Export to Flux 3D – Induction machines with squirrel cage

Overview

The export of the project from FluxMotor to Flux 3D is now available for induction machines with squirrel cage.

The aim of this export is to provide a python file that allows us to get a fully parametrized model ready to be used in the Altair® Flux® 3D environment or to directly get into Flux 3D for solving and postprocessing the resulting 3D project.
Note: In the current version, one test can be considered: the computation of a working point defined by the Line-Line voltage, the speed and the power supply frequency.
While exporting the project from FluxMotor to Flux 3D, after having defined the project name and the folder in which it must be stored, the user has two possible choices to make:
  • Export full geometry or not. If the answer is “No”, the resulting project in Flux 3D is a reduced one in terms of periodicity based on the number of poles and the number of slots.
  • Consider half the topology along the axial direction or not. If the answer is “Yes”, only half of the topology is represented.
Note: This is possible only when all the dimensions are equal on both sides of the machine (Connection Side and Opposite Connection Side), especially regarding the end winding and the end ring dimensions.

If the answer is “No” the whole machine is represented along the axial direction. This allows us to consider the differences there can be on both sides of the machine especially regarding the end winding and the end ring dimensions.



Export project to Flux 3D environment – Export information

A dialog box is provided for defining the lengths of the stator, the rotor, and the magnets. These three lengths can be different.

The illustration below shows the resulting topology in the Flux 3D environment where the three lengths are different. This is automatically managed and built from the export area of FluxMotor.
Export project to Flux 3D environment – The stator and the rotor can have different lengths
Warning:

When a motor with a skewed topology is considered, on the rotor side or stator side, the export to Flux 3D is not possible. In that case, only the export to Flux Skew is accessible.

When the machine topology is not symmetric, especially, with the end winding lengths, the whole machine must be modeled in Flux 3D. The choice of symmetry “Yes” is not available.

In that case, end-windings can be represented with different dimensions on the “Connection Side” and the “Opposite Connection Side”.



3D modelling of the induction machine with squirrel cage: Magnetic circuit + squirrel cage + stator winding
Note:

A warning message is provided in the “Design environment” each time an asymmetric topology is defined. This is to warn the user that the default value of the export inputs dealing with the symmetry has been set to “No”. This also occurs when the asymmetry is due to the end shafts, even if the end shafts are not represented in the 3D environment.