干扰磁共振耦合系统的通信和功率传输分析

IF 2.3 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE journal of radio frequency identification Pub Date : 2024-07-29 DOI:10.1109/JRFID.2024.3434642
Richard Fischbacher;Jose Romero Lopera;David Pommerenke;Ralph Prestros;Bernhard Auinger;Wolfgang Bösch;Jasmin Grosinger
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引用次数: 0

摘要

这项研究首次提出了对相互干扰的无线功率传输(WPT)和近场通信(NFC)系统的通信和功率传输分析。通信分析是通过研究受到 WPT 干扰时 NFC 标签与阅读器在数字基带中的通信质量进行的。功率传输分析是通过研究受 NFC 原型系统无源负载效应影响时的最大传输功率和 WPT 效率来进行的。应用电感去耦技术提高了通信质量和 WPT 性能。通过至少 60~\%$ 的电感去耦实现了良好的通信质量。通信信号解调的系统级调整进一步提高了通信质量,只需要 15~%$ 的电感去耦。电感去耦改善了 WPT 性能,最大功率传输高达 27 美元,WPT 效率从 0.42 提高到 0.67。此外,电感去耦减少了 WPT 系统因能量传输过多而损坏 NFC 系统的几率。这些研究采用了时间效率较高的宽带电路级模拟和经过测量验证的宽带等效电路线圈模型。
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Communication and Power Transfer Analysis of Interfering Magnetically Resonant Coupled Systems
This work presents, for the first time, a communication and power transfer analysis of interfering wireless power transfer (WPT) and near-field communication (NFC) systems. The communication analysis is conducted by investigating the NFC tag-to-reader communication quality in the digital baseband while being interfered with by WPT. The power transfer analysis is conducted by investigating the maximum power transferred and WPT efficiency $\eta $ while being affected by the passive loading effects of the NFC prototype system. Inductive decoupling techniques are applied to improve the communication quality and WPT performance. Good communication quality was achieved with at least $60~\%$ inductive decoupling. A system-level adjustment of the communication signal demodulation achieved further communication quality improvements, requiring only $15~\%$ inductive decoupling. The WPT performance was improved by inductive decoupling, shown by an improved maximum power transfer of up to $27~\%$ and an improved WPT efficiency $\eta $ from 0.42 to 0.67. Additionally, inductive decoupling reduced the chance of the WPT system damaging the NFC system due to too much energy being delivered. These investigations were conducted using time-efficient broadband circuit-level simulations and measurement-verified broadband equivalent circuit coil models.
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