Simple gate driver with signal transformer

[Jorgen M.]

Hi

I'm trying to figure out how to make a simple gate driver with a signal transformer, but I have run into two issues I can not figure out, perhaps you can help me. I only have three design constraints, the value of C3, C4 and I need it to be simple as possible.

1. I can not speed up the charging of C3 (maybe also C4), how to do it if possible?
2. There is a huge current spike through D1 and I do not know if that is only a simulation issue or something like that, if it is not, then how do I remove the spike?

Edit: The attached zip file contains the LTspice files

 

[Easy peasy]

you've got no means of re-setting the transformer - this ckt will never work well ....

--- Updated Sep 7, 2020 ---

also a real GT Tx will have much higher Lmag and some leakage L, better to establish +15 and -10V on the right hand ( isolated side ) and then use either another signal Tx to create the gate drive - or use ah high speed opto to do same - then you can have an emitter follower by the IGBT which can easily supply the turn on & turn off currents ....

 

[Jorgen M.]

Hi Easy peasy

Thank you for your good advice. Then I was mistaken that the transformer would be reset by the subsequent negative voltage input pulse.