Since version 2026, Flux 3D and Flux PEEC are no longer available.

Please use SimLab to create a new 3D project or to import an existing Flux 3D project.

Please use SimLab to create a new PEEC project (not possible to import an existing Flux PEEC project).

/!\ Documentation updates are in progress – some mentions of 3D may still appear.

SimLab Tutorial: Multiphysics (EM-NVH): step-skew multispeed

Description

This study case will present how to run a multi-speed EM-NVH analysis of an eMotor with rotor step-skewing. First, the motor is electromagnetically modeled and analyzed using the MTSkew solution. Then, the electromagnetic force at each speed is imported into the 3D motor model and analyzed using the MFR (modal frequency response) solution to get the waterfall plot.

Part1: Transient magnetic analysis

Both the step skewing settings and multi-speed working point settings can be configured when creating a transient magnetic solution.

The electromagnetic simulation results (part model view and full model view) are shown as below:

Part 2: Modal frequency analysis

After completing the transient magnetic simulation, the solution coupling in SimLab can be used to realize automatic force mapping from the electromagnetic solution to the NVH solution.

The vibration simulation result (multi-speed waterfall plot) is shown as below:

Example access

All files corresponding to this example are accessible in the following link: Tutorial package.

Note: The tutorial packaging may evolve with each new version, but not mandatory. The latest version of the tutorial package will automatically work with the most recent release of SimLab.

Example: After installing the SimLab 2025 release, you can find the latest Tuto_2024.zip package. This means that the tutorial has not been updated since 2024 release, that the tutorial does not need to be updated, and that the tutorial still works in 2024.1 release and 2025 release.

Step to follow:

  • to follow the example step by step, the corresponding files are in "Example_name_StepByStep" folder containing:
    • Input folder: contains initial *.slb databases an other files needed to be able to play manually the tutorial by following the step by step document
    • Output folder: empty (contains the obtained results after to play the tutorial)
    • Tutorial folder: contains the document describing the example step by step
  • to play the tutorial by scripts, the corresponding files are in "Example_name_PlayScripts" folder containing:
    • Input folder: contains initial *.slb databases an other files needed to be able to run scripts of the tutorial
    • Output folder: empty (contains the obtained results after to play scripts of the tutorial)
    • ScriptsTutorial folder: contains script files to be able to play each analysis