From: John Woodgate
Subject: Re: Inductor used in 110v to 15v
Date: Thu, 28 Nov 2002 22:34:50 +0000
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Fri, 29 Nov 2002 05:34:34 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that dataylor
wrote (in ) about 'Inductor used
in 110v to 15v', on Thu, 28 Nov 2002:
>Can you tell me which wire gauge and which wire length I will need for the
>inductor in a 110 volt input/15 volt output 30 amp
>transformer? Also, which diodes will I need to convert AC to DC?
Gauge probably, length no, because that depends on the core you use. For
30 A, you want AWG 8 or thicker. For the 110V winding, which should be
120 V in fact, your current will be a bit over 15/120 x 30 = 3.75 A That
requires a wire around AWG 16.
These figures are based on 2300 A/in2, which gives you a fairly warm but
acceptable transformer. You need a core rated for 500 VA at least. This
is big and heavy. Think 8 inches by 6 by about 3 inches thick, or a
toroid of similar dimensions.
For the diodes, go to Digikey and get a 50 V 30 A bridge rectifier.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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