1[2]Schweitzer G,Bleuler H,Traxler A.Active Magnetic Bearings.Basics,properties and applications of active magnetic bearings[ J].Verlag der Fachvereine (vdf),ETH-Zurich (Swiss Federal Institute of Technology),Zurich,Switzerland,Aug,1994.
5[7]DelamareJ,RullereE,Yonnet J P.Classification and synthesis of permanent magnet bearing configurations[J].IEEE Transactions on Magnetics,1995,31 (6):4190-4192.
6[8]Earnshaw S.On the nature of molecular forces which regrlate the constitution of luminiferous ether[J].Trans Camb Phil Soc,1842.7.97-112.