Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement

This research presents the proposed 4-level capacitor-clamped DC-DC boost converter (CCBC) with soft-switching implementation for high power density achievement. The proposed 4-level CCBC has an ability to reduce the size and volume of passive components and have similar characteristics with the con...

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Main Author:	Kasiran, Mohd Amirul Naim
Format:	Thesis
Language:	English English English
Published:	2019
Subjects:	TK7800-8360 Electronics
Online Access:	http://eprints.uthm.edu.my/564/1/24p%20MOHD%20AMIRUL%20NAIM%20KASIRAN.pdf http://eprints.uthm.edu.my/564/2/MOHD%20AMIRUL%20NAIM%20KASIRAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/564/3/MOHD%20AMIRUL%20NAIM%20KASIRAN%20WATERMARK.pdf
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spelling	my-uthm-ep.5642021-08-05T03:28:39Z Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement 2019-01 Kasiran, Mohd Amirul Naim TK7800-8360 Electronics This research presents the proposed 4-level capacitor-clamped DC-DC boost converter (CCBC) with soft-switching implementation for high power density achievement. The proposed 4-level CCBC has an ability to reduce the size and volume of passive components and have similar characteristics with the conventional DC-DC converter. Principally, the inductance and inductor volume are directly proportional with each other as well as the capacitance and capacitor volume. By considering high switching frequency, passive components’ volume can be reduced. Thus, the converter volume of the proposed 4-level CCBC can be reduced greatly when high switching frequency is applied. However, the switching devices suffer high semiconductor losses when hard-switching technique is used. Consequently, the cooling device volume is increased as well. Due to this problem, this study also proposes soft-switching technique in the 4-level CCBC for semiconductor loss reduction. The combination of optimum design of passive components and cooling devices may lead to the highest power density of the proposed converter. A 400 W of the 4-level CCBC converter is designed and experimentally verified. The result shows that with the inductor current ripple fixed at 1.04 A, the required inductances of the proposed 4-level CCBC and conventional boost converters are 0.11 mH and 1 mH, respectively, where the reduction of inductances is 80.75%. Consequently, the volume of inductor in the 4-level CCBC is reduced by considering the same switching frequency as the conventional DC-DC boost converter. The efficiency of the 4-level CCBC in hard-switching and soft-switching techniques for switching frequency of 500 kHz are 94.81% and 95.38%, respectively. On the other hand, by considering the Pareto-Front method, the achieved maximum power density of the proposed soft-switching technique for the 4-level CCBC is 6.51 kW/dm3 at 800 kHz switching frequency with efficiency of 97.20%. Thus, the maximum high power density and efficiency of the proposed soft-switching technique for 4-level CCBC are determined in this study. 2019-01 Thesis http://eprints.uthm.edu.my/564/ http://eprints.uthm.edu.my/564/1/24p%20MOHD%20AMIRUL%20NAIM%20KASIRAN.pdf text en public http://eprints.uthm.edu.my/564/2/MOHD%20AMIRUL%20NAIM%20KASIRAN%20COPYRIGHT%20DECLARATION.pdf text en validuser http://eprints.uthm.edu.my/564/3/MOHD%20AMIRUL%20NAIM%20KASIRAN%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Elektrik dan Elektronik
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TK7800-8360 Electronics
spellingShingle	TK7800-8360 Electronics Kasiran, Mohd Amirul Naim Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
description	This research presents the proposed 4-level capacitor-clamped DC-DC boost converter (CCBC) with soft-switching implementation for high power density achievement. The proposed 4-level CCBC has an ability to reduce the size and volume of passive components and have similar characteristics with the conventional DC-DC converter. Principally, the inductance and inductor volume are directly proportional with each other as well as the capacitance and capacitor volume. By considering high switching frequency, passive components’ volume can be reduced. Thus, the converter volume of the proposed 4-level CCBC can be reduced greatly when high switching frequency is applied. However, the switching devices suffer high semiconductor losses when hard-switching technique is used. Consequently, the cooling device volume is increased as well. Due to this problem, this study also proposes soft-switching technique in the 4-level CCBC for semiconductor loss reduction. The combination of optimum design of passive components and cooling devices may lead to the highest power density of the proposed converter. A 400 W of the 4-level CCBC converter is designed and experimentally verified. The result shows that with the inductor current ripple fixed at 1.04 A, the required inductances of the proposed 4-level CCBC and conventional boost converters are 0.11 mH and 1 mH, respectively, where the reduction of inductances is 80.75%. Consequently, the volume of inductor in the 4-level CCBC is reduced by considering the same switching frequency as the conventional DC-DC boost converter. The efficiency of the 4-level CCBC in hard-switching and soft-switching techniques for switching frequency of 500 kHz are 94.81% and 95.38%, respectively. On the other hand, by considering the Pareto-Front method, the achieved maximum power density of the proposed soft-switching technique for the 4-level CCBC is 6.51 kW/dm3 at 800 kHz switching frequency with efficiency of 97.20%. Thus, the maximum high power density and efficiency of the proposed soft-switching technique for 4-level CCBC are determined in this study.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Kasiran, Mohd Amirul Naim
author_facet	Kasiran, Mohd Amirul Naim
author_sort	Kasiran, Mohd Amirul Naim
title	Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
title_short	Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
title_full	Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
title_fullStr	Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
title_full_unstemmed	Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement
title_sort	multilevel capacitor-clamped dc-dc boost converter structure with soft-switching technique implementation for high power density achievement
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Elektrik dan Elektronik
publishDate	2019
url	http://eprints.uthm.edu.my/564/1/24p%20MOHD%20AMIRUL%20NAIM%20KASIRAN.pdf http://eprints.uthm.edu.my/564/2/MOHD%20AMIRUL%20NAIM%20KASIRAN%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/564/3/MOHD%20AMIRUL%20NAIM%20KASIRAN%20WATERMARK.pdf
_version_	1747830640008495104

Multilevel capacitor-clamped DC-DC boost converter structure with soft-switching technique implementation for high power density achievement

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