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Best way to parametrize electric motor?
Hello, I am designing an electric motor and I am looking for the best solution to parametrize my model in order to study the effect of several geometrical lengths in my design. At the moment I am working with SolidWorks, but SimLab does not allow me to change its geometry in a parametric way. Therefore, every time I want…
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What does this symbol mean?
Hi, When I volume mesh my body, I get that a volume gets this symbol after meshing. Could someone understand me what it means? All other bodies get a 3d shape next to their name, but only the air of my motor (cavity1) gets this blue 2d shape next to its name.
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Circuit Designer not working in SimLab v2026
Hello community, today i tried to follow some tutorials for SimLab with Flux for transient Simulations. Therefore it is needed to use the Circuit Designer to setup the Current Source. Unfortunately it is not possible to move, edit by double click, delete, wire or move the Circuit Components. Things I already tried without…
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Upcoming Community Electromagnetics Chat: Advanced Winding Modeling and Selection in FluxMotor
Are you an eMotor designer or a FluxMotor user looking to push the boundaries of performance and make smarter design decisions? Then you won't want to miss our next Community Electromagnetics Chat Series session on February 19, 2026 at 10 AM Eastern Time. Join us for an in-depth technical session on "Advanced Winding…
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Does the Torque output already account for internal losses in 2D transient magnetics in Simlab ???
Hello Community, I have recently completed a 2D Transient Magnetic simulation in SimLab for a high-speed motor. My goal is to determine the final output power, but I am seeking clarification on how the flux solver handles different loss components in relation to the calculated torque. Setup & Results: Software: SimLab 2D…
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Litz wire modelling in 2D transient magnetics in Simlab
Hi, I am currently working on a 2D transient magnetic model of an electric motor in SimLab. I am trying to model the stator winding using a Litz wire representation. Here is what I have done so far: Created the motor geometry in 2D. Constructed the Litz wire cross-section (multiple strands inside one slot). Merged all…
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Magnetic flux density plot
How do i create a sinusoidal a path for an axial flux machine to estimate for the magnetic flux density ?
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Penalization SIMP topology optimization in Flux v2024
Hello, I am reaching out to clear a few doubts on the way topology optimization is implemented in Flux v2024. When using the SIMP method, what is the penalization applied to? Relative permeability, reluctivity or something else? If possible, I would also like to know the interpolation scheme used for the parameters(s). In…
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Circuit Designer not working as intended in SimLab v2026
Hello community, today i tried to follow some tutorials for SimLab with Flux for Magnetic AC Simulations. Therefore it is needed to use the Circuit Designer to setup the Current Source. Unfortunately it is not possible to move, edit by double click, delete, wire or move the Circuit Components. I also tried SimLab v2024.1 -…
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Getting result from Flux2D to matlab
I've a model in flux 2022.3 that I'm trying to drive from matlab. So far I can open then model and do a computation and all works fine. The problem is when I try and export the value to matlab i just get a java error from matlab. The code I've used is shown below. I did try to do this without saving the value, but that…
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Trying to get started again with driving flux from Excel, but not working using example
Having not used the excel automation for flux for a few years trying to get going again using Flux 2022.3 or Flux2024 (have both installed), but neither seems to be working. Opening the example flux_mp.xlsm gives runtime error 40036 and clicking debug highlights line Call Sheets("Feuil1").initDllFlux Any ideas of things to…
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How to define manual Time Settings in SimLab 2D Transient Magnetic?
Hi everyone, I am currently working on a motor project using SimLab 2D Transient Magnetic analysis. I am trying to implement a custom speed profile where the motor runs at a lower speed for a certain period and then accelerates. To do this, I need to adjust the Stop Time and the Time Step manually. However, I am…
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Magnetic circuit not detected, connectivity
Hi everyone, I get this error when trying to run my simulation: Impossible to detect the magnetic circuit composed by the following bodies: pole_1 These bodies do not respect the connectivity. In order to execute a magnetic circuit cuts check on these bodies, please unmerge them and then you can merge them by groups of…
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Error activating license: This license was already activated using different HostIDs.
Hello, I'm using Flux software. And after initializing my pc, there is an error like above. I forgot to deactivate license before reset, so I want to know there is any way to solve this error. I use the exact same pc, ip is also same, so one and only error is reset without deactivating license.
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Preisach model under FLUX
Hello ! I am trying to use the Preisach model under flux control to model a hysteretic material. Is it possible to calculate iron losses using this Preisach model? Could I have some information on how these losses are calculated?
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Convergence tolerance topology optimization in Altair Flux v2024.
Goodmorning, I'm reaching out to the community to address an issue referred to a parameter for topology optimization in Flux 2024. When setting up a topology optimization, in the part of the optimization options there's a field where the optimization tolerance can be set. The default value is 0.5%. But when I change it and…
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Student license key is not activated
Hello, I'm using Altair Flux and FluxMotor by student license. I've activated them with above image before, but after changing pc, one day my license is rejected like this image. So I've tried re-install 2. re-Authorization 3. run as administrator and none of these worked. Also I deactivate license at previous pc, so I did…
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SimLab Transient Magnetic 3D Motion Issue
I am modelling a permanent magnetic coupling. Unfortunately for IP reasons I cannot share the analysis file. The outer coupling has a motion as defined below, with the max time as one cog in the coupling. When I try to run the model, I receive the attached error log stating there is not a value in the Ang Pos of the…
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SimLab Flux Motion Issue
I currently am having an issue with using SimLab Flux solver. I have attached the error log text file that I received. I cannot provide the model due to IP however I am trying to model a permanent magnet coupling in order to find torque and loss. I have added a motion to the outer part with values shown below. In the error…
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Flux 2024 Topology optimization through PyFlux
Hello, I have a question related to topology optimization in Flux 2024. I would like to launch the optmization manually, by writing a .py script and running it in the Python editor zone of Flux. I need to run it manually because I would like to use an input .fem file that is not automatically generated, rather written by…
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How to create custom Stator from Simlab and then export it in Fluxmotor to check the performance ??
Hello Altair Community, I am currently developing a high-speed permanent magnet motor using SimLab 2025 and FluxMotor 2025. Due to the highly specific nature of our stator and rotor laminations, I am moving away from standard templates. I have successfully created the custom geometry within the SimLab Sketcher environment…
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Unexpected crash, any help or explanation?
I was running several transient magnetic 2D cases, varying the d-axis current level in a permanent magnet motor. There were about 155 (31 x 5) cases to perform, which I automated using PyFlu. After running about 120 cases, the program simply crashed, without any message, after a saveProjectAs(case_name) command. I'm…
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Display Issue with FluxMotor and Flux Supervisor (all version 2024-> 2026)
Hello, Currently, when using FluxMotor, I am encountering a display issue with FluxMotor and Flux Supervisor (as shown in the attached image), which causes inconvenience during simulation. I am currently using a workstation with three monitors. I have tried using each monitor individually, but the issue still occurs. I…
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Altair Flux 2024 Topology optimization - definition of mechanical problem
Good morning, I'm performing a Topology optimization in Altair Flux 2024. I'm working with a SPMSM electric motor and i have a doubt about how to model the mechanical problem for the optimization. I defined the rotor as mechanical region, with E, nu, and rho. Then I set the boundary condition: Fixed for all the DOFs at the…
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Flux 2024 Topology optimization - definition of element densities
Goodmorning, I'm working with Altair Flux 2024 with topology optimizations. I performed an optimization of the rotor of a SPMSM and I would like to perform another topology optimization on the previous design result. In particoular I would like to use the same densities of the design produced by the first optimization as…
