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High-Speed Applications for Electromagnetic Propulsion Technology

Mahmoud, Hany Mostafa Mohamed Elsaid (2018) High-Speed Applications for Electromagnetic Propulsion Technology. PhD thesis, University of Sheffield.

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Thesis_Final_Hany M. Mohamed Elsaid Mahmoud.pdf
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In this thesis, different types of the magnetic lead screw systems are considered, and the effects of the key design parameters, such as magnet thickness, air-gap length, pole-pitch, number of pole-pairs, dimension etc. on the force/torque transmission are investigated. Moreover, research into the realisation of helical magnetisation distribution employing a novel impulse magnetisation process is undertaken, in order to reduce the complexity and cost of manufacture. This avoids the complex and/or time-consuming methods, which may require the assembly of a large number of small magnets to approximate helical magnetisation distribution. A prototype reluctance type magnetic screw system is realised, it consists of a double start mechanical screw and a permanent magnet nut equipped with impulse magnetised cylindrical permanent magnets, using purpose designed double-sided impulse magnetising fixture. Furthermore, a test-rig to measure the transmitted force is developed and used to compare the predicted and measured results.

Item Type: Thesis (PhD)
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Electronic and Electrical Engineering (Sheffield)
Depositing User: Mr Hany Mahmoud
Date Deposited: 20 Sep 2018 12:31
Last Modified: 20 Sep 2018 12:31
URI: http://etheses.whiterose.ac.uk/id/eprint/21373

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