Re: LF: Re: Static effects

To:	[email protected]
Subject:	Re: LF: Re: Static effects
From:	"Tom Boucher" <[email protected]>
Date:	Wed, 20 Jun 2001 13:55:21 +0100
In-reply-to:	<[email protected]>
Reply-to:	[email protected]
Sender:	<[email protected]>

Andy G4JNT wrote:



Use the formula    Vrms = 4.44.F.N.A.B   to calculate the Minimum turns
needed on any given core, using a B of around 0.1 Tesla for a good safety
margin.   All non-gapped ferrites designed for SMPSU transformers will have
more than enough inductance - up in the tens to hundreds of milli-henries -
when wound with enough turns to satisfy this equation.


Thanks Andy. I suspect I am not the only one on this reflector who
regards the design of cored inductors as something of a black art!

73, Tom G3OLB

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