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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…
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disappearance of Flux3D
I have been a Cedrat Flux user for 25 years, and I want to express my complete disagreement with the removal of Flux3D and its integration into SimLab. This decision is unacceptable and forces me to stop using Flux3D. I strongly disagree with your policy, and I believe this move will be as damaging as the transition from…
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What’s New in Altair® FluxMotor® 2026
Altair FluxMotor 2026 FluxMotor 2026 introduces a modern, intuitive interface that’s more than just a fresh look—it’s a smarter way to work. With harmonized inputs and streamlined interactions across all modules, designing motors has never been easier. A standout addition is the 3D motor view, giving you a clear,…
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Altair® Flux® 2026 Release Highlights
Providing the most effective workflow for your electromagnetic simulation challenges is our main goal. With Flux’s core solving capabilities now seamlessly integrated into SimLab, setting up your models has never been faster—or more intuitive. The latest advancements in Flux 2025.1 and 2026 bring great productivity tools…
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FluxMotor to Flux Magnet Loss by Joule effect
Hello Expert I have a question about magnet loss by Joule effect. Use FluxMotor 2023.1 to export motor model to Flux 2D (2023.1). When I choose Full model to export, I get magnet loss by Joule effect around 42W. However, choose Not Full model to export, also get 42w in magnet loss by Joule effect. This is 1/6 model, magnet…
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How to create Heat Flux on Optistruct
Hi, I am new to using HYPERMESH. I am trying to create heat generation and a heat sink on a meshed midsurface. For that, I have created elements. However, when I select Flux or Convection, it asks for an ELSET. I have tried several methods to create an ELSET but haven’t been able to find one. If I select some elements and…
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Evaluation of Hysteresis Losses in electric motors Under DC-biased Inductions
I would like to evaluate the iron losses in a radial flux IPM electric motor which is fed with a DC current with overimposed ripple (the neutral point is accessible). After reading some scientific articles, like this one Iron Loss Model Under DC Bias Flux Density Considering Temperature Influence, I found out that the…
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Why we can set frequency 0HZ for DC in solenoid model in CADFEKO ?
Hi, I want to know is there any way to set zero frequency in CADFEKO .
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License Support
Hi, I reset my laptop, forgetting to deactivate my license, now installing flux onto the same laptop with reinstalled altair flux, I am having issues with the license. Could I please have the license deactivated, so I can reactivate on my laptop. Kind Regards, Cayden Ninness
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Query about iteration for my design.
Hi, I am investigating the magnetic field strength of an array of magnet setup, and I have been messing around with the dimensions, shape, etc where I can iterate through parameters for my design. I would like to now iterate through different number of magnets in the system, by turning them on and off. My idea would be to,…
