Effect of source inductance in 3-Ø fully controlled converter By 13MPE0031
Oct 27, 2015
OPERATION
A phase to B phase, when T3 is fired and T1 is supposed to go OFF. This causes 3 devices to conduct simultaneously for a short-while; i.e., T1, T2 and T3 –all three conduct simultaneously causing the forward current to be shared between A and B phases (T1 and T3) and the return current being carried by T2 or C phase. This causes a reduction in the output voltage. If 1 and 2 were conducting, the output would have been VAC. If 2 and 3 are only conducting, the output would have been VBC. Because all three of them are conducting the output Dc voltage will be an average of these two line to line voltages i.e.,(VBC+VAC)/2
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.080
100
200
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-5
0
5
10
15
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-500
0
500<Thyristor voltage>
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.080
5
10
15
Time
<Thyristor current>
R-LOAD
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-50
0
50
100
150
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-5
0
5
10
15
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-500
0
500<Thyristor voltage>
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.080
5
10
15
Time
<Thyristor current>
RL-LOAD
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.080
50
100
150
200
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-5
0
5
10
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08-400
-200
0
200
400<Thyristor voltage>
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.080
5
10
Time
<Thyristor current>
RLE-LOAD