【摘要】 为了提高五相异步电机调速系统的性能,提出一种新型的五相双级矩阵变换器。该变换器实现了三相输入、五相输出的直接功率变换,通过采用改进的双级拓扑结构,解决了传统矩阵变换器向多相拓展换流复杂度增加的问题。介绍了几种五相双级矩阵变换器的拓扑结构,针对五相双级变换器的空间矢量调制控制策略进行了理论推导,对变换器的控制策略的可行性进行了仿真的实验验证。仿真和实验结果表明:所提出的变换器输入电流和输出电压为正弦,谐波小且输入功率因数可控,并可实现零电压换流。更多还原

【Abstract】 In order to improve the performance of five-phase induction motor speed adjustment system,a new type of five-phase two-stage matrix converter was proposed.A three-phase to five-phase direct power conversion was implemented for this converter.With an improved two-stage topology of the new converter,the problem of conventional matrix converter which increases complexity of commutation when it is expanded to multi-phase,was resolved.Some types of five-stage matrix converter’s topologies were presented,and a theoretical space vector derivation on a five-phase two-stage matrix converter was carried out.Simulation and experimental results show that the proposed converter has sine wave input current and output voltage,low harmonic content,adjustable power factor,and zero voltage commutation.更多还原