七相感应电机缺相建模与控制研究  

Research on Model and Control of 7-Phase Induction Motor under Open-Phase Fault

作　　者：郭冀岭[1] 肖建[1] 邱忠才[1] 罗鹏[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《计算机仿真》2014年第5期218-223,228,共7页Computer Simulation

基　　金：国家自然科学基金(51177137)

摘　　要：在电机调速控制问题的研究中,七相感应电机调速系统缺相运行具有代表性,近年受到关注。在七相电机正常情况下,根据空间解耦模型和SVPWM调制算法,在机电能量转换的基波子空间内作用电压矢量的同时,也会在3次、5次谐波子空间产生谐波电流。在缺相情况下,电压矢量分布变化,获取严格的空间解耦模型较为困难。为解决上述问题,采用缺相简化模型,将七相电机缺一相及多相的各种情况进行建模,给出电压矢量分布,并分别采用传统直接转矩(DTC)和矢量控制(VC)进行仿真。传统DTC需针对不同缺相情况选择不同矢量,算法不具备通用性,且定子电流谐波含量大,高速性能、带载能力下降明显;为此,提出改进型UVM矢量控制,无需针对特定缺相情况,算法具有通用性,定子电流谐波含量小,带载能力也高于传统DTC。The seven-phase adjustable speed drive system has drawn more attention because of its typical openphase fault operation in recent years. Under normal circumstance, based on the decomposition model and SVPWM, the voltage vectors were used in fundamental wave subspace for electromechanical energy conversion, as well as in harmonic wave subspace for harmonic components of currents. Under open-phase fault circumstance, it is difficult to get the rigorous decomposition model because of the asymmetrical structure and vector distribution, so a simple model was adopted. Aiming at each one of 11 kinds of 7-phase IM open-fanh models, DTC and VC were simulated respectively. Compared with traditional DTC, the results show better commonality, higher load capacity and lower harmonic stator currents using VC with modified UVM.

关 键 词：七相感应电机 缺相故障 直接转矩控制 矢量控制 

分 类 号：TM343[电气工程—电机]