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an AC problem, about "The DAE is structurally inconsistent"
Posted 2014年3月1日 GMT-5 08:19 Low-Frequency Electromagnetics Version 4.3a, Version 4.3b 2 Replies
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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
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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