middle range wireless power transfer systems with multiple resonators
来源期刊：中南大学学报(英文版)2015年第6期
论文作者：CHEN Xin ZHANG Gui-xiang
文章页码：2127 - 2136
Key words：wireless power transfer; middle range; multiple resonators; S-parameters; two-port network; impedance matching
Abstract: The equivalent two-port network model of a middle range wireless power transfer (WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, resistance, parasitic capacitance, mutual inductance and S-parameters of coils & resonators were analyzed. The impedance matching method was used to optimize load power and transmission efficiency of the multi-resonator WPT system, and the impedance matching method was realized through adjusting the distances between the coils and resonators. Experiments show that the impedance matching method can effectively improve load power and transmission efficiency for middle range wireless power transfer systems with multiple resonators, at distances up to 3 times the coil radius with efficiency more than 70% and load power also close to 3.5 W.
CHEN Xin(陈新)1, 2, ZHANG Gui-xiang(张桂香)1
(1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body
(Hunan University), Changsha 410082, China;
2. Department of Energy and Electrical Engineering, Hunan University of Humanities,
Science and Technology, Loudi 417000, China)
Abstract:The equivalent two-port network model of a middle range wireless power transfer (WPT) system was presented based on strongly coupled multiple resonators. The key parameters of the WPT system include self-inductance, resistance, parasitic capacitance, mutual inductance and S-parameters of coils & resonators were analyzed. The impedance matching method was used to optimize load power and transmission efficiency of the multi-resonator WPT system, and the impedance matching method was realized through adjusting the distances between the coils and resonators. Experiments show that the impedance matching method can effectively improve load power and transmission efficiency for middle range wireless power transfer systems with multiple resonators, at distances up to 3 times the coil radius with efficiency more than 70% and load power also close to 3.5 W.
Key words:wireless power transfer; middle range; multiple resonators; S-parameters; two-port network; impedance matching
