• M V Ramana Rao
• CH Siva Kumar

Abstract : This paper is to present the complete modeling and simulation of Predictive Direct Torque Control technique for Surface Mounted Permanent Magnetic Synchronous Motor to have good dynamic response. A sensor-less strategy is presented here to make system stable mechanically. The upcoming requirement in torque is predicted in advance. This is control scheme helps in digital implementation. A predictive DTC algorithm calculates the switching instants of two optimum active voltage space phasors (AVSPs) that build torque demand one step in advance. After that, the trajectory of the stator flux is predicted for the two preselected AVSPs and the AVSP that leads to the best trajectory of the stator flux at the end of the cycle will be applied to the machine at the next control cycle. With this control scheme is possible to obtain similar dynamic performance as with the conventional DTC scheme, with the advantages of inherently constant switching frequency and equidistant control sampling times for easy digital implementation. As an enhancement of this predictive DTC an encoderless strategy is proposed here. The rotor position is predicted through the future value of the stator flux which is estimated by using the measured stator currents and reconstructed stator voltages. Then, the estimated rotor position is processed by means of a Quadrature Phase-Locked Loop observer, so that, easy digital implementation and stable operation can be achieved. Simulated results confirm the theoretical work..

Active voltage space phasor, Brushless Direct current, Digital quadrature phase-locked loop, Flux hysteresis width.

"Predictive Direct Torque Control technique for Surface Mounted Permanent Magnet Synchronous Machine", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 2, page no.f287-f293, February-2024, Available :http://www.jetir.org/papers/JETIR2402535.pdf

"Predictive Direct Torque Control technique for Surface Mounted Permanent Magnet Synchronous Machine", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 2, page no. ppf287-f293, February-2024, Available at : http://www.jetir.org/papers/JETIR2402535.pdf