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Low-cost acdc converter for electrical portable device

Low-cost acdc converter for electrical portable device / Nur Al-Amin Amran
Projek ini membentangkan reka bentuk AC / DC penukar kos rendah yang akan menghasilkan voltan keluaran 12-24V DC berterusan. Voltan keluaran tetap ini boleh digunakan untuk aplikasi voltan rendah. Objektif reka bentuk ini adalah kesederhanaan, kecekapan, kestabilan dan saiz padat. Berdasarkan objektif ini, topologi penukar SS dipilih untuk dirancang kerana ia menarik perhatian kerana keberkesanan kosnya kerana ketiadaan pengubah termasuk kekurangan tenaga, kecekapan tinggi dan faktor kuasa yang baik. Dalam projek ini, penukar buck digunakan sebagai sel PFC dan penukar buck-boost digunakan sebagai sel DC-DC. Ini dicadangkan buck bersepadu dan buck-boost converter yang dapat menghasilkan voltan bas intermediate kurang dan dengan merancang pengawal PI voltan dapat disimpan pada nilai malar untuk berbagai nilai keluaran. Teknik kawalan switching yang dicadangkan oleh rangsangan AC-DC yang dicadangkan dipermudahkan bagi suis untuk memandu. Voltan output penukar juga dikawal oleh pengawal PI. Akibatnya, penukar yang dicadangkan dikendalikan dengan kecekapan yang tinggi untuk aplikasi voltan rendah. Untuk mengesahkan kaedah reka bentuk ini, rangsangan buck buck diuji dalam peringkat simulasi dengan menggunakan MATLAB Simulink digunakan untuk menjana hasil. Dari simulasi, Apabila kuasa output dan voltan output berada pada 150 W dan 19 Vdc, PF, ƞ, THDi dan Vbus adalah 0.951, 89.7%, 85.1% dan 111.4 Vdc, bahawa fasa tunggal yang dicadangkan Penukar AC / DC mempunyai kecekapan lebih daripada 80% dan di atas faktor kuasa 0.95. _______________________________________________________________________________________________________ This project presents about the design of the low-cost AC/DC converter which will produce constant 12-24V DC output voltage. This constant output voltage can be used for low voltage application. The objectives for this design are simplicity, efficiency, stability and compact size. Based on these objectives, the SS converter topology is chosen to be designed as it draws much attention because of its cost effectiveness as the absence of transformer includes the less power losses, high efficiency and good power factor. In this project, a buck converter is used as PFC cell and buck-boost converter is used as DC-DC cell. This proposed integrated buck and buck-boost converter able to produce less intermediate bus voltage and by designing the PI controller the voltage can be kept at constant value for the various output values. The switching control technique of the proposed buck-boost AC-DC converter is simplified for the switches to drive. The output voltage of the converter is also regulated by PI controller. As a result, the proposed converter is operated with high efficiency for the low voltage application. In order to verify this design methodology, the buck buck-boost is tested in simulation stage by using MATLAB Simulink is used to generate results. From the simulations, When the output power and output voltage is at 150 W and 19 Vdc, the PF, ƞ, THDi and Vbus is 0.951, 89.7%, 85.1%, and 111.4 Vdc, where it was observed that the proposed single-phase AC/DC converter has more than 80% efficiency and above 0.95 power factor.
Contributor(s):
Nur Al-Amin Amran - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875008649
Language:
English
Subject Keywords:
low-cost; AC/DC; 12-24V
First presented to the public:
5/1/2019
Original Publication Date:
3/9/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 76
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-03-09 15:57:21.468
Date Last Updated
2020-12-10 16:29:35.375
Submitter:
Mohd Jasnizam Mohd Salleh

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