Phase-Shifter Resonator Layout for Stable Wireless Power Transfer
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Solution Overview
Problem
In non-contact power supply systems using magnetic resonance, changes in the positional relationship between resonators result in varying coupling coefficients, leading to fluctuations in transmission characteristics, which complicates the power transfer mechanism and requires additional control.
Innovation Solution
An alternating current signal transfer apparatus is designed with a transmission line, multiple first phase shifters, resonator pairs connected to the phase shifters, and additional second phase shifters, where the second phase shifters are connected at a specific point to maintain consistent coupling coefficients across resonator pairs, even when the positional relationship changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coupling coefficient k is changed due to changes in the distance between resonators, then the transmission characteristics change significantly, but this requires adjustment of circuit parameters such as capacitance values, which complicates the mechanism and requires additional control
Solution Approach 1:
The patent applies dynamics by making the capacitance values adjustable rather than fixed. The capacitance values are dynamically changed according to the coupling coefficient k to maintain optimal transmission characteristics. This is achieved through switching mechanisms that can change the capacitance configuration based on the detected coupling condition, allowing the system to adapt to varying distances between resonators without requiring complex mechanical adjustments
Solution Approach 2:
The patent directly changes the electrical parameter (capacitance value) in response to changes in the coupling coefficient. By adjusting the capacitance values connected to the resonators, the system compensates for variations in coupling strength caused by distance changes, thereby maintaining stable transmission characteristics. This parameter adjustment is controlled based on detected coupling conditions
2Reliability
If the coupling coefficient k is changed due to changes in the distance between resonators, then the transmission characteristics change significantly, but this requires adjustment of circuit parameters, which increases the control requirements
Solution Approach 1:
The patent implements feedback by detecting the coupling coefficient k and using this information to control the adjustment of capacitance values. The system continuously monitors the coupling condition between resonators and automatically adjusts the capacitance configuration to maintain optimal power transfer efficiency. This closed-loop control reduces the need for complex external control systems while maintaining high efficiency
Solution Approach 2:
The system performs self-adjustment by automatically changing its own capacitance parameters in response to detected coupling conditions. The resonator system essentially regulates itself by switching between different capacitance configurations based on the coupling coefficient, reducing the burden on external control systems and simplifying the overall automation requirements
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 configuration allows for high-efficiency power transfer while maintaining stability in transmission characteristics, even with changes in the positional relationship between resonators, thus simplifying the mechanism and reducing the need for complex control systems.
Implementation Method 1
power supply by magnetic resonance between resonators
Implementation Method 2
magnetic resonance between resonators
Implementation Method 3
first phase shifters connected to the transmission line at a branching point; and a plurality of second phase shifters each connected to each of the plurality of resonator pairs
Data Source
AI summary
An alternating current signal transfer apparatus includes: a transmission line; a plurality of first phase shifters connected to the transmission line at a branching point; a plurality of resonator pairs including a power transmitting coil and a power receiving coil and each connected to each of the plurality of first phase shifters; and a plurality of second phase shifters each connected to each of the plurality of resonator pairs. The plurality of second phase shifters are connected at a connecting point.