Boost矩阵变换器的离散滑模控制策略

Discrete sliding mode control strategy of boost matrix converter

针对目前矩阵变换器存在电压传输比低的缺陷,在对拓扑结构的基本构成及其工作原理分析基础上,提出一种新型的称为Boost矩阵变换器的电路拓扑结构。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,阐述了所采用的离散滑模控制策略的设计方法,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在一定范围内的任意调节,其电压传输比既可大于1,也可小于1,且直接输出高品质的正弦波而无需滤波环节,从而有效解决了传统矩阵变换器电压传输比低的难题。

Based on the low voltage transfer ratio of matrix converter, a novel matrix converter called as boost matrix converter was proposed. The basic configuration of this new topology and its fundamental were introduced, the analytic expression concerning functions relation of voltage transfer ratio to duty cycle was deduced, the design method of the discrete sliding mode control strategy was clarified particularly. Finally the validity and feasibility of the new topology were tested by simulation, whose results show that the output voltage and frequency can be modulated optionally within some scope through this 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 problem of matrix converter with low voltage transfer ratio is solved effectively by this study.