why transformers not work at d.c.-
Answers were Sorted based on User's Feedback
Answer / sandeep
Transformer must not be connected to a DC Source because if
the primary winding is connected to DC Supply mains, the
flux produced will not vary but remain constant in magnitude
and therefore no EMF will be induced in secondary winding
except at the moment of switching ON. Also there will be NO
Back EMF induced in the primary winding. Therefore a heavy
current will be drawn from the supply which may result in
the burning of the winding.
In Transformer, If primary winding is connected to a source
of alternating voltage, an alternating flux is set up in the
laminated core and links with the secondary winding of the
transformer in which it produces mutually induced e.m.f
according to the principle Faraday's Laws of
Electromagnetic Induction.
Is This Answer Correct ? | 10 Yes | 1 No |
Answer / reji
the above ans is correct. moreover, the DC resistance of T is much less compared to its reactance. ie, impedance is huge . thus when T is connected to DC, a very high current will flow and the winding will certainly burn.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / aravind s
transformer works with mutual induction principle mutual induction must want change of flux or change of conductor.and transformer have non movable parts so we use principle of change of using frequency.
and also transformer works in DC (when it is pulsetting DC)
Is This Answer Correct ? | 0 Yes | 0 No |
how to calculate insulation level of transformer?
What is Meter MF if External CT Ratio is 150/1 , PT Ratio is 132/110 Meter CT Ratio is 200/1 & Meter PT Ratio is 110/1
Either It Possible a dc Motor to Run On Ac Drive [ Ex : ACS 800 , Yaskawa F7 ] If it is Possible How Pls Inform Me dinesh_elect_eng@yahoo.com
Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks
how to decide the load on secondary of the tranformer
WHAT IS MEANT BY EMBEDED SYSTEM?CAN WE CALL PLC AS EMBEDED SYSTEM?
how do you measure earth leakages in 3phase wires?
Do I need a special Transformer to put 240 VAC 3 phase into it and and get 480 VAC 3 phase out of it to run a machine? Or, do I just use an ordinary step down transformer and step up the voltage? Thanks
For R-L or R-C ckt,time constant formula is L/R and RC respectively and its unit is in sec.Pls tell me the derivation
how can we solve the RMS value of alternative Qnty is .707 , explain detail .
what is the difference between isolator and circuit breaker
Is it possible to make 0.75KW motor earthing from MCC panel by using the 1.5 SQMM, 4 core cable, means 3 core for 3 Phases & 1 core for Earth terminal?