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Question
why crgo core is used in transformers?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
C.R.G.O (Cold-rolled grain-oriented sheet steel) is used for reducing the core losses in transformers.
Each type of steel has "grains" which consist of "domains". These "domains" are nothing but electrical charges oriented in any random direction.

Core loss= Hysteresis + Eddy Current Loss

Reduction of hysteresis loss:
(1)The size of the "grains" in a CRGO steel are purposely "grown" & made bigger & are about 10 times the size of the grains in regular steel.
(2)The grains in CRGO steels are all aligned almost parallel to the direction of rolling of the steel(i.e the length of the steel).

Reduction of eddy current loss:
A special carlite insulation coating on the steel being done so as to reduce the eddy current loss.
 
Is This Answer Correct ?    30 Yes 3 No
Guest
 
Answer
# 2
crgo is cold rolled grain oriented........steel used 4 tf is
cold rolled because it allows a much higher flux density of
around 1.8wb/m2 as compared to hot rolled steel...nd
therefore making it possible 2 minimize the core material nd
hence d core losses ..............
 
Is This Answer Correct ?    17 Yes 0 No
Divya Pundir
 
 
 
Answer
# 3
this material when magnetized in the rolling direction,has
low core loss and high permeability.
 
Is This Answer Correct ?    13 Yes 3 No
Manoj
 
Answer
# 4
Less of the loss 
Is This Answer Correct ?    13 Yes 7 No
Chetan
 
Answer
# 5
In order to improve the efficiency of the transformer along
with IR loss minimisation, Regards, V.G.Praveen
 
Is This Answer Correct ?    5 Yes 13 No
V.g.praveen
 

 
 
 
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