摘要
多输入变换器允许幅值和特性不相同的多个电源输入,与多个单输入直流变换器相比,多输入Buck变换器可以共用一套滤波电感和滤波电容,可以减少器件数量,简化电路结构,减小变换器体积。基于单周期控制原理,针对双输入分时Buck变换器提出了一种简单易实现的新型控制策略。采用单一电压控制环路完成对两个输入源的控制,一个工作周期包含两个子周期,通过调整两个子周期的时间比可以实现两个输入源的功率分配和工作模式的切换。并对其控制原理和性能进行了理论分析,最后通过实验验证了理论分析的正确性。
Multiple-input converters permit to interface various sources and to regulate the power flow between the sources. The use of a multiple-input Buck converter has the advantage of simpler circuit design and lower cost, compared with the conventional use of several single-input converters. Based on the one-cycle control, a simple control strategy for Double- Input Time-Sharing Buck converter is proposed in this paper. Two voltage sources are controlled by one control loop. In one operating cycle, the two voltage sources deliver alternately power to load. One operating cycle has two sub-cycles. Power management and operation mode transitions can be achieved by adjusting the two sub-cycles. The novel switching strategy and control performances are studied. The theoretical analysis is verified with experimental results.
出处
《自动化技术与应用》
2016年第5期87-92,共6页
Techniques of Automation and Applications
关键词
双输入分时Buck变换器
单周期控制
功率分配
模式切换
double-input time-sharing Buck converter
one cycle control
power management
operation mode transitions
