A 460V, 25hp, 60Hz, 4 pole, Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit:  R1 = 0.641 Ω         R2 = 0.332 Ω  X1 = 1.106 Ω         X2 = 0.436 Ω          Xm = 26.3 Ω  The total rotational losses are 1100W and are assumed to be constant. The core loss is lumped in with the rotational losses. For a rotor slip of 3.5% at the rated voltage and rated frequency, find the motor’s Speed Stator current Power factor Pconv and Pout Ʈǐnd and Ʈload Efficiency

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Q: If a 4-pole induction motor has a synchronous speed of 1500 r.p.m., then, supply frequency is

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A: Step 1:

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Three Phase Induction Motor

The induction motor is an electric motor that runs on AC (alternating current) and it is of two type single phase motor that work on single-phase power supply and three-phase motor that work on three-phase power supply.