Computation of stator vibration of an induction motor using nodal magnetic forces

Sabin Sathyan, Anouar Belahcen, Juhani Kataja, Toomas Vaimann, Jan Sobra

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

14 Citations (Scopus)


In the case of rotating electrical machines, the magnetic forces acting on the stator teeth are the principal electromagnetic cause of vibrations. Based on this fact, this paper presents a method to compute the vibrations of an induction motor with the aid of magnetic nodal forces. An accurate computation of local or nodal forces is essential in problems pertaining to vibration and noise analysis of electrical machines. Virtual work method is utilized here to compute the nodal forces as the local derivative of magnetic energy from the Finite Element (FE) solution of the magnetic field problem. The magnetic problem is then coupled to an elasticity solver to calculate the displacement due to these forces. The nodal force method is implemented in an open source finite element software Elmer and the entire magneto-mechanical computation is carried out in the same open source tool. The calculated results are then compared to vibration measurements of the motor.

Original languageEnglish
Title of host publicationProceedings of the 2016 22nd International Conference on Electrical Machines, ICEM 2016
Number of pages6
ISBN (Electronic)9781509025381
Publication statusPublished - 2 Nov 2016
MoE publication typeA4 Conference publication
EventInternational Conference on Electrical Machines - Lausanne, Switzerland
Duration: 4 Sept 20167 Sept 2016
Conference number: 22


ConferenceInternational Conference on Electrical Machines
Abbreviated titleICEM
Internet address


  • electrical machines
  • electromagnetic forces
  • finite element analysis
  • magnetomechanical effects
  • open source software
  • vibrations


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