CN116961291A - Stator punching structure, high-speed motor stator and high-speed motor - Google Patents

Abstract

The application discloses a stator punching structure, a high-speed motor stator and a high-speed motor, wherein the stator punching structure comprises a plurality of internal teeth distributed along the circumferential direction and a yoke part connected with the outer ends of the internal teeth, a stator groove is formed between every two adjacent internal teeth, first grooves are formed on two sides of each internal tooth, two opposite first grooves in the stator groove form clamping parts, the clamping parts divide the stator groove into a wire embedding groove block and a ventilation groove section, the wire embedding groove section is used for winding a stator winding, the clamping parts are used for clamping slot wedges to fix the stator winding in the wire embedding groove block, and the ventilation groove section is used for ventilation and heat dissipation. The outside cooling gas can flow through from the inboard of stator towards sheet structure, not only can cool off the inboard of stator towards sheet structure, winding, can cool off the electronic rotor simultaneously, has good ventilation volume, and the clamping portion forms through the form of stator towards sheet local fluting, realizes the division to the stator groove simultaneously to can not influence the size of wiping mouthful size in stator groove, the stator rule of being convenient for.

Description

Stator punching structure, high-speed motor stator and high-speed motor

Technical Field

The application relates to the technical field of motors, in particular to a stator punching structure, a high-speed motor stator and a high-speed motor.

Background

The high-speed motor has the advantages of small volume, high rotating speed, high power density and the like, has wide application in the fields of high-speed centrifugal compressors, energy storage flywheels and the like, and considers that the insulation reliability winds more fiber insulation belts on the end faces of windings, so that the effective cooling of the end windings of the motor is a difficult point in the industry.

Disclosure of Invention

The application mainly aims to provide a stator punching structure, a high-speed motor stator and a high-speed motor, and aims to realize cooling of the inner side and the outer side of a winding, so that the cooling effect is improved.

In order to achieve the above-mentioned objective, the present application provides a stator punching structure, which includes a plurality of internal teeth distributed along a circumferential direction and a yoke portion connecting outer ends of the plurality of internal teeth, wherein a stator slot is formed between every two adjacent internal teeth, two sides of each internal tooth are provided with first grooves, two opposite first grooves in the stator slot form clamping portions, the clamping portions divide the stator slot into a wire embedding slot section and a ventilation slot section, the wire embedding slot section is used for winding a stator winding, the clamping portions are used for clamping slot wedges to fix the stator winding in the wire embedding slot section, and the ventilation slot section is used for ventilation and heat dissipation.

Optionally, the internal teeth and the yoke are integrally formed.

Optionally, the stator punching structure further includes a plurality of external teeth spaced on one side of the yoke facing away from the internal teeth, an external groove is formed between every two adjacent external teeth, a portion of the external groove, which is close to the internal teeth, is used for winding a stator winding, and the rest is a ventilation part for ventilation and heat dissipation; or alternatively, the process may be performed,

and one side of the yoke part, which is opposite to the inner teeth, is concavely provided with a plurality of ventilation parts which are distributed at intervals, and the ventilation parts are used for ventilation and heat dissipation.

Optionally, the outer slot is opposite to the direction of the inner tooth and forms a first slot section and a second slot section with sequentially reduced slot widths, the second slot section is a ventilation part for ventilation and heat dissipation, and the first slot section is used for winding the stator winding.

Optionally, each of the internal teeth includes a first tooth segment and a second tooth segment detachably disposed along a radial direction of the stator lamination, and the first tooth segment and the yoke are integrally formed;

one of the first tooth segment and the second tooth segment is provided with the first groove, or the first tooth segment and the second tooth segment are spliced to form the first groove.

Optionally, one of opposite side ends of the first tooth segment and the second tooth segment is provided with a protruding portion, and the other is provided with a groove portion, and the protruding portion and the groove are matched to connect the first tooth segment and the second tooth segment.

Optionally, the width of the wire inserting groove section and/or the ventilation groove section is tapered along a direction away from the yoke.

The application also proposes a stator for a high-speed motor, comprising:

a plurality of stator punching structures which are axially stacked and fixed;

the stator winding is at least partially wound in the coil inserting groove sections of the plurality of stator punching structures;

the slot wedges are clamped and fixed in clamping parts of the stator punching structures.

