Installation and Connection
CFW-11M G2 | 3-15
3
3.2.1.5 Harmonics of the 12-Pulse Rectifier
,
and
show the typical values of the
harmonic content of the currents, Power Factor and THD (I) on the power supply, considering the 12-pulse rectifier.
Table 3.7:
Individual harmonics, Power Factor and THD (I) typical for rated load in the output, 12-pulse rectifier
Harmonic
Order
I (%)
FP
THD(I)
1
100.0 %
0,96
7,1 %
5
0.0 %
7
0.0 %
11
6.0 %
13
3.2 %
17
0.0 %
19
0.0 %
23
1.1 %
Nor
ma
liz
ed
Ha
rm
on
ic
A
mpl
itud
e
0 %
1 %
2 %
3 %
4 %
5 %
6 %
7 %
20 %
40 %
60 %
80 %
100 %
120 %
0 %
Load percentage
5th Harmonic
7th Harmonic
11th Harmonic
13th Harmonic
17th Harmonic
19th Harmonic
23th Harmonic
Note:
Amplitude of the normalized harmonics as a function of the fundamental with 100 % of load. 12-pulse rectifier.
Figure 3.18:
Typical values of the harmonics of the input current with variation of the output power
Load percentage
20 %
40 %
60 %
80 %
100 %
120 %
0 %
0.97
12 %
0.968
11 %
0.966
10 %
0.964
0.962
8 %
0.96
7 %
0.958
6 %
P
ow
er
F
act
or
THD
9 %
Figure 3.19:
Power Factor (FP) and THD (I) with variation of the output power. 12-pulse rectifier