Error: Current Leaks to the Air

  • Last Post 30 January 2020
pabiri posted this 05 September 2018


I'm having issues running my simulation since I've upgraded to EM Suite 19.1. My simulation (inductive power transfer between 2 antennas) was running without errors previously but is now giving me the error "current leaks to the air." I've tried re-creating the model and re-doing everything, but am having the same issue.

I've also tried running the simulation with the transmitter-only and receiver-only and the issue seems to only persist with the receiver present. I have a current excitation setup with one face in a looped coil:

Snashot of Simulation Page

Would really appreciate any help!!

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Mark Solveson posted this 06 September 2018

A few suggestions:  

In the Initial Mesh Settings (Mesh Operations -> Initial Mesh Settings...)
Try unchecking the apply curvilinear meshing to all curved surfaces
And/Or, Change to Classic Mesh


pabiri posted this 08 September 2018

I tried both options but the problem persists.

alexa410 posted this 12 July 2019


Did you solve this error? If yes, how? I get the same error even though the when I verify the model there are no issues and I haven't done anything different compared to other simulations. I have two planar coils placed at 2mm one from another and each has a current excitation of 1 Amp. 

thank you

pabiri posted this 16 January 2020

Sorry, I never did. I just ended up using the old suite.

pblarsen posted this 30 January 2020

In recent versions (2019R1 and higher), this message often relates to an incorrect excitation (or at least perceived by the solver).  User pabiri looks like their model excitation is set up correctly, so the problem is either due to an issue in R19.1 (an older version now), or due to the meshing being perceived as incorrect.  Hopefully that explanation helps alexa410 also.

In addition to Mark's suggestions, I would add the following suggestions:
1) In general, I would suggest to make sure that the excitation cross-section matches the conductor cross-section exactly.
2) In general, I would suggest to make sure that if multiple current assignments are used on a conductor that they match correctly (pointing in the correct directions).  And that the current either correctly goes in a loop, or it has an input/output definition that terminates on the boundary.
3) In the Initial Mesh Settings options, try adjusting the slider bar for Curved Surface Meshing further to the right (finer mesh, with larger total mesh count).
4) Try selecting all the surfaces of the conductor and assign an Insulating boundary.
5) You can always check that all 3D objects have the properties "Model" and "Solve Inside" checked.