Why DC excitation is used for alternators? Why cant it be AC?
Answer Posted / sangeetha.np
When it is of Ac it behaves like a transformer by means of
the induction principle as there are two windings ie
armature and field windings. So in order to produce a
constant mag field we go for DC.
| Is This Answer Correct ? | 11 Yes | 3 No |
Post New Answer View All Answers
what is alluminium arm in ab conductors
What are the applications of autotransformers?
In hydel power plants, L.A's, S.C's are placed inside the control panel boards. what is the purpose? [already the total body was earthed to ground.]
What do you mean by Frame 5 Gas Turbine as well as Mark II.
Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere
How to reduce -234126219.6403 MVAr generation and by what?
Whats the difference btwn a latch, port,data bus buffer? Do they all not hold data in d flip flops??
What do you mean by lighting transformer?
what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights
What is the function of the generator exciter?
How to calculate the volumetric capacity of a oxygen & Nitrogen gas Cylinder if pressure is 145 kg/cm2 & water capacity of cylinder is 67 liters.
why and how current drawn by battery charger depends upon the altitude where it is located?
If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?
Describe the control mechanism of missile launcher???
There are different classes of protections in power plants.class a,b,c are clear..is there any class d and e r there..and elaborate class b protection.