Primary inductance & gap length of flyback transformer

Thread Starter

seanbein

Joined Mar 16, 2010
21
Hi all,
http://ecee.colorado.edu/copec/book/slides/Ch14slides.pdf

I am working on a CCM flyback transformer with multiple outputs, precisely 2. 1 for the high output device i will use and another to power the ic.in this book, there is only 1 output. (page 54)

1.How do I calculate the Im & Lm?Considering the Im is based upon the ratio of n2/n1 since I will have n3,my 3rd output? (page 56)
2.And also, how do I calculate the Lg gap length? (page58)

I will appreciate if someone can give me the formulas for the above mentioned.

Thank you.
 

wayneh

Joined Sep 9, 2010
16,399
You haven't said what the load draws are, but perhaps a simplifying approach might be to ignore the relatively smaller current needed to power the IC?

I suggest drawing a schematic of your particular design. You'll get better help here if folks can SEE what you're talking about.
 
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