基于矩阵变换器的异步电机直接转矩控制

Direct Torque Control of Induction Motor Fed by Matrix Converter

在最近几年,矩阵变换器受到广泛的关注,但主要集中在矩阵变换器本身的研究。提出了一种适用于矩阵变换器供电的异步电动机调速系统的组合控制策略,同时实现了矩阵式变换器的空间矢量调制和异步电动机的定子磁场定向直接转矩控制。该控制策略将矩阵式变换器的良好性能和直接转矩控制的优点结合起来,实现了异步电动机的高性能控制,提高交流调速性能并满足节能要求。仿真结果表明:使用该控制策略的调速系统在加减速运行和负载转矩变化等场合均具有良好的动态性能。

Matrix converters have received considerable attention in recent years, but the study focus is matrix converter per se. A combined control strategy for matrix converter fed induction motor drive system was proposed, which implements both space vector modulation of matrix converter and direct field oriented control of induction motor. Using this combined control strategy, it is possible to combine the advantages of matrix converter and the advantages of direct torque control technique and realize high performance control of induction motor. Simulation results show the good performance of the drive system in dynamic conditions, in terms of acceleration, deceleration and load torque changes.