无刷双馈电机直接转矩控制策略的研究

Study on the Strategy of Direct Torque Control for Brushless Doubly-Fed Machines

研究了无刷双馈电机和直接转矩控制策略,提出了一种磁链和转矩的计算方法,实现了在不同坐标系下对磁链和转矩的计算,简化了磁链、转矩观测器的数学模型,给出了基于这一方法的无刷双馈电机直接转矩控制策略的仿真模型,并进行了系统仿真,结果表明该系统结构简单,目标明确,计算量小,控制准确,实时性好,在亚同步电动和超同步电动状态下均可适用。

In this paper, the direct torque control strategy for brushless doubly - fed machines is investigated. With the help of different coordinates, a simple method of calculating flux linkages＆torques is proposed. The direct torque controller based on the method renders a simple structure and a explicit goal. The simulation shows that fast response and precision of control are achieved; the system is reasonable at under synchronization electromotor condition and super synchronization electromotor condition.