I present to you my program for the calculation of transformers and inductors.
One of them ( ExcellentIT(6100) ) Dimonis you presented in your theme SMPS transformer design tool.
The program ExcellentIT(7100) was corrected English translation and added standard AWG wire and the added choice of the desired diameter wire.
selector is not signed due to lack of space, but it is a tool tip.
In other programs, this selector signed "Use the desired diameter of the wire"
I speak English poorly. I use Google translator.
I would be difficult to answer your questions, but I will try.
I'm not working, I'm retired. So I will be grateful for your financial support for my work on the development of these programs .
Hello sir starichok51
I downloaded your softwareT (7100) and tried to run it the first time but does not open in my computer. Can you pleae help me to solve the problem? Thanks
Well I got curious about your inductance readings, I measured an EI 33 from an old ATX and for 155v at about 20 khz because that used to be the average frequency they used to work with. I got and inductance of around 5.6 mH for the primary winding. These ATX having a HB topology do not have any gap in the core. These usually have around 30 to 40 turns in the primary if I remember correctly. This should give you an idea of what inductance readings you should expect. The number of turns will vary with frequency, however in flyback the pulse width duty cycle, frequency , input voltage and gap size will all alter the number of turns, hence the final inductance of the primary winding.Yes, is OK. UniT UT58 series and work well. Measured known inductances and my instrument work well
I tried make another trafo on ER35/16/11 !!! (Yes, atipic dimensions) (from ATX too) and without gap 9mH.
maybe another material? Not 3C90? Remember, China cheap ATX.