Analisis Dan Optimasi Ukuran Planetary Magnetic Gear Rasio 4:1 Terhadap Densitas Torsi (Variasi Ketebalan Magnet Radial Serta Duty Cycle Factor)

Pamungkas, Fahmy Satrya (2019) Analisis Dan Optimasi Ukuran Planetary Magnetic Gear Rasio 4:1 Terhadap Densitas Torsi (Variasi Ketebalan Magnet Radial Serta Duty Cycle Factor). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Roda gigi merupakan salah satu elemen penting dalam mesin untuk melakukan perpindahan daya. Hal tersebut akan menimbulkan acoustic noise dan getaran dimana akan mengurangi kenyamanan serta reliability dari mesin tersebut.. Magnetic gear memiliki keunggulan mengurangi acoustic noise dan getaran, meningkatkan reliability, minim perawatan serta overload protection. Terdapat beberapa faktor yang diperlukan untuk mendapatkan torque density yang paling maksimum dalam planetary magnetic gear.
Penelitian ini dilakukan untuk mendapatkan torque density dari planetary magnetic gear paling maksimum pada rasio 4:1 outer rotor ditahan dengan metode analisis serta optimasi ukuran. Ditentukan analisis torsi menggunakan variasi konfigurasi pasang magnet dan iron segment serta ketebalan magnet radial untuk mendapat satu konfigurasi yang menghasilkan torque density paling maksimum. Analisis torque density dilakukan menggunakan tiga buah variasi yaitu, variasi I (Ph = 2, Pl = 6, dan Ns = 8); variasi II (Ph = 4, Pl = 12, dan Ns = 16); dan variasi III (Ph = 6, Pl = 18, dan Ns = 24) dengan variasi ketebalan masing-masing 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, dan 12 mm. Setelah didapat suatu konfigurasi dengan torque density paling maksimum, selanjutnya dilakukan proses optimasi ukuran dari perpaduan antara ketebalan pasang magnet pada low speed rotor dan high speed rotor dengan nilai outer volume dan total ketebalan permanen magnet yang sama. Proses optimasi ukuran dilakukan dengan menentukan design variabel, objective function, equality contrains, inequality contrains dan cost function. Proses optimasi dilakukan dengan menggunakan metode sequential nonlinear programming optimizer pada software Ansys Electronic v18.Setelah didapat geometri dari proses optimasi ukuran, dilakukan simulasi variasi berupa duty cycle factor untuk mendapat nilai torque density lebih maksimal. Simulasi variasi duty cycle factor dilakukan dengan menggunakan variasi θ_A dan θ_B sesuai jumlah iron segment. Hasil simulasi dinyatakan berhasil apabila telah sesuai dengan parameter design yang telah ditentukan.
Dari hasil penelitian pada ketiga buah variasi dengan masing-masing ketebalan didapatkan nilai torsi yang semakin meningkat seiring dengan bertambahnya ketebalan magnet. Nilai torque density paling maksimum dihasilkan pada variasi konfigurasi pasang magnet II dengan ketebalan 10 mm yaitu sebesar 161,75 kNm/m3. Pada proses optimasi ukuran, dihasilkan nilai torque density sebesar 172,78 kNm/m3. Sedangkan pada proses simulasi variasi duty cycle factor dihasilkan torque density maksimum 184,31 kNm/m3 dengan nilai duty cycle factor 0,57. Sehingga peningkatan torque density yang dihasilkan setelah melalui proses optimasi ukuran dan simulasi variasi duty cycle factor adalah 13,94%. Dari hasil diatas menunjukkan bahwa metode analisis serta optimasi yang dilakukan pada penelitian ini menghasilkan peningkatan nilai torsi yang cukup signifikan. Penelitian kali ini menghasilkan geometri akhir planetary magnetic gear rasio 4:1 paling maksimum.
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The gear is one of the important elements in the machine for carrying out power transfer. This will lead to acoustic noise and vibration which will reduce the comfort and reliability of the engine. Magnetic gear has the advantage of reducing acoustic noise and vibration, increasing reliability, minimal maintenance and overload protection. There are several factors needed to get the most maximum torque density in planetary magnetic gear.
This research was conducted to get the maximum torque density from planetary magnetic gear at ratio 4:1 in the outer rotor movement configuration with an analysis and size optimization method. Determined torque analysis uses variations in the configuration of pairs of magnets and iron segments and the thickness of radial magnets to obtain a configuration that produces the maximum torque density. Torque density analysis was carried out using three variations, namely, variation I (Ph = 2, Pl = 6, and Ns = 8); variation II (Ph = 4, Pl = 12, and Ns = 16); and variation III (Ph = 6, Pl = 18, and Ns = 24) with variations in thickness of 2 mm, 4 mm, 6 mm, 8 mm, 10 mm and 12 mm respectively. After obtaining a configuration with the maximum torque density, then the size optimization process is performed from a combination of the thickness of the magnetic pairs in low speed rotors and high speed rotors with the outer volume value and the total permanent thickness of the same magnet. The process of size optimization is done by determining the design variable, objective function, equality contrains, inequality contrains and cost functions. The optimization process is carried out by using the sequential nonlinear programming optimizer method in the Ansys Electronic v18 software. After the geometry of the size optimization process is obtained, variation simulations are carried out in the form of a duty cycle factor to obtain the maximum torque density value. Simulation of variations in duty cycle factors is done by using variations θ_A and θ_B according to the number of iron segments. Simulation results are declared successful if they are in accordance with predetermined design parameters.
From the results of the research on the three variations with each thickness, the torque value is obtained which increases with increasing magnetic thickness. The maximum maximum torque density value is generated in variations of the magnet II configuration with a thickness of 10 mm which is equal to 161.75 kNm / m3. In the process of size optimization, the torque density value was 172.78 kNm / m3. While the simulation process variations in duty cycle factor produced a maximum torque density of 184.31 kNm / m3 with a value of 0.57 duty cycle factor. So that the increase in torque density generated after going through the size optimization process and simulation of variations in duty cycle factor is 13.94%. From the results above, it shows that the analysis and optimization methods carried out in this study result in a significant increase in torque value. The present study produced the maximum maximum 4 planetary magnetic gear ratio geometry.

Item Type:	Thesis (Undergraduate)
Additional Information:	RSM 621.833 Pam a-1 2019
Uncontrolled Keywords:	Planetary gear, Magnetic gear, Torque density, Optimasi ukuran.
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	PAMUNGKAS FAHMY SATRYA
Date Deposited:	23 Oct 2021 09:13
Last Modified:	23 Oct 2021 09:13
URI:	http://repository.its.ac.id/id/eprint/61465

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