A rotor, a corresponding electric machine, a manufacturing method and a corresponding motor vehicle are disclosed. The rotor has a cavity structure in a first winding head supporting structure and a cut-out in a second winding head supporting structure which are connected by way of feed and return lines for a coolant. Here, the cavity structure has an inflow region, into which a coolant guide of a rotor shaft opens, and a return region which is separate from the inflow region. In this way, the rotor is configured for liquid cooling of the winding head supporting structure.

A method for manufacturing a stator for a rotating electrical machine by placing coils in a stator core, wherein each of a plurality of teeth formed in a radial pattern in an inner periphery of an annular yoke portion in the stator core has tip-end parallel side surfaces formed in its tip end portion having a constant width in a circumferential direction, has intermediate tilted side surfaces continuous with the tip-end parallel side surfaces and formed in its portion whose width in the circumferential direction increases closer to an outer periphery, and has base-end parallel side surfaces continuous with the intermediate tilted side surfaces and formed in its base end portion having a constant width in the circumferential direction.

A method for manufacturing a stator that includes attaching a coil portion to slots by pivoting the coil portion about a connecting wire in a state in which a plurality of the coil portions are connected together by the connecting wire for each phase, the coil portions including a first coil portion that includes one first slot-housed portion to be arranged on a radially inner side of a first slot of a stator core and the other first slot-housed portion to be arranged on a radially outer side of a second slot provided at a position spaced away from the first slot in a circumferential direction, the other first slot-housed portion being spaced away from the one first slot-housed portion in the circumferential direction.

A stator manufacturing apparatus includes: an insert piece having such a stepped structure that a width of the insert piece increases along a winding axis direction of a coil from a side to be fitted into the coil, fitted into the coil, configured to maintain an inside width of the coil; and an insert piece driving unit configured to move the insert piece along the winding axis direction of the coil.

An electromagnetic armature comprising an electromagnetic yoke having a cylindrical surface of axis z, intended to be facing an air-gap. Said cylindrical surface is the interaction surface and comprises a plurality of teeth forming poles, associated with the interaction surface and projecting from same, and disposed at regularly spaced intervals around the whole yoke. Each tooth comprises a recess arranged on one of the faces of the tooth in a so-called polar plane. Each recess is intended to receive the winding. Said teeth are disposed on the yoke in such a way that the recesses are disposed alternately to either side of the polar plane. Alternatively, one or more teeth of the armature can be removed from the yoke.

A rotor of an asynchronous machine with a cage rotor includes a laminated core formed from a plurality of partial laminated cores. The laminated core has substantially axially extending conductors arranged in slots in the laminated core. The conductors include at least two materials of different electrical conductivities, such that a material with a higher electrical conductivity surrounds a material with a lower electrical conductivity by at least 65% in a circumferential direction.

Disclosed is a stator assembly. By means of the process steps, such as unit body winding, multi-unit preparation, winding assembly and stator embedding, that are sequentially implemented, winding of a single unit body can be achieved by means of a single flat wire, winding of a stator winding can be completed merely by means of a bending process in a whole unit body structure.

The method for removing a bar or coil from a slot of an electric machine includes weakening the bonding between the slot and the bar or coil, and then removing the bar or coil.

A method for producing a formed coil winding includes providing a main body having a plurality of slots distributed across the circumference for arranging layered coils; providing at least one layered coil having a first coil side and a second coil side; arranging the first coil side in a slot in the main body, wherein the layered coil forms a projection at each of the two ends of the main body; form-fittingly and/or frictionally holding the first coil side in an exit region from the slot for holding the first coil side in the slot in a rotationally fixed manner; twisting the coil sides relative to one another in a circumferential direction until the second coil side is aligned with another slot in the main body; and radially shifting the second coil side for arrangement in the other slot.

A rotor for an electric machine includes a rotor shaft and a laminated core which is arranged on the rotor shaft and formed from stacked electrical laminations and which has radially outwardly projecting laminated core protrusions. Rotor windings are each wound around a laminated core protrusion. A pole separator is arranged between two adjacent laminated core protrusions and has a cooling duct, which runs in the pole separator, for a coolant.