- #1
tommoturbo
- 33
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Hello guys have a little problem
see if anyone can help
Q the primary winding resistance is 125Ohms, Secondary is 0.7ohms calulate the transformers copper loss at full load.
now the transformers name plate is 240V 50Hz 28VA the earlier question explains it is a step down transformer delivering 12V
so primary Current = Vp/Rp 240/125 = 1.92A
now I am not sure what figures to use to calc the current in secondary winding at full load
i get values from 40A 38.4A
and using formula Full load current = VA rating/primary voltage i get .116A
i need Is value for copper loss formula
Copper loss W= Ip(sq)xRp+Is(sq)+Rs
Copper loss W= 1.92(sq)x125+Is(sq)+0.7 don't know the equation for secondary current Is
any help appreciated
see if anyone can help
Homework Statement
Q the primary winding resistance is 125Ohms, Secondary is 0.7ohms calulate the transformers copper loss at full load.
now the transformers name plate is 240V 50Hz 28VA the earlier question explains it is a step down transformer delivering 12V
Homework Equations
so primary Current = Vp/Rp 240/125 = 1.92A
now I am not sure what figures to use to calc the current in secondary winding at full load
i get values from 40A 38.4A
and using formula Full load current = VA rating/primary voltage i get .116A
i need Is value for copper loss formula
Copper loss W= Ip(sq)xRp+Is(sq)+Rs
Copper loss W= 1.92(sq)x125+Is(sq)+0.7 don't know the equation for secondary current Is
any help appreciated