CN112583142A

CN112583142A - Stator tooth, stator core, stator, motor and fan

Info

Publication number: CN112583142A
Application number: CN201910926244.5A
Authority: CN
Inventors: 武谷雨; 吴迪
Original assignee: Midea Welling Motor Technology Shanghai Co Ltd
Current assignee: Midea Welling Motor Technology Shanghai Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2021-03-30

Abstract

The invention provides a stator tooth, a stator core, a stator, a motor and a fan, wherein the stator tooth comprises: the tooth body is connected with a stator yoke part of the stator core and extends along the axial direction of the stator yoke part; and the tooth point is connected with the end face of the tooth body and comprises a plurality of sub-point parts, the plurality of sub-point parts are arranged along the radial direction of the stator core, and the adjacent sub-point parts are staggered with each other along at least one end face of the two ends of the circumferential direction of the stator core, so that the tooth point forms a step-shaped structure along at least one end of the circumferential direction of the stator core. The stepped end face can effectively improve the utilization rate of the rotor permanent magnet on one hand, so that the torque density of the motor is improved, and on the other hand, the flexibly variable multiple stator tooth laminations can effectively improve the back electromotive force of the motor and reduce the cogging torque of the motor through a certain optimization design method.

Description

Stator tooth, stator core, stator, motor and fan

Technical Field

The invention relates to the technical field of motors, in particular to a stator tooth, a stator iron core, a stator, a motor and a fan.

Background

In a conventional axial flux motor, tooth tip end faces of stators are generally flat faces, so that the distance between notches between adjacent tooth tips of the stators is increased along with the increase of the outer diameter of a yoke of the stator, the utilization rate of permanent magnets is reduced on one hand, and harmonic waves are introduced on the other hand, so that the sine degree of counter electromotive force is reduced, the cogging torque ripple is increased, and the application expansion of the axial motor is influenced.

Disclosure of Invention

In order to solve at least one of the above technical problems, a first object of the present invention is to provide a stator tooth of a stator core.

A second object of the present invention is to provide a stator core including the above-described stator teeth.

A third object of the present invention is to provide a stator including the above stator core.

A fourth object of the present invention is to provide an electric machine including the stator described above.

A fifth object of the present invention is to provide a fan including the above motor.

In order to achieve the above object, according to a first aspect of the present invention, there is provided a stator tooth of a stator core, comprising: the tooth body is connected with a stator yoke part of the stator core and extends along the axial direction of the stator yoke part; and the tooth point, with the terminal surface of tooth body links to each other, including two at least sub point portions, two at least sub point portions are followed stator core's radial arrangement, and adjacent sub point portion is followed at least one terminal surface at stator core circumference's both ends staggers each other, makes the tooth point is followed stator core circumference's at least one end forms the stairstepping structure.

The stator tooth provided by the technical scheme of the first aspect of the invention is suitable for an axial motor, the tooth tip of the stator tooth is divided into a plurality of sub-tip parts, and the plurality of sub-tip parts are arranged along the radial direction of the stator core, and at least one end surface of two ends of the adjacent sub-tip parts of the same stator tooth along the circumferential direction of the stator core is staggered with each other, so that the end surface of at least one end of the tooth tip along the circumferential direction of the stator core forms a step-shaped structure. Compared with a straight end face in the prior art, the stepped end face facilitates reasonable utilization of space between adjacent stator teeth according to the specific structure of the motor, so that the contact area between the stator teeth and the rotor permanent magnet is increased, the utilization rate of the rotor permanent magnet is improved, and the torque density of the motor is improved. Meanwhile, the width of each radial part of the notch between adjacent tooth tips on the stator core is conveniently and reasonably adjusted by utilizing the stepped end surface so as to reduce the introduction of harmonic waves, thereby effectively improving the back electromotive force of the motor, reducing the cogging torque of the motor and being beneficial to the application expansion of the axial motor.

In addition, because the stator tooth has certain thickness, can adopt a plurality of stator punching sheets to fold along its thickness direction and press the shaping. This application divides the prong into a plurality of sub-tips portion and makes the terminal surface of prong form the ladder-shaped structure, compare in the scheme that adopts the trapezoidal prong (in this scheme, the size of adjacent stator punching is all inequality but differs less for the prong that piles up the formation wholly is the ladder-shaped structure, the prong is basically the inclined plane along the both ends face of stator core circumference, and not the ladder face of this application), can show the stator tooth and fold the kind of the stator punching that the shaping adopted, thereby improve the machinability of stator tooth, reduce the processing degree of difficulty of stator tooth. Such as: the number of the sub-tip portions is three, and only three stator punching sheets with three sizes need to be selected, are respectively laminated and molded to form three pieces, and are then laminated together to form the complete stator tooth. A plurality of sub-tip can adopt the stator punching of corresponding shape to fold and press and form the stairstepping, compare in trapezoidal stator tooth point, can reduce the kind of punching, the machine-shaping of being convenient for.

The thickness D (such as D1, D2, D3 and the like) of each sub-tip part can be flexibly adjusted according to specific use scenes and requirements on processing and performance optimization.

In addition, the stator teeth in the above technical solution provided by the present invention may also have the following additional technical features:

in the above technical scheme, the tooth body has the median vertical plane, the median vertical plane is followed stator core's axial extension, sub-sharp portion is followed the terminal surface at stator core circumference both ends is about the median vertical plane symmetry, and is adjacent sub-sharp portion is followed stator core circumference's span L has the difference, makes adjacent sub-sharp portion is followed the terminal surface at stator core circumference both ends staggers each other.

Two circumference terminal surfaces of sub-point portion are symmetrical about the median plane of tooth body (this median plane is along stator core's axial extension), and adjacent sub-point portion is different along stator core circumference's span L on same stator tooth, can make adjacent sub-point portion stagger each other along the terminal surface at stator core circumference's both ends, thereby make the tooth point all form the stairstepping structure along stator core circumference's both ends, this makes stator tooth's structure comparatively regular, the machine-shaping of both being convenient for, also be convenient for assemble the wire winding, also be favorable to further improving rotor permanent magnet's utilization ratio, further improve the back emf of motor. Meanwhile, the span L of the sub-tips is inconsistent, so that flexible adjustment is facilitated according to specific use scenes and requirements for processing and performance optimization.

In the above technical solution, along the radial inside-out of stator core, the sub-tip portion is along the span L of stator core circumference increases gradually.

Along stator core's radial from inside to outside, the span L (like L1, L2, L3 etc.) crescent along stator core circumference at the sub-point portion, can effectively improve the condition that the notch distance between the adjacent stator tooth point of axial flux motor increases along with the increase of stator yoke portion external diameter among the prior art, therefore existing utilization ratio that does benefit to the improvement rotor permanent magnet, also be favorable to reducing the introduction of harmonic, thereby avoid causing the sine reduction of back electromotive force and the increase of cogging torque ripple, be favorable to the application extension of axial motor.

In any one of the above technical solutions, the tooth body is followed stator core's axial extension, the tooth body includes a plurality of edges stator core's the sub-body portion of radially arranging, the quantity of sub-body portion with the quantity of sub-point portion is equal and the one-to-one, sub-body portion with correspond sub-point portion integrated into one piece.

The tooth body includes a plurality of sub-body portions, a plurality of sub-body portions are arranged along stator core's radial, with a plurality of sub-point portion one-to-ones of prong, and every sub-body portion and the integrated into one piece of the sub-point portion that corresponds, then whole stator tooth can follow stator core's radial polylith of dividing into, then fold and press and form the stator tooth, this structure of having simplified the product, the wholeness that makes the product is better, and the connection step of prong and tooth body has been saved, the assembly efficiency of product has further been improved. Such as: each stator punching sheet can be formed by laminating a plurality of stator punching sheets with the same shape along the radial direction of the stator core, and then a plurality of stator punching sheets are laminated along the radial direction of the stator core to form stator teeth.

In the above technical solution, the shapes of the plurality of the sub-body parts are identical.

The shapes of the plurality of body parts are consistent, namely: the width H (along stator core's circumference, parallel with the length direction of sub-point portion) and the profile shape of a plurality of body portions are the same, and this makes the shape of the tooth body of stator tooth comparatively regular, both is convenient for machine-shaping, also is favorable to simplifying the structure of stator yoke portion, is convenient for stator tooth and stator yoke portion assembly.

