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박철훈(C. H. Park),함상용(S. Y. Ham),홍두의(D. E. Hong),김준규(J. K. Kim) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
Most of spindles for machine tool are supported by ball bearings, and there are problems in the limits of high speed and high power as well as the cumbersome maintenance due to the short life time. In order to overcome these problems of the conventional spindles, the high speed spindle with magnetic bearings is developed in this study. Magnetic bearings for 60,000 rpm class high-speed spindle are designed, and high speed spindle with magnetic bearings are fabricated. Based on the running test up to 60,000 rpm, it is verified that the spindle is stably supported by the magnetic bearings, and the magnitude of the unbalance response at 60,000 rpm is less than 3 μm.