基于Switch-Capacitor网络的单开关升压变换器  

A Single-Switch Step-up Converter Based on Switch-Capacitor Network

作　　者：侯世英[1] 陈剑飞[1] 孙韬[1] 张立帅[1] 邹学伟[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电工技术学报》2013年第10期206-216,共11页Transactions of China Electrotechnical Society

基　　金：输配电装备及系统安全与新技术国家重点实验室基金(2007DA10 512711204);中央高校基本科研业务费(CDJX12150005)资助项目

摘　　要：在新能源并网发电系统中,传统Boost变换器存在升压能力有限、纹波大和效率低等问题,为此,提出了一种基于Switch-Capacitor网络的单开关升压变换器,并推演出了相应的多级单开关升压变换器。详细分析了该变换器在CCM和DCM模式下的工作原理和工作性能,并搭建了实验模型,实验结果表明:①在不增加开关器件电压应力的情况下,随着串联的Switch-Capacitor网络个数的增加,这类变换器的升压能力逐渐增强;②输入电流纹波和输出电压纹波小;③变换器中只有一个开关管,控制电路简单;④可以根据串联网络个数的奇偶性改变输出电压的极性,扩大了该变换器的适用范围。In the renewable grid generation system, the traditional Boost converter has a constrained step-up ratio, big ripples and low efficiency. Therefore, a single-switch step-up converter based on the Switch-Capacitor network operationg is proposed, and its corresponding multi-stage single-switch step-up converter is deduced. Working principles and working performances of the converter in continuous operating mode and discontinuous operating mode are respectively given. An experimental model is built and its results indicates： （1）Not increasing the voltage stress of semiconductor devices, these converters＇ boost capability enhances as the number of Switch-Capacitor networks in series increases; （2）small input-current ripple and output-voltage ripple; （3）Since only one switch is needed in the converter, its control circuit is simple; （4）Based on the parity of the number of Switch-Capacitor networks in series, the polarity of output-voltage can be changed, which expands its range of application.

关 键 词：单开关 升压比 电压应力 纹波 极性 

分 类 号：TM464[电气工程—电器]