In any of the above technical solutions, the tooth body is provided with a positioning portion for fitting a fitting portion provided on the stator yoke portion; wherein the positioning part comprises a positioning protrusion for fitting the mating part configured as a positioning groove; and/or, the positioning part comprises a positioning groove for adapting to the matching part configured as a positioning protrusion.

Set up location portion on the tooth body, corresponding cooperation portion that sets up on stator yoke portion utilizes the cooperation of location portion and cooperation portion during the assembly, can play good positioning action and limiting displacement, is favorable to tooth body and stator yoke portion rapid Assembly.

The positioning protrusions are inserted into the positioning grooves, so that relative motion of the stator teeth and the stator yoke can be effectively prevented, the tooth body and the stator yoke can be quickly assembled, and the connection stability of the stator teeth and the stator yoke is improved; and the positioning bulge and the positioning groove have simpler structures and are convenient to machine and form. Optionally, the positioning protrusion is a positioning rib extending along a length direction of the tooth tip.

In any one of the above technical solutions, the number of the tooth tips is one, and one stator tooth tip is disposed on one end surface of the tooth body; or the number of the tooth tips is two, and the two tooth tips are arranged on the two end faces of the tooth body which are arranged in a back-to-back mode.

The number of the tooth tips on each tooth body can be adjusted according to actual requirements. Specifically, one tooth tip can be arranged on the tooth body of one stator, two tooth tips can be arranged on the tooth body of one stator, and the two tooth tips can be respectively arranged on two end faces of the tooth body.

In any one of the above technical solutions, the stator teeth are formed by laminating a plurality of stator punching sheets.

The stator tooth is formed by laminating a plurality of stator punching sheets, has a simple structure and is convenient to machine and mold. Of course, the stator teeth can be formed in other modes such as bonding and clamping.

An aspect of a second aspect of the present invention provides a stator core including the stator teeth according to any one of the aspects of the first aspect.

The stator core according to the second aspect of the present invention includes the stator tooth according to any one of the first aspect of the present invention, so that all the advantages of any one of the above-mentioned technical solutions are provided, and details are not repeated herein.

Specifically, the stator tooth links to each other with stator core's stator yoke portion, and the tooth body of stator tooth is along the axial extension of stator yoke portion, guarantees that the motor after the assembly is accomplished is the axial motor.

The stator teeth and the stator yoke can be made of silicon steel sheets, and other schemes capable of achieving the purpose of the invention are within the protection scope of the invention.

In the above technical solution, the number of the stator teeth is plural, and the plural stator teeth are uniformly distributed along the circumferential direction of the stator yoke.

The quantity of stator tooth is a plurality of, and a plurality of stator teeth are along stator yoke portion's circumference evenly distributed for stator core's structure is more regular, and the machine-shaping of both being convenient for also is favorable to increasing the quantity of winding, and then helps improving stator core's power level.

In the above technical solution, the plurality of stator teeth have the same shape.

The shapes of the stator teeth are the same, the regularity of the stator core structure is further improved, and the stability of the motor performance is facilitated.

In the above technical solution, the minimum distances S between the corresponding sub-tip portions of any adjacent stator teeth are equal.

The minimum space S between the sub-tip parts corresponding to any adjacent stator teeth is equal, so that the structure of the product is more regular, the product is convenient to machine and form, and the product is also more attractive. Of course, the minimum distance S between the sub-tip portions corresponding to adjacent stator teeth may also be unequal, for example, gradually increasing in the radial outward direction, and may be flexibly adjusted according to the specific use scenario and the optimization requirement of the processing performance.

In any of the above technical solutions, the stator yoke is detachably connected to the stator teeth.

The stator yoke portion can be dismantled with the stator tooth and be connected for the winding is around not receiving the restriction of stator core shape when establishing, and every stator tooth can be connected with stator yoke portion again after the winding finishes around establishing, and the wire winding mode is nimble, has improved the winding of winding and has established efficiency. In addition, the size of the winding slots can be adjusted by reasonably arranging the size of the stator teeth or the distance between the stator teeth, so that the number of the windings can be flexibly set, and the power grade of the stator core can be reasonably adjusted.

Of course, the stator teeth and the stator yoke portion may be bonded or otherwise formed into an integrated structure, that is, the stator teeth and the stator yoke portion are not detachable after being assembled.

In the above technical solution, the stator yoke is provided with a stator yoke slot adapted to the shape of the tooth body of the stator tooth, and the tooth body is fitted to the stator yoke slot.

Set up stator yoke slot on stator yoke portion, then when stator tooth and stator yoke portion assemble, directly pass every stator tooth with the stator yoke slot of its shape looks adaptation, can realize the rapid Assembly of stator tooth and stator yoke portion, effectively improved the assembly efficiency of stator tooth and stator yoke portion.

In the above-described aspect, the stator yoke slot penetrates at least one axial end surface of the stator yoke; and/or the stator yoke slot has a distance with the inner circumferential surface and the outer circumferential surface of the stator yoke in the radial direction of the stator core; alternatively, the stator yoke slot penetrates an inner circumferential surface and/or an outer circumferential surface of the stator yoke.

The stator yoke slot can be followed an axial and run through an terminal surface of stator yoke portion, also can run through two terminal surfaces of stator yoke portion along the axial, and the stator tooth can insert the stator yoke slot of establishing on running through an terminal surface of stator yoke portion promptly, also can insert the stator yoke slot of establishing at two terminal surfaces of running through the stator yoke portion for the connected mode of stator tooth and stator yoke portion is various, and the assembled mode of winding is comparatively nimble, and then satisfies user's different demands.

The stator yoke slot has a distance from the inner circumferential surface and the outer circumferential surface of the stator yoke in the radial direction, namely: the stator yoke slot penetrates through the stator yoke along the axial direction and is not directly connected with the inner circumferential surface and the outer circumferential surface of the stator yoke, so that the stator teeth are inserted into the stator yoke slot along the axial direction of the stator yoke to be connected with the stator yoke, the stator teeth are prevented from being separated from the stator yoke along the outer circumferential surface or the inner circumferential surface of the stator yoke from the stator yoke slot, and the connection reliability of the stator teeth and the stator yoke is improved.

The stator yoke slots can also penetrate through the inner circumferential surface of the stator yoke part along the radial direction, and have a distance with the outer circumferential surface of the stator yoke part along the radial direction, so that the stator teeth can be inserted into the stator yoke slots along the radial direction from the inner circumferential surface of the stator yoke part, the connection mode is flexible, and the assembly between the stator teeth and the stator yoke part is convenient.

The stator yoke slot can also penetrate through the outer circumferential surface of the stator yoke part along the radial direction, and a distance exists between the stator yoke slot and the inner circumferential surface of the stator yoke part along the radial direction, so that the stator teeth can be inserted into the stator yoke slot along the radial direction from the outer circumferential surface of the stator yoke part, the connection mode is flexible, and the assembly between the stator teeth and the stator yoke part is convenient.

The stator yoke slots may also penetrate the inner and outer circumferential surfaces of the stator yoke in the radial direction, that is: the stator yoke slot is directly connected with the outer circumferential surface and the inner circumferential surface of the stator yoke part, so that the stator teeth can be axially or radially inserted into the stator yoke slot from the outer circumferential surface or the inner circumferential surface to form a complete stator core, the connection mode is flexible, and the assembly between the stator teeth and the stator yoke part is convenient.

In the above technical scheme, the stator yoke is provided with the stator boss matched with the tooth body of the stator tooth in shape, and the stator boss is clamped with the tooth body.

Set up the stator boss on stator yoke portion, utilize stator boss and tooth body joint cooperation, can realize the rapid Assembly of stator tooth and stator yoke portion, be favorable to improving the assembly efficiency of stator tooth and stator yoke portion.

Further, stator yoke portion also can set up stator yoke slot and stator boss simultaneously, when the stator tooth assembles with stator yoke portion, directly pass every stator tooth with the stator yoke slot of its shape looks adaptation or with stator tooth and stator boss joint, can pass the stator yoke slot setting with some in a plurality of stator teeth even, all the other stator teeth and stator boss joint, the quick assembly of stator tooth and stator yoke portion all can be realized to above-mentioned arbitrary mode, the assembly efficiency of stator tooth and stator yoke portion has effectively been improved.

In any of the above technical solutions, the stator yoke is an integrated structure; or, the stator yoke part comprises a plurality of split type sub-yoke parts, and the plurality of sub-yoke parts are spliced to form the stator yoke part.

Stator yoke portion can be the monoblock, and integrated into one piece is favorable to improving the integrality of product to improve assembly efficiency. The stator yoke portion can also be formed by the piecing together of a plurality of sub-yoke portion blocks, is favorable to promoting stator yoke portion's material utilization.

In any one of the above technical solutions, the stator yoke portion is provided with a through hole, and the through hole is located between two adjacent stator teeth.

Set up the through-hole on stator yoke portion, and the through-hole is located between two adjacent stator teeth, can be used for stator yoke portion edge weld, or be convenient for stator yoke portion and casing or other structure fixed connection, also can be used for the winding to cross the line.

In the above technical solution, the number of the through holes is plural, and the plural through holes are distributed at intervals in the circumferential direction of the stator yoke.

Set up a plurality of through-holes at the circumference interval of stator yoke portion, both be favorable to the stator core assembly, also be favorable to improving the joint strength of stator core and other structures, also be favorable to the stator core wire winding simultaneously. Further, a plurality of stator teeth are evenly distributed along the radial direction of the stator yoke portion, and any through hole is arranged in the middle of two adjacent stator teeth (namely, an angular bisector).

An aspect of the third aspect of the present invention provides a stator including the stator core according to any one of the second aspect.

The stator provided by the technical solution of the third aspect of the present invention includes the stator core according to any one of the technical solutions of the second aspect, so that all the advantages of any one of the technical solutions are achieved, and details are not repeated herein.

Specifically, the winding of the stator is wound on the tooth body of the stator core.

Further, the winding is wound around the tooth body of the stator tooth and is located on the end face of the stator yoke. The windings may be multiple, and the coil shapes of the multiple windings may be the same or different. The windings may be one, two or more sets.

A technical solution of a fourth aspect of the present invention provides a motor, including: at least one stator according to the third aspect; and at least one rotor, each rotor being disposed in correspondence with the stator.

The motor provided by the technical solution of the fourth aspect of the present invention includes the stator provided by the technical solution of the third aspect, so that all the beneficial effects of any one of the above technical solutions are achieved, and details are not repeated herein.

It should be noted that the category of the motor includes, but is not limited to, a single-stator single-rotor motor, a single-stator double-rotor motor, a single-rotor double-stator motor, and a double-stator double-rotor motor, and the number of the stators and the number of the rotors may be one or more.

In the above technical solution, the number of the stators is smaller than the number of the rotors, and any one of the stators is disposed between two adjacent rotors; or the number of the stators is larger than that of the rotors, and any one of the rotors is arranged between two adjacent stators.

The quantity of stator is less than the quantity of rotor, and arbitrary two adjacent rotors share a stator, and the structure is comparatively regular, helps simplifying the structure of product, and is convenient for the assembly of rotor and stator.

Or the number of the stators is larger than that of the rotors, any two adjacent stators share one rotor, the structure is regular, the structure of a product is simplified, and the assembly of the rotors and the stators is facilitated.

It will be understood that the number of stators is referred to as a first number and the number of rotors is referred to as a second number. When the number of the rotors is larger than that of the stators, and the second number is N +1, and the first number is N, the N +1 rotors can be arranged at intervals, and then the N stators are respectively inserted between two adjacent rotors to form the motor.

Or, when the number of the stators is greater than that of the rotors, and the second number is N, and the first number is N +1, the N +1 stators may be arranged at intervals, and then the N rotors are respectively inserted between two adjacent stators to form the motor.

In the above technical solution, the number of the stators is at least two, the number of the stator teeth of at least two of the stators is the same, or the number of the phases of at least two of the stators is the same; or the number of the stators is at least two, the number of the stator teeth of at least two stators is different, or the number of the phases of at least two stators is different.

The number of stators is at least two, and the number of stator teeth of at least two stators is the same, facilitating assembly of the stator teeth with the stator yoke, or the number of phases of at least two stators is the same, i.e. the number of windings on each stator is the same, so that the power levels on each stator are the same.

The number of the stators is at least two, the number of the stator teeth of the at least two stators is different, or the number of the phases of the at least two stators is different, namely the number of the windings on each stator is different, so that a user can meet the requirement of actual power by reasonably winding on each stator.

In the technical scheme, the rotor is a permanent magnet rotor or a squirrel-cage rotor or a salient pole rotor; and/or the number of the rotors is multiple, the number of pole pairs of the rotors is the same or different, and the rotors rotate independently.

The number of the rotors is set to be a plurality of, the rotating shafts of at least two rotors can be coaxially arranged or arranged in parallel or vertically, the arrangement mode is various, and the installation mode is flexible.

Wherein the one or more rotors may be permanent magnet rotors or squirrel cage rotors or salient pole rotors, the number of pole pairs of at least two of the rotors being different or the number of pole pairs of at least two of the rotors being the same.

The quantity of rotor is a plurality of, and two at least rotors can set up the same number of pole pairs, also can set up different number of pole pairs to satisfy the needs of different operating modes.

In the above technical scheme, the rotor is a permanent magnet rotor, the permanent magnet rotor includes rotor yoke portion and permanent magnet steel, the permanent magnet steel table paste in rotor yoke portion, and be located rotor yoke portion with between the prong of stator. The scheme can meet the specific requirements of products.

In the above technical scheme, the rotor is a permanent magnet rotor, the permanent magnet rotor only includes a plurality of permanent magnet steel magnets, the permanent magnet steel magnets adopt a Halbach array (Halbach) magnetizing mode, the plurality of permanent magnet steel magnets are annularly arranged, and an injection molding mode is adopted to form an integrated structure. This solution saves material usage of the rotor yoke.

An aspect of the fifth aspect of the present invention provides a fan including the motor according to any one of the aspects of the fourth aspect.

The fan provided by the technical scheme of the fifth aspect of the present invention includes the motor according to any one of the technical schemes of the first aspect, so that all the beneficial effects of any one of the technical schemes are achieved, and are not described herein again.

Specifically, the motor is mounted in a housing of the blower. Further, the fan includes the impeller, and the output shaft fixed connection of impeller and motor.

Of course, the motor provided by the application can also be used on vehicles, compressors or other equipment.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a stator tooth according to an embodiment of the present invention;

FIG. 2 is a schematic view of a stator tooth according to another embodiment of the present invention;

fig. 3 is a schematic top view of a stator core according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a stator yoke according to an embodiment of the present invention;

FIG. 5 is a schematic structural view of a stator yoke according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of a stator yoke according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a stator yoke according to an embodiment of the present invention;

FIG. 8 is a partial assembly schematic view of a single stator and single rotor electric machine provided in accordance with one embodiment of the present invention;

fig. 9 is a structural view of a stator core of the single stator and single rotor motor shown in fig. 8;

fig. 10 is a partial assembly schematic of a single stator, dual rotor electric machine provided in accordance with one embodiment of the present invention;

fig. 11 is a structural view of a stator core of the single-stator double-rotor motor shown in fig. 10;

wherein, the correspondence between the reference numbers and the part names in fig. 1 to 11 is:

a motor 1;

a stator 2, a rotor 3;

a stator core 20, a winding 21, stator teeth 22, a stator yoke 23; a first rotor yoke 31, a first permanent magnet steel 32, a second rotor yoke 33, a second permanent magnet steel 34;

stator yoke slots 231, yoke end surfaces 232, through holes 233;

a first tooth portion 221, a first sub-tip portion 2211, a first sub-body portion 2212; a second tooth portion 222, a second sub-tip portion 2221, a second sub-body portion 2222; a third tooth portion 223, a third sub-body portion 2231, a third sub-tip portion 2232; the positioning projection 220.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Stator teeth, a stator core, a stator, a motor, and a fan according to some embodiments of the present invention are described below with reference to fig. 1 to 11.

First, an embodiment of the first aspect, specifically the stator teeth 22, is described.

Example one

A stator tooth 22 of a stator core 20, comprising: tooth body and tooth point.

