VECTOR CONTROL TECHNIQUE
The PMSM control is equivalent to that of the dc motor by a decoupling control known as field oriented control or vector control. The vector control separates the torque component of current and flux channels in the motor through its stator excitation. The vector control strategy is somewhat similar to that of the induction motor vector control, except for the following:
1. The slip frequency is zero because the machine always runs at synchronous speed.
2. The magnetizing current Ids =0 because the rotor flux is supplied by the PM.
3. The unit vector generated from an absolute position sensor because, the unlike slipping poles of an induction motor, the poles are fixed on the rotor.