Single-Line Drive-Sense Circuit for Wireless Power Coupling Control
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Solution Overview
Problem
Current wireless power transfer systems face challenges in efficiently transferring power and communicating data simultaneously, particularly in environments where multiple devices with varying electrical characteristics are present, leading to interference and reduced efficiency.
Innovation Solution
The implementation of a drive-sense circuit that can simultaneously drive and sense signals via a single line, using a resonating capacitor to facilitate electromagnetic coupling between coils, allowing for the detection of electrical characteristics and adaptation of the reference signal to optimize power transfer and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless power transfer systems use multiple devices with varying electrical characteristics, then power transfer capability is improved, but interference between devices increases and efficiency decreases
Solution Approach 1:
The system continuously monitors the electrical characteristics of receiving devices and adjusts the reference signal parameters in real-time based on detected variations. This feedback mechanism allows the system to adapt to multiple devices with different electrical characteristics while maintaining optimal power transfer and minimizing interference through dynamic parameter adjustment.
Solution Approach 2:
The system changes the parameters of the reference signal (such as frequency, amplitude, or phase) based on the detected electrical characteristics of receiving devices. By dynamically adjusting these parameters, the system can optimize power transfer for each device while reducing electromagnetic interference between multiple devices operating simultaneously.
2Adaptability or versatility
If wireless power transfer systems transfer power and communicate data simultaneously, then system functionality is improved, but interference and reduced efficiency occur
Solution Approach 1:
The system combines power transfer and data communication functions into a single integrated wireless transmission channel. By modulating data information onto the power transfer signal, the system achieves simultaneous power delivery and communication without requiring separate transmission paths, thereby maintaining high overall efficiency while providing dual functionality.
Solution Approach 2:
The wireless power transfer system is designed to perform multiple functions simultaneously - both power transfer and data communication - through a single transmission system. The reference signal serves dual purposes: delivering power to receiving devices and carrying communication data, making the system universally applicable for both energy and information transfer needs.
3Loss of energy
If drive-sense circuit adapts reference signal based on detected electrical characteristics, then coupling efficiency is improved, but system complexity increases
Solution Approach 1:
The drive-sense circuit automatically detects the electrical characteristics of receiving devices and self-adjusts the reference signal parameters without requiring external intervention or complex control systems. This self-service capability improves coupling efficiency through adaptive tuning while minimizing the added system complexity by using autonomous detection and adjustment mechanisms.
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 enables efficient wireless power transfer and data communication by adapting the reference signal based on detected electrical characteristics, improving coupling efficiency and reducing interference between devices.
Implementation Method 1
using a resonating capacitor to facilitate electromagnetic coupling between coils
Implementation Method 2
using a resonating capacitor to facilitate electromagnetic coupling between coils
Implementation Method 3
using a resonating capacitor to facilitate electromagnetic coupling between coils
Data Source
AI summary
A device operative to transfer power and communicate wirelessly includes a drive-sense circuit (DSC), memory that stores operational instructions, and processing module(s). The DSC generates a drive signal based on a reference signal and provides the drive signal to a first coil via a single line and via a resonating capacitor, and simultaneously senses the drive signal via the single line, to facilitate electromagnetic coupling to a second coil to transfer power wirelessly to another device. The DSC also detects electrical characteristic(s) of the drive signal including whether a communication signal is transmitted from another device and generates a digital signal representative thereof. The processing module(s) generates the reference signal, processes the digital signal including to determine whether the communication signal is transmitted from the other device to the device and appropriately processes the digital signal to interpret control information of the communication signal to adapt the reference signal.