Re: Over Saturation?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "gtyler" <gtyler-at-drummond-dot-org.za> 

It is only the "magnetising" portion of the current that can cause
saturation, i.e. you can divide the current into 1 conponent that is the
reflected load current, and the magnetising current which is there even
if there is no load.

George
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, January 29, 2004 5:06 PM
Subject: RE: Over Saturation?


 > Original poster: "Randy & Lori" <rburney6-at-comcast-dot-net>
 >
 > George
 >
 > That makes perfect sense.  (Working on the visualization here) Current
 > in the secondary reduces the inductive value of the transformer as a
 > whole, which in turn causes higher currents in the primary for the
same
 > applied voltage?  Is this linier, or is there a point where there is a
 > "run away" current situation; if so is this what people refer to as
 > "Over Saturated"?
 >
 > Randy
 > Savannah, GA
 >
 > -----Original Message-----
 > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 > Sent: Thursday, January 29, 2004 1:35 AM
 > To: tesla-at-pupman-dot-com
 > Subject: Re: Over Saturation?
 >
 > Original poster: "gtyler" <gtyler-at-drummond-dot-org.za>
 >
 > Flux density goes up with increased voltage, but the series resistance
 > of the primary means that as you increase the load on the secondary
the
 > voltage across the actual primary decreases causing a drop in flux
 > density. You really need to draw the equivalent cct to see what
happens,
 > but it takes me ages to draw circuits in emails and I have to go fight
 > with the taxman today!
 >
 > George
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Thursday, January 29, 2004 2:15 AM
 > Subject: RE: Over Saturation?
 >
 >
 >   > Original poster: "Randy & Lori" <rburney6-at-comcast-dot-net>
 >   >
 >   > I knew there had to be some math in there somewhere.  So, as I
 >   > understand it, in most cases where I have read the term "Over
 > Saturate",
 >   > they really mean that they are bringing the core out of
Saturation?
 > If
 >   > voltage is increased, then current will obviously follow, and with
 >   > increased current comes increased magnetism, but saturation goes
 > down?
 >   > I kept thing of "Saturation" as a term pertaining to magnetism; do
I
 >   > have it backwards?  I really do appreciate the response, but until
I
 > get
 >   > the "Visualization", the math doesn't help.  You mentioned
 > volt-second??
 >   >
 >   > Randy
 >   > Savannah, GA
 >   >
 >   > -----Original Message-----
 >   > From: Tesla list [mailto:tesla-at-pupman-dot-com]
 >   > Sent: Wednesday, January 28, 2004 10:11 AM
 >   > To: tesla-at-pupman-dot-com
 >   > Subject: Re: Over Saturation?
 >   >
 >   > Original poster: "gtyler" <gtyler-at-drummond-dot-org.za>
 >   >
 >   > Not too much of a reflection on you, any people involved in
 > electronic
 >   > design don't understand this one either! Often people ask "how
much
 > can
 >   > I load it before it will will saturate?" or something similar, but
 >   > increasing the load actually moves a transformer further from
 >   > saturation. Increasing the supply voltage or reducing the
frequency
 >   > causes saturation as it is the volt-second product that is the
 > critical
 >   > issue.
 >   >
 >   > The formula n/v =1/ 4.44BFA tells you what the flux density is.(B)
 >   >
 >   > F= frequecy
 >   > a= Area of the core in Metres
 >   > n/v = turns per volt
 >   >
 >   > George Tyler
 >   >
 >   >
 >   > ----- Original Message -----
 >   > From: "Tesla list" <tesla-at-pupman-dot-com>
 >   > To: <tesla-at-pupman-dot-com>
 >   > Sent: Wednesday, January 28, 2004 1:52 AM
 >   > Subject: Re: Over Saturation?
 >   >
 >   >
 >   >   > Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
 >   >   >
 >   >   > simplest way I can think of over saturation is as excess
 > magnetising
 >   > of the
 >   >   > core. Air cores will not saturate no matter how hard you try.
 > Ferrous
 >   > ones
 >   >   > do.
 >   >   > ----- Original Message -----
 >   >   > From: "Tesla list" <tesla-at-pupman-dot-com>
 >   >   > To: <tesla-at-pupman-dot-com>
 >   >   > Sent: Tuesday, January 27, 2004 8:52 AM
 >   >   > Subject: Over Saturation?
 >   >   >
 >   >   >
 >   >   >  > Original poster: "Randy & Lori" <rburney6-at-comcast-dot-net>
 >   >   >...