Analisis Pengaruh Air Gap dan Rasio Ketebalan Magnet Terhadap Gaya Aksial Pada Permanent Magnetic Bearing

Utari, Diah (2019) Analisis Pengaruh Air Gap dan Rasio Ketebalan Magnet Terhadap Gaya Aksial Pada Permanent Magnetic Bearing. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bearing memegang peranan penting dalam menjalankan peralatan yang menunjang kehidupan manusia, salah satunya transportasi. Fungsi utama bearing adalah untuk mengurangi gesekan dan menjaga komponen yang bergerak linier agar selalu pada jalurnya. Salah satu bearing yang banyak digunakan yaitu angular contact ball bearing. Kerusakan pada bearing menjadi alasan paling sering yang menyebabkan mesin breakdown. Maka perlu dilakukan inovasi perancangan yang tepat, teliti, dan akurat, seperti magnetic bearing. Magnetic bearing dapat dengan signifikan menghilangkan gesekan dan mengefisiensi energi. Penelitian ini dilakukan untuk merancang sebuah axial permanent magnetic bearing untuk dibandingkan dengan produk bearing dari NSK Bearing Co., Ltd dengan kode 7003 A W (M), T, TYN DB DF DT.
Analisis dilakukan dengan variabel air gap, air gap minimum yang digunakan adalah 0,01 mm dan air gap maksimum yang digunakan adalah 3 mm. Selanjutnya analisis dengan variabel ketebalan magnet, tebal magnet didapat dengan memperbesar tebal inner dan memperkecil tebal outer berdasarkan rasio ketebalan yang disusun, begitu pula sebaliknya. Analisis meliputi permodelan pada proses simulasi dan parameter yang diukur. Setelah dilakukan pemodelan pada software ANSYS Electronics Maxwell 3D, dilakukan simulasi dengan menggunakan penyelesaian magnetostatic. Hasil analisa magnetostatic berhasil apabila hasil yang didapatkan memiliki energy error yang konvergen dan sesuai dengan parameter yang telah ditentukan dengan besar nilai error dibawah atau sama dengan 1 %.
Berdasarkan hasil penelitian terlihat bahwa air gap dan rasio ketebalan magnet memiliki pengaruh terhadap gaya aksial yang dihasilkan permanent magnetic bearing. Variasi air gap sebesar 0,01 mm merupakan variasi celah udara yang menghasilkan gaya aksial terbesar yaitu 76,85 N. Namun terdapat kekurangan yang terjadi akibat dari celah udara yang terlalu kecil yaitu gaya aksial yang dihasilkan menjadi fluktuatif dan proses pembuatan permanent magnetic bearing terbilang tidak mudah sehingga perlu dilakukan banyak pertimbangan lebih lanjut. Pada variasi ketebalan magnet saat tebal inner lebih besar dibandingkan tebal outer dengan rasio ketebalan inner dibanding outer 9/7 didapatkan gaya aksial maksimal sebesar 61,625 N.
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Bearing plays an important role in carrying out equipment that supports human life, one of them is transportation. The main function of the bearing is to reduce friction and keep the linear moving components in line. One bearing that is widely used is angular contact ball bearing. Bearing damage is the most frequent reason that causes the engine to breakdown. So it is necessary to do precise design innovations, detail and accurate, such as magnetic bearings. Magnetic bearings can significantly eliminate friction and reduce energy efficiency. This research was conducted to design an axial permanent magnetic bearing for comparison with bearing products from NSK Bearing Co., Ltd with code 7003 A W (M), T, TYN DB DF DT.
The analysis was done with variable air gap, the minimum air gap used is 0.01 mm and the maximum air gap used is 3 mm. Furthermore, by analyzing the thickness of the magnet, the thickness of the magnet was obtained by enlarging the inner thickness and reducing the thickness of the outer based on the thickness ratio arranged, and vice versa. Analysis included modeling the simulation process and measured parameters. After modeling the ANSYS Electronics Maxwell 3D software, a simulation was performed using magnetostatic solutions. The results of magnetostatic analysis were successful if the results obtained have a convergent energy error and are in accordance with predetermined parameters with a large error value below or equal to 1%.
Based on the results of the research, it could be seen that the air gap and the thickness ratio of the magnet have an influence on the axial force produced by permanent magnetic bearing. The variation of the air gap of 0.01 mm was the variation of the air gap which results in the largest axial force of 76.85 N. However, there were deficiencies that occur due to the air gap that was too small, the axial force produced becomes fluctuating and the process of making permanent magnetic bearings was not easy so it needs further consideration. In variations in magnetic thickness when inner thickness was greater than outer thickness with inner thickness ratio compared to outer 9/7 the maximal axial force is 61.625 N.

Item Type:	Thesis (Undergraduate)
Additional Information:	RSM 621.822 Uta a-1 2019
Uncontrolled Keywords:	Air Gap, Rasio Ketebalan Magnet, Flux density, Gaya Aksial, Magnetic Bearing
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:	Diah Utari
Date Deposited:	22 Dec 2021 01:56
Last Modified:	22 Dec 2021 01:56
URI:	http://repository.its.ac.id/id/eprint/61740

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