六相感应电机直接转矩及容错控制  

Direct Torque and Fault Tolerant Control for Six-phase Induction Motor

作　　者：耿乙文[1] 鲍宇[2] 王昊[1] 马鸿宇[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏省徐州市221008 [2]江苏省城市规划设计研究院,江苏省南京市210036

出　　处：《中国电机工程学报》2016年第21期5947-5956,6039,共10页Proceedings of the CSEE

摘　　要：针对传统直接转矩控制转矩脉动大的问题,在考虑六相感应电机自身特点及分析其缺相数学模型的基础上,提出了一种六相感应电机直接转矩及容错控制方法。首先,建立和分析电机正常及缺相时的数学模型,并确定空间矢量脉宽调制(space vector pulse width modulation,SVPWM)方案以减小电机定子电流谐波含量;然后,通过对电机转矩和磁链进行分析,为直接转矩控制提供理论依据;在此基础上,利用模糊推理和改变矢量作用时间占空比的方法,使得逆变器可以输出任意角度和幅值的电压矢量。实验结果表明,该控制方案下电机转矩响应迅速,并能很好地改善电机转矩脉动和定子电流波形。The problem of large torque ripples exists in conventional direct torque control（DTC）. Based on the consideration of the six-phase induction motor with its own characteristics and analysis of the mathematical model, the paper proposed a six-phase induction motor direct torque control method. Firstly, the mathematical model of motors with normal and stator winding open-circuited conditions was built and analyzed respectively. Furthermore, formulation of a space vector pulse width modulation（SVPWM） provides a method to reduce stator current harmonics of the motor. Analysis of torque and flux provides a theoretical basis for the direct torque control. Finally, using the fuzzy reasoning and changing the duty ratio of the vector action time method, the inverter can output any angle and amplitude of the voltage vector. Experimental results show that the proposed strategy is able to reduce torque ripples and can improve current waveforms, and the torque dynamic response of the system is fast.

关 键 词：六相感应电机 直接转矩控制 电压重构 模糊逻辑 占空比控制 容错 

分 类 号：TM346[电气工程—电机]