I have an induction motor running from line voltage of 460 VAC in the United States...
I have an induction motor running from line voltage of 460 VAC in the United States at 1800 rpm. How many poles does the motor have?
Answers:
2 poles
4 poles
6 poles
I don’t have enough information
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I have an induction motor running from line voltage of 460 VAC
in the United States...
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....
show all work 1. a transformer is connected to a 460 VAC line. The secondary voltage...
show all work 1. a transformer is connected to a 460 VAC line. The secondary voltage is 230VAC. The load connected to the secondary voltage draws 30A. a. what is the turns ratio of the transformer? b. How much current flows in the primary circuit? 2. You find that under unusually heavy loads, the voltage in your plant drops to 456 V. What will be the resulting secondary voltage if you use a transformer with a 4:1 primary to secondary...
(8). 3 phase Y connected induction motor has line to line voltage of 600 V, r1...
(8). 3 phase Y connected induction motor has line to line voltage of 600 V, r1 = r = 0.75, x1 = x= 2, 4 poles Find Smax. Find Tзфтах (9). If ris changed to 0.822 a) Tmax becomes greater b) Tmax becomes less c) Tmax becomes constant
A. A three-phase ac induction motor drives a mechanical load. The motor's terminal voltage is 470V,...
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...
44. The direction of rotation of an induction motor depends on a. the frequency of the...
44. The direction of rotation of an induction motor depends on a. the frequency of the input voltage b. the strength of the magnetic field set up c. the phase sequence of the input supply lines and order in which they are connected to the stator windings d. whether the windings are connected in delta or star determines the speed of the rotating magnetic field a. the number of poles in the motor b. the frequency of the supply d...
A 3-phase, 460 V, 1740 rpm, 60 Hz, 4-pole wound-rotor induction motor has the following parameters...
A 3-phase, 460 V, 1740 rpm, 60 Hz, 4-pole wound-rotor induction motor has the following parameters per phase: R1 = 0.25 Ω, ' 2R = 0.2Ω, ' 1 2 X = X = 0.5Ω, 30 m X = Ω. The rotational losses are 1700 W. With the rotor terminals short-circuited, find: 1. at starting: • current when started direct on full voltage, • a torque 2. at full load: • slip • current • ratio of starting current to full-load...
A 460-V, three-phase, 4-pole induction motor is known to have the following single-phase equivalent-circuit parameters in ohms-per-phase Y R 19.7 x 10-3 Xi=0.129 X2 0.187 Xm 13.9 The motor is observe...
A 460-V, three-phase, 4-pole induction motor is known to have the following single-phase equivalent-circuit parameters in ohms-per-phase Y R 19.7 x 10-3 Xi=0.129 X2 0.187 Xm 13.9 The motor is observed to be operating at a terminal voltage of 450 V, line-line with an output power of 95 kW at a speed of 1780.7 r/min. Calculate the single-phase equivalent-circuit rotor resistance R2 assuming that the motor core loss is 1200 W and the friction and windage loss is 700 W....
3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all...
3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all pages. Consider the following induction machine THREE-PHASE INDUCTION MOTOR DATA* Ratings Line Voltage 2400 V; 72.17 A; Horsepower-300 hp stator frequency60 Hz Design W Poles -4; **Equivalent Circuit Values (in stator ohms Rated Freq)** R1 0.30000 R2'- 0.47159 X2'-1.73000; Jm2.5000 kg-m sq Thevenin Equivalent Circuit Values: RT-0.28524; slip, speed for max Torque0.1375; Rotational Loss Torque-TRL 0.18689 x (speed in rad/s) Nm X1 -1.73000 Xm67.740...
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...
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks)...
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks) (ii) If a six-pole induction motor supplied by a three-phase 50 Hz supply has a rotor frequency of 2.3 Hz, Calculate: (a)The percentage slip (b)The speed of the rotor in rpm (4 Marks) (iii)Draw a typical torque versus slip characteristic curve of an induction motor. If rotor resistance is increased show how the new torque versus slip curve deviates from the original one. (4...
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....
(8). 3 phase Y connected induction motor has line to line voltage of 600 V, r1 = r = 0.75, x1 = x= 2, 4 poles Find Smax. Find Tзфтах (9). If ris changed to 0.822 a) Tmax becomes greater b) Tmax becomes less c) Tmax becomes constant
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...
44. The direction of rotation of an induction motor depends on a. the frequency of the input voltage b. the strength of the magnetic field set up c. the phase sequence of the input supply lines and order in which they are connected to the stator windings d. whether the windings are connected in delta or star determines the speed of the rotating magnetic field a. the number of poles in the motor b. the frequency of the supply d...
A 460-V, three-phase, 4-pole induction motor is known to have the following single-phase equivalent-circuit parameters in ohms-per-phase Y R 19.7 x 10-3 Xi=0.129 X2 0.187 Xm 13.9 The motor is observed to be operating at a terminal voltage of 450 V, line-line with an output power of 95 kW at a speed of 1780.7 r/min. Calculate the single-phase equivalent-circuit rotor resistance R2 assuming that the motor core loss is 1200 W and the friction and windage loss is 700 W....
3ELEC 3600. Problem H8 3-phase Wound Rotor Induction Motor This sheet is page 1. Number all pages. Consider the following induction machine THREE-PHASE INDUCTION MOTOR DATA* Ratings Line Voltage 2400 V; 72.17 A; Horsepower-300 hp stator frequency60 Hz Design W Poles -4; **Equivalent Circuit Values (in stator ohms Rated Freq)** R1 0.30000 R2'- 0.47159 X2'-1.73000; Jm2.5000 kg-m sq Thevenin Equivalent Circuit Values: RT-0.28524; slip, speed for max Torque0.1375; Rotational Loss Torque-TRL 0.18689 x (speed in rad/s) Nm X1 -1.73000 Xm67.740...
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...
(b) (i) Explain briefly why an induction motor can never run at synchronous speed? (2 Marks) (ii) If a six-pole induction motor supplied by a three-phase 50 Hz supply has a rotor frequency of 2.3 Hz, Calculate: (a)The percentage slip (b)The speed of the rotor in rpm (4 Marks) (iii)Draw a typical torque versus slip characteristic curve of an induction motor. If rotor resistance is increased show how the new torque versus slip curve deviates from the original one. (4...
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