engineering recuitment MAHATRANSCO AE Electrical Mock Test Electrical Machines Three Phase Induction Motor
In constant V/F speed control of a 3-phase induction motor, if frequency is increased from low value to the rated value, the maximum torque (Tmax) and slip corresponding to the maximum torque (Sm) varies as
1
Tmax increases, Sm decreases
2
Tmax increases, Sm increases
3
Tmax constant, Sm decreases
4
Tmax constant, Sm increases
5
Tmax decreases, Sm increases