Fig. 7 Three phase AC-controller:
Power dissipation versus RMS
output current and ambient
temperature
Circuit
W3
3 x PSKT 56 or
3 x PSKH 56
PSKT 56
PSKH 56
Z
thJC
(t)
Fig. 8 Transient thermal impedance
junction to case (per thyristor or
diode)
R
thJC
for various conduction angles d:
d
DC
180°
120°
60°
30°
R
thJC
(K/W)
0.45
0.47
0.49
0.505
0.52
Constants for Z
thJC
calculation:
i
1
2
3
R
thi
(K/W)
0.014
0.026
0.41
t
i
(s)
0.015
0.0095
0.175
PSKT 56
PSKH 56
Z
thJK
(t)
Fig. 9 Transient thermal impedance
junction to heatsink (per thyristor
or diode)
R
thJK
for various conduction angles d:
d
DC
180°
120°
60°
30°
R
thJK
(K/W)
0.65
0.67
0.69
0.705
0.72
Constants for Z
thJK
calculation:
i
1
2
3
4
R
thi
(K/W)
0.014
0.026
0.41
0.2
t
i
(s)
0.015
0.0095
0.175
0.67
POWERSEM GmbH, Walpersdorfer Str. 53
D - 91126 Schwabach
Phone: 09122 - 9764 - 0 FAX: 09122 - 9764 - 20
2003 POWERSEM reserves the right to change limits, test conditions and dimensions
POWERSEM [ POWERSEM GMBH ]
