WO2021166123A1

WO2021166123A1 - Stator, rotating electric machine, and compressor

Info

Publication number: WO2021166123A1
Application number: PCT/JP2020/006550
Authority: WO
Inventors: 義和藤末; 浩二矢部
Original assignee: 三菱電機株式会社
Priority date: 2020-02-19
Filing date: 2020-02-19
Publication date: 2021-08-26
Also published as: CZ2022320A3; CN115136454A; JPWO2021166123A1; JP7309031B2

Abstract

Provided are a stator, a rotating electric machine, and a compressor. The stator is obtained by winding a coil around a annular stator iron core with an insulating material interposed therebetween. The stator iron core is a linked multilayer iron core that includes a plurality of segment cores which are arranged so as to be annularly linked together and which include first and second segment cores that are disposed adjacent to each other and linked together. The plurality of segment cores are each formed by alternately layering a plurality of plate-shaped first and second members. The first and second members each have a yoke part having a linking section formed at one end thereof and a yoke end formed at the other end thereof. The linking sections of the yoke parts of the first members are each located at an end on the opposite side from a linking section of the yoke part of the second member. The linking sections of the first members of the first segment core are located and interposed between the linking sections of the second members of the second segment core, while abutting the yoke ends of the first members of the second segment core. The first and second segment cores are linked together in a manner that allows the first and second segment cores to freely rotate about the linking sections relative to each other. In addition, a tooth tip of the first segment core is in contact with or fitted with at least a portion of a tooth tip of the second segment core at two ends in the circumferential direction.

Description

Stator, rotary machine and compressor

The present disclosure relates to a stator, a rotary electric machine equipped with the stator, and a compressor equipped with the rotary electric machine, and particularly to a structure of a laminated iron core.

As a stator used in a conventional rotary electric machine, a predetermined number of iron core materials integrally provided with a short-sided yoke portion and a tooth portion protruding inward thereof are laminated to form a split core. After winding a coil around the tooth portion for each of the split cores, a plurality of the split cores are arranged in an annular shape, and the yoke portions and the tooth tip portions are butted against each other, or joined by welding, adhesion, or the like. It is known that a closed slot structure is formed by fixing the teeth. (See, for example, Patent Document 1)

The stator disclosed in Patent Document 1 includes an annular stator core composed of a plurality of dividing cores radially divided with reference to the center thereof, and a coil wound around the plurality of dividing cores via an insulating material. , Is configured. The plurality of divided cores wound with the coil are arranged in an annular shape in a state where adjacent yoke portions and tooth tip portions are abutted and joined to be fixed. As a result, the stator has a closed slot structure. After that, the joint portions between the yoke portions and the tooth tips are welded by laser welding (for example, YAG laser welding) or bonded by an adhesive.

In this way, the stator is fixed by winding the coils around the teeth of the plurality of split cores via insulating materials, and then joining and fixing the adjacent yokes and tooth tips of the plurality of split cores. By arranging in a ring shape in the state, it is configured as a closed slot structure. Therefore, the coil is quickly, easily, and densely wound around the teeth of each split core. In addition, not only the yokes of the split cores but also the tooth tips located on the inner peripheral side are joined and fixed to form a closed slot structure, so even if an electromagnetic force is applied to the split cores. , The deformation of the stator can be prevented. This makes it possible to realize a rotary electric machine with low noise and low vibration.

Japanese Unexamined Patent Publication No. 2004-180383

However, according to the conventional stator structure disclosed in Patent Document 1, the joint portions between the yoke portions and the tooth tips are bonded by laser welding or by an adhesive. Therefore, when the inner and outer diameters of the split cores are not sufficiently regulated at the time of welding or adhesion, there is a problem that the split cores are displaced from each other and the roundness of the inner and outer diameters of the stator is deteriorated.

In addition, there is a problem that the gap between the yoke portions and the tooth tips varies due to the shape variation between the divided cores.

The present disclosure has been made in order to solve the above-mentioned problems, and is provided with a high-density coil that has high bonding accuracy on the inner diameter side and the outer diameter side of the split core and is formed quickly and easily. It is an object of the present invention to provide a child, a rotary electric machine and a compressor.

