Hello all,
I am having trouble with simulation on a 3 phase inverter circuit.

1. The simulation time is very long, to the point I don't know if it ever finishes.
2. Removing the diodes across the switches, the simulation finishes in 5.9secs but...
3. plotting any of PWM signals will work, but try to plot anything in the converter or inverter sections nothing shows up in the plot
4. if I run sim with the alternate solver (control panel) it takes 22 seconds but converter/inverter sections work.

Am I expecting to much to be able to simulate the whole thing vs simulating smaller sections? Any suggestion/tips to be able to simulate faster?

 

Any suggestion/tips to be able to simulate faster?

Added resistors R4, R5, R6 and used this directive: .tran 1m uic


The same, but Stop time is 200 ms:

 

Thank you kindly, the resistors did the trick!

 

I hope it is okay to continue this thread instead of starting a new one. I made changes to the control signals to add dead time to the gate signals. This caused the simulation to slow dramatically. Why would this slow the simulation so much? Does it have something do with switching between analog and digital domains with the buffers? Suggestions for alternatives ways to implement without slowing so much?

 

I have a project on to make Inverter. In normal grid ac supply there is negative electric potential w.r.t. ground during negative half cycle. How does we get that negative potential wrt ground since what I done in my project is only chang the terminal of the battery with load. What I show in the whole process is just that both the two output terminal has positive voltage w.r.t. ground, but in actual grid support only the phase terminal has both positive and negative potential and the neutral wire is completely zero voltage. Please some one clear my dout.