摘要
该文以单电感双输出(SIDO)Boost变换器为研究对象,详细分析电感电流工作于连续导电模式(CCM)的共模-差模电压型(CMV-DMV)控制SIDO Boost变换器的工作原理。采用时间平均等效电路建模方法,推导主电路的控制-输出、输出阻抗、交叉影响阻抗等传递函数。在此基础上,建立CMV-DMV控制CCM SIDO Boost变换器的闭环小信号模型,并利用Bode图从频域的角度分析变换器两条输出支路在不同输出电压等级下的交叉影响特性。研究结果表明,在两路输出电压不等时,CMV-DMV控制CCM SIDO Boost变换器的高压输出支路对低压输出支路的交叉影响较小;在两路输出电压相等时,先导通输出支路对后导通输出支路的交叉影响较大。实验结果验证了理论分析的正确性。
Taking single-inductor dual-output(SIDO)Boost converter in continuous conduction mode(CCM)as the research object,the working principle of CCM SIDO Boost converter controlled by common-mode voltage and differential-mode voltage(CMV-DMV)is analyzed in detail.The time-average equivalent circuit modeling approach is used to derive the transfer functions,such as control to output,output impedance and cross-regulation impedance,and so on.By establishing the closed-loop small signal model of CMV-DMV controlled CCM SIDO Boost converter,the cross-regulation characteristics in different output voltage levels are discussed by bode diagram in frequency-domain.The results show that,for CMV-DMV controlled CCM SIDO Boost converter,the cross-regulation of high-voltage output to low-voltage output is smaller than that of low-voltage output to high-voltage output when the two output voltages are not equal,while the cross-regulation of the first turn-on output branch to the second one is bigger than that of the second output branch to the first one when the two output voltages are equal.Finally,the correctness of the theoretical analysis is verified by the experimental results.
作者
冉祥
周国华
周述晗
Ran Xiang;Zhou Guohua;Zhou Shuhan(Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Ministry of Education School of Electrical Engineering Southwest Jiaotong University Chengdu 611756 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2019年第12期2519-2528,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金项目(61771405、61371033)
成都市科技局项目(2016-HM01-00139-SF)
西南交通大学优秀博士学位论文培育项目(D-YB201805)资助
关键词
单电感双输出
共模-差模电压型控制
小信号建模
交叉影响
Single-inductor dual-output(SIDO)
common-mode voltage and differential-mode voltage(CMV-DMV)
small signal model
cross-regulation
