HomeworkLib
Question

In a 110 V compound generator, the resistances of the armature, shunt and series windings are...

In a 110 V compound generator, the resistances of the armature, shunt and series windings are 0.06 ohm, 25 ohm and 0.04 ohm respectively. The load current is 50 A at 120 V. Find the induced e.m.f. and the armature current when the machine is connected as (i) long-shunt and as (ii) shortshunt. How will the ampere-turns of the series field be changed in (i) if a diverter of 0.1 ohm be connected in parallel with the series winding? Allow 1 V per brush for contact drop and ignore armature reaction.

engineering   Electrical-Engineering   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
In a 110 V compound generator, the resistances of the armature, shunt and series windings are...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • In a 110 V compound generator, the resistances of the armature, shunt and series windings are...

    In a 110 V compound generator, the resistances of the armature, shunt and series windings are 0.06 ohm, 25 ohm and 0.04 ohm respectively. The load current is 50 A at 120 V. Find the induced e.m.f. and the armature current when the machine is connected as (i) long-shunt and as (ii) short-shunt. How will the ampere-turns of the series field be changed in (i) if a diverter of 0.1 ohm be connected in parallel with the series winding? Allow...

  • A 240V compound machine with resistances of armature, shunt and series winding are 0.06ohm, 24ohm...

    A 240V compound machine with resistances of armature, shunt and series winding are 0.06ohm, 24ohm, 0.002ohm respectively. The line current is 100A at 240V. find the Back EMF and the Armature current when the machine is connected as connected as: a. Long shunt compound motor. b. Short shunt compound motor. 6) A 240V compound machine with resistances of armature, shun and series winding are 0.062, 242, 0.022 respectively. The line current is 100A at 240V. find the Back EMF and...

  • A short shunt compound generator supplies 50kW at 230V. The shunt field, series field and armature...

    A short shunt compound generator supplies 50kW at 230V. The shunt field, series field and armature circuit resistances are 46 ohms, 0.02ohms and 0.01ohms respectively. The brush contact drop is 2V. Determine the percent voltage regulation. 3.73% b. 4.55% c. 3.88% d. 3.72% A DC series generator supplies a load of resistance of 1.4 ohms through a pair of feeder conductors of total resistance of 0.1ohms . The voltage at the DC generator terminal is 120 V. What is pd...

  • A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns...

    A long-shunt, cumulatively compounded dc generator has 1800 shunt-field turns per pole and 12 series-field turns per pole. The armature resistance is 0.12 ohm, the series-field resistance is 0.04 ohm, and the shunt-field resistance is 210 ohms Data for the open-circuit characteristic at 1700 r/min is as follows: Volts 110 200 280 300 Amperes 0.5 1.9 2.35 The generator supplies a load of 15 kW at 200 V when it is driven at 1700 r/min. Determine the speed at which...

  • Q3) A 20 kW compound generator works on full load with terminal voltage of 230 V....

    Q3) A 20 kW compound generator works on full load with terminal voltage of 230 V. The armature, series and shunt field resistances are 0.1, 0.05 and 115 ohm respectively. Calculate: a) The generated e.m.f , if connected short shunt. b) The generated e.m.f, if connected long shunt. c) If the machine is connect short shunt, the iron and friction losses at rated power equal to 850 W. calculate the mechanical efficiency, electrical efficiency and commercial efficiency.

  • QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an...

    QUESTION 1 A) (10 marks) A 10 kW, 250 V DC self-excited shunt generator, with an armature resistance of 0.1 ohm, is delivering 80 % of rated power to the mains at rated voltage when being run at 1000 r.p.m. (revolutions per minute). The field circuit resistance is 220 ohms. The brush contact drop is 0.5 V and rotational (mechanical) losses are 750 W Calculate The induced voltage The electromagnetic torque developed The shaft torque The overall efficiency B) (15...

  • 3. A 20kW, 250V, 1000rpm shunt excited dc motor has armature and field resistances of 0.2...

    3. A 20kW, 250V, 1000rpm shunt excited dc motor has armature and field resistances of 0.2 ohm and 2002. When the motor takes 80A rated current at rated conditions. Draw the equivalent circuit and calculate induced torque at 1200rpm. Explain the starting current limiting methods for DC motors. (30 pts) 4. Explain the conditions for parallel operation of synchronous generators. A three phase, wye connected, synchronous generator is rated 150 MW, 0.85 lagging power factor, 12.6 kV, 60 Hz, and...

  • Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating...

    Show all working 1. A 4 pole, 220 V, 10 H.P, d.c. shunt motor is rotating at a speed of 320 rpm. Then the developed useful torque is 2. A 4 pole, lap wound d.c. motor drawing an armature current of 20 A has 360 conductors. If the flux per pole is 0.015 Wb then the gross torque developed by the armature of motor is 3. A 220 V, d.c. motor draws an armature current of 20 A. Its armature...

  • 3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field...

    3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the series-field resistance is 0.01 and total shuntfield resistance is 100 2. Calculate the mmf when the machine operates at (a) no-load and (b) full-load Circuit Calculation(s) ha armature is connecte A permanent magnet dc motor tumsa source. Calculate the armature voltage requin (b) 1600 rpm. Neglect armature resistance. Circuit agnet de motor...

  • A DC shunt generator delivers a load current of 50 A at 300 V with its...

    A DC shunt generator delivers a load current of 50 A at 300 V with its field circuit resistance being 50 ohms. The armature circuit resistance of the generator is 2 ohms The generator has a linear excitation with a constant rotor speed. The brush voltage drop is negligible. Aiding with a drawing of equivalent circuit, estimate: i) The field current, armature current and generated voltage of the generator when it delivers the 100 A at 300V; and (ii) The...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT