Abstract

This article investigates the tracking control of the wireless power transfer (WPT) system with disturbances and constraints. Using the generalized state-space averaging method, a small signal perturbation model of the system is obtained. To estimate the perturbation faster and more accurately, the fixed-time disturbance observer is introduced. Then a fixed-time disturbance observer-based controller (DOBC) is designed. In addition, to ensure the WPT current constraint not be violated, tan type Barrier Lyapunov Functions (BLFs) are added. To illustrate the robustness of the WPT system, a 100-watt WPT system is built and the closed system is proved to be effective. Experimental results show that the startup response time of the current is 4 ms without overshoot. Under loads and resonance capacitors changes, the WPT current can also converge to the reference value within 4 ms.

摘要

本文研究了具有干扰和约束的无线电力传输 (WPT) 系统的跟踪控制。利用广义状态空间平均法，得到了系统的小信号扰动模型。为了更快更准确地估计扰动，引入了固定时间扰动观测器。然后设计了基于固定时间干扰观测器的控制器（DOBC）。此外，为了确保不违反 WPT 电流约束，添加了 tan 型势垒李雅普诺夫函数 (BLF)。为了说明 WPT 系统的鲁棒性，我们搭建了一个 100 瓦的 WPT 系统，并证明封闭系统是有效的。实验结果表明，电流启动响应时间为4 ms，无过冲。在负载和谐振电容变化的情况下，