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CTT181
Thyristor-Thyristor Modules
Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
R
thJC for various conduction angles d:
d
R
thJC (K/W)
DC
0.155
180
oC
0.167
120
oC
0.176
60
oC
0.197
30
oC
0.227
Constants for Z
thJC calculation:
i
R
thi (K/W)
t
i (s)
1
0.0072
0.001
2
0.0188
0.08
3
0.129
0.2
R
thJK for various conduction angles d:
d
R
thJK (K/W)
DC
0.225
180
oC
0.237
120
oC
0.246
60
oC
0.267
30
oC
0.297
Constants for Z
thJK calculation:
i
R
thi (K/W)
t
i (s)
1
0.0072
0.001
2
0.0188
0.08
3
0.129
0.2
4
0.07
1.0
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