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The GE IS200DSFCG1AEB Driver Shunt Feedback Card (DSFC) is a critical Printed Circuit Board (PCB) used in high-performance industrial drive systems for precise control and fault protection.1
It is part of the GE Speedtronic Mark VI Turbine Control System and the Innovation Series Drives, where it interfaces directly with the power components.2
⚡ Primary Functions
The DSFC board combines the functions of an IGBT Gate Driver and a Shunt Feedback circuit for one phase leg of an inverter bridge.3 Its main responsibilities are:
- IGBT Gate Driving: It provides the necessary isolated high-power drive signals to turn the IGBTs (Insulated-Gate Bipolar Transistors) in the power bridge ON and OFF precisely according to commands from the main drive control system.
- Shunt Feedback (Current Sensing): It incorporates a shunt resistor to accurately measure the current flowing through the phase leg.4 This feedback signal is essential for the drive controller to regulate motor torque and current precisely.5
- Fault Detection: It contains vital circuitry to detect immediate faults at the power component level, such as:
- Desaturation Faults: Occurs if the IGBT fails to fully turn ON (i.e., collector-emitter voltage is too high), indicating a potential short circuit or overload.6
- Under-Voltage Faults: Reports when the local power supply to the gate driver drops below a safe operating level.7
- It immediately reports these faults back to the main control board (like the BPIB) to initiate a fast, protective trip of the power stage.
⚙️ Technical Details and Application
| Feature | Details |
| System | GE Speedtronic Mark VI Turbine Control System, Innovation Series Drives |
| Function | Gate Driver and Shunt Feedback for a phase leg |
| Compatibility | Used with 1000 Amp and 1800 Amp PWM (Pulse Width Modulated) AC Drives and source bridges. |
| Configuration | A 1000 Amp system requires three DSFC boards (one per phase). A 1800 Amp system requires six DSFC boards. |
| Mounting | Mounts directly to the upper and lower IGBT modules in a phase leg to keep connections short and reliable. |
| Protection | Features Galvanic and Optical Isolation for feedback and driver circuits to prevent electrical noise and ensure safety. |
In summary, the IS200DSFCG1AEB is a high-reliability interface that connects the low-power logic of the drive controller to the high-power switching components, ensuring accurate current regulation, efficient switching, and fast protection of the industrial drive system.
