ABSTRACT

In this work, implementation of constant current (CC) and constant voltage (CV) control of the LC/S compensated wireless charging converter (WCC) is presented. The LC/S compensation topology, operating as load independent in CC mode, is used in the proposed WCC. The CC charging control mode of the WCC is achieved at the constant operation frequency providing the maximum power transfer. On the other hand, frequency modulation (FM) control method is applied to achieve the CV charging control operation. Thus, implementation of entire charge period of WCC using LC/S compensation is provided with a minimum frequency variation. The basic principles and the analytical analysis of the proposed WCC are presented. The analytical output regulation, during CC and CV charging control modes, is discussed based on power transfer efficiency. Finally, a prototype with 60 W output power is built to validate the presented analytical analysis. The efficiency variations of CC and CV charging control modes are extracted as function of the load condition. The misalignment performance of the proposed system is also evaluated based on the load condition. The maximum efficiency of the proposed system is measured as 86.6% at 70 mm air gap and 40 W output power.

摘要

在这项工作中，介绍了 LC/S 补偿无线充电转换器 (WCC) 的恒流 (CC) 和恒压 (CV) 控制的实现。在 CC 模式下作为负载独立运行的 LC/S 补偿拓扑用于建议的 WCC。WCC 的 CC 充电控制模式是在提供最大功率传输的恒定工作频率下实现的。另一方面，应用频率调制（FM）控制方法来实现CV充电控制操作。因此，使用 LC/S 补偿实现 WCC 的整个充电周期具有最小的频率变化。提出了拟议WCC的基本原理和分析分析。基于功率传输效率讨论了 CC 和 CV 充电控制模式下的分析输出调节。最后，构建了一个具有 60 W 输出功率的原型来验证所提出的分析分析。提取 CC 和 CV 充电控制模式的效率变化作为负载条件的函数。还根据负载条件评估了所提出系统的失准性能。在 70 mm 气隙和 40 W 输出功率下，所提出系统的最大效率测量为 86.6%。