Wireless Power Shielding Unit for Magnetization Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing wireless charging systems using permanent magnets suffer from reduced performance and transmission efficiency due to magnetization of the magnetic field shielding sheets by time-invariant magnetic fields, which can lead to deteriorated antenna performance and failure in normal operation.
Innovation Solution
A shielding unit for wireless power transfer modules is introduced, featuring a magnetic field shielding sheet with a magnetic body receiving portion that minimizes contact between the magnetic body and the shielding sheet, allowing the magnetic field to be induced and directed externally, thereby reducing magnetization and enhancing charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the magnetic body is attached to the magnetic field shielding sheet, then alignment of the wireless power transmission module and reception module is achieved, but the area A adjacent to the magnetic body becomes magnetized, lowering transmission efficiency
Solution Approach 1:
By segmenting the shielding structure into multiple sheets with the magnetic body positioned between them, the patent creates distinct magnetic zones that maintain alignment capability while preventing the formation of a large magnetized area that would reduce transmission efficiency.
Solution Approach 2:
The magnetic body is strategically positioned between two shielding sheets rather than attached to one, creating a localized magnetic field configuration that maintains alignment function while minimizing the extent of magnetization in any single area, thereby preserving transmission efficiency.
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 improves transmission efficiency by reducing the impact of time-invariant magnetic fields on the shielding sheets, maintaining desired shielding performance even near the magnetic body, and allows for thinner module designs while meeting wireless charging system requirements.
Implementation Method 1
a magnetic field shielding sheet for shielding a magnetic field generated by a wireless signal getting out from the antenna unit and condense the magnetic field in a desired direction
Implementation Method 2
a magnetic body for inducing magnetic force lines generated from the permanent magnet
Data Source
AI summary
A shielding unit for a wireless power transfer module and the wireless power transfer module including the same are provided. The shielding unit for the wireless power transfer module according to an embodiment of the present invention comprises a magnetic field shielding sheet for shielding a magnetic field generated in a predetermined frequency band and condensing the same in a desired direction, and a magnetic body receiving portion which is formed through the magnetic field shielding sheet such that a magnetic body for including magnetic force lines generated from a permanent magnet can be inserted therein, wherein the magnetic body receiving portion is arranged to have a relatively larger size than the magnetic body.