CN219181383U

CN219181383U - Motor and electrical equipment

Info

Publication number: CN219181383U
Application number: CN202320268099.8U
Authority: CN
Inventors: 武谷雨
Original assignee: Midea Welling Motor Technology Shanghai Co Ltd; Welling Wuhu Motor Manufacturing Co Ltd
Current assignee: Midea Welling Motor Technology Shanghai Co Ltd; Welling Wuhu Motor Manufacturing Co Ltd
Priority date: 2023-02-14
Filing date: 2023-02-14
Publication date: 2023-06-13
Anticipated expiration: 2033-02-14

Abstract

The utility model provides a motor and an electrical device, wherein the motor comprises: rotor and stator, the stator includes stator core, and stator core includes a plurality of stator core towards the piece, and stator core towards the piece and includes: a stator yoke; a plurality of first stator teeth connected to an outer peripheral side of the stator yoke in a circumferential direction; the plurality of second stator teeth are connected to the outer peripheral side of the stator yoke part along the circumferential direction, the plurality of first stator teeth and the plurality of second stator teeth are arranged in a tooth mode, and the width of the first stator teeth is smaller than that of the second stator teeth; the stator further comprises a plurality of windings, any one of which is wound on a corresponding second stator tooth; the first stator tooth includes: the first tooth body is connected with the stator yoke part, and the width of the first tooth body is gradually increased along the direction deviating from the stator yoke part. Therefore, the installation space of the winding can be increased, the winding difficulty of the winding is reduced, the assembly efficiency of the product is improved, the slot filling rate of the motor is improved, and the assembly precision of the winding is improved.

Description

Motor and electrical equipment

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to a motor and electrical equipment.

Background

The small motor in the prior art has the advantages that the size of the motor is smaller, so that the size of a stator in the motor is smaller, the space of the stator for winding a winding is smaller, the winding process difficulty is increased, and the slot filling rate of the motor is lower.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art or related art

To this end, a first object of the utility model is to propose an electric machine.

A second object of the present utility model is to propose an electrical device.

To achieve at least one of the above objects, according to a first aspect of the present utility model, there is provided an electric machine comprising: a rotor including a stator slot; the stator is located the stator inslot, and the stator includes stator core, and stator core includes the stator core towards piece of a plurality of stacks setting, and arbitrary stator core towards piece includes: a stator yoke; a plurality of first stator teeth connected to an outer peripheral side of the stator yoke in a circumferential direction; the plurality of second stator teeth are connected to the outer peripheral side of the stator yoke part along the circumferential direction, the plurality of first stator teeth and the plurality of second stator teeth are arranged in a tooth mode, and the width of the first stator teeth is smaller than that of the second stator teeth; the stator further comprises a plurality of windings, any one of which is wound on a corresponding second stator tooth; any of the first stator teeth includes: the first tooth body is connected with the stator yoke part, and the width of the first tooth body is gradually increased along the direction deviating from the stator yoke part.

The application provides a motor, including stator and rotor, wherein, the rotor includes the stator groove, and the stator is located the stator inslot, and rotor and the coaxial setting of stator, rotor can rotate for the stator. The stator comprises a stator core, wherein the stator core comprises a plurality of stator core punching sheets, and the plurality of stator core punching sheets are stacked to form the stator core. The stator core punching sheet comprises a stator yoke, a plurality of first stator teeth and a plurality of second stator teeth, wherein the first stator teeth and the second stator teeth are connected with the stator yoke, specifically, the first stator teeth are circumferentially connected to the outer peripheral side of the stator yoke, the second stator teeth are circumferentially connected to the outer peripheral side of the stator yoke, the first stator teeth and the second stator teeth are arranged at intervals, and any adjacent stator teeth and second stator teeth form a stator slot.

Further, the stator for the stator core lamination further comprises a plurality of windings. In the conventional stator, the number of windings is the same as the number of stator teeth, the windings are arranged in one-to-one correspondence with the stator teeth, and the windings are wound on the corresponding stator teeth to fix the windings. However, as the motor is miniaturized, the size of the stator is reduced, and the space between two adjacent stator teeth is also reduced, which results in a reduction in the installation space of the winding and an increase in the winding difficulty of the winding. In order to solve the difficult problem of winding in the small-size motor, this application twines the winding on the second stator tooth to do not twine the winding on first stator tooth, so, multiplicable winding's installation space has reduced the winding degree of difficulty of winding, reduces the quantity of winding by half, has promoted the production efficiency of product, can also promote the assembly precision of winding, promotes the performance of product. Further, because each winding is wound on the second stator tooth, and the first stator tooth and the second stator tooth are arranged in a spaced mode, namely, the first stator tooth is arranged between any two adjacent windings, the windings are separated through the first stator tooth, and in this case, even if one winding generates a problem, the adjacent windings are not influenced, and the reliability of the product is improved.

