Accessories
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3ADW000462R0401 DCS880 Hardware manual e d
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.
– 2 channel measurement of actual field current in the DC circuit.
– High ohmic measurement of AC voltage. Residual resistance to ground
1.6 MOhm.
– H8 controller for drive-to-drive communication based on CAN standard.
– Driver circuit to fire the half control bridge.
– The firmware is stored in a flash memory and contains:
The PI current controller for the field circuit.
The fault and reset logic.
The synchronization and PLL function.
The setting of the current measurement channel.
All parameters are set from the armature converter via drive-to-drive communication. The field
current reference, actual field current, current control and status bits are cyclic sent via drive-to-drive
communication.
The field exciter is equipped with an autoscaling function of the burden resistors based on the
nominal field current of the motor.
Power part
The power part is a 3-phase half controlled bridge with free-wheeling diode.
The external field exciter DCF803-0016 and DCF803-0035 are 3-phase half controlled bridges
including snubbers based on the SDCS-FEX-4. Line fuses, line reactors and transformers are
installed outside the housing.
The FEX-425-Int (internal field exciter) can only be installed in H5 and H6 modules. The unit is based
on a SCDS-FEX-4. For a H5 the supply must be connected via line reactors and fuses located
outside of the module.
For a H6 the supply must be connected via line reactors outside of the module. The fuses are
installed in the module.
For single-phase operation connect terminals U and W. For single-phase operation an
autotransformer for voltage adaptation is recommended.
Please see comparison of output voltage ripple between single-phase and 3-phase operation.
Power part
AC input voltage
110 V -15% ... 500 V +10%; single or 3-phase
AC input current
< DC output current
Frequency
Same as DCS converter
AC isolation voltage
600 V
Line reactor
External
Line fuses
KTK25 for FEX-425-Int; external for DCF803-0016 and DCF803-0035
DC output current
0.3 A ... 16 A = DCF803-0016
0.3 A ... 25 A = FEX-425-Int
0.3 A ... 35 A = DCF803-0035
Powerloss
< 130 W (at rated current)
Auxiliary supply
DC input voltage
24 V
DC
DC input current
< 200 mA supplied via X51 of SDCS-DSL-H1x
Buffering
10 ms
