One phase of a three-phase alternator consists of twelve coils in series. Each coil has an rms voltage of 15 V induced in it and the coils are arranged in slots so that there is successive phase displacement of 20 electrical degrees between the emf in each coil and the next. Find the rms value of the total phase voltage developed by winding. If the alternator has six poles and is driven at 200 rpm, calculate the frequency of the emf generated.

Q: is the RMS value of output voltage of the step down chopper which is having 240 V as a input for a…

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

A: We know the relation between emf phase ans speed of rotor. Ephase=4.44Kpkdfrequency*flux*turn…

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Q: An 8-Pole, 1-phase alternator has 64 stator slots. There are 4 conductors per slot and a…

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Q: An alternator is generating an emf per phase of EO while the rotor is rotating at a speed of 3000…

A: We know that  Ephase=4.44Kpkdfrequency*flux*turn frequency=speed*no of pole /120

Q: 6. A coil draws 1875 watts when connected to a 150 V DC source. It consumes 3072 watts when used on…

A: Given data, Power consumed P = 3072 W. Supply voltage V = 150 V.

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A: Given data: 3 phase alternator Pole P=4 Speed N= 1800 rpm Phase covers 2 slots under each pole…

Q: A 400 V , 50 Hz ,three phase alternator ,rated at 200 kVA at a lagging power factor of 0.835 , is…

A: Given: A 400 V, 50 Hz, three-phase alternator, rated at 200 kVA at a lagging power factor of 0.835,…

Q: Mean value of an AC supply is 270 volts. The value of RMS voltage is:

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Q: FIND THAT A SINUSOIDAL ALTERNATIVE VOLTAGE WITH A-350 VOLT AVERAGE VALUE WILL Reach 250 VOLT INSTANT…

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Q: A 3 phase 10 pole 600 rpm delta connected alternator has 12 slots/pole with 8 conductors per slot.…

A: Determine the rms value of the phase, line voltage and circulating current.

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

A: We will establish a relation between generated emf and the speed with which the rotor is rotating to…

Q: Q1/ Calculate the voltage per phase for a 3-phase 1500 rpm, 4-pole alternator having a 16 conductors…

A: Eph = 4.44 kpkdϕf Tphkp = pitch factor = cos α2α -short pitch angle kd = Distribution factor = sin…

Q: QI/ Caleulate the voltage per phase for a 3-phase 1500 rpm, 4-pole alternator having a 16 conductors…

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Q: An alternator is generating an emf per phase of EO while the rotor is rotating at a speed of 3000…

A: The  generated EMF phase is given by  Ephase=4.44Kpkdfrequency*flux*turn    Here frequency is…

Q: A synchronous generator generates 345 V at 50 Hz when the field current is 4.4A. The e.m.f generated…

A: Generator voltage E= 345 V at frequency 50Hz and field current 4.4A Find the voltage at frequency…

Q: Draw rough sketches showing the following: a. A current which lags the voltage by 60°. b. A current…

A: Phasors rotates in anti clockwise. Current lags the voltage means current comes after voltage.

Q: For alternator having fractional pitch winding of 11/15 the coil span is O 4.28 O 2.30 O 72.00 O…

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Q: In alternators is rotating part. ............... Answer:

A: Alternators are basically AC generators. The main parts of an alternator are Stator, Rotor, Armature…

Q: An alternating f.e.m generator has an effective value of 2000 V and a frequency of f=100 Hz. Find…

A: An alternator f.e.m generator has,The effective voltage of the generator, .The frequency of the…

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Q: A synchronous generator generates 350 V at 55 Hz when the field current is 3.7A. The e.m.f generated…

A: The solution is given in next step.

Q: A synchronous generator generates 370 V at 55 Hz when the field current is 4.4A. The e.m.f generated…

A: Generated emf of the synchronous generator is proportional to is frequency and current.

Q: An alternating f.e.m generator has an effective value of  2000 V and a frequency of f=100 Hz. Find…

A: The effective or RMS voltage of the generator, The frequency of the output voltage of the generator,…

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Q: An alternating current varying sinusoidally with a frequency of 50 Hz has an rms value of 40 A.…

A: This is a simple question based on network analysis and simple electrical engineering. The topic is…

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A: Given data, Active power P = 300 W RMS voltage V = 200 V RMS current I = 2.5 A

Q: Your company is to supply a 50 Hz alternator to a European company. The stator is wye connected with…

A: Given:- f=50 Hzϕ=0.173 weberT=28 turns

Q: A 60 Hz alternator stator is wye connected with each phase winding having 24 turns of wire. The…

A: f=60HzT=24 turnsϕ=0.103 weber

Q: 1. Sinewave A lags sinewave B by 30°. Both have peak values of 15V. Sinewave A is the reference with…

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Q: A 4 pole, 3 phase, star-connected alternator has 24 slots with 12 conductors per slot and the flux…

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

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Q: Determine the terminal voltage of a 4-pole, 3-phase alternator that is running at 50 hz. The…

A: Per phase induced emf =  4.44×f×flux×per phase turns× winding factor.

Q: The ripple factor for pure dc is Answer:

A: Ripple factor is ratio of ripple voltage to average voltage Ripple factor =ripple voltageaverage…

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Q: A synchronous generator is generating 300 V at 55 Hz at a field current of 3.4A. The e.m.f generated…

A: In this answer let us try to understand the relation between the emf generated in the synchronous…

Q: A single phase ac voltage source has 200 V rms and a system connected consumes an active power of…

A:

Synchronous Motor

The synchronous motor is an AC electric type motor where at a steady-state the shaft rotation is synchronized with the supply current variable-frequency. To an integral number of AC cycles, the rotation period is exactly equal. The stator of the motor in the synchronous motor contains multi-phase AC electromagnets due to which a magnetic field is created that rotates in time with the oscillation of the line current. The rotor contains a permanent magnet and the rotor rotates in synchronization with the stator field at the same rate and provides the second synchronized magnetic field which is rotating in nature as a result. When the synchronous motor is supplied with independently excited multi-phase AC electromagnets on both the rotor and the stator, it is termed as a doubly-fed machine. The most widely used AC-type motors are the synchronous AC motor and the induction AC motors.