一种输出并联开关电源均流控制策略  

A control strategy for parallel current sharing technology in switching power supply

作　　者：杜松林[1] 王瑾[1] 张晓锋[1] 

机构地区：[1]中国地质大学机械与电子信息学院,湖北武汉430074

出　　处：《电源技术》2012年第7期1037-1038,1061,共3页Chinese Journal of Power Sources

摘　　要：以Buck型DC/DC拓扑为基础,采用开关型降压稳压芯片LM2576作为DC/DC稳压电源的稳压器,设计制作了两个DC/DC降压型稳压电路模块,以MSP430单片机为控制器,对负载电流和主开关电源的输出电流进行采样,在此基础上固定其中一个开关电源的输出,单片机通过DA对另一个开关电源的输出电流进行控制,从而使两路开关电源的输出电流按照指定的比例输出,实验验证了本方法可以获得很高的均流精度。Based on the Buck-type DC/DC topology, with the IC LM2576 as the controller of the switching power supply, two kinds of DC/DC Buck-type switching power supply were designed. With the MUC MSP430 as the controller, the load current and the main switching power supply＇s output current was sampled. Then, one of the two switching power supply＇s output current was fixed, and the MUC controlled another＇s output current through the DA, to make the two kinds of switching power supply＇s output current change according to the specified ratio. The experiment verifies that this method can obtain very high accuracy of current-sharing.

关 键 词：开关电源 并联 均流 高精度 

分 类 号：TM46[电气工程—电器]