Transient Simulation Runs

Joined: 18 Aug 2009 Posts: 14

It would be nice if I could specify a transient simulation than ran until a certain condition was achieved rather than for a certain time. For example, lets say I want to simulate one period of a soft switched converter. I may not know exactly how long that period will be, but I do know that the next period will start when the switch voltage is zero. I can run batched simulations more efficiently if I only simulate as long as I have to.

I also second the need for a SPICE to PWL model converter (mostly for power semiconductors).

Overall I compliment you on a well designed simulator. It was about time that SOMEONE created a PWL simulator that can be controlled from other languages (PYTHON, MATLAB, etc). I will be at the ECCE so if I have time I'll stop by.

Site Admin Joined: 15 Jan 2009 Posts: 25

Thank you for suggestion, I'll put "Run until..." option into my "to do " list. However, you can do something similar with the script, checking for condition at the end of the screen. Here is example from the Manual:

Wait for condition. Transient is running until peak-to-peak value of the trace is less than specified threshold. ...

threshold=1e-6;
tran;
while( v(c1).pp>threshold ) cont;

Of course, it's not exactly it, but may work for now.
Alexei.

Site Admin Joined: 15 Jan 2009 Posts: 25

nl5 wrote:

I'll put "Run until..." option into my "to do " list.

"Run until..." is available in 1.33 in Transient/Settings window.