The Magnetic Coupled Wireless Power Transfer Driver Based on Adjustable Gain Constant-Current Compensation Network
Jing Yanyan, Qu Xiaohui, Han Hongdou, Wong SiuChung, Tse ChiKong
1. School of Electrical Engineering Southeast University Nanjing 210096 China;
2. Department of Electronic and Information Engineering Hong Kong Polytechnic University Hong Kong SAR 999077 China
Due to the large leakage inductance of the loosely coupled transformer, compensation technology is crucial to improve the transfer efficiency in the magnetic coupled wireless power transfer (WPT) system. In the light-emitting diode (LED) lighting application, the WPT LED driver should provide not only the required LED current directly, but also zero reactive power, low device stress and soft switching. Compared with the conventional compensation network whose output current gain relies on the transformer parameters significantly, as well as the loosely coupled transformer with the constrained design,a family of novel constant-current compensation network using two-port network theory was proposed in this paper,where high freedom of current gain and transformer design were achieved by adjusting the compensation parameters. The prototypes with the same circuit topology and transformer were built to realize the output current of 0.5A, 1A, 1.5A, respectively, which agreed well with the theoretical analysis. Characteristics of these compensation networks were also analyzed in detail.
景妍妍, 曲小慧, 韩洪豆,Wong SiuChung,Tse ChiKong. 基于可调增益恒流源补偿网络的磁场耦合无线电能传输LED驱动电路[J]. 电工技术学报, 2016, 31(增刊): 1-8.
Jing Yanyan1, Qu Xiaohui1, Han Hongdou1, Wong SiuChung2, Tse ChiKong2. The Magnetic Coupled Wireless Power Transfer Driver Based on Adjustable Gain Constant-Current Compensation Network. Transactions of China Electrotechnical Society, 2016, 31(增刊): 1-8.
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