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All Journal Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Advance Sustainable Science, Engineering and Technology (ASSET) KOLECER: Scientific Journal of Mechanical Engineering
Syahbardia
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Automotive Engineering Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Eksplorasi kinerja sepeda listrik hibrida dengan menggunakan kontroler speed control 60A: Studi Eksperimental Syahbardia; Sentana, Agus; Lazuardi, Dedi; Herdiyanto, Ghian
KOLECER Scientific Journal of Mechanical Engineering Vol. 1 No. 1 (2025): March 2025
Publisher : Program Studi Teknik Mesin Fakultas Teknik Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/ksjme1120252315229-36

Abstract

Sepeda listrik hibrida yang dibuat melalui modifikasi sepeda konvensional memerlukan speed controller pada motor listrik agar putaran roda dapat diatur sesuai kebutuhan pengguna. Modifikasi ini terdiri dari beberapa tahap, dan penelitian ini berfokus pada tahap akhir, yaitu pemasangan sistem pengatur putaran motor listrik. Salah satu metode yang digunakan untuk mengatur tegangan terminal (Vt) adalah Pulse Width Modulation (PWM). Pada penelitian ini, sistem PWM menggunakan MOSFET P75NF75 yang mampu mengontrol kecepatan motor listrik DC dengan arus hingga 80 Ampere. Rangkaian kontroler ini dirancang dengan menggunakan penguat operasional (Op-Amp) sebagai pembangkit sinyal PWM, yang memungkinkan penyesuaian tegangan kerja sesuai dengan spesifikasi motor listrik yang digunakan. Pengujian kinerja sistem dilakukan dengan menggunakan amperemeter, voltmeter, tachometer, dan stopwatch untuk mengukur berbagai parameter performa. Hasil penelitian menunjukkan bahwa kontroler PWM 60A dapat dipasang dan berfungsi dengan baik pada sepeda listrik hibrida yang telah dimodifikasi. Sistem ini mampu mengatur percepatan dan deselerasi dengan potensiometer sebagai pengendali utama. Dari pengujian, sepeda listrik ini mampu mencapai kecepatan maksimum 30,29 km/jam dengan daya keluaran sebesar 570,87 watt. Penelitian ini menunjukkan bahwa penerapan sistem kontrol PWM pada sepeda listrik hibrida dapat meningkatkan efisiensi pengendalian kecepatan serta memberikan kenyamanan dan fleksibilitas dalam penggunaannya.
Synthesis of Silica Gel From Rice Husk Ash for Sustainable Air Conditioning Requirements Syahbardia; Berkah Fajar Tamtomo Kiono; Sonny Handojo Winoto; Mohamad Said Kartono Tony Suryo; Dedi Lazuardi
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.1944

Abstract

An increase in air conditioning demand, driven by global warming and the need for comfort, highlights the importance of energy-efficient systems like desiccant cooling. This research explores using rice husk ash (RHA), an agricultural waste product from Indonesia, to synthesize silica gel for these systems. The study involved synthesizing silica gel from RHA through chemical processes and comparing its sorption capacity to commercial silica gel. Two synthesis methods were tested: a direct reaction of water glass with acid compounds and an impregnation process on honeycomb walls. The results indicate that the direct reaction method produces a silica gel with better pore performance. Ultimately, the study found that RHA from West Java, Indonesia, is a viable raw material for desiccant air conditioning, although its sorption capacity is slightly lower than that of commercial silica gel. This offers a valuable use for agricultural waste.
Surface waviness of weld bead (layer) of GTAW based wire arc additive manufacturing process Sentana, Agus; Syahbardia; Nugroho, Mabel Agung; Baskoro, Ario Sunar
Teknobiz : Jurnal Ilmiah Program Studi Magister Teknik Mesin Vol. 16 No. 1 (2026): Teknobiz
Publisher : Magister Teknik Mesin Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/pjxva503

Abstract

Additive manufacturing has become a focus of industry and research due to the many new developments in processes and systems. This is further strengthened by the trend of resource efficiency, as manufacturing processes towards additive manufacturing offer the possibility of producing close to the required size shape. Additive manufactured products can experience surface imperfections assessed in this study, namely the morphology profile or surface curvature (surface waviness) of the weld bead layer. Generally, surface curvature can be referred to as a "hump" caused by the welding process. To achieve the target of achieving products with relatively minimal surface waviness, experiments and analysis of the manufacturing process using GTAW additive welding on AA 6061 substrate material with ER 5356 filler were conducted. The experiments were carried out by first determining the process parameters and factors that affect the quality of the weld bead layer. The layers stacked in layers were measured for their width and height geometry, surface waviness tests were conducted, and analysis was carried out. The deposition rate or filler deposit, travel speed, and filler feed speed determine the level of surface waviness. In this study, high surface curvature occurred at a wire feeder speed (WFS) of 25 mm/s with a travel speed (TS) of 80 mm/min.
Co-Authors Agus Sentana Agus Ario Sunar Baskoro Berkah Fajar Tamtomo kiono Dedi Lazuardi Herdiyanto, Ghian Lazuardi, Dedi Mohamad Said Kartono Tony Suryo Nugroho, Mabel Agung Sonny Handojo Winoto