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dc.contributor.authorLundin, Urban
dc.contributor.authorEvestedt, Fredrik
dc.contributor.authorAbrahamsson, Johan
dc.contributor.authorPérez, José
dc.contributor.authorFregelius, Martin
dc.contributor.authorNøland, Jonas Kristiansen
dc.date.accessioned2021-02-01T10:40:05Z
dc.date.available2021-02-01T10:40:05Z
dc.date.created2020-12-02T14:37:29Z
dc.date.issued2020
dc.identifier.isbn978-1-7281-9945-0
dc.identifier.urihttps://hdl.handle.net/11250/2725529
dc.description.abstractSynchronous motors are hard to line start due to torque pulsations at zero rotor speed and low starting torque when started using induced current in a damper squirrel cage. By inverting the rotor pole polarity at appropriate times it is possible to, in principle, achieve uniform torque, albeit pulsating with twice the line frequency at zero initial rotor speed. This has been demonstrated in an earlier work. In this paper we demonstrate that high torque starting using the back-emf in the field winding as triggering signal for the rotor polarity inversion is possible. We further discuss the origin of the rotational energy and active and reactive power pulsations. Finally, we show that it is possible to operate a synchronous motors at continuous asynchronous speed by inverting the polarity of the rotor current and adjusting the field current accordingly, although down rated.en_US
dc.language.isoengen_US
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en_US
dc.relation.ispartofProc. 2020 International Conference on Electrical Machines (ICEM)
dc.relation.urihttps://ieeexplore.ieee.org/document/9270780
dc.titleStart of a synchronous motor using rotor field polarity inversion and rotor back-emf sensingen_US
dc.typeChapteren_US
dc.description.versionacceptedVersionen_US
dc.source.pagenumber338-344en_US
dc.identifier.doi10.1109/ICEM49940.2020.9270780
dc.identifier.cristin1855406
dc.description.localcode© 2020 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
cristin.ispublishedtrue
cristin.fulltextpostprint
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