A method used for producing rotors and stators of electric motors, including the production of connection wires, and comprises the following steps: Winding the coil windings (12), which comprise a plurality of individual wires (14), on a wire winder (28) to which the individual wires (14) are fed from a wire supply unit (16) via a wire guide 18, 20, 22), Depositing the coil windings (12) in a draw-in tool (36), Drawing the coil windings (12) into grooves of a stator (84) or rotor body, Combining the individual wires (14) in phases by means of slide-on tubes (52) to produce the connection wires of the stator or rotor in question. In order to be able to automate the production of the connection ends, which was previously carried out manually, it is proposed that the individual wires (14) of each coil winding (12) are fastened to each other in the region of the wire guide (18, 20, 22) in order to form winding ends (46) and winding beginnings (32), after the winding and before or during the depositing, the winding ends (46) and winding beginnings (32) of each coil winding (12) are fastened in first position holders (42, 44) arranged in certain positions with respect to the draw-in tool, and during the drawing of the coil windings (12) into the stator or rotor, the winding ends (46) and winding beginnings (32) are transferred from the first position holders (42, 44) into second position holders (90, 92) arranged in certain positions with respect to the stator body (84) or rotor body. The present invention also relates to a device for carrying out the aforesaid method.

There are provided a coil unit, a stator member, a motor, and methods of manufacturing these, configured to achieve downsizing and simplified manufacturing steps. The coil unit includes a coil, and a bus bar including a connection end portion to which the coil is connected. One end of the coil and the connection end portion are welded by cold pressure welding with end faces of them being butted in a welded portion.

A machine that forms the heads of coils made of rectangular wire so that it fits within the slots of the stator of an electric machine. The machine receives a coil having unformed first and second heads separated by first and second legs and applies controlled deformation to yield properly shaped heads. The machine comprises first and second leg support mechanisms for gripping the first and second legs and head-forming elements mounted to the first and second leg support mechanisms for contacting portions of the heads of the coil while the first and second legs are gripped by the leg support. Actuators are provided for causing sequential actuated movements of one of the first and second legs to force the head-forming elements into contact with different portions of the first and second heads while allowing selective free movements of the other leg in response to the actuated movements.

A coreless electromagnetic machine includes a dual rotor and a stator. The dual rotor is adapted to rotate about an axis, and includes inner and outer rotor segments. The outer rotor segment is spaced radially outward from, and axially aligned to, the inner rotor segment. The inner and outer rotor segments radially define an annular chamber. The stator is disposed, at least in-part, in the annular chamber.

A rotating electric machine having a fraction slot configuration in which the number of slots per pole per phase is not an integer includes: a stator that includes a stator core provided with a plurality of slots, and a stator winding having a plurality of coil sides accommodated in the plurality of slots and a plurality of coil ends connecting the same side end parts of the plurality of coil sides to each other; and a movable element that is supported to be movable with respect to the stator, and includes a movable element core, and a plurality of movable element magnetic poles provided in the movable element core. The stator winding includes a plurality of basic coils in which the magnitude of magnetomotive force generated by the plurality of coil sides forming the one-phase band is uniform in each of the plurality of movable element magnetic poles.

A coil is a coil of a conductive wire that has a quadrangular cross section, that is spirally wound and laminated to have a series of turns including first to n-th turns (n is an integer of 3 or more), and that is provided, on at least some of the first to n-th turns in the coil, with deformed portions representing recesses each having a shape different from a shape of another portion of the conductive wire. In each of the first and n-th turns respectively lying at both ends of the series of turns, an outer surface lying on a side opposite to a center of the series of turns extends flush along with a plane intersecting the series of turns.

A stator, wherein the coil unit includes a coil end portion projecting from an axial end face of the stator core; the coil end portion includes a plurality of peak portions projecting axially outward and arranged in a circumferential direction, and a plurality of lead wire portions for supplying electric power to the coils; and each of the lead wire portions includes an extension portion extending at least in an axial direction, and a bent portion that is bent at least from the axial direction to a radial direction, at least a part of the bent portion being disposed on a stator core side with respect to the peak portions in the axial direction, in a space between the peak portions that are closest to the extension portion in the radial direction and that are adjacent in the circumferential direction.

The invention relates to a method for producing stranded wires, including the steps of applying an insulation layer to lines, separating the insulated lines, individually removing the insulation layer from the separated lines along a partial length of the lines, and bringing the lines together to form a stranded wire, wherein the partial lengths are arranged at the same level at least in sections for the purpose of forming a non-insulated contact region.

A winding apparatus 23 forms a rectangle-tubular edgewise coil 1 by alternately repeating bending of a rectangular conductor 2 in a clockwise direction in a plan view in an edgewise manner and feeding of the rectangular conductor 2. The winding apparatus 23 includes a bending jig 31 configured to bend the rectangular conductor 2, five sway-prevention guides 50 arranged at regular intervals on the same circumference to prevent the edgewise coil 1 from losing its shape, the five sway-prevention guides 50 being configured so that when the rectangular conductor 2 is bent in the edgewise manner, the edgewise coil 1 is sandwiched between two adjacent ones of the five sway-prevention guides 50 in the clockwise direction, and a guide holding member 51 configured to be rotationally driven in synchronization with the bending of the rectangular conductor 2 in the edgewise manner and the feeding of the rectangular conductor 2.

The present invention is a coreless coil characterized in that a plurality of -winding coils are formed by a first coil layer and a second coil layer that has a same shape and a same width as the first coil, each coil layer having a center opening, being laminated together. Each outer peripheral portion in a connection direction of the plurality of -winding coils has a connection stepped portion that is point-symmetric in relation to a center axis line of a Z-axis (the Z-axis being an axis that, in relation to an X-axis that is a center of both connected end portions of the -winding coil and passes through a lamination boundary line of the first coil layer and the second coil layer, is a center of both unconnected end portions of the -winding coil and passes through the lamination boundary surface such as to be orthogonal to the X-axis) of the respective center opening. The plurality of -winding coils are connected in an annular shape in a state in which the connection stepped portions overlap each other and are attached to each other. An object of the present invention is to improve the bonding force of the plurality of -winding coils.