Analysis on the Power and Efficiency in Wireless Power Transfer System via Coupled Magnetic Resonances

作者：Liu Mingjie^*

来源：2nd International Conference on Materials Science, Energy Technology, Power Engineering (MEP), 2018-04-14 To 2018-04-15.

DOI：10.1063/1.5041165

The analysis of characteristics of the power and efficiency in wireless power transmission (WPT) system is the theoretical basis of magnetic coupling resonant wireless power transmission (MCR-WPT) technology. The electromagnetic field theory was employed to study the variation of the coupling degree of the two electromagnetic coils with the parameters of the coils. The equivalent circuit was used to analyze the influence of different factors on the transmission power and efficiency of the WPT system. The results show that there is an optimal radius ratio between the two coils, which makes the mutual inductance of the coils the largest. Moreover, when the WPT system operates in the under-coupling state, the transmission power of the system drops sharply, and there is a frequency splitting of the power when in the over-coupling state.

• 出版日期2018
• 单位华北电力大学（保定）; 华北电力大学