You really only need to run until the transients have settled-out. The design I'm doing now runs at about 50kHz, and it takes 1-2 minutes to reach 15msec. Most of the transient activity ends around 3-4msec, but the runtime isn't a nuisance yet.
Is the simulation running really slow in 1 particular spot ? I see that happen a lot during the initial design, and it's usually caused by increased computations to handle discontinuities. Changing pulses from near-zero rise/fall times to a realistic value, and adding some parasitic series resistance can help. Also, having additional DC-paths around caps and inductors helps; 100Meg resistors in a few spots can work wonders. There is a gmindc parameter that effectively puts resistors to ground everywhere to help with convergence, but I dont use it. I believe this converter runs up to 1Mhz so if you are running that fast you may not need 8msec. If you do run that fast, be careful with component selection, as many power inductors undergo self-resonance in the Mhz region (see datasheet), and skin-effect will increase the resistance. And then there's capacitors; aluminum electrolytics are too inductive at that frequency so ceramic is a better option. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/2969db45-74b1-4a62-8d6c-356b0bb994bf%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
