BPM Overlay

How to use the 3D Overlay BPM?

To use the 3D Overlay BPM please follow these steps:

Step Action
1 Open a new Flux project and leave the Modeler context

Click on Extensions > Overlay > Load a certified overlay:


Choose the Overlay to load:



General data > BPM Motor

Right click on New:


Once the BPM Overlay is loaded you must:

  • Give the geometric parameters (Iron length, outer radius rotor and stator, slot height, magnet thickness…)
  • Choose mesh type (automatic, extrusive) and infinite box
  • Choose the stator slot shape, permanent magnets, stator yoke…
  • Position of the permanent magnets (surface, insert and interior)
  • Choose winding type (concentric and lap)


As output, Flux creates the machine with: periodicity, symmetry, mesh, winding, mechanical sets and volume regions


The user can modify the geometry, the mesh and the winding.

To do it: Project > Overlay > Run

Right-click on Edit


  • In the case of extrusive mesh, if you change the structure of your geometry outside the overlay, it is recommended to assign an extrusive mesh for all volumes.
  • If symmetry is taken into account, we recommend to enter ½ of the actual length of the stator, the rotor and the magnet in the Oz direction.
  • If a circuit is needed, once your geometry is created with the winding via the 3D Overlay, 3 non meshed coils and 3 Coilconductor components are created.
    • Create your circuit with 3 new CoilConductor components
    • Manually assign the new CoilConductor components to the non meshed coils
    • Delete the Coilconductor components created by the Overlay