一种Buck变换器并联均流系统的设计  

Design of a Buck Converter Parallel Current Sharing System

作　　者：宋伟 李昊远 张元科 徐浩东 韩猛 SONG Wei;LI Hao-yuan;ZHANG Yuan-ke;XU Hao-dong;HAN Meng(Institute of Electrical and Control Engineering,Heilongjiang University of Science and Technology,Harbin 150000,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,黑龙江哈尔滨150000

出　　处：《通信电源技术》2019年第5期20-21,共2页Telecom Power Technology

摘　　要：Buck变换器因其结构简单、体积小、成本低的优点,在中小功率领域获得了广泛应用。特别是在航天等特殊电源系统下,要扩大电源容量可采用并联均流技术。因此,设计了一种Buck变换器并联均流系统。采用一种数字控制均流方法,利用逻辑控制器监测各模块的输出电压和电流,比较各输出电压和电流,调制各模块的PWM控制不同模块。此外,基于整个数字控制均流方法的原理,对整个系统进行硬件结构设计和软件部分分析。最后,对整个并联均流系统进行了实验测试,实验结果验证了整个并联均流系统具有高动态性能和可靠性。Buck converter has been widely used in the field of small and medium power because of its simple structure,small size and low cost. Especially in special power supply systems such as aerospace,parallel current sharing technology can be used to expand power supply capacity. Therefore,a parallel current sharing system of Buck converter is designed. A digital control current sharing method is adopted. Logic controller is used to monitor the output voltage and current of each module,compare the output voltage and current,and modulate the PWM of each module to control different modules. In addition,based on the principle of the whole digital control current sharing method,the hardware structure design and software analysis of the whole system are carried out. Finally,the whole parallel current sharing system is tested by experiment. The experimental results verify that the whole parallel current sharing system has high dynamic performance and reliability.

关 键 词：BUCK 并联均流 数字控制 逻辑控制器 

分 类 号：TM46[电气工程—电器]