Question

Q1. A 440 V, 60 Hz, six-pole, 3 phase induction motor is taking 50 kVA at...

Q1. A 440 V, 60 Hz, six-pole, 3 phase induction motor is taking 50 kVA at 0.8 power
factor and is running at a slip of 2.5 percent. The stator copper losses are 0.5 kW and
rotational losses are 2.5 kW.

i) The rotor copper losses
ii) The shaft hp
iii) The efficiency
iv) The shaft torque

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
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 208 V 10 Hp four pole 60 Hz Y connected induction motor has a full...
A 208 V 10 Hp four pole 60 Hz Y connected induction motor has a full load slip of 5%. What is the output power of this motor in kW? If friction and windage loss is 350 watts, what is the gross mechanical output at full load? What is the gross torque of this motor at full load? What is the rotor cupper loss at full load? If the efficiency of this motor is 90% at full load what is...
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]
The following test data apply to a 7.5-hp, three-phase, 220-V, 19-A,60-Hz, four-pole induction motor with a...
The following test data apply to a 7.5-hp, three-phase, 220-V, 19-A,60-Hz, four-pole induction motor with a double-squirrel-cage rotor of design class C (high-starting-torque, low-starting current type): Test 1: No-load test at 60 Hz; Applied voltage V = 219 V line-to-line; Average phase current I1,nl = 5.70 A; Power Pnl =380 W; Test 2: Blocked-rotor test at 15 Hz; Applied voltage V = 26.5 V line-to-line; Average phase current ll,bl = 18.57 A; Power Pbl = 675 W; Test 3: Average...
Question A 208 V 10 Hp four pole 60 Hz Y connected induction motor has a...
Question A 208 V 10 Hp four pole 60 Hz Y connected induction motor has a full load slip of 5%. a)-What is the synchronous speed of this motor? b)-What is the shaft speed of this motor at full load? c)-What is the frequency of rotor current at full load? d)-What is the shaft torque of this motor at full load? e)-If the efficiency of this motor is 90% at full load what is the input power f)-If the efficiency...
A three-phase, 280 V, 60 Hz, 20 hp, 1710 r/m. Y-connected induction motor has the following...
A three-phase, 280 V, 60 Hz, 20 hp, 1710 r/m. Y-connected induction motor has the following impedances in ohms per phase referred to the stator circuit: R1=0.12 Ω.                Rˈ2=0.1 Ω X1=Xˈ2=0.25 Ω        Xm=10 Ω A total rotational loss are 400 W. The core loss is lumped in with the rotational losses. For a slip of 0.05 at the rated voltage and rated frequency. Find: a) The numbers of poles of the motor. b) The stator current. c) the power factor...
A three-phase, 60-Hz, 4-pole, 440-V (line-line, rms) induction-motor drive has a full-load (rated) speed of 1746...
A three-phase, 60-Hz, 4-pole, 440-V (line-line, rms) induction-motor drive has a full-load (rated) speed of 1746 rpm. The rated torque is 40 Nm. Keeping the air gap flux-density peak constant at its rated value. The frequency and voltage of the motor from above are adjusted such that the fan speed is changed to 600 rpm. The motor should be operating at 3% slip and rated Bm. What is the motor efficiency?
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 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?
Calculate full load torque developed by an 8 pole, 50 Hz, 3 phase IM Motor operating...
Calculate full load torque developed by an 8 pole, 50 Hz, 3 phase IM Motor operating with 4 % slip on full load. Motor develops Max. Torque at a speed of 700rpm. The rotor resistance of motor is 0.5 ohm per phase. Standstill rotor emf is 120v per phase.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT