THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter

Low harmonic waveform is a very important requirement of the high power applications. Nowadays many researchers are focusing on new voltage source. Such voltage sources are formed by Cascade H-bridge Multilevel Inverter with low Total Harmonic Distortion (THD). A multilevel inverter has wide appl...

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Main Author:	Alhalali, Safoan M. O.
Format:	Thesis
Language:	English English
Published:	2006
Subjects:	Speed Variable speed drives
Online Access:	http://psasir.upm.edu.my/id/eprint/6153/1/FK_2006_67.pdf
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id	my-upm-ir.6153
record_format	uketd_dc
spelling	my-upm-ir.61532023-10-11T08:54:36Z THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter 2006-07 Alhalali, Safoan M. O. Low harmonic waveform is a very important requirement of the high power applications. Nowadays many researchers are focusing on new voltage source. Such voltage sources are formed by Cascade H-bridge Multilevel Inverter with low Total Harmonic Distortion (THD). A multilevel inverter has wide applications especially for High-Power Electrical Vehicle motor drive because they convert small DC voltage to high AC voltage. This study investigates the performance and discusses the features of transformer and transformer-less multilevel inverters. In order to generate sinusoidal wave with minimum total harmonic distortion, one approach has been adapted to calculate the conducting angles. Simple external circuit was employed to equalize the magnetic flux via each transformer which makes it more efficient in order of the manufacturability. All H-bridge will have the same specifications which enhance the modularity of the system. THD values have been measured experimentally and from simulation results, the results show a good agreement with latest research. The experimental result has been compared with the simulation values, considerable difference have been notice because the effect of some factor such as the difference in components quality and the precise of the microcontroller. The PIC microcontroller was used to generate the gate signals and controlling the swapping circuit. The proposed circuits were simulated using Orcad/Pspice and experimental prototype was build as a drive for single phase induction motor based voltage 1 frequency method to show the validity of this system. Simulation of the diode clamped and transformer-less cascade multilevel inverter has been carried out to investigate their features. Speed Variable speed drives 2006-07 Thesis http://psasir.upm.edu.my/id/eprint/6153/ http://psasir.upm.edu.my/id/eprint/6153/1/FK_2006_67.pdf text en public masters Universiti Putra Malaysia Speed Variable speed drives Engineering Mahmod, Senan English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Mahmod, Senan
topic	Speed Variable speed drives
spellingShingle	Speed Variable speed drives Alhalali, Safoan M. O. THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter
description	Low harmonic waveform is a very important requirement of the high power applications. Nowadays many researchers are focusing on new voltage source. Such voltage sources are formed by Cascade H-bridge Multilevel Inverter with low Total Harmonic Distortion (THD). A multilevel inverter has wide applications especially for High-Power Electrical Vehicle motor drive because they convert small DC voltage to high AC voltage. This study investigates the performance and discusses the features of transformer and transformer-less multilevel inverters. In order to generate sinusoidal wave with minimum total harmonic distortion, one approach has been adapted to calculate the conducting angles. Simple external circuit was employed to equalize the magnetic flux via each transformer which makes it more efficient in order of the manufacturability. All H-bridge will have the same specifications which enhance the modularity of the system. THD values have been measured experimentally and from simulation results, the results show a good agreement with latest research. The experimental result has been compared with the simulation values, considerable difference have been notice because the effect of some factor such as the difference in components quality and the precise of the microcontroller. The PIC microcontroller was used to generate the gate signals and controlling the swapping circuit. The proposed circuits were simulated using Orcad/Pspice and experimental prototype was build as a drive for single phase induction motor based voltage 1 frequency method to show the validity of this system. Simulation of the diode clamped and transformer-less cascade multilevel inverter has been carried out to investigate their features.
format	Thesis
qualification_level	Master's degree
author	Alhalali, Safoan M. O.
author_facet	Alhalali, Safoan M. O.
author_sort	Alhalali, Safoan M. O.
title	THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter
title_short	THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter
title_full	THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter
title_fullStr	THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter
title_full_unstemmed	THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter
title_sort	thd improvement for variable speed drive using single phase multilevel inverter
granting_institution	Universiti Putra Malaysia
granting_department	Engineering
publishDate	2006
url	http://psasir.upm.edu.my/id/eprint/6153/1/FK_2006_67.pdf
_version_	1783725691652538368

THD Improvement for Variable Speed Drive Using Single Phase Multilevel Inverter

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