Analisis Pengaruh Variasi Airgap dan Jarak Eksentrik Poros Input terhadap Torsi Cycloid Magnetic Gear

Razaq, Faiz Johan (2018) Analisis Pengaruh Variasi Airgap dan Jarak Eksentrik Poros Input terhadap Torsi Cycloid Magnetic Gear. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Magnetic gear mampu bekerja sebagai transmisi daya tanpa adanya kontak antar gigi. Sehingga magnetic gear bisa menjadi solusi untuk mechanical gear karena mechanical gear sering mengalami kegagalan akibat tegangan kontak dan tegangan bending yang bekerja pada gigi-gigi yang bersinggungan. Dalam pembuatan magnetic gear, airgap dan jarak eksentrik poros input sangat berpengaruh terhadap torsi. Penelitian ini menganalisis variasi airgap dan jarak eksentrik poros input pada cycloid magnetic gear dengan rasio gear yaitu -1:30 dan menggunakan software Ansys Maxwell 3D. Simulasi transient dilakukan pada masing-masing variasi untuk mendapatkan sudut putaran inner gear yang menghasilkan torsi maksimal. Selanjutnya dilakukan simulasi magnetostatic untuk mendapatkan torsi maksimal yang lebih akurat, kontur induksi magnetik (B), dan grafik resultan induksi magnetik (Btotal), induksi magnetik pada arah sumbu-X (Bx), induksi magnetik pada arah sumbu-Y (By), dan induksi magnetik pada arah sumbu-Z (Bz) di daerah airgap. Hasil dari penelitian ini yaitu bertambahnya airgap mengakibatkan penurunan torsi cycloid magnetic gear. Penurunan torsi terjadi karena induksi magnetik di daerah airgap semakin berkurang dengan bertambahnya airgap. Peningkatan airgap dari 0,2 mm ke 1 mm, 1 mm ke 2 mm, dan 2 mm ke 3 mm mampu menurunkan torsi dalam kisaran 20,193% - 26,709% (13,84 N.m - 27,65 N.m). Bertambahnya jarak eksentrik poros input mengakibatkan penurunan torsi cycloid magnetic gear. Semakin besar jarak eksentrik poros input membuat jarak antara inner gear dan outer gear menjadi semakin bertambah, sehingga induksi magnetik di daerah airgap menjadi semakin berkurang dan torsi yang dihasilkan menjadi turun. Namun torsi untuk jarak eksentrik poros input 1 mm dan 2 mm memiliki nilai lebih rendah daripada jarak eksentrik poros input 3 mm karena karena terjadi pelemahan induksi magnetik di posisi airgap 270° sehingga torsi menjadi rendah. Peningkatan jarak eksentrik poros input dari 1 mm ke 2 mm, 2 mm ke 3 mm, 3 mm ke 4 mm, dan 4 mm ke 5 mm mampu mengubah torsi dalam kisaran 0,945% - 45,420% (0,775 N.m - 36,478 N.m). Cycloid magnetic gear yang memiliki densitas torsi tinggi yaitu memiliki airgap dan jarak eksentrik poros input yang kecil pada desain. Dalam penelitian ini, densitas torsi paling tinggi yang diperoleh yaitu 125,923 kN.m/m3 dengan menggunakan airgap 0,2 mm dan jarak eksentrik poros input 3 mm. ===================================================================================================== Magnetic gear able to work as a power transmission without any contact between the teeth. Magnetic gear can be a solution for mechanical gear because mechanical gear often failed due to contact stress and bending stress acting on the teeth that intersect. In the manufacture of magnetic gears, airgap and eccentric distance of input shaft greatly affect the torque. This study analyzed the variation of airgap and eccentric distance of input shaft on cycloid magnetic gear with the gear ratio is -1:30 and using software Ansys Maxwell 3D. Transient simulations are performed on each variation to obtain inner gear rotation angle that produces maximum torque. Then magnetostatic simulation performed to obtain more accurate maximum torque, magnetic induction (B) contour, and graph of magnetic induction magnitude (Bmagnitude), magnetic induction on X-axis direction (Bx), magnetic induction on Y-axis direction (By), and magnetic induction on Z-axis direction (Bx) in airgap region. The result of this research is the increase of airgap resulting the decrease of torque of cycloid magnetic gear. The decrease of torque happened because magnetic induction in airgap region decrease by the increase of airgap. The increase of airgap from 0,2 mm to 1 mm, 1 mm to 2 mm, and 2 mm to 3 mm can decrease the torque in the range of 20,193% - 26,709% (13,84 N.m - 27,65 N.m). The increase of eccentric distance of input shaft resulting the deacrease of torque of cycloid magnetic gear. The greater of eccentric distance of input shaft makes the distance between inner gear and outer gear becomes more streched so the magnetic induction in airgap region decrease and the torque decrease. But the torque for eccentric distance of the input shaft 1 mm and 2 mm has lower value than eccentric distance of the input shaft 3 mm because magnetic induction weakening in the position of airgap 270° so that the torque becomes low. The increase of eccentric distance of input shaft from 1 mm to 2 mm, 2 mm to 3 mm, 3 mm to 4 mm, and 4 mm to 5 mm can change the torque in the range of 0,945% - 45,420% (0,775 N.m - 36,478 N.m). Cycloid magnetic gear that has high torque density has small airgap and eccentric distance of input shaft in the design. In this research, the highest torque density is 125,923 kN.m/m3 by using airgap 0,2 mm and eccentric distance of input shaft 3 mm.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 621.833 Raz a-1
Uncontrolled Keywords: Airgap, Cycloid Magnetic Gear, Jarak Eksentrik, Magnet Permanen, Torsi
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ230 Machine design
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Faiz Johan Razaq
Date Deposited: 17 Jun 2021 06:55
Last Modified: 17 Jun 2021 06:55
URI: https://repository.its.ac.id/id/eprint/54017

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