what is rotatng magnetic field in case of three or multiple
phase alternating current machines???

Answer Posted / rajesh

when a 3 phase supply is passed into stator . the plot of
voltage vs time will give rise to resultant voltage .
this is then converted to magnetic field due to faradays law
. when u plot again u will get the resultant current . The
rotating magnetic field ( also magnetizing magnetic field )
has voltage current char similar to 3 phase supply . the rmf
is hypothetical concept to link field between stator and rotor

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV

1745


how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

1369


A system absorbs 100 k J of heat and the increase in its internal energy is 100 kJ; the work done is

763


What are the two basic types of transformers?

616


what is mean by dry frequency

1935






in star-delta tranformer,if the input of star connection is 400/7v 3 kva then what is the output of delta connection?

1706


what kvrah y we need to take the readind of that

1560


i have applied for junior engineer 2 c&w for Guwahati RRB please send me last five year question paper

1591


what is the difference between b c d curves on mcb

1340


how to extend relay operating timing in 24V dc relay card (without using Timer )

1462


Explain in details how you would react to an unexpected incident when your supervisor or manager is not around to give instructions?

7308


How to derive detailed design of Suitable bus Bar for 100A for 6.6KV?

1442


What are the material used for inductance coil?

693


i ha done my 10th with 71% ,ITI with 81% 11th with 75% 12th 43% apprentiship with 71% in SAT i secure 1390 ,TOEFL 27 i was refused four times and in all me interview visa officar told that i am not Qualify for study in USA but i completed my 12th yes i got low persentage in my 12th but i seen to much student they already got visa with them 3 or 4 backlocs so why they are refused me ?

3060


In electrical what is earth(ground)connection, wht is the importance of it, why it is recomended to maitain below 3VAC between Neutral and earthspecially in PLC used machines?

1751