Question

7-     a 3 phase induction motor haring a synchronous speed is 1600 rpm. it draws a...

7-     a 3 phase induction motor haring a synchronous speed is 1600 rpm. it draws a current of 100Kw a from a 3-phase source. The copper losses and iron losses in the stator are 6KW if the motor runs at 1500 rpm, calculate the following
A- The active power transom to the rotor
B- The rotor I2R losses
C- The mechanical power developed.
D- The mechanical power delivered to the load, knowing that the windage and friction losses are equal to 3KW
E. The efficiency of the Motor

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Q4 (a) A 3-phase induction motor having a synchronous speed of 1200rpm draws 80kW from a...
Q4 (a) A 3-phase induction motor having a synchronous speed of 1200rpm draws 80kW from a 3-phase feeder. The copper losses and core losses in the stator amount to 5kW. If the motor runs at 1152rpm, calculate: (i) the rotor input power; (ii) the rotor copper losses; (iii) the gross mechanical power output; (iv) the net mechanical power with knowing that the windage and friction losses are 2kW; (v) the efficiency of the motor (b) Compare the brushed motor (DC...
A 480V, 60Hz, 50hp, three phase induction motor draws 60 amps at 0.85 power factor lagging....
A 480V, 60Hz, 50hp, three phase induction motor draws 60 amps at 0.85 power factor lagging. The stator copper losses are 2kW and the rotor copper losses are 700W. The friction and windage losses are 600W, the core losses are 1800W. (1) Determine the airgap power. (2) Determine the power converted into mechanical form. (3) Determine the net output power. (4) Determine the efficiency of the motor.
A 100 KW (OUT PUT), 3300V, 50 Hz, 3-Phase star connected induction motor has a synchronous...
A 100 KW (OUT PUT), 3300V, 50 Hz, 3-Phase star connected induction motor has a synchronous speed of 500 rpm. The full load slip is 1.8%and full load power factor 0.85. Stator copper loss=2440W. Iron loss=3500W. Rotational losses= 1200W. calculate : The rotor copper loss The line current The full load motor efficiency.
A 400V, 2 pole, 50 Hz, three-phase induction motor is drawing 60 A at 0.85 PF...
A 400V, 2 pole, 50 Hz, three-phase induction motor is drawing 60 A at 0.85 PF lagging. The stator copper losses are 2 kW, the stator core losses are 1.8 kW and rotor copper losses are 700 W. The friction and windage losses are 600 W, the stray loss 100 W, and rotor core loss 100 W. Find the following quantities: a. The air gap power. b. The developed mechanical power. c. The output power. d. The efficiency of the...
A 37.3 kW, 3 phase, 4 pole, 50 Hz, induction motor has a full load efficiency...
A 37.3 kW, 3 phase, 4 pole, 50 Hz, induction motor has a full load efficiency of 85%. The friction and windage losses are one third of the no load losses and the copper loss equals the iron loss at full load. Find the full load speed. Stator resistance may be neglected. [Answer: 1401.3 rpm]
Q4) A three-phase, 104 kW, 3300 V, 50 Hz, Y-connected induction motor delivers full output power...
Q4) A three-phase, 104 kW, 3300 V, 50 Hz, Y-connected induction motor delivers full output power to a load connected to its shaft. The full-load slip is 0.02 and full-load power factor is 0.85 lagging. If the stator copper loss is 2400 W, the stator core loss is 3500 W, and the friction and windage loss is 1200 W. Calculate: (i) The developed mechanical power. (ii) The air gap power. (iii) The rotor copper loss. (iv) The efficiency of the...
Problem 3: A 3-phase, 4 pole, 50 Hz induction motor is supplied by 200 V supply....
Problem 3: A 3-phase, 4 pole, 50 Hz induction motor is supplied by 200 V supply. Its full load slip is 2%. At full load, stator copper losses are same as rotor copper losses. Stator iron losses are 50% more than stator copper losses. Mechanical losses are one third of no load losses. Full load output is 50 H.P. Calculate the efficiency on full load.
A three phase, 4 pole induction motor has the nominal speed of 1425 rpm. If the...
A three phase, 4 pole induction motor has the nominal speed of 1425 rpm. If the stator, rotor and airgap losses are all the same what is the efficiency of the machine?
A 6-pole and three-phase induction motor has synchronous speed of 1125 RPM. a) Find the no-load...
A 6-pole and three-phase induction motor has synchronous speed of 1125 RPM. a) Find the no-load and full-load operating speed of motor for the cases given 1. 2.5Hz electrical frequency of rotor for no-load condition. (15p) 2. 6.3Hz electrical frequency of rotor for full-load condition. (15p) b) Find the speed regulation of motor by using parameters found above. (10p) c) Determine the electrical frequency of rotor under full-load condition so that speed regulation would be equal to 5%? (Electrical frequency...
A three phase Wye-connected 460 v, 4 poles, 60 Hz wound rotor induction motor has the...
A three phase Wye-connected 460 v, 4 poles, 60 Hz wound rotor induction motor has the following parameters: R1=0.3, R2=0.15, X1=0.5, X2=0.2, Xm=14 The total friction, windage, and core loss is constant at 400 w. The motor is working at its rated voltage and drives its load at 1764 rpm. a)Calculate the input current and the input power. b)Calculate the output mechanical power and torque and motor efficiency. c)Calculate the starting current of this motor and compare it with its...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT