PTU Resonator Frequency Analysis for PRU Location Detection
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Solution Overview
Problem
Wireless power transmission systems face inefficiencies due to varying charging environments caused by the relative location of power transmitting and receiving units, leading to deviations in transmission efficiency.
Innovation Solution
A power transmitting unit (PTU) with a resonator and controller determines the location of a power receiving unit (PRU) by analyzing frequency information and coupling coefficients, allowing for precise determination of the PRU's position within a charging area and optimizing power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If wireless power transmission is performed without location determination, then power transmission can be initiated, but transmission efficiency varies due to varying charging environments caused by relative location
Solution Approach 1:
The system uses feedback from the PRU's response signal containing location information to adjust and optimize power transmission. The PTU receives the response signal, determines the PRU's location based on frequency information, and uses this feedback to maintain optimal transmission efficiency by adjusting transmission parameters according to the determined location within the charging area.
Solution Approach 2:
The patent replaces complex mechanical or geometric location detection systems with a signal-based approach using frequency information from resonant communication. Instead of using physical sensors or complex positioning hardware, the system uses the resonant frequency characteristics of the PRU's response signal to determine location, simplifying the device complexity while maintaining transmission efficiency.
2Adaptability or versatility
If the charging area is enlarged to accommodate various locations, then adaptability improves, but power transmission efficiency decreases due to varying charging environments
Solution Approach 1:
The system divides the charging area into specific location zones and applies localized transmission optimization. By determining the PRU's specific location within the charging area using frequency information, the PTU can adjust transmission parameters according to the local charging environment, maintaining high efficiency across different locations within the extended charging area rather than using a uniform transmission approach.
3Measurement precision
If frequency information analysis is used to determine PRU location, then location determination precision improves, but measurement complexity increases
Solution Approach 1:
The PRU's response signal inherently contains frequency information that reveals its location within the charging area. The system uses this self-contained information in the resonant communication protocol itself, without requiring additional measurement devices or complex external analysis systems. The frequency characteristics of the response signal automatically provide location data that the PTU can extract using standard resonant frequency detection methods.
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 wireless power transmission efficiency by ensuring accurate placement of the PRU within the charging area, maintaining high efficiency across different charging environments and locations.
Implementation Method 1
a resonating unit including a resonator and configured to transmit a power to a power receiving unit (PRU) that mutually resonates with the resonator at a resonant frequency of the resonator
Implementation Method 2
a controller configured to determine whether the PRU is located within a charging area of the PTU based on frequency information corresponding to an inflection point on a curve of electrical characteristics of the resonator
Data Source
AI summary
A power transmitting unit (PTU) transmits a power wirelessly based on a location of a power receiving unit (PRU). The PTU determines whether the PRU is located within a charging area of the PTU based on frequency information corresponding to an inflection point detected on a curve of electrical characteristics of a resonator of the PTU.