Step skew technology available

Overview

Step skew technology is available to design the inner rotor of the Synchronous Machines with Permanent magnets.

This completes the existing magnet skew topologies. The first one was the "Continuous skew".

A user-friendly interface allows to define and visualize the topology of the step skew topology to be designed.

Once the machines with step skew topologies are designed, in the back end of Motor Factory, the computations are performed in Flux Skew environment to get a better accuracy of results. It can also be exported to Flux Skew for advanced analysis.



Design the step skewed magnets

Three kinds of step skew topologies are available: “V” shape, Regular, and "random".

Note: The step skew is available for both kind of Synchronous Machines with Permanent magnets with inner and outer rotor.

However, the step skew can be applied only to the magnet.

Note: The user can add a skew angle on the rotor (continuous or step) or on the stator (continuous). If a skew is already defined in the stator when setting a skew on the rotor, the stator skewing will be automatically reset to “None”.

Illustrations of all the available topologies are given below.

Regular definition mode
The magnets are positioned according to a straight line all along the longitudinal direction of the rotor part.
“V” shape definition mode
The magnets are positioned according to the “V” shape all along the longitudinal direction of the rotor part.

In both cases, the mode of the skewing can be defined according to the stator slot pitch ratio, the rotor pole pitch ratio or a shift angle.

The number of layers is defined as an input.



Define a linear step skew with the “Regular” definition mode (1) Or a V shape step skew with the “V” shape definition mode (2)

Custom definition mode
The magnets are defined and positioned according to the values (Thickness and shift angle) written in a table (see illustration below).
Note: The table where thicknesses and shift angle values are written can be imported via an Excel file.



Customization of the step skew topology with the “Custom” definition mode (1) Dialog box to define the thickness and shift angle to build the customized step skew topology (2)