Optionally, the stator winding includes a straight line section extending along an axial direction and two inclined sections which are respectively arranged at two ends of the straight line section and extend along a direction away from each other along a center of the stator punching structure, the straight line section is positioned in a plurality of coil inserting groove sections, and the two inclined sections are exposed out of a plurality of stator punching structures.

The application also proposes a high-speed motor comprising:

the motor comprises a motor shell, wherein two opposite sides of the motor shell are respectively provided with an air inlet and an air outlet;

the motor rotor is arranged in the motor shell and can rotate along the axial direction of the motor rotor;

the high-speed motor stator is positioned in the motor shell and sleeved on the outer side of the motor rotor, an air gap is formed between the high-speed motor stator and the motor rotor, and the air inlet, the air gap, the ventilation groove section of the high-speed motor stator and the air outlet are communicated to form a first cooling flow path.

Optionally, the stator punching structure further includes a plurality of external teeth spaced on one side of the yoke facing away from the internal teeth, an external groove is formed between every two adjacent external teeth, a portion of the external groove, which is close to the internal teeth, is used for winding a stator winding, and the rest is a ventilation part for ventilation and heat dissipation; or alternatively, the process may be performed,

a plurality of ventilation parts which are distributed at intervals are concavely arranged on one side of the yoke part, which is opposite to the inner teeth, and the ventilation parts are used for ventilation and heat dissipation;

the air inlet, the ventilation parts and the air outlet are communicated to form a second cooling flow path.

According to the technical scheme, through the design of the ventilation groove section of the stator punching sheet, the ventilation air passage can be formed on the inner side of the stator punching sheet structure, which is matched with the motor rotor, when external cooling air enters the motor, the cooling air can flow through gaps on the inner side of the stator punching sheet structure and the ventilation groove section respectively, meanwhile, the stator punching sheet structure, the motor rotor and the stator winding are cooled, heat generated by eddy current loss on the motor rotor and heat of the stator winding can be taken away, the cooling area on the inner side is increased through the design of the ventilation groove section, so that the cooling flow is larger, the full cooling of the motor rotor is facilitated, the clamping part is formed in a form of partial slotting of the stator punching sheet, the slot wedge is clamped for tightly pressing the stator winding, so that the close contact between copper wires of the winding is realized, the heat conductivity of the winding is improved, meanwhile, the division of the stator slot is realized, the size of a wiping opening of the stator slot is not influenced, and the stator coil is convenient for embedding.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an embodiment of a high-speed motor according to the present application;

FIG. 2 is a schematic cross-sectional view of the high-speed motor of FIG. 1;

FIG. 3 is a partial schematic view of a first embodiment of the stator lamination structure of FIG. 1;

FIG. 4 is a partial schematic view of the stator lamination structure of FIG. 3 mated with a stator winding;

FIG. 5 is a partial schematic view of a second embodiment of the stator lamination structure of FIG. 1;

FIG. 6 is a partial schematic view of a third embodiment of the stator lamination structure of FIG. 1;

fig. 7 is a partial schematic view of the stator lamination structure of fig. 6 mated with a stator winding.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				1000	High-speed motor	42	Groove portion
100	Stator punching structure	5	External teeth
				1	Internal teeth	51	Outer groove
11	First tooth segment	200	Motor shell
				12	Second tooth segment	201	Liquid cooling channel
2	Yoke part	300	Motor rotor
				21	Ventilation part	400	Stator winding
3	Stator groove	401	Straight line segment
				31	First groove	402	Inclined section
3a	Wire embedding groove block	500	Slot wedge
				3b	Ventilating slot section	a	Air gap
41	Raised portion

The achievement of the objects, functional features and advantages of the present application will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the case where a directional instruction is involved in the embodiment of the present application, the directional instruction is merely used to explain the relative positional relationship, movement condition, etc. between the components in a specific posture, and if the specific posture is changed, the directional instruction is changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

The high-speed motor has the advantages of small volume, high rotating speed, high power density and the like, has wide application in the fields of high-speed centrifugal compressors, energy storage flywheels and the like, and considers that the insulation reliability winds more fiber insulation belts on the end faces of windings, so that the effective cooling of the end windings of the motor is a difficult point in the industry.

Meanwhile, when the coil inserting fixation of the winding is considered, the notch size of the stator slot is usually required to be designed to be smaller, and the arrangement mode increases the manufacturing difficulty of the stator.

