基于可控整流的磁耦合谐振式无线充电系统控制策略研究

Control Strategy for Magnetically Coupled Resonant Wireless Charging Systems Based on Controlled Rectification

摘要: 结合锂电池恒流恒压二阶段充电的逻辑，基于双边LCC型磁耦合谐振式无线电能传输具有的原副边恒流输出的特性，通过对整流桥进行控制，该系统不仅能实现恒流恒压输出的功能，同时对充电过程中的各种扰动也有良好的抵抗能力。首先分析双边LCC型补偿拓扑的电路特性以及可控整流控制原理，接着对电流环和电压环分别设计了模糊PI控制和线性自抗扰控制，最后采用Matlab/Simulink仿真验证，结果表明相比于传统的PI控制，所提控制方法不仅能实现恒流恒压二阶段充电功能，面对负载突变和互感变化时具有更好的动态性能。

Abstract: This work implements a two-stage Constant-Current (CC) and Constant-Voltage (CV) charging strategy for lithium batteries by exploiting the inherent primary and secondary side constant-current output characteristics of bilateral LCC-compensated Magnetically Coupled Resonant Wireless Power Transfer (MCR-WPT) systems. Through active control of the rectifier stage, the system not only achieves the desired output profiles but also maintains robust performance against operational disturbances. The operational principles of the bilateral LCC topology and the controlled rectification scheme are first analyzed. Subsequently, a fuzzy-PI controller and a linear active disturbance rejection controller are designed for the current and voltage regulation loops, respectively. Validation via Matlab/Simulink simulations demonstrates that, compared to conventional PI control, the proposed method successfully accomplishes the two-stage charging function while exhibiting superior dynamic response to both load transients and variations in coupling mutual inductance.