Wireless Charging Pad Movable Coil Alignment
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Solution Overview
Problem
Wireless charging efficiency is reduced due to misalignment between receive and transmit coils, leading to excessive power supply and heating in electronic devices.
Innovation Solution
A wireless charging system with a transmit coil and a receive coil, both wound to form surfaces with central portions empty, and magnetic substances disposed at a distance from the central portions, along with a movable supporting structure for the transmit coil substrate, to facilitate accurate alignment and efficient power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RX coil and TX coil are in an error alignment state, then wireless charging efficiency is abruptly decreased, but power supplied from the TX coil is excessively increased causing heating
Solution Approach 1:
The supporting structure is designed to be movable relative to the pad case, allowing the TX coil substrate to dynamically adjust its position. This enables real-time alignment optimization between the TX coil and RX coil, maintaining high charging efficiency while preventing excessive power supply and heating when misalignment occurs
Solution Approach 2:
The system incorporates alignment detection capability that monitors the relative position between TX and RX coils. Based on the detected alignment state, the supporting structure adjusts the TX coil substrate position accordingly, creating a closed-loop control system that prevents efficiency degradation and overheating
2Adaptability or versatility
If the central portion of the coil is empty to improve alignment flexibility, then manufacturing precision may be compromised
Solution Approach 1:
The coil structure is segmented into an outer winding portion and a central empty portion. This segmentation allows the coil to be wound with precise control over the outer dimensions while leaving the center open for alignment adjustments, combining manufacturing precision with alignment flexibility
Solution Approach 2:
Different regions of the coil substrate serve different functions: the outer region contains the precisely wound coil for efficient power transfer, while the central region is intentionally left empty to provide alignment flexibility. This local differentiation optimizes both manufacturing precision and adaptability
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
Improves alignment accuracy and charging efficiency, reducing power excess and heating issues, enabling reliable wireless charging even with non-matching coil positions.
Implementation Method 1
a wireless charging module configured to receive power induced to the RX coil
Implementation Method 2
a pad magnetic substance disposed on the TX coil substrate at a distance from the central portion of the TX coil
Data Source
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AI summary
A wireless charging pad, a wireless charging device including the wireless charging pad, and an electronic device using the wireless charging device are provided. The wireless charging pad includes a pad case, a transmit (TX) coil disposed on an inner side of the pad case, and wound to form a surface for which a central portion of the TX coil is empty, a TX coil substrate on which the TX coil is disposed, a pad magnetic substance disposed on the TX coil substrate at a distance from the central portion of the TX coil, and a supporting structure supporting the TX coil substrate, the supporting structure movable relative to the pad case.