The stator according to the present disclosure is a stator formed by winding a coil around an annular stator core via an insulating material, and the stator core includes a plurality of split cores, and the plurality of split cores are provided. Is a connected laminated iron core including a first divided core and a second divided core which are connected to each other adjacent to each other and are arranged to be connected in a ring shape, and each of the plurality of divided cores is at least partially plural. The plate-shaped first member and the second member are alternately laminated, and the first member and the second member have a connecting portion formed at one end and a yoke end at the other end. The yoke portion on which the A tooth tip portion integrally formed with the tip of the first member is provided, and the connecting portion of the yoke portion of the first member is located at an end portion of the yoke portion of the second member opposite to the connecting portion. The connecting portion of the first member of the first split core is located between the connecting portions of the second member of the second split core and is located between the connecting portions of the second member of the second split core. The first split core and the second split core are connected so as to be relatively rotatably around the connecting portion, and are positioned so as to be abutted against the yoke end portion of one member, and the teeth of the first split core. The tip portion is at least partially in contact with or fitted with the tooth tip portion of the second split core at both ends in the circumferential direction.

The rotary electric machine according to the present disclosure is equipped with the above stator.

Further, the compressor according to the present disclosure includes the rotary electric machine and a compression mechanism driven by the rotary electric machine to compress the refrigerant.

According to the present disclosure, the stator core has a so-called joint structure in which the constituent first split core and the second split core are rotatably connected at the connecting portion. As a result, the stator core is wound around the tooth portion and then made into an annular shape, so that a high-density coil can be installed quickly and easily. Further, the stator core has an improved positional accuracy between the divided cores due to the joint structure, and the tooth tips can be brought into contact with each other or fitted by rotating the first divided core and the second divided core relative to each other. Therefore, the variation in the gap between the tooth tips is reduced. Therefore, the stator core improves the accuracy of joining the divided cores on the inner diameter side and the outer diameter side.

It is explanatory drawing of the cross-sectional structure of the compressor 1 which concerns on Embodiment 1. FIG. It is a top view which shows the annular arrangement of the stator core 80 of the stator 51 of the electric motor part 50 which concerns on Embodiment 1. FIG. It is a top view of the 1st member 11 of the core piece 3 which constitutes the split core 5 of a stator core 80. FIG. 5 is a plan view of a second member 12 of the core pieces 3 constituting the divided core 5 of the stator core 80. It is an enlarged view of the connecting part 5b shown in FIG. FIG. 5 is an enlarged cross-sectional view of a connecting portion 5b of the stator core 80 according to the first embodiment. It is an enlarged view around the end portion 5e of the tooth tip portion 5c of FIG. It is a top view of the fixed state of the stator core 80 of the stator 51 and the housing 4. It is explanatory drawing of the positional relationship of the connecting part 5b of the split core 5 of the stator core 80 and the end face 5g of a tooth tip part 5c which concerns on Embodiment 1. FIG. It is an annular arrangement diagram of the stator core 280 in Embodiment 2. It is an enlarged view around the end face 205g of the tooth tip portion 205c of the stator core 80 of FIG.

Hereinafter, the stator, rotary electric machine, and compressor according to the first embodiment will be described with reference to drawings and the like. In the following drawings including FIG. 1, the relative dimensional relationships and shapes of the constituent members may differ from the actual ones. Further, in the following drawings, those having the same reference numerals are the same or equivalent thereof, and this shall be common to the entire text of the specification. In addition, terms that indicate directions (for example, "top", "bottom", "right", "left", "front", "rear", etc.) are used as appropriate for ease of understanding, but their notation is used as appropriate. , For convenience of explanation, it is described only as such, and does not limit the arrangement and orientation of the device or the constituent members. In the specification, the positional relationship between the constituent members, the extending direction of each constituent member, and the arrangement direction of each constituent member are, in principle, those when the device is installed in a usable state.