Further, in order to further increase the installation space of the windings, the present application defines the dimensions of the first stator teeth and the second stator teeth. Specifically, the width of the first stator teeth is smaller than the width of the second stator teeth. It is understood that, since the winding is wound on the second stator tooth and the winding is not wound on the first stator tooth, that is, the smaller the width of the first stator tooth, the larger the space of the stator slot, the larger the installation space of the winding and the smaller the winding difficulty of the winding, the stator slot for accommodating the winding is defined by the second stator tooth and the adjacent first stator tooth. Therefore, in order to further reduce the winding degree of difficulty of winding, the width of this application with first stator tooth sets up to be less than the width of second stator tooth to can make the size of stator groove increase to some extent, and then increase the installation space of winding, thereby further reduced the winding degree of difficulty of winding. In addition, since the windings are not wound on the first stator teeth, the stress of the first stator teeth is smaller than that of the second stator teeth, and even if the width of the first stator teeth is smaller than that of the second stator teeth, the risk of breakage of the first stator teeth due to insufficient strength is avoided.

Further, in designing the width of the first stator tooth and the width of the second stator tooth, it is necessary to consider the relationship between the pole arc angle occupied by the first stator tooth and the pole arc angle occupied by the second stator tooth. Specifically, the number of the first stator teeth is Z As the number of the second stator teeth, any one of the first stator teeth and the adjacent second stator teeth form a stator tooth part, the tooth arc angle occupied by each stator tooth part is As, and the tooth arc angle occupied by each stator tooth part is composed of the pole arc angle occupied by the first stator tooth contained therein and the pole arc angle occupied by the second stator tooth contained therein. Wherein the second stator tooth occupies a pole arc angle of 2×a1, the first stator tooth occupies a pole arc angle of 2×a2, as=360 °/z=2 (a1+a2). The distribution of the pole arc angle occupied by the first stator tooth and the pole arc angle occupied by the second stator tooth is closely related to the torque output capacity of the motor, and the magnitude of the pole arc angle occupied by the first stator tooth and the pole arc angle occupied by the second stator tooth is related to the widths of the first stator tooth and the second stator tooth. Accordingly, the appropriate distribution relationship of A1 and A2 may be selected to promote torque density of the electric machine, thereby designing the appropriate first stator tooth width and second stator tooth width according to A1 and A2.

Further, defining the structure of the first stator teeth, any one of the first stator teeth includes a first tooth body connected to the stator yoke, and the width of the first tooth body gradually increases along a direction away from the stator yoke. The first tooth body is constructed like a trapezoid, and the two sides of the first stator tooth can be provided with a protruding structure or not provided with a protruding structure. The width of the first stator teeth changes in the radial direction of the stator core laminations, and in particular, the width of the first tooth body gradually increases in the direction away from the stator yoke. It will be appreciated that if the widths of the respective positions of the first tooth in the radial direction of the stator core lamination are the same, the widths of the stator slots become smaller as they are located closer to the region of the center of the stator core lamination, which results in an increase in winding difficulty of the winding. In order to further increase the distance between first stator tooth and the second stator tooth, increase the space of stator groove, this application constructs first tooth body for along deviating from the direction width of stator yoke portion and gradually increasing, be close to the region in stator core towards piece center promptly, the width of first tooth body is littleer more, so, can make the space increase of stator groove in stator core towards piece center region, and then reduce the winding degree of difficulty of winding, promote the assembly efficiency of product, still promoted the assembly precision of winding, make the product performance promote to some extent.

And moreover, by constructing the first tooth body into a structure with one end being narrow and one end being wide, the narrower winding part in the stator slot can be improved to a certain extent, so that the winding arrangement of the winding is more uniform from the radial inner side to the radial outer side. Through set up the different first stator tooth of width and second stator tooth in stator core towards the piece to twine the winding in the motor on the wider second stator tooth of width, thereby can increase the size of the stator groove between first stator tooth and the second stator tooth through setting up the less first stator tooth of width, increase the installation space of winding, and then reduce the winding degree of difficulty of winding, promote the assembly efficiency of product, promoted the groove full rate of motor, still promoted the assembly precision of winding, make the product performance promote to some extent. Moreover, because the windings are all wound on the second stator teeth, the adjacent two windings can be separated through the first stator teeth, even if one winding is in a problem, the adjacent other windings cannot be influenced, and the reliability of the product is improved. Through the first tooth body structure with first stator tooth is the structure that increases gradually along the direction width that deviates from stator yoke to the space in multiplicable stator groove, and then increased the installation space of winding, reduced the winding degree of difficulty of winding, promote the assembly efficiency of product, still make the wire winding of winding arrange from radial inboard to radial outside more even, promoted the assembly precision of winding, make the product performance promote to some extent.

