Resonant Inductive Receiver Circuit for Flexible Phone Charging
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Solution Overview
Problem
Conventional inductive charging systems for mobile devices face limitations such as limited charging distance, sensitivity to relative position and orientation, and overheating when charging multiple devices simultaneously, necessitating a more flexible and efficient wireless power reception method.
Innovation Solution
A resonant inductive wireless power receiver system integrated into mobile devices or accessories, featuring a wireless charging circuit that activates only when a charging cable is not plugged in, and includes a current limiter to adjust power levels based on distance from the transmitter, with an optional power pass-through connector for wired charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional inductive charging is used, then charging function is provided, but charging distance is limited and sensitivity to position and orientation occurs
Solution Approach 1:
The patent changes the operating parameters by using resonant frequency matching between transmitter and receiver coils, operating at 6.78 MHz. This allows the system to maintain reliable charging over extended distances by tuning the resonant frequencies to match, overcoming the limitations of conventional inductive charging where distance and alignment are critical constraints
2Length of stationary object
If resonant inductive charging is used, then charging distance is extended, but integration with mobile devices becomes challenging
Solution Approach 1:
The patent segments the charging system into separate transmitter and receiver modules that can be independently integrated. The receiver module includes a coil assembly, rectifier circuit, and control logic that can be integrated into mobile devices without requiring complete system redesign, thereby reducing integration complexity while maintaining extended charging distance capabilities
3Ease of operation
If wireless charging circuit is always active, then charging convenience is improved, but power consumption increases and overheating occurs
Solution Approach 1:
The patent implements feedback control through a control logic module that continuously monitors the charging state, distance between transmitter and receiver, and power transfer efficiency. Based on this feedback, the system dynamically adjusts or disables the wireless charging circuit, preventing unnecessary power consumption and overheating while maintaining charging convenience when conditions are appropriate
4Adaptability or versatility
If wireless charging is used, then charging flexibility is improved, but overheating occurs when charging multiple devices simultaneously
Solution Approach 1:
The patent applies partial action by enabling wireless charging for only one device at a time or at reduced power levels when multiple devices are present. The control logic prioritizes charging based on detected needs and environmental conditions, allowing the system to maintain charging flexibility while preventing overheating by not fully activating all charging channels simultaneously
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 enhances charging flexibility and efficiency by allowing wireless charging at varying distances and orientations, while enabling simultaneous charging from both wireless and wired sources, reducing overheating and user inconvenience.
Implementation Method 1
a resonant receiving coil configured to receive power wirelessly
Implementation Method 2
resonant inductive receiver system
Data Source
AI summary
The disclosed technology provides a resonant inductive receiver integrated in a wireless power receiver accessory such as a phone case and configured to provide power to an electronic device such as a mobile phone. The power to charge the electronic device is received from a pass-through connector coupled to the receiver accessory when a wired charger is plugged into the connector, or received from a wireless power transmitter when a wired charger is not plugged into the connector and the wireless power receiver is proximate to the wireless power transmitter.