Non-model based sensorless vector control of permanent magnet synchronous motor

For the control of a permanent magnet synchronous motor (PMSM) such as the vector control and the direct torque control, the rotor position is required to perform commutations between phases and to control speed and torque too. The sensorless control is popular for several reasons: cost saving, system reliability, etc. The paper presents a non-model based method for the sensorless vector control of the permanent magnet synchronous motor which employs an injection of high frequency voltages for rotor position estimation. This method works just only if the permanent magnet synchronous motor contain magnetic saliency. The saliency will be discussed too. The simulation of these methods, with a view to saturation saliency, is very difficult task. However, for testing of these methods and an initial tuning of the overall drive will showed some simulation results only with a small geometrical saliency.