(For USM Staff/Student Only)

EngLib USM > Ω School of Electrical & Electronic Engineering >

Design and implementation of a multilevel inverter fed low voltage isolated Dc-Dc converter

Design and implementation of a multilevel inverter fed low voltage isolated Dc-Dc converter / Chan Su Yan
Penukar DC-DC berkembang dengan pesat sebagai salah satu penyelesaian untuk pelbagai aplikasi. Penukar DC-DC asas seperti penukar jenis buck, jenis boost dan jenis buck-boost adalah ringkas, namun voltan keluaran dari penukar jenis tersebut tidak diasingkan secara elektrik dari voltan masukan. Oleh itu, penukar terpencil DC-DC telah direkabentuk. Pengubah dibina di antara Penukar Arus Terus ke Arus Ulang-alik (DC-AC) dan Penukar Arus Ulang-alik ke Arus Terus (AC-DC) untuk mengasingkan kuasa elektrik masukan dari kuasa keluaran. Penukar jambatan-penuh ialah penukar terpencil yang beroperasi pada Pensuisan Voltan Sifar (ZVS) dan menghasilkan output DC terpencil. Namun, tekanan komponen suis kuasa adalah sama dengan voltan masukan dalam penukar jambatan-penuh. Apabila voltan masukan meningkat, peningkatan maksimum voltan suis kuasa akan menambahkan kos pengeluaran. Akibatnya, topologi pelbagai aras dicadangkan dalam teknologi penyongsang untuk mengatasi cabaran ini. Dalam penyongsang kapasitor terbang pelbagai aras, voltan merentasi suis kuasa dikurangkan kepada setengah daripada voltan input. Tesis ini mencadangkan dan mengimplementasikan penukar terpencil DC-DC voltan rendah yang berdasarkan penyongsang kapasitor terbang tiga aras di papan litar bercetak. Prinsip operasi litar dan keputusan eksperimen penukar ini dibentangkan. Hasil kajian menunjukkan bahawa prototaip beroperasi pada ZVS dan voltan maksimum merentasi suis kuasa adalah hanya separuh daripada voltan masukan. _______________________________________________________________________________________________________ DC-DC converter is growing rapidly to become one of the significant solutions for a wide range of applications. Fundamental DC-DC converters such as buck converter, boost converter and buck-boost converter are simple but the output voltage of these converters is not isolated electrically. Therefore, isolated DC-DC converter is designed. Both the DC-AC and AC-DC converter are implemented together with the presence of transformer to provide electrical isolation between input and output power. Full bridge converter is one of the isolated converters which can operate at ZVS and produce isolated DC output. However, the component stress of power switches in full bridge converter is equals to the input voltage. When input voltage is increased, it results in higher voltage rating of power switches which increases the production cost. Consequently, multilevel topologies are proposed in inverter technology to overcome this challenge. In flying capacitor multilevel inverter, the voltage across the power switches is reduced to half of input voltage. This thesis proposes and implements a three-level flying capacitor inverter based isolated low voltage DC-DC converter on printed circuit board. The operating principle of circuit and experimental result of this converter are presented. The results show that the prototype is operating with ZVS and the maximum voltage across power switches is only half of input voltage.
Contributor(s):
Chan Su Yan - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875004729
Language:
English
Subject Keywords:
DC-DC; converter; isolation
First presented to the public:
6/1/2012
Original Publication Date:
7/2/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 105
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-07-02 16:11:48.497
Submitter:
Mohd Jasnizam Mohd Salleh

All Versions

Thumbnail Name Version Created Date
Design and implementation of a multilevel inverter fed low voltage isolated Dc-Dc converter1 2020-07-02 16:11:48.497