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Prise en compte de DOPTPRM DISCRETE | couplage FLUX - Optistruct | Optimisation topologique
Hello, I am reaching out because I am encountering an issue during my topology optimizations. To give some context, I am coupling Altair Flux with OptiStruct to perform a magneto-mechanical topology optimization. The coupling works correctly and I am able to obtain several results. However, my goal is to modify the…
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How to reduce computation time in Simlab
Hi everyone, I am running a big simulation in Simlab and it takes a huge time to finish as it needs to go through several parameters to be completed. Does any of you have a suggestion on how to speed up the computation time? I already set the number of the cores to the maximum, but I still do not see a noticeable…
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Synchronous Machine: Short Circuit Current/Open Circuit Voltage
Is it possible to plot: Short Circuit Current / Open Circuit Voltage against the Field Current in Altair Flux/FluxMotor ?
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Sine Wave working point error
I have noticed that every time I want to run a sine wave I-Ψ-N simulation in Accurate computation mode, I get the following error: The test Working point, Sine wave, Generator, Current-Control angle-Speed failed due to the following problem: Cause : Failed to execute the flux bloc with name…
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Flux 2D to e-Machine Tool: laminated region with non-uniform material assignment
Hi, I am working with a Flux 2D model that I want to export to the e-Machine Tool. The issue is that one laminated rotor region contains local subregions with a different material assignment, so the laminated region is not uniform. e-Machine Tool seems to require a uniform material in laminated regions for iron-loss…
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Definition of Motor Inductance in Circuit
Hello everyone, I see that in tutorials an inductance in the motor circuit is defined but I do not understand how this is calculated. Could you please provide a help in calculating this value for an axial-flux motor? The inductance changes with the rotor position, so how could I already give it as input in the circuit…
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Calculate iron losses in Flux2D via Python Script
If I run the script at the bottom in Flux2D via the PyFlux Command prompt, a curve is made with the name "CURVE_LOSS_REGION_V101". If I extract the curve, I obtain the data I need. If I embed this piece of code in a Python script, the code runs smoothly and the script is ran without errors. However, the actual curve is not…
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Reporting of two bugs in Simlab electromagnetics
When I used imposed current with a parametrized current that should change over time, the current does not update over the rotation. It does with a circuit tho. When I go on solver settings→ Results request and a circuit is defined in my case, the software crashes. It does not crush if the current is given through the…
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Exterior acoustic simulation of Motor to predict SPL using Surface velocity data a input?
Hi, I have a surface velocity data of E-motor/Engine generated by third party MBD solver in .pch file format. I would like to use this data as a excitation to predict the exterior noise at 1m distance microphones. I have looked at the documentation of IE, RADSND & APML methods in optistruct. Surface velocity required for…
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Flux cannot start due to license error
Hello, I’m having a license issue and Altair Flux cannot star Flux was working normally before, but now it fails to launch due to a license error.
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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?