A distributed winding coil structure for automatic winding in a fractional slot three-phase AC motor has a stator in which the slot number 6N (N is a positive integer) of the slots positioned in the circumferential direction is greater than 1.5 times the pole number 2P (P is a positive integer), and the value obtained by dividing the slot number 6N by the pole number 2P is an irreducible fraction. Six coil groups are provided which include coils positioned in a wave winding inside a slot at a slot pitch of X or X+1, if the quotient obtained by dividing the slot number 6N by the pole number 2P is X (X is a positive integer), and each of the six coil groups is positioned so as to be offset by 60 degrees in the circumferential direction.

The invention relates to an electric asynchronous machine (1), in particular an induction machine, comprising:—a cylindrical stator (2) with stator teeth (22) on a stator yoke (21), wherein a ratio between a yoke height (hy1) of the stator yoke (21) in the radial direction and a groove height (hn1) of the stator grooves (23) in the radial direction ranges from 1.75 to 2.5;—a cylindrical rotor (4) with poles (42) on a rotor yoke which are defined by short-circuit windings in a rotor body (41), wherein a ratio between the yoke height of the rotor body (41) in the radial direction and the groove height of the rotor grooves in the radial direction ranges from 2 to 2.75.

There are provided first guide members inserted into the insides of the insulating members in the slots, second guide members inserted into the insides of the insulating members and onto outer sides relative to the first guide members in a radial direction in the slots, and a controller controlling movement of each of the first guide members and the second guide members. After the first guide member moves outward in the radial direction in the slot until coming into contact with or close to a second guide member, the plurality of second guide members are caused to sequentially move to an outer side of the stator core in the central axis direction in order with the second guide member closest to the first guide members first and retreat from the slot as the coil is moved outward in the radial direction by the pressers.

There are provided first guide members inserted into the insides of the insulating members in the slots, second guide members inserted into the insides of the insulating members and onto outer sides relative to the first guide members in a radial direction in the slots, and a controller controlling movement of each of the first guide members and the second guide members. After the first guide member moves outward in the radial direction in the slot until coming into contact with or close to a second guide member, the plurality of second guide members are caused to sequentially move to an outer side of the stator core in the central axis direction in order with the second guide member closest to the first guide members first and retreat from the slot as the coil is moved outward in the radial direction by the pressers.

The process utilizes a shaft (2) supporting the stator (1) and/or the rotor, respectively, and capable of rotating around its axis, a first (3) and a second (3′) working station allocated on an opposite position on the sides of the stator and/or the rotor, respectively, next to the outlet area of the lateral mouth of a cavity. Said stations have carrying devices (4, 4′) for the leading wire (f), clamps (5, 5′) capable of grasping and moving the tip of the wire (f), and sensors (6, 6′) for detecting the arrival of the extremity of the wire (f). The tip of the wire is at first introduced, by the clamp (5) of one station, inside the nearby carrier (4) and passes into the nearby cavity, and then exits until it is detected by the sensor (6′) of the other station, whereupon the tip of the wire is grasped by the other clamp (5′) and reintroduced into the second carrier (4′), as soon as the wire has exhausted its run inside the first cavity and the supporting shaft has, after rotating, positioned the subsequent cavity opposite the second carrier.

The process utilizes a shaft (2) supporting the stator (1) and/or the rotor, respectively, and capable of rotating around its axis, a first (3) and a second (3′) working station allocated on an opposite position on the sides of the stator and/or the rotor, respectively, next to the outlet area of the lateral mouth of a cavity. Said stations have carrying devices (4, 4′) for the leading wire (f), clamps (5, 5′) capable of grasping and moving the tip of the wire (f), and sensors (6, 6′) for detecting the arrival of the extremity of the wire (f). The tip of the wire is at first introduced, by the clamp (5) of one station, inside the nearby carrier (4) and passes into the nearby cavity, and then exits until it is detected by the sensor (6′) of the other station, whereupon the tip of the wire is grasped by the other clamp (5′) and reintroduced into the second carrier (4′), as soon as the wire has exhausted its run inside the first cavity and the supporting shaft has, after rotating, positioned the subsequent cavity opposite the second carrier.

An insulation wire includes a conductor, a first insulating layer formed in an outer surface of the conductor, and a second insulating layer formed in an outer surface of the first insulating layer. In the insulation wire, the first insulating layer is a thermoplastic resin layer that is made of polyphenylene sulfide or polyether ether ketone, and the second insulating layer is a thermosetting resin layer.

An insulation wire includes a conductor, a first insulating layer formed in an outer surface of the conductor, and a second insulating layer formed in an outer surface of the first insulating layer. In the insulation wire, the first insulating layer is a thermoplastic resin layer that is made of polyphenylene sulfide or polyether ether ketone, and the second insulating layer is a thermosetting resin layer.

The invention relates to a stator for an electric machine, comprising a plurality of rod conductors and a plurality of interconnection pieces. The interconnection pieces each have a curved shape, in particular the shape of a C, extending in the radial direction and about the axis of rotation of the stator; in order to form respective interconnection planes along the axis of rotation, each group of interconnection pieces is arranged in the region of at least one short end of the rod conductors of the associated group of rod conductors that are to be electrically connected. The invention further relates to a connection component and an electric machine.

The invention relates to a stator for an electric machine, comprising a plurality of rod conductors and a plurality of interconnection pieces. The interconnection pieces each have a curved shape, in particular the shape of a C, extending in the radial direction and about the axis of rotation of the stator; in order to form respective interconnection planes along the axis of rotation, each group of interconnection pieces is arranged in the region of at least one short end of the rod conductors of the associated group of rod conductors that are to be electrically connected. The invention further relates to a connection component and an electric machine.