基于背包策略的WPT系统多拾取输出控制方法

无线电能传输（WPT）是一种借助于高频电磁场实现电能以无线形式传输的新兴技术。在多拾取无线电能传输系统中，由于各个拾取系统的输出能力不均衡，导致系统综合协调控制相对困难。针对无线电能传输系统多拾取系统的输出稳压控制，该文提出了一种基于背包优化算法的输出稳压控制方法。分析了多拾取电路的工作原理，建立系统的输出交流阻抗模型，推导出输出电压与多拾取端稳压控制器占空比关系，提出了一种基于背包优化算法进行输出电压稳压控制的策略。实验结果表明，通过该优化控制算法，能实现多拾取WPT系统现输出电压的快速调节与稳压控制。

Output Optimization Control Strategy for Wireless Power Transfer System with Multiple Pickups Using Knapsack Algorithm

Wireless power transfer (WPT) technology realizes wireless power transfer with aid of high frequency magnetic field. In the multiple pickup WPT system, it is relatively difficult to realize output synthesis control due to unbalance output power capacity for each pickup. Aiming at the stabilizing output voltage for WPT system, this paper proposes a novel output control method for multi-pickup system by using knapsack optimization algorithm. The fundamental principle of multi-pickup system is first analyzed and the relationship between the output voltage and duty ratio of controller is derived. And then, the output voltage control strategy is proposed by using knapsack optimization algorithm. Experimental results verify that this control method can realize fast regulation and stabilize output control for multiple pickup WPT system.