Menu

Discussion Forum

New Discussion
Filtrer

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 The information provided may be out of date.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.

generator model, The DAE is structurally inconsistent

Posted 13 août 2014, 05:34 UTC−4 Low-Frequency Electromagnetics Version 4.3b 0 Replies

Michał Bardian
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello, I new Comsol user and I'm trying to make a 2d generator model. I used Rotating Machinery module and 2 Electric Currents modules, one for rotor and the second for stator. For rotor Electric Currents module I used Terminal and selected slots boundaries, in terminal type I choosed 'circuit'. For stator I did the same but I shared slots for 3 phases and for all this terminals I selected circuit.

My elecrical circuit (cir) parameters are:

Groung node 1: Connected to node 0
this part represents stator:
Resistor : p:1 n:0
External I Vs. U 1 : p:2 n:0 (it's connected to I phase in stator)
Inductor : p:3 n:2
Resistor : p:4 n:3
External I Vs. U 1 : p:5 n:0 (it's connected to I phase in stator)
Inductor 1 : p:6 n:5
Resistor : p:4 n:6
Voltage Source AC: p:1 n:4
External I Vs. U 1 : p:8 n:0 (it's connected to II phase in stator)
Inductor : p:9 n:8
Resistor : p:10 n:9
External I Vs. U : p:11 n:0 (it's connected to II phase in stator)
Inductor : p:12 n:11
Resistor : p:10 n:12
Voltage Source AC: p:1 n:10
External I Vs. U : p:13 n:0 (it's connected to III phase in stator)
Inductor : p:14 n:13
Resistor : p:15 n:14
External I Vs. U : p:16 n:0 (it's connected to III phase in stator)
Inductor : p:17 n:16
Resistor : p:15 n:17
Voltage Source AC: p:1 n:15
this part represents rotor:
Voltage Source AC: p:18 n:0
External I Vs. U : p:19 n:18 (it's connected to slots in rotor)
Resistor : p:0 n:19

But I have errors during multiphysics.
The DAE is structurally inconsistent.
- Variables: 17
- Equations: 16

Any help will be highly appreciated. Thanks.

0 Replies Last Post 13 août 2014, 05:34 UTC−4
COMSOL Moderator

Hello Michał Bardian

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.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content