FEMM/examples/guitar_strings.fem

175 lines
3.4 KiB
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[Format] = 4.0
[Frequency] = 0
[Precision] = 1e-008
[MinAngle] = 25
[Depth] = 5
[LengthUnits] = millimeters
[ProblemType] = planar
[Coordinates] = cartesian
[Comment] = "diametrically-magnetised NdFeB ring (inner radius 81 mm, outer 111 mm, mag along +x) with six plain steel strings (.010-.046 inch gauges) stretched across the bore. each string spans about 162 mm from the N inner-face on the left to the S inner-face on the right. flux runs through every string in +x and closes through the rest of the ring body and surrounding air."
[PointProps] = 0
[BdryProps] = 1
<BeginBdry>
<BdryName> = "A=0"
<BdryType> = 0
<A_0> = 0
<A_1> = 0
<A_2> = 0
<Phi> = 0
<c0> = 0
<c0i> = 0
<c1> = 0
<c1i> = 0
<Mu_ssd> = 0
<Sigma_ssd> = 0
<EndBdry>
[BlockProps] = 3
<BeginBlock>
<BlockName> = "Air"
<Mu_x> = 1
<Mu_y> = 1
<H_c> = 0
<H_cAngle> = 0
<J_re> = 0
<J_im> = 0
<Sigma> = 0
<d_lam> = 0
<Phi_h> = 0
<Phi_hx> = 0
<Phi_hy> = 0
<LamType> = 0
<LamFill> = 1
<NStrands> = 0
<WireD> = 0
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "NdFeB"
<Mu_x> = 1.05
<Mu_y> = 1.05
<H_c> = 915000
<H_cAngle> = 0
<J_re> = 0
<J_im> = 0
<Sigma> = 0.667
<d_lam> = 0
<Phi_h> = 0
<Phi_hx> = 0
<Phi_hy> = 0
<LamType> = 0
<LamFill> = 1
<NStrands> = 0
<WireD> = 0
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "Steel"
<Mu_x> = 2500
<Mu_y> = 2500
<H_c> = 0
<H_cAngle> = 0
<J_re> = 0
<J_im> = 0
<Sigma> = 5.8
<d_lam> = 0
<Phi_h> = 0
<Phi_hx> = 0
<Phi_hy> = 0
<LamType> = 0
<LamFill> = 1
<NStrands> = 0
<WireD> = 0
<BHPoints> = 0
<EndBlock>
[CircuitProps] = 0
[NumPoints] = 32
-150 -150 0 0
312 -150 0 0
312 150 0 0
-150 150 0 0
-30 0 0 0
81 -111 0 0
192 0 0 0
81 111 0 0
0.149 -4.920 0 0
0.192 -5.580 0 0
1.457 -15.293 0 0
1.638 -16.207 0 0
4.174 -25.666 0 0
4.574 -26.834 0 0
157.426 -26.834 0 0
157.826 -25.666 0 0
160.362 -16.207 0 0
160.543 -15.293 0 0
161.808 -5.580 0 0
161.851 -4.920 0 0
161.844 5.034 0 0
161.816 5.466 0 0
160.487 15.585 0 0
160.421 15.915 0 0
157.672 26.123 0 0
157.585 26.377 0 0
4.415 26.377 0 0
4.328 26.123 0 0
1.579 15.915 0 0
1.513 15.585 0 0
0.184 5.466 0 0
0.156 5.034 0 0
[NumSegments] = 16
0 1 -1 1 0 0
1 2 -1 1 0 0
2 3 -1 1 0 0
3 0 -1 1 0 0
12 15 -1 0 0 0
13 14 -1 0 0 0
10 17 -1 0 0 0
11 16 -1 0 0 0
8 19 -1 0 0 0
9 18 -1 0 0 0
30 21 -1 0 0 0
31 20 -1 0 0 0
28 23 -1 0 0 0
29 22 -1 0 0 0
26 25 -1 0 0 0
27 24 -1 0 0 0
[NumArcSegments] = 28
4 5 90 10 0 0 0
5 6 90 10 0 0 0
6 7 90 10 0 0 0
7 4 90 10 0 0 0
8 9 0.47 10 0 0 0
9 10 6.94 10 0 0 0
10 11 0.66 10 0 0 0
11 12 6.94 10 0 0 0
12 13 0.83 10 0 0 0
13 14 141.36 10 0 0 0
14 15 0.83 10 0 0 0
15 16 6.94 10 0 0 0
16 17 0.66 10 0 0 0
17 18 6.94 10 0 0 0
18 19 0.47 10 0 0 0
19 20 7.04 10 0 0 0
20 21 0.31 10 0 0 0
21 22 7.23 10 0 0 0
22 23 0.23 10 0 0 0
23 24 7.48 10 0 0 0
24 25 0.19 10 0 0 0
25 26 142.00 10 0 0 0
26 27 0.19 10 0 0 0
27 28 7.48 10 0 0 0
28 29 0.23 10 0 0 0
29 30 7.23 10 0 0 0
30 31 0.31 10 0 0 0
31 8 7.04 10 0 0 0
[NumHoles] = 0
[NumBlockLabels] = 9
-100 0 1 -1 0 0 0 1 2
81 0 1 -1 0 0 0 1 0
81 96 2 5 0 0 0 1 0
81 -26.25 3 1 0 0 0 1 0
81 -15.75 3 1 0 0 0 1 0
81 -5.25 3 1 0 0 0 1 0
81 5.25 3 1 0 0 0 1 0
81 15.75 3 1 0 0 0 1 0
81 26.25 3 1 0 0 0 1 0