Study on efficiency of different topologies of magnetic coupled resonant wireless charging system

2017 International Conference on New Energy and Future Energy System

Cui, S.^1 ; Liu, Z.Z.^1 ; Hou, Y.J.^2 ; Zeng, H.^1 ; Yue, Z.K.^1 ; Liang, L.H.^1

School of Electrical Engineering, Shandong University, Shandong Province Jinan

250061, China^1

Energy Research Institute, Shandong Academy of Sciences, Shandong Province Jinan

250061, China^2

关键词: Circuit components;    Coupling coefficient;    Different structure;    Efficiency characteristic;    Operating frequency;    Power characteristic;    Transmission efficiency;    Wireless charging system;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/93/1/012064/pdf
DOI  :  10.1088/1755-1315/93/1/012064

来源: IOP

【 摘 要 】

This paper analyses the relationship between the output power, the transmission efficiency and the frequency, load and coupling coefficient of the four kinds of magnetic coupled resonant wireless charging system topologies. Based on mutual inductance principle, four kinds of circuit models are established, and the expressions of output power and transmission efficiency of different structures are calculated. The difference between the two power characteristics and efficiency characteristics is compared by simulating the SS (series-series) and SP (series-parallel) type wireless charging systems. With the same parameters of circuit components, the SS structure is usually suitable for small load resistance. The SP structure can be applied to large load resistors, when the transmission efficiency of the system is required to keep high. If the operating frequency deviates from the system resonance frequency, the SS type system has higher transmission efficiency than the SP type system.