Rotating Electromagnetic Field Wireless Power Source
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Solution Overview
Problem
Current wireless charging systems require precise alignment and orientation between the primary and secondary coils, limiting their effectiveness for charging multiple devices simultaneously, as they need to be positioned parallel to each other to avoid shielding and ensure efficient power transfer.
Innovation Solution
A wireless power source with a multiaxial coil arrangement and a controller that generates a rotating electromagnetic field in a three-dimensional charging space, allowing power transfer independent of the receiver coil's orientation and enabling charging of multiple devices stacked within the space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single primary coil is used for wireless charging, then the system structure is simple, but precise alignment between primary and secondary coils is required which limits the charging area and makes it difficult to charge multiple devices simultaneously
Solution Approach 1:
The single primary coil is divided into multiple primary coils arranged in an array. Each primary coil can independently generate magnetic flux, and their combined effect creates a larger effective charging area. This segmentation allows multiple secondary coils to be charged simultaneously without requiring precise alignment, as each secondary coil can couple with its nearest primary coil.
Solution Approach 2:
The patent transitions from a two-dimensional planar charging surface to a three-dimensional charging space by stacking primary and secondary coils in multiple layers. The primary coils are arranged in a first plane and secondary coils in a second plane, creating vertical separation. This dimensional change allows devices to be positioned at different heights and orientations, greatly enhancing placement flexibility and enabling simultaneous charging of multiple devices in stacked configurations.
2Productivity
If multiple devices are charged simultaneously on a planar surface, then they must be positioned parallel to each other, but this positioning constraint increases the difficulty of device placement and reduces flexibility
Solution Approach 1:
By introducing vertical stacking of coil arrays, the system enables devices to be positioned in three-dimensional space rather than constrained to a single plane. Devices can be stacked vertically with different orientations, allowing users to place devices according to their needs without requiring parallel alignment. This multi-layer configuration significantly improves ease of operation while maintaining high productivity.
3Productivity
If secondary coils are positioned close to each other to charge multiple devices, then shielding occurs which reduces power transfer efficiency, but increasing the distance between devices reduces the number of devices that can be charged simultaneously
Solution Approach 1:
Vertical stacking of primary and secondary coils in separate planes creates spatial separation that reduces magnetic interference between adjacent devices. The vertical distance between coil layers, combined with the horizontal spacing within layers, provides sufficient isolation to minimize shielding effects while maintaining compact form factor. This allows multiple devices to be charged simultaneously at close horizontal distances without significant efficiency loss.
Solution Approach 2:
Each primary coil in the array can be independently controlled and optimized for its local region. The controller adjusts the excitation of individual primary coils to compensate for shielding effects from nearby secondary coils, ensuring optimal power transfer efficiency for each device position. This localized control allows flexible device placement while maintaining 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
The solution eliminates the need for precise alignment and orientation, allowing for efficient power transfer to multiple devices positioned anywhere within the charging space, reducing shielding risks and enhancing flexibility in device placement.
Implementation Method 1
a set of transmitter coils (51-56) capable of generating an electromagnetic field (3) in a charging space (2)
Implementation Method 2
The controller (7) controls, when the wireless power source (5) is in operation, the set of transmitter coils (51-56) to rotate the electromagnetic field (3) in the three-dimensional charging space (2) around a rotational axis
Implementation Method 3
simultaneous, non-radiative, inductive, wireless power transfer to two or more devices to be powered
Data Source
AI summary
A wireless power source 1 for simultaneous, non-radiative, inductive, wireless power transfer to two or more devices to be charged. The wireless power source 1 comprises a set of transmitter coils for generating an electromagnetic field 3 in a three-dimensional charging space 2 and a controller connected to the set of transmitter coils for controlling the set of transmitter coils to rotate the electromagnetic field 3 in the charging space around a rotational axis.