@LiteYear, thanks for taking the time to have a look at d model, i appreciate that, so you think having the motor model in d middle of the loop wont make it work, you could be right because on simulation i did get some errors, however with your idea of getting feedback from the motor shaft, how...
thanks to you all. basically the aim is to control the speed of the stepper motor, it is possible to have a closed loop system because what the phase locked loop does is that it synchronizes the motor speed with respect to the reference frequency so in essence controlling the freqeuncy in turn...
i am trying to control the speed of the stepper motor using phase locked loop, using simulink for the simulation. Want to know if i can use the stepper motor transfer function for this approach of controlling the speed using phase locked loop.