In alternator generally we give DC voltage to field of
alternator but field (excitor)produce Ac & converts into DC
by rotating rectifier(RR ) then fed to rotor .my question
is why we cannot give dc voltage directly to rotor instead
of Excitor & RR ?
Answer / arun pandey
First-Voltage regulation of AC is easier than DC which is
controlled and regulared by Automatic Voltage Regulator.
Second-DC Power given to alternator for field excitation
having very high current,for feeding this type of supply
system size and cost of exciter becomes excessive high and
size of Automatic Voltage Regulator and its heat
dessipation will cost also that why it become in efficient
give dc voltage directly to rotor instead
of Excitor & RR ?
Arun Pandey
Is This Answer Correct ? | 2 Yes | 0 No |
What are the tests to be taken on a transformer and generator?
working principle of current sensing relay? how its work?
what do you know about electrical
what are the method of testing of transformer??
what is KWH
If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?
0 Answers REM Electromech Pvt Ltd,
How many safety of Disel Generator
how to calculate insulation level of transformer?
bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.
which type of capacitors using in single phase motors
What is meant by sotf,lbb,power swing,pole discrepency,auto reclose?
1 Answers Bunge, Electrical, Omega, TCS, TNEB Tamil Nadu Electricity Board,
what would happen nif we increase or decrease the capacitor of a flood light.