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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal INFOTEL
PANDJAITAN, LANNY
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Computer Science & IT Electrical & Electronics Engineering Engineering

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Analisis Pengaruh Teknik Coakan Dua Langkah terhadap Penurunan Torka Cogging terhadap Pergeseran Poros pada Mesin Magnet Permanen CORREIA, LUCIO ALFREDO; NUR, TAJUDDIN; PANDJAITAN, LANNY; HERLINA, HERLINA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 12, No 4: Published October 2024
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v12i4.1007

Abstract

ABSTRAKTorsi cogging adalah torsi yang terjadi akibat interaksi antara gaya tangensial di ujung magnet dengan material alur stator, yang menahan gerakan rotor pada generator magnet permanen. Torsi ini harus diminimalkan dalam aplikasi turbin angin karena dapat menghambat pergerakan awal generator. Penelitian ini bertujuan untuk menganalisis pengaruh metode tertentu dalam mengurangi torsi cogging dan pergeseran poros. Metode yang digunakan melibatkan penerapan coakan dua tingkat pada ujung magnet rotor dengan tiga konstruksi magnet rotor yang berbeda, sementara kondisi inti stator tetap identik. Analisis numerik menggunakan FEMM 4.2 menunjukkan pengurangan torsi cogging yang signifikan sebesar 99,70% dan pengurangan pergeseran poros sebesar 60% secara vertikal dan 51% secara horizontal.Kata kunci: coakan dua tingkat, generator magnet permanen, gaya magnet tangensial, torka cogging, pergeseran poros ABSTRACTCogging torque is the torque resulting from the interaction between tangential forces at the magnet's edge and the stator slot material, which opposes the rotor's motion in a permanent magnet generator. This torque must be minimized in wind turbine applications as it can hinder the generator's initial movement. This study aims to analyze the effect of a specific method on reducing cogging torque and shaft shifting. The method involves applying a two-step notch at the rotor magnet's edge with three different rotor magnet constructions, while keeping the stator core conditions identical. Numerical analysis using FEMM 4.2 achieved a significant cogging torque reduction of 99.70% and reduced shaft displacement by 60% vertically and 51% horizontally.Keywords: Two-step notch, permanent magnet generator, tangential magnetic force, shaft shifting
Performance Comparison of HFC and FTTH Using Optisystem Software Putra, Dwi Permana; Siregar, Marsul; Pandjaitan, Lanny; Bachri, Karel O; Sereati, Catherine O
JURNAL INFOTEL Vol 17 No 2 (2025): May
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v17i2.1271

Abstract

This research present the Analysis of the application of Optisystem software technology for FTTH and HFC shows that both have the capability for the WDM systems, to support a maximum transmission distance of 20 kilometers and can serve up to 32 subscribers. Key factors such as signal strength, Q factor, and bit error rate (BER) were observed and analyzed discreetly. It was found that FTTH has an average Q factor of 13.49 and HFC has an average Q factor of 7.475. The difference is about 44.59%, which indicates that FTTH has an advantage in terms of signal quality. However, based on the simulation results as well as the field measurements, Since the BER value does not exceed the maximum limit of 10-9 and the Q-factor value exceeds the minimum limit of 6, it can be stated that both technologies are reliable for efficient and high-quality communication services.
Co-Authors Bachri, Karel O CORREIA, LUCIO ALFREDO Herlina Herlina Nur, Tajuddin Putra, Dwi Permana Sereati, Catherine O Siregar, Marsul