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Description
3.3 Power unit
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
3.3.2.3
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.
32
3rd Party LCI Control Upgrade
Operating Instructions, 02/2022, A5E31872818
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