摘要
针对LLC谐振变换器轻载时,变换器随着开关频率的增加,与全载高效率相比难以提高轻载工作效率的缺陷问题,提供一种PFM与PWM控制相结合混合控制策略,轻载时采用PWM控制模式,满载时采用PFM控制模式,两种工作模式可以自由切换,实验结果验证LLC谐振变换器在轻载和满载范围内可以实现软开关,提高LLC谐振变换器工作效率。
For the light load of LLC resonant converter,it is difficult to improve the light load efficiency compared with the full load,providing a hybrid control strategy of PFM and PWM.The PWM control mode is used in light load and the PFM control mode is used in full load.Two modes of work can be switched freely.Experimental verification shows that LLC resonant converter can realize soft switch in light load and full load range,Improving the work efficiency of LLC resonant converter.
作者
刘传洋
孙佐
刘景景
LIU Chuanyang;SUN Zuo;LIU Jingjing(Department of Mechanical and Electrical Engineering of Chizhou College,Chizhou Anhui 247000,China)
出处
《上饶师范学院学报》
2018年第6期24-28,共5页
Journal of Shangrao Normal University
基金
池州学院自然科学研究资助项目(2017ZRZ005
2016ZRZ006)
关键词
轻载
全载
效率
LLC谐振变换器
软开关
light load
full load
efficiency
LLC resonant converter
soft switch