Specifically, the tooth body is adapted to be connected to the stator yoke 23 of the stator core 20 and extend in the axial direction of the stator yoke 23, as shown in fig. 9 and 11.

The tip is connected to the end face of the tooth body as shown in fig. 1 and 2. The tooth tip includes at least two sub-tip portions, and all the sub-tip portions of the tooth tip are arranged in the radial direction of the stator core 20, as shown in fig. 9 and 11; and at least one end surfaces of two ends of adjacent sub-tip portions along the circumferential direction of the stator core 20 are staggered with each other, so that at least one end of the tooth tip along the circumferential direction of the stator core 20 forms a stepped structure, as shown in fig. 1 and 2.

The stator tooth 22 that this embodiment provided is applicable to the axial motor, divides into a plurality of sub-tip portions with its tooth point, because a plurality of sub-tip portions are arranged along stator core 20's radial, and stagger each other along at least one terminal surface at stator core 20 circumference both ends of the adjacent sub-tip portion of same stator tooth 22 for the tooth point has formed the stair-shaped structure along the terminal surface of stator core 20 circumference at least one end.

Compared with a straight end face in the prior art, the stepped end face facilitates reasonable utilization of space between adjacent stator teeth 22 according to the specific structure of the motor 1, so that the contact area between the stator teeth 22 and the permanent magnet of the rotor 3 is increased, the utilization rate of the permanent magnet of the rotor 3 is improved, and the torque density of the motor 1 is improved.

Meanwhile, the widths of radial parts of the notches between adjacent tooth tips on the stator core 20 can be reasonably adjusted by utilizing the stepped end surfaces, so that the introduction of harmonic waves is reduced, the back electromotive force of the motor 1 is effectively improved, the cogging torque of the motor 1 is reduced, and the application expansion of the axial motor 1 is facilitated.

In addition, because the stator teeth 22 have a certain thickness, a plurality of stator laminations can be laminated and molded along the thickness direction. This application divides the prong into a plurality of sub-tips portion and makes the terminal surface of prong form the ladder-shaped structure, compare in the scheme that adopts the trapezoidal prong (in this scheme, the size of adjacent stator punching is all inequality but differs less for the prong that piles up the formation wholly is the ladder-shaped structure, the prong is basically the inclined plane along the both ends face of stator core circumference, and not the ladder face of this application), can show the stator punching's that reduces stator tooth 22 and fold the shaping adoption kind, thereby improve stator tooth 22's machinability, reduce stator tooth 22's the processing degree of difficulty.

Such as: the number of the sub-tip portions is three (respectively marked as a first sub-tip portion 2211, a second sub-tip portion 2221 and a third sub-tip portion 2232), only three stator punching sheets with three sizes need to be selected, three stator punching sheets are respectively formed by laminating and then laminated together, and the complete stator tooth 22 can be obtained. A plurality of sub-point portions can adopt the stator punching of corresponding shape to fold and press and form the stairstepping, compare in trapezoidal stator tooth point (all stator punching's size is all inequality, therefore stator punching kind is as many with stator punching's quantity), can reduce the kind of punching, the machine-shaping of being convenient for.

Further, the tooth body has a vertical plane extending in the axial direction of the stator core, the end surfaces of the sub-tip portions at both ends in the circumferential direction of the stator core are symmetrical with respect to the vertical plane, and the span L of the adjacent sub-tip portions in the circumferential direction of the stator core 20 has a difference such that the end surfaces of the adjacent sub-tip portions at both ends in the circumferential direction of the stator core 20 are staggered with respect to each other, as shown in fig. 1 and 2.

Two circumference terminal surfaces of sub-point portion are symmetrical about the median plane of tooth body (this median plane is along stator core's axial extension), and adjacent sub-point portion is different along stator core 20 circumference's span L on same stator tooth 22, can make adjacent sub-point portion all stagger each other along the terminal surface at stator core 20 circumference's both ends, thereby make the tooth point all form the stairstepping structure along stator core 20 circumference's both ends, this makes stator tooth 22's structure comparatively regular, the machine-shaping of both being convenient for, also be convenient for assemble the wire winding, also be favorable to further improving the utilization ratio of rotor 3 permanent magnet, further improve motor 1's back emf.

Meanwhile, the span L of the sub-tips is inconsistent, so that flexible adjustment is facilitated according to specific use scenes and requirements for processing and performance optimization.

Further, the sub-tip portion gradually increases in the span L in the circumferential direction of the stator core 20 from the inside to the outside in the radial direction of the stator core 20, as shown in fig. 9 and 11.

From inside to outside along the radial of stator core 20, the span L (like L1, L2, L3 etc.) of sub-point portion along stator core 20 circumference is crescent, can effectively improve the notch distance between the adjacent stator tooth point of axial flux motor 1 among the prior art and increase along with the increase of stator yoke 23 external diameter and the circumstances that increases, therefore both do benefit to the utilization ratio that improves rotor 3 permanent magnet, also be favorable to reducing the introduction of harmonic, thereby avoid causing the sine reduction of back electromotive force and the increase of cogging torque ripple, be favorable to the application extension of axial motor 1.

Further, the tooth body extends in the axial direction of the stator core 20, and the tooth body includes a plurality of sub-body portions arranged in the radial direction of the stator core 20, as shown in fig. 1 and 2. The number of the sub-body parts is equal to that of the sub-tip parts, the sub-body parts correspond to the sub-tip parts one by one, and the sub-body parts and the corresponding sub-tip parts are integrally formed.

The tooth body includes a plurality of sub-body portions, a plurality of sub-body portions are arranged along stator core 20's radial, with a plurality of sub-point portion one-to-ones of prong, and the integrated into one piece of every sub-body portion and the sub-point portion that corresponds, then whole stator tooth 22 can follow stator core 20's radial a plurality of tooth portions of divideing into, then a plurality of tooth portions are folded and are pressed and form stator tooth 22, this structure of having simplified the product, make the wholeness of product better, and saved the connection step of prong with the tooth body, the assembly efficiency of product has further been improved.

In a specific example, the number of the sub-body portions is three, which are respectively denoted as a first sub-body portion 2212, a second sub-body portion 2222 and a third sub-body portion 2231, the first sub-body portion 2212 is integrally formed with the first sub-tip portion 2211, and the first tooth portion 221 is formed by laminating a plurality of stator laminations with the same shape along the radial direction of the stator core 20; the second body portion 2222 and the second sub-tip portion 2221 are integrally formed, and a plurality of stator laminations with the same shape are laminated in the radial direction of the stator core 20 to form a second tooth portion 222; the third sub-body 2231 and the third sub-tip 2232 are integrally formed, and a plurality of stator laminations having the same shape are stacked in the radial direction of the stator core 20 to form a third tooth 223. Then, the first tooth portion 221, the second tooth portion 222, and the third tooth portion 223 are laminated in the radial direction of the stator core 20 to form the stator teeth 22.

Wherein, the span L1 of the first sub-tip 2211, the span L2 of the second sub-tip 2221, and the span L3 of the third sub-tip 2232 satisfy: l1 < L2 < L3.

The thickness D1 of the first sub-tip portion 2211, the thickness D2 of the second sub-tip portion 2221, and the thickness D3 of the third sub-tip portion 2232 may be adjusted according to a specific use scenario.

Optionally, the shapes of the plurality of sub-body parts are uniform, as shown in fig. 1 and 2.

The shapes of the plurality of body parts are consistent, namely: the width H (parallel to the length direction of the sub-tip portion along the circumferential direction of the stator core 20) and the profile shape of the plurality of sub-body portions are the same, so that the tooth body of the stator tooth 22 is regular in shape, the stator tooth is convenient to machine and form, the structure of the stator yoke portion 23 is also facilitated to simplify, and the stator tooth 22 and the stator yoke portion 23 are convenient to assemble.

Specifically, the number of teeth tips is one, and one stator tooth tip is provided on one end surface of the tooth body, as shown in fig. 1.

Further, the stator teeth 22 are formed by laminating a plurality of stator punching sheets.

The stator teeth 22 are formed by laminating a plurality of stator punching sheets, and are simple in structure and convenient to machine and form. Of course, the stator teeth 22 may be formed by bonding, clamping, or other methods.

Example two

The difference from the first embodiment is that: the number of the tooth tips is two, and the two tooth tips are arranged on the two end faces which are arranged oppositely on the tooth body, as shown in fig. 2.

