Wireless Power Coil Shielding for Overlap Interference Control
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Solution Overview
Problem
Wireless power transmission devices with multiple coils face efficiency issues due to misalignment and mutual interference, leading to reduced power transmission/reception efficiency, heat generation, and communication deterioration.
Innovation Solution
Incorporating a shielding member between overlapping regions of adjacent coils to block electromagnetic interference, allowing for improved alignment and reduced heat generation by selectively using coils for power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmission coils are used to improve positioning flexibility and power transmission efficiency, then user convenience and power transmission efficiency are improved, but electromagnetic field interference between coils occurs causing heat generation and communication deterioration
Solution Approach 1:
A shielding member is introduced as an intermediary element between adjacent transmission coils to block electromagnetic field interference. The shielding member, positioned in the overlapping region of adjacent coils, prevents magnetic flux from one coil from inducing current in adjacent coils, thereby eliminating the harmful electromagnetic interference while allowing multiple coils to operate simultaneously for improved power transmission efficiency
Solution Approach 2:
The harmful electromagnetic field interference is extracted and isolated from the system by introducing a dedicated shielding component. The shielding member specifically targets and removes the interfering magnetic flux between coils, allowing the beneficial electromagnetic fields for power transmission to remain intact while eliminating the harmful side effects
2Ease of operation
If transmission coils are not properly aligned with reception coil, then positioning flexibility is reduced, but electromagnetic field forms induced current in mechanical structure causing heat generation
Solution Approach 1:
The shielding member acts as a mediator that allows the transmission coil to generate electromagnetic fields for power transmission while preventing the formation of harmful induced currents in adjacent coils and mechanical structures. This enables proper alignment to be maintained even when positioning flexibility is required
3Adaptability or versatility
If multiple transmission coils operate simultaneously to charge multiple devices, then charging capability is improved, but mutual interference of electromagnetic fields occurs causing distortion and heat generation
Solution Approach 1:
The shielding member serves as a mediator that enables multiple transmission coils to operate simultaneously without mutual interference. By blocking the magnetic flux between adjacent coils, the shielding member prevents electromagnetic field distortion and allows the system to reliably charge multiple devices at the same time
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
Enhances power transmission/reception efficiency, prevents heat generation in reception-side electronic devices, and maintains communication performance by minimizing electromagnetic field interference between coils.
Implementation Method 1
a first shielding member disposed on at least a portion of the first overlapping region... configured to at least partially block interference of an electromagnetic field generated by the second coil in the first conductive wire region
Implementation Method 2
wireless power transmission technology is a method of transmitting power by using an electromagnetic field induced in a coil, in which an electromagnetic field may generated by applying current to a transmission coil and an induced current is formed in a reception coil by the generated electromagnetic field
Data Source
AI summary
A wireless power transmission apparatus is provided. The wireless power transmission apparatus includes a first coil including a first conductive wire area formed of an arrangement of conductive wires, and a first opening area surrounded by the first conductive wire area, a second coil including a second conductive wire area formed of an arrangement of conductive wires, and a second opening area surrounded by the second conductive wire area, a first overlapping area formed by overlapping a portion of the first conductive wire area with a portion of the second opening area, and a first shielding member disposed on at least a portion of the first overlapping area, wherein the first shielding member may be configured to at least partially block an electromagnetic field generated by the second coil interfering in the first conductive wire area.