Page 174 - Power Electronics Handbook

166 Static switches

c. 80-
C
al
t
3
0
.E 60 -
al
-
0
-
c
m

0 20 40 60 80 100 120 140 160 180
Firing angle ( a in degrees
)
F@rc 8.9 Variation of neutrd current with firing angk for the three-phase circuit of Figure
8.6(b), with a star-connected four-Wire resistive load

Firing angle (a")
Filpre 8.10 Harmonic content for the three-phase control system of Figure 8.qb)