Wireless Power Receiver Phase Feedback for Faster RF Alignment
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Solution Overview
Problem
Conventional electromagnetic-wave based wireless power transmission systems take a long time to determine the location of a power receiver due to the need to receive multiple pieces of information about power reception from multiple RF waves formed in various directions.
Innovation Solution
A wireless power reception device and transmission device that sequentially receive and transmit RF waves, identifying strength and phase information to determine an optimum phase value for maximum strength, allowing for efficient power transmission by reducing the time required to configure the phase of RF waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wireless power transmission device forms RF waves in multiple directions and receives multiple pieces of power reception information to determine the location of a power receiver, then the location determination accuracy is improved, but the time required for power transmission increases
Solution Approach 1:
The system performs preliminary actions by having the power receiver proactively measure and report power reception information for multiple RF wave directions in advance, before the transmitter needs to determine the optimal power transmission direction. This eliminates the sequential measurement process and allows the transmitter to immediately utilize the pre-collected data for efficient power transmission.
2Measurement precision
If the wireless power transmission device receives multiple pieces of information about power reception from multiple RF waves, then the accuracy of power reception determination is improved, but the complexity of the system increases
Solution Approach 1:
The power receiver performs self-service by autonomously measuring power reception information for multiple RF wave directions and reporting it to the transmitter. This shifts the measurement burden from the transmitter to the receiver, simplifying the transmitter's functionality while maintaining high measurement precision through the receiver's self-conducted measurements.
3Productivity
If the wireless power transmission device sequentially receives multiple RF waves to determine the optimum phase, then the power transmission efficiency is improved, but the time required for configuration increases
Solution Approach 1:
The power receiver performs preliminary measurements of power reception information for multiple RF wave directions before the transmitter configures the optimal transmission parameters. This advance measurement allows the transmitter to quickly determine the optimum phase and direction without sequential testing, significantly reducing configuration time while maintaining high power transmission 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 significantly reduces the time needed for the wireless power transmission device to receive information about power reception and configure the optimum phase, enhancing the efficiency of wireless power transmission and reception.
Implementation Method 1
at least one power reception antenna configured to sequentially receive a plurality of different RF waves formed by a wireless power transmission device
Implementation Method 2
identify a plurality of pieces of phase information corresponding to respective ones among the plurality of different RF waves; identify, based on the plurality of pieces of strength information and the plurality of pieces of phase information, an optimum phase value allowing a received RF wave to have a maximum strength
Data Source
AI summary
A wireless power receiving device, according to the disclosure, comprises: at least one power receiving antenna for sequentially receiving a plurality of different RF waves formed by a wireless power transmitting device; a communication circuit; and at least one processor, wherein the at least one processor is configured to confirm a plurality of pieces of strength information that indicates the strength of each of the plurality of different RF waves, confirm a plurality of pieces of phase information corresponding to each of the plurality of different RF waves, confirm, on the basis of the plurality of pieces of strength information and the plurality of pieces of phase information, an optimum phase value such that a received RF wave has a maximum strength, and transmit a communication signal including information about the optimum phase value to the wireless power transmitting device through the communication circuit. Additional various embodiments are possible.