Wireless Power Coil Unit Fixed Base Member Design
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Solution Overview
Problem
In wireless power transmission, variations in the distance between the power transmission coil and the magnetic body lead to fluctuations in coil properties, resulting in decreased power transmission performance, especially when trying to minimize the thickness and size of the coil unit.
Innovation Solution
A coil unit design that includes a spiral-wound conductive wire coil, a magnetic body, and a base member, where the coil and magnetic body are fixed to the base member, minimizing variations in distance and properties through a structured accommodating system that prevents dispersion and maintains consistent magnetic symmetry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the coil and magnetic body are accommodated in an accommodating case with a spacer region, then the thickness and size of the coil unit are reduced, but dispersion in the distance between the power transmission coil and the magnetic body occurs, causing variation in coil properties and decreased power transmission performance
Solution Approach 1:
The accommodating case is divided into a coil accommodating section and a magnetic body accommodating section, with the coil and magnetic body fixed in their respective sections. This segmentation prevents relative displacement between components while maintaining compact dimensions, resolving the contradiction between size reduction and performance stability.
Solution Approach 2:
The coil and magnetic body are pre-fixed to the base member within the accommodating case before assembly. This preliminary fixation ensures that the distance between the coil and magnetic body remains constant during operation, preventing dispersion and maintaining power transmission performance despite the reduced overall size.
2Length of stationary object
If the distance between the power transmission coil and the magnetic body is minimized to reduce thickness, then the size of the coil unit is reduced, but variation in coil properties increases due to manufacturing dispersion
Solution Approach 1:
The coil and magnetic body are pre-fixed to the base member at predetermined positions within the accommodating case. This preliminary action establishes a fixed reference frame that eliminates manufacturing dispersion in the distance between components, enabling thin design without sacrificing precision.
Solution Approach 2:
The base member acts as an intermediary structure that mechanically couples the coil and magnetic body at fixed positions. This intermediary component ensures consistent spacing between the coil and magnetic body while allowing the overall unit thickness to be minimized, resolving the contradiction between thin design and manufacturing precision.
3Ease of manufacture
If the coil and magnetic body are fixed using filler in a coil positioning groove section, then assembly is simplified, but dispersion in distance between components occurs, causing variation in coil properties
Solution Approach 1:
The accommodating case is segmented into distinct coil accommodating section and magnetic body accommodating section, with each component fixed in its designated section. This segmentation provides precise positioning for both components, eliminating the distance dispersion that occurs with filler-based fixation while maintaining ease of assembly through modular construction.
Solution Approach 2:
The base member serves as an intermediary structure that provides fixed mounting positions for both the coil and magnetic body. This intermediary component enables simple assembly through fixed positioning features while simultaneously ensuring consistent distance between components, resolving the contradiction between ease of manufacture and compositional stability.
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 design effectively minimizes variations in coil properties, enhancing the stability and performance of wireless power transmission by maintaining a consistent distance between the coil and magnetic body, thereby improving power transmission efficiency.
Implementation Method 1
The wireless power transmission technology transmits electric power wirelessly using an electromagnetic induction mechanism between a primary (power transmission) coil and a secondary (power receiving) coil. The wireless power transmission technology uses linkage of an alternating magnetic flux generated in a power transmission-side coil to a power receiving-side coil.
Data Source
AI summary
A coil unit includes a coil configured by winding a conductive wire in a spiral shape, a magnetic body, and a base member disposed between the coil and the magnetic body, wherein the coil and the magnetic body are fixed to the base member.