Wireless Power Relay Coil Impedance Design for Voltage Control
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Solution Overview
Problem
In wireless power transmission systems using magnetic resonance, relay coils can experience high voltage induction due to changes in the location or number of wireless power receivers, potentially damaging capacitors and disrupting power transmission.
Innovation Solution
The wireless power relay device employs relay coils with specific design parameters such as higher impedance, lower resistance, fewer turns, greater mutual inductance, and closer proximity to neighboring coils at critical points to manage and mitigate high voltage induction, thereby preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If relay coils are used to extend wireless power transmission range through magnetic resonance, then transmission distance and flexibility are improved, but high voltage induction occurs at specific relay coil locations which can damage capacitors
Solution Approach 1:
The patent applies local quality by differentiating the number of turns in relay coils based on their position. Relay coils at end locations have fewer turns while intermediate relay coils have more turns, creating non-uniform structural properties tailored to the specific voltage induction risks at different locations in the transmission chain.
Solution Approach 2:
The patent changes the structural parameter (number of turns) of relay coils to control impedance and mitigate high voltage induction. By adjusting the number of turns, the impedance of each relay coil is optimized for its position, preventing overvoltage conditions that would damage capacitors while maintaining efficient power transmission.
2Power
If the number of turns of relay coils is increased to handle higher power transmission, then power transmission capability is improved, but impedance increases which can cause overvoltage at specific locations
Solution Approach 1:
The patent implements local quality by assigning different numbers of turns to relay coils based on their position in the transmission chain. Intermediate relay coils have more turns for higher power handling, while end relay coils have fewer turns to maintain voltage stability, creating a gradient structure optimized for both power transmission and voltage control.
Solution Approach 2:
The patent changes the number of turns parameter of relay coils to simultaneously achieve adequate power transmission capability and controlled impedance. This parameter adjustment creates a distributed impedance profile along the transmission chain that prevents voltage spikes while maintaining efficient power transfer.
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 effectively reinforces relay coils against high voltage induction, ensuring reliable and efficient wireless power transmission by optimizing impedance and mutual inductance values at vulnerable points.
Implementation Method 1
The magnetic resonance method is a technique of transmitting non-radial magnetic-field energy between two resonators spaced from each other through resonant coupling
Implementation Method 2
The magnetic induction method is a technique using magnetic inductive coupling between adjacent coils
Data Source
AI summary
The present invention is mainly directed to providing a wireless power relay device and a wireless power transmission system, which are capable of reinforcing a relay coil in which a high voltage is induced among a plurality of relay coils, thereby preventing the relay coil from being damaged due to the induction of the high voltage.