Identification of loss models from measurements of the magnetic properties of electrical steel sheets

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Belahcen, Anouar; TkT
dc.contributor.author Belkasim, Monear Ali
dc.date.accessioned 2011-12-08T09:57:03Z
dc.date.available 2011-12-08T09:57:03Z
dc.date.issued 2008
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/1123
dc.description.abstract Numerical simulations of electrical machines require good knowledge of the magnetic properties of the materials they are made of. The magnetic cores of these machines are made of electrical steel sheets, the magnetic properties of which are nonlinear and hysteretic. Moreover, the behavior of the magnetic flux density and the magnetic field strength of such materials depends on the form of the supply. In the Laboratory of Electromechanics, there are several projects which aim to model correctly the behavior of the electrical steel sheet (hysteresis, stress-dependency, losses, etc.) when used in electrical machines. For this purpose, numerical models are developed and built in an in-house finite element program package. However, knowledge of the material properties and the parameters of loss models are necessary and needs to be measured. This work is proposed to measure the magnetization curves and specific losses of an electrical steel sheet. The measurements were carried out using a device specially designed for this purpose and adequate programs for field control. The measurements were conducted under rotating and alternating magnetic fields at different fundamental frequencies and amplitudes. The results of the measurements consisted of a large amount of data that has been analyzed, processed and presented in an appropriate manner. Moreover, the parameters of the loss models were estimated from the measurements through identification procedures that have been written and constructed in MATLAB software. The conclusions of this work provide the basis for a better understanding of the parameters needed to improve loss models. en
dc.format.extent 97
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.subject.other Electrical engineering en
dc.title Identification of loss models from measurements of the magnetic properties of electrical steel sheets en
dc.type G2 Pro gradu, diplomityö fi
dc.contributor.school Faculty of Electronics, Communications and Automation en
dc.contributor.school Elektroniikan, tietoliikenteen ja automaation tiedekunta fi
dc.contributor.department Department of Electrical Engineering en
dc.contributor.department Sähkötekniikan laitos fi
dc.subject.keyword magnetic properties en
dc.subject.keyword electrical steel sheets en
dc.subject.keyword hysteresis losses en
dc.subject.keyword rotational field en
dc.subject.keyword loss modeling en
dc.subject.keyword loss-models identification en
dc.identifier.urn urn:nbn:fi:tkk-012787
dc.type.dcmitype text en
dc.programme.major Electromechanics en
dc.programme.major Sähkömekaniikka fi
dc.programme.mcode S-17
dc.type.ontasot Diplomityö fi
dc.type.ontasot Master's thesis en
dc.contributor.supervisor Arkkio, Antero; Prof.
dc.programme Elektroniikan ja sähkötekniikan koulutus-/tutkinto-ohjelma fi
dc.location P1 fi


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