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mf.Ex not defined
Posted Aug 13, 2015, 3:48 a.m. EDT Low-Frequency Electromagnetics 2 Replies
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Hi, I'm quite new to Comsol and I'm trying to understand Time Dependent studies. I've been following the "E_core_transformer_42(Comsol).pdf" tutorial to get a bit of an idea, some slight modifications like a different core and only one coil. However after I put in Component 1 > Definitions > Integration
for my coil. I see in my variables list where I've put in: Vip
That my expression: intop1((mf.Ex*ix+mf.Ey*iy+mf.Ez*iz)*Np/area)
Says:
Unknown variable mf.Ex
(same for mf.Ey and mf.Ez)
I tried adding physics Magnetic and Electric fields (mef), but this didn't help, does anyone know why it's like mf.E isn't defined? Thanks
for my coil. I see in my variables list where I've put in: Vip
That my expression: intop1((mf.Ex*ix+mf.Ey*iy+mf.Ez*iz)*Np/area)
Says:
Unknown variable mf.Ex
(same for mf.Ey and mf.Ez)
I tried adding physics Magnetic and Electric fields (mef), but this didn't help, does anyone know why it's like mf.E isn't defined? Thanks
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2 Replies Last Post Aug 13, 2015, 9:52 a.m. EDT
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Posted:
9 years ago
Hi,
If you define the "Variable" under Global Definitions, you would need to provide a full path of variables. For example, in your case the expression should be changed to :
intop1((comp1.mf.Ex*ix+comp1.mf.Ey*iy+comp1.mf.Ez*iz)*Np/area)
However, if you define the "Variable" under Component 1 -> Definitions -> Variables. You do not have to provide "comp1." before "mf.Ex", "mf.Ey" and "mf.Ez".
Hope this will be useful.
Best Regards,
Nirmal Paudel
If you define the "Variable" under Global Definitions, you would need to provide a full path of variables. For example, in your case the expression should be changed to :
intop1((comp1.mf.Ex*ix+comp1.mf.Ey*iy+comp1.mf.Ez*iz)*Np/area)
However, if you define the "Variable" under Component 1 -> Definitions -> Variables. You do not have to provide "comp1." before "mf.Ex", "mf.Ey" and "mf.Ez".
Hope this will be useful.
Best Regards,
Nirmal Paudel
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Posted:
9 years ago
Hi Nirmal,
I tried both those methods and both of them worked. Thanks very much [So what is the difference by putting component?]
Anyway now I'm getting the error:
"Unknown function or operator.
- Name: intop1
- Feature: Time-Dependent Solver 1 (sol3/t1)"
(And maybe another error:
"Internal geometry error.
Error in multiphysics compilation.")
Cheers,
Rob
I tried both those methods and both of them worked. Thanks very much [So what is the difference by putting component?]
Anyway now I'm getting the error:
"Unknown function or operator.
- Name: intop1
- Feature: Time-Dependent Solver 1 (sol3/t1)"
(And maybe another error:
"Internal geometry error.
Error in multiphysics compilation.")
Cheers,
Rob