Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.
Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
an AC problem, about "The DAE is structurally inconsistent"
Posted Mar 1, 2014, 8:19 a.m. EST Low-Frequency Electromagnetics Version 4.3a, Version 4.3b 2 Replies
Please login with a confirmed email address before reporting spam
I want to apply a sine voltage source to a piezoelectric ceramic. it's a model of COMSOL named"thickness_shear_quartz_oscillator.mph". the model works well but when I change the AC source to sine source, set the frequency 50Hz, same as AC. error occurs:
The DAE is structurally inconsistent
Variabels 2
Equation 0
you can see the model in the model library, hope you can help me
Thanks in Advance
Hello Lance Vega
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.
Please login with a confirmed email address before reporting spam
Please login with a confirmed email address before reporting spam
it's a problem with the study. you can use sin(φ) for voltage source and frequency domain study and vice versa. I encounter this problem when I work on AC/DC module on the "Electric circuit" . this generalize to all the sources and studies.
so i recommend you follow this pattern when solving
DC source -> stationary study
AC '' -> frequency domain
Sin (t/T) -> time dependent