The motor according to the utility model can also have the following distinguishing technical characteristics:

in the above technical solution, further, any one of the first stator teeth further includes: and the first tooth crown is connected with one end of the first tooth body, which is away from the stator yoke part, and protrudes from two sides of the first tooth body.

In this embodiment, another structure of the first stator tooth is defined. The first stator tooth may be constructed in a structure including only the first tooth body, and the first stator tooth may be constructed in a structure including the first tooth body and the first crown connected to the first tooth body. In the case that the first stator tooth includes a first crown, the first crown is connected to an end of the first tooth body facing away from the stator yoke. Specifically, the width of the first crown is larger than that of the first tooth body, and the first crown protrudes out of two sides of the first tooth body. As can be appreciated, the first stator tooth and the adjacent second stator tooth form a stator slot, and the first tooth crown is connected to one end of the first tooth body away from the stator yoke, so that the first tooth crown is located at a notch of the stator slot. The stator groove is used for accommodating the winding, and the first tooth crowns are protruded on two sides of the first tooth body, so that the winding can be limited through the protruded first tooth crowns, the winding is prevented from being separated from the stator groove, and the safety and reliability of a product are improved.

Through set up the first crown that protrudes in first tooth body in first stator tooth to can carry out spacingly through first crown to the winding that sets up in the stator inslot, avoid the winding to deviate from in the stator groove, promoted the security and the reliability of product.

In the above technical solution, further, any one of the second stator teeth includes: the second tooth body is connected with the stator yoke part; and the second tooth crown is connected with one end of the second tooth body, which is away from the stator yoke part, and protrudes out of two sides of the second tooth body, and at least one adjusting groove is formed in the edge of one side of the second tooth crown, which is away from the second tooth body.

In this embodiment, the structure of the second stator teeth is defined. Any second stator includes second tooth body and second tooth crown, and wherein, second tooth body links to each other with stator yoke, and second tooth body extends along radial direction towards the direction that deviates from stator yoke, and the second tooth crown is connected in the one end that second tooth body deviates from stator yoke. Specifically, if the winding is wound around the second tooth body and the second stator tooth is not provided with a structure protruding from the second tooth body, the winding is likely to be separated from the second tooth body. In order to avoid the problem, this application has still set up the second crown in the second stator tooth, because the second crown is connected in the one end that the second tooth body deviates from stator yoke to the protrusion is in the both sides of second tooth body, thereby can carry out spacingly to the winding through the second crown, avoids the winding to drop on one's body from the second tooth, in order to promote the security and the reliability of product.

Further, at least one adjusting groove is arranged at the edge of one side of the second tooth crown, which is away from the second tooth body, wherein the adjusting groove is recessed at the edge of the second tooth crown. The number of the second adjusting grooves may be one or plural, and in the case that the number of the second adjusting grooves is plural, the plurality of second adjusting grooves are sequentially provided along the edge of the second crown facing away from the side of the stator yoke. The second regulating groove is used for regulating the torque pulsation of the motor, the torque pulsation of the motor can be reduced by arranging the second regulating groove, and the running stability of the motor is improved.

In the above technical solution, further, in the case that the adjusting slot in any one of the second crowns is one, the center line of the adjusting slot coincides with the center line of the second crown.

In this embodiment, the installation position of the adjustment groove is defined. Specifically, in the case where the adjustment groove in any one of the second crowns is one, the center line of the adjustment groove coincides with the center line of the second crown. Compared with a structure that the adjusting grooves are arranged on two sides close to the second tooth crown, the adjusting grooves are arranged at the center positions of the second tooth crown, so that the center line of the adjusting grooves is overlapped with the center line of the second tooth crown, the adjusting effect of the adjusting grooves on the torque pulsation of the motor can be further improved, the torque pulsation of the motor is further reduced, and the running stability of the motor is improved.

In one possible technical solution, a notch of a stator slot is formed between a first crown of a first stator tooth and a second crown of a second stator tooth, the notch of the stator slot is formed by a notch width occupied by the first stator tooth and a notch width occupied by the second stator tooth, wherein the notch width of the stator slot is Ds, the notch width occupied by the second stator tooth is D1, and the notch width occupied by the first stator tooth is D2, ds=d1+d2.

In the above technical solution, further, the width of the second tooth body gradually increases in a direction away from the stator yoke.

