Annex; Fourier Analysis/ Spectrum; Formula - KEB COMBILINE Manual

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5.

Annex

5.1 Fourier Analysis/ Spectrum

100
80
60
40
20
0
1
2
3
4
5
6
7
Spektrum des Eingangsstromes eines KEB OSF 8% THDI
Spektrum des Eingangsstromes eines KEB FU mit Drossel

5.2 Formula

THD
PWHD
S
equ
R
sce
GB - 14
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
Ordnungszahl der Oberschwingung
40
I
⎜ ⎜
=
N
THD
=
n
2
I
40
I
⎜ ⎜
=
PWHD
n
=
n
14
I
=
S
* 3
U
*
equ
i
S
=
sc
R
sce
S
equ
Spektrum des Eingangsstromes eines KEB FU ohne Drossel
⎟ ⎟
2
1
⎟ ⎟
2
N
1
I
equ

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