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Enhancement of robustness to frequency detuning with wireless power transfer based on Van der Pol resonance
International Journal of Circuit Theory and Applications ( IF 2.3 ) Pub Date : 2022-08-12 , DOI: 10.1002/cta.3406
Meng Wang 1, 2 , Guangcheng Song 1, 2 , Yanyan Shi 1, 2 , Renliang Yin 1, 2
Affiliation  

In near-field energy transmission, wireless power transfer based on magnetic coupling resonance is preferred. For efficient power transfer, the quality factor of magnetic coupling resonance wireless power transfer (MCR-WPT) system should be kept at a high value, which makes the system sensitive to frequency detuning. Different from conventional approaches dealing with the problem in linear MCR-WPT system, this paper proposes a novel MCR-WPT system, which is based on Van der Pol nonlinear resonant circuit to address the problem of frequency detuning. A nonlinear resistor is introduced, and the nonlinear Van der Pol MCR-WPT system is established. Based on the mathematical model and the theoretical analysis, it is found that the frequency band is broadened. To validate the performance of the proposed system, extensive simulation and experimental work are conducted. Unlike the traditional linear system, which only peaks at the resonant frequency, the results show that the output of the proposed system is still high within a certain frequency band when the operating frequency deviates from the original resonant frequency. The impact of frequency detuning caused by variation of capacitance is also studied. It can be concluded that the proposed MCR-WPT system is effective in coping with the frequency detuning.

中文翻译:

基于范德波尔共振的无线电力传输增强对频率失谐的鲁棒性

在近场能量传输中,首选基于磁耦合谐振的无线电力传输。为了实现高效的电力传输,磁耦合谐振无线电力传输 (MCR-WPT) 系统的品质因数应保持在较高值,这使得系统对频率失谐敏感。与处理线性 MCR-WPT 系统问题的传统方法不同,本文提出了一种新颖的 MCR-WPT 系统,该系统基于 Van der Pol 非线性谐振电路来解决频率失谐问题。引入非线性电阻,建立了非线性Van der Pol MCR-WPT系统。基于数学模型和理论分析,发现频带被展宽。为了验证所提出系统的性能,进行了广泛的模拟和实验工作。与仅在谐振频率处达到峰值的传统线性系统不同,结果表明,当工作频率偏离原始谐振频率时,所提出系统的输出在一定频带内仍然很高。还研究了电容变化引起的频率失谐的影响。可以得出结论,所提出的 MCR-WPT 系统在应对频率失谐方面是有效的。还研究了电容变化引起的频率失谐的影响。可以得出结论,所提出的 MCR-WPT 系统在应对频率失谐方面是有效的。还研究了电容变化引起的频率失谐的影响。可以得出结论,所提出的 MCR-WPT 系统在应对频率失谐方面是有效的。
更新日期:2022-08-12
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