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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) JASTEN (Jurnal Aplikasi Sains Teknologi Nasional
Yusuf Ismail Nakhoda
National Institute of Technology Malang
Arts Humanities Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Physics Other

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Modeling of Maximum Power Point Tracking Controller for Solar Power System Aryuanto Soetedjo; Abraham Lomi; Yusuf Ismail Nakhoda; Awan Uji Krismanto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 3: September 2012
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v10i3.819

Abstract

 In this paper, a Maximum Power Point Tracking (MPPT) controller for solar power system is modeled using MATLAB Simulink. The model consists of PV module, buck converter, and MPPT controller. The contribution of the work is in the modeling of buck converter using equation model approach rather than circuit model one.  The buck converter model is developed using equation model that allowing the input voltage of the converter, i.e. output voltage of PV is changed by varying the duty cycle, so that the maximum power point could be tracked when the environmental changes. From the experiment, the developed model comforms with the circuit model provided by MATLAB Simulink Power Simulation. Furher, the simulation results show that the developed model performs well in tracking the maximum power point (MPP) of the PV module using Perturb and Observe (P&O) Algorithm. 
THE EFFECT OF AIR GAP DISTANCE VARIATION BETWEEN STATOR AND ROTOR IN PERMANENT MAGNET GENERATOR WITH LOW ROTATION MULTI-DISC AXIAL FLUX Yusuf Ismail Nakhoda; Choirul Saleh
JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) Vol 3, No 1 (2020): February 2020
Publisher : Merdeka Malang University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jeemecs.v3i1.3999

Abstract

This axial flux permanent magnet generator was designed in low speed multi-disc using two stator discs and three rotor discs, wherein each rotor disc contained ten poles of Neodynium type permanent magnet and each stator had ten coils, in order to be able to produce 600 rpm generator rotation. The voltage prepared in each stator phase output would later be connected in series or parallel circuit for testing. This generator was tested with variations of air gap between different rotors and stators. There were four variations of air gap which were 2 mm, 3 mm, 4 mm, and 5 mm and each of them were connected to stator circuit in series. The test results with an air gap of 2 mm generated voltage of 59 Volt AC, an air gap of 3 mm generated a voltage of 53.7 Volt AC, an air gap of 4 mm generated a voltage of 49.6 Volt AC, an air gap of 5 mm generated a voltage of 48.5 Volt AC. Based on the test results, it can be concluded that the gap of the air gap was inversely proportional to the output voltage, the greater the value of the air gap that was applied, the smaller the voltage generator output was generated.
Rancang Bangun Alat Proses Fermentasi Kedelai Menggunakan Kendali Suhu Dan Kelembaban Untuk Produksi Tempe Skala Kecil Yusuf Ismail Nakhoda; Aryuanto Soetedjo; Pravasta Ongko S
JASTEN (Jurnal Aplikasi Sains Teknologi Nasional) Vol. 1 No. 1 (2020)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Institut Teknologi Nasional Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (400.553 KB) | DOI: 10.36040/jasten.v1i1.3087

Abstract

In making tempeh, the fermentation process is an important process. The fermentation process of tempeh really determines the quality of the tempe produced. In the conventional method, the temperature and humidity in the tempe fermentation process are not regulated, so the fermentation results are strongly influenced by the weather. In general, the fermentation process for tempeh takes about one and a half days. With technological advances in electronics, temperature and humidity can be controlled according to the desired range. By utilizing temperature and humidity controllers in the tempe fermentation process, the time of making tempe can be accelerated without reducing the quality of the tempe produced. From the test results, it was found that the controller was able to maintain an average temperature of 37.63 0C, an average humidity of 57.46%, and was able to accelerate the fermentation process of tempeh within 24 hours with an average power consumption of 212.27 Watt and used to produce tempe for small scale tempe craftsmen.
Co-Authors Abraham Lomi Aryuanto Soetedjo Awan Uji Krismanto Choirul Saleh Pravasta Ongko S