A rotating electric machine includes: a stator core having a plurality of slots aligned along a circumferential direction; a stator having a stator coil with an enamel coating inserted into the slots of the stator core; and a rotor rotatably arranged over the stator core through a given gap. The stator coil includes: main coils of a plurality of phases in which a plurality of segment coils each having a rectangular cross-section wire formed into a substantially U-shaped wire in advance is connected to each other; a first sub-coil having a lead wire led from the slots and attached with an AC terminal, and connected to one end of the respective main coils; and a second sub-coil having a neutral wire led from the slots, and connected to the other end of the respective main coils. The lead wire and the neutral wire are each formed of a wire with a bend structure having a plurality of straights and bends.

A control apparatus is provided for controlling drive of a rotating electric machine that has coils of two or more phases. The control apparatus includes a first inverter to be connected with first ends of the coils, a second inverter to be connected with second ends of the coils, and a controller. The first inverter has a plurality of first switching elements each corresponding to one of the coils. The second inverter has a plurality of second switching elements each corresponding to one of the coils. The controller includes a first operation circuit configured to generate a first control signal for control of the first inverter and a second operation circuit configured to generate a second control signal for control of the second inverter. Moreover, the control apparatus is configured so that switching timings are synchronized, based on synchronization information, between the first and second inverters.

A stator for a simultaneous concentrated winding motor includes a core having 3m teeth, and 3m windings. The windings include at least a U1 winding and a U2 winding that belong to a U phase, a V1 winding and a V2 winding that belong to a V phase, and a W1 winding and a W2 winding that belong to a W phase. First lead wires of the U1 winding, the V1 winding, and the W1 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged. First lead wires of the U2 winding, the V2 winding, and the W2 winding extend, respectively, from the teeth on which the U1 winding, the V1 winding, and the W1 winding are arranged.

A stator-core-side expansive additive layer and a coil-side expansive additive layer include foam materials foaming by heating. A foam material included in the stator-core-side expansive additive layer has such a foaming characteristic that an increase characteristic of a foaming rate along with a temperature rise is shifted to a cold side relative to the increase characteristic of a foam material included in the coil-side expansive additive layer.

The invention relates to a coil former (1) for winding conductor wire (100) into coil windings (101), in particular for subsequent insertion in a stator carrier, said coil former having a coil former front (2) and a coil former rear (3), wherein the coil former front (2) and the coil former rear (3) span, by means of a peripheral surface (4), a spiral winding path (P) around a spiral axis (W) for the conductor wire (100), and wherein support elements (10, 11) are arranged along the winding path (P) and protrude beyond the peripheral surface (4) and laterally delimit the spiral winding path (P). The invention also relates to a winding device (50) having a coil former (1) of this kind and to a method for operating the winding device (50).

A stator assembling method where each of the plurality of the concentrically wound coils has vertexes oriented outward in a axial direction in the planned coil end portions, and a distance in the axial direction between the vertexes of the planned coil end portions on both sides in the axial direction of each of the plurality of concentrically wound coils is gradually reduced toward the conductive wire mounted on the inner diameter side of the stator core from the conductive wire mounted on the outer diameter side of the stator core.

A stator manufacturing method that includes a lead wire bending process of inserting a plurality of concentrically wound coils into slots, each of the concentrically wound coils being formed by winding a flat conductive wire for a plurality of turns, each of the slots being formed between every two adjacent teeth extending radially inward from an annular back yoke of a stator core, and bending lead wire portions of the inserted concentrically wound coils projecting in an axial direction from an end surface of the stator core, and a second bending process of bending the lead wire portions using the connection parts as fulcrums so that the lead wire portions approach the end surface of the stator core along the circumferential direction of the stator core after the first bending process.

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 winding arrangement method for a radial gap-type motor in which a three phase winding wound in a distributed winding form is inserted in slots of a stator includes: a coil forming step that, for each phase, forms a coil wound for each one pole pair; a coil group forming step that, for each phase, forms a first coil group by connecting odd-number-th coils along a direction of rotation via crossover wires, and forms a second coil group by connecting even-number-th coils along the direction of rotation via crossover wires; and a parallel-connecting step that, for each phase, connects the first coil group and the second coil group at one end, to form a current input side lead wire at the connection point, and connects the first coil group and the second coil group at the other end, to form a neutral point at the connection point.

A method of forming a stator winding including forming a first conductor having a first end, a second end, and a first plurality of end turns therebetween, the plurality of end turns having at least a first winding pitch, forming a second conductor having a first end portion, a second end portion, and a second plurality of end turns therebetween, the plurality of end turns having at least the first winding pitch, bending a first section of the first conductor at a select one of the plurality of end turns, overlaying the second conductor onto a second section of the first conductor, and unbending the first section of the first conductor such that a first portion of the second conductor is below the first section of the first conductor and a second portion of the second conductor is atop the second section of the first conductor forming a first conductor pair.