i am implementing Classical DTC in simulink with improved stator flux estimation [Algorithm which was proposed in paper AN IMPROVED STATOR FLUX ESTIMATION IN STEADY STATE OPERATION FOR DIRECT TORQUE CONTROL OF INDUCTION MACHINES ],during this implementation i am facing problem to estimate the synchronous frequency.
As it was given in paper that
We ={ [ V - i*r] / (Si_s^2 )} . j si_s
my doubt is that as the voltage is pulsed stepped waveform of magnitude 2/3*Vdc peak to peak and subtraction of i*Rs drop gives the result of emf(v-i*rs) of (2/3*Vdc) +/- 20 , and the wave form look like voltage wave form.How can we get synchronous frequency from this noisy waveform even after it has been divided with si_s^2 and it multipled with j*si_s.
Kindly reply
I dont know that paper. But this paper helped me for a similar problem. Maybe it helps you as well.
E. Vazquez-Sanchez, J. Gomez-Gil, and M. Rodriguez-Alvarez, “Analysis of three methods for sensorless speed detection in dc motors,” in Power Engineering, Energy and Electrical Drives, POWERENG’09. International Conference on. IEEE, 2009, pp. 117–122.
I think you should focus your research a bit more in practical issues of the motor, but you decide, greetings.
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