Dual-Loop In-Phase Feeding Wireless Power Transmission
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Solution Overview
Problem
Existing wireless power transmission systems with dual-loop single feeding methods face reduced power transmission efficiency due to sequential excitation of resonant coils, limiting the receiving space and causing power loss during switching operations.
Innovation Solution
Implementing a dual-loop in-phase feeding method where two resonators with feeding loops are connected in parallel or series, allowing magnetic fields to be excited in the same direction and phase, with current flowing in the same direction, to create a wider receiving space with improved power transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If dual-loop single feeding method is used with one shorted loop and one normal loop, then device complexity is reduced, but power transmission efficiency deteriorates when receiver is positioned near the shorted loop
Solution Approach 1:
The patent combines two feeding loops (first and second feeding loops) to operate simultaneously in an in-phase manner, merging their magnetic field contributions to create a unified transmitting system that maintains high power transmission efficiency across the entire receiving space, eliminating the efficiency loss problem of the shorted loop approach
2Device complexity
If dual-loop single feeding method is used with sequential excitation, then device complexity is reduced, but receiving space is limited
Solution Approach 1:
The patent merges the operational zones of two feeding loops by exciting them simultaneously in-phase, creating a combined transmitting system that expands the effective receiving space to cover the entire area between the loops, rather than limiting it to zones near individual loops
Solution Approach 2:
The patent ensures continuous useful action across the entire receiving space by maintaining in-phase excitation of both feeding loops simultaneously, eliminating dead zones and ensuring uninterrupted power transmission throughout the expanded receiving area
3Device complexity
If dual-loop single feeding method is used with switching operations, then device complexity is reduced, but power loss increases during switching
Solution Approach 1:
The patent eliminates switching operations by maintaining continuous in-phase excitation of both feeding loops simultaneously, ensuring uninterrupted power transmission and eliminating the power losses that occur during switching transitions in the single feeding method
4Ease of operation
If receiver position is not precisely controlled in existing system, then ease of operation is improved, but power transmission efficiency deteriorates
Solution Approach 1:
The patent creates a merged transmitting system with two in-phase feeding loops that generates a unified magnetic field distribution, providing a broad and uniform receiving space that maintains high power transmission efficiency across various receiver positions, thereby providing positioning autonomy without sacrificing efficiency
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 approach enhances power transmission efficiency and expands the receiving space, maintaining high efficiency regardless of the receiver's position relative to the transmitter resonators, reducing power loss and improving autonomy in positioning.
Implementation Method 1
a first resonator configured to comprise a first feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the first feeding loop, and a second resonator configured to comprise a second feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the second feeding loop, wherein the first and second feeding loops are formed in a manner that allows magnetic fields respectively generated by the first and second resonators to be excited in the same direction and in phase
Implementation Method 2
a relay resonator configured to have a resonant frequency identical with that of the transmitter resonator and store energy in a specific space by generating mutual resonance through a resonance characteristic with the transmitter resonator
Data Source
AI summary
Provided are wireless power transmitting method and apparatus using dual-loop in-phase feeding. The wireless power transmitting apparatus includes a generator configured to generate a Radio Frequency (RF) signal, an amplifier configured to amplify the generated RF signal, a matching circuit configured to be connected to the amplifier to perform impedance matching, a first resonator configured to comprise a first feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the first feeding loop, and a second resonator configured to comprise a second feeding loop connected to the matching circuit and transmit wireless power using a signal provided through the second feeding loop, wherein the first and second feeding loops are formed in a manner that allows magnetic fields respectively generated by the first and second resonators to be excited in the same direction and in phase.