Wireless Charger Movable Coil Alignment
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Solution Overview
Problem
Mobile terminals require frequent battery charging due to increased functionality, making it inconvenient to use them during charging with traditional wired chargers.
Innovation Solution
A wireless charger with a spirally wound power transmitting coil, a driving unit that adjusts its position to optimize coil alignment with the mobile terminal, and a control unit that adjusts impedance to enhance charging efficiency, allowing for wireless charging without the need for a physical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wireless charger with a fixed power transmitting coil is used, then the device structure is simple, but charging efficiency is low when the mobile terminal is not properly aligned
Solution Approach 1:
The patent implements a movable power transmitting coil that can dynamically adjust its position along the charging surface based on the detected location of the mobile terminal. The coil is coupled to a driving unit that receives control signals from a sensing unit, enabling real-time positional adjustment to maintain optimal alignment with the terminal's charging coil, thereby resolving the contradiction between fixed structure simplicity and alignment-dependent charging efficiency
Solution Approach 2:
The wireless charger employs autonomous self-alignment through integrated sensing and control systems. The sensing unit automatically detects the mobile terminal's position, and the control unit autonomously directs the driving unit to reposition the power transmitting coil accordingly, eliminating the need for manual intervention and achieving optimal charging alignment automatically
2Adaptability or versatility
If the power transmitting coil covers a large area, then it can charge terminals at any location, but the coil size and device dimensions increase
Solution Approach 1:
Instead of using a large fixed-area coil to cover all possible terminal positions, the patent employs a smaller power transmitting coil that dynamically repositions itself along the charging surface. This dynamic relocation capability allows the compact coil to service multiple locations sequentially, achieving full-surface charging coverage without requiring a large coil area
Solution Approach 2:
The charging function is segmented across multiple positions rather than requiring simultaneous coverage of the entire surface. The power transmitting coil serves different spatial segments sequentially by moving to detected terminal locations, enabling comprehensive charging coverage through temporal segmentation of the charging process
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
The solution enables efficient charging of mobile terminals regardless of their location on the charger, improving charging efficiency and convenience by adjusting the coil's position and impedance to optimize power transfer.
Implementation Method 1
a power transmitting coil provided within the housing in a manner of being spirally wound plural times
Data Source
Figure 1~2
Figure 3(a)~3(c)
Figure 4(a)~4(b)
AI summary
Disclosed is a wireless charger for a mobile terminal, by which charging efficiency can be raised irrespective of a location of a mobile terminal mounted on the wireless charger. The present invention includes a housing, a power transmitting coil provided within the housing in a manner of being spirally wound plural times, a power supply module configured to externally supply a power to the power transmitting coil, a driving unit connected to a spiral center of the power transmitting coil, a sensing unit configured to sense a location of the mobile terminal mounted on a topside of the housing, and a control unit controlling the driving unit to shift the spiral center of the power transmitting coil to the location of the mobile terminal sensed by the sensing unit.