Browsing NTNU Open by Author "Bekken, Rune Seglem"
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Experimental testing of a tubular linear permanent magnetic machine for percussion drilling in hard rocks
Bekken, Rune Seglem (Master thesis, 2011)A Tubular Linear Permanent Magnetic Machine (TLPMM) performing percussion drilling, with percussion rates ranging from 20-71 Hz has been studied experimentally. It produces an oscillating motion when electrical power is ...