异步电动机的SVM-DTC控制

Direct Torque Control for Induction Motor Based on Space Vector Modulation

针对基本直接转矩控制(BASIC-DTC)转矩和磁链脉动大的缺点,采用空间电压矢量调制与直接转矩控制相结合(SVM-DTC)的方法,以减小转矩和磁链脉动;为了提高定子磁链的观测精度,利用全阶磁链观测器观测定子磁链,并提出一种单自由度极点配置方法实现磁链观测器的极点配置。仿真结果表明,系统不但实现了转矩和磁链的定量控制,降低了转矩脉动和磁链脉动,提高了定子磁链的观测精度,而且同时使得逆变器开关周期恒定,更易于数字化实现。

For the disadvantage of the basic direct torque control （BASIC-DTC） ＇s torque and flux ripple when it runs, the direct torque control combined with space vector modulation （SVM-DTC） was used to reduce the torque and flux ripple. To improve the accuracy of the stator flux observation, the full order flux observer was used to achieve the stator flux observation. The new method of pole placement was proposed to achieve the configuration of the flux full order observer gain matrix parameters. The simulation results show that the torque ripple and flux ripple is reduced and the accuracy of the stator flux observation is improved, and in this method the invertor has constant switching period and is easy to realizing digital.