Resonance Bandwidth Control for Wireless Power Stability
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Solution Overview
Problem
Existing wireless power transmission systems face efficiency issues due to variations in distance and matching requirements between source and target resonators, leading to reduced performance and efficiency.
Innovation Solution
An apparatus and method for controlling the resonance bandwidth between source and target resonators in a wireless power transmission system, allowing for dynamic adjustment of resonance bandwidth and impedance matching to maintain optimal power transfer despite changes in distance and impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the resonance bandwidth is narrowed to improve impedance matching, then power transfer efficiency improves under ideal conditions, but the system becomes highly sensitive to distance variations and coupling coefficient changes
Solution Approach 1:
The patent applies dynamics by making the resonance bandwidth adjustable rather than fixed. The system dynamically adapts the resonance bandwidth of the source resonator based on real-time coupling conditions and distance variations, allowing optimal performance across varying operating conditions while maintaining stability
Solution Approach 2:
The patent changes the resonance bandwidth parameter of the source resonator to resolve the contradiction. By adjusting this parameter according to coupling coefficient and distance conditions, the system achieves both efficient power transfer and robustness against variations
2Reliability
If the resonance bandwidth is widened to improve stability against distance variations, then reliability improves, but power transfer efficiency decreases under ideal matching conditions
Solution Approach 1:
The system dynamically adjusts the resonance bandwidth based on real-time coupling conditions. When coupling is strong and distance is optimal, the bandwidth is narrowed for maximum efficiency. When coupling varies or distance changes, the bandwidth is widened to maintain stability and reliable power transfer
Solution Approach 2:
The system performs preliminary measurement of coupling conditions and distance, then pre-adjusts the resonance bandwidth before power transfer begins. This preliminary action ensures the system is optimally configured to handle upcoming variations, maintaining both efficiency and reliability
3Loss of energy
If impedance matching is optimized for maximum power transfer, then efficiency improves, but the system becomes sensitive to impedance mismatching when distance changes
Solution Approach 1:
The patent implements dynamic impedance matching by continuously adjusting the resonance bandwidth in response to changing distance and coupling conditions. This dynamic adaptation maintains both high efficiency and adaptability across varying operating scenarios
Solution Approach 2:
The system uses feedback from coupling coefficient measurements and distance detection to continuously adjust the resonance bandwidth. This feedback mechanism ensures the system adapts to impedance changes while maintaining optimal power transfer efficiency
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 stabilizes wireless power transmission efficiency by maintaining an unbalanced relationship between the resonance bandwidth of the source and target resonators, preventing efficiency reduction due to changes in coupling coefficient, distance, and impedance mismatching, thereby ensuring consistent power transfer.
Implementation Method 1
a source resonator (115) configured to transfer electromagnetic energy to a target resonator (121) through magnetic coupling (101)
Implementation Method 2
transfer the generated resonance power to the target device (120) through magnetic coupling (101) with a target resonator (121)
Implementation Method 3
a source resonator (115) configured to transfer electromagnetic energy to a target resonator (121) through magnetic coupling (101) at a resonance frequency
Data Source
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AI summary
Provided are a method and apparatus for controlling a resonance bandwidth in a wireless power transmission system. The apparatus may include a source resonator to transfer an electromagnetic energy to a target resonator, and a source resonance bandwidth setting unit to set a resonance bandwidth of the source resonator.