A 25 kva 220-volt three phase alternator delivers rated kva at 0.84 power factor. The effective ac resistance between the armature winding terminals is 0.18. The field takes 9.3 amperes at 115 volts. If the friction and windage loss is 460 watts and the core loss is 610 watts. What is the hp delivered by the prime mover? A 32.6 B 31.54 C 28.15 D 33.23

Q: A three phase 20 pole star connected alternator has 140 slots on the armature. Each slot contains…

A: The solution can be achieved as follows.

Q: A single-phase AC generator feeds a load. The generator may be modeled as an ideal sinusoidal…

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Q: A 3-phase 100OKVA, 11000/416 transformer is delta-connected on the primary and star connected on the…

A: Given that  3-phsee , 11000V/416V , delta connected Xmer   S3ϕ=1000 KVAr1=1.45 ohmr2=0.0006…

Q: PROBLEM 4 A 14 pole, three phase alternator has 294 slots. Each coil spans 15 slots. If the winding…

A: We are authorized to answer only 1 question at a time since you have not mentioned which question…

Q: What are the losses taking place in an alternator?

A: The Power losses occur in the alternator due to a number of different mechanisms. These can be…

Q: The winding data for three different alternators are as follows I. 60 slots, four poles, span 1 to 9…

A: pitch factor=cos(short pitch angle2). slot angle=180slot /pole.

Q: A 3-phase, 50c/s, 8-pole star connected alternator has 72 slots and 10 conductors per slot. The flux…

A: The solution is given below

Q: What are the similarities and dissimilarities of a 3-phase induction motor and a transformer?

A: Similarities of a 3-phase induction motor and a transformer Both 3- phase Induction motor and…

Q: Draw the equivalent output waveform for every series and parallel clipper circuit network.

A: According to the given question, it is required to draw the equivalent output waveform for every…

Q: A 6 pole DC wave wound generator has 21 armature conductors with flux per pole is 29 mWb and the…

A: emf indued E = Flux×speed×no.of conductors60×no. of polesno. of parallel paths Given Flux=29 m Wb…

Q: A three-phase, star-connected alternator has 6 number of poles, armature with 160 slots and 6…

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Q: A 400 v, 50 Hz, three phase alternators, rated at 75 kVA, is star connected and driven at 1000…

A: According to the question we have to find the smallest lagging power factor at which the alternator…

Q: The generated voltage per phase of an alternator is E0 while the speed of rotor rotation is 3000…

A: We will establish the relation between the generated voltage and the speed of the alternator.

Q: A 4 pole d.c. generator runs at 750 r.p.m. and generates an emf of 240 V. The armature is wave wound…

A: Solution:Given data;D.c. generator,Pole p=4, Runs N=750 r.p.m,e.m.f E=240 V,Armature Wave.…

Q: Q2) convert the following: 1- decimal number to binary by using the repeated division by 2 method…

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Q: A 3– phase 8 pole alternator having delta connected winding is supplying at a frequency of 50 Hz.…

A: Given a 3-phase alternator having delta connected winding with, Number of pole, P = 8 Frequency, f =…

Q: A 3-phase, 16 pole alternator has a wye connected armature winding with 144 slots, 10 conductors per…

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Q: In a three-phase star connected alternator it is necessary to generate 7200 line voltage at…

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Q: There are 72 slots in a 3-phase, 8-pole, 50 Hz, star connected alternator. There are 2 conductors in…

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Q: 3.17. A 200-turn coil is rotating at a speed of 3600 rpm in a 4-pole generator. The flux per pole is…

A: The given question is solved in step by step process.Explanation:

Q: A single phase 120V AC sourc controls power to a resistve load 202 using integral cycle control. a)…

A: Note: As per our policy, I have attempted the first three subquestions. Given data: The source…

Q: A 3-phase, 16 pole alternator has a star connected winding with 144 slot and 10 conductor per slot.…

A: This question belongs to electrical machine . It is based on the concept synchronous generator .…

Q: The rating of a three-phase star-connected alternator is 1750 KVA, 11 KV, The armature resistance is…

A: we need to determine voltage regulation at given load and power factor.

Q: A 6 pole DC wave wound generator has 34 armature conductors with flux per pole is 29 m speed of the…

A:

Q: If two 3-phase induction machines are mechanically coupled with each other. The two machines are…

A: The induction motors are coupled here mechanically. The speed will same for both machines because of…

Q: A three phase 4 pole star connected alternator has 120 slots on the armature. Each slot contains 8…

A: 3 phase star connected alternator No of slot =120 No of conductor per slot = 8 2 conductor make a…

Q: A three-phase, star-connected alternator has 6 number of poles, armature with 140 slots and 4…

A:

Q: 3. Find (a) the no-load phase voltage, (b) Kc and (c) Kd of a star- connected, 3-phase, 6-pole…

A: Number of poles is, .Speed, .Flux per pole, ..Each coil has turns and the coil is chorded by one…

Q: A three-phase synchronous generator is rotating at 1500 RPM synchronous speed. The output power of…

A: In this question we will find induced torque in generator...

Q: 8A (L 2A

A: In source transformation, one source works at a time. When 8 A is OC , 9 ohm and 3 ohm resistors…

Q: A 1200 kVA, 6600 volt, 3-phase, Y-connected alternator has an effective resistance of 0.40 ohm and a…

A: Power factor :- It is the ratio of Active power to the Apparent power of the circuit. Power factor=…

Q: 8-pole 3-phase star-connected alternator with 144 grooves in its armature rotates at 900 rpm. There…

A: Given values are - P=8Phase=3GroovesSlotsS=144NS=900rpmConductors per groovesSlots=12Flux per…

Q: A 3-phase, 16-pole, 60 Hz star connected alternator has 144 slots and 12 conductors/slot. The…

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Q: The rating of a three-phase star-connected alternator is 1500 KVA, 11 KV, The armature resistance is…

A: If alternator rating 1500kVA, line voltage 11kV Armature resistance Ra= 1.2ohm Synchronous Reactance…

Q: v. With reference to an 50 Hz3 phase alternator explain how P,Q,V and F are controlled.

A: It is asked to explain the control of P (active power),Q (reactive power), V (voltage) and F…

Q: They are usually made of copper. Field coils are former wound and placed on each pole and are…

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Q: An Armature runs at 250 r.p.m. and generates an e.m.f. at 50 Hz. There are 216 slots each…

A: The information provided in question are:

Q: A 4-pole DC generator runs at 650 rpm and generates an EMF of 200 V. The armature is wave wound and…

A: Given a DC generator with, Rated emf, E = 200 V Total number of pole, P = 4 Speed, N = 650 rpm Wave…

Q: A three-phase, star-connected alternator has 8 number of poles, armature with 160 slots and 2…

A:

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.