Wireless Charging Coil-Core Gap Filling for Compact Power Transfer
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Solution Overview
Problem
Conventional wireless power-charging modules face challenges in increasing magnetic coupling coefficient and induced voltage, making it difficult to achieve high power charging efficiency and compact size due to the limitations of magnetic core size and structure.
Innovation Solution
Incorporating a magnetic element, such as magnetic glue or tape, between the magnetic core and coil, which enhances magnetic field strength and charging efficiency by ensuring strong magnetic coupling, allowing for miniaturization and improved power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic core dimensions are increased to improve magnetic coupling coefficient and induced voltage, then the power charging efficiency is improved, but the device size increases and miniaturization becomes difficult
Solution Approach 1:
The patent applies local quality by introducing a magnetic element with high magnetic permeability at the specific location between the magnetic core and coil. This localized enhancement of magnetic properties improves the magnetic coupling coefficient and induced voltage without requiring an overall increase in magnetic core dimensions, thus maintaining compact device size while improving power charging efficiency.
Solution Approach 2:
The patent changes the magnetic permeability parameter by introducing a magnetic element with higher magnetic permeability than the conventional magnetic core material. This parameter change enhances the magnetic field strength and coupling efficiency, allowing for improved power transfer without increasing the physical dimensions of the magnetic core, thereby resolving the contradiction between efficiency and size.
2Volume of moving object
If the magnetic core dimensions are reduced for miniaturization, then the device size is decreased, but the magnetic coupling coefficient and induced voltage decrease
Solution Approach 1:
The patent compensates for the reduced magnetic core dimensions by introducing a magnetic element with high magnetic permeability in the gap between the magnetic core and coil. This localized magnetic enhancement maintains the magnetic coupling coefficient and induced voltage at acceptable levels even when the overall device size is reduced, enabling miniaturization without sacrificing coupling efficiency.
Solution Approach 2:
The patent creates a composite magnetic structure by combining the magnetic core with a magnetic element (such as ferrite, ferrite alloy, amorphous alloy, or nanocrystalline alloy) that has superior magnetic properties. This composite approach allows the system to achieve high magnetic coupling in a compact form factor, resolving the contradiction between miniaturization and maintaining adequate coupling coefficient.
3Reliability
If a magnetic element is added between magnetic core and coil to enhance magnetic coupling, then the induced voltage and charging efficiency are improved, but the device complexity increases
Solution Approach 1:
The patent introduces a magnetic element as an intermediary component between the magnetic core and the coil. This intermediary enhances the magnetic coupling and induced voltage by providing a high permeability path for magnetic flux. While it adds a component, the magnetic element serves a specific functional purpose that justifies the added complexity by significantly improving power transfer efficiency.
Solution Approach 2:
The patent changes the magnetic permeability parameter in the gap between core and coil by introducing the magnetic element. This parameter change directly improves the magnetic coupling and induced voltage. The added complexity is offset by the significant improvement in electrical performance, making the enhanced induced voltage achievable only through this parameter modification.
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
The solution significantly increases the induced voltage and charging efficiency while enabling the miniaturization of the wireless power-charging module, addressing the limitations of conventional designs.
Implementation Method 1
the coil 12 of the wireless power charging receiver 10 can generate an induced voltage for charging the battery B
Implementation Method 2
Incorporating a magnetic element, such as magnetic glue or tape, between the magnetic core and coil, which enhances magnetic field strength and charging efficiency by ensuring strong magnetic coupling
Data Source
AI summary
A wireless power-charging module is provided, including a magnetic core, a coil, and a magnetic element, wherein a gap is formed between the magnetic core and the coil. The coil and the magnetic element are disposed on the surface of the magnetic core, wherein the magnetic element is disposed between the gap between the magnetic core and the coil.