[sdiy] switched mode PSU design

[Tim Parkhurst]

On 8/11/05, fmg <eqys at iposadas.com.ar> wrote:
> Tim Parkhurst wrote:
> >
> > What I'm looking for is info on winding the inductors. 
> 
> Your best reference for coil making is the ARRL Handbook (the older the
> edition the better), also good info can be found in most ham websites.
> A fast google:
> 
> http://www.qsl.net/yo5ofh/doc/radio%20calculs.htm
> 
> That's the most pop formulas for radio. Personally I prefer:
> 
> L= mu * 1.257 * ((n^2 * a)/(10^8 * l))
> 
> [L=Henrys, mu=core type (1=air 30=typical for ferrite rods), n=number of
> turns, a=core area, l=coil lenght, all measures in cm] ... which gave me
> good results throu the years.
> 
> Notice that these formulas are gross simple and intended only to be used
> in the bench, you can success or fail, depending on the application.
> (don't use them to make your new particle_accelerator_solder_gun... ;-)
> 
> Regards,
> 
> Fabio
> .

Excellent! Thank you very much. That's a good reference site by the
way. It includes other formulas for Rs and Cs and even a 'heatsink
evaluator' that I was looking for (work related). I guess I'll have to
look elsewhere to get the formulas for my new particle accelerator
solder gun (is there an evilgenius.com or worlddomination.com? How
about supervillian.com?) Anyway, thanks again!


Tim (and just where do you hire good henchmen these days?) Servo
-- 
"Imagination is more important than knowledge." - Albert Einstein