【摘要】 对传统矩阵变换器存在电压传输比低的缺陷进行研究,提出一种新型的称为Cuk矩阵变换器的电路拓扑结构。介绍了该拓扑结构的基本构成及其工作原理,推导了其电压传输比与占空比之间函数关系的解析表达式,阐述了所采用的双闭环控制策略的基本设计方法,并通过仿真对其有效性和可行性进行了验证。结果表明:该拓扑结构能实现输出电压和频率的任意调节,其电压传输比可大于1,也可小于1,且直接输出标准的正弦波而无需滤波环节,有效地解决了传统矩阵变换器电压传输比低的难题,具有一定的应用价值。更多还原

【Abstract】 The drawback of classical matrix converter having low voltage transfer ratio is studied and a topology of a new matrix converter called as a Cuk matrix converter is proposed.The basic configuration of this new topology and its fundamental are firstly introduced,the analytic expression concerning functions relation of voltage transfer ratio to duty cycle is deduced,and the basic design method of double-loop control strategy is expounded.Finally the validity and feasibility of the new topology are tested by simulation.The results show that the output voltage and frequency can be modulated optionally by the new converter,of which the voltage transfer ratio can be greater than 1,or lower than 1,and an ideal sine wave can be directly obtained without filtering.Thus the inherent problem of classical matrix converter having low voltage transfer ratio is effectively solved by this study,which is of certain practical importance.更多还原