感应耦合电能传输系统动态负载恒压输出研究

摘要

针对感应耦合电能传输( inductively coupled power transfer,ICPT)系统负载变化时系统输出的稳恒性问题,本文首先分别对电压型与电流型ICPT系统地负载适应能力进行分析,得出电压型ICPT 系统比电流型ICPT 系统具有更好地负载适应能力和频率稳定性地结论。同时提出了一种新型的功率补给及自循环模式地输出控制方法,该方法从系统能量平衡地关系出发,通过对功率补给模式工作时间与自循环模式工作时间比值地控制实现系统输出恒压。该控制方法从能量角度实现控制,有效地避免了该非线性系统地复杂建模及控制设计过程。利用Matlab/Simulink搭建系统模型,仿真验证了该方法地有效性。%Aiming at the problem of the system output steady persistence with the ICPT ( inductively coupled power transfer) system load changing, the load adaptability of the voltage mode and the current mode in ICPT system has been analyzed separately and the conclusion has been obtained that the voltage mode will perform better than the cur-rent mode in load adaptability and frequency stability. Meanwhile, a new power supply and self-circulation method has been proposed, which realize the value of the system output is constant taking view of the system power balance by the control of the ratio of the power supply working time and the self-circulation working time. This method will realize the control of the system from the perspective of the energy, as well as avoid the complex system modeling of the non-linear system and the process of the control design. The system mode is built by Matlab/Simulink, and simulation re-sults verify the effectiveness of the proposed method.