TY - JOUR
AU - Yoo, S.Y.
AU - Kim, W.Y.
AU - Kim, S.J.
AU - Lee, W.R.
AU - Bae, Y.C.
AU - Noh, M.
DA - 2011/04
UR - https://pubs.kist.re.kr/handle/201004/130470
AB - In this paper, we describe a process for optimally designing a ring-type permanent magnet thrust bearing. The bearing consists of two sets of permanent magnet rings. One set is located inside the other set An axial offset between the two sets creates axial force, which results in a thrust bearing function. In order to realize an optimal design of the bearing where the required load capacity of the bearing is achieved with the least magnet volume, we derived analytical design equations by adopting the equivalent current sheet (ECS) method We considered the following two types of magnet anays: axial arrays and Halbach arrays. These two types of arrays are optimized using the analytical design equations. The results of the optimization are verified using three dimensional (3D) finite element analyses (FEA). The results show that the Halbach array can achieve the required load capacity with less amount of permanent magnet than the axial array does. The efficacy of the ECS method is also verified by using 3D FEA. It is found that die accuracy of ECS method is more sensitive to the underlying assumptions for the Halbach array than for the axial array. ？ 2011 The Korean Society of Mechanical Engineers.
LA - Korean
KW - Analytical design
KW - Axial forces
KW - Equivalent currents
KW - Halbach array
KW - Load capacity
KW - Magnet volume
KW - Optimal design
KW - Passive magnetic bearing
KW - Three dimensional (3D) finite element analysis
KW - Thrust bearing functions
KW - Bearing capacity
KW - Bearings (structural)
KW - Design
KW - Magnetic bearings
KW - Magnetic levitation
KW - Magnetic levitation vehicles
KW - Optimal systems
KW - Optimization
KW - Permanent magnets
KW - Three dimensional
KW - Thrust bearings
TI - Optimal design of permanent magnet thrust bearings
DO - 10.3795/KSME-A.2011.35.4.353
ER -