CN215498455U - Stator and motor with same - Google Patents

Abstract

The utility model provides a stator and a motor with the same.A wire inserting end of a conductor is formed at one axial end of an outer shaft of a stator iron core slot, and a welding end of the conductor is formed at the other axial end of the outer shaft of the stator iron core slot; the pitch of the welding end of the conductor connected with the other axial end of the stator core slot in each phase winding is equal to the pitch of the wire inserting end of the partial conductor positioned at one axial end of the stator core slot in the phase winding, and the leading-out wire of each phase winding is positioned at one side of the wire inserting end of the conductor positioned at one axial end of the stator core slot; the technical scheme of stator in this application embodiment its pitch through the welding end that lies in stator iron core out of groove axial other end and be connected in every phase winding equals the pitch of the plug wire end that lies in the partial conductor of stator iron core out of groove axial one end in this phase winding, reduces the torque fluctuation, and the harmonic is few, the noise reduction, and the mode of arranging is simple, and then reduces the preparation technology complexity, reduction in production cost to improve motor efficiency.

Description

Stator and motor with same

Technical Field

The utility model relates to the field of motors, in particular to a stator and a motor with the stator.

Background

In the prior art, a motor stator winding comprises various types of conductors, and various types of conductor coils penetrate into a slot of a stator core according to a certain arrangement mode to form the required winding of a single-phase motor or a multi-phase motor. The motor stator winding used in the prior art is used as the integral pitch in two slots of the same coil, the electromotive force of fundamental waves and harmonic waves is large, the counter electromotive force harmonic waves of the motor are higher, and the noise of the motor is large.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and a motor, which have the advantages of torque fluctuation reduction, less harmonic waves, noise reduction, simple arrangement mode, complexity reduction of a manufacturing process, production cost reduction and motor efficiency improvement.

In order to achieve the above object, according to one aspect of the present invention, there is provided a stator including:

a stator winding; a plurality of phase windings formed including a plurality of conductors;

the stator winding is arranged on the slots of the stator core, a wire inserting end of a conductor is formed at one axial end outside the slots of the stator core, and a welding end of the conductor is formed at the other axial end outside the slots of the stator core;

the pitch of the welding end of the conductor, which is positioned at the other axial end outside the stator core slot and connected with the welding end of the conductor, in each phase winding is equal to the pitch of the wire plugging end of the conductor, which is positioned at one axial end outside the stator core slot, in the phase winding, and the leading-out wire of each phase winding is positioned on one side of the wire plugging end of the conductor at one axial end outside the stator core slot.

Further, the plug terminals of the partial conductors of each phase winding, which are located at one end of the stator core slot in the axial direction, are plug terminals of the other conductors except the plug terminals of the conductors on the inner side and the outer side in the radial direction of the stator core.

Further, the pitch of the plug ends of the conductors located on the inner side in the radial direction of the stator core in each phase winding is a short pitch, and the pitch of the plug ends of the conductors located on the outer side in the radial direction of the stator core in the phase winding is a long pitch.

Further, the pitch of the welding end of each phase winding, which is connected to the other end of the phase winding in the axial direction outside the stator core slot, is a long pitch.

Further, the pitch of the weld end of each phase winding, which is connected to the other end of the phase winding in the axial direction outside the stator core slot, is a short pitch.

Furthermore, the conductors positioned on the radial inner side of the stator core in each phase winding are conductors on the same layer, and the conductors positioned on the radial outer side of the stator core in each phase winding are conductors on the same layer.

According to another aspect of the present invention, there is provided an electric machine comprising the stator described above.

