Question

1, Explain the relation between reactive and real power in squirrel cage induction motor with load...

1, Explain the relation between reactive and real power in squirrel cage induction motor with load and with no load. ( just explain no need formulas)
2, in squirrel cage induction motor with load , what is the relation of Torque -speed curve , line current vs rated load and slip Vs rated load.
Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Solution 1.- Relation between real and reactive power in squirrel cage induction motor varies with load. AT no load reactive power required by the shunt branch to set up field and real power requirement is low at no load. Due to reactive power high and real power low the power factor of the induction motor is very low at no load.

At load real power requirement increased to match the load torque and that time some more reactive power required compared to no load for the series reactive component. Due to high real power at load and reactive power requirement is low compared to no load. the power factor of the squirrel cage induction motor is high.

solution 2

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
Briefly describe how the virtually constant reactive power requirement of a three-phase squirrel-cage induction motor affects...
Briefly describe how the virtually constant reactive power requirement of a three-phase squirrel-cage induction motor affects the motor power factor and efficiency?
a squirrel cage induction machine is driving a 700 N load through a wheel with a...
a squirrel cage induction machine is driving a 700 N load through a wheel with a diameter of 0.5 m using the simplified gamma model and the machine parameters presented below calculate the followings: a) The speed of the machine, assuming a flux linkage of 0.703: b)Stator current phasor is: c)Active power, reactive power, apparent power, and power factor from the point of view of the source the parameters are: -line to line voltage 480 v - # poles 4...
Consider a three-phase squirrel cage motor powered at 220 V / 60 Hz. It is known...
Consider a three-phase squirrel cage motor powered at 220 V / 60 Hz. It is known that at full load the power demanded from the network is 20,800 W, the line current is 64 A, and the speed is 830 rpm. The engine was designed to deliver a power of 25 HP. Calculate at full load: e) Output power f) The developed pair g) Efficiency
1- What are slip and slip speed in an induction motor? 2- How does an induction...
1- What are slip and slip speed in an induction motor? 2- How does an induction motor develop torque? 3- Why is it impossible for an induction motor to operate at synchronous speed? 4- Sketch and explain the shape of a typical inductionmotor torque-speed characteristic curve? Make the work clear, understandable and readable please. Thanks!
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?
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 480V, 60 Hz, 6-pole, three-phase, delta-connected induction motor has the following parameters: R1=0.461 Ω, R2=0.258...
A 480V, 60 Hz, 6-pole, three-phase, delta-connected induction motor has the following parameters: R1=0.461 Ω, R2=0.258 Ω, X1=0.507 Ω, X2=0.309 Ω, Xm=30.74 Ω Rotational losses are 2450W. Core loss is neglected. The motor drives a mechanical load at a speed of 1170 rpm. Ns = 1200rpm slip = 0.025 Line current = 26.87 angle -0.38 Pin = 20.745KW Airgap power = 19.71KW Converted power = 19.21KW Torque = 156.85Nm Pout = 16.76KW efficiency = 80.79% Find : 1. Pullout slip...
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955...
A 3-phase 50Hz 2-pole 440V (L-L rms) induction motor drive has a rated speed of 2955 rpm and rated torque of 35 Nm. This motor drives a load with a torque characteristic that increases linearly with speed such that it equals the load torque at the rated speed. It draws a current of 3.0 A(rms) per phase at the rated voltage at a power factor of 0.81 (lagging). The stator resistance Rs = {r_s} ohms. At the rated operating speed,...
Problem 1: A 800 V, 4 pole, 3 phase, and 50 Hz star connected induction motor...
Problem 1: A 800 V, 4 pole, 3 phase, and 50 Hz star connected induction motor has a rotor resistance and reactance per phase equal to 0.02 ohm and 0.2 ohm respectively. Determine 1) starting torque 2) slip at which maximum torque will occur 3) speed at which maximum torque will occur 4) Maximum torque 5) full load torque if full load slip is 8%. Assume ratio of stator to rotor turns as 8.
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...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT