Transient simulation of a wound field machine (Anti Periodic Radiator)

Numerical methods and mathematical models of Elmer
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dapu
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Transient simulation of a wound field machine (Anti Periodic Radiator)

Post by dapu »

Hi everyone,

I collected the informations in the forum and tried to make my own simulation for a wound field machine. And the the flux lines for the first time step seem right. But the problem starts at the second time step. I applied the anti radial projector for both the stator and rotor side boundary. Attached is the sif file I used. I used gmsh to generate the mesh file, I use one mesh file so I applied the discontinuous Boundary to make the mesh rotate. From my point of view, it seems the periodic boundary doesn't work after the mesh rotating. But maybe I did other things wrong in the sif file. There are no currents in the stator, in the rotor I applied the DC currents for both windings. Thanks a lot, if someone can give me a hint.

Best Regards
Dapu
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Last edited by dapu on 18 Jan 2022, 22:40, edited 2 times in total.
dapu
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Re: Transient simulation of a wound field machine

Post by dapu »

The sif file is here.
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raback
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Re: Transient simulation of a wound field machine (Anti Periodic Radiator)

Post by raback »

Hi

Usually when the symmetry projectors are anti symmetric so should the rotational one be. Maybe try with:

Code: Select all

  Anti Rotational Projector = Logical True
  Galerkin Projector = Logical True
-Peter
dapu
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Re: Transient simulation of a wound field machine (Anti Periodic Radiator)

Post by dapu »

Hi Peter,

thanks. It worked.

Best Regards
Dapu
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