The motor/motorized spindle includes a stator and a rotor, and the rotor is supported on the end cover through magnetic bearings at both ends. The improvement is that the rotor is also provided with a rolling bearing, and the fit clearance between the outer ring of the rolling bearing and the end cover is smaller than the magnetic suspension clearance. When working, under normal load, the stator is in magnetic levitation state, with almost no friction, stable operation and no noise. When the load is heavy or disturbed, the load acts on the rolling bearing, thus avoiding the bearing damage of the magnetic suspension shaft. The utility model has a simple and reasonable structure, and obviously improves the bearing capacity and adaptability of the magnetic bearing under the condition of limited cost increase.
Magnetic bearing motor uses radial and axial magnets installed on the base to induce a magnetic field in the rotating rotor, and suspends the rotating rotor through the interaction of stator and rotor magnetic fields, thus avoiding the mechanical problems caused by the contact friction between the rotating shaft of the traditional motor and the bearing, and making the motor speed not limited by the bearing. Thanks, landlord