Simulation of an Induction Motor’s Rotor After Connection

Transients have proven to be a specially demanding operation mode for rotor cages in induction motors. The combination of thermal and mechanical stresses causes damage in weak points of the secondary circuit of these machines. A 3-D multiphysics computation may shed some light into the conditions under faults, such as broken bars developing, while taking into account phenomena as interbar currents. With the aim of reducing the computational cost involved, this paper carries out a 3-D simulation of just the rotor during the first 2.5 cycles after a direct-on-line connection, with the tangential component of the magnetic vector potential mapped on its iron surface from the results obtained by the 2-D locked rotor finite-element simulation. The results provide an insight into the skin effect and mechanical loads in the cage, a magnetic coupling between the end ring and the shaft, as well as the limitations of the weakly coupled magnetoelastic analysis.

Keywords

Electromagnetic transients, fault diagnosis, induction motors, magnetomechanical effects, rotors

DOI

10.1109/TMAG.2017.2662713

Citation

Climente-Alarcon , V , Sundaria , R , Panchal , J & Arkkio , A 2017 , ' Simulation of an Induction Motor’s Rotor After Connection ' , IEEE Transactions on Magnetics , vol. 53 , no. 6 , 8202304 . https://doi.org/10.1109/TMAG.2017.2662713

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201902251910

Collections

[article-cris] Sähkötekniikan korkeakoulu / ELEC

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