In view of this, the present application provides a stator lamination structure, a high-speed motor stator and a high-speed motor, and fig. 1 to 7 are embodiments of the high-speed motor provided by the present application.

Referring to fig. 1 to 2, the high-speed motor 1000 may include a motor housing 200, a motor rotor 300, and a high-speed motor stator, wherein two opposite sides of the motor housing 200 are respectively provided with an air inlet and an air outlet, and the motor rotor 300 is disposed in the motor housing 200 and can rotate along an axial direction thereof; the high-speed motor stator is positioned in the motor shell 200 and sleeved on the outer side of the motor rotor 300, an air gap a is formed between the high-speed motor stator and the motor rotor 300, and the air inlet, the air gap a, the ventilation groove section 3b of the high-speed motor stator and the air outlet are communicated to form a first cooling flow path.

Specifically, the cool air in the first cooling flow path enters from the air inlet and flows out from the air outlet after passing through the air gap a and the plurality of ventilation slot sections 3b of the stator lamination structure 100, i.e. corresponds to the flow direction indicated by the solid arrow in fig. 1, at this time, heat generated by eddy current loss on the motor rotor 300 and heat of the stator winding 400 in the stator slot 3 and heat of the stator winding 400 outside the stator lamination structure 100 and near the motor rotor 300 are taken away in the cooling air circulation process in the first cooling flow path. Therefore, the larger cooling flow of the first cooling flow path can be ensured, and the high-speed motor stator and the motor rotor 300 can obtain better cooling effect.

The cool air in the cooling passage may be provided by an independent cooling fan provided outside the motor, or may be provided by a coaxial cooling impeller provided at the end of the motor rotor 300, so long as the cool air can enter from one end in the circumferential direction of the motor rotor 300 and flow out from the other end. The application is not limited in this regard.

Specifically, the stator of the high-speed motor may include a plurality of stator lamination structures 100, stator windings 400 and slot wedges 500 that are axially stacked and fixed, and the stator windings 400 are at least partially wound in a plurality of wire embedding slot segments 3a of the plurality of stator lamination structures 100; the slot wedge 500 is snap-fit to a plurality of clips of the plurality of stator lamination structures 100.

The specific structural form of the stator winding 400 may be different based on the different height motor structures, and in the embodiment of the present application, the stator winding 400 includes a straight line segment 401 extending along the axial direction of the motor rotor 300, and two inclined segments 402 disposed at both ends of the straight line segment 401 and extending toward the opposite direction of the motor rotor 300 away from each other, the straight line segment 401 being located in the plurality of wire-embedding groove segments 3a, and the two inclined segments 402 being exposed to the stator punching structure 100. The straight line section 401 is convenient for install the cooperation, and two slope sections 402 can play the effect of water conservancy diversion simultaneously for the air conditioning flows along its extending direction, reaches abundant radiating purpose.

Referring to fig. 3 to 4, the stator punching structure 100 may include a plurality of internal teeth 1 distributed along a circumferential direction and a yoke 2 connected to outer ends of the plurality of internal teeth 1, a stator slot 3 is formed between every two adjacent internal teeth 1, two sides of each internal tooth 1 have first grooves 31, two opposite first grooves 31 in the stator slot 1 form a clamping portion separating the stator slot 3 to form a wire embedding slot section 3a and a ventilation slot section 3b, the wire embedding slot section 3a is used for winding the stator winding 400, the clamping portion is used for clamping a slot wedge 500 to fix the stator winding 400 in the wire embedding slot section 3a, and the ventilation slot section 3b is used for ventilation and heat dissipation.

In the present embodiment, the number of internal teeth 1 can be set by those skilled in the art according to the actual needs of the motor, and the number of internal teeth 1 is related to the number of poles, the number of phases of the motor stator winding 400, and the power level and the stator core inner diameter of the motor. The more the number of poles and phases, the more the number of internal teeth 1; the larger the motor power and the stator core inner diameter, the larger the number of internal teeth 1. The number of inner teeth can be selected from 12, 18, 24, 30, 36, etc., which can be specifically determined according to practical situations, and the embodiment of the present disclosure is not limited thereto.

In the present embodiment, the cross section of each internal tooth 1 may be the same, and it is understood that the cross section of the internal tooth 1 may be different according to the actual situation of the motor, which is not limited in the present embodiment.

