A 227-V three-phase motor runs 1,650 rpm at a load requiring 11 N-m torque. The motor draws 9.5 A of current and the power factor is 0.94, lagging. Determine the power loss (in W) in the motor. (Enter your answer as a number without the units.)
A 227-V three-phase motor runs 1,650 rpm at a load requiring 11 N-m torque. The motor...
A 208-V three-phase motor runs 1,770 rpm at a load requiring 5 N-m torque. The motor draws 6.5 A of current and the power factor is 0.88, lagging. Determine the power loss (in W) in the motor. (Enter your answer as a number without the units.)
6. [Induction Motor - 15 points] A three-phase, 460 V, 60 Hz, 26.8 hp, 4-pole, Y-connected induction motor draws 25 A at a power factor of 0.9 lagging. The core loss is 900 W, stator copper loss is 1100 W, friction and windage loss is 300 W, and stray loss is neglected. The machine shaft rotates at a speed of 1738 rpm. Calculate the air gap power and output load torque.
A 4 phase, 460 V, 60 Hz, 26.8 hp, 4 pole, Y-connected induction motor draws 25 A at a power factor of 0.9 lagging. Core loss is 900 W, stator copper loss is 1100W, friction and winding losses are 300 W, and stray loss is neglected. The machine shaft rotates at 1738 rpm. Calculate the air gap power and output load torque - [Induction Motor - 15 points) A three-phase, 460 V, 60 Hz, 26.8 hp, 4-pole, Y-connected induction motor...
A 220 V shunt motor runs at 1500 rpm at no load current of 3A. What will be its full load speed and output torque if it draws 30 A at full load. The shunt and armature resistances are 600 and 0.33 respectively 3.
A three phase, 60 Hz induction motor rated at 440 V and 40 hp drives a load at 1710 rpm. The induction motor has the following impedances referred to the stator in /phase: R,=0.1512, X,=0.7512; R2=1.222,X=0.7522; X=25 12 . The core loss is 450 W and friction and windage loss is 250 W. Calculate the following 1. line current and power factor 2. Real and reactive input power 3. Air-gap power 4. Mechanical power and torque developed 5. shaft horse...
4.6. A 460-V, 75 kW, 4-pole, delta-connected, 60-Hz, three- phase induction motor has a full-load slip of 5 percent, an efficiency of 92 percent and a power-factor of 0.87 lagging at full-load. At start-up, the motor develops 1.9 times the full load developed torque but draws 7.5 times the rated current at the rated voltage. This motor is to be started with an auto- transformer reduced-voltage starter. Assume the stator resistance and the stator core loss to be negligible. Calculate...
A 1.6-hp, 8-pole, 60-Hz, three-phase induction motor is rated for 820 rpm, 220 V rms (line-to-line), and 4.32 A (line current) at 77.0 percent lagging power factor. Find the full-load efficiency if the motor is delta-connected and if it is wye-connected.
A 250-V shunt-connected DC motor runs at 1500 rpm when it is not connected to any external load. When the motor is connected to an external load, it draws a line current of 40A. The motor has an armature resistance of 1 ? and a field circuit resistance of 100 ?. Assume that the rotational loss torque is 2 Nm and is independent of the speed (a) Find the line current of the motor when there is no external load....
A. A three-phase ac induction motor drives a mechanical load. The motor's terminal voltage is 470V, 60 Hz. The motor's line current is 175 A, and the power factor is 0.85 lagging The motor's output power is 140 hp and the motor rotates at a speed of 1735 rpm. The motor's copper and core losses total 8.5 kW combined 1. Determine the number of poles of this motor 2. Determine the motor's shaft torque (N-m). 3. Determine the motor's rotational...
QUESTION 8 The speed-torque characteristic of an induction motor has been empirically determined as follows: Speed 147 440 41 1.3001.100 Torque 3 Speed 900 750 350 rev/min Torque 13 11 75 N-m 6 9 15 13 The motor will drive a load requiring a starting torque of 7 N-m and increase linearly with speed to 13 N-m at 1,500 rev/min. Find the steady-state operating point of the motor. Enter the one best answer (as a number without the units) from...