The shaft load on a 40-hp, 60-Hz, 460-V, four-pole induction motor is such as to cause the machine to operate at 1447 r/min. The stray load, loss and combined windage and friction loss when operating at this load, are 450 W and 220 W, respectively. The motor parameters in ohms/phase are R1 = 0.1418 Rz = 1.10 XM = 21.27 X1 = 0.7273 X2 = 0.7284 Rfe = 212.73 The motor is NEMA design D and wye connected. Determine (a) motor input impedance per phase; (b) line current, (c) active, reactive, and apparent power and power factor, (d) equiva lent rotor current, (e) stator copper loss, (f) rotor copper loss, (g) core loss: (h) air-gap power, (1) mechanical power developed, () developed torque; (k) shaft horsepower, (1) shaft torque; (m) efficiency. (n) Sketch the power-flow diagram and enter all data. (O) If the speed at rated load is I 190 r/min, determine the expected minimum locked-rotor torque.

Q: -Phase 50Hz 6 pole induction motor has rotor resistance of 0.1 ohm and reactance of 0.92. ignore…

A:

Q: A three-phase, four-pole, 208 V, 60 Hz, Y-connected, induction motor has the following parameters,…

A: Given data : 208 v , 60 hz R1 =0.22 X1=0.43Xm = 15 Rc=∞P = 4 R2=0.127X2=0.43Solution (a)rms value of…

Q: In an Induction motor, if the load is decreased, what happens to the power factor?Select one:a.…

A: When the load on an induction motor decreases, the motor draws less real power but still requires a…

Single Phase Induction Motor

The single-phase induction motor or engine consists of a single rotating phase in the stator and a rotating cage in the rotor. When phase one supply is connected to the stator winding, a magnetic field is generated. In the pulsating field, the rotor does not rotate due to inertia. So, a single-phase import motor does not start and requires some initial methods.