In this embodiment, the cross section of the internal teeth 1 may be rectangular, calabash-shaped, and inverted T-shaped, but of course, may be other possible shapes, which may be specifically determined according to practical situations, and this embodiment is not limited thereto.

In the present embodiment, one end of the internal teeth 1 is connected to the yoke 2, and the other end is a part of the inner circumferential surface of the stator lamination. The inner teeth 1 may be provided with first grooves 31 on both sides, and preferably, the heights of the two first grooves 31 opposing each other in the same stator groove may be the same. The shape of the first groove 31 may match the shape of the wedge 500; or an interference fit where the size of the first recess 31 is slightly smaller than the outer dimensions of the slot key 500. Or a fixing structure enabling the first groove 31 and the wedge 500 to be engaged with each other is added to fix both so that the wedge 500 can be fixed.

In the present embodiment, the position of the first groove 31 on the internal teeth 1 may be determined according to the actual winding condition of the stator winding 400, which is not limited in the present embodiment.

In this embodiment, through the design of the ventilation slot section 3b of the stator punching sheet, the whole stator punching sheet structure 100 and the inner side of the motor rotor 300 form a ventilation air passage, when external cooling gas enters the motor, the external cooling gas can flow through the gap of the stator punching sheet structure 100 and the inner side of the ventilation slot section 3b respectively, heat generated by eddy current loss on the motor rotor 300 and heat of the stator winding 400 can be taken away, meanwhile, the design of the ventilation slot section 3b increases the cooling area of the inner side, so that the cooling flow is larger, the full cooling of the motor rotor 300 is facilitated, the clamping part is formed in a form of partial slotting of the stator punching sheet structure 100, the slot wedge 500 is clamped to compress the stator winding 400, so that the close contact between winding copper wires is realized, the heat conductivity of the winding is improved, and meanwhile, the division of the stator slot 3 is realized, so that the size of the wiping opening of the stator slot 3 is not influenced, and the stator coil is convenient. And the provision of the groove can effectively reduce the area of the stator slot 3 as compared with the provision of the protrusion structure to fix the slot wedge 500, thereby shortening the radial length of the stator slot 3.

It should be noted that the present application is not limited to the specific shape of the ventilation slot section 3b, and the cross section thereof may be a regular or irregular shape.

In some embodiments, the plurality of internal teeth 1 and the yoke 2 may be integrally formed, in other embodiments, the stator punching structure 100 may be a split design, for example, the plurality of internal teeth 1 are divided into two groups that are staggered, one group is connected with the yoke 2 into a whole, and the other group is assembled with the yoke 2, so that the size of each stator slot 3 can be regulated; alternatively, the plurality of internal teeth 1 are assembled with the yoke 2. The specific determination may be determined according to the actual situation, and the embodiment of the present specification is not limited thereto.

In one embodiment, referring to fig. 5, each internal tooth 1 may include a first tooth segment 11 and a second tooth segment 12 that are detachably disposed along a radial direction of the stator lamination structure 100, where the first tooth segment 11 and the yoke 2 are integrally formed, and one of the first tooth segment 11 and the second tooth segment 12 is provided with a first groove 31, or the first tooth segment 11 and the second tooth segment 12 are spliced to form the first groove 31.

In this embodiment, the yoke 2 and the first tooth segment 11 enclose to form the slot segment 3a, when the first groove 31 is disposed on the first tooth segment 11, the first groove 31 may be directly located at the edge of the first tooth segment 11, at this time, the ventilation slot segment 3b may be obtained after the second tooth segment 12 is assembled, or the first groove 31 may be disposed at the middle position of the first tooth segment 11, at this time, after the first tooth segment 11 forms the slot segment 3a, a part that may form the ventilation slot segment 3b remains, and after the second tooth segment 12 is assembled, the complete ventilation slot segment 3b is obtained. In other embodiments, the first groove 31 may be disposed on the second internal tooth 12, where the wire embedding groove segment 3a is formed by independently enclosing the first tooth segment 11 or by enclosing the first tooth segment after assembling with the second tooth segment 12, it is understood that when the first groove 31 is formed by assembling the first tooth segment 11 and the second tooth segment 12, the first tooth segment 11 defines the wire embedding groove segment 3a, and the second tooth segment 12 defines the ventilation groove segment 3b.

In one embodiment, the stator of the high-speed motor may include a plurality of stator lamination structures 100 stacked, and may be stacked by a plurality of sheet structures, or may be a block structure with a certain thickness, which is not limited in the present application.

