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Direct Torque Control for Brushless Doubly-Fed Induction Machine in Static Reference Frame
Author(s): 
Pages: 63-70
Year: Issue:  7
Journal: Transactions of China Electrotechnical Society

Keyword:  无刷双馈电机 静止坐标系 电磁转矩 直接转矩控制;
Abstract: 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。
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