Question

A 4-pole, 30 Hz 3 phase induction motor has a rotor resistance of 0.21 ohm per phase and standstill reactance of 0.7 ohm per phase. The speed at which maximum torque is developed

• A. 1500rpm
• B. 3000rpm
• C. 1455rpm
• D. 1460rpm

Answer 1

Answer:

C. 1455rpm