Problem 11: Operating Characteristics of an AC Permanent Magnet Synchronous Motor, PMSM The following figure shows the b

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Problem 11 Operating Characteristics Of An Ac Permanent Magnet Synchronous Motor Pmsm The Following Figure Shows The B 1 (261.8 KiB) Viewed 42 times

Problem 11: Operating Characteristics of an AC Permanent Magnet Synchronous Motor, PMSM The following figure shows the back EMF of phase winding at open terminal of a PMSM running at nominal speed of 6000 rpm. Some motor characteristics are: - Number of motor poles = 4 - Rated current = 38 A - Ld= 1,2 mH; Lq= 2,3 mH Vs (V) 200 100 . wwwww -200 -300 005 003 O. t(sg) 1. Estimate the magnet flux, YPM (note that usually parameter Ypm includes constant k in the general expression Eback-EMF = Mek YPM, so it can be said that Eback.EME = 0 Y PM) Assuming the motor is running at 6000rpm, with Id=-6,6 A ; 19=37,5 A. 2. Construct a voltage-vector diagram for the lossless model 3. Calculate torque 4. Calculate power factor 5. Assuming now the control applied it is MTPA, which will be the motor torque? 6. And in the same MTPA conditions, which is the stator voltage, Vs? 7. Construct the voltage-vector diagram of the motor for this condition of MTPA, assuming a lossless model. 8. Determine the motor torque when the motor is running at 7500 rpm