Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
Circuit
W 3
3 x PSKT 44 or
3 x PSKH 44
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
PSKT 44 or
PSKH 44
ZthJC(t)
RthJC for various conduction angles d:
d
RthJC (K/W)
DC
0.53
0.55
0.58
0.6
180°
120°
60°
30°
0.62
Constants for ZthJC calculation:
i
Rthi (K/W)
ti (s)
1
2
3
0.015
0.026
0.489
0.0035
0.02
0.195
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
PSKT 44 or
PSKH 44
ZthJK(t)
RthJK for various conduction angles d:
d
RthJK (K/W)
DC
0.73
0.75
0.78
0.8
180°
120°
60°
30°
0.82
Constants for ZthJK calculation:
i
Rthi (K/W)
ti (s)
1
2
3
4
0.015
0.026
0.489
0.2
0.0035
0.02
0.195
0.68
POWERSEM GmbH, Walpersdorfer Str. 53
D - 91126 Schwabach
2003 POWERSEM reserves the right to change limits, test conditions and dimensions
Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20
POWERSEM [ POWERSEM GMBH ]
