A 500 KVA, 3,600 Volt, 3-phase, 60 Hz alternator has an effective armature resistance per phase of 0.40 ohm. Mechanical and iron losses are 10 kW, field current at full load unity pf is 70 Ampere. The exciter voltage is constant at 120 Volts. What is its efficiency when supplying incandescent lamps at half full load

Q: Armature reaction in an alternator affects generated voltage/phase Select one: O True O False

A: In this question we will write effect of armature reaction in an alternator....

Q: Discuss the significance of SCR in designing an alternator

A: In this we will write about short circuit ratio..

Q: Explain how two or more alternators can be synchronised

A: We need to explain how two or more alternators can be synchronised.

Q: What is short circuit characteristics of (s.c.c) of an alternator Explain? Explain the effect of…

A: According to the bartleby's guideline we should solve only one question so please post another…

Q: What is the difference between alternating current (AC) and direct current (DC)?

A: Electricity is essential in modern civilization, powering a wide range of gadgets and processes. Its…

Q: The voltage regulation of an alternator having 0.75 leading power factor load, no-load induced emf…

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Q: A 8 pole, three-phase, star-connected alternator has an armature with 140 slots and 6 conductors per…

A: 3 phase star connected alternator has  8 pole, total no of slot =140 6 conductor per slot Speed N=…

Q: 78 The induced emf of a dc machine running at 750 rpm is 220 V. The percentage increase in field…

A: we need to determine percentage increase in the field flux.

Q: Armature reaction in an alternator primarily affects

A: Conceptual Background:- Armature Reaction:- Simply put, the armature reaction depicts how the…

Q: Question 1 A 125 MVA, 20 kV, three-phase, wye-connected, 60 Hz, synchronous alternator is connected…

A: From the given data,to find the given answers to questions given = ?

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

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Q: What is the effect of the capacitive load to the terminal voltage of the alternator?

A: It is known that capacitive load supplies leading reactive power in any circuit. and the apparent…

Q: There are 90 slots in the armature of a 3-phase, 50 Hz., 6 pole, star connected alternator. Winding…

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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: 16. In an alternator, what is pitch factor? 17. The power factor of the alternator will depend on…

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

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Q: Given field excitation at 10A in an alternator that exerts current of 150A (short circuit) and a…

A: The solution is given below

Q: a) A sinewave is having a frequency of 100 Hz and instantaneous value of 200 Volts at 1.1 milli…

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Q: The meter constant of a single phase 230 Volt induction watt hour meter is 400 revolution per kWh,…

A: Given a induction watt hour meter with, Voltage, V=230 V. Meter constant, K=400 revkWh. Current,…

Q: 1- In an alternator, the armature reaction influences the magnitude of Wave form of generated…

A: NOTE- “Since you have posted a question with multiple sub-parts, we will solve first three subparts…

Q: sinewave is having a frequency of 50 Hz and taneous voltage of 200 Volts at 1.2 milli ds. Find:…

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Q: There are 180 double wound slots in a 3-phase, 50 Hz., 500 rpm, star connected alternator. Coil span…

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Q: From what source does a rotating field type alternator receive its exciter voltage?

A: Alternator: Alternator is an electrical device which is used to convert the mechanical energy into…

Q: 1- Please answer the following questions. a- How is the alternator end voltage change in resistive…

A: a- How is the alternator end voltage change in resistive load, inductive load and capacitive loads…

Q: What is the effect of an unbalanced load on the output voltage of an alternator?

A: The explanation is as follows.

Q: WHAT ARE THE TWO TYPES OF AN ALTERNATOR WITH REGARDS TO THE CONSTRUCTIONS AND ITS APPLICATION

A: The solution is given below

Q: 5. A welder machine operates automatically as follows : 30A current in 10 seconds, 20A in 10 sec.,…

A: In this question we will find RMS value of given waveform....

Q: A 550 volts, 55KVA single phase alternator has an effective resistance of 0.02 ohms, a field…

A: Given Data:- At full load, Voltage V=550 V Power S=55 kVA Effective resistance R=0.02 Ω Field…

Q: diode trio

A: A diode trio used in an alternator is to provide internal power to the rotor. Once the alternator…

Q: What are the main effects of losses on the performance of the alternator?

A: There are various effects of losses on the performance of alternator. To calculate the efficiency of…

Q: Calculate the speed and open-circuit line and phase voltages of a 4-pole, 3phase, 50 Hz star-…

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Q: What will be the frequency (in Hz)  for 100kW, 230V, 12-Pole, alternator running at 12 rps?

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Q: The voltage regulation of an alternator having 0.75 leading power factor load, no-load induced emf…

A: Power factor decides only the terminal voltages But once the voltages are known  Power factor has no…

Q: How do we increase or decrease the generated voltage output in the operation of a factory finished…

A: Basics An alternator or synchronous generator is a machine that is used for converting mechanical…

Q: Make a general statement on the effect of increasing excitation to the power factor of the…

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Q: What is the basic principle of alternators?

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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.