带有折角的直接转矩控制技术研究

Research on direct torque control with folded angle

大功率交流传动系统应用直接转矩控制技术时,往往对定子磁链实施六边形轨迹的控制方案,以维持较小的开关频率,但此时定子电流中会有较大的谐波分量。文章对引入折角的控制方案进行研究,结果表明,通过引入适当的折角,定子电流谐波分量会有较大的减少。

When used in the high power AC drive system,the direct torque control scheme is often based on hexagon stator's flux linkage locus so as to keep the low switching frequency. Yet higher harmonic components will be found in the stator's current at this time. After the folded angle is introduced, the harmonics will be decreased greatly, and this will be proved in this paper.