A coil segment forming apparatus includes a second bending section for bending a first bent body consisting of a pair of slot insertion portions that are substantially parallel to each other and a linking portion for connecting the pair of slot insertion portions formed in the same plane. The bending of the first bent body is carried out in a plane perpendicular to the aforementioned same plane. The second bending section has a plurality of pairs of press jigs arranged to oppose to each other in directions intersecting with the aforementioned same plane for pinching and pressing the linking portion, and a plurality of drive mechanisms for moving respectively the plurality of pairs of press jigs in directions intersecting with the aforementioned same plane based on moving amounts respectively set depending on forming conditions of the coil segment to be formed.

Method for forming at least one U-shaped winding element (10) for an electromagnetically excitable core (11) of an electric rotation machine (12), wherein the U-shaped winding element (10) has a first rod section (13) and a second rod section (15) which are connected by an arcuate connection section (16), wherein an inner tool part (23) having at least one recess (29) in the region of its outer circumference is provided, and an outer tool part (26) having at least one recess (30) in the region of its inner circumference is provided, and at least the U-shaped winding element (10) is inserted into the inner tool part (23) and the outer tool part (26) such that one rod section (13) is inserted into a recess (29) of the inner tool part (23), the other rod section (15) is inserted into a recess (30) of the outer tool part (26), and such that the inner tool part (23) and the outer tool part (26) are rotated with respect to one another about the axis of rotation (36), wherein in that context the at least two rod sections (13, 15) are moved away from one another, wherein, prior to the at least two rod sections (13, 15) being moved away from one another, a gripping element (50) having a tooth (53) is moved toward a rod section (15), which is gripped by means of a tooth (53).

A method for producing a stator for an electric machine includes providing a stator with an annular stator body, from which a plurality of stator teeth protrude radially inwardly, wherein an intermediate space is formed in each case between two stator teeth that are adjacent in a circumferential direction, encapsulating two stator teeth adjacent in the circumferential direction with a first plastic mass, arranging a stator winding on a stator tooth, fixing the stator winding on the stator tooth by encapsulating said stator winding with a second plastic mass, following the encapsulation with the first plastic mass and before the fixing of the stator winding, a first mask is introduced into the intermediate space between the two stator teeth, such that the volume of the intermediate space that is filled with the first mask remains free from the second plastic mass to form a cooling duct during the encapsulation.

In this armature, facing surfaces which are portions where a first segment conductor and a second segment conductor are joined together are disposed so as to overlap each other as viewed in a radial direction, and an end part of at least one of the first segment conductor and the second segment conductor is provided with chamfered parts at edge parts on both circumferential sides of the end part.

A stator assembly method by which coils are mounted on an annular stator core, each of the coils including a plurality of in-slot portions formed of a conductor and a coil end portion formed of the conductor, the stator core including slots that are formed between adjacent teeth extending radially inward from a back yoke and that accommodate the in-slot portions.

A stator for a rotating electrical machine, the stator including a tubular core having a plurality of slots; and a coil mounted in the core, wherein the coil includes a plurality of conductor wires aligned in the slots, each of the conductor wires has ends projecting beyond the slot, a pair of the ends are bonded together to form a bonded end, a plurality of the bonded ends are arranged next to each other in a circumferential direction of the core and are arranged in a radial pattern so as to extend in a radial direction of the core, and a cap is formed by molding using a resin material having electrical insulation properties so that the cap integrally covers adjacent ones of the plurality of bonded ends.

A method for producing a stator having a form-wound coil for use in a generator of a gearless wind power installation is provided. Circumferentially adjacent form-wound coils are inserted into slots of a stator in succession, where a predetermined number of the first form-wound coils to be inserted are being-inserted only partially into the slots or are positioned in front of the slots and are only fully inserted into the corresponding slots together with a predetermined number of the form-wound coils to be inserted last. A winding structure and a stator having the form-wound coil are provided.

The present invention relates to a direct current motor for a vehicle, the motor having a novel electromagnetic structure and exhibiting excellent driving efficiency. The direct current motor comprises: a cover assembly; a yoke assembly that has a housing coupled with the cover assembly and a plurality of excitation poles arranged within the housing; an armature assembly that includes an armature core having a plurality of pole teeth around which coils interacting with the excitation poles are wound and a commutator having, on the armature core, the same number of commutator films as the excitation poles; and a brush disposed inside the cover assembly and selectively making contact with the commutator as the armature assembly rotates, wherein the excitation poles are provided such that three N-poles and three S-poles are alternately arranged, and 13 pole teeth and 13 commutator films are radially formed with a predetermined angle therebetween.

A manufacturing method of a rotary electric machine is disclosed. The rotary electric machine includes a stator provided with a stator iron core, which is cylindrical and in which slots are formed in a circumferential direction on an inner circumferential surface, and coils of phases that are each inserted into the slots, and a movable element provided with a movable element iron core supported in a rotatable manner relative to the stator and at least a pair of movable element magnetic poles provided in the movable element iron core. The method includes: a split flux coil formation step; a coil setting step; a stator iron core setting step; and a split flux coil collective insertion step.

A stator may include a stator core and a coil. The stator core may include: a first portion; a second portion; and a first intermediate portion interposed between the first portion and the second portion in the axial direction. A first segment conductor and a second segment conductor may overly each other in a circumferential direction of the stator core hr a slot within an area of the first intermediate portion. A first side surface may include a first protrusion provided by the first intermediate portion protruding with respect to the first portion and the second portion. The first segment conductor and the second segment conductor may be held between the first protrusion and a second side surface such that the first, segment conductor and the second segment conductor are connected with each other.