Segmented Soft Magnetic Layer for Wireless Power Receiving Antenna
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power receiving devices face challenges in minimizing magnetic loss, especially at high frequencies, which affects the efficiency of wireless power transceiving and the simultaneous operation of wireless power conversion (WPC) and near field communication (NFC) functions.
Innovation Solution
A receiving antenna design featuring a soft magnetic layer with gaps at predetermined intervals, supported by a substrate and a coil wound parallel to the soft magnetic layer, utilizing a nanocrystalline metallic ribbon with sub soft magnetic layers of specific widths to minimize magnetic loss and enhance electromagnetic energy focusing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a soft magnetic material is disposed around the transmitting antenna and receiving antenna to focus electromagnetic energy, then electromagnetic energy focusing is improved, but magnetic loss increases at high frequency
Solution Approach 1:
The soft magnetic layer is divided into multiple segments with gaps between them. This segmentation reduces eddy current losses at high frequencies while maintaining the magnetic focusing effect. The gaps interrupt the continuous magnetic path, reducing energy loss through eddy currents while still allowing the segmented layers to collectively focus electromagnetic energy.
Solution Approach 2:
The soft magnetic layer is positioned locally around the coil structure where it is most needed for focusing electromagnetic energy. By placing the magnetic material only in specific locations rather than uniformly throughout the device, the patent achieves effective energy focusing while minimizing overall magnetic loss.
2Adaptability or versatility
If the wireless power receiving device simultaneously has WPC and NFC functions, then functionality is improved, but magnetic loss increases at high frequency for WPC operation
Solution Approach 1:
The segmented soft magnetic layer structure allows the device to simultaneously support both WPC and NFC functions. The gaps in the magnetic layer reduce eddy current losses at the higher frequencies used in NFC operation, while still maintaining sufficient magnetic permeability for WPC functionality at lower frequencies.
Solution Approach 2:
The patent optimizes the parameters of the soft magnetic layer including gap width, layer thickness, and material composition to achieve low loss characteristics across both low frequency (WPC) and high frequency (NFC) operating ranges. By carefully controlling these parameters, the device can perform both functions simultaneously with minimized magnetic loss.
3Length of moving object
If the soft magnetic layer is made thinner to suit slim devices, then device thickness is reduced, but electromagnetic energy focusing effect decreases
Solution Approach 1:
The segmented structure with multiple thin magnetic layers separated by gaps achieves better energy focusing than a single thick layer of the same total thickness. The gaps between segments reduce magnetic saturation and improve flux distribution, allowing thin layers to collectively provide strong focusing effect.
Solution Approach 2:
The patent uses composite structures combining soft magnetic layers with non-magnetic spacer materials. This composite approach allows the magnetic layers to be very thin while the overall structure maintains effective focusing through the cumulative effect of multiple layers and optimized magnetic circuit design.
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 design increases the efficiency of electromagnetic energy focusing, reduces magnetic loss at both low and high frequencies, and supports the simultaneous operation of WPC and NFC functions, making it suitable for various electronic devices, including slim devices like TVs and portable terminals, as well as applications in electric cars and subway trains.
Implementation Method 1
a coil stacked on the soft magnetic layer, and receiving an electromagnetic energy emitted from a wireless power transmission device
Implementation Method 2
a soft magnetic material may be disposed around the transmitting antenna and the receiving antenna to focus electromagnetic energy emitted from the transmitting antenna toward the receiving antenna
Data Source
AI summary
A receiving antenna of a wireless power receiving device wirelessly charging electrical power according to an embodiment of the present invention includes a substrate, a soft magnetic layer stacked on the substrate, including a soft magnetic material, and having gaps at predetermined intervals, and a coil stacked on the soft magnetic layer and receiving electromagnetic energy emitted from a wireless power transmission device.