@Shams, posting in all caps is against forum rules....please do not do it again...
This thread covers a lot of the basics of transformers'
http://www.diyaudio.com/forums/planars-exotics/161485-step-up-transformer-design.html#post2088330
It is a long thread but as lots of very good info as it explains basics of core saturation and how to go about finding such parameters.
As well as finding the turns count of the windings and ratio of a unknown transformer.
Here is a link to a calculator that might help you.
http://www.diyaudio.com/forums/planars-exotics/161485-step-up-transformer-design.html#post2089815
This one is a good one as well but I think it assumes a square wave input and I have not tried raw calculations to check it yet,
TRANSFORMERS
You need to know the core size and type of material in order to determine the number of primary turns as per frequency and primary voltage in order to design it for no saturation of the core.
There many good threads on transformer design in this forum but I don't have a compiled list for them as they can be found very easily using the search function.
Here is the calculator that I think you are looking for and it also shows the formulas as well,
Maximum Flux Density Calculator
There a few more transformer calculators that can be found on this page,
http://www.daycounter.com/SiteMap.phtml
I hope this helps you !!
jer
http://www.diyaudio.com/forums/planars-exotics/161485-step-up-transformer-design.html#post2088330
It is a long thread but as lots of very good info as it explains basics of core saturation and how to go about finding such parameters.
As well as finding the turns count of the windings and ratio of a unknown transformer.
Here is a link to a calculator that might help you.
http://www.diyaudio.com/forums/planars-exotics/161485-step-up-transformer-design.html#post2089815
This one is a good one as well but I think it assumes a square wave input and I have not tried raw calculations to check it yet,
TRANSFORMERS
You need to know the core size and type of material in order to determine the number of primary turns as per frequency and primary voltage in order to design it for no saturation of the core.
There many good threads on transformer design in this forum but I don't have a compiled list for them as they can be found very easily using the search function.
Here is the calculator that I think you are looking for and it also shows the formulas as well,
Maximum Flux Density Calculator
There a few more transformer calculators that can be found on this page,
http://www.daycounter.com/SiteMap.phtml
I hope this helps you !!
jer
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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
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
Attachments
Tony is right, look at this page: Jan's transformer article p4
Has excellent advices to follow.
Here is a 4-digit counter that I have recently built, code, eagle files, attiny2313.
metal
Has excellent advices to follow.
Here is a 4-digit counter that I have recently built, code, eagle files, attiny2313.
metal
Attachments
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this is what i use for mandrels:
An externally hosted image should be here but it was not working when we last tested it.
Thanks for quick reply from Tony & Metal
Very good suggestion & advice
Now I change my mind
I'm planning to make bigger trafo (about 600VA) but after look at
http://www.diyaudio.com/forums/power-supplies/191730-my-latest-traffo-build-28.html
then more question appear in my head
I will make bobbin for this one but the form is rectangle not square as Tony suggest.
Please tell me what the disadvantages with rectangle shape?
I want trafo that not so high that can be fit in the shorter case
Rectangle because I will use :
1 1/4 inch (32mm) center tongue stacked 6.5 inch (16.5mm)
The thickness of the laminated plate is 0.5mm & I will go bellow 1T
The bobbin I will made with "fiber" PCB
Every 1 stack complete winding, brushed with clear insulating enamel
then I have a choice to use paper or plastic for insulating.
The paper is "brown wrapping paper" &
the plastic is that what use as "laminating paper" it is can stand up to 150°C
& I guess its good to be used
but allmost Tony's trafo use paper insulator...
Again please tell me what to use here?
For finishing I'm not dip it into the insulating enamel because the winding is already insulated before & for the laminated plate just do with brush
So I'm on the right track or I must find bigger core size?
Very good suggestion & advice
Now I change my mind
I'm planning to make bigger trafo (about 600VA) but after look at
http://www.diyaudio.com/forums/power-supplies/191730-my-latest-traffo-build-28.html
then more question appear in my head
I will make bobbin for this one but the form is rectangle not square as Tony suggest.
Please tell me what the disadvantages with rectangle shape?
I want trafo that not so high that can be fit in the shorter case
Rectangle because I will use :
1 1/4 inch (32mm) center tongue stacked 6.5 inch (16.5mm)
The thickness of the laminated plate is 0.5mm & I will go bellow 1T
The bobbin I will made with "fiber" PCB
Every 1 stack complete winding, brushed with clear insulating enamel
then I have a choice to use paper or plastic for insulating.
The paper is "brown wrapping paper" &
the plastic is that what use as "laminating paper" it is can stand up to 150°C
& I guess its good to be used
but allmost Tony's trafo use paper insulator...
Again please tell me what to use here?
For finishing I'm not dip it into the insulating enamel because the winding is already insulated before & for the laminated plate just do with brush
So I'm on the right track or I must find bigger core size?
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