doktorska disertacija
Peter Virtič (Author), Bojan Štumberger (Mentor), Ivan Zagradišnik (Co-mentor)

Abstract

V doktorski disertaciji je predlagan postopek načrtovanja in analize trifaznihsinhronskih strojev s trajnimi magneti in aksialnim magnetnim pretokom (SSTMAMP). Uvodoma so predstavljene posamezne izvedbe SSTMAMP z možnostmi in prednostmi njihove uporabe. Postopek v začetnih fazah načrtovanjaSSTMAMP brez feromagnetnega jedra statorja je izveden s pomočjo učinkovitega orodja, ki temelji na analitični metodi za izračun porazdelitve magnetnega polja. Uporabljena je analitična metoda za izračun porazdelitve magnetnega polja, ki temelji na izpeljavi enačb porazdelitve gostote magnetnega pretoka v eksplicitni obliki iz Maxwellovih enačb in enačbe konstitucije s pomočjo magnetnega vektorskega potenciala, zato so izhodišča izpeljav vezana na teorijo elektromagnetnega polja. V primeru SSTMAMP sta možna vsaj dva analitična pristopa načrtovanja in sicer pristop, pri katerem je SSTMAMP nadomeščen z več linearnimi sinhronskimi stroji (dvodimenzionalni pristop) in neposredni tridimenzionalni pristop, ki pa je pogosto omejen zaradi težav z reševanjem tridimenzionalne matematične formulacije problema. Vdelu je podrobno predstavljen tridimenzionalni pristop, ki zahteva prilagajanje matematične formulacije v obliko, za katero je mogoče najti matematično rešitev. Analitično izračunana porazdelitev magnetnega polja in iznje izhajajoče karakteristike SSTMAMP so preverjene z metodo končnih elementov (MKE), za dokončno potrditev analitične metode pa sta bila izdelana dva prototipa SSTMAMP različnih velikostnih razredov. Ugotovitve po izvedenih meritvah kažejo, da je analitična metoda zelo uporabna zlasti v zgodnjih fazahnačrtovanja SSTMAMP, saj je v primerjavi z MKE veliko bolj prilagodljiva in tudi hitrejša. Zaradi vpliva robov na zunanjem in notranjem radiju trajnih magnetov (TM) obravnavanega stroja je analitična metoda bolj natančna za SSTMAMP večjih premerov, kjer je ta vpliv manj izrazit. Izkaže se, da je analitična metoda zaželena pri iskanju najustreznejših karakteristik glede na zahteve tudi pri SSTMAMP manjših radijev, saj zadostuje tako za hitre informativne izračune, kot tudi za izbiro najustreznejših dimenzij posameznih delov SSTMAMP, TM in izvedbe navitja. Izvedbe SSTMAMP brez feromagnetnega jedra statorja z večjimi radiji v splošnem dosegajo pri enaki količini TM boljše karakteristike kot izvedbe z manjšimi radiji.

Keywords

načrtovanje;sinhronski stroji;trajni magneti;aksialni magnetni pretok;metoda končnih elementov;analitična metoda;

Data

Language: Slovenian
Year of publishing:
Source: Maribor
Typology: 2.08 - Doctoral Dissertation
Organization: UM FERI - Faculty of Electrical Engineering and Computer Science
Publisher: [P. Virtič]
UDC: 621.313.8:519.61/.64(043.3)
COBISS: 13386262 Link will open in a new window
Views: 2830
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Other data

Secondary language: English
Secondary title: Design and analysis of axial-flux permanent synchronous machines
Secondary abstract: This thesis proposes a design and analysis process of a three-phase axial-fluxpermanent magnet synchronous machine (AFPMSM). In the initial chapters, different types of AFPMSM are presented; the possibilities and advantages of their applications are considered. In the early design stages ofthe AFPMSM with a coreless stator, an efficient software tool based on the analytical method for the calculation of magnetic field distribution is used. Owing to the analytical method for the calculation of magnetic field distribution, which is based on the magnetic flux density distribution equation in an explicit form, derived form the constitutive and Maxwellćs equations via magnetic vector potential, some important parts of electromagnetic field theory are proposed. At least two analytical approaches for designing AFPMSMs are significant. In the first approach, the AFPMSM is replaced with several linear permanent magnet synchronous machines (two-dimensional approach). The second approach, which is three-dimensional, is often restricted due to the difficulty of solving three-dimensional formulations of mathematical problems. In this work, the three-dimensional approach adjusting mathematical problem formulation to the solvable form is presented in greater detail. Analytically calculated magnetic field distribution and consecutive characteristics of AFPMSMs are verified with the finite element method (FEM) and, finally, with two prototypes of different sizes. The findings after measurements were performed show the high applicability of the proposed analytical method, especially in the early design stages of AFPMSM. In comparison with FEM, the analytical method is faster and much more flexible. Due to the influence of the outer and inner radii, the analytical method is more accurate for AFPMSMs with higher radius, where the edge effect is less expressive. Moreover, the analytical method is applicable when searching for the most convenient characteristics of the AFPMSM with smaller outer radius, as well. The analytical method is suitable for fast informative calculations and for choosing the appropriate dimensions of the machine parts, permanent magnets (PMs) and winding design. According tothe amount of PMs, AFPMSMs with a coreless stator and a higher radius in general attain better characteristics than those with a smaller radius.
Secondary keywords: design;synchronous machine;permanent magnet;axial flux;three phase;finite element method;analytical method;
URN: URN:SI:UM:
Type (COBISS): Dissertation
Thesis comment: Univ. v Mariboru, Fak. za elektrotehniko, računalništvo in informatiko
Pages: [XXIV], 203 str.
Keywords (UDC): applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;mechanical engineering in general;nuclear technology;electrical engineering;machinery;strojništvo;electrical engineering;elektrotehnika;mathematics;natural sciences;naravoslovne vede;matematika;mathematics;matematika;computational mathematics;numerical analysis;računska matematika;numerična analiza;
ID: 986960