Embodiment 1.
FIG. 1 is an explanatory view of a cross-sectional structure of the compressor 1 according to the first embodiment. The compressor 1 shown in FIG. 1 is used to compress the refrigerant, for example, in a refrigeration cycle device. The compressor 1 includes a fluid sucked from the outside through a suction pipe 41 from a suction muffler 40, a compression mechanism unit 30 for compressing a gas refrigerant in the first embodiment, and an electric motor unit 50 for driving the compression mechanism unit 30. A closed container 60 for accommodating the compression mechanism unit 30 and the electric motor unit 50 is provided. The closed container 60 is a pressure vessel, and the high-pressure gas refrigerant compressed by the compression mechanism unit 30 is discharged from the compression mechanism unit 30 to the inside, and the high-temperature and high-pressure gas refrigerant is discharged from the discharge pipe 42 to the refrigerant circuit. Further, refrigerating machine oil (not shown) is stored in the inner bottom of the closed container 60.

The closed container 60 according to the first embodiment includes a body portion 61 having a cylindrical shape and a bottom portion, and an upper lid portion 62 that closes an opening above the body portion 61. The body portion 61 and the upper lid portion 62 are airtightly joined by circumferential welding. The structure of the closed container 60 shown in FIG. 1 is an example, and is not limited to this structure.

The electric motor unit 50 is located slightly above the center of the closed container 60, and includes a stator 51 and a rotor 52 arranged on the inner peripheral side of the stator 51. The outer peripheral surface of the stator 51 and the inner peripheral surface of the body portion 61 are fixed by welding, for example. Further, the stator 51 is formed in an annular shape. The rotor 52 is rotatably arranged with a slight gap between the rotor 52 and the inner peripheral surface of the stator 51.

The rotor 52 is fitted with a spindle 53 and rotates integrally with the spindle 53. An eccentric portion 54 is formed on one end of the main shaft 53 to serve as a crankshaft. The eccentric portion 54 is eccentric with respect to the central axis L of the main shaft 53, and the central axis C is at a position deviated from the central axis L. The eccentric portion 54 rotates eccentrically around the central axis L due to the rotation of the rotor 52.

The compression mechanism portion 30 is arranged so as to face the cylinder 20 and the upper and lower end surfaces of the cylinder 20, and the main bearing 31 and the sub bearing 32 that also serve as the end plates of the cylinder 20 and the rolling housed inside the cylinder 20. It has a piston 22 and. An eccentric portion 54 is fitted in the rolling piston 22. Further, in the vane groove (not shown) of the cylinder 20, a vane (not shown) that divides the internal space of the cylinder 20 into a suction chamber and a compression chamber is inserted. The cylinder 20, the main bearing 31, and the sub-bearing 32 are integrally combined, and the rolling piston 22, the cylinder 20, the eccentric portion 54, and the vane are movably housed therein. The internal component composed of the rolling piston 22, the cylinder 20, the eccentric portion 54, and the vane compresses the gas refrigerant sucked from the suction pipe 41 each time the main shaft 53 rotates, and discharges the gas refrigerant into the closed container 60. ..

Further, the compressor 1 includes a suction muffler 40 provided adjacent to the outside of the closed container 60. The suction muffler 40 stores the low-pressure refrigerant flowing through the refrigerant circuit and separates the refrigerant into gas and liquid. Further, the suction muffler 40 has a larger cross-sectional area than the refrigerant pipe, and reduces noise.

The compressor 1 guides the suction pipe 41 that sucks the gas refrigerant in the suction muffler 40 into the closed container 60 and the gas refrigerant sucked through the suction pipe 41 to the suction chamber in the cylinder 20 of the compression mechanism unit 30. It is provided with a suction hole (not shown). A discharge hole (not shown) for discharging the high-pressure gas refrigerant compressed in the compression chamber of the compression mechanism unit 30 into the space inside the closed container 60 is provided. The compressor 1 has a discharge pipe 42 at the upper end of the closed container 60 for discharging the high-pressure gas refrigerant in the closed container 60 to the outside, and sends the high-pressure gas refrigerant to the refrigerant circuit.

Here, the compression of the refrigerant by the compressor 1 will be described. In the compressor 1, the rotation of the rotor 52 causes the main shaft 53 integrated with the rotor 52 to rotate, and the eccentric portion 54 rotates with the rotation of the main shaft 53. As the eccentric portion 54 rotates, the rolling piston 22 rotates and slides inside the cylinder 20. That is, the rolling piston 22 rotates eccentrically along the inner peripheral surface of the cylinder 20. As a result, the gas refrigerant is sucked into the suction chamber in the cylinder 20 from the suction pipe 41, and the gas refrigerant is compressed in the compression chamber in the cylinder 20. The high-pressure gas refrigerant compressed in the compression chamber is discharged into the space inside the closed container 60, and is discharged from the discharge pipe 42 to the outside of the closed container 60.

