Inability to simulate a thyristorized circuit. Simulator slows down into fempto-second/second speed, (practically stops).

Hi AntonyTheodorakis ,

Would like to try your circuit, but:

Have you tried .options debugtran to see if any node voltages or device currents in particular have trouble converging.

mike

6562.PROJECT.zip

Yes, I add the missing files, and also the directive .option debugtran is used. 

Hi AntonyTheodorakis ,

Are there supposed to be devices here:

The debugtran scores above 50 suggest significant problems at these nodes:

Node Convergence Difficulty Score:

ut2:emon#current : 87.817537

ut2:vdvdt#current : 87.811622

ut5:emon#current : 87.779092

ut5:vdvdt#current : 87.771699

ut5:dka#int1 : 50.150821

p2c : 50.150821

ut5:dvdt2 : 50.150821

p5c : 50.150821

ut2:dka#int1 : 50.150821

ut5:anode2 : 50.150821

x1:vp2 : 50.150821

x1:vp5 : 50.150821

ut2:anode2 : 50.150821

ut2:dvdt2 : 50.150821

ut5:dvdt1 : 50.149342

ut2:dvdt1 : 50.149342

ut1:vdvdt#current : 27.132929

ut6:emon#current : 27.113707

ut1:emon#current : 27.113707

ut6:vdvdt#current : 27.058997

ut5:anode0 : 27.051604

ut2:anode0 : 27.050126

ut5:dgkf#int1 : 14.251072

ut2:dgkf#int1 : 14.251072

ut5:gate1 : 14.249593

ut2:gate1 : 14.249593

p5g : 13.186456

p2g : 13.186456

Mr, MStokowski, please use my symbols that included, in the zipped file, and not the standard, that Ltspice library include. I always use custom symbols (symmetrical), and not the standard Ltspice (asymetical) . Yes i use the .OPTION DEBUGTRAN, i show similar values, but this is not give a solution. Why The circuit is start with reasonable speed, and after some periods practically stop?

Also i include a pdf file of the circuit, as sown in my setup. PDF

And a printout of the simulated results, before the timestep is reduced dramaticaly.

PDF

AntonyTheodorakis said:

please use my symbols that included, in the zipped file, and not the standard, that Ltspice library include.

OK, hard to do when your symbols are in subdirectories and defined in the schematic as such. Do this:

1. Close the schematic
2. Close LTspice
3. Copy all custom symbols to the schematic directory
4. Open LTspice
5. Open the Schematic
6. Inspect the Schematic asc file in a text editor. There should be no SYMBOL lines with paths like this: SYMBOL PASSIVES-PARASITICS\\IND2
7. Repackage and send

mike