基于LLC谐振并联均流模块化高频充电机的研究与设计

发布时间：2018-01-08 13:36

本文关键词：基于LLC谐振并联均流模块化高频充电机的研究与设计　出处：《南京理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着传统能源价格的不断升高及社会环境问题的加重,新能源汽车受到了各大汽车公司的青睐,加之软开关技术、并联均流技术及电子器件的不断发展,为高性能大功率模块化电源发展创造了条件。本文研究设计了一款基于LLC谐振半桥拓扑结构的高频充电机模块。本文详细介绍了LLC谐振变换器的工作原理,运用基波分析法对其数学建模,并分析其频域特性、空载特性及短路特性,给出一套完整的半桥LLC谐振参数设计方法。基于此理论,设计最大输出功率100V/100A充电机模块,考虑到三相交流电的特性,采用三相33.3A均流输出。通过对开关电源主电路拓扑结构对的研究及考虑车载蓄电池对其充电效率着不得低于90%的要求,硬开关电源技术很难做到,为此,采用软开关技术,实现模块电源零电压开通(ZVS)和零电流关断(ZCS)。每相主电路选取采用前级PFC、后级LLC变换两级拓扑结构,再加以并联均流技术实现正机模块化功率输出,并利用saber软件对设计主电路进行仿真验证,完成整个电路主体设计及主要器件选型。最后研制了10kW带功率因数校正的高频充电机模块,并对其单相模块及整机测试,结果表明,整机效率不低于90%,证明理论分析的正确性及参数设计方法的可行性,并说明LLC谐振变换器可应用到几千瓦大功率电源模块。
[Abstract]:With the increasing of the traditional energy price and the aggravation of the social environment problem , the new energy automobile has been favored by the big automobile companies , the soft switching technology , the parallel current sharing technology and the development of the electronic device , which has created the conditions for the development of the high - performance high - power modular power supply . The paper designs a high - frequency charger module based on LLC resonant half - bridge topology structure . In this paper , the working principle of LLC resonant converter is introduced in detail , and its frequency domain characteristics , no - load characteristic and short - circuit characteristic are analyzed by using fundamental wave analysis method . A complete set of half - bridge LLC resonant parameter design method is given . Based on this theory , a complete set of half - bridge LLC resonant parameter design method is given . Finally , a 10kW high - frequency charger module with power factor correction is developed , and its single - phase module and complete machine are tested . The results show that the efficiency of the whole machine is not less than 90 % , the correctness of the theoretical analysis and the feasibility of the parameter design method are proved , and the LLC resonant converter can be applied to a few kW high - power power supply modules .

【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM46

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