Wireless Power Receiver Resonant Frequency Adaptation
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Solution Overview
Problem
Existing wireless power transfer technologies experience inefficiencies due to fixed resonant frequencies, which do not adapt to different wireless power transmission modes, leading to suboptimal power reception.
Innovation Solution
A wireless power receiver with a resonant tank that varies its resonant frequency based on a control signal, determined by a detecting unit analyzing the power signal, allowing it to adjust capacitance or inductance to match different wireless power transmission modes, such as WPC and PMA standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed resonant frequency is used in the resonant tank, then the device complexity is reduced, but the power transmission efficiency deteriorates when adapting to different wireless power transmission modes
Solution Approach 1:
The resonant tank is designed with dynamic parameters that can be adjusted in real-time. The capacitance value is changed based on the detected wireless power transmission mode (WPC or PMA), allowing the resonant frequency to adapt dynamically to different transmission standards, thus resolving the contradiction between adaptability and fixed structure
Solution Approach 2:
The invention changes the physical parameter (capacitance) of the resonant tank based on the operating conditions (transmission mode). By switching between different capacitance values corresponding to different frequency bands (100 kHz for WPC, 200 kHz for PMA), the system achieves adaptability without requiring a completely different hardware design for each mode
2Loss of energy
If the resonant frequency is adjusted to match different transmission modes, then the power transmission efficiency is improved, but the response time and control complexity increase
Solution Approach 1:
The system performs preliminary detection of the transmission mode before full power transfer begins. The determining unit identifies whether WPC or PMA mode is being used in advance, allowing the resonant tank to be pre-configured with the appropriate capacitance value, thus minimizing the time loss during frequency adjustment
Solution Approach 2:
The system implements a feedback mechanism where the determining unit continuously monitors the received signal characteristics and adjusts the resonant frequency accordingly. This closed-loop control ensures that the resonant frequency is optimized for the current transmission mode while maintaining the ability to respond to mode changes
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 approach enables rapid determination of the wireless power transmission mode and optimal power transmission efficiency by dynamically adjusting the resonant frequency, improving the overall efficiency of wireless power reception.
Implementation Method 1
a resonant tank receiving a power signal and varying a resonant frequency in response to a control signal
Implementation Method 2
adjusting the resonant frequency, thereby receiving the power signal with optimal power transmission efficiency
Data Source
AI summary
A wireless power receiver according to an exemplary embodiment in the present disclosure may include a resonant tank receiving a power signal and varying a resonant frequency in response to a control signal; and a determining unit determining a wireless power transmission mode on the basis of the power signal and outputting the control signal depending on a determination result.