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dc.contributor.advisorNorum, Larsnb_NO
dc.contributor.authorZhang, Shujunnb_NO
dc.date.accessioned2014-12-19T13:53:16Z
dc.date.available2014-12-19T13:53:16Z
dc.date.created2012-10-01nb_NO
dc.date.issued2012nb_NO
dc.identifier558105nb_NO
dc.identifier.isbn978-82-3769-7nb_NO
dc.identifier.isbn978-82-471-3770-3nb_NO
dc.identifier.urihttp://hdl.handle.net/11250/257262
dc.description.abstractIt is clear that percussive drills are very promising since they can increase the rate of penetration in hard rock formations. Any small improvements on the percussive drills can make a big contribution to lowering the drilling costs since drilling a well for the oil & gas industry is very costly. This thesis presents a percussive drilling system mainly driven by a tubular reciprocating translational motion permanent magnet synchronous motor (RTPMSM), which efficiently converts electric energy to kinetic energy for crushing the hard rock since there is no mechanical media. The thesis starts from state-of-the-art of percussive drilling techniques, reciprocating translational motion motors, and self-sensing control of electric motors and its implementation issues. The following chapters present modeling the hard rock, modeling the drill, the design issues of the drill, the RTPMSM and its control. A single-phase RTPMSM prototype is tested for the hard rock drilling. The presented variable voltage variable frequency control is also validated on it. The space vector control and self-sensing control are also explored on a three-phase RTPMSM prototype. The results show that the percussive drill can be implemented to the hard rock drilling applications. A detailed summarization of contributions and future work is presented at the end of the thesis.nb_NO
dc.languageengnb_NO
dc.publisherNorwegian University of Science and Technologynb_NO
dc.relation.ispartofseriesDoktoravhandlinger ved NTNU, 1503-8181; 2012:233nb_NO
dc.subjectPercussive drill; Gas spring; Drilling application;Permanent magnet machineen_GB
dc.titlePercussive Drilling Application of Translational Motion Permanent Magnet Machinenb_NO
dc.typeDoctoral thesisnb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for informasjonsteknologi, matematikk og elektroteknikk, Institutt for elkraftteknikknb_NO
dc.description.degreePhD i elkraftteknikknb_NO
dc.description.degreePhD in Electric Power Engineeringen_GB


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