Pages 6-12 missing. / Thesis (MScEng)--University of Stellenbosch, 2005. / ENGLISH ABSTRACT: The transverse flux machine (TFM) offers the opportunity of high torque to volume ratios which makes
it an excellent candidate for direct wheel drives and low speed generator applications. TFMs have a
three dimensional flux path which eliminates iron laminates as a viable core material. Soft magnetic
composites have been adopted in these machines due to their isotropic nature. There are three main
variants of TFMs, namely, active rotor (with magnets on the rotor), passive rotor (with magnets on the
stator), and reluctance (with no magnets). As a relatively recent development in electrical machines, the
TFM still has many hurdles facing its adoption in industry. Some of these hurdles are high cogging torque,
a difficult construction, and expensive materials.
This thesis focuses on the design of a three phase 50 kW passive rotor machine. Finite element
simulation is used to determine the optimal configuration, and the final machine is analysed in detail. The
construction process and associated problems are also detailed. The completed machine did not perform
to the desired specification, but much knowledge was gleaned about the TFM, the construction caveats,
and future potential directions. / AFRIKAANSE OPSOMMING: Die transversale-vloed masjien (TFM) met sy hoe draaimoment tot volume verhouding, is 'n uitstekende
kandidaat vir direkte wiel aandrywing en lae spoed generator toepassings. Die vioed pad van die masjiene
is drie-dimensioneel, wat yster laminasies as kern materiaal elimineer. "Soft magnetic composites" kan
gebruik word vir hierdie masjiene as gevolg van hulle isotropiese eienskappe. Daar bestaan drie hoof
variante van die TFM, naamlik, die aktiewe rotor (met magnete op die rotor), passiewe rotor (met magnete
op to stator), en reluktansie (sonder magnete). Die TFM is 'n redelike nuwe tipe masjien en daar is nog
probleme wat opgelos moet word voordat die industrie sal begin om dit te gebruik. Van hierdie probleme
is "cogging" draaimoment, 'n moeilike konstruksie en duur materiale.
Die fokus van hierie tesis is op die ontwerp van 'n 50 kW drie-fase passiewe rotor masjien. Eindige
element simulasie is gebruik om die optimale konfigurasie te kry, en 'n analise is gedoen op die finale
masjien. Die konstruksie proses en die probleme wat daarmeer saam gaan is ook beskryf. Die prototipe
masjien wat gebou is het nie aan sy oorspronklike spesifikasie voldoen nie, maar baie kennis is opgedoen
oor die TFM, die konstruksie proses, en potensiele toekomende toepassings.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/50313 |
| Date | 04 1900 |
| Creators | Drennan, Duncan Scott |
| Contributors | Kamper, M. J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | 111 p. : ill. |
| Rights | Stellenbosch University |
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