Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine

Due to factors such as a simpler construction and high torque density, the Permanent Magnet (PM) electric machines are favorable as an alternative to other conventional machine topologies. However, the PM machines may result high torque ripple due to the influences of cogging torque and electronic c...

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Main Author:	Zolkapli, Zulfikri Zaki
Format:	Thesis
Language:	English English
Published:	2016
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/18348/1/Influnce%20Of%20Tooth%20Designs%20On%20Electromagnetic%20Characteristics%20In%20Fractional-Slot%20Permanent%20Magnet%20Brushless%20Machine.pdf http://eprints.utem.edu.my/id/eprint/18348/2/Influence%20Of%20Tooth%20Designs%20On%20Electromagnetic%20Characteristics%20In%20Fractional-Slot%20Permanent%20Magnet%20Brushless%20Machine.pdf
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id	my-utem-ep.18348
record_format	uketd_dc
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
advisor	Mohd Jamil, Mohd Luqman
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Zolkapli, Zulfikri Zaki Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine
description	Due to factors such as a simpler construction and high torque density, the Permanent Magnet (PM) electric machines are favorable as an alternative to other conventional machine topologies. However, the PM machines may result high torque ripple due to the influences of cogging torque and electronic commutation respectively. In this research, an influence of various stator tooth designs on the electromagnetic characteristics in Fractional-Slot PM machines is investigated using 2D Finite-Element Analysis software, Ansys Maxwell. The influences of having additional thin PM on stator tooth-tip, asymmetric design of stator tooth-tip and the notch numbers and notch dimension are investigated for the purpose of torque ripple reduction at rated condition without degrading the average torque. By introducing these factors, the existing flux flows along the stator iron path would be affected leading to a potential change on the machine’s electromagnetic characteristics. The research has focused into the twelve-slot/ten-pole motor equipped with alternate tooth winding as it results more trapezoidal back-emf and lesser torque ripple. From the investigation, it is confirmed that a reduction of high torque ripple leading to a more constant torque at rated condition is desirable. It is also found that the machine which stator is modified has a significant reduction of torque ripple at about thirty-nine percent. For a verification purpose, the prototype motor design which is based on the lowest output torque ripple is developed and tested. A good agreement between predicted and measured results is achieved. The prototype design is then proposed for the application of robotic system.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Zolkapli, Zulfikri Zaki
author_facet	Zolkapli, Zulfikri Zaki
author_sort	Zolkapli, Zulfikri Zaki
title	Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine
title_short	Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine
title_full	Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine
title_fullStr	Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine
title_full_unstemmed	Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine
title_sort	influence of tooth designs on electromagnetic characteristics in fractional-slot permanent magnet brushless machine
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Electrical Engineering
publishDate	2016
url	http://eprints.utem.edu.my/id/eprint/18348/1/Influnce%20Of%20Tooth%20Designs%20On%20Electromagnetic%20Characteristics%20In%20Fractional-Slot%20Permanent%20Magnet%20Brushless%20Machine.pdf http://eprints.utem.edu.my/id/eprint/18348/2/Influence%20Of%20Tooth%20Designs%20On%20Electromagnetic%20Characteristics%20In%20Fractional-Slot%20Permanent%20Magnet%20Brushless%20Machine.pdf
_version_	1747833918987436032
spelling	my-utem-ep.183482021-10-10T15:27:31Z Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine 2016 Zolkapli, Zulfikri Zaki T Technology (General) TK Electrical engineering. Electronics Nuclear engineering Due to factors such as a simpler construction and high torque density, the Permanent Magnet (PM) electric machines are favorable as an alternative to other conventional machine topologies. However, the PM machines may result high torque ripple due to the influences of cogging torque and electronic commutation respectively. In this research, an influence of various stator tooth designs on the electromagnetic characteristics in Fractional-Slot PM machines is investigated using 2D Finite-Element Analysis software, Ansys Maxwell. The influences of having additional thin PM on stator tooth-tip, asymmetric design of stator tooth-tip and the notch numbers and notch dimension are investigated for the purpose of torque ripple reduction at rated condition without degrading the average torque. By introducing these factors, the existing flux flows along the stator iron path would be affected leading to a potential change on the machine’s electromagnetic characteristics. The research has focused into the twelve-slot/ten-pole motor equipped with alternate tooth winding as it results more trapezoidal back-emf and lesser torque ripple. From the investigation, it is confirmed that a reduction of high torque ripple leading to a more constant torque at rated condition is desirable. It is also found that the machine which stator is modified has a significant reduction of torque ripple at about thirty-nine percent. For a verification purpose, the prototype motor design which is based on the lowest output torque ripple is developed and tested. A good agreement between predicted and measured results is achieved. The prototype design is then proposed for the application of robotic system. 2016 Thesis http://eprints.utem.edu.my/id/eprint/18348/ http://eprints.utem.edu.my/id/eprint/18348/1/Influnce%20Of%20Tooth%20Designs%20On%20Electromagnetic%20Characteristics%20In%20Fractional-Slot%20Permanent%20Magnet%20Brushless%20Machine.pdf text en public http://eprints.utem.edu.my/id/eprint/18348/2/Influence%20Of%20Tooth%20Designs%20On%20Electromagnetic%20Characteristics%20In%20Fractional-Slot%20Permanent%20Magnet%20Brushless%20Machine.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=100135 mphil masters Universiti Teknikal Malaysia Melaka Faculty of Electrical Engineering Mohd Jamil, Mohd Luqman 1. ALBERTI, L., BARCARO, M. & BIANCHI, N., 2014. 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Influence Of Tooth Designs On Electromagnetic Characteristics In Fractional-Slot Permanent Magnet Brushless Machine

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