Blocked rotor test on three phase induction motor
A 3-phase, star-connected SRIM is fed from 400 V, 50 Hz source. Stator to rotor effective turns ratio is 2. At a rotor speed of 1440 rpm, the rotor induced emf per phase would be
When the supply voltage to a 3-phase SCIM is reduced by 20%, the maximum torque will decrease by
Starting torque of a 3-phase IM varies as
Maximum torque in a 3-phase IM varies as