基于DSP的异步电机改进型直接转矩控制研究

Research on improved direct torque control system of asynchronous motor based on DSP

传统的直接转矩控制采用六边形磁链控制或六区间的圆形磁链控制,特别是当考虑定子电阻压降的影响时,转矩脉动很大。针对传统六区段控制方式电压选择表的缺陷,提出了十二区段控制方法及其电压选择表的实现方法。实验结果表明十二区段控制方法较六区段控制方法具有更好的控制性能。

Traditional DTC applies hexagon flux control or six-section circle-flux. Especially when the voltage of stator resistance is considered,the torque ripple is big. To deal with the defect of traditional six section control of voltage vector table, a implementation based on twelve section control method and voltage select table are put forward. The results of experiment verify the better performance of twelve section control method.