The number of the tooth tips on each tooth body can be adjusted according to actual requirements. Specifically, one tooth tip may be disposed on the tooth body of one stator 2, two tooth tips may be disposed on the tooth body of one stator 2, and the two tooth tips may be disposed on two end faces of the tooth body, respectively.

Alternatively, the two tips are identical in shape and symmetrical to each other, as shown in fig. 2. This makes the structure of stator teeth 22 more regular, and is favorable to improving the structural regularity of stator core 20. Accordingly, the tooth body can be designed as a mirror-symmetrical structure, and the symmetry plane is parallel to the two tooth tips and has the same distance with the two tooth tips, which is equivalent to the butt joint of the two stator teeth 22 in fig. 1. Such as: two positioning protrusions 220 are arranged on the stator tooth body, and are also symmetrical with respect to the symmetrical mirror surface, as shown in fig. 2.

EXAMPLE III

The difference from any of the above embodiments is that: in addition to any of the above embodiments, the tooth body is further provided with a positioning portion for fitting the fitting portion provided on the stator yoke portion 23.

Set up location portion on the tooth body, corresponding cooperation portion that sets up on stator yoke portion 23 utilizes the cooperation of location portion and cooperation portion during the assembly, can play good positioning action and limiting displacement, is favorable to tooth body and stator yoke portion 23 rapid Assembly.

Optionally, the positioning portion includes a positioning protrusion 220, as shown in fig. 1 and 2. The positioning projection 220 is for fitting a fitting portion configured as a positioning groove.

Optionally, the positioning portion comprises a positioning groove for fitting a mating portion configured as a positioning protrusion 220.

The positioning protrusions 220 are inserted into the positioning grooves, so that relative motion between the stator teeth 22 and the stator yoke 23 can be effectively prevented, the tooth bodies and the stator yoke 23 can be quickly assembled, and the connection stability of the stator teeth 22 and the stator yoke 23 is improved; and the positioning protrusion 220 and the positioning groove have simpler structures, and are convenient to machine and mold. Alternatively, the positioning protrusion 220 is a positioning rib extending along the length of the tooth tip.

As shown in fig. 3, an embodiment of the second aspect of the present invention provides a stator core 20 including: a stator yoke 23 and a stator tooth 22 as in any of the embodiments of the first aspect. In which the stator teeth 22 are connected to the stator yoke 23, as shown in fig. 9 and 11.

The stator core 20 provided in the embodiment of the second aspect of the present invention includes the stator teeth 22 in any one of the embodiments of the first aspect, so that all the advantages of any one of the embodiments described above are achieved, and details are not repeated herein.

The material of the stator teeth 22 and the stator yoke 23 may be silicon steel sheet, and other schemes that can achieve the purpose of the present invention are all within the protection scope of the present invention.

Alternatively, the number of the stator teeth 22 is plural, and the plural stator teeth 22 are uniformly distributed along the circumferential direction of the stator yoke 23, as shown in fig. 3, 9, and 11.

Stator tooth 22's quantity is a plurality of, and a plurality of stator tooth 22 are along stator yoke portion 23's circumference evenly distributed for stator core 20's structure is more regular, and the machine-shaping of both being convenient for also is favorable to increasing the quantity of winding 21, and then helps improving stator core 20's power level.

Alternatively, the plurality of stator teeth 22 are identical in shape, as shown in fig. 3, 9, and 11.

The shapes of the plurality of stator teeth 22 are the same, so that the regularity of the structure of the stator core 20 is further improved, and the stability of the performance of the motor 1 is facilitated.

Alternatively, the minimum spacing S between corresponding sub-tips of any adjacent stator teeth 22 is equal, as shown in fig. 3, 9 and 11.

The minimum spacing S between the sub-tip portions corresponding to any adjacent stator teeth 22 is equal, so that the product structure is more regular, the processing and forming are convenient, and the appearance is attractive.

Such as: for the case that the stator tooth 22 includes three tooth portions, the minimum spacing S1 between the adjacent first sub-tip portions 2211, the minimum spacing S2 of the adjacent second sub-tip portions 2221, and the minimum spacing S3 between the adjacent third sub-tip portions 2232 satisfy: S1-S2-S3.

Of course, the minimum spacing S between the corresponding sub-tips of the adjacent stator teeth 22 may also be unequal, for example, S1 < S2 < S3, which can be flexibly adjusted according to the specific use scenario and the optimization requirement of the processing performance.

Further, the stator yoke 23 is detachably coupled to the stator teeth 22.

The stator yoke portion 23 and the stator teeth 22 are detachably connected, so that the winding 21 is not limited by the shape of the stator core 20 when being wound, each stator tooth 22 can be connected with the stator yoke portion 23 after the winding 21 is wound, the winding mode is flexible, and the winding efficiency of the winding 21 is improved.

In addition, the size of the winding slots can be adjusted by reasonably arranging the size of the stator teeth 22 or the distance between the stator teeth 22, so that the number of the windings 21 can be flexibly set, and the power level of the stator core 20 can be reasonably adjusted.

Of course, the stator teeth 22 and the stator yoke 23 may also be bonded or otherwise formed into an integral structure, that is, the stator teeth 22 and the stator yoke 23 are not detachable after being assembled.

Alternatively, the stator yoke 23 is provided with stator yoke slots 231 (shown in fig. 4 to 7) adapted to the shape of the tooth bodies of the stator teeth 22, and the tooth bodies are fitted into the stator yoke slots 231, as shown in fig. 9 and 11.

The stator yoke 23 is provided with the stator yoke slots 231, so that when the stator teeth 22 are assembled with the stator yoke 23, each stator tooth 22 directly penetrates through the stator yoke slots 231 matched with the stator teeth in shape, the stator teeth 22 and the stator yoke 23 can be quickly assembled, and the assembly efficiency of the stator teeth 22 and the stator yoke 23 is effectively improved.

In some embodiments of the present invention, the stator yoke slot 231 extends through at least one axial end surface of the stator yoke 23.

The stator yoke slot 231 may axially penetrate through one end surface of the stator yoke 23, or may axially penetrate through two end surfaces of the stator yoke 23 (as shown in fig. 4 to 7), that is, the stator tooth 22 may be inserted into the stator yoke slot 231 penetrating through one end surface of the stator yoke 23, or may be inserted into the stator yoke slot 231 penetrating through two end surfaces of the stator yoke 23, so that the connection manner between the stator tooth 22 and the stator yoke 23 is various, the assembly manner of the winding 21 is flexible, and different requirements of users are further satisfied.

In one embodiment of the present invention, the stator yoke slots 231 have a spacing from the inner circumferential surface and the outer circumferential surface of the stator yoke 23 in the radial direction of the stator core 20, as shown in fig. 5.

The stator yoke slots 231 have a spacing in the radial direction from both the inner and outer circumferential surfaces of the stator yoke 23, that is: the stator yoke slots 231 axially penetrate through the stator yoke 23 and are not directly connected with the inner circumferential surface and the outer circumferential surface of the stator yoke 23, so that the stator teeth 22 are inserted into the stator yoke slots 231 along the axial direction of the stator yoke 23 to be connected with the stator yoke 23, the stator teeth 22 are prevented from being separated from the stator yoke 23 along the outer circumferential surface or the inner circumferential surface of the stator yoke 23 from the stator yoke slots 231, and the connection reliability of the stator teeth 22 and the stator yoke 23 is improved.

In one embodiment of the present invention, the stator yoke slots 231 penetrate the inner circumferential surface of the stator yoke 23, as shown in fig. 7.

The stator yoke slots 231 may also radially penetrate through the inner circumferential surface of the stator yoke 23 and have a radial distance from the outer circumferential surface of the stator yoke 23, so that the stator teeth 22 may be radially inserted into the stator yoke slots 231 from the inner circumferential surface of the stator yoke 23, and the connection manner is flexible, thereby facilitating the assembly between the stator teeth 22 and the stator yoke 23.

In one embodiment of the present invention, the stator yoke slots 231 penetrate the outer circumferential surface of the stator yoke 23, as shown in fig. 4 and 6.

