晶闸管和IGBT混合的三相电机两相变频控制策略  

Two-phase variable frequency control strategy of three-phase motor mixed with thyristor and IGBT

作　　者：谢仕宏[1] 梁荣茂 梁力[1] XIE Shihong;LIANG Rongmao;LIANG Li(School of Electrical and Control Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学电气与控制工程学院,西安710021

出　　处：《中南民族大学学报（自然科学版）》2024年第2期252-259,共8页Journal of South-Central University for Nationalities：Natural Science Edition

基　　金：国家自然科学基金资助项目(51577110);陕西科技大学科研启动基金资助项目(2020BJ-11)。

摘　　要：现有三相交直交变频电路中大多使用IGBT作为电力电子器件,为了进一步降低低压大容量变频器设备成本,减少IGBT的使用,提出了一种晶闸管和IGBT混合的三相电机两相变频电路结构及四开关八电压矢量直接转矩控制策略.首先分析了利用IGBT辅助晶闸管关断的三相电机两相变频电路结构,并分析了不同开关状态下的瞬时电路工作原理,给出三相四开关拓扑下的八电压矢量生成方法;其次提出四开关八矢量异步电机直接转矩控制策略,并给出扇区划分、电压矢量选择和电压矢量伏秒生成原理;最后通过仿真实验验证所提策略的正确性和可行性.仿真结果验证了上述电路结构和控制方法的有效性.IGBT is mostly used as power electronic device in the existing three phase AC/DC converter circuit.In order to further reduce the cost of low-voltage high-capacity converter equipment and reduce the use of IGBT,a three-phase motor two-phase converter circuit structure with thyristor and IGBT and a four switch eight voltage vector direct torque control strategy are proposed.Firstly,the two-phase frequency conversion circuit structure of three-phase motor with IGBT assisted thyristor switching is analyzed,and the instantaneous circuit working principle under different switching states is analyzed.The eight voltage vector generation method under three-phase four switch topology is given.Secondly,the four switch eight vector asynchronous motor direct torque control strategy is proposed,and the sector division,voltage vector selection and voltage vector volt second generation principle are given,Finally,the correctness and feasibility of the proposed strategy are verified by simulation experiments.The experimental results verify the effectiveness of the circuit structure and control method.

关 键 词：三相电机 两相变频 晶闸管 八电压矢量 直接转矩控制 

分 类 号：TM921[电气工程—电力电子与电力传动]