Interested to Buy Any Domain ? << Click Here >> for more details...
Why DC excitation is used for alternators? Why cant it be AC?
- 35 Answers
- 77152 Views
- ABB, Ace Info, Alstom, Shalivahana Power, I also Faced
- E-Mail Answers
Answer Posted / anish
i think its b'coz we need constant poles at the ends of the
field(i.e. rotor) so as to lock the rotor wid the rotating
magnetic field.hence DC is used.if AC is used it ll create
NORTH n SOUTH poles alternately on each side of the rotor
| Is This Answer Correct ? | 78 Yes | 26 No |
Post New Answer View All Answers
WHAT IS THE CURRENT CARRYING CAPACITY OF 2.5/3 CORE HI TUFF CABLE,WILL IT SAFLEY CARRY 8.6 AMPS OVER 120 METRES,CAN YOU ALSO ANSWER WITH FORMULA FOR WORKINGS OUT ,THANK YOU 3RDYR APPRENTICE.
What fomula is used to calculate: 1. rated frequency withstand voltage, and 2. rated lightning impulse withstand voltage.
what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero
What is Tachometer used to measure?
What is the use for cable entry in control room?
The D.C. spark test is applicable to single conductor cable & assemblies of insulated single conductor cables without insulation shield,metallic sheath or metalic armor?
HOW TO CALCULATE THE VT SIZING?
What is the automatic voltage regulator with servomotor?
How shall i select the value of capacitor or inductor in a system?
what is fault level of power system ?
HOW TO WRITE A QUENTION ANSWER? I MEAN SHORT OR LENGHTHY ? OR FROM THE BOOK AS BOOK..... SOME TIME WE GIVE A ANS FROM THE BOOK AS LIKE BOOK ND WE GET MINIMUM 60% MARKS OR MORE THEN....... THEN HOW TO FILL THE Q-PAPER?
i want to know d working mechanism of tafe tractors next i like to know d engine type of apache bighs can anyone help me
How to measure size of cable on a given load
Why you are switching off arc protection mcb when you are taking shutdown for lv board.
what is meant by moulded case circuit breaker ?
