Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes

Permanent Magnet Synchronous Motor (PMSM) drives with a high degree of fault tolerance are required where it is crucial to guarantee continuous operation of the drive system. To have additional benefits during a fault, PMSM drives with open-ended winding can be employed. Both ends of the windings in...

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Main Author:	Abu Shah, Ismail
Format:	Thesis
Language:	English English
Published:	2017
Subjects:	T Technology (General)
Online Access:	http://eprints.utem.edu.my/id/eprint/21896/1/Damage%20Mechanics%20Based%20Approach%20In%20Failure%20Prediction%20Of%20Draw%20Forming%20Processes%20-%20Ismail%20Abu%20Shah%20-%2024%20pages.pdf http://eprints.utem.edu.my/id/eprint/21896/2/Damage%20Mechanics%20Based%20Approach%20In%20Failure%20Prediction%20Of%20Draw%20Forming%20Processes.pdf
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spelling	my-utem-ep.218962023-01-13T14:58:53Z Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes 2017 Abu Shah, Ismail T Technology (General) TA Engineering (General). Civil engineering (General) Permanent Magnet Synchronous Motor (PMSM) drives with a high degree of fault tolerance are required where it is crucial to guarantee continuous operation of the drive system. To have additional benefits during a fault, PMSM drives with open-ended winding can be employed. Both ends of the windings in the prototype PMSM are connected to a dual inverter arrangement of two 2-level inverters both connected to one dc source. However, considering the zero sequence voltage is clamped to zero because of the return path between the two inverters, zero sequence current circulates in the machine windings which increases losses and generates heat. Furthermore, most PMSMs generate harmonics in the back electromotive force. These harmonics if not compensated for will couple with the circulating zero sequence current, increasing the machine current further and typically beyond ratings, the total harmonic distortion of the current will increase, and the generated torque oscillates more than twice the average torque. To accurately control the current during normal operating conditions, the flux linkage harmonics are measured and incorporated with the dq0-axis current control scheme to restrict the harmonic current in the system. A revised simulation model for the PMSM drives was constructed that considers the zero sequence model and integrate the effects of nonsinusoidal back EMFs within the drive. The model can be easily extended to higher harmonic based on the obtained harmonics of the PMSM drives. Open-phase faults are then considered in this thesis. Semiconductor switches in a phase leg can be turned off and the phase winding disconnected so that the system effectively operates under two-phase vector control. A simple modified transformation under fault conditions is proposed that enables the current to be regulated in the dq-axis and retains control of the voltage. The different outcomes of utilizing a system that maintains 1200 between phase currents and a phase shift of 600 between the remaining healthy phases are investigated. Under such conditions, possible switching states that can be used are considered. The results demonstrate that the proposed modified coordinate transformation is easy to implement and effective in solving the loss of one phase when open-phase fault occurs in the setup. The performance evaluation based on the experimental measurements are investigated during normal and faulted operating conditions. 2017 Thesis http://eprints.utem.edu.my/id/eprint/21896/ http://eprints.utem.edu.my/id/eprint/21896/1/Damage%20Mechanics%20Based%20Approach%20In%20Failure%20Prediction%20Of%20Draw%20Forming%20Processes%20-%20Ismail%20Abu%20Shah%20-%2024%20pages.pdf text en public http://eprints.utem.edu.my/id/eprint/21896/2/Damage%20Mechanics%20Based%20Approach%20In%20Failure%20Prediction%20Of%20Draw%20Forming%20Processes.pdf text en validuser https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=104924 phd doctoral Universiti Teknikal Malaysia Melaka Faculty of Mechanical Engineering
institution	Universiti Teknikal Malaysia Melaka
collection	UTeM Repository
language	English English
topic	T Technology (General) T Technology (General)
spellingShingle	T Technology (General) T Technology (General) Abu Shah, Ismail Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes
description	Permanent Magnet Synchronous Motor (PMSM) drives with a high degree of fault tolerance are required where it is crucial to guarantee continuous operation of the drive system. To have additional benefits during a fault, PMSM drives with open-ended winding can be employed. Both ends of the windings in the prototype PMSM are connected to a dual inverter arrangement of two 2-level inverters both connected to one dc source. However, considering the zero sequence voltage is clamped to zero because of the return path between the two inverters, zero sequence current circulates in the machine windings which increases losses and generates heat. Furthermore, most PMSMs generate harmonics in the back electromotive force. These harmonics if not compensated for will couple with the circulating zero sequence current, increasing the machine current further and typically beyond ratings, the total harmonic distortion of the current will increase, and the generated torque oscillates more than twice the average torque. To accurately control the current during normal operating conditions, the flux linkage harmonics are measured and incorporated with the dq0-axis current control scheme to restrict the harmonic current in the system. A revised simulation model for the PMSM drives was constructed that considers the zero sequence model and integrate the effects of nonsinusoidal back EMFs within the drive. The model can be easily extended to higher harmonic based on the obtained harmonics of the PMSM drives. Open-phase faults are then considered in this thesis. Semiconductor switches in a phase leg can be turned off and the phase winding disconnected so that the system effectively operates under two-phase vector control. A simple modified transformation under fault conditions is proposed that enables the current to be regulated in the dq-axis and retains control of the voltage. The different outcomes of utilizing a system that maintains 1200 between phase currents and a phase shift of 600 between the remaining healthy phases are investigated. Under such conditions, possible switching states that can be used are considered. The results demonstrate that the proposed modified coordinate transformation is easy to implement and effective in solving the loss of one phase when open-phase fault occurs in the setup. The performance evaluation based on the experimental measurements are investigated during normal and faulted operating conditions.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Abu Shah, Ismail
author_facet	Abu Shah, Ismail
author_sort	Abu Shah, Ismail
title	Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes
title_short	Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes
title_full	Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes
title_fullStr	Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes
title_full_unstemmed	Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes
title_sort	damage mechanics based approach in failure prediction of draw forming processes
granting_institution	Universiti Teknikal Malaysia Melaka
granting_department	Faculty of Mechanical Engineering
publishDate	2017
url	http://eprints.utem.edu.my/id/eprint/21896/1/Damage%20Mechanics%20Based%20Approach%20In%20Failure%20Prediction%20Of%20Draw%20Forming%20Processes%20-%20Ismail%20Abu%20Shah%20-%2024%20pages.pdf http://eprints.utem.edu.my/id/eprint/21896/2/Damage%20Mechanics%20Based%20Approach%20In%20Failure%20Prediction%20Of%20Draw%20Forming%20Processes.pdf
_version_	1776103115680907264

Damage Mechanics Based Approach In Failure Prediction Of Draw Forming Processes

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