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High step-up gain LLC resonant converter for photovoltaic application

High step-up gain LLC resonant converter for photovoltaic application / Wan Mohammad Zarif Wan Kamizi
Tesis ini berkaitan dengan reka bentuk Jambatan Penuh Penukar Salunan LLC berdasarkan pengawalan UCC25600 sesuai untuk aplikasi photovoltaic. Dalam tesis, analisis terperinci, reka bentuk dan pelaksanaan LLC penukar salunan diberikan. LLC penukar salunan adalah sebahagian daripada penukar salunan, yang bermaksud operasinya tidak seperti “Pulse” skim lebar modulasi konvensional. Ia berjalan pada 50% kitar tugas dan menetapkan 180 darjah anjakan fasa dan peraturan diperolehi melalui modulasi frekuensi. Penukar ini boleh beroperasi pada Sifar Voltan Pensuisan (ZVS) menghidupkan yang bermaksud, semua MOSFET bahagian utama menghidupkan salunannya. Kelebihan penukar ini adalah kecekapan tinggi, gangguan rendah elektromagnet (EMI) dan ketumpatan kuasa yang tinggi. Penukar salunan LLC dilaksanakan dengan penuh jambatan di bahagian utama dan penuh jambatan penerus pada bahagian sekunder. Komponen magnet LLC penukar salunan adalah direka dengan menggunakan pendekatan magnet bersepadu. pengubah ini direka untuk mendapatkan kearuhan kebocoran mencukupi dan kearuhan pemagnetan untuk penukar salunan LLC. Dengan litar setara yang diperolehi oleh penghampiran harmonik pertama, dan DC ciri dalam kekerapan diperolehi. Memilih komponen seperti pengaruh salunan, kapasitor salunan dan induktor bermagnet dibincangkan dalam tesis ini. Satu kajian mod operasi penukar ini adalah dilakukan dan hasilnya disahkan melalui pengukuran makmal. Kecekapan ini dijalankan dalam dua kaedah iaitu dengan pelbagai voltan input dan diubah kekerapan penukaran. Penykar salunan LLC boleh mencapai kecekapan maksimum 93.93% pada voltan 19.8 V dan 93.99% pada pensuisan frekuensi 120 kHz. _______________________________________________________________________________________________________ This thesis deals with the design of Full-Bridge LLC Resonant Converter based on UCC25600 controller suitable for photovoltaic applications. In this thesis, detail analysis, design and implementation of a LLC resonant converter are given. The LLC resonant converter is the one of the resonant converter, which means the operation is not like conventional Pulse Width Modulation schemes. It’s running at 50% duty cycle and fixed 180-degree phase shift and regulation is achieved through frequency modulation. This converter can be operated at Zero Voltage Switching (ZVS) turn on which means, all primary side MOSFETs turn on resonantly. The advantages of this converter are high efficiency, low electromagnetic interference (EMI) and high-power density. The LLC converter is applied with full-bridge on the primary side and full-bridge rectifier on the secondary side. The magnetic component of the LLC resonant converter is designed by using an integrated magnet approach. This transformer is designed to attain the sufficient leakage inductance and magnetizing inductance for the LLC resonant converter. With the equivalent circuit derived by first harmonic approximation and DC characteristic in frequency is obtained. Selecting the component such as resonant inductor, resonant capacitor and magnetizing inductor are discussed in this thesis. A study of the mode of operation of this converter is done and the result is verified through laboratory measurement. The efficiency is conducted in two methods which is by varying the input voltage and varied the switching frequency. The LLC converter can achieve maximum efficiency of 93.93% at voltage 19.8 V and 93.99% at switching frequency 120 kHz.
Contributor(s):
Wan Mohammad Zarif Wan Kamizi - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875006315
Language:
English
Subject Keywords:
design; Full-Bridge LLC Resonant Converter; photovoltaic applications
First presented to the public:
6/1/2016
Original Publication Date:
6/6/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 128
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-06-06 16:20:15.796
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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