By applying the technical scheme of the utility model, the stator and the motor with the same comprise: a stator winding; a plurality of phase windings formed including a plurality of conductors; the stator winding is arranged on the slots of the stator core, a wire inserting end of a conductor is formed at one axial end outside the slots of the stator core, and a welding end of the conductor is formed at the other axial end outside the slots of the stator core; the pitch of the welding end of the conductor, which is positioned at the other axial end outside the stator core slot and connected with the welding end of the conductor, in each phase winding is equal to the pitch of the wire plugging end of the conductor, which is positioned at one axial end outside the stator core slot, in the phase winding, and the leading-out wire of each phase winding is positioned on one side of the wire plugging end of the conductor at one axial end outside the stator core slot. The technical scheme of stator in this application embodiment is located through every phase winding it equals the pitch of the plug wire end of the partial conductor that lies in stator iron core out of groove axial one end in this phase winding to be located the welding end that the stator iron core out of groove axial other end is connected, reduces the torque fluctuation, and the harmonic is few, the noise reduction, and the mode of arranging is simple, and then reduces the preparation technology complexity, reduction in production cost to improve motor efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural view of a stator in an embodiment of the present invention;

FIG. 2 is a partial schematic view of a phase winding of the stator winding in an embodiment of the present invention;

FIG. 3 is a schematic plan view of a phase winding in accordance with an embodiment of the present invention;

FIG. 4 is a schematic plane development of a phase winding according to a second embodiment of the present invention;

FIG. 5 is a schematic plane development of a phase winding in a third embodiment of the present invention;

FIG. 6 is a schematic plane development of a phase winding in a fourth embodiment of the present invention;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not used for limiting a specific order. The following embodiments of the present invention may be implemented individually, or in combination with each other, and the embodiments of the present invention are not limited in this respect.

The utility model provides a stator. In the application, the pitch is the interval between the two groove interiors connected by the plug wire end of the same U conductor along the circumferential direction, or the pitch is the sum of the span between the groove interiors corresponding to one welding end of one U conductor and the span between the groove interiors corresponding to one welding end of the other U conductor; it should be noted that, in this application, the radial inner side of the stator core may be a side close to the central axis direction of the stator core, or may be a side away from the central axis of the stator core, and the radial middle portion of the stator core is a conductor except for the rest portions located on the radial inner side and the radial outer side of the stator core.

Exemplarily, as shown in fig. 1 and 2, in an embodiment, a stator is provided, which includes a stator winding 10, the stator winding 10 includes 3 phase windings formed by a plurality of conductors, a U-phase winding or a V-phase winding or a W-phase winding, a stator core 20 having 48 slots 21 extending axially along the stator core 20 and uniformly spaced from an inner side thereof, the stator core 20 defines one tooth 22 by two adjacent slots 21, the stator core 20 forms two end faces 25, 26 of the stator core in an axial direction by laminating a plurality of annular magnetic steel plates, and other conventional metal plates may be used instead of the magnetic steel plates; the stator winding 10 is provided in the stator core slot 21, and a conductor insertion end 300 is formed at one axial end 25 of the stator core slot 21, and a conductor welding end 350 is formed at the other axial end 26 of the stator core slot 21.

Referring to fig. 1 and 2, in an embodiment, the stator winding 10 is formed by a plurality of U-shaped conductors and S-shaped conductors, the U-shaped conductors include two slot interiors located in the slots separated by a predetermined distance and a plug terminal connected to one axial end of the stator core slot outside the stator core slot to connect the two slot interiors, and two soldering terminals connected to the other axial end of the stator core slot outside the stator core slot to respectively connect the two slot interiors, and the S-shaped conductors include one slot interior and two soldering terminals located at two axial ends of the stator core slot outside the stator core slot to respectively connect the slot interiors; a plurality of conductors of the stator winding 10 are inserted into the stator iron core slot 21 from one end 25 outside the stator iron core slot, the welding ends of the plurality of conductors penetrate through the stator iron core slot 21 and form the welding ends of the plurality of conductors from the other end 26 outside the stator iron core slot in the axial direction, the welding ends of the plurality of conductors are sequentially connected at the other end 26 outside the stator iron core slot in the axial direction, so as to form the stator winding 10, each phase winding comprises two branch windings which are connected in parallel, the U-phase winding comprises a first branch winding and a second branch winding, the leading end of U1 is connected with an S-shaped conductor and then sequentially connected with a plurality of U-shaped conductors along the circumferential direction of the stator iron core, and then connected with a leading end of U1 by an S-shaped conductor to form a first branch winding, the leading end of U2 is connected with an S-shaped conductor and then sequentially connected with a plurality of conductors along the circumferential direction of the stator iron core, and then connected with a leading end of U2 by an S-shaped conductor to form a second branch winding; and 4 layers are formed in the radial direction of the stator core 20, which may be an even number greater than equal 4 here, i.e. the stator windings form the plug end of the conductor at one axial end 25 outside the stator core slot and the weld end of the conductor at the other axial end 26 outside the stator core slot.

Illustratively, as shown in fig. 1 to 6, the pitch of the weld end 350 of each phase winding connected to the other end 26 in the stator core slot outer axial direction is equal to the pitch of the plug end 300 of the portion of the conductor 210 of the phase winding located at the one end 25 in the stator core slot outer axial direction, and the lead wire of each phase winding is located at the plug end 300 of the conductor at the one end 25 in the stator core slot outer axial direction.

In particular, in the embodiment shown in fig. 2 to 6, the plurality of connected welding ends 350 located at the other axial end 26 outside the stator core slot in each phase winding are connected with the welding ends located inside the radial 4 th layer 7 th slot of the stator core and corresponding to the radial 3 rd layer 2 nd slot of the stator core in the conductors located in the 4 th layer 7 th slot and 14 th slot of the stator core to form a first welding end, the welding ends located inside the radial 2 rd layer slot of the stator core in the conductors located in the 3 rd layer 2 nd slot and 2 nd layer 7 th slot of the stator core are connected with the welding ends located inside the radial 2 nd layer 7 th slot of the stator core and corresponding to the radial 1 st layer 2 nd slot of the stator core in the conductors located in the 1 st layer 2 nd slot and 8 th slot of the stator core to form a second welding end, the welding end corresponding to the inside of the slot of the radial 4 th layer 13 th slot of the stator core in the conductors of the 4 th layer 13 th slot and the 20 th slot of the stator core is connected with the welding end corresponding to the inside of the slot of the radial 3 rd layer 8 th slot of the stator core in the conductors of the 3 rd layer 8 th slot and the 2 nd layer 13 th slot of the stator core to form a third welding end, the welding end corresponding to the inside of the slot of the radial 2 nd layer 13 th slot of the stator core in the conductors of the 2 nd layer 13 th slot and the 3 rd layer 8 th slot of the stator core is connected with the welding end corresponding to the inside of the slot of the radial 1 st layer 8 th slot of the stator core in the conductors of the 1 st layer 8 th slot and the 3 rd slot of the stator core to form a fourth welding end, and each phase winding in the embodiment comprises 32 welding ends, the other 28 welding ends are different from the above only in the number of slots of the stator core, and are not further described herein; with reference to fig. 1 to 6, the lead end and the lead-out end of each phase winding are connected to an S-shaped conductor, one of the two welding ends of the S-shaped conductor is located at the axial other end 26 outside the stator core slot and is connected to the welding ends of the other U-shaped conductors located at the axial other end 26 outside the stator core slot, and one of the two welding ends of the S-shaped conductor is located at the axial one end 25 outside the stator core slot and is connected to the lead-out wire of the phase winding, that is, the lead-out wire of each phase winding is located at the plug wire end of the conductor; the motor has the advantages of reducing torque fluctuation, few harmonic waves, reducing noise, and being simple in arrangement mode, further reducing complexity of manufacturing process, reducing production cost and improving motor efficiency.

Referring to fig. 3 to 5, in the first to third embodiments, the plug ends of the partial conductors 210 at the one axial end 25 outside the stator core slot in each phase winding are located at the 2 nd and 3 rd layers of the stator core, and referring to fig. 6, in the fourth embodiment, the plug ends of the partial conductors 210 at the one axial end 25 outside the stator core slot in each phase winding are located at the 2 nd and 3 rd layers of the stator core radial direction, and the conductors 210 at the 4 th and 5 th layers of the stator core radial direction, so that it can be seen that the plug ends of the partial conductors at the one axial end outside the stator core slot in each phase winding are the plug ends of the conductors 210 located at the middle portion except the conductors at the radially inner side and the outer side of the stator core.

Further, with reference to fig. 3 to 6, in the first to fourth embodiments, the pitch of the plug end of the conductor 230 located on the inner side in the radial direction of the stator core in each phase winding is a short pitch, and the pitch of the plug end of the conductor 240 located on the outer side in the radial direction of the stator core in the phase winding is a long pitch; specifically, the pitch of the plug ends of the first conductor 230 located in the 3 rd slot and the 8 th slot of the 1 st layer of the stator core, the second conductor 230 located in the 9 th slot and the 14 th slot of the 1 st layer of the stator core, the third conductor 230 located in the 15 th slot and the 20 th slot of the 1 st layer of the stator core, the fourth conductor 230 located in the 21 st slot and the 26 th slot of the 1 st layer of the stator core, the fifth conductor 230 located in the 27 th slot and the 32 th slot of the 1 st layer of the stator core, the sixth conductor 230 located in the 33 rd slot and the 38 th slot of the 1 st layer of the stator core, the seventh conductor 230 located in the 39 th slot and the 44 th slot of the 1 st layer of the stator core, the 45 th slot and the 2 nd slot of the stator core, that is, i.e., the eighth conductor 230 located in the inner side of the stator core, is 5 short pitches; a first conductor 240 located in the 1 st slot and the 8 th slot of the 4 th layer of the stator core, a second conductor 240 located in the 7 th slot and the 14 th slot of the 4 th layer of the stator core, a third conductor 240 located in the 13 th slot and the 20 th slot of the 4 th layer of the stator core, a fourth conductor 240 located in the 19 th slot and the 26 th slot of the 4 th layer of the stator core, a fifth conductor 240 located in the 25 th slot and the 32 th slot of the 4 th layer of the stator core, a sixth conductor 240 located in the 31 st slot and the 38 th slot of the 4 th layer of the stator core, a seventh conductor 240 located in the 37 th slot and the 44 th slot of the 4 th layer of the stator core, an eighth conductor 240 located in the 43 th slot and the 2 nd slot of the 4 th layer of the stator core, namely, the pitch of the plug wire ends of the conductor 240 located outside the stator core is a long pitch 7; further, the conductor located on the inner side in the radial direction of the stator core in each phase winding is a same-layer (first-layer) conductor 230, and the conductor located on the outer side in the radial direction of the stator core in each phase winding is a same-layer (fourth-layer) conductor 240.

Referring to fig. 5, in the third embodiment, the pitch of the welding terminals 350 connected to each other in the other axial end 26 of each phase winding located outside the stator core slot 21 is a long pitch, specifically, the welding terminal corresponding to the inside of the stator core slot 2 located in the 8 th slot and the 1 st slot of the stator core among the conductors 210 located in the 8 rd slot and the 2 nd slot of the 3 rd layer and the 2 nd layer of the stator core is connected to the welding terminal corresponding to the inside of the stator core slot 1 located in the 8 th slot of the 1 st layer of the stator core among the conductors 230 located in the 8 th slot and the 3 rd slot of the 1 st layer of the stator core to form a first welding terminal 350, the welding terminal corresponding to the inside of the stator core slot 2 nd layer of the 9 th slot and the 2 nd slot among the conductors 210 located in the 3 rd layer and the 2 nd layer of the stator core is connected to the welding terminal corresponding to the inside of the stator core slot 9 th slot and the 14 th slot among the conductors 230 located in the 1 st layer of the stator core to form a second welding terminal 350, the welding end corresponding to the inside of the slot of the 1 st slot on the 4 th layer of the stator core in the conductor 240 of the 8 th slot and the 1 st slot on the 4 th layer of the stator core is connected with the welding end corresponding to the inside of the slot of the 8 th slot on the 3 rd layer of the stator core in the conductor 210 of the 1 st slot and the 2 nd layer of the stator core in the conductor 240 of the 3 rd layer of the stator core to form a third welding end 350, the welding end corresponding to the inside of the slot of the 4 th layer of the stator core in the conductor 240 of the 2 nd slot and the 4 th layer of the 44 th slot on the 4 th layer of the stator core is connected with the welding end corresponding to the inside of the slot of the 9 th slot on the 3 rd layer of the stator core in the conductor 210 of the 2 nd layer of the stator core to form a fourth welding end 350, the welding end corresponding to the inside of the slot of the 2 nd layer of the stator core in the conductor 210 of the 3 rd layer 14 th slot and the 2 nd layer 7 th slot and the 14 th slot on the stator core is connected with the welding end corresponding to the 14 th slot on the 1 st layer of the stator core in the 1 st slot, The welding ends corresponding to the inside of the 14 th slot of the 1 st layer of the stator core in the 9 th slot conductor 230 are connected to form a fifth welding end 350, the welding ends corresponding to the inside of the 8 th slot of the 2 nd layer of the stator core in the conductors 210 of the 15 th slot of the 3 rd layer and the 8 nd slot of the 2 nd layer of the stator core are connected to the welding ends corresponding to the inside of the 15 th slot of the 1 st layer of the stator core in the conductors 230 of the 15 th slot of the 1 st layer of the stator core and the 20 th slot of the 1 st layer of the stator core to form a sixth welding end 350, the welding ends corresponding to the inside of the 7 th slot of the 4 th layer of the stator core in the conductors 240 of the 4 th layer and the 4 th slot of the 4 th layer of the stator core are connected to form a seventh welding end 350, the welding ends corresponding to the inside of the 14 th slot of the 3 rd layer of the stator core in the conductors 210 of the 2 nd layer and the 7 th slot of the 4 th layer of the stator core are connected to form a seventh welding end 350, and the 8 th slot of the stator core, In the conductor 240 of the 4 th layer 1 st slot, the welding end corresponding to the inside of the slot of the 4 th layer 8 th slot of the stator core is connected to the welding end corresponding to the inside of the slot of the 15 th slot of the 3 rd layer of the stator core in the conductor 210 of the 3 rd layer 8 th slot of the stator core in the conductor 210 of the 3 rd layer of the stator core to form an eighth welding end 350, in this embodiment, 32 connected welding ends are included, the connection manner of the remaining 24 connected welding ends is the same as that of the 8 connected welding ends 350, and the difference is only between the welding ends and the slots located in different slots, which is not further described herein, and the pitch of the welding end 350 connected to the other end in the axial direction of the stator core slot is a long pitch of 7.

Referring to fig. 3 and 4, in the first and second embodiments, the pitch of the welding terminals 350 connected to each other in the axial other end 26 of the stator core slot 21 in each phase winding is a short pitch, specifically, the welding terminal corresponding to the inside of the slot of the 7 th slot of the 2 nd layer of the stator core in the conductor 210 of the 2 nd layer and the 7 th slot of the 2 nd layer of the stator core is connected to the welding terminal corresponding to the inside of the slot of the 2 nd slot of the 1 st layer of the stator core in the conductor 230 of the 1 st layer and the 45 th slot of the stator core to form a first welding terminal 350, the welding terminal corresponding to the inside of the slot of the 8 th slot of the 2 nd layer of the stator core in the conductor 210 of the 3 rd layer and the 2 nd slot of the 2 nd layer of the stator core is connected to the welding terminal corresponding to the inside of the slot of the 3 rd layer and the 8 th slot of the stator core 230 to form a second welding terminal 350, the welding end corresponding to the inside of the slot of the 7 th slot on the 4 th layer of the stator core in the conductor 240 positioned in the 7 th slot on the 4 th layer of the stator core and the 14 th slot on the 4 th layer of the stator core is connected with the welding end corresponding to the inside of the slot of the 2 nd slot on the 3 rd layer of the stator core in the conductor 210 positioned in the 2 rd layer of the stator core and the 2 rd slot on the 3 rd layer of the stator core in the conductor 240 positioned in the 8 th layer of the stator core and the 4 th slot on the 4 th layer of the stator core to form a third welding end 350, the welding end corresponding to the inside of the slot of the 2 nd layer of the stator core in the conductor 210 positioned in the 3 rd layer of the stator core and the 2 nd slot on the 2 nd layer 8 th layer of the stator core is connected with the welding end corresponding to the welding end positioned in the inside of the 2 nd slot on the 1 st layer of the stator core, The welding ends corresponding to the inside of the 8 th slot of the 1 st layer of the stator core in the 3 rd slot conductor 230 are connected to form a fifth welding end 350, the welding ends corresponding to the inside of the 9 th slot of the 2 nd layer of the stator core in the conductors 210 of the 14 th and the 9 nd slots of the 3 rd layer of the stator core and the 9 th slot of the 2 nd layer of the stator core in the conductors 230 of the 1 st layer of the stator core and the 14 th slot of the stator core are connected to form a sixth welding end 350, the welding ends corresponding to the inside of the 13 th slot of the 4 th layer of the stator core in the conductors 240 of the 4 th and the 4 th layer of the stator core and the welding ends corresponding to the inside of the 8 th slot of the 3 rd layer of the stator core in the conductors 210 of the 4 th and the 4 th slots of the stator core are connected to form a seventh welding end 350, the welding ends corresponding to the inside of the 8 th slot of the 3 rd layer of the stator core in the 14 th and the 2 nd slots of the 4 th layer of the stator core, In the conductor 240 of the 7 th slot on the 4 th layer, the welding end corresponding to the inside of the slot located in the 4 th layer, 14 th slot of the stator core is connected to the welding end corresponding to the inside of the slot located in the 9 th slot on the 3 rd layer of the stator core in the conductor 210 located in the 3 rd layer, 14 th slot of the stator core to form an eighth welding end 350, in this embodiment, 32 connected welding ends are included, the connection manner of the remaining 24 connected welding ends is the same as that of the 8 connected welding ends 350, and the difference is only between the welding ends and the welding ends located in different slots, which is not further described herein, and the pitch of the welding end 350 connected to the other end in the axial direction of the stator core slot is a short pitch 5; further, the difference between the first embodiment and the second embodiment is that the position of the outgoing line in each phase of winding may be located in any layer of any radial slot of the stator core in the circumferential direction, and the outgoing line of the structure of the application may be located in any layer of any radial slot of the stator core.

The embodiment also provides a motor, which comprises the stator and the motor adopting the stator.

The motor provided by the embodiment of the present invention includes the stator in the above embodiment, and therefore, the motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and details are not described herein again.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be mechanical or electrical, may be direct, may be indirect via an intermediate medium (bus connection), or may be communication between the two components. Those skilled in the art will understand what is specifically meant by the present invention. Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention and the technical principles applied.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, and that various obvious changes, rearrangements and substitutions may be made therein by those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (7)

1. A stator, characterized by: the method comprises the following steps:

a stator winding; a plurality of phase windings formed including a plurality of conductors;

the stator winding is arranged on the slots of the stator core, a wire inserting end of a conductor is formed at one axial end outside the slots of the stator core, and a welding end of the conductor is formed at the other axial end outside the slots of the stator core;

the pitch of the welding end of the conductor, which is positioned at the other axial end outside the stator core slot and connected with the welding end of the conductor, in each phase winding is equal to the pitch of the wire plugging end of the conductor, which is positioned at one axial end outside the stator core slot, in the phase winding, and the leading-out wire of each phase winding is positioned on one side of the wire plugging end of the conductor at one axial end outside the stator core slot.

2. The stator according to claim 1, wherein the plug ends of the partial conductors in each of the phase windings located at one end of the stator core slot in the axial direction are plug ends of the remaining conductors located except for the plug ends of the conductors located radially inside and outside the stator core.

3. The stator according to claim 2, wherein the pitch of the plug ends of the conductors located radially inside the stator core in each of the phase windings is a short pitch, and the pitch of the plug ends of the conductors located radially outside the stator core in the phase winding is a long pitch.

4. The stator as claimed in claim 1, wherein the pitch of the weld end of each of the phase windings, which is connected to the other end of the stator core slot in the axial direction, is a long pitch.

5. The stator as claimed in claim 1, wherein the pitch of the weld end of each of the phase windings, which is connected to the other end of the stator core slot in the axial direction, is a short pitch.

6. A stator according to claim 3, wherein the conductors in each of the phase windings located radially inward of the stator core are layer conductors, and the conductors in the phase windings located radially outward of the stator core are layer conductors.

7. An electrical machine comprising a stator according to any one of claims 1 to 6.

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