Resonance Frequency Adjuster for Constant-Frequency Wireless Power
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Solution Overview
Problem
Conventional wireless power transmission systems require frequent adjustments in transmission frequency due to changes in resonator size or the presence of objects inside the resonator, leading to complex circuit designs and potential impedance mismatch issues.
Innovation Solution
A wireless power transmission system incorporating a resonance frequency adjuster with a conductive protrusion and a transmission line, allowing for constant resonance frequency operation regardless of resonator size or object presence, by adjusting the electrical length of the resonance frequency adjuster.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the resonance frequency is adjusted according to resonator size and object presence, then power transfer efficiency is improved, but circuit design complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the relationship between resonator parameters (size, object presence) and optimal resonance frequencies in a lookup table. The system performs frequency adjustment by simply retrieving pre-computed values based on detected resonator characteristics, rather than performing complex real-time frequency optimization calculations. This reduces computational complexity while maintaining high power transfer efficiency.
2Loss of energy
If the transmission frequency is changed for each resonator size, then power transmission efficiency is improved, but impedance mismatch issues occur
Solution Approach 1:
The patent implements feedback by continuously monitoring the resonator's actual resonance frequency and adjusting the transmission frequency accordingly. The system detects changes in resonator characteristics (size, object presence) and uses this feedback to dynamically tune the transmission frequency to match the current resonant condition, thereby maintaining both high efficiency and proper impedance matching.
Solution Approach 2:
The patent applies parameter changes by adjusting the transmission frequency parameter based on detected resonator characteristics. The system changes the operating frequency parameter to match the resonant frequency determined by the current resonator configuration, ensuring optimal power transfer while maintaining impedance matching through coordinated parameter adjustment.
3Adaptability or versatility
If the circuit is re-designed for each desired resonance frequency, then power transmission adaptability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies dynamics by making the transmission frequency dynamically adjustable through electronic control rather than requiring physical circuit redesign. The system uses variable frequency oscillators and programmable frequency synthesis to adapt to different resonator configurations, enabling frequency flexibility while maintaining a standardized, easily manufacturable circuit platform.
Solution Approach 2:
The patent implements universality by designing a single standardized circuit platform that can operate at multiple frequencies through electronic configuration. The universal circuit design incorporates programmable frequency control and adaptive impedance matching that works across different resonator sizes and configurations, eliminating the need for custom circuit designs for each frequency requirement while maintaining full adaptability.
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
Enables efficient wireless power transmission at a constant frequency, simplifying circuit design and reducing impedance mismatch issues, thereby improving power transfer efficiency and adaptability to varying environments.
Implementation Method 1
a space surrounded by an electrical conductor is used to resemble a resonator. Such a system performs wireless power transmission, using electromagnetic waves set at a resonance frequency determined according to the resonator size and resonance mode
Implementation Method 2
electromagnetic waves are emitted from a power transmission unit at a resonance frequency specific to the resonator so as to transmit power to a power receiver in the resonator
Data Source
AI summary
A wireless power transmission system includes a structure entirely surrounded by an electromagnetic wave shielding member having appropriate electrical conductivity and appropriate frequency selectivity; at least one power receiving unit; at least one power transmission unit; and at least one resonance frequency adjuster. The resonance frequency adjuster includes at least one conductive protrusion having an open end and a transmission line connected to another end of the conductive protrusion at one end of the transmission line, wherein the open end of the conductive protrusion is arranged inside the structure, and the transmission line is electrically connected to the electromagnetic wave shielding member defining a wall surface of the structure at another end not connected to the conductive protrusion.