WEG CFW11M G2 Series - Harmonics of the 6-Pulse Rectifier

Installation and Connection
3-14 | CFW-11M G2
3
3. 2.1.4 Harmonics of the 6-Pulse Rectifier
Table 3.6 on page 3-14, Figure 3.16 on page 3-14 and Figure 3.17 on page 3-14 show the typical values of the
harmonic content of the currents, Power Factor (PF) and THD (I) on the power supply, considering the 6-pulse
rectifier.
Table 3.6: Individual harmonics, Power Factor and THD (I) typical for rated load in the output, 6-pulse rectifier
Harmonic
Order
I (%) FP THD(I)
1 100.0 %
0,89 42 %
5 38.7 %
7 14.1 %
11 6.7 %
13 3.3 %
17 2.9 %
19 1.9 %
23 1.4 %
Normalized Harmonic Amplitude
40 %
35 %
25 %
15 %
5 %
30 %
20 %
10 %
0 %
0 % 20 % 40 % 60 %
Load percentage
5th Harmonic
7th Harmonic
11th Harmonic
13th Harmonic
17th Harmonic
19th Harmonic
23th Harmonic
80 % 100 %
120 %
Note: Amplitude of the normalized harmonics as a function of the fundamental with 100 % of load. 6-pulse rectifier.
Figure 3.16: Typical values of the harmonics of the input current with variation of the output power
Normalized Harmonic Amplitude
Load percentage
5th Harmonic
7th Harmonic
11th Harmonic
13th Harmonic
17th Harmonic
19th Harmonic
23th Harmonic
0 %
0,0 %
0,5 %
1,0 %
1,5 %
2,0 %
2,5 %
3,0 %
20 % 40 % 60 % 80 % 100 % 120 %
Figure 3.17: Power Factor (FP) and THD(I) with variation of the output power 6-pulse rectifier