what is the purpose of the core in inductors and transformer..

[Teja.p]

hello every one ..
what is the main purpose of the core in inductors ..
what is the difference b/w with core and without core..
what is air core and iron core and ferrite core why we using these..
how to select these core..
i search about this but i am not get sufficient information...
please help meee..

 

[esp1]

hi T,
Read through this link.
**broken link removed**

E

 

[baileychic]

hello every one ..
what is the main purpose of the core in inductors ..
what is the difference b/w with core and without core..
what is air core and iron core and ferrite core why we using these..
how to select these core..
i search about this but i am not get sufficient information...
please help meee..

Core increases flux linkage in transformers.

 

[KlausST]

Hi,

Benefit: increases inductance, the coils can be smaller, it increases energy-to-volume rate,
Drawback: limited flux--> saturation, unlinearity, remanence, loss, ...especially with high frequency

It is somehow compareable with a dielctric in capacitors.

Klaus

 

[andre_luis]

An extra benefit: Confine most of the (electro)magnetic flux within a restricted volume because of its greater permeability if compared to air, therefore inducing less interference in the surroundings.

 

[treez]

if you do high frequency smps, you cannot use iron core inductors, because the core losses woudl be too high.