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Elektronik kuasa dalam aplikasi pengecasan kapasitor / Nik Izudin Nik Ramli

Elektronik kuasa dalam aplikasi pengecasan kapasitor_Nik Izudin Bin Nik Ramli_ E3_2005_NI
Projek ini bertujuan untuk merekabentuk satu litar elektronik kuasa yang diguna dalam aplikasi pengecasan kapasitor. Litar ini ialah Penukar Resonan Beban Sesiri Tetimbang Separuh. Fungsi litar ini ialah untuk membekalkan kuasa arus terus (dc) resonan (resonant power supplies). Litar ini dapat berfungsi seperti transformer di mana ia dapat menurunkan voltan masukan dc sehingga julat voltan keluaran lebih kecil dari separuh voltan masukan. Masukan voltan yang di beri ialah 30V. Analisis telah dijalankan dengan menggunakan perisian PSIM bagi menguji litar rekabentuk yang telah dibuat. Daripada simulasi PSIM dapat di ketahui bahawa voltan keluaran yang di hasilkan bergantung kepada frekuensi resonan dan frekuensi pensuisan yang dikenakan. Perubahan frekuensi pensuisan yang di lakukan akan mempengaruhi mod operasi litar. Terdapat 2 mod operasi litar iaitu mod tak berterusan dan mod berterusan. Mod tak berterusan berlaku apabila frekuensi pensuisan lebih kecil daripada separuh frekuensi resonan. Manakala mod berterusan pula berlaku apabila frekuensi pensuisan lebih besar daripada separuh frekuensi resonan. Daripada simulasi litar, pada mod tak berterusan di dapati voltan keluaran yang di hasilkan ialah 5V manakala pada mod berterusan voltan keluarannya ialah 12V. Semakin tinggi frekuensi pensuisan di kenakan, semakin tinggi voltan keluaran yang di hasilkan tetapi hanya terhad sehingga separuh voltan masukan sahaja. Rekabentuk litar pensuisan pula menggunakan teknik PWM bagi mengawal isyarat kawalan suis MOSFET. _________________________________________________________________________________________ This project is to design a power electronics circuit that can be used in capacitor charging applications. The circuit is called a Half Bridge Series Loaded Resonance Converter. The function of this circuit is to supply resonance dc power. This circuit is act like a transformer which can step down an input dc voltage until the output voltage is less than half of the input voltage. For this project, the circuit using an input voltage of 30V. Analysis have been done using PSIM software. From PSIM simulation, we know that the output voltage produced depends on resonant frequency and switching frequency. Circuit operation mode will be effected if there is some changes in switching frequency. There are two modes of circuit operations which are continuous and discontinuous mode. Discontinuous mode occured when switching frequency is less than half of resonance frequency and continuous mode occured when switching frequency is more than half of resonance frequency. From the simulation of discontinuous mode, it shows that the output voltage is 5V. While for the continuous mode the output voltage is 12V. We have already know that when switching frequency is high, the output voltage produced is also high but it is limited until half of the input voltage. The designed switching circuit is using a PWM technique to control the MOSFET.
Contributor(s):
Nik Izudin Nik Ramli - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
power electronics circuit; Half Bridge Series Loaded Resonance Converter; transformer
First presented to the public:
3/1/2005
Original Publication Date:
8/13/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 61
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-08-13 10:49:04.262
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Nor Hayati Ismail

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Elektronik kuasa dalam aplikasi pengecasan kapasitor / Nik Izudin Nik Ramli1 2018-08-13 10:49:04.262