Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2009. / In this study the focus is on the implementation of a coreless axial ux permanent
magnet (AFPM) generator for use in a wind generator application with direct
battery charging. The wind generator power system is analysed and discussed.
The common concerns with AFPM wind generators in recti er-fed direct battery
charging applications, such as maximum power point matching and acoustic noise
emission, are discussed.
In this study the AFPM wind generator is theoretically analysed and the different
winding topologies for this type of machine are evaluated. This evaluation
is based on a theoretical analysis and con rmed by nite element analysis and
practical measurements. It is shown that an AFPM machine equipped with nonoverlapping
windings can give a similar performance to that of normal overlapping
windings, while using less copper.
It is shown in this thesis that the coreless AFPM generator has a relatively low
internal phase synchronous inductance resulting in severe problems with regard to
maximum power matching and noise. A method is proposed and in detail analysed
in this thesis whereby better power point matching is achieved and near-sinusoidal
current is obtained using AFPM generators in direct battery charging wind energy
systems. The wind generator system's performance is verified with a SimplorerTM
simulation package and practical measurements. The calculations from theoretically
derived equations are in good agreement with finite element and measured
results.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/2726 |
| Date | 03 1900 |
| Creators | Rossouw, Francois Gerhardus |
| Contributors | Kamper, M. J., University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Stellenbosch |
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