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SSAC18
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)
R
thJC for various conduction angles d:
d
R
thJC (K/W)
DC
1.3
180oC
1.35
120oC
1.39
60oC
1.42
30oC
1.45
Constants for Z
thJC calculation:
i
R
thi (K/W)
t
i (s)
1
0.018
0.0033
2
0.041
0.0216
3
1.241
0.191
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor)
R
thJK for various conduction angles d:
d
R
thJK (K/W)
DC
1.5
180oC
1.55
120oC
1.59
60oC
1.62
30oC
1.65
Constants for Z
thJK calculation:
i
R
thi (K/W)
t
i (s)
1
0.018
0.0033
2
0.041
0.0216
3
1.241
0.191
4
0.2
0.46
Solid State AC Controller(Anti-Parallel Thyristor-Thyristor Modules)
3 x SSAC18
SSAC18
SSAC18
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