Adaptive Inductive Power Supply Device Identification
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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, and they struggle to distinguish between different devices and recognize fault conditions effectively.
Innovation Solution
An adaptive inductive power supply system that identifies remote devices through reflected impedance, controls operation based on device identity, and assesses fault conditions by using a controller and current sensor to apply power at various frequencies and retrieve operating parameters from a lookup table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional inductive systems use close and precise alignment between primary and secondary coils, then power transfer efficiency is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The system dynamically adjusts operating frequency based on detected load conditions and device identity. The controller varies the frequency of the primary coil to match the resonant frequency of the secondary coil, maintaining efficient power transfer even when alignment is not precise. This dynamic frequency adjustment compensates for misalignment effects.
Solution Approach 2:
The patent changes the operating parameter (frequency) to optimize power transfer. By sweeping through a range of frequencies and identifying the resonant frequency of the secondary circuit, the system achieves maximum efficiency without requiring precise physical alignment. The reflected impedance detection enables this parameter optimization.
2Loss of energy
If conventional inductive systems use coordinated tuning between power supply and remote device, then power transfer efficiency is improved, but adaptability to different devices deteriorates
Solution Approach 1:
The system uses reflected impedance detection as feedback to identify the resonant frequency of the secondary circuit. By monitoring the impedance reflected from the secondary coil back to the primary coil, the controller determines the optimal operating frequency for the connected device. This feedback mechanism enables automatic adaptation to different device types without manual tuning.
Solution Approach 2:
The patent creates a universal power supply system that can adapt to multiple different remote devices. The controller performs frequency sweeping and reflected impedance analysis to identify and optimize for any device with an LCR circuit, making the system compatible with various device types (cell phones, music players, PDAs) without requiring device-specific tuning configurations.
3Adaptability or versatility
If a single inductive power supply serves multiple device types, then adaptability is improved, but ability to distinguish between devices and recognize faults deteriorates
Solution Approach 1:
The controller performs periodic frequency sweeping to identify the resonant frequency of the connected device. By systematically varying the frequency and measuring reflected impedance at each step, the system characterizes the device's LCR circuit properties. This periodic identification process enables device distinction and fault detection while maintaining support for multiple device types.
Solution Approach 2:
The patent replaces physical identification methods with electrical characterization. Instead of mechanical or manual device identification, the system uses reflected impedance measurements and frequency response analysis to automatically identify device type and detect faults. This electrical substitution enables sophisticated device recognition and fault detection through non-intrusive electrical measurements.
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 a variety of devices and effective fault condition recognition, allowing for intelligent operation across a broad range of remote devices without the need for precise alignment or tuning, and supports both devices with inherent and modified resonant frequencies.
Implementation Method 1
Systems for providing wireless power using the principles of electromagnetic inductive have been available for many years
Implementation Method 2
each remote device or type of remote device includes one or more resonant frequencies that individually or collective provide a signature that is unique to that device or type of remote device
Implementation Method 3
an adaptive inductive power supply system and associated method in which an adaptive inductive power supply identifies the remote device through reflected impedance
Data Source
AI summary
An inductive power supply system to identify remote devices using unique identification frequencies. The system includes an AIPS and a tank circuit capable of inductively providing power to a remote device at different frequencies, and a sensor for sensing the reflected impedance of the remote device at tank circuit. The system further includes a plurality of different remote devices, each having a unique resonance frequency. In operation, the AIPS is capable of identifying the type of remote device present in the inductive field by applying power to a remote device at a plurality of unique identification frequencies until the remote device establishes resonance in response to one of the identification frequencies. The AIPS includes a controller that recognizes when resonance has been established by evaluating sensor data, which is representative of the reflected impedance of the remote device. Once the identity of a remote device is determined, the AIPS may pull operating parameters for the remove device from memory to ensure efficient operation and to assist in recognizing fault conditions.