Rancang Bangun Buck Converter Berbasis Rangkaian Analog Dan Microcontroller Atmega 328p

Restu Mukti Utomo; Hilmansyah Hilmansyah; Angga Wahyu Aditya

Restu Mukti Utomo
Hilmansyah Hilmansyah
Angga Wahyu Aditya

Keywords: DC-DC Konverter, buck converter, IGBT

Abstract

Buck converter yang merupakan bagian dari DC-DC konverter banyak di aplikasikan dalam banyak bidang seperti renewable energy untuk pengembangan dan optimasi photovoltaic / sel surya, electric vehicle, charging systems, dan teknologi lampu hemat energi atau light emitting diode (LED). Tegangan dan arus keluaran dari buck converter sangatlah dipengaruhi oleh perubahan frekuensi switching pada komponen semikonduktor yang digunakan seperti : transistor, MOSFET, dan IGBT. Sistem buck converter ini dirancang menggunakan IGBT dikarenakan arus keluaran yang diinginkan cukup besar (Io = 7A). Pembuatan dan pengembangan buck converter dapat dilakukan dalam beberapa bidang, diantaranya : rangkaian analog, microcontroller, hardware in the loop (HIL) dan FPGA in the loop (FIL). Pada paper ini, buck converter dibuat dan dikembangkan dengan menggunakan rangkaian analog dan microcontroller. Pada penelitian ini, pengujian buck converter dilakukan pada perubahan duty cycle (25%, 50% dan 75%) dan perubahan tegangan sumber (8 V, 10 V, 12 V, 14 V dan 16 V). Sedangkan parameter yang diamati adalah daya keluaran, arus keluaran, tegangan keluaran dan efisiensi. Gambar 2 menunjukkan bahwa perubahan duty cycle akan mempengaruhi pada daya keluaran. Sedangkan gambar 3 menunjukkan perubahan duty cycle akan mempengaruhi efisiensi. Berdasarkan tabel 2, tabel 3 dan tabel 4 perubahan duty cycle berbanding lurus dengan tegangan keluaran, arus keluaran, daya keluaran dan efisiensi.

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