STT116
Thyristor-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STT116
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
RthJC for various conduction angles d:
d
RthJC (K/W)
DC
0.22
0.23
0.25
0.27
0.28
180oC
120oC
60oC
30oC
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
2
3
0.0066
0.0678
0.1456
0.0019
0.0477
0.344
Fig. 9 Transient thermal impedance
junction toheatsink(perthyristor
or diode)
RthJK for various conduction angles d:
d
RthJK (K/W)
DC
0.42
0.43
0.45
0.47
0.48
180oC
120oC
60oC
30oC
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
2
3
4
0.0066
0.0678
0.1456
0.2
0.0019
0.0477
0.344
1.32
SIRECTIFIER [ SIRECTIFIER SEMICONDUCTORS ]
