Wireless Power Receiving Coil Layout for Narrow Housing Gaps
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Solution Overview
Problem
Wireless power supply systems are restricted by the shape of the housing containing the coil parts, which reduces power supply efficiency.
Innovation Solution
A coil device with a conductive wire wound around a core space, featuring a first and second coil portion along the coil axis, where the outer width of the first coil portion is smaller than the second when viewed perpendicular to the coil axis, allowing it to conform to varying housing widths and increase magnetic flux.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coil part is disposed inside a housing with fixed shape, then the housing provides structural support and protection, but the power supply efficiency is reduced due to restricted coil positioning
Solution Approach 1:
The coil part is divided into multiple coil portions (first coil portion and second coil portion) with different outer widths, allowing each segment to be positioned at different distances from the housing wall, thereby optimizing power supply efficiency while maintaining structural support
Solution Approach 2:
Different portions of the coil part have different outer widths to match the local space constraints and optimization needs at different positions along the coil axis, enabling efficient power transmission while adapting to the housing structure
2Productivity
If the coil part is positioned closer to the housing wall, then the interval between coil parts is reduced improving power supply efficiency, but the housing shape restricts the coil disposition
Solution Approach 1:
The coil part features asymmetric dimensions with different outer widths at different portions, breaking the symmetry constraint and allowing flexible adaptation to various housing shapes while maintaining optimal positioning for power supply efficiency
Solution Approach 2:
The coil part utilizes the axial dimension by arranging multiple coil portions with different outer widths along the coil axis, transforming a two-dimensional positioning problem into a three-dimensional solution that accommodates housing shape constraints
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
Prevents restriction by housing shape and enhances power supply efficiency by increasing magnetic flux and reducing the interval between coil parts.
Implementation Method 1
a coil part having a conductive wire wound around a core space extending along a coil axis, the coil part being configured to transmit or receive power to or from a counterpart coil part of the counterpart coil device
Data Source
AI summary
A power-receiving coil device is installed inside an exposed part housing. The power-receiving coil device includes a power-receiving-side coil part that receives power from a power-transmitting-side coil part of a power-transmitting coil device, and a power-receiving-side core magnetic body. The power-receiving-side coil part has a first power-receiving coil and a second power-receiving coil which are arranged along a direction of a coil axis. An outer width of the first power-receiving coil is smaller than an outer width of the second power-receiving coil when viewed along a front-back direction perpendicular to the coil axis.