Wireless Power Transmission Apparatus 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 freedom and increasing the risk of electromagnetic interference when multiple coils are used.
Innovation Solution
A wireless power transmission apparatus with multiple primary coils, each managed by a local controller, which can independently transmit power and send status signals to adjacent coils to prevent concurrent transmission and mitigate interference, 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 electromagnetic interference between adjacent coils increases
Solution Approach 1:
The system divides the wireless power transmission function into multiple independent primary coils, each managed by its own local controller. This segmentation allows different regions of the charging surface to operate independently, enabling flexible positioning while isolating electromagnetic interference to local areas only when coils are simultaneously active.
Solution Approach 2:
Adjacent primary coils exchange status signals indicating their transmission state. When one coil detects that an adjacent coil is actively transmitting power, it receives feedback through these status signals and adjusts its operation accordingly, creating a feedback mechanism that prevents harmful electromagnetic interference.
2Productivity
If multiple primary coils operate independently to enable concurrent charging, then productivity is improved, but electromagnetic interference between coils worsens
Solution Approach 1:
The charging system is segmented into multiple independently controlled primary coil units, each capable of concurrent operation. The segmentation is managed through local controllers that independently control each coil's activation, allowing multiple devices to be charged simultaneously while maintaining isolation between active coils.
Solution Approach 2:
A feedback mechanism using status signals enables adjacent primary coils to communicate their transmission state. When one coil is actively charging a device, adjacent coils receive this status information and adjust their operation to avoid simultaneous activation, thereby preventing electromagnetic interference while still allowing concurrent charging of multiple devices separated by sufficient distance.
3Object-generated harmful factors
If adjacent primary coils are muted when one is transmitting, then electromagnetic interference is reduced, but positioning flexibility is limited
Solution Approach 1:
The system segments the charging surface into multiple independent zones, each with its own primary coil and local controller. This segmentation allows the system to activate only the specific zone where a device is detected, maintaining positioning flexibility while preventing interference from adjacent zones through localized control.
Solution Approach 2:
The local controllers continuously exchange status signals providing feedback about transmission states. This feedback mechanism enables the system to dynamically adjust which coils are active based on real-time detection of device positions, thereby maintaining positioning flexibility while preventing electromagnetic interference through coordinated control.
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 charging efficiency, reliability, and flexibility by preventing interference between coils, enabling wireless power transfer regardless of device orientation and position, while reducing electromagnetic interference.
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 when the secondary coil is placed in proximity to the primary coil
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 (such as a charging pad or surface) may include multiple primary coils and multiple local controllers (such as one local controller per primary coil). Each local controller can independently activate a primary coil to supply power to a wireless power receiving apparatus. Thus, the wireless power transmission apparatus may support concurrent charging of multiple wireless power receiving apparatuses. When a first primary coil is activated, a local controller can mute or disable the adjacent primary coils (near the first primary coil) to mitigate undesirable interference. In some implementations, the local controller may provide a status to other local controllers (associated with adjacent primary coils) to disable the adjacent primary coils.