Patent ID: 6465924
Filing Date: 2002-10-15
Classification: F04D,F16C

Abstract:
A magnetic bearing device having magnetic bearings including an active magnetic bearing for rotatably supporting a rotor shaft that is rotationally driven by a motor having a stator coil, comprising:a cylindrical stator column; an electromagnet module comprising a first cylindrical holding member, an electromagnet of the active magnetic bearing attached to an inner peripheral surface of the first cylindrical holding member, and a displacement sensor for the electromagnet attached to the inner peripheral surface of the first cylindrical holding member, the electromagnet and the displacement sensor being coated with a resin; and a stator coil module comprising a second cylindrical holding member and the stator coil attached to an inner peripheral surface of the second cylindrical holding member, the stator coil being coated with a resin; wherein the electromagnet module and the stator coil module are slidably inserted and removably engaged in the cylindrical stator column and the respective modules are formed with a given tolerance such that thermal expansion thereof does not impede operation of the bearing device.