RE: question (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: Steven Roys <sroys@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Tue, 18 Apr 2006 8:48:1 -0700
From: David Dameron <ddameron@xxxxxxxxxxxxx>
To: hvlist <hvlist@xxxxxxxxxx>, High Voltage list <hvlist@xxxxxxxxxx>
Subject: RE: question (fwd)


Hi Peter,

It depends on the individual magnet operating point, but the fields 
increase, but not as much as the "batteries in series" example. Remember 
inside  a permanent magnet the B and H fields have opposite directions, the 
magnet is in quad. 2 of the B-H plot. I think he extra magnets fields are moving 
the magnet operating point toward H=0, similar to what a "keeper" does.

-Dave D.


 

---------- Forwarded message ----------

Date: Thu, 13 Apr 2006 10:49:53 -0700

From: Peter Lawrence 

To: High Voltage list  hvlist@xxxxxxxxxx  

Subject: question

 

 

I hope this list doesn't mind forays into electro-and-magnetics

(hey, how else do we get HV!).

 

a question came up in a discussion with a co-worker, what is the

final magnetic field strength on the surface of a disk magnet

after stacking another one (or more) under it ?

 

in other words do magnets "add" like batteries connected in series ?

 

I'm guessing that they do, until the field strength reaches the

saturation level for the material, then it stays constant...

 

 

another possibility, the field strength stays the same, but the

pile's coercive strength increases ?

 

 

or some combination of the above, or something else altogether ?

 

 

-Pete Lawrence.