Wireless Charging Mode Switching Across Coil Distance Changes
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Solution Overview
Problem
Existing wireless charging technologies struggle to efficiently switch between magnetic induction and magnetic resonance modes based on charging environment changes, leading to suboptimal charging efficiency due to misalignment or distance variations between coils.
Innovation Solution
An electronic device equipped with a wireless charging circuit and processor dynamically selects and switches between magnetic induction and magnetic resonance modes based on detected frequency changes and charging efficiency, ensuring optimal power reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If magnetic induction mode is used for wireless charging, then charging efficiency is improved, but charging distance is limited to several mm
Solution Approach 1:
The system dynamically switches between magnetic induction mode and magnetic resonance mode based on the distance between coils. When the distance exceeds several mm, the system transitions from magnetic induction mode to magnetic resonance mode to maintain effective charging, making the charging system adaptive to varying distances rather than fixed in one mode.
Solution Approach 2:
The system changes the operating parameters by switching between different wireless charging modes (magnetic induction vs. magnetic resonance) depending on the coupling condition and distance. This parameter change allows the system to optimize between charging efficiency at short distances and charging distance at longer ranges.
2Length of moving object
If magnetic resonance mode is used for wireless charging, then charging distance is extended to several tens of cm, but charging efficiency deteriorates
Solution Approach 1:
The system uses dynamic mode switching to adapt to changing distances. When the electronic device enters a space where a beacon of the wireless charger exists (indicating certain distance conditions), the system determines to switch from magnetic resonance mode to magnetic induction mode to improve charging efficiency while maintaining adequate charging distance.
Solution Approach 2:
The system employs feedback mechanisms to monitor charging efficiency and distance conditions, then adjusts the wireless charging mode accordingly. The processor determines whether to change modes based on detected frequency changes and charging efficiency metrics, creating a closed-loop control system that optimizes performance.
3Loss of time
If wireless charging mode is determined in initial stage, then charging can start immediately, but mode cannot be changed if environment changes during charging
Solution Approach 1:
The wireless charging system transitions from a static mode determination (fixed at initial stage) to a dynamic mode switching capability. The system can now change modes during charging based on real-time conditions such as distance variations, coil misalignment, or detected frequency changes, making the system both responsive and adaptive without delaying charging initiation.
Solution Approach 2:
The system performs preliminary mode determination to start charging immediately, then monitors conditions during charging. When changes are detected (such as frequency changes or efficiency drops), the system executes mode switching as a preliminary corrective action to maintain optimal performance throughout 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
Enhances wireless charging efficiency by adaptively changing modes to maintain high efficiency despite changes in alignment or distance, improving overall charging performance.
Implementation Method 1
The magnetic induction mode is a wireless charging mode that wirelessly delivers power through an induced current that is provided using a magnetic field provided between a coil included in an electronic device and a coil included in a wireless charger
Implementation Method 2
The magnetic resonance mode is a wireless charging mode that wirelessly delivers power by using a magnetic resonance phenomenon provided between a coil included in an electronic device and a coil included in a wireless charger
Data Source
AI summary
An electronic device is provided. The electronic device includes a wireless charging circuit and a processor operatively connected to the wireless charging circuit, wherein the processor is configured to wireless receive power wireless from an external device through the wireless charging circuit on the basis of a first wireless charging mode using a first frequency, detect a second frequency rather than the first frequency through the wireless charging circuit, and determine, in response to detecting the second frequency, whether to change the charging mode from the first wireless charging mode to a second wireless charging mode, based on at least one of a wireless charging efficiency or an output voltage of the electronic device.