In this embodiment, the structure of the second tooth body is defined. The second tooth body is constructed like a trapezoid structure, and the width of the second tooth body is changed along the radial direction of the stator core punching sheet. Specifically, the width of the second tooth body gradually increases in a direction away from the stator yoke. It will be appreciated that if the widths of the respective positions of the second tooth in the radial direction of the stator core lamination are the same, the widths of the stator slots become smaller as they are located closer to the center of the stator core lamination, which results in an increase in winding difficulty of the winding. In order to further increase the distance between the first stator tooth and the second stator tooth and increase the space of the stator slot, the second tooth body is configured in the present application to gradually increase in width in the direction away from the stator yoke, i.e. the closer to the area of the stator core lamination center, the smaller the width of the second tooth body. Therefore, the space of the stator slot in the area of the center of the stator core punching sheet can be increased, the winding difficulty of the winding is further reduced, the assembly efficiency of the product is improved, the assembly precision of the winding is also improved, and the performance of the product is improved to some extent.

Through constructing the second tooth body into the structure that gradually increases along the direction width that deviates from stator yoke portion to the space of multiplicable stator groove, and then increased the installation space of winding, reduced the winding degree of difficulty of winding, promoted the assembly efficiency of product, still promoted the assembly precision of winding, made the product performance promote to some extent.

In the above technical solution, further, the rotor rotates from the first end of the second crown to the second end of the second crown, and any one of the second crowns includes: the first sub-crown is positioned at the first end of the second crown and is provided with a first arc-shaped outer edge; the second sub-crown is positioned at the second end of the second crown and is provided with a second arc-shaped outer edge, and the curvature radius of the first arc-shaped outer edge is smaller than that of the second arc-shaped outer edge.

In this embodiment, the structure of the second crown is further defined. The motor used by the stator core punching sheet further comprises a rotor, wherein the rotor and the stator core punching sheet of the motor are coaxially arranged and can rotate relative to the stator core punching sheet, and specifically, the rotor rotates from the first end of the second tooth crown to the second end of the second tooth crown. Any second tooth crown comprises a first sub tooth crown and a second sub tooth crown, wherein the first sub tooth crown and the second sub tooth crown are respectively positioned at two ends of the second tooth crown, the first sub tooth crown is positioned at the first end of the second tooth crown, and the second sub tooth crown is positioned at the second end of the second tooth crown. The first sub-crown and the second sub-crown are both configured to be arc-shaped on a side facing away from the stator yoke, the first sub-crown has a first arc-shaped outer edge, the second sub-crown has a second arc-shaped outer edge, both the first arc-shaped outer edge and the second arc-shaped outer edge are located on a side facing away from the stator yoke, the first arc-shaped outer edge extends from the notch of the adjusting groove to the end of the first sub-crown, and the second arc-shaped outer edge extends from the notch of the adjusting groove to the end of the second sub-crown. In order to further reduce the torque pulsation of the motor, the curvature radius of the first arc-shaped outer edge and the curvature radius of the second arc-shaped outer edge are correspondingly limited, and particularly, the curvature radius of the first arc-shaped outer edge is smaller than the curvature radius of the second arc-shaped outer edge, so that the torque pulsation of the motor is reduced, and the running stability of the motor is further improved.

In the above technical solution, further, any one of the first crowns includes: the third sub-crown is positioned at the first end of the first crown and is provided with a third arc-shaped outer edge; and the fourth sub-crown is positioned at the second end of the first crown and is provided with a fourth arc-shaped outer edge, and the curvature radius of the third arc-shaped outer edge and/or the curvature radius of the fourth arc-shaped outer edge is smaller than that of the arc-shaped outer edge of the stator core assembly.

In this technical solution, the structure of the first crown is further defined. Any first tooth crown comprises a third sub tooth crown and a fourth sub tooth crown, and the third sub tooth crown and the fourth sub tooth crown are respectively positioned at two ends of the first tooth crown. The third sub-crown has a third arc-shaped outer edge, the fourth sub-crown has a fourth arc-shaped outer edge, and the third arc-shaped outer edge and the fourth arc-shaped outer edge are both positioned at one side of the first crown facing away from the stator yoke. In order to further reduce torque pulsation of the motor, the curvature radius of the third arc-shaped outer edge and the curvature radius of the fourth arc-shaped outer edge are correspondingly limited, and in particular, the curvature radius of the third arc-shaped outer edge and/or the curvature radius of the fourth arc-shaped outer edge are smaller than the curvature radius of the arc-shaped outer edge of the stator core assembly, so that torque pulsation of the motor is reduced, and running stability of the motor is further improved.

In the above technical solution, further, the rotor includes: a rotor yoke; the rotor magnets are sequentially connected with the rotor yoke along the circumferential direction, a space is reserved between any two adjacent rotor magnets, and the rotor magnets are arranged on one side of the rotor yoke, which faces the stator.

