Resonator Line Width Spacing for Wireless Power Metal Interference
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Solution Overview
Problem
Conventional wireless power transmitters and receivers are affected by peripheral metal objects, which change the high-frequency characteristics of the resonator, leading to reduced efficiency and potential loss of power transmission functionality.
Innovation Solution
A wireless power transmitter and receiver design that includes a resonator with a metal layer spaced apart by a preset interval, where the line width of the resonator is smaller than the interval, minimizing the use or eliminating the need for electromagnetic shielding members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic shielding members are used to block the effect of peripheral metal objects, then the resonator characteristics are protected, but the device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the electromagnetic shielding member from the wireless power transmitter structure. By redesigning the resonator to inherently withstand metal object interference through optimized geometric parameters (line width smaller than spacing to metal objects), the patent removes the need for separate shielding components, thereby reducing device complexity while maintaining resonator characteristic stability
Solution Approach 2:
The resonator is designed to self-protect against metal object interference through its intrinsic geometric configuration. The specific design where the line width is smaller than the spacing to metal objects enables the resonator to maintain its high-frequency characteristics without external shielding, making the system self-sufficient and eliminating the need for additional protective components
2Loss of energy
If electromagnetic shielding members are used to prevent metal object interference, then the power transmission efficiency is maintained, but the manufacturing cost increases
Solution Approach 1:
The invention removes the electromagnetic shielding member from the system, eliminating the associated manufacturing costs. The resonator is redesigned with specific geometric parameters (line width smaller than spacing to metal objects) that inherently maintain power transmission efficiency without requiring expensive shielding materials and assembly processes
Solution Approach 2:
The invention replaces expensive electromagnetic shielding members with a cost-effective resonator design that uses standard materials and simpler manufacturing processes. The geometric optimization approach requires no additional materials or complex assembly steps, significantly reducing manufacturing costs while maintaining energy transmission efficiency
3Loss of energy
If the resonator line width is increased to improve power transmission, then the power transmission efficiency improves, but the resonator becomes more sensitive to metal object interference
Solution Approach 1:
The invention optimizes the resonator's geometric parameters, specifically setting the line width to be smaller than the spacing to metal objects. This parameter configuration creates an optimal balance where the resonator maintains sufficient power transmission efficiency while being less sensitive to metal object interference, as the smaller line width reduces the coupling effect with nearby metal objects
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 design maintains the impedance and efficiency of the resonator, ensuring consistent power transmission characteristics even when metal objects are present, while reducing manufacturing costs by minimizing the use of shielding members.
Implementation Method 1
a system is known in which electrical power is wirelessly transferred using a resonance scheme power transmission principle referred to as coupled mode theory
Implementation Method 2
The wireless charging technology includes an electromagnetic induction scheme using a coil
Implementation Method 3
An electromagnetic shielding member may be employed in order to solve the above-mentioned problems
Data Source
AI summary
Disclosed is a wireless power transmitter that includes a resonator that provides charging electric power to a wireless power receiver and a metal layer spaced apart from the resonator by a preset interval, with a line width of the resonator being smaller than the preset interval between the resonator and the metal layer.