dc.contributor.author | Frédéric, Maurer | |
dc.contributor.author | Nøland, Jonas Kristiansen | |
dc.date.accessioned | 2021-11-03T07:25:57Z | |
dc.date.available | 2021-11-03T07:25:57Z | |
dc.date.created | 2021-10-20T13:47:16Z | |
dc.date.issued | 2021 | |
dc.identifier.citation | IEEE transactions on energy conversion. 2021, . | en_US |
dc.identifier.issn | 0885-8969 | |
dc.identifier.uri | https://hdl.handle.net/11250/2827401 | |
dc.description.abstract | The Roebel bar conventional design of large AC machines uses the classical strand-slot inductance model (CSSIM). Suitable alternatives are missing as the CSSIM is favored for its inherent simplicity based on the ideally permeable iron core hypothesis. However, saturated armature slots can lead to high variations of the slot inductance, where the CSSIM cannot represent this precisely. An accurate prediction of the strand inductances is crucial when optimizing the transpositions of large Roebel bars to be competitive on efficiency and low measurement tolerances. This fact is crucial in under-roebeling, having less than a 360-degree transposition over the active part. In the end, the goal is to compensate the winding overhang parasitic field with the slot-parasitic field. This paper proposes a differential strand-slot inductance model (DSSIM) based on the concept of differential inductance (DI). It is compatible with a circuital lumped-element model (LEM) that considers the strand topology, geometrical dimensions, saturation level, and small- scale effects. Numerical simulations showcase the performance improvement of the DSSIM against known models. Finally, a 20- strand prototype of a slot model with actual Robel bar strands corresponding to a simplified bar cross-section in a large AC machines slot demonstrates the presented DSSIMs precision. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Institute of Electrical and Electronics Engineers (IEEE) | en_US |
dc.relation.uri | https://ieeexplore.ieee.org/document/9580725 | |
dc.title | A Differential Strand-Slot Inductance Model for Improved Compensation of Circulating Currents in the Core Part of Large AC Machines | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | acceptedVersion | en_US |
dc.rights.holder | © IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. | en_US |
dc.source.pagenumber | 12 | en_US |
dc.source.journal | IEEE transactions on energy conversion | en_US |
dc.identifier.doi | 10.1109/TEC.2021.3121310 | |
dc.identifier.cristin | 1947294 | |
cristin.ispublished | true | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |