II K 3-10
Technical data
The DCS 400 converter has an build-in three-phase
field exciter with the following features:
• smoothed field voltage
- better commutation of the motor
- increased brush life
• less heat generation in the motor
• less effort of cabling
Fig. 3.7/1 Layout of the SDCS-FIS-3A field exciter
board
3.7 Field exciter SDCS-FIS-3A
Electrical data of SDCS-FIS-3A
AC input voltage: 230 V...500 V ±10%; three-phase
DC output voltage 50...440 V programmable
AC input current: £ output current
AC isolation voltage: 600 V
Frequency: same as DCS converter module
DC output current: 0.1 A...4 A for armature converter modules from 20 A to 25 A
0.1 A...6 A for armature converter mod. from 45 A to 140 A
0.3 A...16 A for armature converter mod. from 180 A to 550 A
0.3 A...20 A for armature converter mod. for ³ 610 A
Power loss see chapter 3.3
Terminal X10:1,2 on SDCS-PIN-3A
Cross sectional area 4 mm²
Fig. 3.7/2 Diagram of the field exciter unit
Remark:
The DC link capacitor of the IGBT based field exciter
serves as an overvoltage protection for the armature
converter.
Overloading of the DC link capacitor is prevented by
the connected motor field winding.
The energy of glitches caused by the commutation of
the armature converter is no longer waste energy but
is used by the field exciter.
The overvoltage protection only works if a field wind-
ing is connected.
Therefore DCS400 can not be used with discon-
nected field.
X5
X3
X4
X6
X7
X2
X1
X14
T100
SDCS-FIS-3A
145
45
U1
V1
W1
SDCS-CON-3A
X1
X2 X7
X10:2 X10:1
SDCS-PIN-3A SDCS-FIS-3A
X12: X12:
26
1
26
1
FPWM
8
IFM
9
8
9
GND
3
3
X14:
X14:
X11:2
3
X100:1-2 X6:1-3
X6X4X3
Converter
DC Output
(for motor field)
low level
control
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