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From: Krithik Kumar on 25 Mar 2010 23:00
I'm trying to make a boost converter using simscape , i'm able to run the same model in simpower systems , but encounter lot of problems( in simscape .. please advise ..

One of the error messages i get is Warning: Unable to reduce the step size without violating minimum step size of
7.291944825754407e-017 for 56 consecutive times at time 0.02052500000004618. This
usually may be caused by violating algebraic constraints in the
differential-algebraic system or by the high stiffness of the system. Try tightening
the error tolerances, and/or the tolerances for computing consistent conditions. If
the problem persists, please check the model 'untitled' or increase the Max
consecutive min step size violation parameter in the solver configuration panel.
From: Arnaud Miege on 21 Apr 2010 11:13
"Krithik Kumar " <kchandr7(a)iit.edu> wrote in message <hoh806$m5d$1(a)fred.mathworks.com>...
> I'm trying to make a boost converter using simscape , i'm able to run the same model in simpower systems , but encounter lot of problems( in simscape .. please advise ..
>
> One of the error messages i get is Warning: Unable to reduce the step size without violating minimum step size of
> 7.291944825754407e-017 for 56 consecutive times at time 0.02052500000004618. This
> usually may be caused by violating algebraic constraints in the
> differential-algebraic system or by the high stiffness of the system. Try tightening
> the error tolerances, and/or the tolerances for computing consistent conditions. If
> the problem persists, please check the model 'untitled' or increase the Max
> consecutive min step size violation parameter in the solver configuration panel.

It's difficult to answer without seeing the model. How did you model your boost converter? With the Simscape language or the blocks from the foundation library? If it is with Simscape language, can you post the code?

Otherwise, you can try contacting technical support:
http://www.mathworks.com/support/contact_us/index.html

Arnaud
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