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From: EE123 on 18 May 2010 16:16
I am running a magnetic transformer simulation.
However, I get an error involving convergence.

A message comes up saying that the minimum time step
allowed is 35.00 E-15 seconds.
Is this an absolute minimum?
Or can I change it?
If so, then where because I have been searching all
over and cannot find where to change it.

TIA,
Dave
From: Nico Coesel on 18 May 2010 16:37
EE123 <onyx49(a)juno.com> wrote:

>I am running a magnetic transformer simulation.
>However, I get an error involving convergence.
>
>A message comes up saying that the minimum time step
>allowed is 35.00 E-15 seconds.
>Is this an absolute minimum?
>Or can I change it?
>If so, then where because I have been searching all
>over and cannot find where to change it.

Decreasing the time step won't help. Its better to add some parasitic
resistance or capacitance. Convergence problems usually indicate the
simulator can't deal with the circuit.

--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
nico(a)nctdevpuntnl (punt=.)
--------------------------------------------------------------
From: Charlie E. on 18 May 2010 17:47
On Tue, 18 May 2010 13:16:25 -0700 (PDT), EE123 <onyx49(a)juno.com>
wrote:

>I am running a magnetic transformer simulation.
>However, I get an error involving convergence.
>
>A message comes up saying that the minimum time step
>allowed is 35.00 E-15 seconds.
>Is this an absolute minimum?
>Or can I change it?
>If so, then where because I have been searching all
>over and cannot find where to change it.
>
>TIA,
>Dave
\
Dave,
You can't really change it. (i.e. you can, but it is more complex than
you want to handle!) What you want to do is figure out why your
circuit isn't simulating. When in doubt, remember that in the real
world there are no pure resistances, inductances or capacitances.
Enter those into your simulation, and you will be amazed at what you
can simulate!

Charlie
From: Jim Thompson on 18 May 2010 18:15
On Tue, 18 May 2010 20:37:28 GMT, nico(a)puntnl.niks (Nico Coesel)
wrote:

>EE123 <onyx49(a)juno.com> wrote:
>
>>I am running a magnetic transformer simulation.
>>However, I get an error involving convergence.
>>
>>A message comes up saying that the minimum time step
>>allowed is 35.00 E-15 seconds.
>>Is this an absolute minimum?
>>Or can I change it?
>>If so, then where because I have been searching all
>>over and cannot find where to change it.
>
>Decreasing the time step won't help. Its better to add some parasitic
>resistance or capacitance. Convergence problems usually indicate the
>simulator can't deal with the circuit.

Shhhhh! Don't give away our trivial secrets :-)

...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

The only thing bipartisan in this country is hypocrisy
From: Vladimir Vassilevsky on 18 May 2010 18:37


Jim Thompson wrote:

> On Tue, 18 May 2010 20:37:28 GMT, nico(a)puntnl.niks (Nico Coesel)
> wrote:
>
>
>>EE123 <onyx49(a)juno.com> wrote:
>>
>>
>>>I am running a magnetic transformer simulation.
>>>However, I get an error involving convergence.
>>>
>>>A message comes up saying that the minimum time step
>>>allowed is 35.00 E-15 seconds.
>>>Is this an absolute minimum?
>>>Or can I change it?
>>>If so, then where because I have been searching all
>>>over and cannot find where to change it.
>>
>>Decreasing the time step won't help. Its better to add some parasitic
>>resistance or capacitance. Convergence problems usually indicate the
>>simulator can't deal with the circuit.
>
>
> Shhhhh! Don't give away our trivial secrets :-)

I bet he is running a square wave...
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