List of Flux 2024.1 new features

To be able to create a composed non meshed coil with a lot of points and avoid to have limitation in the execution of python containing too much lines, a new type of non meshed coil has been added and called Composed coil by file import.

This new type of composed coil will be powerful:

• For Flux user, to be able to create non meshed coil without restriction on the number of definition points.
• And indirectly also by SimLab user. In SimLab, it is possible to generate a file with a list of points the neutral fiber of a body, and then use this file to create an non-meshed coil in SimLab equivalent to this new type of composed non meshed coil in Flux.

The new chapter Magnetic cores in Flux has been added in the Construction of a Flux project section of the User Guide: it presents all the possibilities offered for modelling the magnetic pieces which compose the electrical devices, like for example the rotors and stators of rotating machinery, the static and moving parts of electromechanical actuators.

In this chapter the user will find a description of the region types (with respective pros and cons) that can be employed in Flux, namely the magnetic non conducting, the laminated magnetic non conducting and the solid conductor regions. Direct links from these pages to the chapter describing the Materials are also provided, especially to inform the user about which properties (B(H) and/or J(E)) are taken into account and which hysteresis B(H) models can be applied with the different region types.

The two approaches (à priori or à posteriori) for iron loss computation are therefore introduced with their respective applicability domains, their limitations and the output quantities they provide to the user.

A presentation of the most commonly employed à posteriori model, the Bertotti one, completes the chapter: some of its specificities developed in Flux are detailed, as well as the link to the Material Identification module to get the model parameters from the measurements. And finally, the LS method with its identification module MILS is described.

Some of the contents presented in this new chapter was already available in the previous Flux versions, but dispersed over several sections. As a consequence, some legacy pages of the User Guide have been removed, since this new chapter aims at gathering all the information on the subject.

In the framework of this refactoring, the dialog boxes for the à posteriori computation of iron losses have been upgraded by rearranging the fields in a more user-friendly order: the model for losses field has been moved up, just above the list of laminated regions where to compute, and the fields time interval and part of cycle described by the time interval, which are strictly related each other, have been inverted.

Moreover, with Flux 2024.1, in the definition of the laminated magnetic non conducting regions the field thickness is no longer mandatory, because its value do not have any impact on computation results: only the stacking factor is used in Flux simulations. In other words, the field thickness should never have existed: it has been hidden in the dialog box and made optional in the python command, to guarantee its backward compatibility.