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All Journal KACANEGARA Jurnal Pengabdian pada Masyarakat Jurnal Teknik Elektro
Herlambang Setiadi
Universitas Telkom
Education Electrical & Electronics Engineering

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A Two-Stage High-Gain Quadratic Boost Converter Using Inverse-Coupled-Inductors for Low Input-Current Ripple Alwy Muhammad Ravi; Herlambang Setiadi; Muhammad Zakiyullah Romdlony
Jurnal Teknik Elektro Vol. 18 No. 1 (2026)
Publisher : LPPM Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jte.v18i1.48133

Abstract

High step-up DC–DC converters are required to interface low-voltage renewable energy sources with higher-voltage dc buses in dc microgrid applications. This paper presents a simulation-based two-stage high-gain DC–DC converter integrating an inverse-coupled-inductor front end with a quadratic boost rear stage. The inverse-coupled front end is employed to reduce source-side input-current ripple and mitigate dc-flux accumulation, thereby lowering the risk of magnetic-core saturation in the front-stage inductors under high-power operation. Compared with uncoupled and direct-coupled configurations, the inverse-coupled arrangement enables ripple-current cancellation between the two input phases, which improves its feasibility for higher-power implementation. The quadratic boost rear stage provides high voltage gain and supports a more stable dc-bus voltage response. Analytical derivations of the operating principle, voltage gain, and input-current ripple ratio are presented, followed by comparative simulation of the three inductor configurations. The results show that the inverse-coupled configuration achieves the lowest average input-current ripple ratio of , with a minimum value of  at  = 0,5. The converter also produces an output voltage close to 400 V from a 20 V input, corresponding to a voltage gain of approximately 20. These results indicate that the proposed topology offers a promising trade-off between high voltage gain, reduced front-stage magnetic stress, source-side ripple suppression, and output-voltage stability for renewable-energy-fed dc-bus applications.
Sistem pemantauan nutrisi padi semai kering berbasis Internet of Things M Rivaldi Ali Septian; Herlambang Setiadi; Arif Abdul Aziz
KACANEGARA Jurnal Pengabdian pada Masyarakat Vol 9, No 1 (2026): February
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/kacanegara.v9i1.3134

Abstract

Pertanian padi merupakan sektor penting dalam ketahanan pangan di Indonesia. Salah satu tahap krusial dalam budidaya padi adalah persemaian, yang menentukan kualitas bibit sebelum dipindahkan ke lahan utama. Metode semai kering mulai diterapkan karena lebih efisien dalam penggunaan air dan mempermudah proses transplantasi. Namun, metode ini memerlukan pemantauan nutrisi yang lebih akurat karena bibit tidak tergenang air seperti metode konvensional, sehingga rentan terhadap ketidakseimbangan unsur hara. Kegiatan pengabdian masyarakat ini bertujuan untuk merancang dan mengimplementasikan sistem pemantauan nutrisi secara real-time berbasis Internet of Things (IoT) pada bibit padi semai kering di Desa Bodeh, Pemalang. Sistem ini menggunakan sensor untuk mengukur parameter penting seperti kelembaban tanah, pH, dan kandungan unsur hara atau nutrisi, yang kemudian dikirimkan ke platform interface berbasis website untuk dipantau melalui perangkat seluler atau komputer. Dengan adanya sistem ini, petani dapat memperoleh informasi secara cepat dan akurat, sehingga dapat mengambil langkah yang tepat dalam pemberian nutrisi untuk memastikan pertumbuhan bibit yang optimal.
Co-Authors Alwy Muhammad Ravi Arif Abdul Aziz M Rivaldi Ali Septian Muhammad Zakiyullah Romdlony