Referring to fig. 5, in this embodiment, first, an assembly structure formed by stacking a plurality of punching sheets formed by combining the yoke 2 and the first tooth segment 11 is used to insert the stator winding 400, and the slot width of the stator slot 3 is large, so that the operability of the wire inserting process is high, after the wire inserting is completed in each stator slot 3, the slot wedge 500 is filled in the clamping portion, so as to compress the stator winding 400, and then the second tooth segment 12 which can be spliced is spliced, thus completing the manufacturing of the spliced stator. It should be understood that there is a first assembly of a plurality of first tooth segments 11 and a yoke 2 in this structure, and a single second tooth segment 12, the first assembly being obtainable by stacking a plurality of stator laminations 100, the single second tooth segment 12 also being obtainable by stacking laminations, or each second tooth segment 12 being an integral part having a thickness, cooperating with the stacked first assembly, the application being not limited in this respect.

Considering that the wire inserting groove section 3a is required to be designed for the stator winding 400, there is a certain requirement for the size, and the ventilation groove section 3b is only required to ensure ventilation, therefore, when the part of the single internal tooth 1 is in a spliced arrangement, the first groove 31 is preferably arranged on the first internal tooth 1 to ensure the stable shape of the wire inserting groove section 3 a.

In order to ensure the alignment of the assembly based on the split structure, in some embodiments, one of the opposite side ends of the first tooth segment 11 and the second tooth segment 12 is provided with a protrusion 41, and the other is provided with a groove 42, and the protrusion 41 is inserted into the groove 42. So that the positive mounting is realized by the matching form of the protrusion and the groove to connect the first tooth segment 11 and the second tooth segment 12. It should be understood that the protruding portion 41 may be provided on the first internal tooth 1 or on the second internal tooth 1, and the groove portion 42 may be designed correspondingly, which does not affect the assembly effect.

In order to not limit the specific shapes of the protruding portion 41 and the recessed portion 42 in the present application, the protruding portion 41 may have a regular shape such as a hemispherical shape, a square shape, or an irregular shape, and the recessed portion 42 may be correspondingly adapted.

Further, the motor housing 200 of the present application is preferably a high thermal conductivity, lightweight aluminum alloy material. The magnetic steel of the motor rotor 300 is preferably samarium cobalt or neodymium iron boron high-grade materials, and the stator punching structure 100 is made of silicon steel sheets, preferably low-loss coefficient silicon steel sheets with the thickness of about 0.2 mm.

In some embodiments, the width of the wire insertion slot section 3a and/or the ventilation slot section 3b may taper in a direction away from the yoke 2. That is, the sizes of the coil inserting groove section 3a and the ventilation groove section 3b may be the same or different, in this embodiment, the whole width of the stator groove 3 is tapered along the direction opposite to the yoke 2, that is, the width of the coil inserting groove section 3a and the ventilation groove section 3b are tapered along the direction opposite to the yoke 2, and the width of the ventilation groove section 3b is smaller than the width of the coil inserting groove section 3 a.

In other embodiments, the ventilation slot section 3b may be provided with a slot width that increases and decreases in a direction away from the yoke 2, which is not limited in the present application.

To reduce the effect of the spatial distortion of the magnetic field on the permanent magnet rotor, the slot width of the ventilation slot section 3b may be 1.5mm to 3mm. It will be understood, of course, that the slot width of the ventilation slot section 3b may also be designed to other values according to the actual situation, which is not limited in this embodiment of the present description. The notch of the stator slot 3 is provided toward the motor rotor 300. The size definition of the slot width is not affected by the profile of the ventilation slot section 3b.

It should be noted that the width dimension referred to in the present application is a dimension along the circumferential direction of the stator lamination structure 100.

To achieve the effect of ventilation outside the stator lamination 100, in some embodiments, the stator lamination 100 may further include a plurality of external teeth 5 spaced apart from one side of the yoke 2 facing away from the internal teeth 1, and an external slot 51 is formed between every two adjacent external teeth 5, and the back wound stator winding is wound on the side of the external slot 51 facing the internal teeth 1, but the external slot 51 is not filled, and a part of space is left as a ventilation portion 21 for ventilation and heat dissipation; in other embodiments, a plurality of ventilation portions 21 are concavely formed on the side of the yoke 2 facing away from the internal teeth 1, and the ventilation portions 21 are used for ventilation and heat dissipation.

