Siemens D7-SYS - Interfaces to the Power Electronics; SITOR Set

Closed-loop thyristor current control
System- and communication configuring D7-SYS - SIMADYN D 5-65
Edition 06.2002
5.5 Interfaces to the power electronics
The PM5/6 processor module and the ITDC expansion module with the
standard software are designed for three-phase bridges B6C or an anti-
parallel circuit configuration comprising two three-phase bridge circuits
B6(A)B6(C) with thyristors.
The connection between ITDC and the SITOR thyristor sets 6QG2x,
6QG3x is standardized. All of the signals are transferred via a 50-core
cable with sub-D connector. There is no potential isolation between the
SD and drive converter.
• There is a SITOR interface -X7 on the ITDC expansion module.
An SE20.2 interface module has been developed to connect the ITDC to
a 6QC5x SITOR thyristor cabinet unit. The reason is that the cabinet
system does not have a SITOR interface. SITOR cabinet units 6QC5 are
connected to the ITDC expansion module via the SE20.2 interface
module.
• If the power sections are mounted some distance away or are
connected in parallel, then adapter modules must be used.
5.5.1 SITOR set
The permanently configured "SITOR interface" -X2 of 6QG2x/6QG3x
SITOR sets are provided on the electronics module -A1.
The monitoring signals and actual values which are processed by
SIMADYN D are conditioned there.
The "SITOR interface" includes the following signals:
• < synchronizing voltage [ V ]
• < zero crossover signals V
L12
and V
L13
for rotating field detection
• > control pulses for torque directions 1 and 2
• < current actual value [kHz]
• < current actual value [ V ]
• < output voltage [kHz]
• < zero current signal
• < temperature monitoring
• < undervoltage monitoring
• < fuse monitoring