Wireless Power Resonator Switching for Efficiency
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Solution Overview
Problem
Existing wireless power transmission technologies face inefficiencies in charging electronic devices due to limitations in wired power supplies and battery capacities, particularly in near-field wireless power transmission systems where resonance isolation systems struggle to optimize energy transfer efficiently.
Innovation Solution
A wireless power transmission apparatus featuring a resonator connected to a power supply unit via a switching unit, controlled by a controller that senses current flow and adjusts the connection based on predetermined current levels, ensuring efficient energy transfer through mutual resonance between source and target resonators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a resonance isolation system is used for near-field wireless power transmission, then power can be transmitted wirelessly to overcome wired power supply inconvenience, but charging efficiency is reduced due to inability to optimize energy transfer
Solution Approach 1:
The patent applies dynamics by making the switching unit dynamically controllable based on real-time current sensing. The switching unit transitions between connected and disconnected states according to whether the current exceeds the threshold value, enabling adaptive optimization of energy transfer during wireless power transmission, thereby resolving the contradiction between wireless operation convenience and charging efficiency
Solution Approach 2:
The patent implements feedback through the current sensor that continuously monitors the current flowing through the resonator and provides this information to the controller. This feedback mechanism enables the system to adjust the switching unit's state based on actual operating conditions, optimizing energy transfer efficiency while maintaining wireless power transmission capability
2Duration of action of stationary object
If continuous power supply to resonator is maintained, then wireless power transmission can be sustained, but power loss increases due to excessive current flow
Solution Approach 1:
The patent applies periodic action by implementing intermittent power supply through the switching unit that alternates between connected and disconnected states. Rather than continuous power supply, the system periodically connects and disconnects based on current threshold detection, which sustains wireless power transmission while reducing power loss from excessive continuous current flow
Solution Approach 2:
The patent extracts the excess current component by using the switching unit to disconnect the resonator from the power supply unit when current exceeds the threshold value. This extraction of problematic current flow reduces power loss while maintaining the essential power transmission function through controlled intermittent operation
3Loss of energy
If switching unit is added to control current flow, then power loss is reduced through optimized energy transfer, but device complexity increases
Solution Approach 1:
The patent introduces an intermediary current sensor between the power supply unit and the resonator. This intermediary component monitors current flow and provides information to the controller, enabling intelligent control of the switching unit. The current sensor acts as a mediator that enables power loss reduction through current-based control without requiring complex control algorithms
Solution Approach 2:
The patent implements self-service through the autonomous operation of the switching unit controlled by real-time current sensing. The system automatically connects and disconnects the resonator based on whether the current exceeds the threshold value, without requiring external intervention or complex control systems. This self-regulating mechanism reduces power loss while maintaining relatively simple device architecture
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 charging efficiency by precisely controlling the flow of current and voltage, reducing power loss and extending the range of wireless power transmission without the need for impedance matching, making it suitable for various electronic devices and applications.
Implementation Method 1
a resonator configured to transmit power... mutual resonance between source and target resonators
Implementation Method 2
a current sensor configured to sense the amount of the current... a comparator configured to compare voltage corresponding to the mirrored current
Data Source
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AI summary
A wireless power transmission apparatus for high efficiency energy charging includes a resonator configured to transmit power, a power supply unit configured to supply power to the resonator, a first switching unit configured to connect the resonator to the power supply unit, and disconnect the resonator from the power supply unit, and a controller configured to control the first switching unit based on voltage applied to an input resistor of the power supply unit.