A stator includes a plurality of same laminations each defining a piloting tab on a perimeter thereof, and stacked to form a stator body and such that the piloting tabs define at least two axially extending serrated edge portions spaced apart from one another around a perimeter of the stator body or at least two sets of axially aligned housing contact pads spaced apart from one another around the perimeter.

A coil includes: a strand-wound body configured with stacked n turns of a wound strand that is made of a conductor and has a quadrangular cross-section, where n is a natural number; and an insulating resin covering a surface of the strand-wound body. An i-th turn, where i is an integer and 1≤i≤n, has a quadrangular ring shape having four side portions, and in the i-th turn, the insulating resin covers a surface of each of the four side portions. In the first to n-th turns, the insulating resin is continuously and integrally formed.

A rotary electric machine comprises a two-pole rotor, a three-phase armature winding, and a stator core having fifty-four slots. An armature winding is stored as a top coil piece and a bottom coil piece in two layers in the slot of the stator core and has three parallel circuits and two phase belts per one phase. Each phase belt includes two parallel circuits. When a sequence of the first and second parallel circuits of one phase belt is viewed from a side closer to a phase belt center, those parallel circuits are arranged in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the top coil pieces and in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces. For a sequence of the second and third parallel circuits of the other the phase belt, those parallel circuits are arranged in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the top coil pieces and in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces.

A rotary electric machine comprises a two-pole rotor, a three-phase armature winding, and a stator core having fifty-four slots. An armature winding is stored as a top coil piece and a bottom coil piece in two layers in the slot of the stator core and has three parallel circuits and two phase belts per one phase. Each phase belt includes two parallel circuits. When a sequence of the first and second parallel circuits of one phase belt is viewed from a side closer to a phase belt center, those parallel circuits are arranged in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the top coil pieces and in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces. For a sequence of the second and third parallel circuits of the other the phase belt, those parallel circuits are arranged in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the top coil pieces and in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces.

An electromagnetic coil where a conductive member is wound so as to surround an air core region includes an effective coil portion, a first coil end portion, and a second coil end portion. The effective coil portion is formed of a coil-use conductive wire formed by bundling a plurality of conductive base members, the first coil end portion is formed of a first end member that is made of a solid conductive material, and the second coil end portion is formed of a second end member made of a solid conductive material. In the air core region of “one magnetic material” to which an electric current of a first phase is supplied, the effective coil portion of “the other electromagnetic coil” to which an electric current of a second phase is supplied is fitted.

An electromagnetic coil where a conductive member is wound so as to surround an air core region includes an effective coil portion, a first coil end portion, and a second coil end portion. The effective coil portion is formed of a coil-use conductive wire formed by bundling a plurality of conductive base members, the first coil end portion is formed of a first end member that is made of a solid conductive material, and the second coil end portion is formed of a second end member made of a solid conductive material. In the air core region of “one magnetic material” to which an electric current of a first phase is supplied, the effective coil portion of “the other electromagnetic coil” to which an electric current of a second phase is supplied is fitted.

A stator includes a stator core having a substantially cylindrical back yoke and a plurality of teeth extending radially inward from the back yoke. The stator core includes a plurality of stator core pieces each having one tooth and a yoke piece forming part of the back yoke. On an inside of the back yoke in a radial direction, adjacent ones of the stator core pieces directly contacting each other or indirectly contacting each other with a member, as an intervening part, interposed between the adjacent ones of the stator core pieces.

The invention relates to the shaftless horizontal axis wind turbine for generating electricity from the flow of fluid. The major components of the shaftless horizontal axis wind turbine consist of a stator and a rotor. The major components of the stator consist of a set of copper coils installed along a circular circumference of the stator frame and electrically connected as the Star connection (3-phase) circuit. The major components of the rotor consist of at least a set of the turbine blade, roller, and magnet set. The turbine blade has optimized an obtuse angle (θ.sub.T) of the turbine blade holder and a rotation angle (θ.sub.R) between the turbine blade holder and turbine blade to create the open channel in the middle of the shaftless horizontal axis wind turbine, which is shaped like a nozzle without shaft at the center of horizontal axis wind turbine.

In a stator, coils of multiple phases are wound around a stator core via an insulator. A guide member is provided on one side of the stator core in the axial direction and guides the terminal line of the coil in the circumferential direction at a position overlapping the coil in the axial direction. Parts of the plurality of terminal lines drawn in the circumferential direction on the bottom part, which is the same end surface in the axial direction of the guide member, are shifted in the axial direction and the radial direction respectively.

In a stator or a rotary electric machine, an insulating sheet spreads between two coils adjacent to each other in a circumferential direction in each slot. The insulating sheet covers the end in a third direction of the coil wound in a corresponding tooth, between end surfaces in an axial direction and between an inward-directed surface and an inclined surface in a radial direction. In the slot, an insulating sheet wrapping the adjacent coil is present, but the insulating sheet does not cover the end in a fourth direction of the coil wound around the corresponding tooth.