The stator yoke slots 231 may also radially penetrate through the outer circumferential surface of the stator yoke 23, and have a radial distance from the inner circumferential surface of the stator yoke 23, so that the stator teeth 22 may be radially inserted into the stator yoke slots 231 from the outer circumferential surface of the stator yoke 23, and the connection manner is flexible, thereby facilitating the assembly between the stator teeth 22 and the stator yoke 23.

In one embodiment of the present invention, the stator yoke slots 231 penetrate the inner and outer circumferential surfaces of the stator yoke 23.

The stator yoke slots 231 may also penetrate the inner circumferential surface and the outer circumferential surface of the stator yoke 23 in the radial direction, that is: the stator yoke slots 231 are directly connected with the outer circumferential surface and the inner circumferential surface of the stator yoke 23, so that the stator teeth 22 can be axially or radially inserted into the stator yoke slots 231 from the outer circumferential surface or the inner circumferential surface to form the complete stator core 20, the connection mode is flexible, and the assembly between the stator teeth 22 and the stator yoke 23 is convenient.

In some embodiments of the invention, the stator yoke 23 is provided with a stator boss that is adapted to the shape of the tooth body of the stator tooth 22, and the stator boss is engaged with the tooth body.

Set up the stator boss on stator yoke portion 23, utilize stator boss and tooth body joint cooperation, can realize the rapid Assembly of stator tooth 22 and stator yoke portion 23, be favorable to improving the assembly efficiency of stator tooth 22 and stator yoke portion 23.

Further, the stator yoke 23 can also be provided with the stator yoke slots 231 and the stator bosses at the same time, when the stator teeth 22 are assembled with the stator yoke 23, each stator tooth 22 directly penetrates through the stator yoke slot 231 matched with the shape of the stator tooth 22 or the stator teeth 22 are clamped with the stator bosses, even a part of the plurality of stator teeth 22 can penetrate through the stator yoke slots 231, and the rest of the stator teeth 22 are clamped with the stator bosses, and any mode can realize the quick assembly of the stator teeth 22 and the stator yoke 23, thereby effectively improving the assembly efficiency of the stator teeth 22 and the stator yoke 23.

In any of the above embodiments, optionally, the stator yoke 23 is a unitary structure.

Alternatively, the stator yoke 23 includes a plurality of split sub-yokes that are spliced to form the stator yoke 23.

Stator yoke portion 23 can be the monoblock, and integrated into one piece is favorable to improving the integrality of product to improve assembly efficiency. The stator yoke 23 can also be formed by splicing a plurality of sub-yoke segments, which is beneficial to improving the material utilization rate of the stator yoke 23.

In any of the above embodiments, optionally, the stator yoke portion 23 is provided with the through hole 233, and the through hole 233 is located between two adjacent stator teeth 22, as shown in fig. 6.

The through hole 233 is formed in the stator yoke portion 23, and the through hole 233 is located between two adjacent stator teeth 22, so that the through hole 233 can be used for welding the edge of the stator yoke portion 23, or is convenient for the stator yoke portion 23 to be fixedly connected with a casing or other structures, and can also be used for passing a wire through the winding 21.

Further, the number of the through holes 233 is plural, and the plural through holes 233 are distributed at intervals in the circumferential direction of the stator yoke 23, as shown in fig. 6.

The plurality of through holes 233 are formed in the stator yoke portion 23 at intervals in the circumferential direction, which is not only beneficial to assembling the stator core 20, but also beneficial to improving the connection strength between the stator core 20 and other structures, and is also beneficial to winding the stator core 20.

Further, the plurality of stator teeth 22 are uniformly distributed along the radial direction of the stator yoke 23, and any through hole 233 is provided at the middle part (i.e. the angular bisector) of two adjacent stator teeth 22, as shown in fig. 6, the structure is more regular.

An embodiment of the third aspect of the present invention provides a stator 2 comprising: a stator core 20 and a winding 21 as in any of the second aspect embodiments. The winding 21 is wound around the tooth body of the stator core 20.

The stator 2 provided in the embodiment of the third aspect of the present invention includes the stator core 20 in any one of the embodiments of the second aspect, so that all the advantages of any one of the embodiments described above are achieved, and details are not repeated herein.

Further, the winding 21 is wound around the tooth body of the stator tooth 22 and is located on the yoke end surface 232 of the stator yoke 23, as shown in fig. 8 and 10. The number of the windings 21 may be plural, and the coil shapes of the plural windings 21 may be the same or different. The windings 21 may be one, two or more sets.

In some embodiments of the invention, in particular, the stator 2 comprises: a stator core 20 and at least one winding 21. The stator core 20 includes a stator yoke 23 and at least one stator tooth 22. The stator yoke 23 is laminated in the axial direction. Each stator tooth 22 is radially stacked along the stator yoke 23 by a plurality of stator tooth laminations. The stator teeth 22 include a stator tooth body and a stator tooth tip, and the stator tooth tip spans of the plurality of stator tooth laminations are non-uniform. Wherein, each stator tooth 22 is arranged along the axial direction of the stator yoke 23, the stator tooth 22 is detachably connected with the stator yoke 23, the stator yoke 23 is provided with a stator yoke slot 231 and/or a stator boss which are matched with the shape of the stator tooth 22, and the stator tooth 22 passes through the stator yoke slot 231 and/or the stator boss to form the stator core 20. The winding 21 is wound on the stator tooth body and is positioned on the end surface of the stator yoke part 23, and the winding 21 can be one set, two sets or multiple sets.

The stator 2 provided by the embodiment comprises a stator core 20, wherein the stator core 20 comprises a stator yoke portion 23, at least one stator tooth 22 and at least one winding 21, that is, the number of the stator teeth 22 and the winding 21 can be one or more, each stator tooth 22 is arranged along the axial direction of the stator yoke portion 23, and each stator tooth 22 is detachably connected with the stator yoke portion 23, so that the winding 21 is not limited by the shape of the stator core 20 when being wound, each stator tooth 22 can be connected with the stator yoke portion 23 after the winding 21 is wound, the winding mode is flexible, and the winding efficiency of the winding 21 is improved.

In addition, the size of the stator teeth 22 or the distance between the stator teeth 22 is reasonably arranged to adjust the size of the winding slots, and the number of the windings 21 can be flexibly set, so that the power level of the stator core 20 can be reasonably adjusted, and the problem that the power level of the stator core 20 is limited due to the single size of the winding slots in the prior art is solved.

Moreover, when the stator teeth 22 are assembled with the stator yoke 23, each stator tooth 22 directly penetrates through the stator yoke slot 231 matched with the shape of the stator tooth 22 or the stator teeth 22 are clamped with the stator boss, even a part of the plurality of stator teeth 22 can penetrate through the stator yoke slot 231, and the rest of the stator teeth 22 are clamped with the stator boss.

It should be noted that a plurality of windings 21 may be provided, and the coil shapes of the plurality of windings 21 may be the same or different.

In the above embodiment, the stator teeth 22 specifically include a plurality of stator tooth laminations stacked radially along the stator yoke portion 23, and the thickness D (D1, D2, D3 …) of the plurality of stator tooth laminations can be flexibly adjusted according to specific use scenarios and requirements of machining and performance optimization.

In the above embodiment, the stator teeth 22 specifically include a stator tooth body and a stator tooth tip, and the stator tooth tip spans of the various stator tooth laminations are not uniform, and can be flexibly adjusted according to specific use scenarios and requirements for optimization of processing and performance. Alternatively, the plurality of types of stator tooth laminated stator tooth tip spans L (L1, L2, L3 …) are arranged such that the minimum spacing S (S1, S2, S3 …) between adjacent teeth of each type of stator tooth laminates is the same.

In the above embodiment, the stator teeth 22 specifically include the stator tooth body and the stator tooth tip, and further, the stator tooth body structures of the various stator tooth laminations are identical, and specifically, the stator tooth body widths H and the profile shapes of the various stator tooth laminations are identical.

In the above embodiment, the stator yoke slot 231 may alternatively penetrate at least one end surface of the stator yoke 23 in the axial direction.

The stator yoke slot 231 may axially penetrate through one end surface of the stator yoke 23, or may axially penetrate through two end surfaces of the stator yoke 23, that is, the stator tooth 22 may be inserted into the stator yoke slot 231 penetrating through one end surface of the stator yoke 23, or may be inserted into the stator yoke slot 231 penetrating through two end surfaces of the stator yoke 23, so that the connection manner between the stator tooth 22 and the stator yoke 23 is various, and the assembly manner of the winding 21 is flexible, so as to meet different requirements of users.

