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，其目的是完全消除电力设备的电缆。无线电源系统通常限于50厘米以内的短距离，该技术的应用范围很广，从消除汽车和航空航天应用中的线束到为植入的生物医学设备供电。无线电力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实现高效、鲁棒功率传输的必要条件。在本研究计划中，将研究E类逆变器和E类同步整流器的无线链路。将实现三个不同频段（13.56 MHz， 27.12 MHz和40.68 MHz）的设计。电容耦合无线链路的功率传输比较将在10到40厘米的空间变化范围内进行评估。本文将对E类电路拓扑在空间阻抗变化时的鲁棒性以及链路频率对空间阻抗灵敏度的影响作出结论。

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.