IM Direct Torque Control with no flux distortion and no static torque error
Abdesslam Lokriti1, Issam Salhi2, Said Doubabi2
1Laboratory of Informatics, Systems, Electrical, Networks and Telecommunications, Univ Hassan 1, LISERT-ENSA, Boulevard Béni Amir, BP 77, 25000, Khouribga, Morocco.
Abstract:
The purpose of this paper is to improve DTC control strategy performances. In fact, we propose controlling both stator flux components (real and imaginary) through two hysteresis controllers. Thus, a new switching table which is independent from sector determination, and does not introduce zero voltage vectors is established; with much reduced size when compared to Takahashi's one. The proposed strategy has allowed cutting off with flux and current harmonics related to distortion caused by sector exchanges. Also, we provide theoretical evidence about the existence of static torque error in classical DTC, and propose a simple PI-type controller to cancel it. The proposed strategy is validated by simulation and practically on a DSPace 1104 board, for a 1.5 (kW) induction motor and various torque references.
Related Concept Videos
Time-Domain Interpretation of PD Control
Consider the example of control of motor torque. Initially, a positive...
Torque On A Current Loop In A Magnetic Field
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
Torque Free Motion
Torque
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
Net Torque Calculations
Residual Stresses in Circular Shafts


