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

TL;DR

This paper presents a method to improve the stability of wireless energy and information transfer systems by compensating for temperature-related frequency errors.

Contribution

A novel real-time frequency compensation method using DDS is proposed to stabilize wireless systems under varying temperatures.

Findings

Frequency deviation within −40 °C to 50 °C reduces the power deviation coefficient to 35.93%.

The proposed DDS-based compensation reduces frequency error from 3 kHz to 0.2 kHz, improving the power deviation coefficient to 0.54%.

Abstract

To address the stability issues of energy and information transmission in wireless power and information transfer system operating over a wide temperature range, this paper establishes a mathematical model of the resonant frequency of an electromagnetic coupling system under varying temperature conditions. Simulations and experiments are conducted to analyze the impact of temperature on resonance characteristics. The results show that within the temperature range of −40 °C to 50 °C, frequency deviation leads to a reduction in the power deviation coefficient to 35.93%. To mitigate this issue, a real-time frequency compensation method based on Direct Digital Synthesis (DDS) is proposed, which dynamically adjusts the operating frequency to ensure that the system remains in optimal resonance. The experimental results demonstrate that the proposed method reduces the system’s operating frequency error from 3 kHz to within 0.2 kHz (a 93.33% reduction), restoring the power deviation coefficient to 0.54% and significantly improving system stability and reliability. This study provides theoretical support and engineering insights for the optimization of electromagnetic coupling wireless power and the information transfer system under wide temperature conditions.

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