1 Answers
- Obtain Speed feedback, compare with reference speed ωr*.
- Process Speed error through a speed PI controller to obtain reference torque value Te*.
- Feedback stator voltage and currents in stationary reference frame.
- Estimate Stator flux phasor magnitude (Ψs or λs) and angle (θs).
- Estimate Electromagnetic Torque (Te)
- Obtain error in stator flux, pass it through two level hysteresis controller to get dΨs.
- Obtain error in electromagnetic torque, pass it through three level hysteresis controller to get dTe.
- Obtain sector number (N) based on θs
- Pass the flux, torque controller output and sector information (dΨs, dTe, N) through vector selection table to obtain the suitable switching signal for the VSI (Sa, Sb, Sc).