A rotor for an electric machine includes a rotor assembly having an outer surface and including a plurality of poles with permanent magnets. A solid layer is formed on the outer surface of the rotor assembly and has an outer surface with a first coefficient of friction that is lower than a second coefficient of friction of the outer surface of the rotor assembly. The rotor includes an outer sleeve. The rotor assembly is press-fit into the outer sleeve.

A rotor core has first and second magnet insertion holes along an outer circumference, and first and second slits along an inner circumference. The first and second slits have first and second facing portions facing each other. The first facing portion has a first inner end and a first outer end. The second facing portion has a second inner end and a second outer end. An inter-slit portion is provided between the first and second facing portions and is defined by a first straight line connecting the first and second inner ends and a second straight line connecting the first and second outer ends. In a radial direction of the rotor core, a minimum distance D1 from the inner circumference to the slits, a minimum width W1 of the slits, and a length W2 of the inter-slit portion satisfy at least one of D1<W1 and D1<W2.

An axial flux motor intended for fixing to a machine comprises a stator stack as well as a rotor installed to rotate with respect to the stator stack, which rotor determines the axis of rotation. The stator stack comprises sectional slots on the side intersecting the axis of rotation, preferably the sectional slots include radial sectional slots or are radial sectional slots and/or there are 6-12 of them. Into each respective sectional slot a fixing part can be installed, which at least in the direction of the axis of rotation shape-locks into the sectional slot in question. The axial flux motor can be fixed to the machine by fixing at least some of the fixing parts to the machine.

An electric motor including a stator body with a stator laminated core and a stator slot, wherein the stator slot has a slot wall with a slot wall insulation for electrical insulation, as well as at least one electrical conductor which is received by the stator slot, the slot wall insulation having a tooth-shaped configuration.

Mover for a transport apparatus in the beverage processing industry, the packaging industry, or the warehouse industry, where the mover can form a linear drive together with a guide rail and a long stator of the transport apparatus, and the mover comprises rolling mechanisms for moving along the guide rail, where the mover comprises a base body and one secondary part or two secondary parts, which, in the case of two secondary parts, are arranged on oppositely disposed sides of the base body and are suitable to interact with an electromagnetic field generated by the transport apparatus to drive the mover along the guide rail characterized in that the mover comprises a device for the continuously variable adjustment of the relative position of a secondary part relative to the base body.

In one embodiment, a high speed induction machine includes: a stator formed of a first plurality of laminations having a thickness of less than approximately 0.01 inch and a winding comprising a coil formed of Litz wire adapted about the stator; and a rotor adapted within the stator. The rotor may include: a rotor core formed of a second plurality of laminations having a second thickness of greater than approximately 0.10 inch and formed of high strength steel and sandwiched between a first end region including at least one first peripheral second lamination and a second end region including at least one second peripheral second lamination, the first end region having a first end ring retained by a first retaining ring adapted there around, the second end region having a second end ring retained by a second retaining ring adapted there around.

A motor rotor and a method for manufacturing a motor rotor, enabling crimping of the resolver rotor at low cost with less influence on the detection accuracy. A motor rotor includes a resolver rotor and a rotor shaft to which the resolver rotor is affixed by crimping. The rotor shaft includes a first stepped section with which a crimping punch makes contact to deform the first stepped section, a second stepped section with which an end surface of the resolver rotor makes contact, and a cutout groove formed in a surface which is located near the first stepped section and with which an inner peripheral hole section of the resolver rotor makes contact. In the crimping operation, the first stepped section of the rotor shaft is bent within the cutout groove to form a crimping protrusion which presses the end surface of the resolver rotor.

A rotary compressor including a cylindrical compressor housing provided with an inlet unit of a refrigerant and a discharging unit of the refrigerant, a compressing unit which is disposed inside the compressor housing and includes a cylinder and a piston for compressing the refrigerant sucked in from the inlet portion, a rotation shaft provided with the piston of the compressing unit, and a motor which includes a cylindrical stator and a rotor that is provided on another end side of the rotation shaft and that rotates inside the stator, and which drives the compressing unit via the rotation shaft, in which an outer circumferential portion of the stator includes a concave portion and is fixed to an inner circumferential portion of the compressor housing in a transition fit state, and in which the compressor housing includes a weld portion which is joined to the concave portion of the stator.

A bolt hole (24) penetrating in a direction of lamination of electrical steel sheets is opened in a core (10). The core (10) is fixed to a case (12) by means of a clamping bolt (14) inserted into the bolt hole. A flanged bush (32) is inserted into the bolt hole from an end face of the core into which the clamping bolt (14) is to be inserted. A tubular portion (34) of the flanged bush is inserted into the bolt hole so as to engage two or more electrical steel sheets. A portion of the bolt hole engaging with the tubular portion has a structure that blocks relative rotation. Rotational force generated by fastening the clamping bolt is dispersed into a plurality of electrical steel sheets and, as a result, force exerted on one electrical steel sheet becomes smaller, which in turn prevents deformation.

Provided is a method for mounting a stator core on a generator, the generator having key bars and spring bars disposed between the key bars and a frame body, the method including pre-laminating stator core sheets to form a stator core bundle in a given unit; conveying the stator core bundle laminated in the given unit; and mounting the stator core bundle on the inner peripheral surface of the frame body.