Performance analysis of PMSM motor drive.

Q1. What happens to the torque when a PMSM operates beyond its base speed?

A) Torque increases
B) Torque remains constant
C) Torque decreases due to field weakening
D) Torque becomes zero

Q2. Which waveform characteristic indicates balanced PMSM operation?

A) Square-shaped voltage waveforms
B) Sinusoidal phase currents with equal amplitude and 120° phase shift
C) Sharp spikes in torque waveform
D) Zero stator current

Q3. What does a fast dynamic response of a PMSM indicate in performance analysis?

A) High overshoot
B) Delayed start
C) Quick tracking of speed reference
D) Reduced voltage supply

Q4. What parameter is typically observed to determine the efficiency of a PMSM drive?

A) Motor temperature
B) Ratio of mechanical power output to electrical power input
C) Inverter switching frequency
D) Speed ripple

Q5. Which of the following is NOT a performance metric of PMSM drive analysis?

A)Speed vs. Time
B) Torque vs. Speed
C) Frequency vs. Capacitance
D) Efficiency vs. Load