Self-Adaptive Matching for Magnetic Resonance Wireless Charging
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Solution Overview
Problem
Magnetic-resonance wireless charging systems face inefficiencies due to overcoupling at close distances and undercoupling at farther distances, leading to poor transmission efficiency between receiving and transmitting antennas.
Innovation Solution
A self-adaptive matching system that includes Bluetooth-communication and control circuits, switching circuits, regulator circuits, and radio-frequency power amplifier circuits, which collect information and switch between different antenna matching solutions using a switch array circuit to optimize matching for varying distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the distance between transmitting and receiving antennas is reduced to improve coupling, then transmission efficiency improves, but overcoupling phenomenon occurs causing instability
Solution Approach 1:
The patent implements dynamic switching between different matching circuits based on real-time detection of coupling conditions. The system transitions from a static matching approach to a dynamic one where the matching circuit is automatically adjusted according to the actual distance and coupling state between antennas, thereby maintaining optimal performance across varying conditions without causing overcoupling instability.
Solution Approach 2:
The patent changes the impedance parameters of the matching circuit by switching between different circuit configurations. By adjusting the matching circuit parameters (impedance values, component configurations) based on detected coupling conditions, the system optimizes power transmission efficiency while preventing overcoupling effects that would cause instability.
2Adaptability or versatility
If the distance between transmitting and receiving antennas is increased to expand charging range, then spatial freedom improves, but undercoupling phenomenon occurs reducing transmission efficiency
Solution Approach 1:
The system dynamically adjusts the matching circuit configuration based on the detected distance and coupling conditions. When antennas are farther apart causing undercoupling, the system automatically switches to a matching circuit configuration optimized for longer distances, thereby maintaining transmission efficiency across the expanded charging range without significant energy loss.
Solution Approach 2:
The patent employs parameter changes in the matching circuit to adapt to varying transmission distances. By switching between different impedance configurations and component values in the matching circuit, the system compensates for the effects of increased distance and maintains optimal power transfer efficiency across the full charging range.
3Device complexity
If a fixed matching circuit is used to simplify system design, then device complexity reduces, but performance degrades under varying distance conditions
Solution Approach 1:
The patent divides the matching circuit into multiple discrete, switchable segments or configurations. Instead of a single fixed circuit, the system uses multiple matching circuit configurations that can be selectively activated based on operating conditions. This segmented approach allows the system to maintain relatively simple individual circuit designs while achieving superior overall performance through selective configuration switching.
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 significantly improves transmission efficiency by addressing overcoupling and undercoupling issues, ensuring effective energy transfer across different distances between antennas.
Implementation Method 1
magnetic resonance coupling technology has found recent application in an intelligent wear device, a floor mopping robot, an automatic guided vehicle (AGV) and other apparatus
Implementation Method 2
The second type is a magnetic resonance coupling technology made popular by the Airfuel alliance
Data Source
AI summary
A self-adaptive matching system for a magnetic-resonance wireless charging process includes a transmitting Bluetooth-communication and control circuit, a transmitting switching circuit, a regulator circuit, a transmitting antenna, a radio-frequency power amplifier circuit, a receiving Bluetooth-communication and control circuit, a receiving antenna, a receiving switching circuit and a rectifier and regulator circuit. The transmitting switching circuit, the regulator circuit and the transmitting antenna are connected to the transmitting Bluetooth-communication and control circuit, respectively. The radio-frequency power amplifier circuit is connected to the transmitting switching circuit and the regulator circuit, respectively. The regulator circuit is connected to the transmitting switching circuit. The receiving antenna, the receiving switching circuit and the rectifier and regulator circuit are connected to the receiving Bluetooth-communication and control circuit, respectively. The rectifier and regulator circuit is connected to the receiving switching circuit, and the receiving antenna is coupled with the transmitting antenna.