一种低输入电压的微型太阳能充电器  

Low input voltage small form factor solar power charging module

作　　者：杨炀[1,2] 刘青 王子才 张华[2] Yang Yang;Liu Qing;Wang Zicai;Zhang Hua(Harbin Institute of Technology,Harbin 150001,China;Shenzhen Academy of Aerospace Technology,Shenzhen 518057,China)

机构地区：[1]哈尔滨工业大学,黑龙江哈尔滨150001 [2]深圳航天科技创新研究院,广东深圳518057

出　　处：《电子技术应用》2021年第4期121-125,共5页Application of Electronic Technique

摘　　要：分析了移动便携式太阳能发电应用中太阳能电池阵列受照情况的特点及其对有效输出功率的影响,指出该类应用中应尽可能减少阵列的串联数,增加并联数以减少部分遮挡或受照不均匀造成的功率损失。针对这一需求,采用LT8490控制器,设计了一款具有最大功率点跟踪功能的升降压太阳能充电模块,通过分析控制器的工作原理,提出了一种拓展输入电压下限的方法,使其能更好地解决移动便携式应用中减少串联数导致阵列输出电压较低的问题。实验测试表明,该方法可行有效,设计的微型太阳能充电模块能满足移动便携式应用中太阳能电池阵列串联数较少、输出电压较低的要求。This paper analyzes the characteristics of solar array illumination in mobile and portable solar power generation applications and its impact on output power.It is pointed out that in such applications,the number of solar cells in series should be reduced as much as possible,and the number of parallel connections should be increased to reduce partial shading or non-unified illumination.In response to this demand,the LT8490 controller is used to design a Buck-Boost solar charging module with Maximum Power Point Tracking(MPPT)function.A method to extend the lower limit of the input voltage is proposed to make it better to solve the problem of lower array output voltage caused by reducing the number of solar cells in series.Experimental tests show that the method is feasible and effective.The proposed solar power charging module can meet the requirements of fewer solar cells in series and lower output voltage in mobile and portable applications.

关 键 词：便携式太阳能充电 最大功率点跟踪 Buck-Boost拓扑 

分 类 号：TM921.5[电气工程—电力电子与电力传动]