I am a little lost. How do I calculate the size of the ferrite core required to make a transformer for a certain amount of output power ?
You need programm excellentIT
http://cxem.net/software/excellentIT.php
http://forum.cxem.net/index.php?/topic/70885-%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B-%D1%80%D0%B0%D1%81%D1%87%D0%B5%D1%82%D0%B0-%D1%82%D1%80%D0%B0%D0%BD%D1%81%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%BE%D1%80%D0%BE%D0%B2-%D0%B8-%D0%B4%D1%80%D0%BE%D1%81%D1%81%D0%B5%D0%BB%D0%B5%D0%B9/
Thanks for the link but I was trying to get the formula for calculating the required ferrite core size using a certain input frequency etc.. I want to be able to do my own calculations.
I was holding off to let other engineers answer this but It seems there are not many transformer design engineers left these days, this is how I choose ferrite core size. Calculate your transformer design using Kg approach equations from a transformer design handbook. Pick a core size you think will suit your application. Now get your datasheet for instance ferrox cube datasheet. Now punch in datasheet values in to Kg equation below. This will let you know if the core you have chosen is of sufficient size for your transformer design equations. If it is not chose a larger core and recalculate.
Good luck
Thank you so much ! xxx
Please share this Excel file.
Hello Saber,
I am not sure I still have this spreadsheet. I would have to check when I get back to my lab. In any case different transformer designs require different design equations such as power transformer, flyback transformer, current transformer etc... You would be best to make your own spreadsheet for your particular design. I would suggest reading Transformer and Inductor Design Handbook Third Edition by Colonel WM. T. McLyman. Search this book it is on PDF format.
Hello,
Thanks for your reply.
Please be aware that toroid core losses are high (even powder core) compared to laminated core transformers and laminated core toroids. Depending on what types of conversion efficiency you are looking for, the construction is also something to consider carefully.
I'm glad to see I'm not the only one that uses Excel to do calculations like this. I was lucky enough in school to have a teacher that was fairly well versed in Excel and the functions available.
In the last couple years I've started writing VBA macros to automate a lot of calculations and data transfer exercises. If you take the time upfront to do the programming it will absolutely pay off in the end at least for repetitive tasks.
Thanks for sharing Jason.
My pleasure Steve.
Mathematics is certainly not my strongest area but excel spreadsheets helps with quick transformer design. I have however noticed the drawback of using spreadsheets to calculate things for you and that is when you have not done the equations for some time it is easy to forget the art of designing transformers manually. I cover such a wide area of engineering, by the time I go back to a certain areas I have to revise because I have forgotten certain principles.
Regards Jason
Jenya ; I went to the website and its all in Russian. Does the developer have a direct link to the software ? Also does it come in English versions ? Thank you, Steven
Hello Steven,
You wanted the English version of ExcellentIT.
https://www.eevblog.com/forum/projects/do-we-have-an-english-version-of-this-very-cool-calculator-(excellentit)/?action=dlattach;attach=361989
Thanks !
If you don't receive the email within an hour (and you've checked your Spam folder), email us as confirmation@grabcad.com.