Shielding Units for Inductive Energy Coils
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Solution Overview
Problem
Inductive charging systems often interfere with internal components of devices due to magnetic fields, causing damage from heat and high power levels, particularly when the receiver coil is smaller or differently shaped than the transmitter coil, leading to unintended magnetic field penetration.
Innovation Solution
An additional shielding unit with openings is placed around the inductive energy receiver coil, allowing it to be partially revealed for energy transmission while preventing magnetic field penetration, using ferromagnetic or magnetically conductive materials to protect internal components and form a controlled magnetic field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a complete shielding unit is placed around the inductive energy coil, then internal components are protected from magnetic interference, but electromagnetic radiation is blocked and energy transmission is prevented
Solution Approach 1:
The shielding unit is segmented by incorporating openings that reveal portions of the inductive energy coil. This segmentation allows the shield to protect against magnetic interference in covered areas while permitting electromagnetic radiation through the openings, thus resolving the contradiction between protection and energy transmission.
Solution Approach 2:
The shielding unit applies different properties to different locations: areas with openings allow electromagnetic radiation for energy transmission, while areas without openings provide magnetic shielding protection. This local differentiation enables simultaneous achievement of both protection and energy transmission functions.
2Volume of moving object
If the receiver coil is made smaller to fit device constraints, then device size is reduced, but magnetic field penetration increases causing interference with internal components
Solution Approach 1:
The shielding unit acts as an intermediary element positioned between the receiver coil and internal components. It mediates the magnetic field interaction by blocking harmful magnetic field penetration to components while allowing the coil to maintain its smaller size for device compactness.
3Productivity
If the coil size and shape are optimized for energy reception, then energy transfer efficiency is improved, but shielding design becomes complex and difficult
Solution Approach 1:
The shielding unit is designed as a universal structure that can accommodate different coil sizes and shapes while maintaining its protective function. The openings are configured to reveal the coil regardless of its specific dimensions, simplifying the shielding design process and reducing complexity.
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 effectively shields internal components from magnetic interference, allowing inductive energy transfer without damaging device internals, regardless of coil size or shape, and simplifies coil design by decoupling coil dimensions from shielding considerations.
Implementation Method 1
using ferromagnetic or magnetically conductive materials to protect internal components and form a controlled magnetic field
Implementation Method 2
Inductive charging uses an electromagnetic field to transfer energy wirelessly between two objects
Implementation Method 3
the opening at least partially reveals the inductive energy coil electromagnetic radiation
Implementation Method 4
The interference may be caused by heat generated by eddy currents or by high power level
Data Source
AI summary
The invention relates to protecting metals and components from inductive energy. The protecting apparatus comprises an inductive energy coil (51), a first shielding unit comprising an opening (58) around the inductive energy coil (51) wherein the first shielding unit (54) is located in parallel to inductive energy coil (51); and a second shielding unit (53) under the inductive energy coil (51) so that the inductive energy coil (51) is enabled for electromagnetic radiation. The invention further relates to a method for producing the protecting apparatus and an electronic device comprising the protecting apparatus.