Iron Core Transformer Formula
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 3rd October 2012, 07:26 AM #101 shams diyAudio Member   Join Date: Oct 2012 HEY, Can anyone please tell me what is the formula for finding priamary and secondory turns for a small ferrite core transformer where 220vac will be the input of priamary side and 12vac will be the output of secondory side...or can we use the EP/ES=NP/NS formula?? please help me...
 3rd October 2012, 09:45 AM #102 TonyTecson   diyAudio Moderator     Join Date: May 2003 Location: Palatiw, Pasig City @Shams, posting in all caps is against forum rules....please do not do it again... __________________ planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B
 3rd October 2012, 09:56 AM #103 sofaspud   diyAudio Member     Join Date: Nov 2005 Location: San Antonio re: EP/ES=NP/NS This formula won't provide the number of turns, only the turns ratio. Determining the actual number of turns is much more involved - physically counting them or heady calculations from wire size. __________________ It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
TonyTecson
diyAudio Moderator

Join Date: May 2003
Location: Palatiw, Pasig City
Quote:
 Originally Posted by shams HEY, Can anyone please tell me what is the formula for finding priamary and secondory turns for a small ferrite core transformer where 220vac will be the input of priamary side and 12vac will be the output of secondory side...or can we use the EP/ES=NP/NS formula?? please help me...
ferrite core, means you are looking at smps, out of scope of this thread...
__________________
planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B

 3rd October 2012, 02:34 PM #105 shams diyAudio Member   Join Date: Oct 2012 so friends....what should i do please tell me how will i got to know about the ferrite core transformer,the priamary & secondory turns...everything!! related to it...... pleaseeeeee help its very very urgent!!
 3rd October 2012, 05:06 PM #107 JOHN BALI   diyAudio Member     Join Date: Jun 2010 Location: Near the Mountain Hi, something new here Back on iron trafo... I think I must finish my trafo build as soon as possible... But I'm not sure yet maybe I'll show what I've been done so far I will need suggestion, to continue or start over __________________ Thank you, I wish you happy peace & G B U
 3rd October 2012, 06:43 PM #108 donnyab diyAudio Member   Join Date: May 2011 rikkit, do you have any further info on that pdf file not getting any hits for that either google or texas instruments thanks
JOHN BALI
diyAudio Member

Join Date: Jun 2010
Location: Near the Mountain
I think this is not good

This will be 300VA trafo that I'm going to make or maybe not.
I'm just not so confidence is this okay or not
I thing ask some suggestion here is a good way
I just use what I see around he..he... ,
latter
I found better "things" to use as
inter layer windings insulation
also found good trafo as a reference

here 2 pictures
what do you think, give it a try or
I must start again with better way?

Any comment greatly appreciated
Attached Images
 Base.jpg (103.5 KB, 127 views) Primary almost done.jpg (129.7 KB, 117 views)
__________________
Thank you, I wish you happy
peace & G B U

 4th October 2012, 06:00 AM #110 TonyTecson   diyAudio Moderator     Join Date: May 2003 Location: Palatiw, Pasig City ^yeah, why not? if i were you i'd make a wooden mandrel with which to put the bobbin into, this way you can pound on the windings using wooden mallet or a bench vise to make sure your built up coil fits the iron core.... __________________ planet10 needs your help: Let's help Ruth and Dave...http://www.diyaudio.com/forums/plane...ml#post5010547[B

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