Wireless Power Repeater for Efficient Energy Transfer
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Summary
Problems
In wireless power transmission, the coupling coefficient between the transmitter and receiver coils is often below the critical value due to the size difference between the transmission and reception resonant coils, leading to inefficient power transfer, with magnetic induction prevailing over resonance, preventing effective energy transmission.
Innovation solutions
A wireless power repeater system that includes a position detector and a controller to operate a specific repeater resonator closest to the extension line connecting the transmitter and receiver, enhancing the coupling coefficient and concentrating power transmission in a specific direction.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the size of the reception resonant coil is made smaller, then the portability and ease of use of the wireless power receiver is improved, but the coupling coefficient between the transmitter and receiver becomes very small, making effective wireless power transmission impossible
Why choose this principle:
The patent introduces a repeater resonator as an intermediary device between the wireless power transmitter and receiver. This repeater resonator acts as a mediator that receives power from the transmitter and re-transmits it to the receiver, enabling effective power transmission even when the direct coupling coefficient between transmitter and receiver is too small due to the small size of the reception coil.
Principle concept:
If the distance between the transmitter and receiver is increased, then the coverage area and versatility of the wireless power system is improved, but the coupling coefficient decreases, preventing effective power transmission
Why choose this principle:
The repeater resonator serves as an intermediary that extends the effective transmission distance. By positioning the repeater resonator between the transmitter and receiver, the system can maintain sufficient coupling coefficients at each stage (transmitter-repeater and repeater-receiver) even when the overall distance is large, thereby expanding the coverage area.
Application Domain
Data Source
AI summary:
A wireless power repeater system that includes a position detector and a controller to operate a specific repeater resonator closest to the extension line connecting the transmitter and receiver, enhancing the coupling coefficient and concentrating power transmission in a specific direction.
Abstract
A wireless power repeater for relaying power transmission between a wireless power transmitter and a wireless power receiver according to the embodiment includes a position detector for detecting a position of the wireless power receiver, a repeater resonator unit including a plurality of repeater resonators, and a controller for operating a specific repeater resonator, which is located closest to an extension line of the wireless power transmitter and the wireless power receiver, based on position information detected by the position detector.