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Design of a PM synchronous motor for an integrated light EV motor drive application.
Thesis (PhD)--Stellenbosch University, 2024.
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Stellenbosch : Stellenbosch University
2025
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| _version_ | 1867613900111872000 |
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| access_status_str | Open Access |
| author | Pastellides, Stavros George |
| author2 | Wang, R. J. |
| author_browse | Pastellides, Stavros George Wang, R. J. |
| author_facet | Wang, R. J. Pastellides, Stavros George |
| author_sort | Pastellides, Stavros George |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description |
Thesis (PhD)--Stellenbosch University, 2024. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/131884 |
| institution | Stellenbosch University (South Africa) |
| last_indexed | 2026-06-10T12:43:29.289Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/131884 Design of a PM synchronous motor for an integrated light EV motor drive application. Pastellides, Stavros George Wang, R. J. Kamper, M. J. Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Electric vehicles Motor vehicle industry -- Technological innovations Electric motors, Synchronous Permanent magnet motors UCTD Thesis (PhD)--Stellenbosch University, 2024. ENGLISH ABSTRACT: Light electric vehicles (LEVs) have gained prominence as an appealing mode of transportation across diverse driving conditions. The development of these vehicles is driven by the pursuit of enhanced efficiency, reduced volume, and cost-effectiveness. This burgeoning interest in LEVs has prompted the exploration of various drive train options to meet these evolving requirements. This dissertation is dedicated to the investigation and design of a PM synchronous motor specifically tailored for light electric vehicle applications, and ensuring an ease of integration with the other components of the electric drive train. The integral components of the proposed integrated motor drive encompass the magnetic gear, electric motor, and electric drive system, with the electric motor serving as the heart of the system. Many types of design choices are available for the electric motor, and difficulty is generally found on the design optimisation for traction application. Therefore the focus of this dissertation revolves around these design choices, and correctly implementing an optimisation method in order to find a cost effective design. Further, research has shown that certain methods exist in order to achieve high speed applications for traction motors. While existing research emphasizes high-speed traction motor applications using V-shaped rotor designs and intricate control strategies, this work advocates for a more cost-effective solution through the utilization of a surface-mounted permanent magnet (SPM) motor capable of achieving optimal speeds for the particular application. A thorough exploration of various topologies, including rotor choices and winding layouts, for light electric vehicles is undertaken and systematically compared. The findings reveal that a cost-effective SPM motor with an overlapping winding and SPM rotor choice can achieve an extensive high-speed range without compromising on the cost efficiency. This design choice undergoes further scrutiny through unique optimisations employing finite element analysis and a driving cycle approach. A novel flux mapping method is developed, leading to the identification of elongated stator teeth as a strategic enhancement. This design modification improves synchronous inductance, consequently enhancing field-weakening capabilities and thermal efficiency. The culmination of this work emphasizes the effectiveness of the optimisation strategy, demonstrating how an extended field-weakening range can be attained by increasing the slot tooth region. This research contributes valuable insights into achieving a balance between cost-effectiveness and a high-performance design, shedding light on the potential of surface mounted PMs for electric motors to be implemented within light electric vehicles. AFRIKAANSE OPSOMMING: Ligte