The influence of stacking technologies on structural dynamic properties of electric motors iron cores
ISSN: 0332-1649
Article publication date: 11 October 2021
Issue publication date: 26 August 2022
Abstract
Purpose
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/approach
A 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.
Findings
Modal 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/value
This research paper provides insights to the modal characteristics of iron cores used in electric machine and compares the influence of stacking technologies.
Keywords
Acknowledgements
The contribution of M. Jaeger to this work originated as part of the research training group GRK 1856 by the Deutsche Forschungsgesellschaft (DFG).Dedication: This paper is dedicated to the lifetime work of Professor Andrzej Demenko and Professor Lech Nowak in recognition of their contributions in the field of Electrical Machines.
Citation
Mönninghoff, S., Jaeger, M. and Hameyer, K. (2022), "The influence of stacking technologies on structural dynamic properties of electric motors iron cores", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 41 No. 5, pp. 1265-1270. https://doi.org/10.1108/COMPEL-07-2021-0247
Publisher
:Emerald Publishing Limited
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