Resonance Circuit Dynamic Impedance Matching
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Solution Overview
Problem
Conventional wireless power supply systems using resonance circuits suffer from insufficient power transmission efficiency due to fixed connections of resonance coils and capacitors, which do not adapt to varying impedances on the power supply and receipt sides.
Innovation Solution
A power supply system with a changeover unit that dynamically switches the connection of resonance coils and capacitors between series and parallel configurations based on detected impedances, utilizing a detector and changeover controller to optimize power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the connection of resonance coil and capacitor is fixed (series or parallel), then the circuit structure is simple, but the power transmission efficiency is insufficient when impedance varies
Solution Approach 1:
The patent applies the dynamics principle by making the connection configuration between the resonance coil and capacitor changeable rather than fixed. A changeover unit switches between series connection and parallel connection based on detected impedance values, allowing the circuit to adapt dynamically to varying impedance conditions on the power supply side or power receipt side, thereby optimizing power transmission efficiency across different operating scenarios.
Solution Approach 2:
The patent implements parameter changes by varying the connection configuration (series or parallel) of the resonance coil and capacitor according to impedance parameters. The changeover controller adjusts the connection type based on detected impedance values, changing the electrical parameters of the resonance circuit to match the impedance conditions, thus resolving the contradiction between fixed simple structure and adaptive high efficiency.
2Loss of energy
If the connection type is changed to adapt to impedance variations, then the power transmission efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent makes the resonance circuit configuration dynamic by introducing a changeover unit that can switch between series and parallel connections. This dynamic adjustment is controlled based on impedance detection, allowing the system to optimize power transmission efficiency while managing the added complexity through automated control rather than manual intervention.
Solution Approach 2:
The patent implements feedback control by using a detector to monitor impedance on the power supply side or power receipt side, and a changeover controller to adjust the connection configuration based on the detected values. This closed-loop feedback system automatically optimizes power transmission efficiency without requiring complex manual adjustments, balancing the trade-off between improved efficiency and increased device complexity.
3Loss of energy
If series connection is used, then the circuit is simple, but the power transmission efficiency is low when impedance is high
Solution Approach 1:
The patent changes the electrical parameters of the resonance circuit by switching between series and parallel connections based on impedance conditions. When impedance is detected to be high, the system switches to parallel connection to maintain optimal power transmission efficiency, whereas series connection is used when impedance is low, thus adapting the circuit parameters to match the operating conditions.
4Loss of energy
If parallel connection is used, then the power transmission efficiency is high when impedance is high, but the circuit complexity increases
Solution Approach 1:
The patent makes the circuit configuration dynamic by allowing switching between series and parallel connections based on real-time impedance detection. The parallel connection is activated when high impedance is detected to optimize power transmission efficiency, while the system reverts to series connection when impedance is low, thus managing circuit complexity through conditional configuration rather than permanent complexity.
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
The system improves power transmission efficiency by adapting the connection type to match changing impedances, ensuring high efficiency regardless of variations in impedance on the power supply and receipt sides.
Implementation Method 1
non-contact power supply being conducted by electromagnetic resonance in the pair of resonance circuits
Implementation Method 2
a power supply system and a resonance circuit including a pair of resonance coils configured to conduct non-contact power supply by magnetic field resonance
Data Source
AI summary
Primary and secondary resonance circuits and include primary and secondary resonance coils and primary and secondary capacitors, respectively. Non-contact power supply is conducted by electromagnetic resonance of the primary and secondary resonance circuits and. A changeover circuit changes over connection of the secondary resonance coil and the secondary capacitor to a series connection or a parallel connection. A detection circuit detects impedance on a power receipt side. A changeover control circuit controls changeover conducted by the changeover circuit, depending upon the impedance detected by the detection circuit.