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Machine design considerations for an MHF/SPB-converter based electric drive
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling.ORCID-id: 0000-0002-4534-921X
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling.ORCID-id: 0000-0002-6283-7661
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling.ORCID-id: 0000-0002-0744-2552
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling.ORCID-id: 0000-0002-8565-4753
Vise andre og tillknytning
2014 (engelsk)Inngår i: 2014 The 40th Annual Conference of the IEEE Industrial Electronics Society, IECON 2014, 2014, s. 3849-3854Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

This paper identifies suitable phase/slot/pole combinationsfor fractional-slot concentrated winding (FSCW)permanent-magnet machines when forming an integrated electricdrive together with a modular high frequency (MHF) converteror a stacked polyphase bridge (SPB) converter.

sted, utgiver, år, opplag, sider
2014. s. 3849-3854
Emneord [en]
Electric machines, permanent magnet, fractional-slot, winding factor, integrated
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-166564Scopus ID: 2-s2.0-84983197170OAI: oai:DiVA.org:kth-166564DiVA, id: diva2:811314
Konferanse
2014 The 40th Annual Conference of the IEEE Industrial Electronics Society, IECON 2014, Dallas, USA, 29 OCT-1 November 2014
Merknad

QC 20150520

Tilgjengelig fra: 2015-05-11 Laget: 2015-05-11 Sist oppdatert: 2017-05-30bibliografisk kontrollert
Inngår i avhandling
1. On Electric Machinery for Integrated Motor Drives in Automotive Applications
Åpne denne publikasjonen i ny fane eller vindu >>On Electric Machinery for Integrated Motor Drives in Automotive Applications
2017 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Compact, electric drives for automotive traction applications represent animportant enabler towards realizing tomorrow’s fossil free transport solutions.One attractive solution is to integrate the power electronic converter withits associated electric machinery into a single unit. This thesis, along withits appended papers, considers design and analysis of electric machinery forintegrated electric drives intended for automotive applications. Particular focusis put on permanent-magnet synchronous machines (PMSMs) with interiormountedpermanent magnets combined with modular converter topologies.In the first part of the thesis, different converter concepts and windingarrangements suitable for an integrated drive are reviewed. Compared to theconventional solution utilizing a three-phase two-level converter, a compactintegration can be implemented by physically splitting the converter and itsassociated dc-link capacitor into a number of converter submodules. Moreover,a modular concept also enables a certain level of fault tolerance.In the second part of the thesis, fractional-slot concentrated windings(FSCWs) are analyzed. First, a review for how to determine suitable slot, pole,and phase combinations is identified considering mainly the winding factor forthe main harmonic and the associated rotor losses. Then, integrated modularconverter concepts and associated winding configurations are considered andslot, pole and phase combinations that also comply with the consideredmodular converters are proposed. Further, two possible winding arrangementssuitable for the stacked polyphase bridges (SPB) and the parallel polyphasebridges (PPB) type converter are compared with respect to torque duringpost-fault operation in the event of failure of a single converter submodule.In the third part, an iterative process adopting both finite element analysisand analytical techniques is proposed for the design of PMSMs with interiormountedpermanent magnets and FSCWs. The resulting machine designsillustrate tradeoffs in terms of fault tolerance, power factor, torque density,and potential for field-weakening operation. From a given set of specifications,an experimental prototype is also designed and built.Finally, since a FSCW generally results in a large harmonic content ofthe resulting flux-density waveform, models for predicting eddy-current lossesin the permanent magnets are analyzed and compared. Particularly, modelsadopting different formulations to the Helmholtz equation to solve for the eddycurrents are compared to a simpler model relying on an assumed eddy-currentdistribution. Boundaries in terms of magnet dimensions and angular frequencyare also identified in order to aid the machine designer whether the mostsimple loss model is applicable or not. With a prediction of the eddy-currentlosses in the permanent magnets together with a corresponding thermal model,predicted volumetric loss densities exemplified for combinations of slot andpole numbers common in automotive applications are presented along withthe associated thermal impact.

sted, utgiver, år, opplag, sider
Stockholm: KTH Royal Institute of Technology, 2017. s. 55
Serie
TRITA-EE, ISSN 1653-5146 ; 2017:036
HSV kategori
Forskningsprogram
Elektro- och systemteknik
Identifikatorer
urn:nbn:se:kth:diva-207942 (URN)978-91-7729-381-1 (ISBN)
Disputas
2017-06-14, V1, Teknikringen 76, Stockholm, 10:15
Opponent
Veileder
Merknad

QC 20170530

Tilgjengelig fra: 2017-05-30 Laget: 2017-05-29 Sist oppdatert: 2017-05-30bibliografisk kontrollert

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