Two-pulse magnetization process of the NdFeB multi-pole ring magnet for BLDC motors

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dc.contributor.authorNovák, Miroslav
dc.contributor.authorFerková, Želmíra
dc.date.accessioned2020-06-29T08:11:48Z
dc.date.available2020-06-29T08:11:48Z
dc.date.issued2020-06
dc.description.abstractThe magnetization of rare earth ring magnets forming the rotor of a BLDC or a synchronous motor requires a high level of magnetization field to achieve the desired magnetization pattern. The design of the magnetizing yoke is a compromise between the field strength requirements, the yoke temperature balance and the winding forces. The two-pulse magnetization allows reaching a higher steepness of magnetization at the pole edges and thus higher overall rotor magnetization under these difficult conditions. The magnetization fixture for the double-pulse method was designed and verified by finite element method simulations. A small series (100 pcs) of produced magnets are compared with simulations using external magnetic 3D field scanning. The artifacts (asymmetry of pole magnetization) after the two-pulse magnetization are recalculated onto unbalanced magnetic pull and torque ripple. It is shown that these artifacts do not adversely affect unbalanced magnetic pull and torque ripple, unlike the asymmetries caused by the geometric inaccuracy of the magnetizer, whose impact is crucial.cs
dc.identifier.WebofScienceResearcherIDA-9898-2011 Novák, Miroslav
dc.identifier.doi10.1007/s00202-020-01003-9
dc.identifier.orcid0000-0001-9239-4120 Novák, Miroslav
dc.identifier.urihttps://dspace.tul.cz/handle/15240/157225
dc.identifier.urihttps://link.springer.com/article/10.1007/s00202-020-01003-9
dc.language.isocscs
dc.publisherSPRINGER, ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES
dc.relation.ispartofELECTRICAL ENGINEERING
dc.subjectMagnetizercs
dc.subjectMagnetizing processcs
dc.subjectPermanent magnet motorscs
dc.subjectUnbalanced magnetic pullcs
dc.subjectMagnetic field measurementcs
dc.titleTwo-pulse magnetization process of the NdFeB multi-pole ring magnet for BLDC motorscs
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