Slanted Wireless Power Coil for Foreign Object Removal
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Solution Overview
Problem
Metallic foreign objects can intrude between the power-supplying coil and the power-receiving coil during wireless power transmission, leading to efficiency degradation when the vehicle moves before stopping in the designated area, as previously proposed solutions do not effectively prevent foreign object intrusion before the vehicle is stationary.
Innovation Solution
The power-supplying coil is installed in a slanted state relative to the horizontal plane, either within a groove or in a container with a fluororesin coating, micro projections, or grooves, ensuring that metallic foreign objects slide down due to gravity, preventing them from obstructing the power transmission path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the power-supplying coil is installed horizontally, then installation simplicity is improved, but metallic foreign objects can remain on the coil surface and degrade power transmission efficiency
Solution Approach 1:
The invention inverts the conventional horizontal installation orientation by positioning the power-supplying coil in a slanted state. This inversion allows gravity to naturally remove foreign objects from the coil surface, preventing energy loss due to foreign object interference while maintaining practical installation feasibility through groove structures or support blocks.
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 ensures constant and efficient wireless power transmission by preventing metallic foreign objects from remaining between the coils, maintaining high transmission efficiency even when the vehicle moves into the power transmission area.
Implementation Method 1
a power-supplying coil installed in a slanted state or perpendicularly to a horizontal plane and configured to form an electromagnetic coupling circuit along with a power-receiving coil provided in the vehicle
Implementation Method 2
The power-supplying coil is installed in a slanted state relative to the horizontal plane, either within a groove or in a container with a fluororesin coating, micro projections, or grooves, ensuring that metallic foreign objects slide down due to gravity
Data Source
AI summary
A wireless power transmission device includes a power-supplying coil configured to wirelessly transmit power to an electric vehicle (EV) serving as a vehicle, be installed in a slanted state or perpendicularly to a horizontal plane, and form an electromagnetic coupling circuit along with a power-receiving coil provided in the EV.