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The influence of stacking technologies on structural dynamic properties of electric motors iron cores

The influence of stacking technologies on structural dynamic properties of electric motors iron... It is essential to understand the structural dynamic behavior of electrical machines to predict their acoustic and vibrational behavior. Stacking technology, which is used to manufacture soft magnetic cores, has a strong influence on the material properties. The purpose of this paper is therefore to research the influence of the stacking technologies welding and bonding with bake varnish on the modal properties of iron cores.Design/methodology/approachA finite element simulation model is developed based on homogenization of the stator core. Eigenfrequencies, modeshapes and modal damping ratios are extracted from measurements and are used to validate the simulation model.FindingsModal characteristics depend on the participation of certain material layers at a certain mode. Higher amount of shear deformation results in higher modal damping. Bonded stacks exhibit lower shear stiffness and higher damping ratios.Originality/valueThis research paper provides insights to the modal characteristics of iron cores used in electric machine and compares the influence of stacking technologies. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png COMPEL: Theinternational Journal for Computation and Mathematics in Electrical and Electronic Engineering Emerald Publishing

The influence of stacking technologies on structural dynamic properties of electric motors iron cores

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Publisher
Emerald Publishing
Copyright
© Emerald Publishing Limited
ISSN
0332-1649
eISSN
0332-1649
DOI
10.1108/compel-07-2021-0247
Publisher site
See Article on Publisher Site

Abstract

It is essential to understand the structural dynamic behavior of electrical machines to predict their acoustic and vibrational behavior. Stacking technology, which is used to manufacture soft magnetic cores, has a strong influence on the material properties. The purpose of this paper is therefore to research the influence of the stacking technologies welding and bonding with bake varnish on the modal properties of iron cores.Design/methodology/approachA finite element simulation model is developed based on homogenization of the stator core. Eigenfrequencies, modeshapes and modal damping ratios are extracted from measurements and are used to validate the simulation model.FindingsModal characteristics depend on the participation of certain material layers at a certain mode. Higher amount of shear deformation results in higher modal damping. Bonded stacks exhibit lower shear stiffness and higher damping ratios.Originality/valueThis research paper provides insights to the modal characteristics of iron cores used in electric machine and compares the influence of stacking technologies.

Journal

COMPEL: Theinternational Journal for Computation and Mathematics in Electrical and Electronic Engineering – Emerald Publishing

Published: Aug 26, 2022

Keywords: Anisotropy; Homogenization method; Electrical machine; Lamination modelling

References

  • Composite media and homogenization theory
    Dal Maso, G.; Dell’ Antonio, D.
  • Strukturdynamik unter dem Einfluß von Mikro- und Makroschlupf in Fügestellen
    Lenz, J.
  • Transfer function estimation in system identification toolbox via vector fitting
    Ozdemir, A.; Gumussoy, S.
  • Structural dynamic modeling and simulation of acoustic sound emissions of electric traction motors
    Schwarzer, M.
  • Material parameters for the structural dynamic simulation of electrical machines
    van der Giet, M.; Kasper, K.; De Doncker, R.W.; Hameyer, K.