In the stator 51, a coil 55 is formed by winding a conducting wire around a magnetic pole tooth 5a of the stator core 80 via an insulating material 57. The stator 51 generates a magnetic field by the current supplied from the wiring 56, and continuously changes the magnetic field to rotate the rotor 52. The rotor 52 rotates at a predetermined torque and rotation speed, and transmits a driving force to the spindle 53. That is, the stator 51 and the rotor 52 form an electric motor unit 50 that is a rotary electric machine that converts electrical energy into rotational driving force. The electric motor unit 50 transmits a driving force to the compression mechanism unit 30 via the main shaft 53 to compress the refrigerant.

FIG. 2 is a plan view showing an annular arrangement of the stator core 80 of the stator 51 of the electric motor unit 50 according to the first embodiment. FIG. 2 is a diagram illustrating an arrangement of each divided core 5 of the stator core 80 constituting the stator 51 according to the first embodiment. The stator core 80 includes a plurality of split cores 5. The plurality of divided cores 5 have both ends of their respective yoke portions 5d connected to adjacent divided cores 5. Further, the tooth tip portion 5c at the tip of the magnetic pole tooth 5a, which is provided so as to project from the yoke portion 5d of each divided core 5 toward the inner peripheral side, protrudes laterally with respect to the extending direction of the magnetic pole tooth 5a. It is configured so that the ends 5h of the tooth tip portions 5c of the adjacent split cores 5 are in contact with each other or are located with a small gap.

The plurality of split cores 5 forming the stator core 80 include a first split core 71 and a second split core 72. The first split core 71 and the second split core 72 are connected to each other next to each other. The first divided core 71 and the second divided core 72 are arranged next to each other, and are configured so that they can move in an arc around the engaging portion 3b. As described above, the connecting portion 5b between the first divided core 71 and the second divided core 72 has a so-called joint structure. The plurality of divided cores 5 are connected laminated iron cores formed by laminating and connecting a plurality of plate-shaped core pieces 3 made of a magnetic material.

FIG. 3 is a plan view of the first member 11 of the core pieces 3 constituting the divided core 5 of the stator core 80. FIG. 4 is a plan view of the second member 12 of the core pieces 3 constituting the divided core 5 of the stator core 80. Each of the plurality of divided cores 5 is formed by alternately laminating plate-shaped first member 11 and second member 12 at least in a part. In the first embodiment, the first member 11 and the second member 12 have a symmetrical shape with respect to the center c1 of the tooth portion 3a forming the magnetic pole teeth 5a of the split core 5.

The first member 11 and the second member 12 are located on the outer peripheral side of the stator core 80, and are included in the yoke portion 3d forming the yoke portion 5d of the split core 5 and the stator core 80 from the central portion of the yoke portion 3d. It has a tooth portion 3a protruding toward the peripheral side and a tooth tip portion 3c which is the tip of the tooth portion 3a. The tooth tip portion 3c has an end portion 3h protruding in the left-right direction with respect to the direction in which the tooth portion 3a extends from the yoke portion 3d, that is, in the circumferential direction of the stator core 80 in FIG. The end portion 3h is provided with an end face 3g at the tip end.

As shown in FIGS. 3 and 4, the yoke portion 3d of the first member 11 and the yoke portion 3d of the second member 12 have a symmetrical shape with respect to the center c1. The yoke portion 3d includes a connecting portion 3f at one end. In the connecting portion 3f, the edge portion 3fb of the corner portion 3fa on the outer peripheral side is rounded in an arc shape in a plan view. An engaging portion 3b is formed on the corner portion 3fa. The engaging portion 3b is formed so that one surface of the core piece 3, which is a plate-shaped magnetic material forming the first member 11 and the second member 12, is recessed and the other surface is projected. For example, the engaging portion 3b is formed by half-cutting a plate material.

