静止坐标系下无刷双馈感应电机的直接转矩控制  

Direct Torque Control for Brushless Doubly-Fed Induction Machine in Static Reference Frame

作　　者：张爱玲[1] 贾文霞[1] 周赞强[1] 王昕[1] 王建华[1] 

机构地区：[1]太原理工大学电气与动力工程学院,太原030024

出　　处：《电工技术学报》2012年第7期63-70,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50877051)

摘　　要：提出了一种静止坐标系下无刷双馈感应电机的直接转矩控制策略,推导了电磁转矩的计算方法,即分别在控制绕组和功率绕组各自静止的坐标系观测其磁链、电流,进而计算转矩,以避免旋转坐标变换,减少对电机参数的依赖。构建了同时适用于亚同步及超同步电动运行状态的开关表。除了需要多观测一个定子绕组的电压、电流之外,系统结构和异步电机直接转矩控制系统一样简洁明了。样机的稳态及动态实验结果表明,在亚同步、超同步及同步等较宽的转速范围内转矩观测稳定、准确;在速度给定阶跃变化及负载扰动的动态过程中,系统运行稳定。A direct torque control（DTC） strategy in static reference frame for brushless doubly-fed induction machine is presented in this paper. The estimation method for electromagnetic torque is deduced, that is, to observe fluxes and currents of power winding（PW） and control winding （CW） in the local ot13 reference frame respectively, and then estimating the torque. Thus rotation coordinate transformation is prevented and parameters used in system are reduced. In addition, the switch table applied to both sub-synchronous and super-synchronous is constructed. The system＇s structure is as simple as that for the DTC of induction machine, except that voltage and current of one more stator winding are required. The experimental results on a prototype show that the estimation of torque is stable, the speed for BDFIM is stably controlled from super-synchronous to sub-synchronous, and the controller can stabilize the system and maintain the desired speed when sudden torque changes are applied.

关 键 词：无刷双馈电机 静止坐标系 电磁转矩 直接转矩控制 

分 类 号：TM301.2[电气工程—电机]