Magnetic forces and magnetostriction in rotating electrical machines

Ghalamestani, Setareh Gorji; Vandevelde, Lieven; Melkebeek, Jan

doi:10.1109/icelmach.2016.7732840

Cited by 9 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The change in length for the direction aligned with the magnetic field is different from the same effect in perpendicular direction [8], [9]. This is due to the shape of magnetic domains of material and the lamination of magnetic core [10].…”

Section: Magnetostriction Effectmentioning

confidence: 99%

Magnetostrictive Vibration Model for Evaluation of Mechanical Integrity of Power Transformer Magnetic Core

Marks

Vītoliņa

Dirba

2019

Latvian Journal of Physics and Technical Sciences

View full text Add to dashboard Cite

Magnetostriction process creates vibrations within magnetic core of a power transformer. This effect can cause delamination of magnetic core layers and increase the vibration amplitudes on the surface of transformer tank. In this paper, a magnetostrictive vibration model is proposed for improved evaluation of the mechanical integrity of magnetic core and the finding of possible mechanical defects. This model is based on the simulation of magnetostrictive vibrations by replacing the magnetic core with mass and spring system, and application of a dynamic genetic algorithm in order to find the necessary system configuration. A case study is provided structurally modelling magnetic core in Matlab and Matlab Simulink with the analysis of simulated vibrations that indicate a possible mechanical defect.

show abstract

Section: Magnetostriction Effectmentioning

confidence: 99%

Magnetostrictive Vibration Model for Evaluation of Mechanical Integrity of Power Transformer Magnetic Core

Marks

Vītoliņa

Dirba

2019

Latvian Journal of Physics and Technical Sciences

View full text Add to dashboard Cite

show abstract

“…That is where strain responses to temperature and the magnetic field, known as thermal expansion and magnetostriction, respectively, play a key role. Any strain (shrink or stretch) of the core material can strongly affect the performance of electrical machines [28–31]. For example, if the rotor/stator core material stretches, then the air gap narrows and consequently the torque ripple, noise, and vibration increase.…”

Section: Introductionmentioning

confidence: 99%

Low‐loss and lightweight magnetic material for electrical machinery

Ahmadi¹,

Sözer²,

Donahue

et al. 2020

IET Electric Power Applications

View full text Add to dashboard Cite

A low‐loss and lightweight core material, with applications in electrical machinery, is made of highly packed and insulated magnetic microwires (MWs). These MWs are aligned in such a way as to guide the flux in the rotor/stator, with the ultimate goal of increasing the efficiency and substantially reducing core losses. Commercial normalFebalnormalNi29normalCo17‐based MWs with a 127 μm diameter and a 33 μm insulation coating are utilised. The magnetic measurements of the fabricated sample demonstrate the high permeability and low core loss in a wide range of frequencies. To prove the utility of this type of material, the authors used it in the rotor core of a prototype 25 W three‐phase synchronous reluctance machine. The core is lighter and the losses are significantly lower than in conventional core materials under the same torque density.

show abstract