In the above-described embodiment, alternatively, the stator yoke slots 231 are spaced from the outer circumferential surface of the stator yoke 23 in the radial direction, and the stator yoke slots 231 are spaced from the inner circumferential surface of the stator yoke 23 in the radial direction; or the stator yoke slot 231 communicates with the outer circumferential surface and/or the inner circumferential surface of the stator yoke 23.

The stator yoke slots 231 are spaced from the outer circumferential surface and the inner circumferential surface of the stator yoke 23 in the radial direction, that is, the stator yoke slots 231 penetrate through the stator yoke 23 and do not communicate with the outer circumferential surface of the stator yoke 23, the stator teeth 22 are inserted into the stator yoke slots 231 in the axial direction of the stator yoke 23 to be connected with the stator yoke 23, the stator teeth 22 are prevented from being separated from the stator yoke slots 231 along the outer circumferential surface or the inner circumferential surface of the stator yoke 23, and the connection reliability of the stator teeth 22 and the stator yoke 23 is improved.

The stator yoke slots 231 are communicated with the outer circumferential surface or the inner circumferential surface of the stator yoke 23, so that the stator teeth 22 can be inserted into the stator yoke slots 231 from the outer circumferential surface or the inner circumferential surface of the stator yoke 23, the connection manner is flexible, and the assembly between the stator teeth 22 and the stator yoke 23 is convenient.

The stator yoke slots 231 communicate with both the outer circumferential surface and the inner circumferential surface of the stator yoke 23, and the stator teeth 22 may be inserted into the stator yoke slots 231 in the axial direction or the radial direction from the outer circumferential surface or the inner circumferential surface to form the complete stator core 20.

In the above embodiments, the stator teeth tips are provided at the end of the stator teeth body. Optionally, the stator tooth point and the stator tooth body are integrally formed, so that the structure of a product is simplified, the integrity of the product is better, the connecting step of the stator tooth point and the stator tooth body is omitted, and the assembly efficiency of the product is further improved.

In the above embodiment, optionally, the number of the stator teeth tips is one, and the stator teeth tips are provided at one end of the stator teeth body.

Optionally, the number of the stator tooth tips is two, and two ends of the stator tooth body are respectively provided with one stator tooth tip.

In this embodiment, the number of the stator teeth tips arranged on each stator tooth body can be adjusted according to actual requirements, specifically, one stator tooth tip can be arranged on one stator tooth body, and two stator tooth tips can be arranged on one stator tooth body.

It should be noted that, two stator tooth tips may be respectively disposed on the end face of the stator tooth body.

In the above embodiment, further, the stator 2 further includes: and the positioning grooves and the positioning ribs are matched in shape, wherein one of the positioning grooves and the positioning ribs is arranged on the stator teeth 22, and the other one of the positioning grooves and the positioning ribs is arranged on the stator yoke slot 231 and/or the stator boss so as to limit the position of the stator teeth 22 in the stator yoke 23.

Through set up the protruding muscle of location on stator tooth 22, set up positioning groove on stator yoke slot 231 or stator boss, perhaps all set up positioning groove on stator yoke slot 231 and stator boss, when then stator tooth 22 and stator yoke 23 assemble, will fix a position the protruding muscle and insert positioning groove in, play limiting displacement to prevent that stator tooth 22 and stator yoke slot 231 from taking place relative motion, and then improved the stability that stator tooth 22 and positioning yoke slot are connected.

In a similar way, also can set up positioning groove on stator tooth 22, set up the protruding muscle of location on stator yoke slot 231 or stator boss, perhaps all set up the protruding muscle of location on stator yoke slot 231 and stator boss, when stator tooth 22 assembles with stator yoke portion 23, will fix a position the protruding muscle and insert positioning groove in, play limiting displacement to prevent that stator tooth 22 and stator yoke portion 23 from taking place relative motion, and then improved the stability that stator tooth 22 is connected with positioning yoke portion.

In the above embodiment, the number of the stator yoke slots 231 is plural, and the plural stator yoke slots 231 are provided uniformly on the stator yoke 23 around the axis of the stator core 20.

The number of the stator yoke slots 231 is plural, and the plural stator yoke slots 231 are uniformly arranged on the stator yoke 23 around the axis of the stator core 20, so that the structure of the product is more regular, the number of the stator yoke slots 231 is increased, correspondingly, the number of the stator teeth 22 is also plural, and the plural stator teeth 22 are inserted into the plural stator yoke slots 231 corresponding thereto, thereby increasing the number of the windings 21, and further contributing to the improvement of the power level of the stator core 20.

In the above embodiment, the cross section of the stator yoke portion 23 is one of a circle, an ellipse, and a regular polygon.

The cross-section of stator yoke portion 23 is one in circular, oval, regular polygon, and the structure is all comparatively regular, and the machine-shaping of being convenient for is suitable for batch production, and helps improving the pleasing to the eye degree of product.

In the above embodiment, the stator yoke 23 may be a whole block integrated into one piece, and may also be formed by splicing a plurality of yoke segments, which is favorable for improving the material utilization rate of the stator yoke 23.

In the above embodiment, the through holes 233 are uniformly distributed at the symmetric line of the stator yoke slot 231 and/or the stator boss adjacent to the stator yoke 23, and may be used for welding the edge of the stator yoke 23, or facilitating the fixed connection of the stator yoke 23 with a casing or the like, or for passing the wire through the winding 21.

As shown in fig. 8 and 10, an embodiment of the fourth aspect of the present invention provides a motor 1 including: at least one stator 2 and at least one rotor 3 as in the embodiment of the third aspect, each rotor 3 being provided in correspondence with the stator 2.

The motor 1 provided by the embodiment of the fourth aspect of the present invention includes the stator 2 provided by the embodiment of the third aspect, so that all the advantages of any of the above embodiments are provided, and details are not described herein again.

It should be noted that the category of the motor 1 includes, but is not limited to, a single-stator single-rotor motor (as shown in fig. 8), a single-stator double-rotor motor (as shown in fig. 10), a single-rotor double-stator motor, a double-stator double-rotor motor, and the number of the stators 2 and the number of the rotors 3 may be one or more.

Alternatively, the number of stators 2 is smaller than the number of rotors 3, and any stator 2 is provided between two adjacent rotors 3.

The quantity of stator 2 is less than the quantity of rotor 3, and arbitrary two adjacent rotors 3 share a stator 2, and the structure is comparatively regular, helps simplifying the structure of product, and is convenient for rotor 3 and stator 2's assembly.

Alternatively, the number of stators 2 is greater than the number of rotors 3, and any one rotor 3 is provided between two adjacent stators 2.

The quantity of stator 2 is greater than the quantity of rotor 3, and arbitrary two adjacent stators 2 share a rotor 3, and the structure is comparatively regular, helps simplifying the structure of product, is convenient for rotor 3 and stator 2's assembly.

It will be understood that the number of stators 2 is denoted as a first number and the number of rotors 3 is denoted as a second number. When the number of the rotors 3 is greater than that of the stators 2, and the second number is N +1, and the first number is N, the N +1 rotors 3 may be arranged at intervals, and then the N stators 2 are respectively inserted between two adjacent rotors 3 to form the motor 1.

Or, when the number of the stators 2 is greater than the number of the rotors 3, and the second number is N, and the first number is N +1, the N +1 stators 2 may be arranged at intervals, and then the N rotors 3 are respectively inserted between two adjacent stators 2 to form the motor 1.

Alternatively, the number of stators 2 is at least two, the number of stator teeth 22 of at least two stators 2 is the same, or the number of phases of at least two stators 2 is the same.

The number of stators 2 is at least two and the number of stator teeth 22 of at least two stators 2 is the same, facilitating the assembly of the stator teeth 22 with the stator yoke 23, or the number of phases of at least two stators 2 is the same, i.e. the number of windings 21 on each stator 2 is the same, so that the power level on each stator 2 is the same.

Alternatively, the number of stators 2 is at least two, the number of stator teeth 22 of at least two stators 2 is different, or the number of phases of at least two stators 2 is different.

