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What is the working principal of 3 phase alternator?
A 3 phase alternator is an AC electrical generator with 3 sets of windings in the stator. These windings overlap each other in phase angle, or timing relationship, by 120 degrees with respect to each other. The rotor (field or excitation) current is DC, and is adjusted to regulate the output power.
How a 3 phase generator work?
For information about three phase electrical services see the answers to the Related Questions shown below.
Can a single phase of a three phase motor be used as a generator?
yes of course provided you satisfy the principle of generator a coil has to be rotated in a magnetic field. make arrangements to produce a magnetic field in either stator or rotor and also to draw produces current from the lets
How many amps for 1010 KVA generator per phase?
To answer this question the voltage of the generator must be given.
If Vab equals 400 v in a balanced Y-connected three-phase generator assuming the phase sequence is abc find the phase voltages?
400 v each phase
Is there any phase shift between input and output in cc configuration?
No, in a common collector (CC) configuration, the input and output signals are in phase with each other. This is because the output voltage is taken from the collector terminal, where the collector current flows without any phase shift.
What is the phase relationship between the input and output signals of the common collector amplifier?
Common emitter is the only transistor configuration that has an 180 degree phase difference between input and output. Common base and common collector outputs are in phase with the input.***********************************That is incorrect.The output of the common emitter is inverted, there is no phase shift.
Why 2 phase induction motors are not used in industries?
A two-phase* system is archaic, and has been completely superceded by three-phase systems, so there is no demand for two-phase induction motors. (*A two-phase generator has two phase windings, displaced from each other by 90 degrees.)
Is 10 kva supply to 3 phase load is equal to 10kva supply to single phase load?
Yes of course!! 10 kva electrical power is 10 kva electrical power either it would be three phase or single phase. But other factors i.e. current, voltage changes accordingly. Actually this question is quit confusable. Because in 3phase system, if each phase gives 10kva power (single phase power = 10 kva) then 3 phase power will be 10 X 3 = 30 Kva If we go leteratualy towasrds the question, then the asnwer will be - No. becasue 10 kva supply to 3 phase load will be 3phase supply(i.e440V) & 10kva supply to single phase load will be single supply (i.e 250V).
What is the reason that line voltage is 1.732times of phase voltage?
This is only true of three phase power. Two phase power has a phase factor of 1.414, and single phase power has no differing factor (1). These different power factors are due to the fact that generators are designed with multiple stator coils placed at angles to one another, with three phase generators having a number of poles (each end of a coil is attached to a pole that is directly opposite its opposing pole) that is a multiple of 6. Thus, the least number of coils is 3, next 6, then 9 and so on. Three phase generators generate alternating current, shown visually by a sine wave, created by the rotation of the field coils through the stator coils, each coil peaks in power (on a 6 pole generator) exactly 120 degrees of rotation before and after the next or previous coil peaks. Because of this the power output is maintained a bit more stable than a single phase alternator, and the average power output of all three coils added together is equal to the number of phases square rooted, 1.732 (sq.rt. of 3). Power output in volt-amperes (watts) from the generator is affected by this phase factor.
How does phase current cancel out each other in a 3 phase generator?
In a three-phase generator, the currents in the three phases are 120 degrees out of phase with each other. This phase displacement means that when one phase current is at its peak positive value, the other two are at lower values, thereby balancing the overall current. As a result, the sum of the currents in a balanced system is zero at any instant, which minimizes the overall neutral current and reduces losses in the system. This cancellation allows for efficient power distribution and minimizes the need for additional neutral conductors.
What is the difference between the voltages in the coils A and B in three phase generator?
I assume that you are referring to phase A and phase B? So what happened to phase C, in that case? The answer is that the magnitudes are the same, but phase B (and phase C) are displaced by 120o. The normal phase sequence (the order in which each voltage would reach its peak value) would be A-B-C.
