Interested to Buy Any Domain ? << Click Here >> for more details...
Why DC excitation is used for alternators? Why cant it be AC?
- 35 Answers
- 78127 Views
- ABB, Ace Info, Alstom, Shalivahana Power, I also Faced
- E-Mail Answers
Answer Posted / vknt
if we are using DC supply for field it will create the
rotating magnetic field as the rotor rotates. so there will
be a relative speed between field and stator coil to produce
voltage.
if we are using AC supply for field this will create
alternating field in rotor. as the rotor and field both are
rotating the net speed of the field will be zero i.e there
will not be a relative speed between filed and stator. so
voltage will not be produced in stator.
| Is This Answer Correct ? | 3 Yes | 11 No |
Post New Answer View All Answers
WHY TERTIARY OF POWER TRANSFORMERS IS LOADED WITH EQUIPMENTS LIKE CT,PT,ISOLATOR AND CB
Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?
What is cross over distortion? How it can be eliminated?
Dear Respected sir how to test ABB REX521 protection relay by relay tester.
what is differnce btwen lll and lllg faults
What is meant by short-pitched winding?
what is the voltage regulation for unity and zero power factor?
How to address the servo drive for motor
What is the function of capacitor in electrical circuits?
An impedance of 100 ohms resistance and an unknown inductance is connected across the capacitor. The resulting impedance is a pure resistance of 500 ohms ifω = 10^5 rad/sec. calculate the values of inductor and capacitor.
If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?
what is the calculation involved to design the heater to heat 10KL of water in temperature control unit?
What are the causes of having an rmu explode after installation? And how do u treat the bushings of an rmu?
Inductor and capacitor........power in one phase and ...... in it another phase.
please send the last 5 years {{{JUNIOR ENGINEER - ELECTICAL, ELECTRONICS RRB CHENNAI and secundrabad}}} TECHNICAL question papers TO MY EMAIL ID dinesh100701@gmail.com
