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https://ptsldigital.ukm.my/jspui/handle/123456789/457784Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Sallehuddin Mohamed Haris, Dr. | - |
| dc.contributor.author | Abdullah Al Faysal (P81881) | - |
| dc.date.accessioned | 2023-09-12T09:13:21Z | - |
| dc.date.available | 2023-09-12T09:13:21Z | - |
| dc.date.issued | 2019-11-18 | - |
| dc.identifier.other | ukmvital:122142 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/457784 | - |
| dc.description | In the past few decades, magnetic gears (MGs) and magnetically geared machines have evolved as a practical alternative to the existing mechanical gears. MGs offer significant advantages over mechanical gears, such as increased lifespan of the machine, reduced maintenance cost and reliable operation. However, most magnetic gearing concepts which are prevailing in today’s world are based on fixed gearing ratios. The fixed gearing nature of MG limits its use in those applications where variable gear ratios are desirable. This study concentrates on the design and fabrication of a prototype electromagnetic gear with changeable gear ratios. The proposed gear system is simulated using 3-D finite element analysis to determine the performance characteristics of the system. The performance of the developed prototype MG was then tested to conform to the simulation and theoretical results. The proposed system is based on the axial magnetic gear concept consisting of two rotary magnetic discs, and two stationary modulator discs placed in a linear pattern. The system is designed to operate on two different gear ratios (Gr) of Gr = 2:1 and Gr = 4:1 where each configuration consists of a combination of both rotary discs and either of the two stationary discs. The axial magnetic field design of the system enables interchangeability of the stationary modulator discs, depending on the activated gear ratio. Unlike other existing MG concepts, one rotary disc of the proposed system consists of electromagnets that allow the magnetic polarities to be changed to form different pole pair combinations, which ultimately results in changeable gear ratios. One high-performance slip ring is introduced into the system to enable electrical transmission over rotating shafts. Arduino is used to change the polarity of the electromagnets and to control other functions of the system. The developed MG in this study is able to change the gear ratio configuration in mid-operation. From the experimental tests and simulations, the relative rotational speed of the drive shaft and the driven shaft for different gear combinations was found to conform to the theoretical assumption. In the Gr = 4:1 configuration, the driven shaft velocity is 0.25 of the drive shaft and in the Gr = 2:1 configuration, the driven shaft velocity is 0.5 of the drive shaft.,Master of Science | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | - |
| dc.rights | UKM | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.subject | Gearing | - |
| dc.subject | Machine-tools -- Transmission devices | - |
| dc.subject | Electromagnetism | - |
| dc.title | Electromagnetic gear system with variable gear ratio | - |
| dc.type | theses | - |
| dc.format.pages | 83 | - |
| dc.identifier.callno | TJ184.F359 2019 3 tesis | - |
| dc.identifier.barcode | 005551(2021)(PL2) | - |
| Appears in Collections: | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_122142+SOURCE1+SOURCE1.0.PDF Restricted Access | 2.82 MB | Adobe PDF |  View/Open |
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