ABB LT8978bV1 HIEE320639R1 communication exchange unit
lectrical converters on-board trains
can be separated into two groups:
Main converters as drives for the elec trical (traction) motors and auxiliary
converters for other electrical needs
on-board the train, such as heating,
cooling and lighting.
The topic of this section is the latter,
auxiliary converters. These auxiliary
converters are produced according to
the needs and demands of the end customers as customized products in
batch-sizes that can be as low as only
a few pieces. Therefore, the most im portant requirement on the control
platform is:
Easy adaptation and rapid deployment
This requirement is met by the auto matic code-generation feature for fast
real-time applications using MATLAB/
Simulink: With a few changes in the
graphical user-interface of Simulink,
the software can be adapted to incor porate customer-specific wishes.
Whereas in a normal control system in
such a situation, changes would have
to be implemented in the code and
system tests made to guarantee the
proper functioning; in the AC 800PEC

platform the code is automatically
generated from the graphical user inter face.
Another demand stems from the fact
that such auxiliary converters are typi cally located on the roof or below the
carriage. This placement within the
train imposes some additional require ments on the control system: The
hardware must be industrial grade and
must be contained within limited
space.
Traction is the most important appli cation of AC 800PEC,
and since trac tion has particularly harsh environ mental conditions, the requirement for
industrial grade hardware is met by all
devices belonging to the AC 800PEC
platform. Besides conformal coating,
which is typically used in areas where
clean air cannot be guaranteed, the
devices have an extended temperature
range of – 40 to + 75 °C, and must be
resilient to vibration according to the
traction standard IEC 61373 (Railway
applications – Rolling stock equip ment – Shock and vibration tests).