Dynamic Load Configuration for Inductive Link Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In inductive power supply systems, power losses during communication are significant due to varying power demands and inefficient resistor selection, which is exacerbated by dynamic load changes and spatial movement variations.
Innovation Solution
An inductive power supply system with a remote device that dynamically toggles between multiple load configurations based on detected power levels, using a sensor and controller to configure the dynamic load configuration, minimizing power losses by optimizing impedance and load shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed communication resistor is selected during manufacture to account for worst case scenarios, then reliability is improved, but power losses during communication increase
Solution Approach 1:
The patent applies dynamics by replacing the fixed communication resistor with a dynamically adjustable load configuration system. The controller adjusts the load configuration based on real-time power delivery conditions detected by the sensor, allowing the system to adapt between worst-case and optimal conditions. This resolves the contradiction by making the communication load dynamic rather than static, enabling reliability during worst-case scenarios while minimizing power loss during normal operation.
2Reliability
If the communication resistor is increased to ensure sufficient load shift for communication, then communication reliability is improved, but power losses are amplified
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the load configuration parameters based on power delivery conditions. Instead of using a consistently high resistance value to ensure sufficient load shift, the system adjusts the load configuration parameter (effective resistance) to match the actual power delivery level. This allows sufficient load shift for reliable communication when needed, while minimizing power loss when high power delivery is not required.
3Loss of energy
If the load configuration is optimized for minimum power loss, then power efficiency is improved, but communication reliability may deteriorate under varying power conditions
Solution Approach 1:
The patent applies feedback by implementing a closed-loop control system where the sensor continuously monitors power delivery conditions and provides feedback to the controller. The controller uses this feedback to adjust the load configuration in real-time, ensuring that the system maintains optimal balance between power efficiency and communication reliability under varying power conditions. This resolves the contradiction by making the system adaptive rather than statically optimized.
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 results in significant power savings by dynamically adjusting load configurations to match power requirements, reducing power losses during communication while maintaining reliable data transfer.
Implementation Method 1
communication is accomplished by repeatedly shunting a coil in the RFID tag through a transistor, the shunting causes slight fluctuations in the RFID reader's carrier amplitude. As the secondary winding is momentarily shunted, the primary winding experiences a momentary voltage drop.
Implementation Method 2
A sensor in the remote device detects the amount of power that the inductive power supply delivers or that the remote device draws.
Data Source
AI summary
The present invention provides a load used for communication in a remote device having a dynamic communication load configuration. In one embodiment, the dynamic communication load configuration vanes as a function of a characteristic of power in the remote device. The remote device toggles between load configurations to communicate with the inductive power supply. A sensor in the remote device detects a characteristic of power in the remote device and configures the communication load based on the sensor output. In another embodiment, the remote device adjusts the dynamic communication load configuration in the remote device in response to a failure to receive a response from the inductive power supply.