Patent ID: 6225719
Filing Date: 2001-05-01
Classification: H02K

Abstract:
A long motor comprising:a rotor divided into sections with at least one low friction bearing arranged between the sections and in each end of the long motor, whereby a stator is stacked continuously past internal bearings, using thin sheets of metal discs in the area surrounding the bearings, and thin sheets of magnetic metal discs between the bearings wherein each single metal disc in the bearing pedestal is significantly thicker than the common stator metal discs and made of a paramagnetic metal with good heat transfer properties, that the inner diameter of each metal disc in the bearing pedestal is smaller than the inner diameter of the common stator metal discs, that the bearing is inserted in and held by a tight fit in the bearing pedestal, whereby the inner diameter of the bearing is fitting tightly to the axis of the rotor, and that slots for the stator windings in all the metal discs are radially open towards the rotor.