Optimization of the production of rotating machines with finite element method

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Dr. Vajda István
Department of Electric Power Engineering


Due to rotation, significant mechanical stresses affect to the windings of the rotors of the rotating machines. The forces which affect to the locking of the windings should be scanned, because the windings can be moved due to the centrifugal force caused by the rotation.

The subject of this document is examining the forces which affect to the winding lockings with numerical methods.

In the first chapter we can acquire knowledge about the structure of the asynchronous motors, including the elements of the rotor and the stator, as well as the evolving of the squirrel-cage and slip ring rotors. The end of this chapter we can investigate the different ways of the winding developing.

Furthermore we can get a description of the ways of the winding fixation. I expounded the different types of the wedges and bandages, and the most important formulas about the forces, the torque and stresses.

In the next chapter I made a simulation about the mechanical stress in the winding lockings caused by the centrifugal force. I compared the results of the simulation and the manual calculations and I identified that the numerical method is suitable to calibrate the windings locking.

Finally I mentioned what other purposes are there which can be achieved with the finite element method softwares.


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