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 simultaneous charging.
Innovation Solution
A wireless power transmission apparatus with multiple primary coils, managed by local and master controllers, selectively couples primary coils to prevent adjacent coils from interfering while ensuring efficient power transfer, allowing for flexible positioning and concurrent charging of multiple devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple primary coils are used to enable flexible positioning and concurrent charging, then adaptability and productivity are improved, but device complexity increases due to multiple controllers and switching mechanisms
Solution Approach 1:
The system divides the wireless power transmission apparatus into multiple independent primary coils, each associated with its own local controller. This segmentation allows each coil to operate independently, enabling flexible positioning and concurrent charging of multiple devices while maintaining manageable complexity through modular architecture.
Solution Approach 2:
The system employs dynamic switching mechanisms controlled by master and local controllers that can selectively activate or deactivate primary coils based on real-time detection of device positions and charging needs. This dynamic control optimizes system adaptability while managing complexity through intelligent resource allocation.
2Productivity
If adjacent primary coils operate simultaneously, then productivity is improved through concurrent charging, but electromagnetic interference increases reducing reliability
Solution Approach 1:
The system implements feedback mechanisms where local controllers continuously monitor the operational status and power transfer efficiency of adjacent primary coils. Based on this feedback, the master controller dynamically adjusts which coils are activated, preventing simultaneous operation of adjacent coils that would cause electromagnetic interference, thus maintaining reliable power transfer while enabling concurrent charging of non-adjacent devices.
Solution Approach 2:
The system proactively prevents electromagnetic interference by implementing control logic that detects when adjacent coils would operate simultaneously and preemptively deactivates one of them. This preliminary anti-action ensures reliable power transfer by eliminating the potential for interference before it occurs, while still maintaining high productivity through alternative coil selection for concurrent charging.
3Loss of energy
If strict alignment between primary and secondary coils is enforced, then power transfer efficiency is improved, but ease of operation deteriorates due to positioning constraints
Solution Approach 1:
The system divides the transmission area into multiple zones with separate primary coils, each optimized for efficient power transfer to devices in its specific zone. This segmentation allows devices to be placed flexibly across different positions while maintaining efficient power transfer by activating the appropriate coil for each device's location, eliminating the need for strict alignment constraints.
Solution Approach 2:
Each primary coil is designed with specific characteristics optimized for its local operating zone, allowing the system to maintain high power transfer efficiency for each individual coil-device pair while accommodating diverse device positions. The local optimization of each coil enables flexible positioning without compromising overall system efficiency.
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 minimizing interference and enabling charging across various positions and orientations, while reducing the complexity and cost of the system.
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
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.