Wireless Power Coil Positioning for Foreign Object Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power supply systems are insufficient in removing foreign objects from the space between the power supply coil and the power receiving coil, especially when a vehicle is not present, as they cannot change the position of the power supply coil to prevent foreign objects from adhering to it.
Innovation Solution
A wireless power supply device with a position setting member that sets the power supply coil to a vertical position when a vehicle is not present and changes to a horizontal position upon detection of the vehicle entry, using a moving body sensor, support mechanism, and actuator to ensure efficient foreign object removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the power supply coil is kept in a horizontal position for power supply, then power transfer efficiency is improved, but foreign objects can adhere to the coil surface when no vehicle is present
Solution Approach 1:
The power supply coil is designed to dynamically change its position between horizontal and vertical states based on vehicle presence. When a vehicle is detected, the coil rotates to horizontal position for efficient power transfer. When no vehicle is present, it rotates to vertical position to prevent foreign object adhesion, thus adapting to different operational requirements
Solution Approach 2:
The system changes the spatial orientation parameter of the power supply coil from horizontal to vertical position based on vehicle detection status. This parameter change allows the coil to maintain optimal orientation for power transfer during operation while preventing foreign object accumulation during idle periods
2Object-affected harmful factors
If a separator material is used to prevent foreign object intrusion, then foreign object prevention is improved, but the system cannot remove foreign objects that fall on the separator material
Solution Approach 1:
The rotatable power supply coil mechanism provides active foreign object removal capability by rotating from horizontal to vertical position, allowing gravity to cause foreign objects to fall off the coil surface. This dynamic position change enables the system to both prevent and remove foreign objects, overcoming the limitation of static separator materials
Solution Approach 2:
The system uses the gravitational force that causes foreign objects to adhere during horizontal operation as a beneficial force for removal during vertical operation. By rotating to vertical position, the same gravity that causes adhesion now facilitates removal, converting a harmful effect into a useful function
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 solution allows for reliable removal of foreign objects by maintaining the power supply coil in a vertical position until a vehicle enters, preventing foreign objects from adhering and enabling efficient power transfer once the coil is horizontally positioned.
Implementation Method 1
causing an upper surface of a power supply coil that is provided in an electric power supply space to face a power receiving coil that is provided in the vehicle, and by electromagnetically coupling the power supply coil with the power receiving coil
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A wireless power supply device, which supplies electric power to a movable body (M) by causing an end surface of a power supply coil (1a) that is provided in an electric power supply space to face a power receiving coil that is provided in the movable body, and by electromagnetically coupling the power supply coil (1a) with the power receiving coil, includes a position setting member configured to set the end surface (1f) of the power supply coil (1a) in a vertical position in a state of not detecting entry of the movable body (M) into the electric power supply space, and to cause a position of the end surface (1f) of the power supply coil (1a) to change from the vertical position to a horizontal position upon detecting entry of the movable body (M) into the electric power supply space.