If the emf from the air gap line is the 3-phase alternator is 440V per phase and armature current is 110 A. What is the synchronous is reactance

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: To change the direction of rotation of a series wound DC generator the general rule is to

A: To change the direction of rotation of a series wound DC generator  Note: we always change the…

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 10kVA, 230 Volts, single phase generator has synchronous impedance of 0.5 + j1.2 ohms per phase.…

A: The solution is given below

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

A:

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: An rms ac voltmeter and a peak-to-peak-reading ac voltmeter are to be used to determine whether…

A: The given peak to peak reading should be converted into peak value and then convert it into RMS…

Q: What is difference in alternator and generator?

A: Difference between alternator and generator

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: dc compound generator

A:

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: What are the short circuit test observations of three phase synchronous alternator

A:

Q: a 3 phase, 50 hz synchronous generator has 200 conductors per phase. The flux per pole is 30mwb and…

A: 3 phase synchronous generator frequency f = 50 Hz  number of conductors per phase Z = 200 number of…

Q: What are rotor faults in alternators

A: The rotor of an alternator is directly connected with field winding of the alternator whenever there…

Q: How can you tell that the power pumped by an alternator is directly proportional to the load angle?

A: Alternator pumped the active power into the system but it does not give guarantee to pumped reactive…

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: Q5) An alternator has 36 slots per pole. One coil lies in the slots number 1 and 31. Calculate the…

A: The question is about winding pitch.

Q: A 6 pole DC wave wound generator has 28 armature conductors with flux per pole is 25 mWb and the…

A: Let N is be the speed in rpm EMF induced = flux×speed N ×no. of conductors60×no.of polesno.of…

Q: If it is desired to bring alternating current out of a generator, what kind of a "take-off" system…

A: If the alternating current is required from the generator a copper or brass rings are connected at…

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

A:

Q: (d) A non-liner load is connected to a 110 V, 50 Hz power supply. Determine whether the current of…

A: It is given that: V=110Vf=50Hzharmonic=3rd

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

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

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

A:

Q: A star connected Alternator excitation voltage and terminal voltages per phase respectively are 180V…

A: Alternator: It is used to convert the mechanical energy to electrical power in the form of…

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

A:

Q: 150 KVA, 2000 volts three-phase wye connected alternator has an open circuit emf of 1800 volts. When…

A: Synchronous impedance =per phase open circuit terminal voltage at certain field current / per phase…

Q: Before closing the synchronism switch to connect two alternators in parallel, it is observed in a…

A: Given: A set of 3 lamps

Q: circuit connection diagram on how to synchronize an alternator to the grid using lab volt. using…

A: The purpose of the synchronization is to ensure that during the circuit breaker closure (closing the…

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

A: We will find the pitch factor in each case as shown below.

Q: What is the ignition phase R S T in each thyristorThree-phase AC voltage regulators delta connection…

A: We have to explain the ignition phase RST in each thyristor Three-phase AC voltage regulators delta…

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

A:

Q: EXPLAIN BRIEFLY THE SYCHRONOUS ALTERNATOR WHEN OPERATING AT NO LOAD

A:

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

A:

Q: The distribution factor for 90 slots, 10-pole, 3-phase winding is A 0.90 B C D 0.895 0.959 0.978

A: Given: A 3-phase winding machine with, Slots = 90. Pole = 10.

Q: What is the speed of a 100kW, 230V, three-phase, four-pole, 60Hz alternator? a. 450 rpm b. 900 rpm…

A: This is a problem of three phase alternator. The detailed solution is given in the next step

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 1600KVA, 6.7 kV, 3 phase wye-connected alternator has an effective resistance of 0.50 ohm per…

A:

Q: If dc generator of a simple two layers progressive wave winding has 21 number of slot and four…

A: Given the total number of slots is S=21  The number of poles is 4 The front pith formula for the…

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.