Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications

Uninterruptible power supply (UPS) is widely employed to provide reliable power in many critical applications such as computers, data centers, surgical rooms, and telecommunication equipment. UPS system essentially consists of a battery charger, battery, and inverter. Conventionally, two unidirectio...

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Main Author:	Abdullah, Muhammad Faizal
Format:	Thesis
Language:	English
Published:	2019
Subjects:	T Technology
Online Access:	http://eprints.usm.my/50743/1/Design%20And%20Development%20Of%20200%20Watts%20Bidirectional%20Cllc%20Resonant%20Converter%20For%20Uninterruptible%20Power%20Supply%20Applications.pdf
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spelling	my-usm-ep.507432021-11-23T08:23:02Z Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications 2019-05-01 Abdullah, Muhammad Faizal T Technology TK Electrical Engineering. Electronics. Nuclear Engineering Uninterruptible power supply (UPS) is widely employed to provide reliable power in many critical applications such as computers, data centers, surgical rooms, and telecommunication equipment. UPS system essentially consists of a battery charger, battery, and inverter. Conventionally, two unidirectional converters (battery charger and inverter) are often implemented separately where each of the converters will process the power in one direction. However, in certain applications, this configuration is not optimal, hence, a bidirectional converter is the solution. In UPS, a bidirectional converter configuration leads to a reduction in hardware components because battery charger and inverter can be built in one converter unit. In this dissertation, a detailed design and implementation of bidirectional CLLC resonant converter and new high efficient inverter for UPS system that provide bilateral power flow are presented. In the proposed topologies, a two-stage inverter is implemented where it consists of a front-end converter namely bidirectional CLLC resonant converter. The first topology consists of hybrid pulse width modulation (HPWM) inverter combined with the resonant converter and named as UPS 1. The second topology consists of highly efficient sine-wave inverter combined with the resonant converter and named as UPS 2. These topologies offer several advantages such as excellent soft switching performance, buck/boost operation capability, and simple switching control. The simulation and experimental results of 200 W prototypes are presented for comparison, analysis, and validation. The presented results show that the CLLC resonant converter achieves zero voltage switching (ZVS) for active switches xxi and zero current switching (ZCS) for rectifier diodes, while the inverters show good quality output waveforms with high overall efficiency. The efficiency performance shows that the proposed UPSes were able to produce high efficiency in both forward and backward modes. For UPS 1, the peak efficiency was 88.08 % in forward mode and 92.24 % in backward mode. For UPS 2, the peak efficiency was 90.71 % in forward mode and 91.82 % in backward mode. When in forward mode, the efficiency of UPS 2 was slightly higher than the efficiency of UPS 1, but in backward mode, the efficiency of UPS 1 was slightly better than the efficiency of UPS 2 2019-05 Thesis http://eprints.usm.my/50743/ http://eprints.usm.my/50743/1/Design%20And%20Development%20Of%20200%20Watts%20Bidirectional%20Cllc%20Resonant%20Converter%20For%20Uninterruptible%20Power%20Supply%20Applications.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Elektrik & Elektronik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Abdullah, Muhammad Faizal Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications
description	Uninterruptible power supply (UPS) is widely employed to provide reliable power in many critical applications such as computers, data centers, surgical rooms, and telecommunication equipment. UPS system essentially consists of a battery charger, battery, and inverter. Conventionally, two unidirectional converters (battery charger and inverter) are often implemented separately where each of the converters will process the power in one direction. However, in certain applications, this configuration is not optimal, hence, a bidirectional converter is the solution. In UPS, a bidirectional converter configuration leads to a reduction in hardware components because battery charger and inverter can be built in one converter unit. In this dissertation, a detailed design and implementation of bidirectional CLLC resonant converter and new high efficient inverter for UPS system that provide bilateral power flow are presented. In the proposed topologies, a two-stage inverter is implemented where it consists of a front-end converter namely bidirectional CLLC resonant converter. The first topology consists of hybrid pulse width modulation (HPWM) inverter combined with the resonant converter and named as UPS 1. The second topology consists of highly efficient sine-wave inverter combined with the resonant converter and named as UPS 2. These topologies offer several advantages such as excellent soft switching performance, buck/boost operation capability, and simple switching control. The simulation and experimental results of 200 W prototypes are presented for comparison, analysis, and validation. The presented results show that the CLLC resonant converter achieves zero voltage switching (ZVS) for active switches xxi and zero current switching (ZCS) for rectifier diodes, while the inverters show good quality output waveforms with high overall efficiency. The efficiency performance shows that the proposed UPSes were able to produce high efficiency in both forward and backward modes. For UPS 1, the peak efficiency was 88.08 % in forward mode and 92.24 % in backward mode. For UPS 2, the peak efficiency was 90.71 % in forward mode and 91.82 % in backward mode. When in forward mode, the efficiency of UPS 2 was slightly higher than the efficiency of UPS 1, but in backward mode, the efficiency of UPS 1 was slightly better than the efficiency of UPS 2
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Abdullah, Muhammad Faizal
author_facet	Abdullah, Muhammad Faizal
author_sort	Abdullah, Muhammad Faizal
title	Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications
title_short	Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications
title_full	Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications
title_fullStr	Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications
title_full_unstemmed	Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications
title_sort	design and development of 200 watts bidirectional cllc resonant converter for uninterruptible power supply applications
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Elektrik & Elektronik
publishDate	2019
url	http://eprints.usm.my/50743/1/Design%20And%20Development%20Of%20200%20Watts%20Bidirectional%20Cllc%20Resonant%20Converter%20For%20Uninterruptible%20Power%20Supply%20Applications.pdf
_version_	1747822045209559040

Design And Development Of 200 Watts Bidirectional Cllc Resonant Converter For Uninterruptible Power Supply Applications

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