elektriese voertuie (LEVs) het prominensie verwerf as ’n aantreklike vervoermiddel oor uiteenlopende rytoestande. Die ontwikkeling van hierdie voertuie word gedryf deur die strewe na verbeterde doeltreffendheid, verminderde volume en kostedoeltreffendheid. Hierdie groeiende belangstelling in LEVs het die verkenning van verskeie dryfkragopsies aangespoor om aan hierdie ontwikkelende vereistes te voldoen. Hierdie proefskrif is gewy aan die ondersoek en ontwerp van ’n PM-sinchroniese motor wat spesifiek vir ligte elektriese voertuigtoepassings aangepas is, en om ’n gemak van integrasie met die ander komponente van die dryftrein te verseker. Die integrale komponente van die voorgestelde ge¨ıntegreerde motoraandrywing sluit die magnetiese rat, elektriese motor en elektriese aandryfstelsel in, met die elektriese motor wat as die hart van die stelsel dien. Baie soorte ontwerpkeuses is beskikbaar vir die elektriese motor, en probleme word oor die algemeen gevind in die ontwerpoptimalisering vir vastraptoepassing. Daarom draai die fokus van hierdie proefskrif om hierdie ontwerpkeuses, en die korrekte implementering van ’n optimeringsmetode om ’n koste-effektiewe ontwerp te vind. Verder het navorsing getoon dat sekere metodes bestaan om ho¨espoedreeks vir traksiemotors te bereik. Terwyl bestaande navorsing ho¨espoed traksiemotortoepassings beklemtoon deur V-vormige rotorontwerpe en ingewikkelde beheerstrategie¨e te gebruik, pleit hierdie werk vir ’n meer koste-effektiewe oplossing deur die gebruik van ’n SPM motor wat in staat is om optimale snelhede te bereik vir die spesifieke toepassing. ’n Deeglike verkenning van verskeie topologie¨e, insluitend rotorkeuses en kronkeluitlegte, vir ligte elektriese voertuie word onderneem en sistematies vergelyk. Die bevindinge toon dat ’n kostedoeltreffende SPM-motor met ’n verspreide wikkeling en SPM-rotorkeuse ’n uitgebreide ho¨espoedreeks kan bereik sonder om die kostedoeltreffendheid in te boet. Hierdie ontwerpkeuse word verder ondersoek deur unieke optimaliserings wat eindigeelementanalise en ’n dryfsiklusbenadering gebruik. ’n Nuwe vloedkarteringmetode word ontwikkel, wat lei tot die identifikasie van verlengde statortande as ’n strategiese verbetering. Hierdie ontwerpmodifikasie verbeter sinchroniese induktansie, wat gevolglik veldverswakkingsvermo¨ens en termiese doeltreffendheid verbeter. Die hoogtepunt van hierdie werk beklemtoon die doeltreffendheid van die optimaliseringstrategie, wat demonstreer hoe ’n uitgebreide veldverswakking bereik kan word deur die gleuftandgebied te vergroot. Hierdie navorsing dra waardevolle insigte by in die bereiking van ’n balans tussen kostedoeltreffendheid en ’n ho¨eprestasie-ontwerp,en werp lig op die potensiaal van oppervlakgemonteerde PM’s vir elektriese motors om binne ligte elektriese voertuie ge¨ımplementeer te word. Doctoral 2025-04-07T09:08:29Z 2025-04-07T09:08:29Z 2024-12 Thesis https://scholar.sun.ac.za/handle/10019.1/131884 Stellenbosch University xxiii, 183 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Electric vehicles Motor vehicle industry -- Technological innovations Electric motors, Synchronous Permanent magnet motors UCTD Pastellides, Stavros George Design of a PM synchronous motor for an integrated light EV motor drive application. |
| title | Design of a PM synchronous motor for an integrated light EV motor drive application. |
| title_full | Design of a PM synchronous motor for an integrated light EV motor drive application. |
| title_fullStr | Design of a PM synchronous motor for an integrated light EV motor drive application. |
| title_full_unstemmed | Design of a PM synchronous motor for an integrated light EV motor drive application. |
| title_short | Design of a PM synchronous motor for an integrated light EV motor drive application. |
| title_sort | design of a pm synchronous motor for an integrated light ev motor drive application |
| topic | Electric vehicles Motor vehicle industry -- Technological innovations Electric motors, Synchronous Permanent magnet motors UCTD |
| url | https://scholar.sun.ac.za/handle/10019.1/131884 |
| work_keys_str_mv | AT pastellidesstavrosgeorge designofapmsynchronousmotorforanintegratedlightevmotordriveapplication |