Looped Wireless Power Receiving Coil for Wearable Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable computing devices vary in shape and size, making it challenging to embed a wireless power receiving coil in a flat surface for efficient wireless charging.
Innovation Solution
Embedding a wireless power receiving coil within a looped structure of wearable devices, where each turn of the coil follows the entire length of the loop, allowing for a larger inductive area and variable loop configurations such as flexible, detachable, or foldable portions to maintain efficient charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a wireless power receiving coil is embedded in a flat surface of a wearable device, then the device structure is simple and easy to manufacture, but the inductive area is limited and wireless charging efficiency is reduced
Solution Approach 1:
The patent transitions from a two-dimensional flat surface embedding to a three-dimensional looped structure. The receiving coil is configured to follow the entire length of the loop, utilizing the third dimension (depth/loop formation) to significantly increase the inductive area without proportionally increasing device complexity. This dimensional change allows the coil to capture more magnetic flux while maintaining a wearable form factor.
Solution Approach 2:
The patent employs a looped or curved structure instead of a flat planar surface. The receiving coil follows the curvature of the loop, which enhances the inductive area by utilizing the spatial volume enclosed by the loop. This curved configuration allows for better magnetic coupling and resonance compared to a flat surface embedding.
2Adaptability or versatility
If the loop length of a wearable device is varied to fit different users, then the adaptability is improved, but the resonance frequency changes and wireless charging efficiency is affected
Solution Approach 1:
The patent incorporates adjustable or flexible loop configurations that can dynamically adapt to different user needs while maintaining wireless charging functionality. The system can adjust the loop length or configuration, and the receiving coil is designed to follow the entire length of the loop regardless of its size, ensuring consistent inductive area utilization. This dynamic adaptability allows the device to accommodate different users while maintaining reliable wireless charging through resonance frequency adjustment.
3Productivity
If a larger receiving coil is used to increase inductive area, then wireless charging efficiency is improved, but the device size and flexibility are reduced
Solution Approach 1:
The receiving coil is nested within the looped structure of the wearable device, with each turn of the coil following the entire length of the loop. This nesting approach allows the coil to achieve a larger effective inductive area by utilizing the spatial volume of the loop, without increasing the overall device dimensions. The coil is integrated into the loop structure itself, maximizing the use of available space.
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 approach enhances the efficiency of wireless charging by creating a larger inductive area and compensating for changes in loop length, ensuring effective magnetic coupling and resonance frequency adjustment for consistent power transfer.
Implementation Method 1
Magnetic resonance wireless charging may employ a magnetic coupling between the Tx coil and the Rx coil
Implementation Method 2
Magnetic resonance wireless charging may employ a magnetic coupling between the Tx coil and the Rx coil
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Techniques for wireless charging are described herein. For example, an apparatus includes a device formed in a loop. The apparatus may also include a receiving coil disposed around an entire length of the loop. Each turn of the wireless power receiving coil follows the entire length of the loop.