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T O P I C    R E V I E W
wufka Posted - Jan 22 2008 : 15:45:00

Dear All!

I’ve made the following very easy input file, and would like to know the inductivity of this solid. ( made from copper, and the geometry is given.)

.Units MM

.Default z=0 sigma=5.8e4

N1 x=0 y=0
N2 x=1 y=0
N3 x=1 y=2
N4 x=-1 y=2
N5 x=-1 y=0
N6 x=-0.01 y=0

E1 N1 N2 w=0.2 h=0.2
E2 N2 N3 w=0.2 h=0.2
E3 N3 N4 w=0.2 h=0.2
E4 N4 N5 w=0.2 h=0.2
E5 N5 N6 w=0.2 h=0.2

.external N1 N6

.freq fmin=1e4 fmax=1e8 ndec=1

.end

Any help would be appreciated!

1   L A T E S T    R E P L I E S    (Newest First)
Enrico Posted - Feb 12 2008 : 12:19:33
You should run the input file into FastHenry2.

I get the following results:


Computed matrices (R+jL)
 Row 0:  n1 to n6
 Freq = 10000
  Row 0: 0.00344397+3.80518e-006j 
 Freq = 100000
  Row 0: 0.00344397+3.80518e-006j 
 Freq = 1e+006
  Row 0: 0.00344397+3.80518e-006j 
 Freq = 1e+007
  Row 0: 0.00344397+3.80518e-006j 
 Freq = 1e+008
  Row 0: 0.00344397+3.80518e-006j 


Anyway please take care that your hi-frequency results are not correct, since you did not specify any internal discretization of the segments to model skin effect (nhinc, nwinc parameters).

Changing the input file to


.Units MM

.Default z=0 sigma=5.8e4 nhinc=7 nwinc=7

N1 x=0 y=0
N2 x=1 y=0
N3 x=1 y=2
N4 x=-1 y=2
N5 x=-1 y=0
N6 x=-0.01 y=0

E1 N1 N2 w=0.2 h=0.2
E2 N2 N3 w=0.2 h=0.2
E3 N3 N4 w=0.2 h=0.2
E4 N4 N5 w=0.2 h=0.2
E5 N5 N6 w=0.2 h=0.2

.external N1 N6

.freq fmin=1e4 fmax=1e8 ndec=1

.end



I get


Computed matrices (R+jL)
 Row 0:  n1 to n6
 Freq = 10000
  Row 0: 0.0103029+3.54403e-006j 
 Freq = 100000
  Row 0: 0.0277283+3.44387e-006j 
 Freq = 1e+006
  Row 0: 0.0346245+3.42846e-006j 
 Freq = 1e+007
  Row 0: 0.0347949+3.42819e-006j 
 Freq = 1e+008
  Row 0: 0.0347966+3.42819e-006j 


Best Regards,
Enrico

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