Analysis of the Influence of Compensation Capacitance Errors of a Wireless Power Transfer System with SS Topology

作者：Wang, Yi^*; Lin, Fei; Yang, Zhongping; Liu, Zhiyuan

来源：Energies, 2017, 10(12): 2177.

DOI：10.3390/en10122177

• wireless power transfer (WPT) system
• series-series (SS) topology
• compensation errors

In this study, in order to determine the reasonable accuracy of the compensation capacitances satisfying the requirements on the output characteristics for a wireless power transfer (WPT) system, taking the series-series (SS) compensation structure as an example, the calculation formulas of the output characteristics, such as the power factor, output power, coil transfer efficiency, and capacitors' voltage stress, are given under the condition of incomplete compensation according to circuit theory. The influence of compensation capacitance errors on the output characteristics of the system is then analyzed. The Taylor expansions of the theoretical formulas are carried out to simplify the formulas. The influence degrees of compensation capacitance errors on the output characteristics are calculated according to the simplified formulas. The reasonable error ranges of the compensation capacitances are then determined according to the requirements of the output characteristics of the system in the system design. Finally, the validity of the theoretical analysis and the simplified processing is verified through experiments. The proposed method has a certain guiding role for practical engineering design, especially in mass production.

• 出版日期2017-12
• 单位北京交通大学