Design and Analysis of a New Permanent Magnet Biased Integrated Radial-Axial Magnetic Bearing

A typical magnetic bearing system is composed of two radial magnetic bearings and an axial magnetic bearing. The axial magnetic. bearing with a large axial disk usually limits rotor dynamic performance and makes assembling and disassembling difficult Jar maintenance work. This paper proposes a novel permanent magnet biased integrated radial-axial magnetic bearing without axial disk. The axial magnetic hearing unit in this integrated magnetic bearing utilizes reluctance farces such that the axial disk can be removed from the bearing unit. The 4-pole homopolar type radial magnetic bearing unit is also designed and analyzed 3-D flux analysis is provided to illustrate the novel diskless integrated magnetic bearing.