Double-Sided LCL Compensation Alteration Based on MCR-WPT Charging System
Liu Guojin1,2, Bai Jiahang1, Cui Yulong3, Li Zhigang1, Yue Chenghao1
1. State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin 300130 China; 2. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province Hebei University of Technology Tianjin 300130 China; 3. College of Information Science & Technology Beijing University of Chemical Technology Beijing 100029 China;
Abstract：In order to simplify the circuit design and control complexity, a magnetically-coupled resonant wireless power transfer (MCR-WPT) charging system was proposed based on double-sided LCL compensation alteration. Through adjusting compensation network, constant voltage (CV) and constant current (CC) charging modes can be achieved. First, mathematical model was obtained by modeling primary and secondary sides of double-sided LCL using two-port network method. The parameter configuration condition for CV or CC output was analyzed. According to the characteristics of CV and CC parameter configuration, the circuit structure of compensation alteration was designed. In the light of the relationship between the key parameters and the system transmission characteristics, the reasonable parameter configuration was determined. The designed MCR-WPT charging system has the characteristics of no complicated circuit, simple control, constant primary current and constant frequency. Finally, an experimental platform was built. The experimental results show that the output voltage and current fluctuation of the system are small. The proposed scheme can meet the requirements of CV and CC wireless charging.
刘帼巾, 白佳航, 崔玉龙, 李志刚, 岳承浩. 基于双LCL变补偿参数的磁耦合谐振式无线充电系统研究[J]. 电工技术学报, 2019, 34(8): 1569-1579.
Liu Guojin, Bai Jiahang, Cui Yulong, Li Zhigang, Yue Chenghao. Double-Sided LCL Compensation Alteration Based on MCR-WPT Charging System. Transactions of China Electrotechnical Society, 2019, 34(8): 1569-1579.
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2019, Vol. 34 
