Which outcome occurs when a synchronous reluctance motor driven beyond its stable torque range in a closed-loop vector control circuit?

A)Commutation failure and increased THD

B)Resonant oscillation and instability✓

C)Over-voltage and insulation breakdown

D)Torque saturation and reduced efficiency

💡 Explanation

Resonant oscillation and instability occurs because exceeding the torque limit in field-oriented control triggers a **negative damping** effect within the drive loop. Therefore, oscillations increase, rather than the expected stability, due to current limitations hindering perfect torque control.

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Which outcome occurs when a synchronous reluctance motor driven beyond its stable torque range in a closed-loop vector control circuit?

💡 Explanation

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