Resonant Inductive Charger with Dynamic Frequency Tuning
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Solution Overview
Problem
Current wireless mobile device chargers have limited charging ranges and require physical contact, restricting device movement and usability during charging.
Innovation Solution
The implementation of resonant inductive coupling between a wireless inductive charging device and a mobile device's battery, allowing for adjustable power transfer efficiency and greater freedom of positioning, enabling wireless charging of multiple devices over wider ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional inductive charging is used, then wireless charging is achieved, but charging range is limited and physical contact is required
Solution Approach 1:
The patent implements dynamic tuning of the resonant frequency of the charging coil system to match the resonant frequency of the device being charged. This dynamic adjustment allows the system to maintain efficient power transfer over varying distances and positions, thereby extending the effective charging range while preserving wireless charging convenience
Solution Approach 2:
The system changes the operating parameters of the charging coil, specifically the resonant frequency, to optimize power transfer at different distances. By adjusting the resonant frequency parameter dynamically, the system overcomes the limited charging range of traditional inductive charging while maintaining wireless operation
2Loss of energy
If resonant frequency tuning is implemented, then power transfer efficiency is improved, but device complexity increases
Solution Approach 1:
The system employs feedback mechanisms where the charging device detects the resonant frequency of the target device and adjusts its own coil frequency accordingly. This feedback loop maintains optimal power transfer efficiency by continuously matching resonant frequencies, while the automated nature of the process minimizes the perceived complexity for the user
3Adaptability or versatility
If multiple devices are charged simultaneously, then charging versatility is improved, but power distribution control becomes more difficult
Solution Approach 1:
The charging system segments the power distribution by identifying and tuning to the resonant frequency of each individual device present in the charging area. This segmentation allows the system to independently manage power transfer to multiple devices simultaneously, maintaining control over power distribution while providing versatile multi-device charging capability
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 solution provides efficient and flexible wireless charging that maintains power transfer efficiency, allowing mobile devices to be used freely while charging, even over wider positional ranges.
Implementation Method 1
wireless inductive charging device and a mobile device with which the charging device is resonantly inductively coupled
Implementation Method 2
resonant inductive coupling between a wireless inductive charging device and a mobile device
Data Source
AI summary
Inductive wireless charging for mobile devices are described that utilize resonant inductive coupling between a wireless inductive charging device and the battery of the mobile device. The power transfer from the charging device to the mobile device is adjustable. Signals are sent between the devices to determine power transfer efficiency and to adjust settings to approach or achieve a desired target efficiency.