基于DSP的感应电机直接转矩控制研究

DSP-Based Ripple Reduction in Direct Torque Control

在传统的异步电机直接转矩控制中,在低速时的转矩波动会使控制系统性能变差。这里采用高性能的磁链观测器来准确观测磁链,并且采用转矩与磁链双层滞环比较器来优化改进开关选择表。仿真与实验结果证明本文的控制方案能有效降低低速时的转矩波动。

The torque ripple will degrade the performance of the classical direct torque control for asynchronous motor in low speed. This paper introduces a high performance flux observer,and the switching table is also improved by using two-level torque and flux comparators. Simulation and experimental results show that this scheme can effectively reduce the torque ripple in low speed.