感应电能传输系统耦合机构输出功率的分析和控制  

Analysis and control of output power of coupling mechanism of inductive power transfer system

作　　者：姜龙斌 史黎明[1,2] 范满义 张发聪 殷正刚 JIANG Long-bin;SHI Li-ming;FAN Man-yi;ZHANG Fa-cong;YIN Zheng-gang(Key Laboratory of Power Electronics and Electric Drive,Chinese Academy of Sciences,Beijing 100190,China;Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院电力电子与电气驱动重点实验室,北京100190 [2]中国科学院电工研究所,北京100190 [3]中国科学院大学,北京100049

出　　处：《电工电能新技术》2020年第5期1-9,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：国家重点研发计划项目(2017YFB1201003-09);北京市自然科学基金项目(3184060)。

摘　　要：由于制造工艺等原因,感应电能传输系统(IPT)耦合机构的原边和副边线圈的自谐振频率可能不同,通常在耦合机构的副边采用可控整流器通过实施阻抗变换使耦合机构工作于高效率状态。但是当耦合机构工作于原边或副边线圈自谐振频率时,耦合机构保持高效率运行时的最大输出功率将受到严重制约。本文提出将耦合机构工作频率设置在原边线圈和副边线圈自谐振频率之间的一个最佳频率点,可有效提高耦合机构保持高效率运行时的最大输出功率。首先推导了耦合机构原、副边线圈自谐振频率相同和不同时耦合机构高效率运行时的最大输出功率表达式,分析了耦合机构输出功率较低的原因。然后,分析了提高耦合机构输出功率的方法,推导出了耦合机构高效率运行时获得最大输出功率的工作频率点。结果表明,与原边谐振相比,采用本文所提出的开关频率计算方法,耦合机构的最大输出功率提升了92.5%。Due to manufacturing process and the diversity of device parameters,etc.,the self-resonant frequencies of the primary and secondary coils of the inductive power transfer system(IPT)may be different.Usually,a controllable rectifier is used on the secondary side of the coupling mechanism to perform the impedance transformation to make the coupling mechanism operate at high efficiency condition.However,the maximum output power of the coupling mechanism will be severely restricted when the coupling mechanism operates at the primary or secondary coil self-resonant frequency.This paper proposes to set the switching frequency to a specific frequency point between the self-resonant frequencies of the primary and secondary coil to improve the maximum output power of the coupling mechanism while maintaining the highest efficiency.Firstly,the expressions of the maximum output power of the coupling mechanism with the same and different self-resonant frequencies of the primary and secondary coils are deduced.The reason why the maximum output power of the coupling mechanism is low is analyzed.Then,the maximum output power of the coupling mechanism maintaining the highest efficiency is improved by setting the switching frequency to a specific frequency point between the self-resonant frequencies of the primary and secondary coil.The experimental results show that,compared with using primary resonant frequency,the maximum output power of the coupling mechanism is increased by 92.5%using the switching frequency setting method proposed in this paper.

关 键 词：感应电能传输 非同时谐振 提升功率 效率优化 

分 类 号：TM724[电气工程—电力系统及自动化]