Wireless Power Transmitter Mobile Member for Foreign Object Removal
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Solution Overview
Problem
In wireless power transmission systems, metal foreign objects between the power transmitting and receiving coils can heat up due to magnetic fields, posing safety concerns and complicating removal.
Innovation Solution
A method involving a mobile member that moves metal foreign objects from overlapping to non-overlapping positions with respect to the power transmitting coil before power transmission begins, ensuring the objects do not heat up during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a metal foreign object is present between the power transmitting coil and power receiving coil, then power transmission can proceed, but the surface temperature of the metal foreign object increases due to magnetic field heating
Solution Approach 1:
The mobile member performs preliminary action by moving metal foreign objects from the overlapping position to a non-overlapping position before the power transmitting coil begins power transmission. This preventive measure eliminates the harmful heating effect before it can occur, while allowing power transmission to proceed normally.
Solution Approach 2:
The mobile member acts as an intermediary between the metal foreign object and the power transmitting coil. It detects the presence of metal foreign objects and physically moves them away from the overlapping region, mediating the interaction to prevent harmful heating while maintaining power transmission functionality.
2Reliability
If the mobile member moves metal foreign objects away from the overlapping position before power transmission, then safety improves by preventing heating, but device complexity increases
Solution Approach 1:
The mobile member operates autonomously to detect and remove metal foreign objects without requiring external intervention. It self-services the system by continuously monitoring the overlapping region and automatically moving detected metal objects away, improving safety without requiring complex external control systems.
Solution Approach 2:
The mobile member changes its position parameter dynamically - moving from a stationary state to an active moving state when metal foreign objects are detected. This parameter change enables the system to maintain simplicity during normal operation while activating the safety function only when needed.
3Reliability
If the mobile member continuously monitors and moves metal foreign objects, then safety is maintained, but energy consumption increases
Solution Approach 1:
The mobile member performs periodic monitoring and movement actions rather than continuous operation. It detects metal foreign objects at specific intervals or triggers and only activates when needed, maintaining safety while minimizing unnecessary energy consumption during periods when no foreign objects are present.
Solution Approach 2:
The mobile member performs rapid detection and removal actions when metal foreign objects are detected, rushing through the safety check and removal process efficiently. This skipping approach minimizes the time the mobile member is active, reducing energy consumption while maintaining safety through quick intervention when needed.
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 approach enhances safety by preventing the surface temperature of metal foreign objects from increasing, thereby improving the safety and efficiency of wireless power transmission.
Implementation Method 1
A wireless power transmission system used for mobile objects such as vehicles electromagnetically couples a power transmitting coil included in a power transmitting device and a power receiving coil included in a power receiving device with each other and transmits power from the power transmitting coil to the power receiving coil
Implementation Method 2
moving, if the mobile member holds a metal foreign object, the metal foreign object from a position overlapping the power transmitting coil to a position not overlapping the power transmitting coil by moving the mobile member from the position overlapping the power transmitting coil to a position not overlapping the power transmitting coil before the power transmitting coil begins to transmit the power
Data Source
AI summary
A method for controlling a power transmitting device includes moving, if a mobile member holds a metal foreign object, the metal foreign object from a position overlapping a power transmitting coil to a position not overlapping the power transmitting coil by moving the mobile member from the position overlapping the power transmitting coil to a position not overlapping the power transmitting coil before the power transmitting coil begins to transmit power, causing the power transmitting coil to output the power, and moving, if another metal foreign object comes to a position overlapping the power transmitting coil when the mobile member is located at the position not overlapping the power transmitting coil, the other metal foreign object to a position not overlapping the power transmitting coil by returning the mobile member to the position overlapping the power transmitting coil in the state where the mobile member holds the foreign matter.