磁耦合谐振式无线电能传输的基本特性研究

磁耦合谐振式无线电能传输的基本特性讨论摘 要近些年，无线电能传输技术受到了越来越广泛的关注。作为一种新型的无线电能传输方式，磁耦合谐振式无线电能传输技术具有传输功率大、传输距离远、能量传输效率高、穿透性强，以及无方向性等特点。目前，磁耦合谐振式无线电能传输距离为几十厘米，传输效率可以达到90%，传输功率可以达到瓦级。通过对磁耦合谐振式无线电能传输的基本特性的深化讨论，可扩大传输范围、增强传输效率，具有重要的讨论价值和有用价值。本文首先利用耦合模理论分析了磁耦合谐振式无线传能的机理，然后建立等效模型，在理论上讨论了系统的频率特性并得到了频率分裂现象的规律，接着由频率特性进一步推导得到了系统的距离（包括轴向和径向距离）特性和方向特性。为了进一步验证理论分析的正确性，本文设计了磁耦合谐振式无线传能的实验系统，具体包括：信号源、功率放大器、发射与接收系统以及整流调压电路等。利用实验电路对本文所提理论进行实验验证，包括频率、距离、方向等特性实验，实验结果与理论分析具有较好的一致性，证明了设计方案的有效性。关键词：无线电能传输；磁耦合谐振；频率特性；距离特性；方向特性ABSTRACTIn recent years, more and more widely attention has been paid to wireless power transmission technology. As a new type of wireless power transmission technology, wireless power transfer technology via magnetic resonance coupling has the characteristics of a higher transfer power, a longer transfer distance and a very higher efficiency, and which can be nearly non-directional and be able to go through various non-metallic objects.At present, magnetic coupling resonant wireless power transmission distance can be from scores of centimeters to several meters, transmission efficiency can reach 90%, and transmission power can reach watt grade. Via the in-depth study on the basic characteristic of the magnetic coupled resonant wireless power transfer, we can expand the scope of transport, and enhance the transport efficiency, which has important research value and practical value. First...