4-4
MCC 56
MCD 56
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)
RthJC for various conduction angles d:
d
DC
180°
120°
60°
30°
RthJC (K/W)
0.45
0.47
0.49
0.505
0.52
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
0.014
2
0.026
3
0.41
0.015
0.0095
0.175
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
RthJK for various conduction angles d:
d
DC
180°
120°
60°
30°
RthJK (K/W)
0.65
0.67
0.69
0.705
0.72
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
0.014
2
0.026
3
0.41
4
0.2
0.015
0.0095
0.175
0.67
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