基于反电动势估计的异步电动机离散直接转矩控制方法

本文介绍了一种基于反电动势估计的异步电动机离散直接转矩控制方法（DTDTC），利用这种方法可以实现对电磁转矩和定子磁链模值的精确控制，在实现过程中，只需要知道少量的电动机参数一定子电阻和定子漏感，因而，这种控制方法对电动机参数变化具有较强的鲁捧性。另外，详细分析了计算延迟对系统性能的影响，在此基础上，对基本DTDTC控制方法进行了改进。最后，对这种控制方法进行了实验验证，实验试验结果表明了这种控制方法的有效性。

Based on Back-EMF Estimation Discrete Time Direct Torque Control of Induction Machines

In this paper, Discrete Time Direct Torque Control (DTDTC) of induction machines is proposed based on Back-EMF estimation.The precise control of the torque and stator flux is achieved. The proposed control requires knowledge of a small number of induction motor parameters including the stator resistance and leakage inductance, so has strong robustness to the varieties of the parameters. The effect of calculation delay is studied and a modified control method is proposed to take into account this calculation delay. The validity of the proposed method is demonstrated using experimental results.