Below is the datasheet of the IGBT
https://www.semikron.com/dl/service-support/downloads/download/semikron-datasheet-skm75gb063d-22890050
It has 4 Control Pins , Number 4,5,6,7 . Generally a MOSFET has a single gate which is used to trigger the saturation mode (Short Circuit Collector and Emitter).
I'am confused here , can someone help me out on how to perform ON , OFF switching with these 4 pins available .
Thanks
Best Answer
From a drive point of view, an IGBT is very similar to a MOSFET
An IGBT,like a MOSFET is a 3 terminal device. It is controlled via the Gate-Emitter (gate-source for a MOSFET) voltage
To turn on a MOSFET you must raise the GATE voltage with respect to the SOURCE above the threshold voltage. Likewise to turn on an IGBT you must raise the GATE voltage with respect to the EMITTER above the threshold voltage
You are probably used to seeing the SOURCE of a MOSFET ground/earth/0V referenced and thus this key driving requirement appears as just a "gate voltage."
This particular IGBT module you are linking is an inverter leg made from 600V IGBT's. You will most certainly an isolated driver circuit that is capable of at least 600V+ between the primary & secondary which can also tolerate at 1500V/us dv/dt
When the voltage between pins4 & 5 (gate and emitter) exceeds 5.5V the left and IGBT will facilitate current flow from terminals 3 to 1
When the voltage between pins6 & 7 (gate and emitter) exceeds 5.5V the left and IGBT will facilitate current flow from terminals 1 to 2