Yes, that is what I thought also, Jeff. If the flux density doesn't
increase under load, then how is energy transferred from
primary to secondary?
Mike, W4EF.....................
----- Original Message -----
From: "jeff millar" <wa1hco@adelphia.net>
To: <W8JI@contesting.com>; "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>;
<amps@contesting.com>
Sent: Monday, May 06, 2002 7:22 PM
Subject: Re: [Amps] Rectifier diode strings
> Whoa...flux density comes from Ampere-Turns, not Volt turns.
>
> But, overall an excellent discussion.
>
> jeff, wa1hco
>
> ----- Original Message -----
> From: "Tom Rauch" <w8ji@contesting.com>
> To: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; <amps@contesting.com>
> Sent: Monday, May 06, 2002 2:12 PM
> Subject: Re: [Amps] Rectifier diode strings
>
>
> > > Unless I misunderstood Tom's point about mains transformers saturating
> > > at 1.3-1.4 times normal primary voltage, surely that would only apply
> > > at full load? The main risk to the rectifiers is more likely to be
> > > during RX periods, when the load is at a minimum but the DC voltage is
> > > at a maximum. I don't believe the saturation argument would apply
> > > then, would it?
> >
> > Yes, saturation applies. Remember what it is. The core can only
> > obtain a certain flux density, and that flux density relates only to
> > the volt-turn of the magnetizing winding. Flux density is the same at
> > full load or no load, ignoring small differences caused by resistance
> > in the primary and power mains.
>
>
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