FORMULA
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VRMS x 108 B = [Gauss] 4,44 x f x N x Ae .Sine Wave |
1 Lim D B mi = DH® 0 mo D H |
VRMS x 108 B = [Gauss] 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= [Oe] ...... Le |
..... L AL = [nH] .... N2
B £ 0,25 mT or 2,5 Gauss |
1,41 x 0.4 x p x N x I RMS H [Oe] . Le |
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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 |