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A High-Efficiency Wireless Information and Energy Co-Transmission System Based on Self-Compensating Inductive

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Summary

This study enhances wireless power and information transfer stability across wide temperatures. A Direct Digital Synthesis method minimizes frequency errors, significantly improving system reliability.

Keywords:
Direct Digital Synthesis (DDS)resonant frequencytemperature compensationwireless power and information transfer system

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Wireless Communication Systems

Background:

  • Wireless power and information transfer systems face stability challenges due to temperature fluctuations.
  • Resonant frequency shifts under varying temperatures degrade system performance.

Purpose of the Study:

  • To develop a mathematical model for resonant frequency in electromagnetic coupling systems under temperature variations.
  • To propose and validate a real-time frequency compensation method for enhanced system stability.

Main Methods:

  • Mathematical modeling of resonant frequency in electromagnetic coupling systems.
  • Simulations and experimental analysis of temperature impact on resonance.
  • Implementation of a Direct Digital Synthesis (DDS) based frequency compensation technique.

Main Results:

  • Temperature variations (-40 °C to 50 °C) caused frequency deviations, reducing the power deviation coefficient to 35.93%.
  • The DDS method reduced frequency error from 3 kHz to 0.2 kHz (93.33% improvement).
  • System stability and reliability were significantly enhanced, with the power deviation coefficient restored to 0.54%.

Conclusions:

  • The proposed DDS-based frequency compensation effectively mitigates temperature-induced instability in wireless power and information transfer systems.
  • This research offers crucial theoretical and engineering insights for optimizing such systems operating under wide temperature conditions.