In this embodiment, the structure of the rotor is defined. The rotor comprises a rotor yoke and a plurality of rotor magnets, and the plurality of rotor magnets are sequentially connected with the rotor yoke along the circumferential direction. Specifically, the plurality of rotor magnets are uniformly distributed inside the rotor yoke along the circumferential direction of the rotor.

In one possible solution, the rotor magnet is configured as a multipole magnet ring, which is made of permanent magnet material and forms a ring structure, assembled with the rotor yoke, forming a nested structure. The integrated magnetic ring is beneficial to simplifying assembly procedures and improving manufacturing efficiency. Specifically, the multipolar magnetic ring adopts a rubber magnetic strip and is assembled with the rotor yoke part in a bending and rolling way.

Further, a space is reserved between any two adjacent rotor magnets, and torque pulsation optimization can be achieved by arranging reasonable spaces among a plurality of rotor magnets.

In one possible technical solution, the plurality of rotor magnets and the rotor yoke are integrally molded and fixed, so that the motor performance degradation caused by the process error accumulation can be reduced.

In the above technical solution, further, two ends of any rotor magnet have a first arc inner edge, and a radius of curvature of the first arc inner edge is greater than a radius of curvature of the arc inner edge of the rotor.

In this embodiment, the structure of the rotor magnet is further defined. The two ends of any rotor magnet are provided with first arc inner edges which are arranged on one side facing the stator. In order to further reduce the torque pulsation of the motor, the curvature radius of the inner edge of the first arc is correspondingly limited, and particularly, the curvature radius of the inner edge of the first arc is larger than that of the inner edge of the arc of the rotor, so that the torque pulsation of the motor is reduced, and the running stability of the motor is further improved.

In one possible solution, the first arc inner edge is configured as an arc cutting structure, which may be arc-shaped or right-angle cut, and may be symmetrical or asymmetrical.

The fifth aspect of the utility model also proposes an electrical device comprising the motor according to the first aspect of the utility model.

The electrical equipment provided by the second aspect of the utility model has all the beneficial effects of the motor because the electrical equipment comprises the motor provided by the first aspect of the utility model.

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

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 shows one of the schematic structural views of a stator core sheet according to an embodiment of the present utility model;

FIG. 2 shows a second schematic structural view of a stator core lamination in accordance with one embodiment of the present utility model;

FIG. 3 shows one of the structural schematic diagrams of the motor of one embodiment of the utility model;

fig. 4 shows a second schematic structural view of the motor according to an embodiment of the present utility model.

The correspondence between the reference numerals and the component names in fig. 1 to 4 is:

100 stator core punching sheets, 110 stator yokes, 120 first stator teeth, 121 first tooth bodies, 122 first tooth crowns, 123 third sub tooth crowns, 124 fourth sub tooth crowns, 125 third arc outer edges, 126 fourth arc outer edges, 130 second stator teeth, 131 second tooth bodies, 132 second tooth crowns, 133 adjusting grooves, 134 first sub tooth crowns, 135 second sub tooth crowns, 136 first arc outer edges, 137 second arc outer edges, 200 motors, 210 stators, 211 windings, 220 rotors, 221 stator grooves, 222 rotor yokes, 223 rotor magnets, 224 first arc inner edges.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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

A motor 200 and an electric device provided according to some embodiments of the present utility model are described below with reference to fig. 1 to 4.

In one embodiment according to the present application, as shown in fig. 1, 2 and 3, a first aspect of the present utility model proposes an electric machine 200 comprising: a rotor 220 including a stator groove 221; stator 210 is located in stator slot 221, and stator 210 includes stator core, and the stator core includes a plurality of stator core laminations 100 that range upon range of setting, and arbitrary stator core laminations 100 include: a stator yoke 110; a plurality of first stator teeth 120, the plurality of first stator teeth 120 being connected to an outer circumferential side of the stator yoke 110 in a circumferential direction; a plurality of second stator teeth 130, the plurality of second stator teeth 130 being circumferentially connected to an outer circumferential side of the stator yoke 110, the plurality of first stator teeth 120 being spaced apart from the plurality of second stator teeth 130, the width of the first stator teeth 120 being smaller than the width of the second stator teeth 130; the stator 210 further includes a plurality of windings 211, any one winding 211 being wound around a corresponding second stator tooth 130; any of the first stator teeth 120 includes: the first tooth 121, the first tooth 121 is connected to the stator yoke 110, and the width of the first tooth 121 gradually increases in a direction away from the stator yoke 110.

