Blar i Institutt for elkraftteknikk på emneord "Percussive drill; Gas spring; Drilling application;Permanent magnet machine"
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Percussive Drilling Application of Translational Motion Permanent Magnet Machine
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:233, Doctoral thesis, 2012)It 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 ...