Position Misalignment Detection in Wireless Power Transfer
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Solution Overview
Problem
In non-contact power supply systems, detecting position misalignment between the transmitter and receiver during charging is challenging, leading to reduced charging efficiency and difficulty in identifying misalignment due to constant voltage and current levels.
Innovation Solution
A position misalignment detection device comprising a comparator, frequency counter, and register that compares induced electric current and transmit frequency to detect misalignment, enabling feedback for adjusting the receiver's position during charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If non-contact power supply transmitter method is used, then power transmission is achieved without contact, but position misalignment detection becomes difficult during charging
Solution Approach 1:
The patent introduces an intermediary detection mechanism that measures frequency components of transmitted power as an indirect indicator of position misalignment. Instead of directly detecting position, the system uses frequency analysis of the power transmission signal to infer alignment status, solving the detection difficulty while maintaining contactless operation
Solution Approach 2:
The patent replaces direct mechanical or electrical contact-based position detection with a non-contact frequency analysis method. By substituting traditional detection mechanisms with electromagnetic field-based frequency measurement, the system maintains contactless power transmission while enabling position misalignment detection through spectral analysis
2Stability of the object's composition
If constant voltage and current levels are maintained during charging, then stable power supply is achieved, but position misalignment cannot be identified
Solution Approach 1:
The patent applies periodic action by analyzing frequency components of the transmitted power signal. Instead of relying on static voltage and current measurements, the system uses periodic frequency analysis to detect changes in power transmission characteristics that indicate position misalignment, maintaining stable power supply while enabling detection
Solution Approach 2:
The patent monitors changes in frequency parameters of the transmitted power signal to detect position misalignment. By tracking frequency component variations rather than relying solely on constant voltage and current levels, the system maintains power supply stability while gaining the ability to identify misalignment through parameter changes
3Productivity
If position misalignment is not detected, then charging continues without interruption, but charging efficiency is reduced
Solution Approach 1:
The patent implements a feedback mechanism where frequency analysis results are used to detect position misalignment and provide information for adjusting receiver position. This feedback loop enables the system to maintain high charging efficiency by identifying and correcting misalignment issues while allowing charging to continue rather than interrupting it
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
Effectively detects position misalignment and improves charging efficiency by monitoring frequency components of transmitted power, allowing for real-time adjustments to optimize power transfer.
Implementation Method 1
an electric current induced by a receiving coil in a receiver to which an electric power is transmitted from a transmitter with a non-contact power supply transmitter method
Data Source
AI summary
The position misalignment detection device includes: a comparator configured to compare an electric current induced by a receiving coil in a receiver (RX) to which an electric power is transmitted from a transmitter (TX) with a non-contact power supply transmitter method; a frequency counter connected to the comparator, the frequency counter configured to count transmit frequency fi transmitted from the transmitter; and a register configured to store a counted value Fi counted by the frequency counter. There is provided the position misalignment detection device which can detect a position misalignment of the receiver on the transmitter during electric charging.