Model Creation with DXF

The goal of the dxfsl modules is to create a complete FE model for rotating PM and Reluctance Machines on the basis of a DXF file with as little restrictions as possible. This has the consequence that symmetries, subregions, magnets, windings, boundary conditions need to be identified.

The procedure is as follows:

1. Read the DXF file and create a graph object with nodes and edges.

2. Identify the areas stator, rotor and airgap and their symmetry axis.

3. Add auxiliary lines if required by the meshing process.

4. Convert the graph object into FSL code including the identified subregions.

For monitoring and trouble-shooting purposes it is possible to create plots that display the intermediate results.

Example with a single dxf file motor.dxf:

machine = dict(
   name="Motor",
   lfe=0.001,

   dxffile=dict(
      name='motor.dxf'
   ),
   stator=dict(
      mcvkey_yoke='dummy',
      mcvkey_shaft="dummy"
   ),
   magnet=dict(
      mcvkey_yoke="dummy",
      mcvkey_shaft="dummy"
   ),
   ...

Note

• The parameters poles, outer_diam, bore_diam and airgap as well as num_slots and num_slots_gen will be set automatically

• for additional keys of dxffile see User defined Stator Slots with DXF.

Example with two separate dxf files for stator and rotor:

machine = dict(
   name="Motor",
   lfe=0.001,

   stator=dict(
       mcvkey_yoke='dummy',
       dxffile=dict(
           name='mystator.dxf',
           position='out',
           split=True
      )
   ),
   magnet=dict(
       mcvkey_yoke="dummy",
       mcvkey_shaft="dummy",
       dxffile=dict(
           name='myrotor.dxf',
           position='in',
           split=True
       )
   ),
   ...