Depuis la version 2026, Flux 3D et Flux PEEC ne sont plus disponibles.

Veuillez utiliser SimLab pour créer un nouveau projet 3D ou pour importer un projet Flux 3D existant.

Veuillez utiliser SimLab pour créer un nouveau projet PEEC (pas possible d'importer un projet Flux PEEC existant).

/!\ La documentation est en cours de mise à jour – des références au 3D peuvent subsister.

Example of application

To show our interest of the parametric distribution, let us consider a project modeling a three-phase, eight-pole permanent magnet synchronous machine (PMSM) using a Flux 2D Transient Magnetic application. This simulation will be controlled by the angular position of the rotor from 0 to 90 degrees with imposed speed which is a time dependent scenario. During the parametric distribution, Flux will compute the results for all the parameters combination for each time step.

Figure 1. Three-phase, eight-pole permanent magnet synchronous machine (PMSM) described in Flux 2D.


The goal is to do a parametric distribution over two parameters:
  • The speed which is declared as an I/O parameter controlled by the scenario and that is used by the rotating mechanical set
  • The shape of the magnet with the magnet outer arc value α set with a geometrical parameter as depicted below.
    Figure 2. Magnet outer arc parametrized with a geometrical parameter that may be selected as a varying parameter during the scenario.


Both parameters may influence the performance of the electrical machine. A table summarizing all the parameters is available below:

Tableau 1. Table summarizing the parameters, and their variation range
Magnet outer arc α (degrees) Speed (rpm)
Minimum value 130 1300
Maximum value 170 1700
Step value 10 100

According to the previous table, the number of steps to solve is about 2525 (5×5×101) with five values for the speed, five values for the magnet outer arc over a scenario with 101-time steps.

Remarque : Be aware that the time steps cannot be separated in concurrent Flux, a strong time relation between the steps is required to solve a Transient Magnetic application. This relation does not exist in the Magneto Static application.

The results yielded by different types of distribution using a different Number of concurrent Flux set in the Distribution manager are plotted in the figure below while solving the same scenario with 2525 time steps with a different value of the Number of concurrent Flux. The computation time with only 1 concurrent Flux (sequential computing) is considered as the reference and is set to 100% of the solving time.

Figure 3. Graph representing the time computation evolution in the function of the number of concurrent Flux.