Sinusoidal Pulse Width Modulation Berbasis Lookup Table untuk Inverter Satu Fase Menggunakan 16-Bit Digital Signal Controller

Yohan Fajar Sidik, Danang Wijaya, Eka Firmansyah

Abstract


Abstract—Inverter as one equipment relates closely to the renewable energy sector gain more and more important role in utilizing renewable energy widely. The inverter converts dc to ac form by a specific switching strategy. In this research, the switching strategy employed unipolar sinusoidal pulse width modulation (SPWM). The switching schemes were obtained by synthesis from sine lookup table that the width of pulses were obtained from simulation of PSIM. The aim of this research is to create a switching scheme in a software and then implemented in 16-bit digital signal controller (DSC). Experiment in lab scale has been done to verify the proposed unipolar SPWM. The results showed that SPWM signals were easier generated in 16-bit digital signal controller (DSC). Other that, feature of PWM in this DSC has been supporting in inserting dead-time to avoid shoot through current at IGBT.

Keywords—renewable energy, inverter, SPWM, PSIM, 16-bit digital signal controller

Intisari—Inverter memiliki peranan penting dalam pemanfaatan energi terbarukan secara luas. Inverter ini mengkonversi tegangan dc menjadi ac dengan metode penyaklaran tertentu. Pada penelitian ini metode penyaklaran yang dipilih adalah unipolar sinusoidal pulse width modulation (SPWM). Pola-pola penyaklarannya merupakan sintesis dari sebuah tabel sinus yang lebar pulsanya diperoleh melalui simulasi PSIM. Tujuan penelitian ini adalah untuk membuat pola penyaklaran dalam perangkat lunak kemudian diimplementasikan dalam 16-bit digital signal controller (DSC). Ekperimen dalam skala lab telah dilakukan untuk memverifikasi teknik penyaklaran unipolar SPWM yang diusulkan. Hasil penelitian menunjukkan bahwa sinyal SPWM dengan mudah dapat dibangkitkan oleh 16-bit digital signal controller (DSC). Selain itu, fitur PWM pada DSC ini telah mendukung penyisipan dead time untuk menghindari arus shoot through pada IGBT.

Kata Kunci—energi terbarukan, inverter, SPWM, PSIM, 16-bit digital signal controller


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References


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DOI: http://dx.doi.org/10.22146/jnteti.v2i2.55

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