FIG. 5 is an enlarged view of the connecting portion 5b shown in FIG. The connecting portion 3f of the core piece 3 constituting the connecting portion 5b is arranged so as to be abutted against the yoke end portion 3e of the adjacent split cores 5. The yoke end portion 3e has an arc-shaped arc portion 3ea corresponding to the shape of the corner portion 3fa of the connecting portion 3f. The arc portion 3ea is recessed in a shape in which the edge portion 3fb of the corner portion 3fa of the connecting portion 3f is offset. The arc portion 3ea and the edge portion 3fb do not interfere with each other when the first member 11 and the second member 12 rotate relative to each other about the center of the engaging portion 3b. However, the arc portion 3ea and the edge portion 3fb do not necessarily have to be concentric circles centered on the center of the engaging portion 3b, so that the first division core 71 and the second division core 72 can relatively rotate and move. It suffices if it is configured. In FIG. 5, at least one of the plurality of connecting portions 5b of the plurality of divided cores 5 is provided between the abutted connecting portion 3f and the yoke end portion 3e in the stator core 80 shown in FIG. It has a gap of 3k as shown in FIG.

FIG. 6 is an enlarged cross-sectional view of the connecting portion 5b of the stator core 80 according to the first embodiment. In the connecting portion 5b between the first divided core 71 and the second divided core 72 forming the stator core 80, the first member 11 and the second member 12 are alternately overlapped with each other, and the first divided core 71 is the first. The connecting portion 3f of the 1 member 11 is located sandwiched between the connecting portions 3f of the two second members 12 of the second split core 72. The connecting portion 3f of the first member 11 of the first divided core 71 is positioned so as to be abutted against the yoke end portion 3e of the first member 11 and the plate surface of the core piece 3 in a direction parallel to the plate surface.

As shown in FIG. 6, the engaging portion 3b includes a concave portion 3ba recessed in the direction perpendicular to one plate surface of the core piece 3 and a protruding convex portion 3bb. In the connecting portion 3f of the first split core 71 and the second split core 72, the convex portion 3bb of one engaging portion 3b fits into the concave portion 3ba of the other engaging portion 3b, and one first member 11 and the other The second members 12 are prevented from coming off in the direction parallel to the plate surface of the core piece 3. It is preferable that the concave portion 3ba and the convex portion 3bb are fitted with a gap so that the first divided core 71 and the second divided core 72 can rotate and move relatively. Since the engaging portion 3b is the rotation center of the joint structure that connects the first split core 71 and the second split core 72, it may also be referred to as a joint center. Further, a structure in which the adjacent first split core 71 and the second split core 72 can perform relative rotational movement around the engaging portion 3b may be referred to as a joint structure.

FIG. 7 is an enlarged view of the periphery of the end portion 5e of the tooth tip portion 5c of FIG. The ends 5e of the tooth tip 5c of the stator core 80 are connected to each other by abutting or fitting. That is, the tooth tip portions 5c of the first division core 71 are in contact with or fitted to at least a part of the tooth tip portions 5c of the second division core at both ends in the circumferential direction. By joining or adhering the tooth tip portions 5c to each other, the stator core 80 forms a stator 51 having a closed slot structure.

FIG. 8 is a plan view of the stator core 80 of the stator 51 and the housing 4 in a fixed state. In the stator core 80, after a plurality of split cores 5 are linearly connected, winding is performed on the magnetic pole teeth 5a of each split core 5. After that, each divided core 5 is arranged in a ring shape as shown in FIG. At this time, at least one of the plurality of connecting portions 5b of the plurality of divided cores 5 has a gap as shown in FIG. On the other hand, the end portions 5e of the tooth tip portions 5c of the plurality of divided cores 5 do not have gaps at all points. With such a structure, the stress applied to the connecting portion 5b of the yoke portion 5d of the stator core 80 from the housing 4 arranged outside the stator core 80 can be relaxed, and the deformation of the core can be suppressed. .. The housing 4 is, for example, the housing of the stator 51 or the closed container 60.

Further, the end portion 3h of the tooth tip portion 3c of the core piece 3 constituting the split core 5 has a thickness dimension in the radial direction in a state where a plurality of split cores 5 are arranged in an annular shape, that is, the material plate thickness of the core piece 3. It is set to be more than twice the thickness dimension in the central axis direction. Therefore, in the core piece 3, the influence of punching distortion due to the press is suppressed, and the end portions 3h of the tooth tip portions 3c are arranged in an appropriate positional relationship.

FIG. 9 is an explanatory diagram of the positional relationship between the connecting portion 5b of the split core 5 of the stator core 80 and the end face 5g of the tooth tip portion 5c according to the first embodiment. The end surface 5g of the tooth tip portion 5c of the stator core 80 is arranged on a concentric circle centered on the center of the engaging portion 3b of the core piece 3 forming the connecting portion 5b. Therefore, the stator core 80 can easily and highly accurately join the end faces 5g of the tooth tip portions 5c of the plurality of divided cores 5 after the magnetic pole teeth 5a are wound.

Further, the end face 5g of the tooth tip portion 5c of the stator core 80 is the case where there is no gap at all the end faces 3g of the core pieces 3 laminated in the central axis direction of the stator core 80, or there is a gap with the gapless portion. It is conceivable that the existing part and the existing part are mixed. When a portion without a gap and a portion with a gap are mixed, the magnetic flux is cut off at the tooth tip portion 3c of the portion without a gap. Further, the rigidity of the stator core 80 increases as the number of non-gap portions increases. Therefore, the deformation of the stator core 80 due to the force applied to the stator 51 is suppressed. As a result, vibration due to rotation of the electric motor unit 50 is reduced.

Further, when the stator 51 according to the first embodiment is mounted on the compressor 1, the flow path resistance of the refrigerant near the end surface 5 g of the tooth tip portion 5c of the plurality of divided cores 5 of the stator core 80 is lowered. Therefore, the retention of the refrigerating machine oil on the inner peripheral side of the stator 51 is eliminated, and the circulation of the refrigerating machine oil is improved inside the compressor 1. Further, by eliminating the retention of the refrigerating machine oil on the inner peripheral surface of the stator 51, the rotational load of the rotor 52 is reduced, which leads to the improvement of the efficiency of the electric motor unit 50. Further, since the circulation of the refrigerating machine oil is improved inside the closed container 60, the refrigerating machine oil is easily supplied to the compression mechanism portion 30, and deterioration due to wear or the like of the compression mechanism portion 30 can be suppressed.

Further, the stator 51 has the coil 55 wound around the magnetic pole teeth 5a of the plurality of divided cores 5 via the insulating material 57, and then collides with the yoke portions 5d and the tooth tips 5c of the plurality of divided cores 5. It is arranged in an annular shape in a state where it is joined and fixed by alignment or the like. As a result, the plurality of divided cores 5 form a stator 51 having a closed slot structure. Therefore, the coil 55 can quickly and easily wind the magnetic pole teeth 5a of each divided core 5, and enables high-density winding.

Embodiment 2.
In the second embodiment, the connecting structure of the tooth tip portion 5c of the stator core 80 of the stator 51 according to the first embodiment is changed. In the second embodiment, items not particularly described are the same as those in the first embodiment, and the same functions and configurations as those in the first embodiment are described by using the same reference numerals.

FIG. 10 is an annular arrangement diagram of the stator core 280 according to the second embodiment. FIG. 11 is an enlarged view of the periphery of the end face 205 g of the tooth tip portion 205c of the stator core 80 of FIG. The tooth tip portions 205c of the plurality of divided cores 205 of the stator core 80 according to the second embodiment are connected by combining the unevenness provided on the end surface 203g of the tooth tip portion 203c of each core piece 203.

A protruding portion 203p is provided on one end surface 203ga of the tooth tip portion 203c of the core piece 203. Further, the other end surface 203gb of the tooth tip portion 203c of the core piece 203 is provided with a recessed portion 203q into which the protruding portion 203p fits. The core pieces 203 forming the split core 5 of the stator core 280 have tooth tip portions 203c formed in the same shape. Since the stator core 280 is connected by combining unevenness like the tooth tip portion 203c, the fixing force between the tooth tip portions 205c of the split core 205 is improved, and the rigidity is improved. Therefore, the deformation of the stator core 280 due to the force applied to the stator 51 is suppressed. As a result, the electric motor unit 50 is further reduced in vibration due to rotation.

