一种新型Boost矩阵变换器及其控制策略

针对传统矩阵变换器存在电压传输比低的问题,提出一种新型的矩阵变换器电路拓扑结构。研究该拓扑结构的基本构成和工作原理,推导并分析其电压传输比与占空比之间函数关系的解析表达式,阐述2种有效控制策略即滑模控制和双闭环控制的基本设计方法并对比分析其不同的特点,最后通过仿真对其有效性和可行性进行验证。研究结果表明:该新型电路在2种控制方案下均能实现电压传输比和输出频率的任意调节,且输出电压波形的正弦性好,失真度小,有效地解决了传统矩阵变换器电压传输比低的问题。

A new Boost matrix converter and its control strategy

Based on the low voltage transfer ratio of conventional matrix converter,a new matrix converter referred to as a 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 two effective control strategies,i.e.,sliding mode control and double-loop control,were expounded particularly and their different attributes were compared.The validity and feasibility of the new topology were tested by simulation.The results show that the modulation of voltage transfer ratio and output frequency can be achieved optionally through this new converter by means of the two control strategies and an ideal sine output wave with less distortion can be gotten,so the inherent problem of conventional matrix converter with low voltage transfer ratio is solved effectively.