Siemens 6SL38503UM114PA0Z, Operating Instructions & Installation Instructions

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3.3.3.2 Thyristor electronics
Gate control and monitoring system
The thyristor electronics consist of the TAS CPLD module (thyristor control and protection,
complex programmable logic device).
The thyristor electronics are part of the thyristor control and monitoring system. They work
together with the Power Stack Adapter (PSA). The thyristor electronics can control all line-side
and motor-side converters which are supplied with voltage by the gate current of the thyristor
RC circuit.
The thyristor electronics module has the following tasks:
● They generate the gate pulses for the thyristors.
● Report information on the thyristor status, the thyristor electronics themselves, and the fiber-
optic cable connection to the Power Stack Adapter.
A thyristor electronics module is assigned to each thyristor.
A communication peer is required in the form of the Power Stack Adapter. The power stack
adapter supplies the optical gating pulses, and evaluates the feedback signals from the
thyristor electronics.
Mode of operation of thyristor electronics
Thyristor electronics are part of the thyristor control system. The thyristor electronics receive
the control signals from the Power Stack Adapter via fiber-optic cables.
The thyristor electronics module generates the following signals:
● Gate pulses
● Checkback signals
Checkback signals provide thyristor status and control information. Fiber-optic cables are
also used to send these checkback signals back to the Power Stack Adapter.
The Power Stack Adapter evaluates these status checkback signals from the thyristor
electronics.
With the "Thyristor in command window" status checkback signal and the synchronizing
voltage, the offset angle can be determined in a test operation.
The information that can be derived from the correlation between the command and the
generated signals includes:
1. Commutation errors
2. Bridge short-circuit
3. Inverter shoot-through
4. Misfiring
Description
3.3 Power unit
SINAMICS GL150 6SL38503UM114PA0Z
36
Operating Instructions Rev.201910301420 MUSTER