基于DSP的无速度传感器直接转矩控制系统

Study of Speed-Sensorless Direct Torque Control System on DSP

针对传统的直接转矩控制系统,定子磁链受定子电阻及积分计算的影响,辨识不准确及使用速度传感器的不足,通过采用新型磁链观测器,获得全速范围内准确的定转子磁链,并以此为基础,利用转子磁链误差辨识电机转速。通过实验证明系统有较好的性能。

In the conventional direct torque control system, the stator flux can't be identified accurately because of the changing of the stator resistance, and the speed sensor has its deficiency. This paper deals with the problems. The accurately stator and rotor flux of full-speed range is acquired by adopting new flux observer, and the motor speed is identified by adopting rotor flux error based on it.At the end, the simulation and experiment results were presented.