An alternator operates on the same fundamental principle of electromagnetic induction as a DC generator i.e., when the flux linking a conductor changes, an e.m.f. is induced in the conductor. Like a DC generator, an alternator also has an armature winding and a field winding. But there is one important difference between the two. In a DC generator, the armature winding is … [Read more...] about 4 Advantages of Stationary Armature in Alternator
Alternator
Objective Questions on Alternators | Part 2
Part 1Part 2Part 3Part 4Part 5Part 1 Part 2 Part 3 Part 4 Part 516. A winding is having number of slots is equal to number of poles, then this winding is called(A) concentrated winding.(B) short pitch winding.(C) full pitch winding.(D) distributed winding. Check Answer A 17. Symmetrical waveform does not … [Read more...] about Objective Questions on Alternators | Part 2
Armature Reaction in Alternator
We have studied the effect of armature reaction on the flux in the air gap in case of DC Motor and DC Generator in previous articles. Similarly armature reaction has effect on the air gap flux in case of synchronous machines also. We know that when current flows through armature conductors it gives rise to magnetic flux encircling these conductors and hence … [Read more...] about Armature Reaction in Alternator
Objective Questions on Alternator | Part 1
Part 1Part 2Part 3Part 4Part 51. In an alternator, voltage drops occurs in(A) armature resistance only(B) armature resistance and leakage reactance(C) armature resistance, leakage reactance and armature reaction(D) armature resistance, leakage reactance, armature reaction and earth connections.Get Answer C 2. The magnitude of various voltage drops that occur in an … [Read more...] about Objective Questions on Alternator | Part 1
Characteristics of Separately Excited DC Generators
In a separately excited dc generator, the field coils are energized from an independent source. The disadvantage of a separately excited DC generator is the same that we require an external DC source for excitation. But since the output voltage may be controlled more easily and over a wide range (from zero to a maximum), this type of excitation finds many … [Read more...] about Characteristics of Separately Excited DC Generators