无线能量传输负载自适应的频率分叉边界控制

Load Adaptive Control Based on Frequency Bifurcation Boundary for Wireless Power Transfer System

无线能量传输技术是一种新型的电能传输方式,是指相对于传统的利用导线连接的电能传输方式而言,电能从电源到负载的一种没有直接电气接触的能量传输方式,解决了传统导线直接供电的缺陷,是一种安全有效的电能传输方法。目前无线能量传输通常使用补偿电容的工作方式使系统在发射端(原边)与接收端(副边)同时工作于谐振状态,以提高输出能力。前期实验发现,无线能量传输系统的效率受等效负载的影响,选取合适的等效负载可以改善系统的效率。基于此,研究了负载对于系统效率和频率分叉的影响,设计了一个负载自适应控制策略,能够提高系统的能量传输效率,并且保证不出现频率分叉现象。该研究将对无线能量传输系统的可靠设计具有重要指导意义。

Different from traditional conductive power transfer, wireless power transfer technology is a safe and effective power transfer type and there is no direct electrical contact between power supply and load. Researchers have proposed a resonant compensation method to improve output power, but it leads to frequency bifurcation. Load has a great influence on system efficiency and system efficiency can be improved by selecting an appropriate equivalent load. This paper focuses on the effect of load on system efficiency and frequency bifurcation, proposes a load adaptive control strategy, which could improve system efficiency and avoid frequency bifurcation phenomenon.