The motor 200 provided by the application comprises a stator 210 and a rotor 220, wherein the rotor 220 comprises a stator groove 221, the stator 210 is positioned in the stator groove 221, the rotor 220 is coaxially arranged with the stator 210, and the rotor 220 can rotate relative to the stator 210. The stator 210 includes a stator core including a plurality of stator core laminations 100 therein, the plurality of stator core laminations 100 being stacked to form the stator core. The structure of the stator core stamping 100 is defined below, and the stator core stamping 100 includes a stator yoke 110, a plurality of first stator teeth 120 and a plurality of second stator teeth 130, wherein the plurality of first stator teeth 120 and the plurality of second stator teeth 130 are connected to the stator yoke 110, specifically, the plurality of first stator teeth 120 are circumferentially connected to an outer peripheral side of the stator yoke 110, the plurality of second stator teeth 130 are circumferentially connected to an outer peripheral side of the stator yoke 110, the plurality of first stator teeth 120 are spaced apart from the plurality of second stator teeth 130, and any adjacent stator teeth and second stator teeth 130 are surrounded by a stator slot 221.

Further, the stator 210 in which the stator core segment 100 is used further includes a plurality of windings 211. In the conventional stator 210, the number of windings 211 is the same as the number of stator teeth, the windings 211 are disposed in one-to-one correspondence with the stator teeth, and the windings 211 are wound on the corresponding stator teeth to fix the windings 211. However, as the motor 200 is miniaturized, the size of the stator 210 is reduced, and the space between two adjacent stator teeth is also reduced, which results in a reduction in the installation space of the winding 211 and an increase in the difficulty of winding the winding 211. In order to solve the problem of winding difficulty of the winding 211 in the small motor 200, the winding 211 is wound on the second stator teeth 130, and the winding 211 is not wound on the first stator teeth 120, so that the installation space of the winding 211 can be increased, the winding difficulty of the winding 211 is reduced, the number of the winding 211 is halved, the production efficiency of a product is improved, the assembly precision of the winding 211 is also improved, and the performance of the product is improved. Further, since each winding 211 is wound around the second stator tooth 130, and the first stator tooth 120 and the second stator tooth 130 are spaced apart, that is, the first stator tooth 120 is disposed between any two adjacent windings 211, the windings 211 are separated by the first stator tooth 120, in this case, even if a problem occurs in one winding 211, the adjacent windings 211 will not be affected, and the reliability of the product is improved.

Further, in order to further increase the installation space of the winding 211, the present application defines the dimensions of the first stator teeth 120 and the second stator teeth 130. Specifically, the width of the first stator teeth 120 is less than the width of the second stator teeth 130. As can be appreciated, since the windings 211 are wound around the second stator teeth 130 and the windings 211 are not wound around the first stator teeth 120, i.e., the second stator teeth 130 and the adjacent first stator teeth 120 define stator slots 221 for accommodating the windings 211, the smaller the width of the first stator teeth 120, the larger the space of the stator slots 221, the larger the installation space of the windings 211, and the less difficult the windings 211 are wound. Therefore, in order to further reduce the winding difficulty of the winding 211, the width of the first stator teeth 120 is set smaller than the width of the second stator teeth 130, so that the size of the stator slot 221 can be increased, the installation space of the winding 211 is further increased, and the winding difficulty of the winding 211 is further reduced. Also, since the winding 211 is not wound on the first stator teeth 120, the stress of the first stator teeth 120 is smaller than that of the second stator teeth 130, and even if the width of the first stator teeth 120 is smaller than that of the second stator teeth 130, there is no risk that the first stator teeth 120 break due to insufficient strength.

Further, in designing the width of the first stator teeth 120 and the width of the second stator teeth 130, it is necessary to consider the relationship between the angle of the pole arc occupied by the first stator teeth 120 and the angle of the pole arc occupied by the second stator teeth 130. Specifically, the number of the first stator teeth 120 is Z, and the number of the first stator teeth 120 is As same As the number of the second stator teeth 130, and any one of the first stator teeth 120 and the adjacent second stator teeth 130 form a stator tooth part, wherein the tooth arc angle occupied by each stator tooth part is As, and the tooth arc angle occupied by each stator tooth part is formed by the pole arc angle occupied by the first stator tooth 120 and the pole arc angle occupied by the second stator tooth 130. Wherein the second stator teeth 130 occupy a pole arc angle of 2×a1, the first stator teeth 120 occupy a pole arc angle of 2×a2, as=360 °/z=2 (a1+a2). The distribution of the pole arc angle occupied by the first stator tooth 120 and the pole arc angle occupied by the second stator tooth 130 is closely related to the torque output capability of the motor 200, while the magnitude of the pole arc angle occupied by the first stator tooth 120 and the pole arc angle occupied by the second stator tooth 130 is related to the widths of the first stator tooth 120 and the second stator tooth 130. Accordingly, the appropriate distribution relationship of A1 and A2 may be selected to promote torque density of the electric machine 200, thereby designing the appropriate widths of the first stator teeth 120 and the second stator teeth 130 based on A1 and A2.

