eddy current losses in stator screw with FLUX 2D 2022.3

An Nguyen

Hi everyone,

Has anyone done a study about eddy current in stator screws with FLUX 2D? Can you please share me some experience?

There are what i did:

- a circle draw

- material, region, mesh modify ( I consider that the screws are made from aluminum with permeability mu_r ~1)

- I modify the circuit with a additional branch (which is similar to calculate the eddy current in magnets).

- simulation, set a sensor and evaluate it.

-> here is what i got:

- The losses are neglected.

Did i do the study in correct way? I couldn't find any research about it

 

Thanks a lot in advance!!

Best Regard

Nguyen

SimonGuicheteau

Hello

If we consider the screws only as a vertical conductor in an open circuit then I guess considering them like we do with the magnets is correct. The value of losses seems really small so I guess this is negligible.

If the current actually flows through the screws and other parts, there might be some 3D effect. I've worked on cases where there were currents created by the end windings close to the bearings. This needs to be studied in 3D to be fully analysed and is probably hard to set up and solve. If there is no reason to look at it it is probably not worth looking at it. In my case, the user measured some hot spots on the bearings and wanted to explain this.