Hi. I'm using LTSpice to run the inductive switching circuit. I'm not able to reduce the spike for the VGE/IC.
Anyone know how to improve on that with L=100u ?
And about the diode clamp, do i need diode that have same value of VCEsat and ICsat as the DUT ?

 

I'm not able to reduce the spike for the VGE/IC.

I don't see any voltage spike in your simulation.

 

I don't see any voltage spike in your simulation.

How about the current ? How to reduce the spike ?

 

Not sure where that current spike is coming from.
It looks like you have a lot of capacitance at the IGBT's collector.
Measure and plot the current through D1 and L1 to see what those look like.

The diode should be rated for the supply voltage and the maximum inductor current.

 

Not sure where that current spike is coming from.
It looks like you have a lot of capacitance at the IGBT's collector.
Measure and plot the current through D1 and L1 to see what those look like.

Here is the waveform.

The diode should be rated for the supply voltage and the maximum inductor current.

So the average forward current (IF) and breakdown voltage for diode should follow the maximum current through the inductor and supply voltage ?

 

So the average forward current (IF) and breakdown voltage for diode should follow the maximum current through the inductor and supply voltage ?

Worst-case, yes.
For low duty-cycles you could get by with a smaller diode, if the diode peak current rating is more than the peak inductor current.