Each of the plurality of divided cores 205 may be formed only of the core piece 203, or may be formed by mixing the core piece 3 and the core piece 203 according to the first embodiment. In the case of the split core 205 formed by mixing the core piece 3 and the core piece 203, the tooth tip portion 205c of the split core 205 of the stator core 280 is a portion having a partial gap in the axial direction of the stator 51. And the part without a gap are mixed. With this configuration, the compressor 1 can appropriately set the gap between the tooth tip portions 205c of each split core 205, so that the compressor 1 can be adjusted to the target efficiency, noise, and vibration. At the same time, the rigidity of the stator 51 can be improved.

1 Compressor, 3 Core piece, 3a tooth part, 3b engaging part, 3ba concave part, 3bb convex part, 3c tooth tip part, 3d yoke part, 3e yoke end part, 3ea arc part, 3f connecting part, 3fa corner part, 3fb edge, 3g end face, 3h end, 4 housing, 5 split core, 5a magnetic pole tooth, 5b connection, 5c tooth tip, 5d yoke, 5f yoke end, 5g end face, 5h end, 11 first Member, 12 second member, 20 cylinder, 22 rolling piston, 30 compression mechanism, 31 main bearing, 32 auxiliary bearing, 40 suction muffler, 41 suction pipe, 42 discharge pipe, 50 electric motor part, 51 stator, 52 rotation Child, 53 spindle, 54 eccentric part, 55 coil, 56 wiring, 57 insulating material, 60 airtight container, 61 body, 62 upper lid, 71 1st division core, 72 2nd division core, 80 stator core, 203 core One piece, 203c tooth tip, 203g end face, 203ga end face, 203gb end face, 203p protruding part, 203q recessed part, 205 split core, 205c tooth tip part, 205g end face, 280 stator core, C central axis, L central axis, c1 center.

Claims

An annular stator A stator formed by winding a coil around an iron core via an insulating material.
The stator core is
With multiple split cores
The plurality of divided cores
Includes first and second split cores that are connected next to each other
It is a connected laminated iron core that is connected and arranged in a ring shape.
Each of the plurality of split cores
It is formed by alternately stacking a plurality of plate-shaped first members and second members in at least a part thereof.
The first member and the second member
A yoke portion with a connecting portion formed at one end and a yoke end formed at the other end, and a yoke portion.
A tooth portion that protrudes integrally with the yoke portion from the central portion of the yoke portion toward the inner peripheral side of the stator core, and a tooth portion.
A tooth tip portion integrally formed with the tip on the inner peripheral side of the tooth portion is provided.
The connecting portion of the yoke portion of the first member is
Located at the end of the second member opposite to the connecting portion of the yoke portion,
The connecting portion of the first member of the first split core
It is located between the connecting portions of the second member of the second split core.
Positioned so as to be abutted against the yoke end of the first member of the second split core.
The first split core and the second split core are relatively rotatably connected around the connecting portion.
The tooth tip portion of the first division core is
A stator in which at least a part of the tooth tip portion of the second split core is in contact with or is fitted at both ends in the circumferential direction.
The stator core is
The stator according to claim 1, wherein a gap is provided between the first member of the first split core and the first member of the second split core.
The ends of the tooth tips of the first member and the second member
The stator according to claim 1 or 2, wherein the thickness dimension of the stator core in the radial direction is at least twice the thickness dimension of the stator core in the central axis direction.
The connecting portion of the first member and the second member
It is provided with an engaging portion that forms a convex portion on one surface and a concave portion on the other surface.
A claim that the convex portion of the first member and the concave portion of the second member are fitted, and the convex portion of the second member is fitted and connected to the concave portion of the first member. The stator according to any one of 1 to 3.
The ends of the tooth tips of the first split core and the second split core
The stator according to claim 4, which is located on a concentric circle centered on the center of the engaging portion.
A rotary electric machine provided with the stator according to any one of claims 1 to 5.
A compressor comprising the rotary electric machine according to claim 6 and a compression mechanism driven by the rotary electric machine to compress the refrigerant.