Effect of Magnetorheological Grease’s Viscosity to the Torque Performance in Magnetorheological Brake
Recently, magnetorheological grease (MRG) has been utilized in magnetorheological (MR) brakes to generate a braking torque based on the current applied. However, the high initial viscosity of MRG has increased the off-state torque that led to the viscous drag of the brake. Therefore, in this study,...
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Multidisciplinary Digital Publishing Institute (MDPI)
2022
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| Online Access: | https://eprints.ums.edu.my/id/eprint/34849/2/FULL%20TEXT.pdf https://eprints.ums.edu.my/id/eprint/34849/1/ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/34849/ https://www.mdpi.com/1996-1944/15/16/5717/htm https://doi.org/10.3390/ma15165717 |
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| author | Khairul Anwar Abdul Kadir Nurhazimah Nazmi Norzilawati Mohamad Muhammad Kashfi Shabdin Dimas Adiputra Saiful Amri Mazlan Nur Azmah Nordin Shahir Mohd Yusuf Ubaidillah |
| author_facet | Khairul Anwar Abdul Kadir Nurhazimah Nazmi Norzilawati Mohamad Muhammad Kashfi Shabdin Dimas Adiputra Saiful Amri Mazlan Nur Azmah Nordin Shahir Mohd Yusuf Ubaidillah |
| author_sort | Khairul Anwar Abdul Kadir |
| building | UMS Library |
| collection | Institutional Repository |
| content_provider | Universiti Malaysia Sabah |
| content_source | UMS Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | Recently, magnetorheological grease (MRG) has been utilized in magnetorheological (MR) brakes to generate a braking torque based on the current applied. However, the high initial viscosity of MRG has increased the off-state torque that led to the viscous drag of the brake. Therefore, in this study, the off-state viscosity of MRG can be reduced by the introduction of dilution oil as an additive. Three samples consist of pure MRG (MRG 1) and MRG with different types of dilution oil; hydraulic (MRG 2) and kerosene (MRG 3) were prepared by mixing grease and spherical carbonyl iron particles (CIP) using a mechanical stirrer. The rheological properties in the rotational mode were examined using a rheometer and the torque performances in MR brake were evaluated by changing the current of 0 A, 0.4 A, 0.8 A, and 1.2 A with fixed angular speed. The result shows that MRG 3 has the lowest viscosity which is almost 93% reduction while the viscosity of MRG 2 has lowered to 25%. However, the torque performances generated by MRG 3 were highest, 1.44 Nm, when 1.2 A of current was applied and followed by MRG 2 and MRG 1. This phenomenon indicated that the improvement of torque performances was dependent on the viscosity of MRG. By reducing the viscosity of MRG, the restriction on CIP to form chain formation has also decreased and strengthen the torque of MRG brake. Consequently, the utilization of dilution oil in MRG could be considered in MR brake in near future. |
| format | Article |
| id | my.ums.eprints-34849 |
| institution | Universiti Malaysia Sabah |
| language | en en |
| publishDate | 2022 |
| publisher | Multidisciplinary Digital Publishing Institute (MDPI) |
| record_format | eprints |
| spelling | my.ums.eprints-348492022-11-15T01:58:04Z https://eprints.ums.edu.my/id/eprint/34849/ Effect of Magnetorheological Grease’s Viscosity to the Torque Performance in Magnetorheological Brake Khairul Anwar Abdul Kadir Nurhazimah Nazmi Norzilawati Mohamad Muhammad Kashfi Shabdin Dimas Adiputra Saiful Amri Mazlan Nur Azmah Nordin Shahir Mohd Yusuf Ubaidillah QC501-766 Electricity and magnetism Recently, magnetorheological grease (MRG) has been utilized in magnetorheological (MR) brakes to generate a braking torque based on the current applied. However, the high initial viscosity of MRG has increased the off-state torque that led to the viscous drag of the brake. Therefore, in this study, the off-state viscosity of MRG can be reduced by the introduction of dilution oil as an additive. Three samples consist of pure MRG (MRG 1) and MRG with different types of dilution oil; hydraulic (MRG 2) and kerosene (MRG 3) were prepared by mixing grease and spherical carbonyl iron particles (CIP) using a mechanical stirrer. The rheological properties in the rotational mode were examined using a rheometer and the torque performances in MR brake were evaluated by changing the current of 0 A, 0.4 A, 0.8 A, and 1.2 A with fixed angular speed. The result shows that MRG 3 has the lowest viscosity which is almost 93% reduction while the viscosity of MRG 2 has lowered to 25%. However, the torque performances generated by MRG 3 were highest, 1.44 Nm, when 1.2 A of current was applied and followed by MRG 2 and MRG 1. This phenomenon indicated that the improvement of torque performances was dependent on the viscosity of MRG. By reducing the viscosity of MRG, the restriction on CIP to form chain formation has also decreased and strengthen the torque of MRG brake. Consequently, the utilization of dilution oil in MRG could be considered in MR brake in near future. Multidisciplinary Digital Publishing Institute (MDPI) 2022 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/34849/2/FULL%20TEXT.pdf text en https://eprints.ums.edu.my/id/eprint/34849/1/ABSTRACT.pdf Khairul Anwar Abdul Kadir and Nurhazimah Nazmi and Norzilawati Mohamad and Muhammad Kashfi Shabdin and Dimas Adiputra and Saiful Amri Mazlan and Nur Azmah Nordin and Shahir Mohd Yusuf and Ubaidillah (2022) Effect of Magnetorheological Grease’s Viscosity to the Torque Performance in Magnetorheological Brake. Materials, 15 (5717). pp. 1-19. ISSN 1996-1944 https://www.mdpi.com/1996-1944/15/16/5717/htm https://doi.org/10.3390/ma15165717 https://doi.org/10.3390/ma15165717 |
| spellingShingle | QC501-766 Electricity and magnetism Khairul Anwar Abdul Kadir Nurhazimah Nazmi Norzilawati Mohamad Muhammad Kashfi Shabdin Dimas Adiputra Saiful Amri Mazlan Nur Azmah Nordin Shahir Mohd Yusuf Ubaidillah Effect of Magnetorheological Grease’s Viscosity to the Torque Performance in Magnetorheological Brake |
| title | Effect of Magnetorheological Grease’s Viscosity to the Torque
Performance in Magnetorheological Brake |
| title_full | Effect of Magnetorheological Grease’s Viscosity to the Torque
Performance in Magnetorheological Brake |
| title_fullStr | Effect of Magnetorheological Grease’s Viscosity to the Torque
Performance in Magnetorheological Brake |
| title_full_unstemmed | Effect of Magnetorheological Grease’s Viscosity to the Torque
Performance in Magnetorheological Brake |
| title_short | Effect of Magnetorheological Grease’s Viscosity to the Torque
Performance in Magnetorheological Brake |
| title_sort | effect of magnetorheological grease’s viscosity to the torque
performance in magnetorheological brake |
| topic | QC501-766 Electricity and magnetism |
| url | https://eprints.ums.edu.my/id/eprint/34849/2/FULL%20TEXT.pdf https://eprints.ums.edu.my/id/eprint/34849/1/ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/34849/ https://www.mdpi.com/1996-1944/15/16/5717/htm https://doi.org/10.3390/ma15165717 https://doi.org/10.3390/ma15165717 |
| url_provider | http://eprints.ums.edu.my/ |