Inductive Power Supply Device Identification via Resonant Frequencies
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Solution Overview
Problem
Conventional inductive power supply systems face limitations in efficiently powering a wide range of remote devices due to the need for precise alignment and coordinated tuning, which varies across different device models and types, and lack effective fault recognition across a broad range of devices.
Innovation Solution
An adaptive inductive power supply system that identifies remote devices through reflected impedance using unique resonant frequencies and operates accordingly, employing identification capacitors to provide predetermined resonant frequencies for device identification and fault condition assessment, allowing efficient power transfer and fault detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional inductive power supply systems use precise alignment and coordinated tuning between primary and secondary coils, then power transmission efficiency is improved, but device compatibility and ease of operation deteriorate due to the need for precise positioning and tuning
Solution Approach 1:
The system dynamically adjusts the operating frequency based on the detected resonant frequency of the remote device. The frequency controller continuously monitors and adapts the power transmission frequency to match the specific device being powered, eliminating the need for manual alignment and tuning while maintaining high efficiency across different devices
Solution Approach 2:
The system uses feedback from the remote device's resonant frequency detection to automatically adjust the primary coil's operating frequency. By monitoring the reflected impedance and identifying the peak resonant frequency, the system self-corrects to maintain optimal power transfer without requiring user intervention for positioning or tuning
2Adaptability or versatility
If conventional inductive power supply systems use fixed operating parameters, then device complexity is reduced, but adaptability to different remote devices deteriorates
Solution Approach 1:
The system performs self-identification and self-configuration by automatically detecting the resonant frequency of each remote device. The frequency controller and sensor system work together to identify the device type and adjust operating parameters without external intervention, enabling the system to adapt to different devices while maintaining relatively simple architecture
Solution Approach 2:
The system changes the operating frequency parameter dynamically based on the detected device characteristics. By adjusting the frequency to match each device's resonant frequency, the system achieves broad compatibility across different device types without requiring complex hardware modifications for each device category
3Reliability
If conventional inductive power supply systems lack device identification capability, then device complexity is reduced, but the ability to recognize fault conditions and optimize performance deteriorates
Solution Approach 1:
The system performs preliminary device identification by detecting the resonant frequency before initiating full power transmission. This preliminary action allows the system to identify the device type, retrieve appropriate operating parameters from the lookup table, and prepare for optimized power delivery, improving reliability while adding minimal complexity
Solution Approach 2:
The lookup table acts as an intermediary that maps detected resonant frequencies to specific device types and their optimal operating parameters. This intermediary structure allows the system to recognize fault conditions and optimize performance by translating simple frequency measurements into comprehensive device-specific control parameters
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
Enables efficient power delivery to various devices by uniquely identifying and adapting to their operating parameters, while effectively recognizing and addressing fault conditions, thus improving operational efficiency and convenience.
Implementation Method 1
Systems for providing wireless power using the principles of electromagnetic inductive have been available for many years
Implementation Method 2
each of which has a unique resonant frequency or unique pattern of resonant frequencies
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A remote device(14) for receiving wireless power from an inductive power supply (12) comprises a secondary coil (12) for receiving operating wireless power from the inductive power supply at an operating power transfer frequency, and one or more identification capacitors connected in parallel to the secondary coil that provide one or more predetermined resonant identification frequencies different from the operating power transfer frequency. The identification frequencies identify at least one of the remote device, a type of the remote device, a class of the remote device, and a manufacturer of the remote device, and identification frequencies allow the remote device to be identified.