无速度传感器十二区段直接转矩控制

Twelve-section control methods of direct torque control with speed-sensorless

由于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,容易造成转矩脉动大。提出了电压选择表十二区段控制方法及其实现方法,利用电动机定子电压方程和电流方程得到电动机转速的模型参考自适应辨识算法,建立了一个改进的变参数速度辨识数学模型,仿真结果表明,这种基于变参数模型参考自适应法的十二区段控制具有更好的性能。

Due to hexagon flux control or six-section circle-flux used in traditional direct torque control （DTC） , it is easy to form large torque ripple twelve section control method of voltage select table and the implementation was presented. According to the reduced order model of induction motor, a variable parameter model reference adaptive system （MRAS） speed identification algorithm was obtained from the equations of motor stator voltages and currents. The simulation results show that this twelve section control method based on improved MRAS speed identification model satisfies identification precision and dynamic performance.