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(c) A 6-pole delta-connected cage induction machine is rated at 30kW, 48A, 970rpm. On no-load the...
A two-pole, 75kW, 440 V, 50 Hz, Y-connected, three-phase squirrel cage induction motor has the fo...
Please solve this question. Thank you.
A two-pole, 75kW, 440 V, 50 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters, in Ω/phase referred to the stator: R1-0.075, XI 0.17, xm-72, R2-0.065 and X-0.17. Its rated slip is 4%. Assume that the mechanical losses are 1 kW and the core losses are 1.1 kW. Compute: a. The rated input current b. The rated power factor. c. The pullout torque d. The induced and load torques at rated conditions....
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 st...
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...
For a 6-pole, 2-phase squirrel-cage induction machine, the following parameters are given: 10, .is . Žml,...
For a 6-pole, 2-phase squirrel-cage induction machine, the following parameters are given: 10, .is . Žml, .mas : 1 BrnII,? 0.5?, l?r 1mil The induction machine works as a motor being supplied by a 60-Hz source. The rotor speed is ar360 rads In his ip of operaion, s1A1. A; 25.1/1/1.9° A, calculate the following (i) Electromagnetic torque (6') (ii) Rotor copper loss due to the rotor winding resistance (5') (ii) Mechanical power delivered to the load. (6') Determine Vas, las,...
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955...
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955 rpm and rated torque of 35 Nm. This motor drives a load with a torque characteristic that increases linearly with speed such that it equals the load torque at the rated speed. It draws a current of 2.1 A(rms) per phase at the rated voltage at a power factor of 0.81 (lagging). The stator resistance Rs = 2.0 ohms. At the rated operating speed,...
Consider a 2-pole, 3-phase induction machine, with a rated frequency of 60Hz, producing the rated torque...
Consider a 2-pole, 3-phase induction machine, with a rated frequency of 60Hz, producing the rated torque at slip s= 3.0percent, when supplied with rated voltages. Under the rated torque condition, calculate the rotor speed wm in rad/s.
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has t...
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has the following parameters per phase refereed to the stator. RI : 0.29 Ω , R2 0. 14 Ω , Xi-0.50 Ω , X2-0.20 Ω , Xm-1 0.53 Ω The total windage and core losses can be assumed to be a constant 350 W. If the machine is operating at rated voltage and frequency with a 5.5% slip, find the steady-state: (a) 10pts. Mechanical...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the ...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters in Ω/phase referred to the stator: R,-0.220, Xi = 0.430, X,-15.0, R2 0.130 and X2-0.430. Mechanical and core losses amount to 300 W and 200 W respectively for rated voltage. (a) The motor is fed with a 60 Hz, 208 V voltage. It runs with a slip of 4.5 %. Find the speed, shaft torque and power, efficiency and power...
A three-phase, 50-Hz, 4-pole, 575-V (line-line, rms) induction motor drive has a full-load (rated) speed of...
A three-phase, 50-Hz, 4-pole, 575-V (line-line, rms) induction motor drive has a full-load (rated) speed of 1450 rpm. The rated torque is 50 Nm. Keeping the air gap flux-density peak constant at its rated value, (a) plot the torque-speed characteristics (the linear portion) for the following values of the frequency: 50 Hz, 40 Hz, 30 Hz and 20 Hz. (b) This motor is supplying a load whose torque demand increases linearly with speed such that it equals the rated motor...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed of 103 rad/s and a speed regulation of 5% at rated load. Find the amount of slip (in rpm) at full load for this motor. 2.. A 2 HP, 240 VAC, 60 Hz, capacitor-start motor is 75% efficient and draws 10 A at full load. What is this motor's power factor at rated load? 3. A wound rotor, 3 phase induction motor in Mr....
how do we calculate ii and iii) - induction motor (25 marks) QUESTION 3 A three-phase,...
how do we calculate ii and iii) - induction motor
(25 marks) QUESTION 3 A three-phase, 400 V, 50 Hz, 4-pole, 1370 rpm, star connected, squirrei-cage induction motor has the following parameters: R, 20, R2- 3 Q, X1-X2- 3.5 and Xm=40 .Motor is controlled by a voltage source inverter at constant V/f ratio. By using IEEE equivalent circuit; Calculate the starting torque and starting current at 10 Hz To- If the torque-speed to be a straight line calculate the slip...
Please solve this question. Thank you.
A two-pole, 75kW, 440 V, 50 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters, in Ω/phase referred to the stator: R1-0.075, XI 0.17, xm-72, R2-0.065 and X-0.17. Its rated slip is 4%. Assume that the mechanical losses are 1 kW and the core losses are 1.1 kW. Compute: a. The rated input current b. The rated power factor. c. The pullout torque d. The induced and load torques at rated conditions....
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...
For a 6-pole, 2-phase squirrel-cage induction machine, the following parameters are given: 10, .is . Žml, .mas : 1 BrnII,? 0.5?, l?r 1mil The induction machine works as a motor being supplied by a 60-Hz source. The rotor speed is ar360 rads In his ip of operaion, s1A1. A; 25.1/1/1.9° A, calculate the following (i) Electromagnetic torque (6') (ii) Rotor copper loss due to the rotor winding resistance (5') (ii) Mechanical power delivered to the load. (6') Determine Vas, las,...
Consider a 2-pole, 3-phase induction machine, with a rated frequency of 60Hz, producing the rated torque at slip s= 3.0percent, when supplied with rated voltages. Under the rated torque condition, calculate the rotor speed wm in rad/s.
A three-phase 4 pole wye connected 220 V, 15 Hp, 50 Hz induction machine (rated conditions) has the following parameters per phase refereed to the stator. RI : 0.29 Ω , R2 0. 14 Ω , Xi-0.50 Ω , X2-0.20 Ω , Xm-1 0.53 Ω The total windage and core losses can be assumed to be a constant 350 W. If the machine is operating at rated voltage and frequency with a 5.5% slip, find the steady-state: (a) 10pts. Mechanical...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters in Ω/phase referred to the stator: R,-0.220, Xi = 0.430, X,-15.0, R2 0.130 and X2-0.430. Mechanical and core losses amount to 300 W and 200 W respectively for rated voltage. (a) The motor is fed with a 60 Hz, 208 V voltage. It runs with a slip of 4.5 %. Find the speed, shaft torque and power, efficiency and power...
1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed of 103 rad/s and a speed regulation of 5% at rated load. Find the amount of slip (in rpm) at full load for this motor. 2.. A 2 HP, 240 VAC, 60 Hz, capacitor-start motor is 75% efficient and draws 10 A at full load. What is this motor's power factor at rated load? 3. A wound rotor, 3 phase induction motor in Mr....
how do we calculate ii and iii) - induction motor
(25 marks) QUESTION 3 A three-phase, 400 V, 50 Hz, 4-pole, 1370 rpm, star connected, squirrei-cage induction motor has the following parameters: R, 20, R2- 3 Q, X1-X2- 3.5 and Xm=40 .Motor is controlled by a voltage source inverter at constant V/f ratio. By using IEEE equivalent circuit; Calculate the starting torque and starting current at 10 Hz To- If the torque-speed to be a straight line calculate the slip...
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