Multi-Coil Wireless Charging with Adjacent Coil Muting
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Solution Overview
Problem
Conventional wireless power systems face inefficiencies due to alignment requirements between primary and secondary coils, limiting positional flexibility and increasing the risk of electromagnetic interference from adjacent coils during power transfer.
Innovation Solution
A wireless power transmission apparatus with multiple primary coils, each individually coupled to a local controller via relays, is managed by a master controller to prevent adjacent coils from activating while power is being transferred, ensuring efficient and flexible power delivery to multiple devices without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple primary coils are used to improve positional flexibility, then device positioning flexibility is improved, but electromagnetic interference between adjacent coils increases
Solution Approach 1:
The system divides the primary coil array into multiple independently controllable segments (individual primary coils), each capable of being activated or deactivated. This segmentation allows selective operation of non-adjacent coils, reducing electromagnetic interference while maintaining flexible device positioning capability across the charging surface.
Solution Approach 2:
The system dynamically controls the activation state of each primary coil based on real-time detection of device position and charging status. When a device is charging on one coil, adjacent coils are dynamically deactivated to prevent interference, while other non-adjacent coils remain available for future device placement, thus adapting the system behavior to current operational conditions.
2Productivity
If adjacent primary coils are allowed to activate simultaneously, then power delivery capacity is improved, but interference during power transfer increases
Solution Approach 1:
The system segments the power delivery function across multiple independent primary coils, allowing simultaneous operation of non-adjacent coils. This maintains overall power delivery capacity while preventing adjacent coil interference, as each segment can operate independently without electromagnetic conflict with its neighbors.
Solution Approach 2:
The system implements periodic detection and control cycles to monitor device positions and adjust coil activation states accordingly. This periodic action ensures that adjacent coils are properly managed to prevent interference while maintaining optimal power delivery capacity through coordinated operation of multiple coils.
3Object-affected harmful factors
If alignment requirements are imposed to reduce interference, then electromagnetic interference is reduced, but positional flexibility is limited
Solution Approach 1:
By segmenting the primary coil array into many small, independently controllable units, the system eliminates the need for strict alignment requirements. Devices can be positioned over any active coil segment, and the system will activate the appropriate non-adjacent coils for charging, thus providing positional flexibility without requiring precise alignment while minimizing interference through selective activation.
Solution Approach 2:
The system dynamically adapts its coil activation pattern based on the actual device position, rather than requiring the device to align with specific coils. This dynamic adjustment allows the system to maintain low interference levels by activating only non-adjacent coils while accommodating various device positions and orientations freely.
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 enhances the efficiency and reliability of wireless power transfer by allowing devices to be charged in various positions and orientations, reducing interference and extending the life of relays through controlled switching, while maintaining modular design and cost-effectiveness.
Implementation Method 1
a primary coil that produces an electromagnetic field. The electromagnetic field may induce a voltage in a secondary coil of a wireless power receiving apparatus
Implementation Method 2
The power may be transferred using resonant or non-resonant inductive coupling between the primary coil and the secondary coil
Implementation Method 3
A relay may include a coil, a yoke, a movable arm, and a contact. The coil may be electrically coupled to the zone circuitry. The arm may be movable between a first position and a second position. The contact may be coupled to the primary coil. When the arm is in the first position, the contact may be disconnected from the primary coil. When the arm is in the second position, the contact may be connected to the primary coil
Data Source
AI summary
This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for a wireless power transmission apparatus that supports charging of one or more wireless power receiving apparatuses. The wireless power transmission apparatus may include multiple primary coils organized in groups (referred to as zones). Each zone may have a local controller for managing operation of one primary coil in the zone at a time. A master controller may selectively couple the primary coils to the local controllers. When a first primary coil is coupled to the local controller for a zone, the other primary coils in that zone may be disabled. The master controller may manage which primary coils from neighboring zones are coupled to their respective local controllers. Thus, when the first primary coil is activated, the adjacent primary coils (near the first primary coil) can be muted or disabled to mitigate undesirable interference.