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FORMULA
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VRMS x 108
B =
4,44 x f x N x Ae .Sine Wave |
1 Lim D B mi
=
mo D H |
|
VRMS x 108
B =
4 x f x N x Ae Obs.: Onda Quadrada |
AL x S I / A me
@ ......... .mo |
|
....0,4 x p x N x I DC
HDC=
...... Le |
..... L AL
=
.... N2
B £ 0,25 mT or 2,5 Gauss |
|
1,41 x 0.4 x p x N x I RMS
H
. Le |
|
| Where: | |
| H = Field strength [Oe] | |
| B = Flux Density [Gauss] | |
| L = Indutance [nH] | |
| AL = Indutance Factor [nH] | |
| S I/A = Core Factor [cm-1] | |
| Le = Effective Length [cm] | |
| Ae = Effective Area [cm2] | |
| mi = Initial permeability | |
| me = Effective Permeability | |
| VRMS = Volts RMS [V] | |
| IDC = DC current [A] | |
| IRMS = RMS current [A] | |
| f = Frequency [HZ] | |
| N = Nbr. of turns | |
| mo = 12.57 [nH/cm] | |
| Measurement conditions of AL : B £ 0,25 mT or 2,5 Gauss | |
| f = 4 to10 Khz | |


