STT320
Thyristor-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
3 x STT320
0.15
K/W
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
ZthJC
30°
DC
RthJC for various conduction angles d:
0.10
0.05
d
RthJC (K/W)
DC
0.112
0.113
0.114
0.115
0.115
180oC
120oC
60oC
30oC
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
0
1
2
3
0.003
0.0143
0.0947
0.099
0.168
0.456
0.00
10-3
10-2
10-1
100
101
102
s
t
0.20
Fig. 9 Transient thermal impedance
junction toheatsink(perthyristor
or diode)
K/W
ZthJK
30°
DC
0.15
RthJK for various conduction angles d:
d
RthJK (K/W)
DC
0.152
0.154
0.154
0.155
0.155
0.10
0.05
180oC
120oC
60oC
30oC
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
0
0.00
10-3
1
2
3
4
0.003
0.0143
0.0947
0.04
0.099
0.168
0.456
1.36
10-2
10-1
100
101
s
102
t
SIRECTIFIER [ SIRECTIFIER SEMICONDUCTORS ]
