Question

A 100 hp, three-phase, 60Hz, 460V, four-pole, Y-connect synchronous motor is operating leading at 0.8 p.f....

A 100 hp, three-phase, 60Hz, 460V, four-pole, Y-connect synchronous motor is operating
leading at 0.8 p.f. at rated conditions.
Excluding field and stator losses, the efficiency is 96% and the synchronous reactance is 2.72ohm.
Find

a) Induced torque
b) Armature current
c) Internal induced electromotive force and power angle.
d) Maximum load that can be driven by this electric motor.

answer
a) 412.2 N-m
b) 121.9 A
c) 535.5 V, 29.7 deg
d) 153.8 kW

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
(360) Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole -connected synchronous motor has 0.9Ω synchronous reactance....
(360) Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole -connected synchronous motor has 0.9Ω synchronous reactance. Friction; wind; core losses and armature resistance are neglected. a) If the motor is operating under magnitude of phase current (ia) (180) Ampere and power factor of 0.6 lagging, 1. Find the input power of motor in hp 2. Find the generated voltage, EA 3. Find the torque and the maximum inducible torque in current state. b) If EA is increased by 18% find,...
410 Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole Triangle connected synchronous motor has 0.9Ω synchronous...
410 Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole Triangle connected synchronous motor has 0.9Ω synchronous reactance. Friction; wind; core losses and armature resistance are neglected. a) If the motor is operating under magnitude of phase current (ia) 230 Ampere and power factor of 0.6 lagging, 1. Find the input power of motor in hp (10p) 2. Find the generated voltage, EA (10p) 3. Find the torque and the maximum inducible torque in current state. (10p) b) If EA is...
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz synchronous generator rated to deliver 1687.5 kVA...
A submarine has a 3-phase, Y-connected, 2- pole, 60Hz synchronous generator rated to deliver 1687.5 kVA at a FP = 0.8 lagging with a line voltage of 450-V. The machine stator resistance RS = 0.004 ?. The synchronous reactance is Xs=0.08 ?. The actual system load on the machine draws 900 kW at FP = 0.6 lagging. Assume that a voltage regulator has automatically adjusted the field current so that the terminal voltage is its rated value. Mechanical losses are...
A 75-kW, 440-V, 0.8-PF-leading Y-connected synchronous generator has an armature resistance of 0.22 Ω and a...
A 75-kW, 440-V, 0.8-PF-leading Y-connected synchronous generator has an armature resistance of 0.22 Ω and a synchronous reactance of 3.0 Ω. Its efficiency at full load is 89% (1 Hp=746 watt). (a) What is the line current of the generator at rated conditions? (b) What is the internal generated voltage EA of this motor at rated conditions?
A 3- phase, 2 pole Y-connected synchronous machines has a line-line voltage of 6,000V in 60Hz...
A 3- phase, 2 pole Y-connected synchronous machines has a line-line voltage of 6,000V in 60Hz power line, has an armature reactance of 2ohms/ phase and negligible armature resistance. Compute the following A) In case of generating action if the line current is 385 A at a leading power factor of 0.8, the armature voltage per phase is 3464V, Compute the voltage per phase and power angle. B) Draw the phasor diagram. C) If the losses in the machine is...
20-pole, 200 hp, 660 V, 60 Hz, Y-connected, three-phase synchronous motors are operating at no load....
20-pole, 200 hp, 660 V, 60 Hz, Y-connected, three-phase synchronous motors are operating at no load. The rotor lags 0.5 degrees to the magnetic flux of the rotor with a mechanical angle, with the induced equipment power adjusted to the same magnitude as the phase voltage applied to the armature. The synchronous reactance is 10 ohms and the armature resistance is 1 ohms. Find a) The load angle of the rotor expressed in electrical angles. b) Armature current c) Equivalent...
The 400 V, 50 kVA, 0.8 power factor leading delta connected synchronous motor has synchronous reactance...
The 400 V, 50 kVA, 0.8 power factor leading delta connected synchronous motor has synchronous reactance of 3-ohm, resistance neglected. It is supplying a 12-kW load with initial power factor of 0.86 lagging. The windage and friction losses are 2.0 kW and the core losses are 1.5 kW. Determine (a) the motor efficiency; the line current; armature current; and excitation voltage. (b) If the flux of the motor is increased by 20 percent determine the excitation voltage; armature current; and...
A 2300-V, 400-hp, 60-Hz, 1200rpm, Y-connected synchronous motor has a rated power factor of 0.8 leading....
A 2300-V, 400-hp, 60-Hz, 1200rpm, Y-connected synchronous motor has a rated power factor of 0.8 leading. The efficiency of the motor is 90 % at full load. The armature resistance is 0.3 Ω, and the synchronous reactance is 3.55 Ω. Answer the following questions when it is operating at full load; Question 1 What is the number of poles in this motor? 2 4 6 8 10 12 Question 2 Find the output torque in Nm.(Assume 1hp=745.7W) 1985.7 2373.6 2011.9...
a 460-V 100-hp 60-Hz 4 pole Y connected synchronous motor has a operating power factor 0.85...
a 460-V 100-hp 60-Hz 4 pole Y connected synchronous motor has a operating power factor 0.85 leading the aramature resistance is o.2 ohms and synchronous reactance is 12 ohms at full load the efficiency is 85% find the sum of mechanical loss core loss and stray loss when meachine is operating at full load
3) A three-phase, nozzle, 4-pole cylindrical pole synchronous generator feeds a 400 Volt, 50Hz conversion center....
3) A three-phase, nozzle, 4-pole cylindrical pole synchronous generator feeds a 400 Volt, 50Hz conversion center. The synchronous reactance of the synchronous generator is 0.72 Ove armature resistance is neglected. The relation between the pole voltage E 'induced in the induction of the synchronous generator and the excitation current, is selected as E, = 824. In this working environment of the synchronous generator, a.) On the consumer screen, find the excitation current (U), load values, internal phase values, the moment...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT