近距离下串联补偿无线电能传输变换器特性时域分析  

Time domain analysis of series compensated wireless power transfer converter at short range

作　　者：刘硕[1] 苏建徽[1] 张健[1] 徐海波 LIU Shuo;SU Jianhui;ZHANG Jian;XU Haibo(Photovoltaic System Research Center of MOE,Hefei University of Technology,Hefei 230009,China;Dongguan Southern Semiconductor Technology Co.,Ltd.,Dongguan 523000,China)

机构地区：[1]合肥工业大学光伏系统教育部工程研究中心,安徽合肥230009 [2]东莞南方半导体科技有限公司,广东东莞523000

出　　处：《电力自动化设备》2022年第2期155-162,共8页Electric Power Automation Equipment

基　　金：广东省重点领域研发计划资助项目(2019B010127001)。

摘　　要：在近距离下,随着松耦合变压器(LCT)耦合度增高,串联-串联(SS)补偿无线电能传输(WPT)变换器的谐振网络内部出现大量谐波,传统的基波分析法(FHA)无法反映谐波对变换器传输特性的影响。归纳出稳态下SS补偿WPT变换器的P(Positive)、O(Open)、N(Negative)这3种工作状态;以子区间分析法,分析了在它们构成的PN与PON这2种工作模式下变换器的输出特性,计算了逆变电路开关管的开通与关断电流,并对比了FHA与所提时域分析法计算结果差异;分析了这2种工作模式的边界条件与LCT耦合度的关系。最后,通过样机实验验证了理论分析的正确性。At short range,as the coupling factor of LCT(Loosely Coupled Transformer)increases,abundant harmonics occur in the resonant network of SS(Series-Series)compensated WPT(Wireless Power Transfer)converter,whereas the traditional FHA(Fundamental Harmonic Analysis method)cannot reflect the influence of harmonics on the converter’s transmission characteristics.Three operating states of SS compensated WPT converter,P(Positive),O(Open)and N(Negative),under steady state,are concluded.By subinterval analysis method,the output characteristics of the converter under PN and PON modes they composed are analyzed,the switching on and off currents of the inverter switches are calculated,and the result of the proposed time domain analysis method is compared with that of FHA.The relationship between the LCT coupling factor and the boundary conditions of these two modes is analyzed.Finally,the experimental results of the prototype verify the correctness of the theoretical analysis.

关 键 词：无线电能传输 串联补偿 LLC谐振变换器 时域分析 工作模式 

分 类 号：TM46[电气工程—电器] TM724