Thanks.  First and third sources helpful.  The Amazon book isn't 
quite what I had in mind--that would be more appropriate for someone 
designing a gauss-meter, which I'm not.  What I'm trying to do is to 
develop a program to predict outcomes of magnet spacing for electro-
magnets in a motor, so my information requirement is more theoretical 
than what IEEE 130 addresses.  Unfortunately, the people who I'm 
doing the programming for have even less of a clue what the physics 
are.  *sigh*

One request to everyone who comes up with sources:  If you can 
mention just *how* you located the sources, it would help those of us 
who aren't expert in some fields to sharpen our skills a bit.  (Yah, 
I know about Encyclopedia Britannica--didn't think of it, though--but 
where did the other stuff come from?)

> On 10 Apr 2000, 11:55, [EMAIL PROTECTED] wrote:
> 
> > Speaking of magnetism, I'm writing a program that needs to include some
> > calculations on magnetic field strength for magnets in an electric
> > motor.  What I'm looking for is a college-level tutorial in the area.
> 
> Formula here:
> 
> http://www.treasure-troves.com/physics/MagneticField.html
> 
> > Since the motion is dynamic, equations that describe both the ramp up in
> > magnetic attraction, and the field collapse as the magnets are pulled
> > apart would be highly appreciated.  While there's plenty of information
> > on static fields, I've found little on dynamic fields.
> > 
> > Did anyone see anything remotely related?
> 
> It seems to me the value of the following page is it's listing of 
> textbooks:
> 
> *Magnetic Field Models*
> 
> http://www.oulu.fi/~spaceweb/textbook/bmodels.html
> 
> ~~
> 
> Check out this Britannica page:
> 
> http://www.britannica.com/bcom/eb/article/6/0,5716,108976+2,00.html
> 
> ~~
> 
> Here is a book I found at Amazon.  Costs $51.00 
> 
> IEEE Recommended Practice for Instrumentation : Specifications for
> Magnetic Flux Density and Electric Field Strength Meters-10Hz to 3Khz
> (IEEE Std 130 by Transmission and Distribution Committee of IEEE Power
> Engineering Soc 
>  
> Paperback (April 1995) 
> IEEE; ISBN: 1559375132 
> Availability: This title usually ships within 4-6 weeks. 
> 
> 
> Alan
> [EMAIL PROTECTED]
> 


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