无接触电能传输系统的高效E类射频功放设计  

High efficiency class-E RF power amplifier for wireless power transfer system

作　　者：储江龙[1] 李玉玲[1] 杨仕友[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电工电能新技术》2014年第4期1-5,10,共6页Advanced Technology of Electrical Engineering and Energy

基　　金：浙江省重大科技专项(2011C11061)

摘　　要：功率放大器作为无接触电能传输系统的功率输入源,是该传输系统的关键构成部件。为了提高整个无接触电能传输系统的效率,适应不同传能线圈结构,以及保证线圈距离变化下稳定的运行,本文设计了一款高效的E类功率放大器。设计中采用矩量法(MOM)来获取功率放大器版图的S参数,对功放进行电磁分析,同时,考虑了设计中的电磁兼容问题并制作了一款屏蔽盒。论文给出了E类功率放大器的设计步骤和ADS软件仿真结果,并进行了实物制作。实测结果显示,设计的功率放大器能够输出的最大功率附加效率为93%,同时输出功率增益和功率分别达19.9dB和43.9dBm。考虑不同谐振频率的线圈结构时,能够获得19dB的功率增益和89%以上的功率附加效率;对于不同内阻和不同线圈距离的线圈结构,测试结果也有60%以上的功率附加效率。实验结果证实了设计的正确性和可行性。Power amplifier as the power source of wireless power transfer system is a critical part in this system, al- so called witricity. To improve the efficiency of the whole system and adapt to different coil structure, a high effi- ciency class-E power amplifier is developed. To determine the S-parameters in modelling board layout for electro- magnetic analysis, the method of moments （ MOM ） is employed. Also the electromagnetic compatibility issues in designing are carefully considered. This paper provides the design steps and simulation results. The practical am- plifier can provides a peak Power-Added-Efficiency of 93% with a power gain of 19.9 dB at. an output power of 43.9 dBm. A power gain of 19 dB and PAE of 89% can be achieved for different coil structure. A PAE more than 60% can be got for different internal resistance or coil distance coil structure. Those experimental results confirm positively the feasibility of the proposed work.

关 键 词：无线电能传输 E类功率放大器 

分 类 号：TN722.1[电子电信—电路与系统]