Abstract—Direct Torque Control (DTC) is widely used for ac drives. Attempts to combine DTC with Space Vector Modulation (SVM) have led to new ways. A new approach to DTC-SVM is presented in this paper. A Correlated Real Time Recurrent Learning (CRTRL) algorithm based Recurrent Neural Network (RNN) is used to estimate stator and rotor flux. Through measurement of the phase flux linkages and phase currents the RNN is able to estimate the rotor position, thereby facilitating elimination of the rotor position sensor. Fast dynamic speed response is obtained through maintaining the rotor flux constant as in the case of field orientation control. The control method proposed in this paper can reduce the torque, stator current, and rotor flux ripples which improve the system dynamic performance and robustness in different operating conditions. The proposed controller is also computationally efficient. The control methodologies and simulation results are given and discussed.

Index Terms—Direct torque control, space vector modulation, induction motor, flux estimation, torque ripple, flux ripple.

M. Habibullah is with the Electrical and Electronic Engineering Department, Khulna University of Engineering and Technology, Khulna, Bangladesh (Corresponding author to provide phone: +8801731171757, e-mail: mhueeekuet@gmail.com).
 M. J. Islam is with the Electrical and Electronic Engineering Department, Khulna University of Engineering and Technology, Khulna, Bangladesh (e-mail: jahirul_kuet@yahoo.com)
M. A. Rafiq is with the Electrical and Electronic Engineering Department, Khulna University of Engineering and Technology, Khulna, Bangladesh (e-mail: mdabdurrafiq2003@ yahoo.com).
K. K. Halder is with the Electrical and Electronic Engineering Department, Khulna University of Engineering and Technology, Khulna, Bangladesh (e-mail: kalyan_kuet@yahoo.com)
B. C. Ghosh is with the Electrical and Electronic Engineering Department, American International University-Bangladesh, Dhaka, Bangladesh (e-mail:bcgkuet@aiub.edu).

Cite: Md. Habibullah, Md. Jahirul Islam, Md. Abdur Rafiq, Kalyan Kumar Halder, and B. C. Ghosh, "A New DTC-SVM Based Control of Field Oriented Position Sensorless Induction Motor Drive with Reduced Torque and Flux Ripple ," International Journal of Computer and Electrical Engineering vol. 3, no. 3, pp. 327-334, 2011.