Lu Tan, Ding Libo, Dai Keren, Ma Shaojie, Zhang He
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Sensors (Basel). 2025 Apr 14;25(8):2459. doi: 10.3390/s25082459.
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.
为了解决在宽温度范围内运行的无线电力与信息传输系统中能量和信息传输的稳定性问题，本文建立了变温条件下电磁耦合系统谐振频率的数学模型。进行了仿真和实验以分析温度对谐振特性的影响。结果表明，在-40℃至50℃的温度范围内，频率偏差导致功率偏差系数降低至35.93%。为缓解此问题，提出了一种基于直接数字合成（DDS）的实时频率补偿方法，该方法动态调整工作频率以确保系统保持在最佳谐振状态。实验结果表明，所提方法将系统的工作频率误差从3kHz降低到0.2kHz以内（降低了93.33%），使功率偏差系数恢复到0.54%，并显著提高了系统的稳定性和可靠性。本研究为宽温度条件下电磁耦合无线电力与信息传输系统的优化提供了理论支持和工程见解。
