Analisis Pengaruh Jumlah Kutub, Besar Arus, dan Radial Clearance terhadap Gaya Radial pada Active Magnetic Bearing

Iffagano, Muh Iqra Al Hamidy (2020) Analisis Pengaruh Jumlah Kutub, Besar Arus, dan Radial Clearance terhadap Gaya Radial pada Active Magnetic Bearing. Undergraduate thesis, Institute Teknologi Sepuluh Nopember.

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Abstract

Magnetic bearing dibagi menjadi dua jenis yaitu passive magnetic bearing dan active magnetic bearing. Pada tipe passive magnetic bearing beban yang dapat ditumpu tidak dapat bervariasi, bergantung pada kemampuan material magnet yang dipilih. Untuk menghasilkan gaya yang besar maka harus memperbesar dimensi dari magnet permanen tersebut, yang mana bearing merupakan komponen yang cukup kecil dalam elemen mesin. Oleh karena itu dilakukan penelitian magnetic bearing tipe lain yaitu active magnetic bearing guna meneliti parameter-parameter yang mempengaruhi besar gaya radial dari active magnetic bearing. Active magnetic bearing memanfaatkan induksi magnetik yang timbul akibat adanya arus listrik yang mengalir pada kumparan sehingga mampu menggantikan fungsi dari magnet permanen yang ada pada tipe passive magnetic bearing. Penelitian ini diharapkan bisa meningkatkan kinerja dari magnetic bearing. Penelitian mengenai active magnetic bearing dilakukan guna mengetahui beban maksimal yang mampu diterima pada active magnetic bearing dan mengetahui pengaruh dari setiap variasi penelitian terhadap kemampuan angkat beban active magnetic bearing. Kemudian dilakukan perbandingan kemampuan angkat beban antara active magnetic bearing dengan mechanical bearing pada ukuran yang sama sehingga didapatkan karatkteristik dari masing – masing tipe bearing tersebut. Pembuatan desain dan simulasi desain dilakukan dengan menggunakan software Ansys Electronic Maxwell 3D 19R1. Simulasi dilakukan dengan tiga variasi, yaitu variasi radial clearance, jumlah kutub, dan besar arus. Variasi penelitian dilakukan guna meneliti pengaruh ketiga variasi tersebut terhadap beban maksimal yang mampu diterima oleh active magnetic bearing. Variasi radial clearance diatur dengan jarak sebesar 1 mm, 1.5 mm, dan 2 mm, dengan masing – masing variasi radial clearance dilakukan pergeseran rotor dengan rasio eccentricity sebesar 0.6 hingga 1dari besar radial clearace yang digunakan. Variasi jumlah kutub dilakukan dengan konfigurasi magnetic bearing tipe heteropolar 6 kutub, 8 kutub, dan 10 kutub, menyeseuaikan batasan ukuran bearing yang digunakan. Variasi besar arus dilakukan dengan rentang arus 1-3 A, menyesuaikan batasan lilitan yang digunakan. Berdasarkan hasil penelitian yang telah dilakukan diketahui bahwa radial clearance paling optimal terjadi pada radial clearance 1 mm dengan rasio eccentricity 0.9. Dengan menyesuaikan batasan dimensi yang ada, jumlah kutub paling optimal terjadi pada jumlah kutub maksimal yaitu 10 kutub, yang mana pada konfigurasi 10 kutub distribusi flux density yang dihasilkan paling merata jika dibandingkan dengan jumlah kutub 6 dan 8. Dengan menyesuaikan batasan pemilihan lilitan, didapatkan besar arus paling optimal yaitu sebesar 3 Ampere. Dengan konfigurasi radial clearance, jumlah kutub, dan besar arus tersebut dapat dihasilkan nilai gaya radial yang maksimal sebesar 704,82 N. ================================================================================================================ Magnetic bearing is divided into two types, passive magnetic bearing and active magnetic bearing. In passive magnetic bearing the load that can be supported cannot be varied, but depends on the selected magnetic material. To produce a large force, it must enlarge the dimensions of the permanent magnet, but we know that bearing is a small component in the engine element. Therefore another type of magnetic bearing research is carried out, that is active magnetic bearing to examine the parameters that affect the radial force of the active magnetic bearing. Active magnetic bearing utilize magnetic induction that arising from a flowing electric current in the coil, so that they can replace the function of permanent magnet in passive magnetic bearing. This research is expected to improve the performance of magnetic bearing. Research on active magnetic bearing was carried out to analys the maximum load that can be accepted on active magnetic bearing and the effect of each variations on the carrying load capacity on active magnetic bearing. Then do the comparasion between carrying load capacity on active magnetic bearing and mechanical bearing of the same size so Design making and design simulation is done using Ansys Electronic Maxwell 3D 19R1. Simulation are carried out to examine the effect of variations made on active magnetic bearing, namely radial clearance, number of pole, and coil current. Variations in this study were carried out to analysis the effect of these three variations on the maximum load of active magnetic bearing. Radial clearance variations are set with a distance of 1 mm, 1.5 mm, and 2 mm, with each variations of radial clearance the rotor will be shifted with an eccentricity ratio of 0.6 to 1 from the radial clearance used. Variation of number poles is done by magnetic bearing configuration of 6 poles, 8 poles, and 10 poles, adjusting the size limitation od the bearing used The variation of the coil current is carried out in the 1 Ampere to 3 Ampere current range, adjusting the winding type that used. Based on the result of this research, it is known that the optimal radial clearance is obtained by 1 mm with an eccentricity ratio of 0.9. By adjusting the dimensional limitation, the optimal number of poles occurs at the maximum number of poles, which is 10 poles, where in the 10 poles configuration flux density distribution is the most even when compared to number of poles 6 and 8. By adjusting the winding type limitations, the most optimal coil current is 3 Ampere. With radial clearance, number of poles, and coil current configuration a maximum radial force value of 704.82 N can be produced

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Besar Arus, Jumlah Kutub, Radial Active Magnetic Bearing, Radial Clearance, Coil Current, Number of Poles, Radial Active Magnetic Bearing, Radial Clearance
Subjects: Q Science > QC Physics > QC765 Magnetic materials
T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: MUH IQRA AL HAMIDY IFFAGANO
Date Deposited: 23 Aug 2020 15:05
Last Modified: 23 Aug 2020 15:05
URI: https://repository.its.ac.id/id/eprint/79394

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