Accessories
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3ADW000194R0611 DCS800 Hardware Manual f us
Electrical data
* 3-phase or single phase operation
Control unit
The control includes the following main blocks:
• Micro controller H8 for current control synchronization and fault handling.
• Two channel actual field current measurement of DC circuit.
• H8 controller for serial communication based on CAN standard.
• Driver circuit for firing of half control bridge.
• The software is stored in the flash PROM memory. This software contains
PI current control for field circuit
Fault and reset logic
Synchronization and PLL function
setting of current measurement channel
The setting and updating of all control parameters are set from armature converter via DCS link serial
communication. Actual field current reference, current control and status bits are cyclic sent via DCS
link serial communication.
The field exciter is equipped with an autoscaling function of burden resistor based on nominal field
current of motor.
Power section
The power section is a three-phase half controlled bridge with free-wheeling diode.
The external field exciter DCF803-0035 is the three-phase half controlled bridge including snubbers
based on SDCS-FEX-4 board. Line fuses and the line reactor and transformer must be located outside
the housing.
The internal field exciter FEX425 is a ready installed field exciter in a D5 armature converter. The unit is
based on a SCDS-FEX-4 board and contains also line fuses. The supply must be connected by
independant line reactors located outside of the D5 module, see drawing in chapter The DCS800,
section Armature circuit converter DCS800-S D5...D7.
If the unit is used as a single phase supply the terminal U and W must be used. For single-phase supply
an autotransformer for voltage adaptation is recommended.
Please see comparison of output voltage ripple between single-phase and three phase-supply.
Power circuit
AC Field input voltage 110 V -15%...500 V +10% single or three-phase
AC input current < DC output current
Frequency same as DCS Converter module
AC isolation voltage 600 V
Line reactor external
Line fuses KTK25 for FEX425 internal; external for DCF803-0035
DC output current * 300 mA (min)...25 A= FEX425 internal; ...35 A = DCF803-0035
Powerloss < 130 W ( at rated current)
Auxiliary supply
DC input voltage 24 V DC
Input current < 200 mA supplied from SDCS-DSL-4 X51
Buffering 10ms
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