Voltage Actual Value Sensing - Siemens SINAMICS SL150 Operating Instructions Manual

Description
3.3 Power unit
The thyristor electronics module generates the following signals:
● Gate pulses
● Checkback signals
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
3.3.3.4

Voltage actual value sensing

The voltage actual values are measured using AVT combination modules, whose measuring
resistors are connected in series. This ensures a high degree of measuring accuracy.
36
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.
SINAMICS SL150 6SL38600UL432AA0Z
Operating Instructions Rev.201910281433 EXAMPLE