Question

727. A 3-phase induction motor is driving a constant torque load of
I pu at 5% slip. It has a maximum torque of 2 pu at 10% slip . Torque-speed variation in stable zone is assumed to be linear. For
stable operation of the motor, the minimum per unit supply
voltage is approximately

(a) 0.25 (b) 0.50 (c) 0.707 (d) 0.80
a​

Answer 1

Answer:

a 3-phase induction motor is driving a constant torque load of ...

at 5% slip. it has a maximum torque of 2 pu at 10% slip. torque-speed variation in stable zone is assumed to be linear. for the stable operation of the motor, the ...

1 answer

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Answer 2

Answer:

Explanation:

at constant load,slip is inversely proportional to supply voltage.

so,s1/s2=(v2/v1)^2

(5/10)^1/2*v1=v2

v2=0.707v1