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Modelling antiparallel AC currents in two conductors
Posted Oct 15, 2009, 10:54 a.m. EDT Version 5.1 2 Replies
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Hello to all,
I am working on determination of resistance coefficient Rac/Rdc in two busbars, made of aluminium and copper, carrying AC current in opposite directions (the frequency range is 50/3Hz to 3000Hz).
My model works excellent when current are in same direction, but I have problem with modeling antiparallel currents in conductors.
I have used axial symmetry (2D) AC/DC module/quasi static, Magnetic/perpendicular induction current vector potential mode together with /Time harmonic analysis.
In calculation I worked with resistive heating, time average (Qav_emqa) and Total current density, norm (normJ_emqa) as variables.
Putting in subdomains (busbars) Jez=J01 and Jez= - J01 (antiparallel currents) the results are completely wrong (the Rac/Rdc coefficient does not increase with frequency)
I will be grateful for any idea (how to model currents in opposite directions), you send to me.
Thanks a lot,
Best regards
Karolina
I am working on determination of resistance coefficient Rac/Rdc in two busbars, made of aluminium and copper, carrying AC current in opposite directions (the frequency range is 50/3Hz to 3000Hz).
My model works excellent when current are in same direction, but I have problem with modeling antiparallel currents in conductors.
I have used axial symmetry (2D) AC/DC module/quasi static, Magnetic/perpendicular induction current vector potential mode together with /Time harmonic analysis.
In calculation I worked with resistive heating, time average (Qav_emqa) and Total current density, norm (normJ_emqa) as variables.
Putting in subdomains (busbars) Jez=J01 and Jez= - J01 (antiparallel currents) the results are completely wrong (the Rac/Rdc coefficient does not increase with frequency)
I will be grateful for any idea (how to model currents in opposite directions), you send to me.
Thanks a lot,
Best regards
Karolina
2 Replies Last Post Sep 23, 2015, 3:20 a.m. EDT
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Posted:
2 decades ago
Hi
Have you checked out the new entries in the "Mode Exchange" ? from Konrad Walus, University of British Columbia .
I believe you find some good suggestions there
Good luck
Ivarf
Have you checked out the new entries in the "Mode Exchange" ? from Konrad Walus, University of British Columbia .
I believe you find some good suggestions there
Good luck
Ivarf
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Posted:
9 years ago
Hi Ivar!
could you please tell me how to apply a AC current(for example sinusoida current) to a straight wire in transient analysis?I and my friends have worked for several days,but we failed,could hely me?
Expect your reply! If you can give me a case ,I wil be very appreciative!
could you please tell me how to apply a AC current(for example sinusoida current) to a straight wire in transient analysis?I and my friends have worked for several days,but we failed,could hely me?
Expect your reply! If you can give me a case ,I wil be very appreciative!