An active part of an electric machine includes electrical conductors which are additively printed in layers, and intermediate bodies respectively disposed between the electrical conductors and being additively printed in layers, wherein the electrical conductors are printed in a radially increasing manner, alternating with the intermediate bodies. A contact layer <=300 μm of a third material is applied between at least one of the electrical conductors and at least one of the printed intermediate bodies, with a diffusion zone being embodied by the contact layer and a heat treatment.

The rotor with a non-through shaft for a rotary electric machine comprises a cylindrical magnetic body clamped between two half-shafts, each comprising an attachment flange connected to the magnetic body, axial housings being uniformly provided in the magnetic body on at least one diameter of the magnetic body in order to house conductive bars. At least one attachment flange comprises insertion holes, each arranged facing a housing for inserting the conductive bars into the housings and the exterior diameter of the attachment flange is substantially equal to the exterior diameter of the magnetic body, the attachment flange comprising as many insertion holes as housings.

An active part of an electric machine includes electrical conductors which are additively printed in layers, and intermediate bodies respectively disposed between the electrical conductors and being additively printed in layers, wherein the electrical conductors are printed in a radially increasing manner, alternating with the intermediate bodies. A contact layer <=300 μm of a third material is applied between at least one of the electrical conductors and at least one of the printed intermediate bodies, with a diffusion zone being embodied by the contact layer and a heat treatment.

The rotor (4) for a squirrel-cage asynchronous rotating electrical machine comprises two compaction elements (6) clamping a cylindrical magnetic mass (7), short-circuit disks (8) inserted between the magnetic mass and the compaction elements, and conductive bars (9) housed in housings (10) of the magnetic mass and evenly distributed over at least one diameter of the magnetic mass, so that the short-circuit disks and the conductive bars form a squirrel-cage, at least one of the compaction elements and the short-circuit disks comprising insertion holes (Sa, 12) each disposed facing a housing. Retention means are inserted into each insertion hole to retain the conductive bars in the housings.

The rotor with a non-through shaft for a rotary electric machine comprises a cylindrical magnetic body clamped between two half-shafts, each comprising an attachment flange connected to the magnetic body, axial housings being uniformly provided in the magnetic body on at least one diameter of the magnetic body in order to house conductive bars. At least one attachment flange comprises insertion holes, each arranged facing a housing for inserting the conductive bars into the housings and the exterior diameter of the attachment flange is substantially equal to the exterior diameter of the magnetic body, the attachment flange comprising as many insertion holes as housings.

An electric motor includes a rotor and a squirrel cage winding. The squirrel cage winding has two rings, which are axially spaced apart from each other and are interconnected by bars. The rotor has cutouts axially extending all the way through for receiving bars, and the cutouts are spaced apart from each other in the circumferential direction. The rotor has radially outwardly open axial grooves, and the radial distance range covered by the axial grooves contains the radial distance range covered by the bars.

The invention relates to the field of electromechanics and can be used in asynchronous electric machines to improve their characteristics. The technical problem of the invention is the need to improve the traction and overload capacity and increase the starting torque of asynchronous electric machines. The rotor of an asynchronous electric machine contains a package of magnetic circuit plates with a straight, bevel-free, short-circuited rotor winding of the squirrel cage type, which contains short-circuited washers permanently mounted on both ends of it; in this case, the short-circuited winding of the rotor is made in two rows, in the form of internal and external rows, between which the magnetic core of the rotor is placed. The inner row of the short-circuited rotor winding is made in the form of a row of rods, or from a single solid sleeve of conductive non-magnetic material. The number of rods in one row of its squirrel cage-type short-circuited winding differs from the number of slots of the stator in a smaller direction by the number of pairs of poles of the electric machine. 1 n.s.p.f, 2 z.p.f, 5 FIG.

A rotor of an electric asynchronous machine including a shaft, a rotor core and short-circuit rings attached to end faces of the rotor core. The shaft has an outer lateral radial surface, a cavity extending axially, at least one passageway located on the lateral surface, and at least one channel connecting the cavity to the passageway. The rotor core has at least one channel extending therein. At least one of the short-circuit rings is composed of at least two ring-shaped disks interconnected to form a disk pack. At least one disk of at least one short-circuit ring has recesses arranged such that a channel structure is formed in the short-circuit ring and is in fluidic connection with at least one channel of the rotor core and fluidically connects the at least one passageway on the shaft lateral surface to at least one channel of the rotor core.

In a method for producing a short-circuit rotor of an asynchronous machine, a laminated core is formed with substantially axial slots and with an axial skew over an axial length of the laminated core, which axial skew is 0.3 to 3 times a slot pitch of the rotor. Conductor bars made of a first conductive material are inserted into the slots such that the conductor bars protrude out of end faces of the laminated core in a skewed manner out of the laminated core to define overhangs. At least the overhangs are coated with a galvanic layer of aluminum, tin or a solderable alloy to provide a lubricating layer. Individual laminations of a second conductive material are axially pressed onto the conductor bars such that the individual laminations short-circuit the conductor bars and form a short-circuit ring, which is composed of multiple individual laminations.