Abstract: A stator for an electric induction motor includes a packet of stacked laminations with slots housing the substantially rectilinear parts of the winding turns and in which the end winding parts are encapsulated at each of the stator in an insulating housing structure that is respectively closed at the end of the stator laminations close to the air gap and at the outside of the yoke of the stator magnetic circuit, one of the said insulating housings being open over the whole air gap section in order to receive the rotor and being flanged onto one of the rotor supports while the other of said housing structures includes an abutment flange supporting the stator against a rotor bearing, the stator being employed in motors in which the rotor is held in position by an air gap tube and where the stator can be introduced in a removable manner onto a rotor subassembly.

Abstract: The invention concerns the stator of an electric motor comprising a packet a stacked laminations provided with laterally open slots for receiving the active portions of the windings for the motor poles in which the surface of each slot carries an inner layer of a molded insulating material applied to the insulation surface of the slot, the layer in each slot being united with the layer of each one of the adjoining slots at the two outer sides of the stator by means of an insulating lateral layer so that the combiantion of the layers forms a one-piece molded layer over the slot region, thus providing good insulation of the magnetic circuit in electric motors designed to have a long service life at elevated temperatures such as those used for central heating circulation pumps.