Further, defining the structure of the first stator teeth 120, any one of the first stator teeth 120 includes a first tooth body 121, the first tooth body 121 is connected to the stator yoke 110, and the width of the first tooth body 121 gradually increases in a direction away from the stator yoke 110. The first tooth body 121 is constructed in a trapezoid-like structure, and both sides of the first stator tooth 120 may or may not be provided with a convex structure. The width of the first stator teeth 120 changes in the radial direction of the stator core shim 100, and in particular, the width of the first tooth body 121 gradually increases in a direction away from the stator yoke 110. As shown in fig. 2, the width of the top of the first tooth 121 is H21, and the width of the root of the first tooth 121 is H22, where H21 > H22. As can be appreciated, if the widths of the respective positions of the first tooth 121 along the radial direction of the stator core segment 100 are the same, the widths of the stator slots 221 are smaller as they are closer to the central region of the stator core segment 100, which results in an increase in the winding difficulty of the windings 211. In order to further increase the distance between the first stator teeth 120 and the second stator teeth 130 and increase the space of the stator slot 221, the first tooth body 121 is configured to gradually increase the width along the direction away from the stator yoke 110, that is, the width of the first tooth body 121 is smaller the closer to the central region of the stator core punching sheet 100 is, so that the space of the stator slot 221 in the central region of the stator core punching sheet 100 is increased, the winding difficulty of the winding 211 is further reduced, the assembly efficiency of the product is improved, the assembly precision of the winding 211 is also improved, and the product performance is improved to some extent.

Also, by configuring the first tooth body 121 to have a structure in which one end is narrow and one end is wide, a narrower winding portion in the stator slot 221 can be improved to some extent, so that the winding arrangement of the winding 211 is more uniform from the radially inner side to the radially outer side.

Through set up the first stator tooth 120 and the second stator tooth 130 that the width is different in stator core towards piece 100 to twine the winding 211 in the motor 200 on the second stator tooth 130 that the width is wider, thereby can increase the size of the stator groove 221 between first stator tooth 120 and the second stator tooth 130 through setting up the less first stator tooth 120 of width, increase the installation space of winding 211, and then reduce the winding degree of difficulty of winding 211, promote the assembly efficiency of product, promoted the groove full rate of motor 200, still promoted the assembly precision of winding 211, make the product performance promote to some extent. In addition, since the windings 211 are all wound around the second stator teeth 130, two adjacent windings 211 can be separated by the first stator teeth 120, and even if one winding 211 is in a problem, the adjacent other windings 211 are not affected, so that the reliability of the product is improved. Through constructing the first tooth body 121 of the first stator tooth 120 as the structure that the width gradually increases along the direction deviating from the stator yoke 110, thereby the space of the stator slot 221 can be increased, and then the installation space of the winding 211 is increased, the winding difficulty of the winding 211 is reduced, the assembly efficiency of the product is improved, the winding arrangement of the winding 211 is more uniform from the radial inner side to the radial outer side, the assembly precision of the winding 211 is improved, and the product performance is improved to some extent.

In one embodiment according to the present application, as shown in fig. 1, any of the first stator teeth 120 further comprises: the first tooth crown 122 is connected with one end of the first tooth body 121 facing away from the stator yoke 110, and the first tooth crown 122 protrudes from two sides of the first tooth body 121.

In this embodiment, another structure of the first stator teeth 120 is defined. The first stator teeth 120 may be constructed in a structure including only the first tooth body 121, and the first stator teeth 120 may be also constructed in a structure including the first tooth body 121 and the first crown 122 connected to the first tooth body 121. In the case that the first stator tooth 120 includes the first crown 122, the first crown 122 is connected to an end of the first tooth body 121 facing away from the stator yoke 110. Specifically, the width of the first crown 122 is greater than that of the first tooth body 121, and the first crown 122 protrudes from both sides of the first tooth body 121. As can be appreciated, the first stator tooth 120 and the adjacent second stator tooth 130 form a stator slot 221, and since the first crown 122 is connected to the end of the first tooth body 121 away from the stator yoke 110, the first crown 122 is located at the notch of the stator slot 221. The stator groove 221 is used for accommodating the winding 211, and since the first tooth crown 122 protrudes from two sides of the first tooth body 121, the winding 211 can be limited by the protruding first tooth crown 122, so that the winding 211 is prevented from being separated from the stator groove 221, and the safety and reliability of the product are improved.

By arranging the first tooth crown 122 protruding from the first tooth body 121 in the first stator tooth 120, the winding 211 arranged in the stator groove 221 can be limited through the first tooth crown 122, the winding 211 is prevented from being separated from the stator groove 221, and the safety and reliability of a product are improved.

