Homework Answers
Add Answer to:
A 240-V, 20hp, four poles, 50 Hz, Y-connected induction motor has a full-load slip of 2...
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....
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.
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full...
4. A certain four-pole 240-V-rms 50-Hz delta-connected three-phase induction motor operates at slip 5% at full load and has rotational losses (windage + friction) of 100 W. The stator resistance per phase is 0.2 Ohm. The results of no-load and locked-rotor tests on this motor are as follows: No-load test Locked-rotor test Line-to-line input voltage: 240 V 45 V Input active power: 1100 W 1300 W Input line current: 10 A 30 A Using the tests data, determine parameters of...
A four-pole Y-connected, 415 V, 50 Hz, induction motor has phase equivalent circuit parameters of R1=...
A four-pole Y-connected, 415 V, 50 Hz, induction motor has phase equivalent circuit parameters of R1= 2 ohms. R2=2.2 ohms. X1=X2=4 ohms. X(motor)=90 ohms Under rated condition, the rotor slip is 6%. (i) What is the rotor speed and rotor electrical frequency under the rated conditions; (ii) Calculate the stator input current, power factor, and electromagnetic torque under these conditions; (iii) The machine is running at rated conditions and it is to be stopped by switching the two stator leads....
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
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...
A 240 V, 50 Hz, six-pole Y-connected, 18 kW, induction motor is tested in the laboratory,...
A 240 V, 50 Hz, six-pole Y-connected, 18 kW, induction motor is tested in the laboratory, with the following results: No load test: Terminal voltage: 240 V, phase current: 6.0 A, AC supply frequency: 50 Hz Locked rotor: Terminal voltage: 36 V, phase current: 8.5 A, input active power: 235 W, AC supply frequency: 50 Hz DC test: DC voltage: 13.5 V, DC current: 10.5 A Find the equivalent circuit parameters of this 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...
Asynchronous slip-ring motor with 50 Hz frequency, 380/220 V with full load values Pn = 50...
Asynchronous slip-ring motor with 50 Hz frequency, 380/220 V with full load values Pn = 50 HP, nn = 987 rpm, per phase; - rotor circuit resistance 0.2 ohm, - the stationary reactance is 0.5 ohm, - the loadability coefficient is 2.1 and - the number of pole pairs is 8. a)Calculate the motor's full load torque, tipping torque and idle speed and number of revolutions under maximum load. b)To give the motor a maximum torque, calculate the resistance value...
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....
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.
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
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...
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...
Most questions answered within 3 hours.
-
26) Briefly describe, using words or simple diagrams, the
chemiosmotic theory for coupling oxidation to phosphorylation...
asked 10 minutes ago -
Suppose that XX is a random variable with mean 16 and standard
deviation 5 . Also...
asked 1 hour ago -
Calculate the number density of argon gas at a temperature of
24C and a pressure of...
asked 4 hours ago -
Alternative
Classification
How to Estimate
Probabilities from Data? ( For continuous Attributes)
And How to generate...
asked 4 hours ago -
An explosion breaks a 20.0-kg object into three parts. The
object is initially moving at a...
asked 5 hours ago -
Calculate the approximate number of residues of Rubisco, which
is involved in carbon fixation in plants,...
asked 6 hours ago -
Other decisions about scientific claims can have a much broader
impact.ENERGYarrow-10x10.png, environment, health, security - all...
asked 7 hours ago -
I need to write a research paper and work cited about this
topic: The United States...
asked 7 hours ago -
Hello! I was wondering if I could have some help?
If the vapor pressure of carvone...
asked 7 hours ago -
An economist wants to estimate the mean per capita income (in
thousands of dollars) for a...
asked 8 hours ago -
What would be the input/output characteristic of a circuit
obtained by putting two of your 2's-complementers...
asked 8 hours ago -
In Drosophila, the transition from the syncytial blastoderm
stage to the cellular blastoderm stage is a...
asked 8 hours ago