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Is the "node" in circuit the same with the "boundary" in lumped ports?

Posted May 4, 2012, 4:37 a.m. EDT Version 4.2 3 Replies

Nan Jia
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Hi everybody.

I'm new here and i have come across with many many stupid questions like this== .
If they are different ,then what does the "node" refers to when I want to add a voltage excitation in the physics "circuit" into the model.

Thank you very much.
3 Replies Last Post May 7, 2012, 2:18 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 4, 2012, 11:12 a.m. EDT
Hi

the node in the Circuit are the Spice type nodes (where you sum the currents) while in the BC itsTerminal id numbers to distinguish the different terminal names

--
Good luck
Ivar
Hi the node in the Circuit are the Spice type nodes (where you sum the currents) while in the BC itsTerminal id numbers to distinguish the different terminal names -- Good luck Ivar
Nan Jia
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Posted: 1 decade ago May 7, 2012, 8:19 a.m. EDT
Thank you Ivar!

Now I want to add a voltage source between two terminals , how can I define the "node" in the setting window of the voltage source?
Should I define the nodes first? Where should I do this then?

Thank you so much,
sincerely yours.

Thank you Ivar! Now I want to add a voltage source between two terminals , how can I define the "node" in the setting window of the voltage source? Should I define the nodes first? Where should I do this then? Thank you so much, sincerely yours.
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago May 7, 2012, 2:18 p.m. EDT
Hi

you can define a boundary to gnd and another to a voltage source inside most ACDC physics without any "circuit".

The latter is really usefull if you want to add some know electronics, such as an amplifier or a feedback loop or a sensor conditionner electronics with a know impedance

--
Good luck
Ivar
Hi you can define a boundary to gnd and another to a voltage source inside most ACDC physics without any "circuit". The latter is really usefull if you want to add some know electronics, such as an amplifier or a feedback loop or a sensor conditionner electronics with a know impedance -- Good luck Ivar

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