A stator includes a stator core and a stator winding. An inner wall of the stator core is provided with M winding slots, the M winding slots are uniformly disposed in a circumferential direction of the inner wall of the stator core. The stator winding includes flat wire conductors inserted in the winding slots, N layers of flat wire conductors are disposed in any one of the winding slots, and phase units of a first-phase winding, phase units of a second-phase winding, and phase units of a third-phase winding are sequentially and periodically arranged along the inner wall of the stator core. Each phase winding includes P parallel branches. Any one of the parallel branches connects flat wire conductors of M.Math.N/3P layers.

An exciter comprises a stator armature defining a plurality of circumferentially spaced apart winding slots separated by respective stator teeth. first exciter winding with multiple phases, a second exciter winding with multiple phases. The individual windings of the first and second exciter windings are seated in the winding slots. For each phase of each of the first and second exciter windings there are two leads configured to connect to a generator control unit (GCU).

An exciter comprises a stator armature defining a plurality of circumferentially spaced apart winding slots separated by respective stator teeth. first exciter winding with multiple phases, a second exciter winding with multiple phases. The individual windings of the first and second exciter windings are seated in the winding slots. For each phase of each of the first and second exciter windings there are two leads configured to connect to a generator control unit (GCU).

A motor including: a magnet; a plurality of slots opposing the magnet; coils, the coil extending over and being wound around two slots of the plurality of slots; a commutator including a plurality of segments; and a plurality of brushes including contact portions in contact with the plurality of segments in a circumferential direction, wherein a winding direction of the coil around one slot of the two slots wound around with the coil with the coil extending over the two slots is opposite to a winding direction of the coil around the other slot, and, in the circumferential direction, the coil wound around the one slot is connected to one segment of two adjacent segments of the plurality of segments, and the coil wound around the other slot is connected to the other segment of the two adjacent segments.

A motor including: a magnet; a plurality of slots opposing the magnet; coils, the coil extending over and being wound around two slots of the plurality of slots; a commutator including a plurality of segments; and a plurality of brushes including contact portions in contact with the plurality of segments in a circumferential direction, wherein a winding direction of the coil around one slot of the two slots wound around with the coil with the coil extending over the two slots is opposite to a winding direction of the coil around the other slot, and, in the circumferential direction, the coil wound around the one slot is connected to one segment of two adjacent segments of the plurality of segments, and the coil wound around the other slot is connected to the other segment of the two adjacent segments.

Presented are oleophilic surface treatments for electric machines, methods for making/using such electric machines, and vehicles employing traction motors having stator windings with oleophilic treatments on select surfaces. An electric machine includes an outer housing with a direct-cooling thermal management system fluidly connected to the housing to circulate thereto a coolant fluid. A stator assembly, which is attached to the housing, includes a stator core with one or more electromagnetic windings mounted to the stator core. A rotor assembly is movably mounted to the hosing adjacent the stator assembly. The rotor assembly includes a rotor core with one or more magnets mounted to the rotor core spaced, e.g., across an air gap, from the winding(s). Select components of the stator assembly have a target surface with an oleophilic surface treatment that enlarges the target surface's wetted area and increases a coolant mass of the coolant fluid contacting the target surface.

In an open and close finger device, fingers are arranged to guide coil wires when the coil wires are respectively inserted into slots in a motor core. A cam plate includes cam slots, each of which is engaged with a cam follower which is fixed to corresponding one of the fingers. When the cam plate is turned, the fingers are advanced along a radial direction while being guided within guide grooves in a finger guide. The cam plate is turned while being guided via a bearing by a cap fixed to the finger guide.

In an open and close finger device, fingers are arranged to guide coil wires when the coil wires are respectively inserted into slots in a motor core. A cam plate includes cam slots, each of which is engaged with a cam follower which is fixed to corresponding one of the fingers. When the cam plate is turned, the fingers are advanced along a radial direction while being guided within guide grooves in a finger guide. The cam plate is turned while being guided via a bearing by a cap fixed to the finger guide.

An axial flux motor includes a housing; a drive shaft disposed within the housing; at least one rotor; and at least one stator. The at least one rotor includes a diametrically-magnetized single pole pair magnetic ring having a rotor aperture defined through the center of the magnetic ring, where the drive shaft extends through the rotor aperture and where the at least one rotor is fixed to the drive shaft. The at least one stator includes a number of conductive windings and a stator aperture, where the drive shaft extends through the stator aperture and where the drive shaft is rotatable within the aperture. The at least one stator is configured to generate an axial magnetic field that causes the at least one rotor to rotate, thereby rotating the drive shaft.

An object of the present invention is to suppress variations in an angle of a shoulder part of a segment coil to improve easiness in inserting segment coils in a stator core.

A stator of an electric motor according to the present invention includes a stator core 12 in which a plurality of slots 12a are formed, and a plurality of segment coils 11 of U shapes inserted respectively in the plurality of slots 12a.

The segment coil 11 includes a shoulder part 11a and a shoulder part 11b that are bent to form a U shape. In a front view of the U shape, a press mark 100a is formed on the shoulder part 11a and on the shoulder part 11b, the press mark being a dent sinking in a front-to-rear direction, from a front surface of the shoulder part 11a and from a front surface of the shoulder part 11b. The press mark 100a is formed also on a back surface of the shoulder part 11a and on a back surface of the shoulder part 11b.