Resonant enhanced parallel-T topology for weak coupling wireless power transfer pickup applications

The Journal of Engineering

Chunbo Zhu¹  Yao Guo¹  Kai Song¹  Guo Wei²  Rengui Lu² 

[1] Department of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, People's Republic of China

关键词: coil inductance;    weak coupling wireless power transfer pickup application;    Q value;    frequency stability;    resonant frequency;    resonant enhancement effect;    T-matching network;    parallel-T resonant topology enhancemnet;    WPT;   

DOI  :  10.1049/joe.2014.0343

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

For the wireless power transfer (WPT) system, the transfer performance and the coupling coefficient are contradictory. In this paper, a novel parallel-T resonant topology consists of a traditional parallel circuit and a T-matching network for secondary side is proposed. With this method, a boosted voltage can be output to the load, since this topology has a resonant enhancement effect, and high Q value can be obtained at a low resonant frequency and low coil inductance. This feature makes it more suitable for weak coupling WPT applications. Besides, the proposed topology shows good frequency stability and adaptability to variations of load. Experimental results show that the output voltage gain improves by 757% compared with traditional series circuit, and reaches 85% total efficiency when the coupling coefficient is 0.046.

【 授权许可】

CC BY