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1 a Determine the synchronous speed of a motor that has a frequency of 60Hz and...
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 4-Pole, 3Ø induction motor operates from a supply whose frequency is 60Hz. a.)Calculate the speed...
A 4-Pole, 3Ø induction motor operates from a supply whose frequency is 60Hz. a.)Calculate the speed at which the magnetic field of the stator is rotating b.) What is the speed of the rotor when the slip of 0.05 Thank you in advance!!
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....
Problem Solving: 1. A 220V, 4-pole, 60Hz, 1-phase induction motor has an effective rotor resistance and...
Problem Solving: 1. A 220V, 4-pole, 60Hz, 1-phase induction motor has an effective rotor resistance and leakage reactance of 0.5 Ohms and 5 ohms respectively. It is running at a speed of 1,800 rpm. Determine: a. Frequencies of forward and backward rotor current components b. Relative magnitudes of forward and backward fluxes. Neglect magnetizing current and stator impedance. A 220-W, 2-pole, 115-V, 60-Hz single-phase induction motor delivers rated output at a slip 10%. The total copper loss at full load...
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.
A three phase 10-pole synchronous motor has per phase synchronous resistance of 4.3 ohm. It is...
A three phase 10-pole synchronous motor has per phase synchronous resistance of 4.3 ohm. It is connected to a 4160V (line to line) 60Hz line and generates an excitation voltage Eo of 1790V (line to neutral) when the dc exciting current is 30A. The Torque angle between E and Eo is 30 degrees. Calculate a) The mechanical angle between the center of rotor and stator poles b) The voltage across the synchronous reactance c) The power delivered to the motor...
A 230 V, 50 Hz, three-phase, Y-connected, 6-pole induction motor has the following per-phase parameters R-0.07...
A 230 V, 50 Hz, three-phase, Y-connected, 6-pole induction motor has the following per-phase parameters R-0.07 Ro 00 0.08 Ω x, x, 0.3 xm 6.33 At a slip of 2%, determine the followings using approximate equivalent circuit of the motor i) The motor speed in rev/min and rad/s. ii) The rotor current. ii) The stator current. iv) The induced torque. v) The efficiency of the motor.
Need detailed answer, big thanks! 2. A three-phase A-connected, 50 Hz, 400 V, 4 poles, induction...
Need detailed answer, big thanks!
2. A three-phase A-connected, 50 Hz, 400 V, 4 poles, induction motor has the following parameters for the exact equivalent circuit (per phase): R, 0.7 Q; x 1.4 Q; x 1.2 ; xy 50 -1600 ; R 0.54 2. The rotational loss is 300 W at rated current. The motor is supplied by an 8-pole synchronous generator, Y-connected, with a synchronous reactance of x 1.5 (per phase). The motor is operating at rated frequency, rated...
(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...
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...
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....
Problem Solving: 1. A 220V, 4-pole, 60Hz, 1-phase induction motor has an effective rotor resistance and leakage reactance of 0.5 Ohms and 5 ohms respectively. It is running at a speed of 1,800 rpm. Determine: a. Frequencies of forward and backward rotor current components b. Relative magnitudes of forward and backward fluxes. Neglect magnetizing current and stator impedance. A 220-W, 2-pole, 115-V, 60-Hz single-phase induction motor delivers rated output at a slip 10%. The total copper loss at full load...
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.
A 230 V, 50 Hz, three-phase, Y-connected, 6-pole induction motor has the following per-phase parameters R-0.07 Ro 00 0.08 Ω x, x, 0.3 xm 6.33 At a slip of 2%, determine the followings using approximate equivalent circuit of the motor i) The motor speed in rev/min and rad/s. ii) The rotor current. ii) The stator current. iv) The induced torque. v) The efficiency of the motor.
Need detailed answer, big thanks!
2. A three-phase A-connected, 50 Hz, 400 V, 4 poles, induction motor has the following parameters for the exact equivalent circuit (per phase): R, 0.7 Q; x 1.4 Q; x 1.2 ; xy 50 -1600 ; R 0.54 2. The rotational loss is 300 W at rated current. The motor is supplied by an 8-pole synchronous generator, Y-connected, with a synchronous reactance of x 1.5 (per phase). The motor is operating at rated frequency, rated...
(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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