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Reluctance network for analysing induction machines

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Perho, Jarmo
dc.date.accessioned 2012-02-10T09:44:20Z
dc.date.available 2012-02-10T09:44:20Z
dc.date.issued 2002-12-12
dc.identifier.isbn 951-22-6090-5
dc.identifier.issn 0001-6845
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/2247
dc.description.abstract This thesis presents the components, the construction rules and the equations of the reluctance network used in the analysis of an electrical machine. It defines the equations to form the components of a single-phase electric equivalent circuit from the results of a reluctance network. As part of the study, a computer program has been developed to solve a two-dimensional reluctance network. As a result, the flux and current distributions are calculated for a cage induction motor. The rotor construction with a single-cage and double-cage winding is studied. From the analysis results, a single-phase equivalent circuit is defined to calculate the locked-rotor current of the motor in the steady-state period after the inrush current, at the moment when the rotor starts to rotate. The target in the study is to develop a single-phase equivalent circuit for a starting motor with the effects of iron saturation and eddy-current losses included. The leakage-flux paths of the core in the rotor have their own reactances and iron-loss resistances in the single-phase equivalent circuit. The cumulative influence of the main and leakage fluxes on the magnetic saturation of the machine cross-section is taken into account by using a reluctance model covering the whole cross-sectional area of the machine. The components for the equivalent circuit are defined from the energy distribution over a period in steady-state condition. In the analysis program, damping caused by leakage reactance of the end-windings in the stator and rotor is excluded from the model equations. Only the resistances of the windings are included to limit the supply current. en
dc.format.extent 147
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Helsinki University of Technology en
dc.publisher Teknillinen korkeakoulu fi
dc.relation.ispartofseries Acta polytechnica Scandinavica. El, Electrical engineering series en
dc.relation.ispartofseries 110 en
dc.subject.other Electrical engineering en
dc.title Reluctance network for analysing induction machines en
dc.type G4 Monografiaväitöskirja fi
dc.description.version reviewed en
dc.contributor.department Department of Electrical and Communications Engineering en
dc.contributor.department Sähkö- ja tietoliikennetekniikan osasto fi
dc.subject.keyword leakage reactance en
dc.subject.keyword reluctance network en
dc.subject.keyword cage induction motor en
dc.subject.keyword starting en
dc.subject.keyword single-phase equivalent circuit en
dc.identifier.urn urn:nbn:fi:tkk-002176
dc.type.dcmitype text en
dc.type.ontasot Väitöskirja (monografia) fi
dc.type.ontasot Doctoral dissertation (monograph) en
dc.contributor.lab Laboratory of Electromechanics en
dc.contributor.lab Sähkömekaniikan laboratorio fi
local.aalto.digifolder Aalto_64538
local.aalto.digiauth ask

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