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Old 4th January 2012, 07:30 PM   #1
kees52 is offline kees52  Netherlands
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Join Date: May 2009
Location: Sprang-capelle Holland.
Default Availability of EE or EDT cores.

Hi All

Here in holland I can,t get as a non business man EE cores from epcom.

Is there here a dutch or other who can give me a tip where to order these EDT59 or EE55 cores, one I need for a welder who transformator is burnt and I want now a welder inverter, I have nice schematics what works but not the trafos cores.

this is a nice thread, maybe we can get the cores more easely.

thanks
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Old 7th January 2012, 11:31 AM   #2
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Join Date: Aug 2008
Mouser.com Has ETD cores. Not sure if they ship out your way though.
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Old 7th January 2012, 03:29 PM   #3
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try coilcraft, or try the powerint.com website who advise on this.

Alternatively you tell lies that you do high volume and then they send you free samples.
RS have some for sale.

Maybe you have a small transformer winding place near you.

Find your nearest epcos distributor.

Otherwise, it is difficult.

And there is much industrial secrecy on it.
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Old 7th January 2012, 05:56 PM   #4
kees52 is offline kees52  Netherlands
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Join Date: May 2009
Location: Sprang-capelle Holland.
Quote:
Originally Posted by eem2am View Post
try coilcraft, or try the powerint.com website who advise on this.

Alternatively you tell lies that you do high volume and then they send you free samples.
RS have some for sale.

Maybe you have a small transformer winding place near you.

Find your nearest epcos distributor.

Otherwise, it is difficult.

And there is much industrial secrecy on it.
To much secrecy here, but she forget that DIY important is for future discoveries, because DIY is free info and tests, from here it is possible
to get in bussines and as the core wil be used then she can sell.

I think also the terror thread has made it difficult to get parts.

I will try. a small wind company we don,t have and the only one will not sell
on non bussiness people because se are not alowed to do.

And tell lies for the best of our planet, why not.
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Old 12th January 2012, 12:35 PM   #5
kees52 is offline kees52  Netherlands
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Join Date: May 2009
Location: Sprang-capelle Holland.
Well mouser do deliver in holland, there is even a nice lady in eindhoven who talk dutch.

above 75 euro it is free shipping.
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Old 12th January 2012, 01:41 PM   #6
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Join Date: Feb 2007
Location: south of germany
Hi,
I buy cores (EDT59, EDT49,...), copper, bobbins at:
Menting Mikroelektrik - Shop
They are very quick, it's cheap.
Don't know if they send holland.
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Old 12th January 2012, 02:07 PM   #7
kees52 is offline kees52  Netherlands
diyAudio Member
 
Join Date: May 2009
Location: Sprang-capelle Holland.
Thanks

I try it.

I have question about gapped or not gapped core, when need I gapped and when not, it lowers the al of the core so I can think with high frequenties the windings become to low, and so with gap you can decrease the all and so more windings.

for example a 5 to 170 ampere welding inverter don,t use a gap, you see with computer supply with edt cores a small gap of 0.5 mm.

Nice to learn some of the smps before I go blow myself to walhalla.

here is a site with calculation software.

Design of switch power supplies
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