***show clear steps*** if two mechanically coupled (running at same speed) induction motor work at 50...
***show clear steps***
if two mechanically coupled (running at same speed) induction motor work at 50 Hz and 60 Hz respectively. The highest speed of machine is
A. 3600 rpm
B. 4000 rpm
C. 600 rpm
D. 500 rpm
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***show clear steps***
if two mechanically coupled (running at same speed) induction
motor work at 50...
Problem 5 (10 points A 3 phase induction machine is mechanically coupled to a dc shunt...
Problem 5 (10 points A 3 phase induction machine is mechanically coupled to a dc shunt machine. The rating and parameters of the machines are as follows: Induction machine 3 phase, 5 kVA, 208 V, 60 Hz, four-pole, 1746 rpm (equivalent circuit shown below) Air gap DC machine: (dc shunt machine shown below) 220 V, 5 kW, 1750 rpm R.-0.4 ?, Rf,-1000, Rfc-100? SW tw The induction machine is connected to a 3 phase, 208 V, 60 Hz supply, and...
SHOW ALL WORK The nameplate on a 460 Vi-i. 75hp, 50 Hz, 4 pole induction motor...
SHOW ALL WORK
The nameplate on a 460 Vi-i. 75hp, 50 Hz, 4 pole induction motor indicates that its rated load operators at a speed of 1450 RPM. Ifthe machine is operating at nted load find operating at rated load find (a) (b) (c) 10pts. The slip of the rotor. 10pts. The frequency of the rotor currents. 10pts. Angular velocity of the stator-produced MMF wave.
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....
Please show all steps with clear hand-writing. Final answers are provided in the bottom and must match with your answers...
Please show all steps with clear hand-writing. Final answers are
provided in the bottom and must match with your answers.
Consider a 7.5 kW, 2910 rpm three-phase 50Hz induction machine operating at rated voltage. (a) Calculate its synchronous speed in rpm and hence the rated slip speed in rpm. (b)The machine is running at no-load, calculate its operating speed in rpm (c) At what speed does rated output torque occur at? Calculate the rated output torque. (d) Calculate the rated...
4. A 50-kW, 460-V, 50-Hz, two-pole induction motor has a slip of 5 percent when operating...
4. A 50-kW, 460-V, 50-Hz, two-pole induction motor has a slip of 5 percent when operating a full-load conditions. At full-load conditions, the friction and windage losses are 700 W, and the core losses are 600 W. Find the following values for full-load conditions: (10 pts.) (a) The shaft speed in rpm (b) The output power in horse power (c) The load torque in lb-ft (d) The induced torque in lb-ft (e) The rotor frequency in hertz
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 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....
A 10 hp, 60 Hz, three-phase induction motor is delivering rated power while running at 864...
A 10 hp, 60 Hz, three-phase induction motor is delivering rated power while running at 864 rpm. The motor is drawing power from a 208 V, three-phase source. DC tests determine: R1 0.2 ? and R2-0.15 ?, we do not know XI and X2. Ignore XM. The rotational and core losses are 200 W and 100 W respectively. Find: a) The output (shaft torque). b) The number of poles. c) The input power and efficiency d) The power factor at...
The equivalent circuit of a 440 V, 3-phase, 8 pole, and 50 Hz star-connected induction motor (HELP)
Question: The equivalent circuit of a 440 V, 3-phase, 8 pole, and 50 Hz star-connected induction motor is shown in figure 1. The short-circuit test is conducted with a locked rotor and a line current of 80 A. The open-circuit test is conducted by supplying the stator winding at rated voltage and at the rotor is rotating freely without any mechanical load. Fig. 1 The per-phase equivalent circuit of a 3-phase induction motora) Determine the line voltage and power factor on the...
Equivalent circuit of 440V, 3-phase, 8 pole, 50 Hz star-connected induction motor
The equivalent circuit of a 440 V, 3-phase, 8 pole, and 50 Hz star-connected induction motor is shown in figure 1. The short-circuit test is conducted with a locked rotor and a line current of 80 A. The open-circuit test is conducted by supplying the stator winding at rated voltage and at the rotor is rotating freely without any mechanical load.a) Determine the line voltage and power factor on the short circuit test;b) We need to apply a low...
Problem 5 (10 points A 3 phase induction machine is mechanically coupled to a dc shunt machine. The rating and parameters of the machines are as follows: Induction machine 3 phase, 5 kVA, 208 V, 60 Hz, four-pole, 1746 rpm (equivalent circuit shown below) Air gap DC machine: (dc shunt machine shown below) 220 V, 5 kW, 1750 rpm R.-0.4 ?, Rf,-1000, Rfc-100? SW tw The induction machine is connected to a 3 phase, 208 V, 60 Hz supply, and...
SHOW ALL WORK
The nameplate on a 460 Vi-i. 75hp, 50 Hz, 4 pole induction motor indicates that its rated load operators at a speed of 1450 RPM. Ifthe machine is operating at nted load find operating at rated load find (a) (b) (c) 10pts. The slip of the rotor. 10pts. The frequency of the rotor currents. 10pts. Angular velocity of the stator-produced MMF wave.
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....
Please show all steps with clear hand-writing. Final answers are
provided in the bottom and must match with your answers.
Consider a 7.5 kW, 2910 rpm three-phase 50Hz induction machine operating at rated voltage. (a) Calculate its synchronous speed in rpm and hence the rated slip speed in rpm. (b)The machine is running at no-load, calculate its operating speed in rpm (c) At what speed does rated output torque occur at? Calculate the rated output torque. (d) Calculate the rated...
4. A 50-kW, 460-V, 50-Hz, two-pole induction motor has a slip of 5 percent when operating a full-load conditions. At full-load conditions, the friction and windage losses are 700 W, and the core losses are 600 W. Find the following values for full-load conditions: (10 pts.) (a) The shaft speed in rpm (b) The output power in horse power (c) The load torque in lb-ft (d) The induced torque in lb-ft (e) The rotor frequency in hertz
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...
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....
A 10 hp, 60 Hz, three-phase induction motor is delivering rated power while running at 864 rpm. The motor is drawing power from a 208 V, three-phase source. DC tests determine: R1 0.2 ? and R2-0.15 ?, we do not know XI and X2. Ignore XM. The rotational and core losses are 200 W and 100 W respectively. Find: a) The output (shaft torque). b) The number of poles. c) The input power and efficiency d) The power factor at...
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