Wireless power transfer study using class E inverters and synchronous rectifiers

无线电力传输系统是一项新兴技术，旨在彻底消除为电气设备供电的电缆。无线电力系统通常被限制在50厘米的短距离内，该技术的应用范围很广，从汽车和航空航天应用中的线束消除，到为植入的生物医疗设备供电。无线电源系统的主要挑战之一是补偿由空间变化引起的阻抗变化。空间阻抗变化的补偿是获得高效和稳健的功率传输的关键。在本研究项目中，将研究与E类逆变器和E类同步整流器的无线连接。将实施三个不同频段(13.56兆赫、27.12兆赫和40.68兆赫)的设计。通过比较电容耦合无线链路上的功率传输，将评估空间变化范围从10到40厘米。得出了E类电路拓扑结构在空间阻抗变化时的稳健性以及链路频率对空间阻抗灵敏度的影响的结论。

Wireless power transfer systems are an emerging technology with the aim of completely eliminating cables forpowering electrical devices. Wireless power systems are typically limited to short distances up to 50 cm, andapplications of the technology are broad ranging from the elimination of wiring harnesses in automobile andaerospace applications to powering implanted biomedical devices. One of the main challenges in wirelesspower systems is compensating for impedance changes created by spatial variation. The compensation ofspatial impedance change is essential to obtain efficient and robust power transfer.In this research project, wireless links with class E inverters and class E synchronous rectifiers will beinvestigated. Designs for three different frequency bands (13.56 MHz, 27.12 MHz and 40.68 MHz) will beimplemented. A comparison of the power transfer over a capacitively coupled wireless link will be evaluatedfor a range of spatial variation from 10 to 40 cm. Conclusions will be made regarding the robustness of theclass E circuit topology when subjected to spatial impedance changes as well as the impact of link frequency onspatial impedance sensitivity.