An apparatus for manufacturing a stator includes a placement table, a supporting member and a resistance heating device. The placement table is configured to have a stator core, which has coil segments and insulators inserted in slots thereof, placed thereon. The stator core is formed of steel sheets that are laminated in an axial direction of the stator core. The coil segments together form a stator coil. The insulators are formed of a material that is foamable upon being heated. The supporting member is configured to support, in the axial direction of the stator core, distal end portions of teeth of the stator core so as to prevent gaps from being formed between the steel sheets forming the stator core. The resistance heating device is configured to heat, through energization of the stator coil, the insulators along with the stator coil and thereby cause the insulators to foam.

A coil insertion device includes coil diameter expanders, the coil diameter expanders being configured to insert a coil assembly in a wound state into slots of a stator core by expanding the coil assembly in diameter from inside of the stator core, each of the coil diameter expanders includes: a coil presser that is arranged inside the coil assembly and presses coil end portions of the coil assembly outward from inside to expand the coil end portions in diameter; and a restrictor that is arranged outside the coil assembly, restricts outward movement of the coil end portions expanded in diameter by the coil presser, and sandwiches the coil end portions of the coil assembly inserted in the slots with the coil presser.

An electric machine provided with a stator structure including internal and external layers of interleaved pre-wound coils made of rectangular wire coated with enamel insulation varnish is described herein. The two layers of pre-wound coils allow the use of slightly different size of pre-wound coils, which facilitates their insertion into the stator slots.

A stator includes a stator core having a plurality of slots in a circumferential direction about an axis and having an end surface in a direction of the axis, and a first coil and a second coil of different phases which are wound on the stator core in distributed winding. A winding factor is 1. Each of the first coil and the second coil has winding portions, the number of which corresponds to the number of poles. The winding portions include first and second winding portions adjacent to each other in the circumferential direction. The first and second winding portions are inserted into one slot of the plurality of slots and extend from the one slot to both sides in the circumferential direction on the end surface. The first and second coils are annularly disposed in different positions in a radial direction about the axis on the end surface.

The invention relates to a package carrier for installing a plurality of wire windings into a component such as a stator or a rotor of an electrical machine, the component having a plurality of grooves running longitudinally which are designed to receive wire sections of the wire windings.

According to one embodiment, each of a pair of straight sections of a coil segment is inserted into a slot of a stator core from a first end face side of the stator core, extension end sections of the straight sections are made to protrude from a second end face side of the stator core. A jig is arranged on the second end face side of the stator core in a state where each of extension end section hold sections of the coil segment is held by the jig, the position of the jig relative to the stator core is turned in a circumferential direction, a bend section positioned between the stator core and the jig is bent in the circumferential direction, and the whole of the extension end section hold section is cut off.

A device comprises a rotor magnetically coupled to a stator, a plurality of slots for accommodating a plurality of conductors, wherein the plurality of slots is evenly spaced, and each slot is configured to accommodate at least one conductor of the plurality of conductors, and wherein each conductor has a first end and a second end, and wherein the second end is configured to be coupled to a power converter and a plurality of connection apparatuses connected to first ends of the plurality of conductors.

A motor including a wound coil includes: a stator core, a cross-section of which has a ring-shape, extending in a longitudinal direction of the motor, the stator core including a plurality of teeth in the stator core, the plurality of teeth are spaced apart from each other in a circumferential direction of the stator core, and a plurality of slots arranged between the plurality of teeth; a coil extending in a longitudinal direction of the stator core and extends into the plurality of slots; and a coupling core, which includes shoes coupled to inner ends of the plurality of teeth and which is disposed inside the stator core so as to be integrally coupled to the stator core.

An embodiment provides a stator core including a plurality of first single teeth, a plurality of second single teeth and coils. The teeth are I-shaped and each have a long side, a short side, a connection portion and a wire-accommodating slot located on the sides of the connection portion. The coils are wound around the connection portions and accommodated in the wire-accommodating slots. The stator core is an annular element formed by splicing first single teeth and second single teeth in sequence in a staggered manner into a circle, and winding modes of the coils on the first single teeth and the second single teeth are different, so that the contour of the coils located on the outer side of the wire-accommodating slots of the first single teeth is different from the contour of the coils located on the outer side of the wire-accommodating slots of the second single teeth.

A motor including a wound coil includes: a stator core, a cross-section of which has a ring-shape, extending in a longitudinal direction of the motor, the stator core including a plurality of teeth in the stator core, the plurality of teeth are spaced apart from each other in a circumferential direction of the stator core, and a plurality of slots arranged between the plurality of teeth; a coil extending in a longitudinal direction of the stator core and extends into the plurality of slots; and a coupling core, which includes shoes coupled to inner ends of the plurality of teeth and which is disposed inside the stator core so as to be integrally coupled to the stator core.