Abstract: A dynamoelectric machine wherein rotor cooling is effected by cooling channels located in the stator structure.

Abstract: A method for making a stator for an electric machine which is simple, relatively inexpensive and permits mass production of motors having excellent operating characteristics including accurate centering of the rotor for silent and vibration-free function and efficient cooling of the windings and bearings. The method consists of the steps of supporting casings in a position surrounding the winding heads in sealing relation with opposite ends of a lamination stack, positioning a mandrel in the stator cavity having locating means engageable with the stator stack and means on its outer surface to define axial and radial locating positions for bearing shields. The casings, laminations and mandrel define a pair of enclosed cavities at opposite ends of the stator stack. A curable molding material is injected into the cavities by means of centrifugal force and thereafter the molding material is cured to complete the stator assembly.

Abstract: A mount for a bearing comprising a hub portion having a cylindrical surface defining a seat of a predetermined diametral dimension to firmly support a race ring of the bearing. The mount is made of a molding material having a different longitudinal expansion coefficient than the bearing ring and a spiral cast in the molding material and made of a material having the same longitudinal expansion coefficient as the bearing ring. The spiral is mounted in a predetermined position so that at least a portion thereof forms the surface defining the seat. In the preferred embodiment, the spiral is in direct contact with the bearing ring.

Abstract: An electric machine comprising a stator and a rotor. The stator consists of two sections made of a mouldable plastic material wherein at least the means providing the magnetic flux is formed integrally with the stator sections. The assembly further includes means securing the stator sections in position circumscribing the rotor.

Abstract: A method for making a stator for electric motors comprised of a plurality of laminations arranged with their sides in the direction of the rotor axis wherein the edge portions of the laminations running in the axial direction are bent upwardly towards the stator bore and maintained in spaced apart relation at a predetermined position and permanently fixed in that position solely by means of a moulding compound. Each lamination stack consists of undivided laminations comprising a north and a south pole wherein each main pole consists of the lamination edges of the two adjacent stacks.

Abstract: A stator for electric motors including a rotor and consisting of at least a pair of stacks each comprised of a plurality of laminations arranged with their sides in the direction of the rotor axis, the edge portions of the laminations running in the axial direction being bent inwardly towards the stator bore and maintained in spaced-apart relation at a position predetermined with regard to the magnetic flux lines and being permanently fixed in this position solely by means of a moulded compound, each lamination stack consisting of undivided laminations comprising a north and a south pole, each main pole consisting of the lamination edges of two adjacent lamination stacks.

Abstract: A method of manufacturing rotating electric machines comprising a stator and a rotor consisting of the steps of forming the stator in at least two sections by permanently moulding in a plastic mass at least the means providing the magnetic flux, positioning the stator sections to circumscribe the rotor and thereafter securing the stator sections in a fixed position relative to one another.