Wireless Charging Coil Matrix With Local Control for Alignment-Free Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wireless power systems are limited by the need for precise alignment between primary and secondary coils, which restricts positional freedom and efficiency, and often result in complex circuitry and electromagnetic interference when trying to charge multiple devices simultaneously.
Innovation Solution
A wireless power transmission apparatus with multiple primary coils, each independently controlled by local controllers, arranged in a partially overlapping pattern to optimize electromagnetic field coverage and allow charging regardless of device position or orientation, using separate circuitry and integrated circuits to manage and coordinate power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single primary coil is used with precise alignment requirements, then power transfer efficiency is improved, but positional freedom and ease of operation deteriorate
Solution Approach 1:
The wireless power transmission apparatus is divided into multiple independent primary coils (first primary coil, second primary coil, third primary coil, fourth primary coil) arranged in a 2x2 matrix. Each coil can be independently controlled by dedicated control circuits, allowing the system to segment the power transmission function across multiple units rather than relying on a single coil with strict alignment requirements.
Solution Approach 2:
The system activates only the necessary subset of primary coils based on the position and orientation of the wireless power receiving apparatus. The control circuits determine which specific coils need to be active to achieve adequate power transfer, avoiding the need to activate all coils simultaneously and thereby maintaining efficiency while providing positional flexibility.
2Adaptability or versatility
If multiple primary coils are used to increase charging area and flexibility, then ease of operation and adaptability are improved, but device complexity and electromagnetic interference worsen
Solution Approach 1:
The control system is segmented into multiple independent control circuits, with each control circuit dedicated to controlling a specific primary coil. This segmentation allows for modular design and independent operation of each coil unit, managing system complexity through functional decomposition.
Solution Approach 2:
Each primary coil is equipped with its own dedicated control circuit that can independently detect the presence and state of wireless power receiving apparatus and adjust power transmission parameters locally. This local quality approach allows each coil to operate autonomously based on local conditions, reducing the need for complex centralized control.
3Productivity
If multiple primary coils are activated simultaneously to charge multiple devices, then productivity is improved, but electromagnetic interference and loss of energy worsen
Solution Approach 1:
Each primary coil with its dedicated control circuit operates independently based on local detection of receiving apparatus. The control circuits locally determine power transmission parameters and activation states, allowing multiple coils to be activated simultaneously only where needed, thereby reducing unnecessary electromagnetic interference while maintaining multi-device charging productivity.
Solution Approach 2:
The system activates only the specific primary coils that have detected wireless power receiving apparatus in their vicinity, rather than activating all coils simultaneously. This partial action approach enables multi-device charging when needed while avoiding the electromagnetic interference and energy waste that would result from activating all coils regardless of device presence.
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
Enables efficient and flexible wireless charging of multiple devices across a large area without alignment constraints, reducing complexity and electromagnetic interference, and allowing seamless power transfer as devices move across the charging surface.
Implementation Method 1
a wireless power transmission apparatus may include a primary coil that produces an electromagnetic field which induces a voltage in a secondary coil placed in proximity to the primary coil
Data Source
AI summary
This disclosure provides systems, devices, apparatus and methods, including computer programs encoded on storage media, for wireless power transmission. In accordance with this disclosure, a wireless power transmission apparatus (such as a charging pad) may support positional freedom such that a wireless power receiving apparatus may be charged regardless of positioning or orientation of the wireless power receiving apparatus. Various implementations include the use of multiple primary coils in a wireless power transmission apparatus. The multiple primary coils may be configured in a pattern, size, shape, or arrangement that enhances positional freedom. In some implementations, the placement of the multiple primary coils may optimize the size and distribution of electromagnetic fields that are available to charge a wireless power receiving apparatus.