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STT500
Thyristor-Thyristor Modules
Fig.10 Transient thermal impedance
junction to heatsink (per thyristor)
0
300
600
900
1200
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
t
Z
thJK
s
t
10-3
10-2
10-1
100
101
102
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
K/W
Z
thJC
I
RMS
P
tot
0
25
50
75
100
125
150
A
3xMT C500
Circuit
W3
10-3
10-2
10-1
100
101
102
0.00
0.02
0.04
0.06
0.08
0.10
0.12
DC
180°
120°
60°
30°
DC
180°
120°
60°
30°
°C
T
A
W
K/W
s
R
thKA K/W
0.01
0.02
0.03
0.045
0.06
0.08
0.12
Fig. 9 Transient thermal impedance
junction to case (per thyristor)
Fig. 8 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
R
thJC for various conduction angles d:
d
R
thJC (K/W)
DC
0.072
180oC
0.0768
120oC
0.081
60oC
0.092
30oC
0.111
Constants for Z
thJC calculation:
i
R
thi (K/W)
t
i (s)
1
0.0035
0.0054
2
0.0186
0.098
3
0.0432
0.54
4
0.0067
12
R
thJK for various conduction angles d:
d
R
thJK (K/W)
DC
0.096
180oC
0.1
120oC
0.105
60oC
0.116
30oC
0.135
Constants for Z
thJK calculation:
i
R
thi (K/W)
t
i (s)
1
0.0035
0.0054
2
0.0186
0.098
3
0.0432
0.54
4
0.0067
12
5
0.024
12
3 x STT500
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