Question

A long-shunt compound generator running at 1000 r.p.m. supplies 22 kW at a terminal voltage of...

A long-shunt compound generator running at 1000 r.p.m. supplies 22 kW at a terminal voltage of
220 V. The resistance of the armature, shunt field and series field are 0.05 Ω, 110 Ω, and 0.06 Ω
respectively. The overall efficiency at the above load is 88 %. Find (i) Cu losses (ii) iron and
friction losses and (iii) torque exerted by the prime mover.

1 0
Add a comment Improve this question Transcribed image text
Answer #1

o Long shunt Compound generator is Ish To » tish Rsh Io 18 Roe 157 Ra Vo given Supply pauser POF 22kW at Vo=2204 Raz .05 Rsescig friction and son loss from efficacy given a Me 88% X 100 288 n R PetI?R +Ironithid Priction loss .88 22x103 22x103 + 1584Torque escertid using as Mechanical Input power Frection and ioonkeyse Electrice power funded Ta wa PL = P= Eg I a Pua 1415.5

Add a comment
Know the answer?
Add Answer to:
A long-shunt compound generator running at 1000 r.p.m. supplies 22 kW at a terminal voltage of...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

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
  • 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...

  • A) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field c...

    a) The input current to a 220 V, short-shunt compound motor at no load is 6 A. The shunt- field circuit resistance is 220 Ω; the armature resistance is 0.112, and the series-field resistance is 0.1 Ω, what is the stray power loss ? (b) Assume the input rating of the motor in Part (a) to be 66 A at 220 V with a no-load speed of 1000 rpm. If the stray power loss varies as the counter-electromotive force and...

  • 1. A shunt machine, while running as a generator, has an induced voltage of 260 V...

    1. A shunt machine, while running as a generator, has an induced voltage of 260 V at 1200 rpm. Its armature and field resistances are 0.2 2 and 110 Q, respectively. If the machine is run as a shunt motor, it takes 4 A at 220 V (i) Draw the schematic diagram of the machine as a generator. (ii) Draw the schematic diagram of the machine as a motor (iii)At a certain load the motor takes 30 A at 220...

  • A-4 pole, lap-wound, long shunt, dc compound generator has useful flux per pole of 0.07 Wb....

    A-4 pole, lap-wound, long shunt, dc compound generator has useful flux per pole of 0.07 Wb. The armature winding consists of 220 turns and the resistance per turns is 0.004 Ω. Calculate the terminal voltage if the resistance of the shunt and series field are 100 Ω and 0.02 Ω respectively; when the generator is running at 900 rpm with armature current 50 A. Also calculate the output power in kW for the generator.

  • A 2300 V (terminal voltage), 1000 kVA, 0.8 PF lagging, 60-Hz, two pole, Y connected synchronous g...

    A 2300 V (terminal voltage), 1000 kVA, 0.8 PF lagging, 60-Hz, two pole, Y connected synchronous generator has a synchronous reactance of 1.1 2 and an armature resistance of 0.15 Ω. At 60Hz, its friction and windage losses are 24 kW, and its core losses are 18 kW The field circuit has a dc voltage of 200 V, and the maximum If Ir is 10 A. The resistance of the field circuit is adjustable over the range from 20 to...

  • A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be...

    A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be its terminal voltage when running at 1800 rpm? Ra-.3 3. Q and Rsh 150 ohms. A 40 KW shunt generator produces terminal voltage of 220 V when running at 1500 rpm. What will be its terminal voltage when running at 1800 rpm? Ra-.3 3. Q and Rsh 150 ohms.

  • Electrical machines

    A 220 V shunt motor takes 105 A. The armature resistance 0.08 Ω and shunt filed resistance is 44 Ω. The motor runs at 950 r.p.m. If iron and friction losses are equal to 2 kW, find (i) brake horse power (b.h.p.), (ii) total torque and (iii) shaft torque.

  • 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...

  • A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance...

    A 8250 w shunt DC motor has a terminal voltage of 300 V. A field resistance Rf of 40 Ω, and an armature resistance Ra of 250 mm2. The field winding has 1500 turns. An adjustable resistance Rad is connected in series to the field winding. Rad is set at 20 Ω, but it can vary from 0 to 80 Ω. The magnetization curve is shown in Figure.1 and it is taken at a speed of 1200 rpm. (Armature reaction...

  • 1. A 300 V compound motor has armature resistance 0.18 Ω, series field resistance 0.3 Ω...

    1. A 300 V compound motor has armature resistance 0.18 Ω, series field resistance 0.3 Ω and shunt field resistance 100 Ω. The rotational losses are 200 W. On full load the line current is 25 A and the motor runs at 1800 rpm. Determine: (i) the developed mechanical power (ii) the output power (iii) the output torque (iv) the efficiency at full load 2. A 120 V series motor has 0.2 Ω field resistance. On full load, the line...

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
ADVERTISEMENT