Question

An AC induction motor is rated with 4% slip and 3600 RPM synchronous speed Ns. What is the rotor speed Nr in RPM? (Type in an integer.)

Answer 1

Answer:

Nr = 3456 rpm

Explanation:

In AC induction motors, the formula for slip is given as;

slip = (Ns - Nr) / Ns x

where Ns is the synchronous speed of the motor, and Nr is the rotor speed of the motor

Now as per information given in question statement, we have

Slip = 4

Ns = 3600

Putting the values in formula;

4 = ( 3600 - Nr) / 3600 x 100

4 x 36 = 3600 - Nr

144 = 3600 - Nr

Nr = 3600 - 144

Nr = 3456 rpm

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