Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...


Why dc voltage used to excite alternator field in stead of ac?

Answers were Sorted based on User's Feedback



Why dc voltage used to excite alternator field in stead of ac?..

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

Why dc voltage used to excite alternator field in stead of ac?..

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

Why dc voltage used to excite alternator field in stead of ac?..

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

Why dc voltage used to excite alternator field in stead of ac?..

Answer / haytham hashim

coz dc can be controlled in awide range but cann't be

Is This Answer Correct ?    0 Yes 3 No

Post New Answer

More Electrical Engineering Interview Questions

definition of transformer

10 Answers  


Should transformer earthing pit, to be connect to earthing mat in Substation

4 Answers  


Why only mesh earthing is used in G.S.S.?

2 Answers  


what is the pre commissioning test to be carried out on LT power panel at site?

1 Answers  


If SFU is Switch Fuse Unit, What is the expansion for FSHF in Electrical Engineering?

0 Answers  


whats the advandage of PMG in alternator?

2 Answers  


what do u mean by starting torque? how it should be for a good motor? what is the relation between starting torque and power factor? What is the relation between efficiency and starting torque?

2 Answers  


Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,


Difference between On Line capacitor and Station Type capacitor.

0 Answers  


During the main stator winding insulation testing (phase to ground)of 11kv alternator (Lerysomer) i found 0 and resistance with multimeter and found 20 killo ohm while the power cables are connected both end (Generator & VCB). In VCB PT (Potential transformer) are connected. Please any body explain that method of insulation is correct or not? also describe of PT connections

1 Answers   Private,


what is technical diffrence between table fan and ceiling fan

5 Answers  


what is tpmo switch

3 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5086)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4453)
  • Electrical Engineering Interview Questions Electrical Engineering (16638)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)