In the embodiment in which the outer slots 51 are formed, the number of the outer teeth 5 can be set by a person skilled in the art according to the actual needs of the motor, and the number of the outer teeth 5 is related to the number of poles, the number of phases of the back wound motor stator winding 400, and the power level of the motor and the inner diameter of the stator core. The more the number of poles and phases, the more the number of external teeth 5; the larger the motor power and the stator core inner diameter, the greater the number of external teeth 5. The number of external teeth can be selected from 12, 18, 24, 30, 36, etc., which can be specifically determined according to practical situations, and the embodiment of the present disclosure is not limited thereto.

In this embodiment, the cross section of each external tooth 5 may be the same, and it will be understood that the cross section of the external tooth 5 may be different according to the actual situation of the motor, which is not limited in this embodiment.

In this embodiment, the cross section of the external teeth 5 may be rectangular, a calabash-shaped and inverted-T-shaped, and of course, other possible shapes may be also used, which may be specifically determined according to practical situations, and the embodiment of the present disclosure is not limited thereto.

Meanwhile, the cross-sectional shape of the external teeth 5 may be the same as or different from that of the internal teeth 1. The number of the external teeth 5 may be the same as or different from the number of the internal teeth 1, and the external teeth 5 and the internal teeth 1 may be aligned in the radial direction of the punched sheet or may be offset, which is not limited in the embodiment of the present specification.

Based on the external shape of the stator lamination 100, the ventilation portion 21 may have different forms, in the above two structural forms, the effect of ventilation on the outer side can be achieved, specifically, when the external cooling gas enters the motor, the external cooling gas can pass through the air gap a on the inner side, the ventilation slot section 3b and the ventilation portion 21 on the outer side at the same time, so that cooling without dead angle can be achieved on the inner side and the outer side of the winding.

In some embodiments, the stator lamination structure 100 may be applied to a back wound motor stator as well, and referring to fig. 6 to 7, the outer slots 51 form first slot segments and second slot segments with sequentially reduced slot widths facing away from the inner teeth 1, the second slot segments are used for ventilation and heat dissipation, and the first slot segments are used for stator winding installation. At this time, the ventilation and heat dissipation of the outer side of the inner winding type stator winding 400 and the ventilation and heat dissipation of the back winding type stator winding 400 are simultaneously realized, the back winding type motor becomes a research hot spot of the high-speed motor 1000 due to small end part size, the effective heat dissipation is also an industrial difficulty, and the difficult problem of heat dissipation of the back winding type motor can be solved by the cooling mode under the structural design.

It should be understood that the specific shape of the ventilation portion 21 is not limited, and the cross section thereof may be a regular or irregular shape.

Based on the structure of the ventilation portion 21 provided outside, the air inlet, the plurality of ventilation portions 21, and the air outlet communicate to form a second cooling flow path. At this time, based on the structural design of the stator lamination, the cooling channels are divided into two, the cool air of the first cooling flow path flows out from the air inlet into the air gap a and the plurality of ventilation slot sections 3b of the stator lamination structure 100, and corresponds to the flow direction indicated by the solid arrows in fig. 1, the cool air of the second cooling flow path flows out from the air outlet from the air inlet into the plurality of ventilation sections 21 of the stator lamination structure 100, i.e. corresponds to the flow direction indicated by the hollow arrows in fig. 1, and at this time, the cool air in the second cooling flow path is mainly used for cooling the heat of the stator winding 400 located outside the stator lamination structure 100 and facing away from the motor rotor 300, thereby realizing the cooling of the inner side and the outer side of the stator winding 400.

Furthermore, a plurality of liquid cooling passages 201 may be formed in the side wall of the motor case 200, and each of the liquid cooling passages 201 is filled with a cooling liquid for cooling the core loss generated in the internal teeth 1 and the yoke 2 in the stator lamination 100. Namely, in the embodiment, the heat dissipation is realized by adopting a mode of combining liquid cooling and air cooling. The present application is not limited to the winding direction of the liquid cooling passages 201, and the plurality of liquid cooling passages 201 may be circumferentially spaced along the motor rotor 300, circumferentially spaced along the motor housing 200, or circumferentially spaced along the motor rotor 300, and circumferentially spaced along the motor housing 200. Meanwhile, the plurality of liquid cooling channels 201 may be communicated with each other or may be independent of each other, and the lengths of the respective liquid cooling channels 201 may be the same or different.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the application, and all equivalent structural changes made by the specification and drawings of the present application or direct/indirect application in other related technical fields are included in the scope of the present application.

