Why dc voltage used to excite alternator field in stead of ac?
Answers were Sorted based on User's Feedback
Answer / sankaranarayanan
field flux produced by dc supply is constant where as in ac
supply will not give a constant field flux
So, alternator output will not constant.
| Is This Answer Correct ? | 4 Yes | 2 No |
Answer / kj
When a wire is moved through a magnetic field it produces a
voltage across the wire. To produce an ac output the wire
must move past a north pole and then a south pole in
continuing sequence.
A dc voltage on the field will maintain the poles with the
same polarity. An ac voltage will cause the polarity to
reverse 100 times a second (50Hz) and this will not be
usable for generating the ac output voltage.
Usually an ac voltage is used but it is rectified either as
half wave or full wave before being put into the field.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / mohamed abd el-raouf
so the magnetic field of the rotor can connect with the magnetic field of the stator
| Is This Answer Correct ? | 0 Yes | 1 No |
Answer / haytham hashim
coz dc can be controlled in awide range but cann't be
| Is This Answer Correct ? | 0 Yes | 3 No |
What is the difference between AMF panel and DG Synchronization panel? please define the working of both the panels?
what does kirlosker deals with?
if any one phase of the 11kv/415v distribution transformer not delivering the supply voltage what will happen
Sir I hv to fix 20 ton ac how much electrical power need apply?
What is time response of the control system?
what is meant by trivector meter?
There is any especial requirement for motor to drive through with VFD?
what are the oils used in transformers cooling? n which type transformer is used in power systems?
How is Grounding or Earthing achieved in Planes and Automobiles?
If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, but why any one or both Ngr in line? Ngr is use for which purpose?
how to claculate the ups load in KVA pls give the if any fourmoul?
are there rmu for 3 transformer?
Civil Engineering (5086)
Mechanical Engineering (4453)
Electrical Engineering (16638)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)