Turn-on of the N-channel IGBT
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I am trying to simulate a very simple circuit consisting of a DC voltage source (300 V), a resistor (10 ohm) and an N-channel IGBT, the emitter of which is grounded. In the settings of the IGBT, I have selected Fundamental non-linear equations for I-V characteristics and I hace specified a gate-emitter threshold voltage of 6 V. The gate driver voltage varies between -15 V and 15 V and the switching frequency is 10 kHz. However, when gate-emitter voltage exceeds the voltage, the IGBT does not start to conduct. It starts to conducyt only in the Miller region. I do not understand why it is happening. Can you please explain why it is happening ? I have attached herewith the relevant waveforms.
Mohsen Aleenejad on 9 Nov 2022
Are you sure those parameters in the N-Channel IGBT were set properly?
This happens due to the parameters you set for your IGBT, I've used the default switch parameters and the V_ce start to fall down right when Vge==6V:
The orange is default switch, blue is your parameters.