The comparative study between different performance indices of a Permanent Magnet Synchronous Motor drive on variable sensor angle

In this paper the development of a model for self-controlled Permanent Magnet Synchronous Motor drive (PMSM) fed from a three phase voltage source bridge inverter which operates under self-control mode with the rotor position information is presented. The rotor position is monitored online via an absolute position encoder and this information is passed on to the inverter controller block for generating switching signals. It is found that with some settings of the position sensor, near-sinusoidal armature phase currents result, which therefore give rise to less torque ripple. The different performance indices of the system like electrical speed, electromagnetic torque, phase voltage, phase current and rotor position are modelled and subsequently simulated for different sensor angle with varying load. Results obtained through such process are compared and analyzed for optimization of sensor angle.