摘要
在LLC的基础上,从软开关技术、DC/DC级联变换器技术以及三电平技术的角度去思考,提出一种基于Buck-LLC的新型DC/DC复合式级联结构拓扑。搭建了980W样机进行验证,证明该复合式Buck-LLC级联变换器在保持传统Buck-LLC级联变换器效率的前提下能够有效减小前级Buck电路处理功率,减小体积并提高功率密度,也能够有效减小母线电容耐压值,并且保持PWM闭环调制的优点,能够输出稳定的电压,后级LLC定频的工作参数设计更加方便。
On the basis of LLC,considering from the perspectives of soft-switching technology,DC/DC cascade converter technology and three-level technology,a new DC/DC composite cascade structure topology on the basis of Buck-LLC structure was proposed.A 980 W prototype was designed and built for verification,which prove that the proposed composite Buck-LLC cascade structure can effectively reduce the processing power of the previous Buck circuit,and reduce the Buck inductor volume,and increase power density while maintaining the efficiency of the traditional Buck-LLC cascade structure.It can also effectively reduce the withstand voltage value of the bus capacitor and maintain the advantages of PWM closed-loop modulation,and can output a stable voltage.In addition,the design of the working parameters of the subsequent LLC fixed frequency is more convenient.
作者
蒋婧文
周洁敏
洪峰
郑罡
JIANG Jingwen;ZHOU Jiemin;HONG Feng;ZHENG Gang(School of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,Jiangsu,China;School of Electronic Information,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,Jiangsu,China)
出处
《电气传动》
2023年第9期3-8,共6页
Electric Drive
