmented to handle different portions of leaked magnetic fields. Each closed region is positioned at specific locations around the energy receiver to provide targeted shielding without requiring a complete enclosing structure.
Solution Approach 2:
Magnetic shielding materials are selectively placed only in regions where leaked magnetic fields are detected, rather than enclosing the entire system. The closed regions are positioned specifically at locations where magnetic field leakage occurs, providing localized shielding that reduces overall material usage and structural complexity.
2Productivity
If magnetic shielding materials with high permeability are used to absorb leaked magnetic fields, then the efficiency of wireless energy transmission is improved, but the cost of materials and manufacturing increases
Solution Approach 1:
Instead of using magnetic shielding materials throughout the entire transmission path, the invention applies shielding materials only in specific closed regions where leaked magnetic fields are most problematic. This partial application provides sufficient shielding effect to improve transmission efficiency while significantly reducing material costs compared to complete coverage.
Solution Approach 2:
The magnetic shield structure combines magnetic shielding materials with non-magnetic support structures or housing materials. This composite approach allows the use of expensive magnetic materials only where needed for shielding, while cheaper materials are used for structural support, reducing overall manufacturing cost.
3Object-affected harmful factors
If a complete enclosing structure is used to shield magnetic fields, then shielding effectiveness is maximized, but the space available for energy transmission and device placement is reduced
Solution Approach 1:
The shielding structure is segmented into discrete closed regions positioned at specific locations around the energy receiver, rather than forming a complete enclosure. This segmentation allows magnetic fields to pass through open areas where energy transmission is needed, while still providing shielding where leakage occurs.
Solution Approach 2:
Open regions are intentionally created in the magnetic shield structure at locations where energy transmission paths need to remain unobstructed. These open regions extract or remove the shielding function from critical transmission areas, allowing energy to pass through while maintaining shielding effectiveness in other areas.
4Adaptability or versatility
If magnetic field shielding is implemented for all device types, then universal protection is achieved, but the adaptability to specific device structures is reduced
Solution Approach 1:
The magnetic shield structure with multiple closed regions can be applied to various wireless power transmission device configurations without requiring complete redesign. The modular closed regions can be positioned and configured to match different device geometries and magnetic field leakage patterns, providing universal applicability across device types.
Solution Approach 2:
The magnetic shielding apparatus is designed with adjustable or reconfigurable closed regions that can be positioned at different locations depending on the specific device structure being protected. This dynamic positioning capability allows the same shielding structure to adapt to different device types and configurations.
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 effectively reduces the strength of leaked magnetic fields, enhancing the efficiency of wireless energy transmission while protecting ambient devices and users from unwanted magnetic field exposure.
Implementation Method 1
magnetic field shielding technology for reducing a strength of a leaked magnetic field by shielding unnecessary magnetic fields generated from magnetic field sources having various shapes and structures
Implementation Method 2
utilizing magnetic shielding materials with varying permeabilities in a multilayer structure to control the path of magnetic fields
Data Source
AI summary
Disclosed is a magnetic field shielding apparatus including an energy transmitter configured to generate a magnetic field, an energy receiver configured to receive the magnetic field generated by the energy transmitter, and a magnetic shield configured to shield a leaked magnetic field that is not received by the energy receiver, the magnetic shield including at least one closed region through which the leaked magnetic field passes, and at least one open region including a protrusion through which the leaked magnetic field moves to an inside of the magnetic field shielding apparatus after absorbed into the closed region.