Wireless Charging Coils on Separated Cores
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Solution Overview
Problem
Existing wireless charging methods using electromagnetic induction are limited by a narrow chargeable range and magnetic field interference, preventing simultaneous charging of multiple devices and efficient power transmission.
Innovation Solution
A wireless charging apparatus with multiple coils disposed on separate cores, where coils partially overlap to prevent magnetic field interference and allow for wide-range electromagnetic induction, enabling multiple devices to be charged simultaneously by selecting the optimal transmitting coil for each receiving coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple coils are disposed on separated cores, then magnetic field interference is reduced and multiple devices can be charged simultaneously, but device complexity increases
Solution Approach 1:
The wireless charging apparatus is divided into multiple independent coil units, each disposed on a separate core. Each coil-core combination operates as an independent module that can charge one device at a time. This segmentation allows multiple devices to be charged simultaneously without magnetic field interference between them, as each core generates its own localized magnetic field.
Solution Approach 2:
The wireless charging apparatus with multiple coils on separated cores can serve multiple functions: it can charge one device at a time, multiple devices simultaneously at different positions, and adapt to various device placements within the charging area. Each coil unit can be independently activated based on device detection, providing universal charging capability across different spatial locations.
2Area of stationary object
If coils partially overlap to extend chargeable range, then charging area is increased, but magnetic field interference occurs
Solution Approach 1:
The charging area is segmented into multiple zones, each served by a separate coil on its own core. This allows the overall chargeable range to be extended by adding more segmented coil units, while each segment maintains independent magnetic field control to avoid interference.
Solution Approach 2:
Separate cores act as intermediaries between each coil and the devices being charged. Each core confines and directs the magnetic field generated by its associated coil, preventing magnetic field lines from different coils from interfering with each other, thus enabling extended chargeable range without interference.
3Device complexity
If a single core is used with multiple coils, then device complexity is reduced, but magnetic field interference prevents simultaneous charging of multiple devices
Solution Approach 1:
Instead of using a single core with multiple coils, the invention segments the core structure into multiple separate cores, each dedicated to one coil. This segmentation physically isolates the magnetic fields of different coils, enabling simultaneous charging of multiple devices without interference, while maintaining relatively simple individual core structures.
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 extends the chargeable range, reduces power consumption, and improves power transmission efficiency by allowing multiple devices to be charged simultaneously without magnetic field interference, using the overlapping coils to transmit power over a wide area.
Implementation Method 1
power is transmitted from the non-contact power transmitting device to the non-contact power receiving device through electromagnetic induction between the two apparatuses
Implementation Method 2
multiple coils are disposed on separated cores, where coils partially overlap to prevent magnetic field interference
Data Source
AI summary
Provided are a wireless charging apparatus in which multiple coils overlaps with one another on separated cores, and a wireless charging system including such wireless charging apparatus. According to an embodiment of the present disclosure, the wireless charging apparatus includes a plurality of plate coils spaced apart from one another, a first coil disposed on the plurality plate coils, and a second coil disposed on the first coil to partially overlap with the first coil.