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1. A six pole, 240V, 50 Hz three phase squirrel-cage induction motor has a no-load speed...
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....
6. A 3-phase 2.2 kV 25 Hz squirrel cage induction motor draws a line current of...
6. A 3-phase 2.2 kV 25 Hz squirrel cage induction motor draws a line current of 224 A and a total power of 777 kW when operating at full load. The full-load speed is 245 rpm. The stator is wye connected and has an effective resistance per phase of 0.125 Ω. The stator iron (core) loss is 8.88 kW; friction and windage losses are 4.54 kW. Calculate at full-load conditions: b. power supplied to the rotor, a. the power factor;...
A 50-KW, 220V, 50 Hz, squirrel-cage three-phase induction motor is needed to rotate a mine conveyor...
A 50-KW, 220V, 50 Hz, squirrel-cage three-phase induction motor is needed to rotate a mine conveyor belt drive. The motor starts sometimes under load, but most of the time is needed to run at rated speed and slip of 3.5%. (a) Propose an appropriate design of this drive motor in order to suit the application. Motivate and then illustrate your design with suitable drawings and speed (slip)-torque graphs. [12] (b) If the supply voltage of the motor in (a) above...
Please show detailed work and write clearly. Thank you. 6. A four-pole squirrel-cage motor has the...
Please show detailed work and write clearly. Thank you.
6. A four-pole squirrel-cage motor has the following characteristics: Power input at a rated load is 5200 W with a power factor of 0.70. Rated speed is 1150 rpm. Resistance of each stator windings (there are three) is Rs-: 0.195 Ω. . The motor is supplied by a three-phase source with a line-to-line voltage of 460 V and a frequency of 50 Hz. The windings of the motor have a Y-connection....
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when...
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when it operates at rated load. Calculate the following 1. Number of poles of the machine. 2. slip at full load. 3. Rotor frequency. 4. speed of rotor field with respect to the stator. 5. speed of the rotor magnetic field with respect to the stator magnetic rotating field.
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...
Consider a three-phase squirrel cage motor powered at 220 V / 60 Hz. It is known...
Consider a three-phase squirrel cage motor powered at 220 V / 60 Hz. It is known that at full load the power demanded from the network is 20,800 W, the line current is 64 A, and the speed is 830 rpm. The engine was designed to deliver a power of 25 HP. Calculate at full load: a) The number of poles, if it is known that the no load speed is 895 rpm b) Synchronous speed c) Slip d) FP...
A 4-pole, 60 hz, 3-phase induction motor has a blocked rotor reactance per phase that is...
A 4-pole, 60 hz, 3-phase induction motor has a blocked rotor reactance per phase that is four times the rotor resistance per phase. At what speed will the motor develop maximum torque? 1200 rpm 1500 rpm 1350 rpm 1620 rpm What is the ratio of maximum to full load torque in a motor having slip of 4% at full load and 20% at maximum torque? 15 3 2.6 5.2 If a motor has a slip of 2% at rated voltage,...
A 240-V, 20hp, four poles, 50 Hz, Y-connected induction motor has a full-load slip of 2...
A 240-V, 20hp, four poles, 50 Hz, Y-connected induction motor has a full-load slip of 2 percent. What is the rotor speed of this motor at rated load? 1470 rpm 1420 rpm 1500 rpm 1400 rpm
5 Marks) A 4-pole, 3 phase, 50 Hz, 230 V induction motor. Each phase of rotor winding b) has one-fourth the number of t...
5 Marks) A 4-pole, 3 phase, 50 Hz, 230 V induction motor. Each phase of rotor winding b) has one-fourth the number of turns of each stator. The full-load speed is 1,455 rpm. The rotor resistance is 0.3 Ω and rotor standstill reactance is 1.0 Ω per phase. The rotor and stator windings are similar. Stator losses are equal to 50 Watts. Friction and windage losses are equal to 30 W. Calculate ) Blocked rotor voltage per phase. 2 Marks)...
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....
6. A 3-phase 2.2 kV 25 Hz squirrel cage induction motor draws a line current of 224 A and a total power of 777 kW when operating at full load. The full-load speed is 245 rpm. The stator is wye connected and has an effective resistance per phase of 0.125 Ω. The stator iron (core) loss is 8.88 kW; friction and windage losses are 4.54 kW. Calculate at full-load conditions: b. power supplied to the rotor, a. the power factor;...
Please show detailed work and write clearly. Thank you.
6. A four-pole squirrel-cage motor has the following characteristics: Power input at a rated load is 5200 W with a power factor of 0.70. Rated speed is 1150 rpm. Resistance of each stator windings (there are three) is Rs-: 0.195 Ω. . The motor is supplied by a three-phase source with a line-to-line voltage of 460 V and a frequency of 50 Hz. The windings of the motor have a Y-connection....
1. A three phase, 60 Hz, 100-hp, 440V, Y-connected induction motor runs at 864 rpm when it operates at rated load. Calculate the following 1. Number of poles of the machine. 2. slip at full load. 3. Rotor frequency. 4. speed of rotor field with respect to the stator. 5. speed of the rotor magnetic field with respect to the stator magnetic rotating field.
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 240-V, 20hp, four poles, 50 Hz, Y-connected induction motor has a full-load slip of 2 percent. What is the rotor speed of this motor at rated load? 1470 rpm 1420 rpm 1500 rpm 1400 rpm
5 Marks) A 4-pole, 3 phase, 50 Hz, 230 V induction motor. Each phase of rotor winding b) has one-fourth the number of turns of each stator. The full-load speed is 1,455 rpm. The rotor resistance is 0.3 Ω and rotor standstill reactance is 1.0 Ω per phase. The rotor and stator windings are similar. Stator losses are equal to 50 Watts. Friction and windage losses are equal to 30 W. Calculate ) Blocked rotor voltage per phase. 2 Marks)...
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