s.madhavan


{ City } chennai
< Country > india
* Profession * director
User No # 21580
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Question { L&T, 43707 }

5. What is PMG in Alternators?


Answer

The answer above is partially correct. All AC alternators
presently manufactured are brush less type with built in
AVRs ( Automatic Voltage regultors ) Normally AVR get feed
back from load for its regulation. If the loads connected
have excessive harmonic content, feed back to AVR get
distorted and hence regulation gets affected. To avoid this
a PMG is mounted on the alternator itself which feed DC to
armature winding without reference to the load

Is This Answer Correct ?    31 Yes 15 No

Question { 6471 }

what is the formula to find out how many amps generater
takes running on full load.


Answer

Thumb rule : KVA X 1.4 = Full load current/ per phase @ 0.8 p.f

Is This Answer Correct ?    6 Yes 0 No