Coil Holder Integrating Wire Guidance and Shielding
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Solution Overview
Problem
Existing coil devices for wireless power transfer require additional components and increased part counts to adjust conductive wire winding, leading to larger device sizes and potential magnetic flux interference, which complicates power feeding performance.
Innovation Solution
The coil device incorporates a holder with integrated first and second grooves that allow the conductive wire to be wound and adjusted without additional components, using a second path intersecting the wound wire direction to select desired inductance and reduce part count, while a nonmagnetic member shields excess wire to prevent magnetic flux interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional components (guide portions, hooks, holding portions) are provided for conductive wire winding adjustment, then winding adjustment capability is improved, but device complexity and part count increase
Solution Approach 1:
The holder integrates multiple functions: it holds the core, guides the conductive wire through integrated guide portions, and provides holding portions for securing the wire ends - all as a single component. This merging of functions reduces the total number of separate parts while maintaining full winding adjustment capability.
Solution Approach 2:
The holder is designed as a multi-functional component that simultaneously serves as a core support structure, a wire guidance system, and a wire securing mechanism. This universal design allows one component to perform multiple roles that would traditionally require separate parts.
2Reliability
If extra length absorbing devices (hooks, holding portions) are added to absorb conductive wire length changes, then inductance stability is improved, but device complexity increases
Solution Approach 1:
The holder integrates the extra length absorption function into its structure through guide portions and holding portions, eliminating the need for separate extra length absorbing devices. The same components that guide the wire also absorb length variations.
3Device complexity
If the holder structure is simplified to reduce part count, then device complexity is reduced, but winding adjustment capability may be compromised
Solution Approach 1:
The holder combines core support, wire guidance, and wire securing functions into a single integrated structure, maintaining full winding adjustment capability while reducing part count.
Solution Approach 2:
The holder is designed as a multi-functional component that performs multiple roles (support, guide, secure) simultaneously, ensuring that simplification does not compromise functionality.
4Object-affected harmful factors
If nonmagnetic member is added to shield excess wire, then magnetic flux interference is reduced, but device complexity increases
Solution Approach 1:
The patent acknowledges that excess wire length is inevitable due to manufacturing variations, but instead of trying to eliminate it, the nonmagnetic member shields the excess wire to convert the potential harmful magnetic flux into a neutral or beneficial effect, stabilizing inductance.
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 configuration allows for compact, efficient winding adjustments within the holder, reducing the number of parts and minimizing magnetic flux impact on power transfer, thereby enhancing the stability and efficiency of wireless power transfer systems.
Implementation Method 1
The wireless power transfer system realizes wireless power transmission by using inter-coil magnetic coupling such as electromagnetic induction and magnetic field resonance methods
Implementation Method 2
a nonmagnetic member holding the conductive wire in such a way that a second path connects a peripheral edge portion of the holder and an outermost first path closest to the peripheral edge portion among the plurality of first paths
Data Source
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AI summary
A coil device is provided with a coil and a holder which holds the coil. The coil is formed by a conductive wire being wound in a wound wire direction and includes a plurality of turns that are adjacent in a direction intersecting the wound wire direction. The holder includes a plurality of first holding portions that hold the conductive wire in such a way that the conductive wire passes along a plurality of first paths corresponding to the plurality of turns, and at least one second holding portion which holds the conductive wire in such a way that the conductive wire passes along a second path extending in a direction intersecting the wound wire direction and connecting the first paths.