摘要
针对无线电能传输系统磁耦合机构两侧偏移引起输出功率大幅度波动的问题,文中提出了一种基于失谐的补偿网络参数和结构的优化方法,以提高输出功率的抗偏移性。文章根据极值点的导数为零且函数取最大值的数学思想,使两侧线圈正对的额定工作点对应输出功率的极值点。在此基础上,分析发现了SS补偿拓扑的补偿参数与输出功率抗偏移性之间的规律;针对欠补偿的串联补偿方式,设计了PS/S的补偿结构,减少了无功功率的输入,可实现输入阻抗零相角或软开关;采用圆形线圈结构,搭建了传输距离为100 mm,额定输出功率为1000 W的实验样机,验证了所提出优化方法的有效性和补偿参数与抗偏移性之间规律的正确性。磁耦合机构发生横向偏移100 mm,对应互感从80.2μH减小为62.7μH。实验结果表明,使用所提优化方法,在一定的偏移范围内,有效地提高了输出功率的抗偏移性和整体运行性能。
In order to solve the problem that the output power fluctuates greatly due to the misalignment of the both sides of magnetic coupling mechanism in the wireless power transfer system,an optimization method of parameters and structure of compensation network based on detuning is proposed to improve the anti-misalignment performance of output power.Firstly,according to the mathematical idea that the derivative is zero and the function is the maximum value in the extreme point,the rated working point corresponds to the extreme point.On this basis,the law between the compensation parameters of SS compensation topology and the anti-misalignment of output power is analyzed and summarized.Secondly,for the series compensation mode of under compensation,the PS/S compensation structure is designed to reduce the input of reactive power and realize zero-phase angle of the input resistance or soft switching.Finally,an experimental prototype of a transmission distance of 100 mm with a circular coil structure and a rated output power of 1000 W is built to verify the effectiveness of the proposed optimization method and correctness of the law between detuning parameters and anti-misalignment performance.The corresponding mutual inductance decreased from 80.2μH to 62.7μH when the magnetic coupling mechanism has a horizontal misalignment of 100 mm.Experimental results show that the proposed optimization method can effectively improve the anti-misalignment performance of output power and the running performance of the system within a certain extent of misalignment range.
作者
秦伟
张文杰
吝伶艳
宋建成
田慕琴
乔玮
Qin Wei;Zhang Wenjie;Lin Lingyan;Song Jiancheng;Tian Muqin;Qiao Wei(Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《电测与仪表》
北大核心
2022年第3期32-37,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51977137,51577123)。
关键词
无线电能传输系统
磁耦合机构
补偿网络
失谐
抗偏移性
wireless power transfer system
magnetic coupling mechanism
compensation network
detuning
anti-misalignment performance
