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Development of 1 kw inverter using microcontroller / Lee Sze Sing

Development of 1 kw inverter using microcontroller_Lee Sze Sing_E3_2010_875003634_00003084328_NI
ini menunjukkan rekabentuk dan perlaksanaan fasa tunggal titi penuh penyongsang berdasarkan mikropengawal. Input voltan ialah 12V arus terus manakala output voltan ialah 240V arus ulang alik dengan frekuensi 50 Hz. Penyongsang tersebut dibahagikan kepada dua bahagian; iaitu litar pensuisan dan fasa tunggal titi penuh penyongsang. Rakabentuk litar yang lengkap telah disimulasi dengan menggunakan perisian PSIM and PROTEUS bagi memastikan rekabentuk litar tersebut dapat berfungsi dengan baik secara teori. Teknik pensuisan yang digunakan ialah Pemodulan Lebar Denyut Sinusoid (SPWM) dengan menggunakan mikropengawal PIC. Sebelum pengaturcaraan mikropengawal PIC, satu program MATLAB dijalankan untuk mengira siri lebar-lebar denyut bagi isyarat SPWM. Litar pensuisan dilaksanakan dengan menggunakan dua pemandu separuh titi berdasarkan operasi bootstrap. Operasi bootstrap membolehkan litar pensuisan mencetuskan MOSFET yang berada di bahagian atas satu titi dengan MOSFET yang berada di bahagian bawah titi yang lain secara serentak. Rakabentuk litar dilaksanakan di atas papan reka secara sementara dan seterusnya dialihkan ke papan litar tercetak (PCB) bagi perlaksanaan secara kekal. Voltan output daripada titi penuh penyongsang dalam bentuk isyarat SPWM dinaikkan kepada 240V punca min kuasa dua (pmkd) dengan menggunakan pengubah injap naik dan seterusnya dituras menggunakan turas laluan rendah jenis LC bagi mendapatkan voltan output sinusoid. Bagi perintang 400Ω, THD bagi isyarat voltan ialah 3.8% manakala THD bagi isyarat arus ialah 3.2%. Pengukuran output telah dilaksanakan dan dibandingkan dengan output simulasi bagi menentukan prestasi fasa tunggal titi penuh penyongsang berdasarkan mikropengawal. _________________________________________________________________________________________ This thesis shows the design and implementation of microcontroller-based single phase full bridge inverter. The input voltage is 12VDC while the output is 240VAC with frequency of 50Hz. The inverter has been divided into two parts; switching circuit and single phase full bridge inverter. The complete circuit design is simulated using PSIM and PROTEUS software to make sure the design is theoretically achieved high performance. The switching technique used is SPWM switching technique incorporating PIC microcontroller. The PIC microcontroller is programmed to directly generate SPWM switching signals for the inverter. Prior to the PIC programming, a MATLAB program is run to calculate the SPWM switching angles. The switching circuit is implemented by using two half bridge MOSFET drivers incorporating bootstrap operation. Bootstrap operation enable switching circuit to trigger the high side and low side MOSFETs simultaneously by sending the SPWM switching signal to the MOSFETs. Designed circuit is assembled temporary on breadboard then shifted to printed circuit board for permanent assembly. It is tested with resistive load for output verification. The SPWM output voltage from full bridge inverter is stepped up by using a transformer to 240Vrms and filtered with a LC low pass filter to achieve sinusoidal waveform. The THD output voltage is 3.8% while output current is 3.2% for a resistive load of 400Ω. Measured output is compared with the simulated output to determine the performance of designed microcontroller-based single phase full bridge
Contributor(s):
Lee Sze Sing - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875003634
Language:
English
Subject Keywords:
bridge inverter; Bootstrap; switching technique
First presented to the public:
4/1/2010
Original Publication Date:
8/2/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages -
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-08-02 12:30:10.113
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Nor Hayati Ismail

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Development of 1 kw inverter using microcontroller / Lee Sze Sing1 2018-08-02 12:30:10.113