[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [femm] Re: inductance - parallel strips




To Dear Tomislav:


How are you? Did you get inductance, L(femm)=1.1517 e-6 H/m, with your
FEM model? I did not. At a glance, there is no space, left of left conductor and right of right conductor, and top and bottom too. In other words, there is no room for filed to develop fully. Or, the text file attached was corrupted in the delivery via e-mail ?


Thanks
Sincerely,
SE-HO YOU

From: Tomislav Borzic <tborzic@xxxxxxxxx>
Precedence: bulk
List-Unsubscribe: <mailto:femm-unsubscribe@xxxxxxxxxxxxxxx>

Hello Jim, I solved this problem.
Problem was that part of the flux was closing through
conductor.So I changed boundary conditions to force
the
flux to stay BETWEEN conductors, not in them.
Femm file is attached.
Results:
L(femm)=1.1517 e-6 H/m

F1 L=lambda* N^2

lambda=mio*b/h,
b=distance between conductors (not their radius)
h-height

L(F1)=1.1 e-6 H/m

***
i have another question, regarding complex inductance.
inductance doesn't depend of current, so often in
numerical
examples it is not given.so if I want to achieve same
result
as numerical (with current not given, but other
parameters are)
how can I solve similar problem in femm?
thanx
Tomislav

__________________________________________________
Do You Yahoo!?
Find the one for you at Yahoo! Personals
http://personals.yahoo.com
[Format] = 3.0
[Frequency] = 0
[Precision] = 1e-008
[LengthUnits] = centimeters
[ProblemType] = planar
[Coordinates] = cartesian
[Comment] = "Add comments here."
[PointProps] = 0
[BdryProps] = 0
[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
<LamType> = 0
<LamFill> = 1
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "Copper"
<Mu_x> = 1
<Mu_y> = 1
<H_c> = 0
<H_cAngle> = 0
<J_re> = 0
<J_im> = 0
<Sigma> = 58
<d_lam> = 0
<Phi_h> = 0
<LamType> = 0
<LamFill> = 1
<BHPoints> = 0
<EndBlock>
<BeginBlock>
<BlockName> = "Pure Iron"
<Mu_x> = 14872
<Mu_y> = 14872
<H_c> = 0
<H_cAngle> = 0
<J_re> = 0
<J_im> = 0
<Sigma> = 10.44
<d_lam> = 0
<Phi_h> = 0
<LamType> = 0
<LamFill> = 1
<BHPoints> = 0
<EndBlock>
[CircuitProps] = 2
<BeginCircuit>
<CircuitName> = "+"
<VoltGradient_re> = 0
<VoltGradient_im> = 0
<TotalAmps_re> = 1
<TotalAmps_im> = 0
<CircuitType> = 0
<EndCircuit>
<BeginCircuit>
<CircuitName> = "-"
<VoltGradient_re> = 0
<VoltGradient_im> = 0
<TotalAmps_re> = -1
<TotalAmps_im> = 0
<CircuitType> = 0
<EndCircuit>
[NumPoints] = 8
0	0	0	0
1	0	0	0
15	0	0	0
16	0	0	0
0	16	0	0
1	16	0	0
15	16	0	0
16	16	0	0
[NumSegments] = 10
4	5	-1	0	0	0
5	1	-1	0	0	0
1	0	-1	0	0	0
0	4	-1	0	0	0
6	7	-1	0	0	0
7	3	-1	0	0	0
3	2	-1	0	0	0
2	6	-1	0	0	0
5	6	-1	0	0	0
2	1	-1	0	0	0
[NumArcSegments] = 0
[NumHoles] = 0
[NumBlockLabels] = 3
0.40000000000000002	11.6	2	0.20000000000000001	2	0	0
7	11.4	3	0.40000000000000002	0	0	0
15.6	11.4	2	0.20000000000000001	1	0	0


_________________________________________________________________
Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp