JP2004159460A - Stator for rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator which makes it possible to obtain the same power generation characteristics as conventional, and reduce the depth of slots in which conductor segments are housed and thus the outside diameter of a stator core. <P>SOLUTION: The stator 20 for rotary electric machine comprises the stator core 21 and a plurality of the conductor segments 30 and 40. The stator core comprises an annular portion 22 and a plurality of teeth 23 which compartmentalizes a plurality of the slots 26. Each conductor segment comprises a U-shaped turn portion 31, 41 positioned at one end, a pair of joints 36, 37, 46, 47 positioned at the other end, and a pair of housing portions 33, 34, 43, 44 positioned in-between. Each slot is so formed that its circumferential length on the back side 26b is larger than its circumferential length on the open side 26a. The circumferential length of the housing portions 43, 44 and the housing portions 33, 34 corresponds to the circumferential length of the slots. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stator of a rotating electric machine, particularly to a shape of a slot of a stator core, that is, a cross-sectional shape of a pair of receiving portions of a conductor segment contained in the slot.
[0002]
[Prior art]
One type of rotating electric machine is a vehicle alternator (alternator). The alternator includes a housing, a stator (stator) fixed to the housing and functioning as an armature, a rotor (rotor) rotatably supported by the housing and facing the stator and functioning as a field element, and converting AC power into DC power. It consists of a rectifier to convert.
[0003]
The stator includes a stator core (stator core) and a stator winding (stator coil). The stator core has an annular portion (yoke) and a number of teeth (teeth) projecting inward from an inner peripheral surface thereof and defining a number of slots. A plurality of stator coils are accommodated in each slot.
[0004]
The stator coils are housed in the slots in various ways. Conventionally, a continuous (single) stator coil is bent into a rectangular pulse shape, and one end curved portion protruding from one end surface of the stator core and the other end curved portion protruding from the other end surface side are axially interposed between the two. An extending joint (housing) is formed. Then, the bent stator coil is inserted into the slot of the stator core from the opening side to the back side, that is, in the radial direction. At that time, the stator coil had a round cross section for reasons such as easy insertion.
[0005]
In recent years, with the electrification of vehicles, a higher output has been required of the alternator, and it is necessary to reduce the resistance of the stator coil to increase the output. When the continuous and round cross-section stator coil is inserted into the slot, a gap is formed between the round-shaped receiving portions or between the receiving portion and the corner of the slot. There are problems such as being restricted by the size of the part.
[0006]
Therefore, the applicant of the present application has previously filed an application for a stator in which the stator coil is formed into a plurality of divided conductor segments and the cross-sectional shape of the housing portion is square (rectangular) (see Patent Document 1).
[0007]
[Patent Document 1]
JP-A-2001-37132
[Problems to be solved by the invention]
In the conventional example shown in FIG. 9, the two conductor segments 110 and 115 have a pine needle shape as a whole, and each include a pair of accommodation sections 111, 112 and 116, 117 having a substantially square cross section and the same shape. The housing portions 111 and 112 are housed on the opening side of the slot 121 of the stator core 120, and the housing portions 116 and 117 are housed on the back side. Correspondingly, the width of the slot 121 is uniform over the entire depth. As a result, the width of the tooth portion 122 is narrow on the distal end side (inner peripheral side) and is wider on the root side (outer peripheral side).
[0009]
Since the teeth 122 serve as a path for the lines of magnetic force, the width of the teeth 122 is desirably wide in forming a magnetic circuit. However, in the conventional example, the width on the tip side is narrow. When the width on the distal end side is increased, the width on the opening side of the slot 121 is reduced, and the width of the housing portions 111 and 112 of the conductor segment 110 stored on the distal end side is reduced. In this case, in order to obtain necessary power generation characteristics, it is necessary to increase the thickness of the housing portions 111, 112, 116, and 117 of the conductor segments 110 and 115 and to increase the depth of the slots 121. Then, the radial length of the stator core 120 and thus the stator increases.
[0010]
The present invention has been made in view of the above circumstances, and has a power generation characteristic equivalent to that of the related art, while reducing the radial length (depth) of the slot, thereby reducing the outer diameter of the stator core. It is intended to provide a stator.
[0011]
[Means for Solving the Problems]
The inventor of the present application has studied a method for reducing the slot depth of a stator core without deteriorating power generation characteristics in a stator in which a stator coil includes a plurality of conductor segments. As a result, the inventors came up with the idea of making the circumferential length (width) different between the opening side and the back side of the slot, and changing the cross-sectional shape of the accommodating portion of the conductor segment accordingly, and completed the present invention.
[0012]
The stator according to the first invention of the present application is, as described in claim 1, a stator core having an annular portion and a plurality of tooth portions projecting inward from an inner peripheral surface of the annular portion to define a plurality of slots; And a plurality of conductor segments having a pine needle shape including a U-shaped turn portion at one end, a pair of joint portions at the other end, and a pair of intermediate storage portions housed in the slots. The circumferential length of the back side of each slot is longer than the circumferential length of the opening side, and the widths of the back side receiving section and the opening side receiving section correspond to the circumferential length of the slot. It is characterized by the following.
[0013]
In this stator, the slot is suitable for accommodating a conductor segment having an accommodation portion having a small cross-sectional shape on the back side thereof. According to a second aspect of the present invention, in the second aspect, the circumferential length of each tooth portion is constant from the tip end to the root.
[0014]
A stator according to a second aspect of the present invention is a stator core having an annular portion and a plurality of teeth projecting inward from an inner peripheral surface of the annular portion to define a plurality of slots; A plurality of conductor segments having a pine needle shape including a U-shaped turn portion, a pair of joining portions at the other end, and a pair of intermediate accommodation portions accommodated in the slot; The thickness of the accommodation portion on the back side is shorter than the thickness of the accommodation portion on the opening side, and the length in the radial direction of the slot corresponds to the accommodation portion on the innermost side.
[0015]
In this stator, the accommodating portion of the conductor segment on the back side of the slot has a short thickness, that is, has a generally elongated cross-sectional shape in the width direction. Therefore, the depth on the back side of the slot can be reduced by the thickness.
[0016]
According to a fourth aspect of the present invention, in the third aspect, the width of the accommodation portion on the back side of the slot is longer than the width of the accommodation portion on the opening side. According to a fifth aspect of the present invention, the stator core according to the fourth aspect has the same square cross section or rectangular cross section for each of two adjacent storage portions in the slot. According to a sixth aspect of the present invention, in the fifth aspect, the two accommodating portions of the conductor segment closest to the opening have a square cross section, and the two accommodating portions of the other conductor segments have a rectangular cross section having a width longer than the thickness. Have.
[0017]
According to a seventh aspect of the present invention, in the stator core according to the fifth aspect, the two accommodating portions of the first conductor segment on the opening side and the two accommodating portions of the second conductor segment on the back side have the same rectangular cross-section, and The long side of the accommodating portion is oriented in the radial direction of the slot, and the long side of the accommodating portion of the second conductor segment is oriented in the circumferential direction. In the stator core according to claim 8, in claim 6 or 7, all of the plurality of housing portions have the same sectional area.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
<Rotating electric machine, stator>
The rotating electric machine of the present invention includes an AC motor and an AC generator. For example, an alternator includes a housing, a stator, a rotor, and the like. The plurality of teeth and slots of the stator core of the stator are determined by the number of phases. For example, in the case of three phases, it is a multiple of three.
<Stator core, stator coil>
The stator includes a stator core and a stator coil. It is desirable that all of the plurality of teeth and the plurality of slots of the stator core have the same shape, and that the width of the slot is narrow on the opening side (inner side) and wider on the inner side (outer side). With this configuration, the width of the tooth portion between the adjacent slots becomes substantially constant in the entire radial direction. The stator coil comprises a plurality of conductor segments housed in slots.
<Conductor segment>
Each conductor segment has a pine needle shape as a whole, and includes a U-shaped turn portion at one end in the longitudinal direction, a pair of intermediate storage portions connected to the turn portion, and a pair of joint portions at the other end connected to the turn portion. The housing portion is housed in a different slot of the stator core, the turn portion protrudes axially from one end surface, and the joint portion protrudes from the other end surface.
(1) Number of conductor segments and housing portions One housing portion and the other housing portion of each conductor segment are housed in slots spaced apart in the circumferential direction. As a result, each slot accommodates one or the other of the four conductor segments, that is, four accommodation portions, or one or the other of the eight conductor segments, that is, eight accommodation portions. .
{Circle around (2)} Cross-sectional shape of storage portion The cross-sectional shape of the storage portion on the opening side of the slot is a square, a rectangular shape having a thickness larger than the width (the width is smaller than the thickness), or a width larger than the thickness (the thickness). (Smaller than the width). The cross-sectional shape of the accommodation portion on the back side of the slot may be any of a square or a rectangle having a width larger than the thickness (the thickness is smaller than the width).
[0019]
The width and / or thickness of the receiving portions may differ one by one, or may differ every two. In the former case, the two storage portions of the conductor segment will have different cross-sectional shapes. The latter will be described in Examples. The width of the accommodation portion corresponds to the width of the portion of the slot in which the accommodation portion is accommodated. As a result, the outer side surface of the accommodation portion comes close to the inner side surface of the slot.
[0020]
It is desirable that the cross-sectional areas of all the accommodating portions in each slot are the same (first type), but they may be different (second type). In the case of the first type, the cross-sectional shape of the storage portion becomes a rectangular shape whose width is larger than the thickness as it goes to the back side of the slot, and becomes a shape closer to a square as it goes to the opening side. In the case of the second type, for example, as shown in FIG. 8, the thickness of the plurality of storage portions 101, 102, 106, and 107 in the slot 110 is made the same, and the width is changed from the storage portion 101 on the opening side to the depth side. What is necessary is just to increase gradually toward the accommodation part 107.
[0021]
In the case of the first type of accommodating portion, a conductor segment on the back side and a conductor segment on the opening side can be formed by bending a material having the same shape and length in two directions in different directions.
{Circle around (3)} Joints Each conductor segment is inserted into two different slots from the axial direction with the two joints forward, and the joints are then bent in opposite directions in the circumferential direction. One of the bent joints is joined to the bent joint of the housing portion housed in the slot that is separated from the slot by a predetermined pitch in the first circumferential direction. The other bent joint portion is joined to the bent joint portion of the accommodation portion accommodated in the slot separated by a predetermined pitch in the second circumferential direction from the slot.
[0022]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
<First embodiment>
1 to 4 show a first embodiment. This is the case where the present invention is applied to a stator of an alternator, which is a three-phase AC generator, and has two conductor segments.
(Constitution)
As shown in FIG. 1, the alternator includes a housing 10, a stator 20 fixed to the housing, a rotor 16 mounted on a rotating shaft 12 rotatably supported by the housing 10, and a rectifier (not shown). The rotor 16 includes a rotor coil 17 and a rotor core 18.
[0023]
As shown in FIGS. 1 and 2, the stator 20 includes a stator core 21 and a stator coil 49 formed by joining a plurality of conductor segments 30 and 40. Among these, the stator core 21 is formed by laminating a plurality of steel plates, and has an annular portion (yoke) 22 and a plurality of inwardly protruding tooth portions (teeth) formed on the inner peripheral surface thereof at regular intervals in the circumferential direction. Part) 23. The width (length in the circumferential direction) of the tooth portion 23 is substantially constant from the front end portion (lower end portion in FIG. 2) 23a to the root portion 23b.
[0024]
As a result, the width of the slot 26 defined by the adjacent teeth 23 is the smallest on the opening side (lower side in FIG. 2) 26a, the largest on the far side 26b, and gradually increases between them. A wide portion 23c having a large circumferential length is formed at the distal end portion 23a of the tooth portion 23, and a narrow portion 26c is formed on the opening side 26a of the slot 26 correspondingly. Is a housing part of one (left) or the other (right) of the first, second, third and fourth conductor segments 30, 40, 130 and 140 via an insulator 28, that is, four housing parts 33. , 44, 133 and 144 are accommodated. Next, the conductor segments 30, 40 and the like will be described.
[0025]
As shown in FIG. 3, the first conductor segment 30 has a pine needle shape as a whole, and has a U-shaped turn portion 31 at one longitudinal end, a pair of intermediate portions 33 and 34 connected to the turn portion 31, and And a pair of joining portions 36 and 37 at the other end continuous with. The cross-sectional shapes of the left storage section 33 and the right storage section 34 are substantially square (see FIG. 2). The second conductor segment 40 has exactly the same configuration as the first conductor segment 30, and includes a turn portion 41, a pair of housing portions 43 and 44, and a pair of joint portions 46 and 47.
[0026]
On the other hand, the third conductor segment 130 has the same shape as the first conductor segment 30, and has a U-shaped turn portion at one end, a pair of storage portions 133 at an intermediate portion connected thereto, and a pair of other ends at the other end connected thereto. And a junction. However, as is clear from FIG. 2, the cross-sectional shape of the storage portion 133 and the like on the left is different from the cross-sectional shape of the storage portion 33 and the like of the first conductor segment 30 and is a rectangular shape having a width larger than the thickness. The width is the same as the width of the corresponding portion of the slot 26. Note that the cross-sectional areas of the housing section 33 and the like and the housing section 133 and the like are the same.
[0027]
The fourth conductor segment 140 has exactly the same configuration as the second conductor segment 40, and includes a turn portion, a pair of housing portions 143, and the like, and a pair of joint portions.
[0028]
The left accommodating portion 33 of the first conductor segment 30 is accommodated in the slot 26, and the right accommodating portion 34 is accommodated in three slots 226 separated rightward from the slot 26. The left accommodation portion 43 of the second conductor segment 40 is accommodated in the slot 126 three spaces leftward from the slot 26, and the right accommodation portion 44 is accommodated in the slot 26.
[0029]
As apparent from the above description, in FIGS. 2 and 4, the conductor segments in which the left receiving portions 33 and 133 are accommodated in the specific slot 26 are called the first conductor segment 30 and the third conductor segment 130. The conductor segments in which the right accommodation portions 44 and 144 are accommodated are referred to as a second conductor segment 40 and a fourth conductor segment 140. Here, regarding the first conductor segment 30 and the third conductor segment 130, the side where the accommodation portion 33 is on the opening side is the first conductor segment 30, and the side where the accommodation portion 133 is on the back side is the third conductor segment 130. I do. The same applies to the second conductor segment 40 and the fourth conductor segment 140. The second conductor segment 40 has the housing portion 44 on the opening side, and the fourth conductor segment 140 has the housing portion 144 on the back side. I do.
[0030]
In FIG. 4, only the first conductor segment 30 and the second conductor segment 40 on the opening side of the slot 26 are shown, and the third conductor segment 130 and the fourth conductor segment 140 on the far side are not shown. The third conductor segment 130 is located behind the first conductor segment 30 (the back side of the paper in FIG. 4), and the fourth conductor segment 140 is located behind the second conductor segment 40.
[0031]
As is clear from FIG. 2, the left accommodation portion 33 of the first conductor segment 30 is accommodated in the most open side 26a of the slot 26, and the second conductor segment 40 is accommodated in the right accommodation portion 44 second from the opening. ing. The right accommodation portion 144 of the fourth conductor segment 140 is accommodated in the innermost side 26b of the slot 26, and the left accommodation portion 133 of the third conductor segment 130 is accommodated second from the innermost side. As is clear from this, the cross-sectional shapes of the four housing portions 33 and 44 and the housing portions 133 and 144 are different every two.
[0032]
As shown in FIG. 4, the left joint portion 36 of the first conductor segment 30 is bent in the first circumferential direction (left direction in FIG. 4), and the slot of the left more first conductor segment (not shown) is formed. It is joined to a right joint 37 housed in a slot 126 three places to the left of 26. The right joint 37 in the slot 226 is bent rightward. The left joint 46 of the second conductor segment 40 is bent leftward. The right joint 47 is bent rightward and is joined to the left joint 46 of the second conductor segment (not shown) on the right.
[0033]
The above situation is the same for the left joint 133 and the right joint 134 of the third conductor segment 130 and the left joint 143 and the right joint 144 of the fourth conductor segment 140. .
(Effect)
The operation of the alternator having the above configuration is basically the same as that of the conventional example, and the description thereof will be omitted.
[0034]
The effect of the stator 20 is as follows. First, the width differs between the opening side 26a and the back side 26b of the slot 26 of the stator core 21. Correspondingly, the accommodation portion 33 of the first conductor segment 30 and the accommodation portion 44 of the second conductor segment 40 on the opening side 26a have a square cross section, but the accommodation portions 133 and 133 of the third conductor segment 130 on the back side 26b. The cross-sectional shape of the accommodating portion 144 of the fourth conductor segment 140 is smaller in thickness than width, and is a rectangular shape elongated in the circumferential direction.
[0035]
As a result, the depth of the slot 26 can be made smaller and the outer diameter of the stator core 21 can be made smaller than in the case where the cross-sectional shapes of the housing portions 133 and 144 are also square. Moreover, the cross-sectional area of the storage sections 133 and 144 having a rectangular cross section is the same as the cross-sectional area of the storage sections 33 and 44 having a square cross section. Therefore, the stator can have the same power generation characteristics as in the case where the cross-sectional shapes of the housing portions 133 and 144 are square.
[0036]
The width of the teeth 23 of the stator core 21 is substantially uniform from the tip 23a to the root 23b. In other words, the width of the distal end portion 23a is larger than the width of the distal end portion of the tooth portion of the conventional example shown in FIG. This is because the width of the storage portions 33 and 44 on the opening side 26a of the slot 26 is smaller than the width of the storage portions 133 and 144 on the rear side 26b. The width of the tip 23a of the tooth 23 is increased, which is convenient for forming a magnetic circuit.
<Second embodiment>
A second embodiment will be described with reference to FIGS. In the second embodiment, the accommodating portions 52 and 53 of the first and second conductor segments 50 on the opening side 26a of the slot 26 are the same as the accommodating portions 57 and 58 of the third and fourth conductor segments 55 on the inner side 26b. It differs from the first embodiment in that it has a cross-sectional shape (but in a different direction).
[0037]
More specifically, the receiving portions 52 and 53 have a rectangular cross section having a thickness larger than the width and being elongated in the radial direction, whereas the receiving portions 57 and 58 have a rectangular shape having a width larger than the thickness and being elongated in the circumferential direction. . The housing portions 52 and 53 and the housing portions 57 and 58 have the same length of the long side and the short side, and therefore have the same area.
[0038]
The first and second conductor segments 50 and the third and fourth conductor segments 55 were manufactured from the same material. As shown in FIG. 6, the first and second conductor segments 50 are obtained by deforming both ends 61 and 62 of a blank 60 having a rectangular cross section and a predetermined length in the width direction indicated by an arrow A. On the other hand, when the end portions 61 and 62 are deformed in the height direction indicated by the arrow B, the third and fourth conductor segments 55 are obtained.
[0039]
According to the second embodiment, in addition to the effects of the first embodiment, the effect of reducing the manufacturing cost of the first and second conductor segments 50 and the third and fourth conductor segments 55 can be obtained.
<Third embodiment>
The third embodiment shown in FIG. 7 is applied to a stator core 65 having a relatively high operating voltage, and four conductor segments 70, 74, 78 and 82 in one slot 66, that is, eight receiving portions 71, 72, 75, The point that 76, 79, 80, 83 and 84 are accommodated is different from the first embodiment.
[0040]
The cross-sectional shape of the receiving portions 71 and 72 of the first and second conductor segments 70 on the most open side is substantially square, and the cross-sectional shape of the receiving portions 75 and 76 of the second third and fourth conductor segments 74 has a width. It has a rectangular shape slightly larger than the thickness. The cross-sectional shape of the receiving portions 79 and 80 of the fifth and sixth conductor segments 78 from the opening side is a rectangular shape whose width is considerably larger than the thickness, and accommodates the seventh and eighth conductor segments 82 on the innermost side. The cross-sectional shape of the parts 83 and 84 is a rectangular shape whose width is much larger than its thickness. As described above, the eight accommodating portions 71 to 84 have different cross-sectional shapes every two. However, the cross-sectional areas of the four types of storage sections 71, 75, 79, 83, etc. are all equal.
[0041]
According to the third embodiment, in addition to the effect of the first embodiment, the length of the stator core 65 is large, and one or other of the eight conductor segments 70, 74, 78 and 82 is accommodated in each slot 66. Since the parts 71 to 84 are accommodated, larger power generation characteristics can be obtained as compared with the first embodiment and the like.
[0042]
When the eight conductor segments 70 to 82 are accommodated in the stator core 21 having the same inner and outer diameters as in the first embodiment, the cross-sectional area of each of the accommodating portions 71 to 84 is set to the conductor segment 30 of the first embodiment. , 40, 130 and 140 may be smaller than the cross-sectional area of the accommodating portions 33, 44, 133 and 144 and the like.
[0043]
【The invention's effect】
As described above, according to the stator of the rotating electric machine according to the first invention and the second invention, the depth of the slot in which the conductor segment is accommodated can be made smaller than that of the conventional example, so that the outer diameter of the stator core and hence the stator can be reduced. The size can be reduced. Moreover, if the width of the shallow slot on the back side is widened and the cross-sectional shape of the housing portion of the conductor segment housed in this portion is a rectangular shape whose width is longer than the thickness, power generation characteristics equivalent to those of the conventional example can be obtained. Can be.
[0044]
According to the second aspect of the present invention, the width of the tip of the tooth portion is increased, which is convenient for forming a magnetic circuit. According to the stator of the fourth aspect, it is possible to prevent the power generation characteristic of the joint on the back side of the slot from being lowered. According to the stator of the fifth aspect, two joints having a desired cross-sectional shape can be manufactured by one conductor segment.
[0045]
According to the stator of the sixth aspect, the slot of the stator core has a shape suitable for accommodating the joint portion, and the tooth portion has a shape suitable for forming the slot and the magnetic circuit. According to the stator of the seventh aspect, it is easy to manufacture two conductor segments. According to the stator of the eighth aspect, the power generation characteristics of all the conductor segments can be made equal.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a main part of an alternator including a first embodiment of the present invention.
FIG. 2 is a sectional view taken along a line 2-2 in FIG.
FIG. 3 is a front view of a conductor segment in FIG. 2;
FIG. 4 is an explanatory diagram showing an inner peripheral surface of a stator core expanded in a band shape for explaining a joining relationship of conductor segments in each slot in the first embodiment.
FIG. 5 is a sectional view showing a second embodiment of the present invention and corresponding to FIG.
FIG. 6 is an explanatory view showing a method of manufacturing a conductor segment from a material according to a second embodiment.
FIG. 7 is a sectional view, corresponding to FIG. 2, showing a third embodiment of the present invention.
FIG. 8 is a cross-sectional view showing an embodiment of a storage section of the present invention. FIG. 9 is a cross-sectional view of a main part showing a conventional example.
[Explanation of symbols]
10: Housing 16: Rotor 20: Stator 21: Stator core 22: Annular part 23: Tooth part 26: Slot 30: First conductor segment 31: U-turn part 33, 34: Housing part 36, 37: Joint part 40: Second part Conductor segment 41: U-turn part 43, 44: accommodation part 46, 47: joint part 49: stator coil

Claims (8)

A stator core having an annular portion and a plurality of teeth projecting inward from an inner peripheral surface of the annular portion to define a plurality of slots;
A U-shaped turn part at one end, a pair of joint parts at the other end, and a plurality of conductor segments having a pine needle shape including a pair of intermediate storage parts housed in the slots, ,
The circumferential length on the back side of each slot is longer than the circumferential length on the opening side, and the width of the housing portion on the back side and the width of the housing portion on the opening side correspond to the circumferential length of the slot. A stator for a rotating electric machine, comprising: 2. The stator according to claim 1, wherein a circumferential length of each tooth portion is constant from a tip side to a root side. 3. A stator core having an annular portion and a plurality of teeth projecting inward from an inner peripheral surface of the annular portion to define a plurality of slots;
A U-shaped turn part at one end, a pair of joint parts at the other end, and a plurality of conductor segments having a pine needle shape including a pair of intermediate storage parts housed in the slots, ,
The thickness of the accommodation portion on the back side of the slot is shorter than the thickness of the accommodation portion on the opening side, and the length in the radial direction of the slot corresponds to the accommodation portion at the innermost portion. Electric machine stator. The width of the accommodation portion on the back side of the slot is longer than the width of the accommodation portion on the opening side, and the interval between the pair of side wall surfaces of the slot corresponds to the width of the plurality of accommodation portions. 4. The stator of the rotating electric machine according to 3. The stator according to claim 4, wherein each of the two adjacent storage portions in the slot has the same square cross section or rectangular cross section. The stator according to claim 5, wherein the two receiving portions of the conductor segment closest to the opening have a square cross section, and the other two receiving portions of the other conductor segment have a rectangular cross section having a width longer than a thickness. . The two accommodating portions of the first conductor segment on the opening side and the two accommodating portions of the second conductor segment on the back side have the same rectangular cross section, and the accommodating portion of the first conductor segment has a long side. 6. The stator according to claim 5, wherein the second conductor segment is oriented in the radial direction of the slot, and the receiving portion of the second conductor segment has its long side oriented in the circumferential direction. The stator according to claim 6, wherein all of the plurality of housing portions have the same cross-sectional area.

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