A rotor assembly for an electric machine includes a core having at least one post and a cap wherein electrical windings are wound about the rotor assembly to define a pole. The rotation of the rotor and rotor pole relative to a stator generates a current supplied from the electric machine to a power consuming device.

A method for producing a rotor includes providing lamella elements and arranging the lamella elements to form a lamella bundle where the lamella bundle has webs. End plates are arranged at respective end faces of the lamella bundle where the end plates axially support the lamella bundle. The lamella bundle is axially fixed or pretensioned by winding conductor material around the webs and a rotor shaft is arranged in the fixed or pretensioned lamella bundle.

Disclosed in an embodiment are a rotor assembly and a motor including the same, the rotor assembly including: a rotor part; and a first cover including a first fixing plate for covering one side of the rotor part and a plurality of first vane parts protruding from the first fixing plate, wherein a first angle, which is formed by an imaginary line extending from an outer end of each of the first vane parts and a tangential line of a first imaginary circle, is greater than a second angle formed by an imaginary line extending from an inner end of each of the first vane parts and a tangential line of a second imaginary circle, centers of the first imaginary circle and the second imaginary circle are the same as a center of the first fixing plate, the tangential line of the first imaginary circle is a tangential line at a position at which the first imaginary circle and the outer end meet and the tangential line of the second imaginary circle is a tangential line at a position at which the second imaginary circle and the inner end meet.

A rotor for an electric machine includes a rotor main body which has at least two poles between which in the circumferential direction of the rotor is disposed at least one pole gap, and a rotor shaft which is coupled in a rotationally fixed manner to the rotor main body. The rotor has a support device which has a covering body that is configured for covering at least regions of an end side of the rotor main body. The support device has an annular body, which is different from the covering body, and in the direction of radial extent of the rotor is braced in relation to the rotor main body, on the one hand, and in the direction of radial extent of the rotor is braced in relation to the covering body, on the other hand.

A wound field rotor includes a shaft having an outer surface, an inner surface defining a flow path, and an opening defining a passage extending from the flow path through the outer surface. A plurality of laminations is mounted to the outer surface. The plurality of laminations includes an inner annular surface disposed on the shaft and an outer annular surface defining a plurality of rotor teeth. A plurality of field windings is disposed about corresponding ones of the plurality of rotor teeth. A first portion of the plurality of rotor laminations includes a first passage portion that extends from the inner annular surface radially outwardly and is fluidically connected to the passage, and a second portion of the plurality or rotor laminations adjacent the first portion includes a second passage portion that includes a first end that registers with the first passage portion and a second end.

A wedge for use in an electric machine includes a central portion comprising at least a first material, a first wing integrally attached to the central portion, and a second wing integrally attached to the central portion opposite the first wing, wherein the first wing, and the second wing include a second material.

Homopolar linear synchronous machines (200) are provided herein that include a mover device (111). The mover device (111) includes a cold plate with ferromagnetic cores extending through slots in the cold plate. Layers of armature coils are located around the ferromagnetic cores on opposite sides of the cold plate. The mover device (111) further includes at least one field coil.

Disclosed is a motor, the motor according to an exemplary embodiment of the present disclosure including a stator arranged at an inner surface of a housing and including a magnet, a rotor core centrally arranged at the stator to pass through a rotation shaft, a rotor including an insulator covering the rotor core and a coil wound on the insulator, a commutator coupled to the rotation shaft to be electrically connected to the coil, and a brush coupled to the housing to be closely contacted to the commutator, wherein the insulator is formed with a short-circuit prevention unit formed on a drop path of conductive particles in order to prevent the short-circuit between the rotor core and the commutator from being generated by the conductive particles generated by the commutator and the brush.

A rotary electric machine including a rotor having salient poles, each salient pole comprising a pole body surrounded by at least one coil, and at least one pair of wedges comprising a first wedge positioned against the coil of a first salient pole and a second wedge positioned against the coil of a second salient pole consecutive with the first. The first and second wedges are able to move in the inter-pole space with respect to one another along the longitudinal axis of the rotor, and each having at least one contact surface, the contact surface or surfaces of the first wedge being configured to come into contact with the contact surface or surfaces of the second wedge as one wedge is moved longitudinally with respect to the other in such a way that the movement of one wedge with respect to the other induces a pressing of these wedges against the coils so as to hold the coils of the first and second salient poles respectively against the pole bodies of the first and second salient poles.

A rotor for a rotating electric machine includes a plurality of pole teeth supporting an excitation winding, grooves respectively formed between the pole teeth, and wedges provided in the grooves, each wedge having a concave shape with a bulge oriented towards the inside of the rotor.