core air gap maked own way question

Hi I have a problem im designing a step up smps and i calculated that i need an etd39 based inductor witm 1mm air gap. But unfortunately the cores with air gap are much more expensive than the same without that gap. So my question is : Can i make a gap by putting a dielectric material between the two parts of a core?
please help me.
sorry for my english, im from Poland.
 
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Disabled Account
2010-01-17 9:20 pm
Hi I have a problem im designing a step up smps and i calculated that i need an etd39 based inductor witm 1mm air gap. But unfortunately the cores with air gap are much more expensive than the same without that gap. So my question is : Can i make a gap by putting a dielectric material between the two parts of a core?
please help me.
sorry for my english, im from Poland.
Certainly you can do that!
For a gap of 1mm total insert 0.5mm isolating sheet (plastic, paper, rubber, whatever is non-conductive) between outer legs. This is the standard method doing prototypes!