Menu

Discussion Forum

New Discussion
Filtrer

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.

Shorting one end of three cables

Posted 16 sept. 2014, 18:34 UTC−4 8 Replies

Akim Borbuev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hello,

I want to simulate the experiment I do in the lab. I have one ends of 3 cables energized from 3 phase source while the other ends are shorted. I am running 2D simulation, therefore, does anyone have idea how can I short one ends of the cables in 2D?

Regards,
Akim
8 Replies Last Post 22 sept. 2014, 00:34 UTC−4
Dima Apter
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 17 sept. 2014, 00:50 UTC−4
Hi,

You can use the Electric Circuit, see the attached example.

Regards,
Dima.

--
Dima Apter
A2Z Consulting Ltd.
www.a2z-consulting.com
Hi, You can use the Electric Circuit, see the attached example. Regards, Dima. -- Dima Apter A2Z Consulting Ltd. www.a2z-consulting.com

Attachments:

Akim Borbuev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 17 sept. 2014, 21:17 UTC−4
Dear Dima,

Thank you so much! I wonder what are External I Vs. U 1, Eormsxternal I Vs. U 2 and External I Vs. U 2 for? Are they for current waveforms or something else?

Best,
Akim
Dear Dima, Thank you so much! I wonder what are External I Vs. U 1, Eormsxternal I Vs. U 2 and External I Vs. U 2 for? Are they for current waveforms or something else? Best, Akim
Akim Borbuev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 17 sept. 2014, 23:56 UTC−4
And also what is the difference between External U Vs. I 1 and External I Vs. U 1?
Thank you!
And also what is the difference between External U Vs. I 1 and External I Vs. U 1? Thank you!
Dima Apter
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 18 sept. 2014, 00:41 UTC−4
"External I vs. U" connects between the FEM coil and the spice circuit.

If you open Help window within COMSOL and then click on the feature node you will get the following:
"The External I vs. U feature connects an arbitrary voltage measurement (for example, a circuit terminal or circuit port boundary or a coil domain from another physics interface) as a source between two nodes in the electrical circuit. The resulting circuit current from the first node to the second node is typically coupled back as a prescribed current source in the context of the voltage measurement."

--
Dima Apter
A2Z Consulting Ltd.
www.a2z-consulting.com
"External I vs. U" connects between the FEM coil and the spice circuit. If you open Help window within COMSOL and then click on the feature node you will get the following: "The External I vs. U feature connects an arbitrary voltage measurement (for example, a circuit terminal or circuit port boundary or a coil domain from another physics interface) as a source between two nodes in the electrical circuit. The resulting circuit current from the first node to the second node is typically coupled back as a prescribed current source in the context of the voltage measurement." -- Dima Apter A2Z Consulting Ltd. www.a2z-consulting.com
Akim Borbuev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 18 sept. 2014, 00:43 UTC−4
I greatly appreciate your help!
I greatly appreciate your help!
Akim Borbuev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 18 sept. 2014, 13:09 UTC−4
S
S
Akim Borbuev
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 18 sept. 2014, 20:10 UTC−4
Dear Dima,

Can you help me also in the following matter? My cables have metallic (aluminum) sheath and they are bonded at both ends and grounded, thus resulting in circulating currents in the sheaths. I wonder how can I model these circulating currents in the sheaths in Electrical circuits interface? Since these currents are induced and voltage between the two ends of sheaths is zero (or negligible) I cannot model them as current source or voltage source, right? Can current controlled current source be used to define sheath circulating currents?
Thanks!

Regards,
Akim
Dear Dima, Can you help me also in the following matter? My cables have metallic (aluminum) sheath and they are bonded at both ends and grounded, thus resulting in circulating currents in the sheaths. I wonder how can I model these circulating currents in the sheaths in Electrical circuits interface? Since these currents are induced and voltage between the two ends of sheaths is zero (or negligible) I cannot model them as current source or voltage source, right? Can current controlled current source be used to define sheath circulating currents? Thanks! Regards, Akim
Dima Apter
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 22 sept. 2014, 00:34 UTC−4
Probably you do not need the Electric Circuit in this case. You can try the following:
1. Build the sheaths as separate domains.
2. Define them as additional Single-Turn Coil.
3. Select "Voltage" in the "Coil Excitation" and set it zero.

Check if it will work for you.
Best Regards,
Dima.

--
Dima Apter
A2Z Consulting Ltd.
www.a2z-consulting.com
Probably you do not need the Electric Circuit in this case. You can try the following: 1. Build the sheaths as separate domains. 2. Define them as additional Single-Turn Coil. 3. Select "Voltage" in the "Coil Excitation" and set it zero. Check if it will work for you. Best Regards, Dima. -- Dima Apter A2Z Consulting Ltd. www.a2z-consulting.com

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