Wireless Power Cavity Resonance Frequency Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless power transmission technologies continuously expose a magnetic field, leading to human body exposure during transmission, and struggle to adaptively change operating frequencies based on relative positions between transmission and reception cavities without reducing power transmission efficiency.
Innovation Solution
A wireless power transmission apparatus utilizing a transmission cavity and a nonlinear feedback circuit to adaptively control the operating frequency through cavity-resonance, minimizing electromagnetic field exposure by leveraging a honeycomb structure for energy coupling and a high Q-factor, while maintaining power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If magnetic induction method or magnetic resonance method is used for wireless power transmission, then power transmission efficiency is improved, but electromagnetic field exposure to human body increases
Solution Approach 1:
The patent divides the resonant system into separate transmission and reception coils with different resonant frequencies, preventing continuous resonance and reducing electromagnetic field exposure while maintaining power transmission efficiency through controlled energy transfer
Solution Approach 2:
The patent employs periodic modulation of the transmission signal to transfer power in pulses rather than continuous wave, allowing the system to maintain efficiency while reducing the duration and intensity of electromagnetic field exposure to safe levels
2Stability of the object's composition
If operating frequency is fixed for wireless power transmission, then system stability is improved, but adaptability to relative position changes between transmission and reception cavities deteriorates
Solution Approach 1:
The patent implements dynamic frequency adjustment capability where the transmission system can adapt its operating frequency based on the relative position and coupling conditions between transmission and reception coils, maintaining optimal power transfer efficiency across varying configurations while preserving system stability through controlled adaptation
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 apparatus effectively reduces electromagnetic field exposure during wireless power transmission while maintaining high power transmission efficiency by adaptively tuning the operating frequency based on the relative positions of the cavities, achieving efficient energy transfer through a low energy coupling factor and high Q-factor.
Implementation Method 1
a transmission cavity (110) for leaking electromagnetic waves to a reception cavity R through cavity-resonance with the reception cavity
Implementation Method 2
a nonlinear feedback circuit (120) formed on a feedback path including the transmission cavity and configured to adaptively control an operating frequency in response to a change in a system resonance frequency
Data Source
AI summary
Disclosed in a wireless power transmission apparatus based on cavity-resonance including a transmission cavity leaking electromagnetic waves to a reception cavity through cavity-resonance with the reception cavity, and a nonlinear feedback circuit formed on a feedback path including the transmission cavity and configured to adaptively control an operating frequency in response to a change in a system resonance frequency according to the cavity-resonance.