Wireless Power Transmitter Resonance Frequency and Impedance Control
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Solution Overview
Problem
In wireless power transmission systems, variations in the distance between source and target resonators lead to reduced power transmission efficiency due to mismatching, which existing technologies fail to effectively address.
Innovation Solution
A wireless power transmitter system that includes a power generator, a source resonator, a mismatching detector, and a controller to adjust the resonance frequency or impedance of a repeater resonator for impedance matching between the source and target resonators, using tracking power and voltage standing wave ratio (VSWR) to detect and correct mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distance between source resonator and target resonator varies, then the system can adapt to different transmission distances, but power transmission efficiency decreases due to mismatching
Solution Approach 1:
The patent implements dynamic adjustment of resonance frequency and impedance parameters. The controller continuously monitors transmission conditions and adjusts the resonance frequency of the source resonator and the impedance of the repeater resonator in real-time to maintain optimal coupling despite distance variations, thereby preventing efficiency loss while preserving adaptability
Solution Approach 2:
The system employs feedback mechanisms where the controller detects mismatching conditions between resonators and automatically adjusts resonance frequency and impedance parameters based on the detected transmission state. This closed-loop control ensures that power transmission efficiency is maintained across varying distances by continuously optimizing the coupling conditions
2Loss of energy
If resonance frequency and impedance are dynamically adjusted, then power transmission efficiency is maintained, but device complexity increases
Solution Approach 1:
The controller performs multiple functions including detecting mismatching conditions, adjusting resonance frequency, and modifying impedance parameters within a single integrated unit. The repeater resonator also serves dual purposes by providing both signal amplification and impedance matching. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while maintaining high transmission 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 enhances power transmission efficiency by dynamically adjusting resonance frequency and impedance to maintain optimal coupling, reducing losses and improving power delivery stability across varying distances.
Implementation Method 1
Wireless power refers to energy that is transferred from a wireless power transmitter to a wireless power receiver, for example, through a magnetic coupling or a resonance coupling
Implementation Method 2
The magnetic coupling or the resonance coupling may be formed between the source resonator and the target resonator
Implementation Method 3
a repeater resonator used to perform an impedance matching between the target resonator and the source resonator
Implementation Method 4
The mismatching detector may detect a reflected wave of the tracking power, and may detect the mismatching between the target resonator and the source resonator based on the detected reflected wave
Implementation Method 5
a power generator configured to generate tracking power using a resonance frequency, the tracking power being used for a resonance frequency tracking
Data Source
AI summary
A wireless power transmission system, and a method for controlling a resonance impedance and a resonance frequency of the wireless power transmission system are provided. According to one aspect, a wireless power transmitter may include: a power generator configured to generate tracking power using a resonance frequency, the tracking power being used for a resonance frequency tracking; a source resonator configured to transmit the tracking power to a target resonator; a mismatching detector configured to detect a mismatching between the target resonator and the source resonator; and a controller configured to adjust the resonance frequency, or an impedance of a repeater resonator when the mismatching is detected, the repeater resonator being used to perform an impedance matching between the target resonator and the source resonator.