The number of stators 2 is at least two, the number of stator teeth 22 of at least two stators 2 is different, or the number of phases of at least two stators 2 is different, i.e. the number of windings 21 on each stator 2 is different, so that a user can meet the requirement of actual power by performing reasonable windings 21 on each stator 2.

In the above embodiment, optionally, the number of the rotors 3 is plural, the plural rotors 3 rotate independently of each other, and the rotation axes of at least two rotors 3 are coaxial, parallel or perpendicular.

The number of the rotors 3 is set to be a plurality of, the rotating shafts of at least two rotors 3 can be coaxially arranged or arranged in parallel or vertically, the arrangement mode is various, and the installation mode is flexible.

Wherein, one or more rotors 3 can be permanent magnet rotors 3 or squirrel cage rotors 3 or salient pole rotors 3, and the number of pole pairs of at least two rotors 3 is different, or the number of pole pairs of at least two rotors 3 is the same.

The number of rotors 3 is a plurality of, and at least two rotors 3 can set up the same number of pole pairs, also can set up different number of pole pairs to satisfy the needs of different operating modes.

Optionally, the rotor 3 is a permanent magnet rotor 3, the permanent magnet rotor 3 includes a yoke portion of the rotor 3 and permanent magnet steel, and the permanent magnet steel is attached to the yoke portion of the rotor 3 and located between the yoke portion of the rotor 3 and the tooth tips of the stator 2. The scheme can meet the specific requirements of products.

Such as: the number of the rotors 3 is two, and as shown in fig. 10, the two rotors 3 are respectively referred to as a first rotor 3 and a second rotor 3, the yoke portion of the rotor 3 and the permanent magnet steel of the first rotor 3 are respectively referred to as a first rotor yoke portion 31 and a first permanent magnet steel 32, and the yoke portion of the rotor 3 and the permanent magnet steel of the second rotor 3 are respectively referred to as a second rotor yoke portion 33 and a second permanent magnet steel 34.

Alternatively, as shown in fig. 8, the number of the rotor 3 is one, and the yoke portions of the rotor 3 and the permanent magnet steels of the rotor 3 may also be denoted as a first rotor yoke portion 31 and a first permanent magnet steel 32.

Optionally, the rotor 3 is a permanent magnet rotor 3, the permanent magnet rotor 3 only comprises a plurality of permanent magnet steel magnets, the permanent magnet steel magnets are magnetized in a Halbach mode, the permanent magnet steel magnets are annularly arranged, and an injection molding mode is adopted to form an integrated structure. This solution saves material usage of the yoke part of the rotor 3.

An embodiment of a fifth aspect of the present invention provides a wind turbine, including: a body and a motor 1 as in any one of the fourth aspect embodiments, the motor 1 being mounted on the body.

The fan provided by the embodiment of the fifth aspect of the present invention includes the motor 1 of any one of the embodiments of the first aspect, so that all the advantages of any one of the embodiments are provided, and details are not repeated herein.

Specifically, the fuselage includes shell and impeller, and the motor is installed in the shell of fan, and the output shaft fixed connection of impeller and motor. Of course, the motor 1 provided in the present application may also be used in a vehicle, a compressor, or other devices.

In summary, the present application has the following beneficial effects: according to the winding device, each stator tooth is detachably connected with the stator yoke, so that the winding is not limited by the shape of a stator iron core when being wound, the winding mode is flexible, and the winding efficiency of the winding is improved; in addition, the size of the stator teeth or the space between the stator teeth is reasonably arranged to adjust the size of the winding slots, and the number of windings can be flexibly set, so that the power level of the stator core can be reasonably adjusted; and the stepped stator tooth tip end surface formed by the various stator tooth laminations can effectively improve the utilization rate of the rotor permanent magnet on one hand, thereby improving the torque density of the motor, and on the other hand, the flexibly variable various stator tooth laminations can effectively improve the counter electromotive force of the motor and reduce the cogging torque of the motor through a certain optimization design method.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator tooth for a stator core, comprising:

the tooth body is connected with a stator yoke part of the stator core and extends along the axial direction of the stator yoke part; and

tooth point, with the terminal surface of tooth body links to each other, including two at least sub point portions, two at least sub point portions are followed stator core's radial arrangement, and adjacent sub point portion is followed at least one terminal surface at stator core circumference's both ends staggers each other, makes the tooth point is followed stator core circumference's at least one end forms the stairstepping structure.

2. The stator tooth according to claim 1,

the tooth body has the median vertical plane, the median vertical plane is followed stator core's axial extension, sub sharp portion is followed the terminal surface at stator core circumference's both ends is about the median vertical plane symmetry, and is adjacent sub sharp portion is followed stator core circumference's span L has the difference, makes adjacent sub sharp portion is followed the terminal surface at stator core circumference's both ends staggers each other.

3. The stator tooth according to claim 2,

and the edge of the stator core is radial from inside to outside, and the sub-tip part is gradually increased along the circumferential span L of the stator core.

4. The stator tooth according to any one of claims 1 to 3,

the tooth body is followed stator core's axial extension, the tooth body includes a plurality of edges stator core's the sub-body portion of radially arranging, the quantity of sub-body portion with the quantity of sub-point portion equals and the one-to-one, sub-body portion with correspond sub-point portion integrated into one piece.

5. The stator tooth according to any one of claims 1 to 3,

the tooth body is provided with a positioning part which is used for adapting to a matching part arranged on the stator yoke part;

wherein the positioning part comprises a positioning protrusion for fitting the mating part configured as a positioning groove; and/or, the positioning part comprises a positioning groove for adapting to the matching part configured as a positioning protrusion.

6. The stator tooth according to any one of claims 1 to 3,

the number of the tooth tips is one, and one stator tooth tip is arranged on one end face of the tooth body; or

The quantity of prong is two, two the prong is established two the tooth body is carried on the back of the body and is set up on two terminal surfaces.

7. A stator core comprising the stator teeth according to any one of claims 1 to 6.

8. The stator core according to claim 7,

the stator yoke is characterized in that the number of the stator teeth is multiple, and the stator teeth are uniformly distributed along the circumferential direction of the stator yoke.

9. The stator core according to claim 8,

the minimum spacing S between corresponding sub-tip portions of any adjacent stator teeth is equal.

10. The stator core according to any one of claims 7 to 9,

the stator yoke is provided with a stator yoke groove matched with the tooth body of the stator tooth in shape, and the tooth body is matched with the stator yoke groove in an inserted mode.

11. The stator core according to claim 10,

the stator yoke slot extends through at least one axial end face of the stator yoke; and/or

The stator yoke slot has a distance from the inner circumferential surface and the outer circumferential surface of the stator yoke in the radial direction of the stator core; alternatively, the stator yoke slot penetrates an inner circumferential surface and/or an outer circumferential surface of the stator yoke.

12. The stator core according to any one of claims 7 to 9,

the stator yoke portion be equipped with the stator boss of the shape looks adaptation of the tooth body of stator tooth, the stator boss with tooth body looks joint.

13. The stator core according to any one of claims 7 to 9,

the stator yoke part is of an integrated structure; or

The stator yoke portion comprises a plurality of split type sub-yoke portions, and the plurality of sub-yoke portions are spliced to form the stator yoke portion.

14. The stator core according to any one of claims 7 to 9,

and a through hole is formed in the stator yoke part and is positioned between every two adjacent stator teeth.

15. The stator core according to claim 14,

the number of the through holes is a plurality of, and a plurality of the through holes are distributed at intervals along the circumferential direction of the stator yoke.

16. A stator comprising the stator core according to any one of claims 7 to 15.

17. An electric machine, comprising:

at least one stator according to claim 16; and

at least one rotor, each rotor is arranged corresponding to the stator.

18. The electric machine of claim 17,

the number of the stators is less than that of the rotors, and any stator is arranged between two adjacent rotors; or

The number of the stators is larger than that of the rotors, and any one of the rotors is arranged between two adjacent stators.

19. The electric machine of claim 17,

the number of the stators is at least two, the number of the stator teeth of at least two stators is the same, or the number of the phases of at least two stators is the same; or

The number of the stators is at least two, the number of the stator teeth of at least two stators is different, or the number of the phases of at least two stators is different.

20. A fan comprising an electric machine as claimed in any one of claims 17 to 19.