Design

Magnet topology

Choosing a new magnet topology is possible by clicking on the "Magnet shape" button. See the section “Choose part” for additional information. This opens a dialog box, allowing access to the magnet libraries.

It allows visualizing, comparing, choosing, and importing another magnet topology to modify in the current machine design.

Table 1. How to choose another magnet topology?


1 Magnet shape button allows accessing the magnet libraries to change the magnet topology.
2 Dialog box to visualize and to select the topologies of magnets from the magnet part libraries.

Inputs / Outputs

Specific inputs and outputs are considered for each magnet topology.
Note: The relevance of input parameter values can be evaluated by using the “Part Factory” application.
Table 2. Managing inputs/Outputs parameters of a part topology


1 User input parameter fields to enter the value.
2 Selecting a parameter highlights it.
2.1 Selecting a parameter displays the corresponding tooltip, which completes information about the parameter.
2.2 Select a parameter label that displays the corresponding arrow on the picture.
3 Output parameters (read only data) to complete the description of the topology.
Note: The name of the part and its original library are mentioned in this section.

Magnet physical properties

  1. List of possible elementary regions for magnets
    Here is an example of regions for an inner magnet.
    Note: The same principles apply to the outer magnet.
    Table 3. Regions for inner magnet


    1 Magnet
    2 Pole shoe
    3 Edge
    4 Bridge
    5 Web
    6 Yoke
    7 Web
    8 LOCAL coordinate system for defining the polarization of the magnet
    Note: A coordinate system is dedicated to magnets. This is what we call the LOCAL coordinate system. It is used to define the magnet’s polarization.
    • By default, a GLOBAL coordinate system is defined. Its reference point is located at the center of the rotor.
    • For spoke magnets, the coordinate system defining polarization must be along the symmetry axis. Otherwise, the polarization will not be consistent.
      Figure 1. Definition of the local coordinate system for spoke magnets


    • Magnet, Pole shoe, Edge, Bridge, Web, Yoke (illustrated above).
    • Pole core, Interpole or Hub
    • Cooling hole
    • Mechanical device to represent rivet for example
    • Ferromagnetic wedge
    • Hole or Slit
    Figure 2. 1 – Example of slit


  2. Faces and regions of slots

    This section contains a description of all the faces and regions defined and used in the magnet model.

    Each face is defined by a location point. The coordinates of these points are defined in a general coordinate system.

    The point must be within the corresponding face for all the values of user input parameters. Each face has a label and a nature. The nature of faces defines the corresponding regions.

    The physical properties of regions are linked to the materials that can be used to build them. The table below gives the physical properties of magnets.

Figure 3. Physical properties of magnet regions and associated materials


Note: When the regions are grouped (See group of regions above) the same material is associated with all the regions grouped.
Note: The possible materials associated with the regions shown above can help users to see the meaning of elementary regions.