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…

A:

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…

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

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Q: Find the no load line voltage of a wye connected 3-phase, 6pole alternator which runs at 1200 rpm…

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Q: The voltage regulation of alternator can be regulated by changing its rotational speed. O True O…

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

A:

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

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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: 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…

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

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Q: The alternator frequency is direct function of rotational speed and number of poles. O True O False

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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…

Q: A 4-pole, 3 phase, 50 Hz, wye-connected alternator has 44 slots with 60 turns in each coil and…

A:

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: 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,…

Q: Calculate the pitch factor for an alternator winding with 36 slots, 4 poles, and coil span of 1 to…

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Q: In capacitive AC circuit voltage is leading current O a. True O b. False

A: In the given questions we need to discuss about the properties of capacitor.

Q: Indicate the equation that allows determining the voltage generated per phase, in a three-phase…

A: The explanation is as follows.

Q: An altemator is required to generate a line voltage of 415 V on an open circuit. If the machine is a…

A: Given,  An 3 phase star connected alternator has, Line to line generated voltage (EL)=415 Volts…

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 3-phase,50Hz, 4-pole, Y-connected alternator has 6 slots per pole per phase. The armature has…

A:

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-…

A:

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: 3.The voltage generated across one inductor of an alternator is 8.11V. There are 120 slots and 4…

A: The e.m.f induced in one conductor = 8.11 V No. of slots (S) = 120 Synchronous speed (Ns) = 720…

Q: A 16-pole, three-phase, Y-connected alternator. The number of turns per phase is 216. The rotor…

A: Given, A three phase alternator with P=16N=216 turns per phaseNs=375 rpmϕ=25 mWb/pole

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 12V rms ac supply is connected to the primary winding of a transformer with a turns ratio 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.