非接触电能传输系统恒流充电控制方法研究

针对非接触电能传输(CPT)系统的输出充电电流控制, 提出一种基于H∞控制的原边主动控制方法. 借助于微分动力学模型的频域展开, 实现了系统广义状态空间平均模型, 构建了系统性能加权函数及控制系统结构, 建立了控制器及观测器的Ricatti方程, 并通过Hermitian矩阵完成了该方程的求解, 利用迭代计算方法以获得最优H∞控制器. 该方法可动态调节不同负载条件下原边注入能量, 有效提高轻载下系统整体效率. 实验结果验证了该方法的有效性.

Study on Constant Charging Current Charging Control of Contaceless Power Ttransfer Systems

Aimed at the charging control of contactless power transfer (CPT) systems, the paper proposes a primary side control method based on H∞ control. With the conversion of differential dynamic model in frequency domain, the generalized state space averaging model is set up. The control system structure and performance weighted function are proposed. The Ricatti equations for controller and observer are put forward and solved with Hermitian matrix as well. Furthermore, an iterative computing method is designed to acquire optimal H∞ controller. The control method can regulate the energy injection according to different load condition and improves the system efficiency especially for light load condition. The experimental results verify this method.