Between rotating armature type and rotating field type
arrangements which one is adopted for large rated
alternators and DC generators.Why there is difference in
Answer / iamdon
Large rated alternators are of rotating field type where as
DC genertors are of rotating armature type.The basic reason
behind different choice of arrangements is governed by
INSULATION in the case of alternator and
COMMUTATION in the case of DC generator.
In the case of large alternators, more insulation is
required for large voltage generated in armature
winding.Being armature placed on stator,it is easier to
provide insulation for the stationary armature winding.Also
armature is placed on radially outer side, so we can put
more and more insulation(if required for higher voltage)in
the space avaliable.
In the case of DC generators,AC is generated in the
armature winding which is converted into DC, by means of
mechanical rectifier i.e, commutator.It is convenient to
adopt rotating commutator and fixed brush ararrangement for
collecting DC through brushes.So we need to place armature
winding on the rotor.
|Is This Answer Correct ?||10 Yes||2 No|
What is the maxvoltage drop allowed at any healthy joint at full load ?
What is ill conditioned power system?
Whats the difference btwn a latch, port,data bus buffer? Do they all not hold data in d flip flops??
what is meant by PU value ? anyone can you explain briefly to me ?
Why compensation is necessary in feedback control system?
a motor's measured current is 45amp,whereas the rated current is 38 amps but still it is running ,how?
howmany electrician should maintain for a 1000 kva used plant... in kerala..
how much percentage set in transformer diffrencial relay
How can i learn to programme every VFD. Or is there any typical study to understand VFD programming.
We are having a 2000KVA DG set. It trips with Over speed and Engne Hot when the mahine is stopped in full speed. How shall I analyse the block load and reverse power.Is the problem related to power factor. The machine which runs on this DG is having all Synchronous motors with incividual Drives.
The ohm is the unit of:(a) Charge(b) Resistance(c) Power(d) Current
Why carbon brushes are used in motors?