Claims (11)

1. The stator punching sheet structure is characterized by comprising a plurality of inner teeth distributed along the circumferential direction and a yoke part connected with the outer ends of the inner teeth, wherein a stator groove is formed between every two adjacent inner teeth, first grooves are formed on two sides of each inner tooth, two opposite first grooves in the stator groove form clamping parts, the clamping parts divide the stator groove into a wire embedding groove section and a ventilation groove section, the wire embedding groove section is used for winding a stator winding, the clamping parts are used for clamping slot wedges so that the stator winding is fixed in the wire embedding groove section, and the ventilation groove section is used for ventilation and heat dissipation.

2. The stator punching structure of claim 1, wherein the internal teeth and the yoke are integrally formed.

3. The stator punching structure according to claim 1, further comprising a plurality of external teeth provided at intervals on a side of the yoke facing away from the internal teeth, an external groove being formed between each adjacent two of the external teeth, a portion of the external groove adjacent to the internal teeth being used for winding a stator winding, and the remainder being a ventilation portion for ventilation and heat dissipation; or alternatively, the process may be performed,

and one side of the yoke part, which is opposite to the inner teeth, is concavely provided with a plurality of ventilation parts which are distributed at intervals, and the ventilation parts are used for ventilation and heat dissipation.

4. A stator punching structure as claimed in claim 3, wherein the outer slots form first and second slot segments of sequentially decreasing slot widths away from the inner tooth direction, the second slot segments being ventilation portions for ventilation and heat dissipation, the first slot segments being for winding stator windings.

5. The stator punching structure according to claim 1, wherein each of the internal teeth includes a first tooth segment and a second tooth segment detachably provided in a radial direction of the stator punching structure, the first tooth segment and the yoke being integrally formed;

one of the first tooth segment and the second tooth segment is provided with the first groove, or the first tooth segment and the second tooth segment are spliced to form the first groove.

6. The stator punching structure of claim 5, wherein one of opposite side ends of said first tooth segment and said second tooth segment is provided with a boss portion and the other is provided with a recess portion, said boss and said recess cooperating to connect said first tooth segment and said second tooth segment.

7. The stator punching structure according to any of claims 1 to 6, characterized in that a width of the wire insertion groove section and/or the ventilation groove section is tapered in a direction away from the yoke.

8. A stator for a high speed electric motor, comprising:

a plurality of stator lamination structures as defined in any one of claims 1 to 7 axially stacked and secured;

the stator winding is at least partially wound in the coil inserting groove sections of the plurality of stator punching structures;

the slot wedges are clamped and fixed in clamping parts of the stator punching structures.

9. The high speed motor stator as recited in claim 8 wherein said stator winding includes a straight line segment extending in an axial direction and two inclined segments disposed at opposite ends of said straight line segment and extending away from each other in a direction away from a center of said stator lamination, said straight line segment being disposed within a plurality of said rule slot segments, said two inclined segments being exposed at a plurality of said stator lamination.

10. A high speed motor, the high speed motor comprising:

the motor comprises a motor shell, wherein two opposite sides of the motor shell are respectively provided with an air inlet and an air outlet;

the motor rotor is arranged in the motor shell and can rotate along the axial direction of the motor rotor;

the high-speed motor stator according to any one of claims 8 to 9, being located in the motor housing and being sleeved on the outer side of the motor rotor, an air gap is formed between the high-speed motor stator and the motor rotor, and the air inlet, the air gap, the ventilation slot section of the high-speed motor stator and the air outlet are communicated to form a first cooling flow path.

11. The high-speed motor according to claim 10, wherein the stator lamination structure further comprises a plurality of external teeth arranged at intervals on one side of the yoke part facing away from the internal teeth, an external groove is formed between every two adjacent external teeth, a part of the external groove close to the internal teeth is used for winding a stator winding, and the rest is a ventilation part used for ventilation and heat dissipation; or alternatively, the process may be performed,

a plurality of ventilation parts which are distributed at intervals are concavely arranged on one side of the yoke part, which is opposite to the inner teeth, and the ventilation parts are used for ventilation and heat dissipation;

the air inlet, the ventilation parts and the air outlet are communicated to form a second cooling flow path.