Re: [femm] electromagnets

[Dave Squires <djsquires@xxxxxxxx>]

Bruno,
You take a 2D cross section. Coil segments are on the outside
with an iron core in the center.
I have attached a simple one for you. Run it and you will
see the results. This example is for FEMM 3.0.

Regards,
Dave Squires

brvusit@xxxxxxxx wrote:

> Hi all.
> I am Bruno Vusini and I am an italian engineer. I have used
> FEMM for my thesis (THANKS DAVE!!). I have used this
> WONDERFUL program for many others problems (motors,
> electromagnetic brakes...) and now...I have a problem...
> Can I model a cylindrical elecromagnet using FEMM? Is there a
> way to transform this problem in a 2D model?
> Thanks to all.
>
> Bruno.
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

[Format] = 3.0
[Frequency] = 0.000000
[Precision] = 1.000000e-008
[LengthUnits] = inches
[ProblemType] = planar
[Coordinates] = cartesian
[Comment] = "Add comments here."
[PointProps] = 0
[BdryProps] = 0
[BlockProps] = 4
<BeginBlock>
<BlockName> = "Air"
<Mu_x> = 1.000000
<Mu_y> = 1.000000
<H_c> = 0.000000
<H_cAngle> = 0.000000
<J_re> = 0.000000
<J_im> = 0.000000
<Sigma> = 0.000000
<d_lam> = 0.000000
<Phi_h> = 0.000000
<LamType> = 0
<LamFill> = 1.000000
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "Silicon Core Iron"
<Mu_x> = 7000.000000
<Mu_y> = 7000.000000
<H_c> = 0.000000
<H_cAngle> = 0.000000
<J_re> = 0.000000
<J_im> = 0.000000
<Sigma> = 3.000000
<d_lam> = 0.000000
<Phi_h> = 0.000000
<LamType> = 0
<LamFill> = 1.000000
<BHPoints> = 35
0.000000	0.000000
0.076138	27.383404
0.142890	31.395700
0.217980	36.490250
0.305520	42.403651
0.393040	48.938553
0.484670	55.704230
0.580450	63.402555
0.684550	72.654232
0.776130	81.009866
0.855280	90.965008
0.917770	100.076628
0.976140	110.875291
1.051100	124.506912
1.126200	144.711632
1.193000	168.210859
1.251500	195.553679
1.305800	225.793118
1.347700	260.751501
1.393800	309.508618
1.431600	367.417144
1.469400	436.172079
1.499000	525.028284
1.524400	636.388998
1.541400	745.354429
1.562600	897.315569
1.583900	1095.145163
1.609500	1402.632513
1.626700	1771.951559
1.648000	2223.076245
1.665200	2713.512202
1.682300	3335.012255
1.703600	4042.615132
1.720600	4767.565898
1.737700	5779.393448
<EndBlock>
<BeginBlock>
<BlockName> = "coil-plus"
<Mu_x> = 1.000000
<Mu_y> = 1.000000
<H_c> = 0.000000
<H_cAngle> = 0.000000
<J_re> = 1.612000
<J_im> = 0.000000
<Sigma> = 0.000000
<d_lam> = 0.000000
<Phi_h> = 0.000000
<LamType> = 0
<LamFill> = 1.000000
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "coil-minus"
<Mu_x> = 1.000000
<Mu_y> = 1.000000
<H_c> = 0.000000
<H_cAngle> = 0.000000
<J_re> = -1.612000
<J_im> = 0.000000
<Sigma> = 0.000000
<d_lam> = 0.000000
<Phi_h> = 0.000000
<LamType> = 0
<LamFill> = 1.000000
<BHPoints> = 0
<EndBlock>
[CircuitProps] = 0
[NumPoints] = 16
2.000000	3.500000	0	0
2.000000	2.500000	0	0
5.250000	3.500000	0	0
5.250000	2.500000	0	0
2.250000	4.000000	0	0
2.250000	2.000000	0	0
5.000000	4.000000	0	0
5.000000	2.000000	0	0
5.000000	2.500000	0	0
2.250000	2.500000	0	0
5.000000	3.500000	0	0
2.250000	3.500000	0	0
-0.750000	6.250000	0	0
8.000000	6.250000	0	0
8.000000	-0.250000	0	0
-0.750000	-0.250000	0	0
[NumSegments] = 18
4	6	-1	0	0	0
6	10	-1	0	0	0
4	11	-1	0	0	0
7	5	-1	0	0	0
8	7	-1	0	0	0
9	5	-1	0	0	0
1	9	-1	0	0	0
9	8	-1	0	0	0
8	3	-1	0	0	0
2	3	-1	0	0	0
2	10	-1	0	0	0
10	11	-1	0	0	0
11	0	-1	0	0	0
0	1	-1	0	0	0
12	15	-1	0	0	0
12	13	-1	0	0	0
13	14	-1	0	0	0
14	15	-1	0	0	0
[NumArcSegments] = 0
[NumHoles] = 0
[NumBlockLabels] = 4
-0.250000	6.000000	1	1.000000e-001	0	0.000000	0
3.500000	3.750000	3	1.000000e-001	0	0.000000	0
3.500000	2.250000	4	1.000000e-001	0	0.000000	0
3.500000	3.000000	2	1.000000e-001	0	0.000000	0