ABB PSTX1050-600-70 Operational Voltage Main Circuit

ABB PSTX1050-600-70 Operational Voltage Main Circuit

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Gate resistors are connected in between booster stage and IGBT module gate connection. Suggested values are listed in table 5 on page 25 and table 7 on page 36. For some modules the value for these resistors is 0 . In this case just a jumper is required. If resistors are needed, care should be taken that these resistors have a suitable rating for repetitive pulse power to avoid degradation. The short circuit protection of the Evaluation Driver Board basically relies on the detection of a voltage level higher than 9 V on the DESAT pin of the 1ED020I12-F driver IC and the implemented active clamp function. 

Thanks to this operation mode, the collector-emitter overvoltage, which is a result of the stray inductance and the collector current slope, is limited. The overvoltage shoots during turning-off changes as a function of the stray inductance, the current and the DC voltage. Figure 9 shows the parts of the circuit needed for the desaturation function and the active clamping. The EconoDUALTM 3 driver board is equipped with an additional diode D1 to avoid a bypass current during the turning-on sequence.

ABB PSTX1050-600-70 Technical drawing:

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