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.

Provided are embodiments for a power generation system. The system includes a generator comprising a first set of stator windings and a second set of stator windings; a first rectifier coupled to an output of the first set of stator windings; a second rectifier coupled to an output of the second set of stator windings; and an electrical connection coupling an output of the first rectifier and an output of the second rectifier, wherein the electrical connection is used to provide a DC supply to a load. Also provided are embodiments for a method for operating the power generation system.

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.

An electric work machine includes: a brushless motor including: a rotor having permanent magnets fixed to a rotor core; a stator core; one or more insulators fixed to the stator core; and a stator including coils mounted on the insulator(s); magnetic sensors, which detect the position of the rotor in a rotational direction by detecting the magnetic flux of the permanent magnets; a controller, which controls energization of the coils based in part on detection signals of the magnetic sensors; and an output part driven by the rotor. The permanent magnets are each a neodymium, sintered, plate magnet. The pole count (N) is the number of permanent magnets. The stator diameter (x) is the diameter of a surface of the stator core that faces the rotor in millimeters. The following condition is satisfied: 0.16x+2.5<N<0.23x+3.6.

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.

A stator for an electric axial flux machine, more particularly a stator for an axial flux machine designed as a prime mover for an electrically driven motor vehicle, which stator includes a stator body with a plurality of stator teeth distributed around the circumference and stator windings. At least one of the wound stator teeth is split, seen in the radial direction, into at least two stator part teeth, wherein the at least two stator part teeth are wound with a different number of turns of the stator winding.

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.

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.

A motor includes a stator having a winding, and a rotor. The rotor rotates by receiving a rotational magnetic field generated by drive current supplied to the winding. The winding includes a first winding and a second winding, the first and second windings both being excited at the same timing by the drive current. The first winding and the second winding are connected in series. The rotor includes a first pole section and a second pole section. The second pole section faces the second winding at the rotation position of the rotor at which the first pole section faces the first winding. The magnetic force exerted on the stator by the second pole section is weaker than that exerted by the first pole section.