Ian,
Contact me off line and I will share with you the SW tools (free on the
internet) that I use to do these calculations.
The first is an antiquated tool that runs on DOS called Computer Calculus
4.0, or CC4 I like it because it's powerful but easy to learn and retain.
The second is a 2D finite element analysis program called femm that is
located at
http://femm.berlios.de/
When you use the SW in asymmetric analysis you get true 3D values, so it's
very powerful.
You can use the program for plotting the B field over whatever effective
area of interest you're after.
- Robert -
Robert A. Macy, PE [email protected]
408 286 3985 fx 408 297 9121
AJM International Electronics Consultants
101 E San Fernando, Suite 402
San Jose, CA 95112
From: "Gordon,Ian" <[email protected]>
To: "'IEEE EMC-PSTC GROUP'" <[email protected]>
Sent: Thursday, January 23, 2003 7:15 AM
Subject: CALIBRATION AND CONSTRUCTION OF HELMHOLTZ COILS
>
> All
> I would like to construct a Helmholtz coil to perform magnetic field
> immunity testing at DC frequencies and thus simulate the effect of a
> permanent magnet. There are some details on construction in EN61000-4-8
> which details power frequency magnetic field immunity testing within the
> scope of the EMC directive. However the fields referred to are measured in
> A/m, whereas I need a field of, for example, 5mTesla.
> Can anybody advise me as to how to construct such a coil with a test
volume
> of 0.5 x 0.5 x 0.5m and a field of 5mTesla?
> Thanks
> Ian Gordon
>
>
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