Analysis and Design of Axial Flux Permanent Magnet Wind Generator System for Direct Battery Charging Applications

- by Francois Gerhardus Rossouw Thesis presented in partial fullment of the requirements for the degree of Master of Science in Engineeri...

- by Francois Gerhardus Rossouw

Thesis presented in partial fullment of the requirements for the degree of Master of Science in Engineering at the University of Stellenbosch

Department of Electrical & Electronic Engineering
Stellenbosch University
Private Bag X1, Matieland, 7602, South Africa

Supervisor: Prof M.J. Kamper

Permanent Magnet Wind Generator System

By submitting this thesis electronically, I declare that the entirety of the work con- tained therein is my own, original work, that I am the owner of the copyright thereof (unless to the extent explicitly otherwise stated) and that I have not previously in its entirety or in part submitted it for obtaining any qualication.

Analysis and Design of Axial Flux Permanent Magnet Wind Generator System for Direct Battery Charging Applications


In this study the focus is on the implementation of a coreless axial ux perma-nent 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 rectier-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 dif-ferent winding topologies for this type of machine are evaluated. This evaluation is based on a theoretical analysis and conrmed by nite element analysis and practical measurements. It is shown that an AFPM machine equipped with non-overlapping 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 veried with a SimplorerTM simulation package and practical measurements. The calculations from theoreti-cally derived equations are in good agreement with nite element and measured results.

Download: Analysis and Design of Axial Flux Permanent Magnet Wind Generator System for Direct Battery Charging Applications

Analise en Ontwerp van 'n Aksiaalvloed Permanente Magneet Wind Generator Sisteem in Battery Laai Toepassings

In hierdie studie word gefokus op die analiese en ontwerp van 'n aksiaalvloed permanente magneet generator vir gebruik in windgenerator toepassings. Die prob-leme met direk gekoppelde batterylaaier toepassings soos maksimum drywingspunt passing en akoestiese lawaai, word ook bespreek.

Die aksiaalvloed permanente magneet generator word teoreties geanaliseer en verskillende tipe wikkelings topologieƫ word geƫvalueer. Die evalusie is bevestig deur eindige element analiese, asook praktiese metings. Daar word bewys dat ak-siaalvloed permanente magneet masjiene met nie-oorkruisende wikkelings dieselfde eektiwiteit kan gee as normale oorkruisende wikkelings, terwyl minder koper ge-
bruik word.

'n Metode word bereken waarvolgens beter maksimum drywingspunt passing en amper-sinusvormige strome verkry word in aksiaalvloed permanente magneet generators in windgenerator toepassings. Die werksverrigting van die windgenerator word geverieer met gebruik van SimplorerTM simulasie sagteware, asook praktiese metings.

Learn more: Nikola Tesla: Atmospheric electricity - Wireless Power Transmission

Special Note: Posting of this document on Blog does not imply approval or disapproval by the Department of Energy. This work is made available to illustrate innovative energy research by multiple researchers involving new concepts. Scientific method requires replication and independent test and verification, and an additional research prototype build-up for those purposes is presently underway by the authors.

 Revealed At Last: Ancient Invention Generates Energy-On-Demand

✔ Nikola Tesla’s method of magnifying electric power by neutralizing the magnetic counter-forces in an electric generator

Generates Energy-On-DemandEasy Power Plan Will Change Our World Forever

✔ Currents are 180 out of phase with each other, Lenz's law naturally is broken
✔ Principle of Resonance to achieve Overunity

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