In one embodiment according to the present application, as shown in fig. 1, any one of the second stator teeth 130 includes: the second tooth 131, the second tooth 131 is connected with the stator yoke 110; the second tooth crown 132 is connected with one end of the second tooth body 131 facing away from the stator yoke 110, the second tooth crown 132 protrudes from two sides of the second tooth body 131, and at least one adjusting groove 133 is arranged at the edge of one side of the second tooth crown 132 facing away from the second tooth body 131.

In this embodiment, the structure of the second stator teeth 130 is defined. Any one of the second stators 210 includes a second tooth 131 and a second crown 132, wherein the second tooth 131 is connected to the stator yoke 110, the second tooth 131 extends in a radial direction away from the stator yoke 110, and the second crown 132 is connected to an end of the second tooth 131 away from the stator yoke 110. Specifically, if the winding 211 is wound around the second tooth 131 and the second stator tooth 130 is not provided with a structure protruding from the second tooth 131, the winding 211 is easily separated from the second tooth 131. In order to avoid the above problem, the second crown 132 is further disposed in the second stator tooth 130, and the second crown 132 is connected to one end of the second tooth 131 away from the stator yoke 110 and protrudes from two sides of the second tooth 131, so that the winding 211 can be limited by the second crown 132, and the winding 211 is prevented from falling off from the second tooth 131, so as to improve the safety and reliability of the product.

Further, at least one adjusting groove 133 is provided at an edge of a side of the second crown 132 facing away from the second tooth body 131, wherein the adjusting groove 133 is recessed from the edge of the second crown 132. The number of the second adjusting grooves 133 may be one or plural, and in the case where the number of the second adjusting grooves 133 is plural, the plurality of second adjusting grooves 133 are provided in order along the edge of the side of the second crown 132 facing away from the stator yoke 110. The second adjusting groove 133 is used for adjusting the torque pulsation of the motor 200, and the torque pulsation of the motor 200 can be reduced by arranging the second adjusting groove 133, so that the running stability of the motor 200 is improved.

In one embodiment according to the present application, as shown in fig. 1, in the case where the adjustment groove 133 in any one of the second crowns 132 is one, the center line of the adjustment groove 133 coincides with the center line of the second crown 132.

In this embodiment, the setting position of the adjustment groove 133 is defined. Specifically, in the case where the adjustment groove 133 in any one of the second crowns 132 is one, the center line of the adjustment groove 133 coincides with the center line of the second crown 132. Compared to a structure in which the adjustment grooves 133 are provided near both sides of the second crown 132, by providing the adjustment grooves 133 at the center position of the second crown 132 such that the center line of the adjustment grooves 133 coincides with the center line of the second crown 132, the adjustment effect of the adjustment grooves 133 on the torque pulsation of the motor 200 can be further improved, the torque pulsation of the motor 200 can be further reduced, and the stability of the operation of the motor 200 can be improved.

As shown in fig. 1, in one possible embodiment, a notch of the stator slot 221 is formed between the first crown 122 disposed on the first stator tooth 120 and the second crown 132 disposed on the second stator tooth 130, and the notch width of the stator slot 221 is composed of the notch width occupied by the first stator tooth 120 and the notch width occupied by the second stator tooth 130, where the notch width of the stator slot 221 is Ds, the notch width occupied by the second stator tooth 130 is D1, and the notch width occupied by the first stator tooth 120 is D2, ds=d1+d2.

In one embodiment according to the present application, as shown in fig. 2, the width of the second tooth body 131 gradually increases in a direction away from the stator yoke 110.

In this embodiment, the structure of the second tooth body 131 is defined. The second tooth 131 is constructed in a trapezoid-like structure, and the width of the second tooth 131 is changed in the radial direction of the stator core segment 100. Specifically, the width of the second tooth body 131 gradually increases in a direction away from the stator yoke 110, and as shown in fig. 2, the width of the top of the second tooth body is H11, and the width of the root of the second tooth body is H12, H11 > H12. As can be appreciated, if the widths of the respective positions of the second tooth 131 along the radial direction of the stator core segment 100 are the same, the widths of the stator slots 221 are smaller as they are closer to the central region of the stator core segment 100, which results in an increase in the winding difficulty of the windings 211. In order to further increase the distance between the first stator teeth 120 and the second stator teeth 130 and increase the space of the stator slot 221, the present application configures the second tooth body 131 to gradually increase in width in a direction away from the stator yoke 110, that is, the closer to the region of the center of the stator core segment 100, the smaller the width of the second tooth body 131. In this way, the space of the stator slot 221 in the central region of the stator core lamination 100 can be increased, so that the winding difficulty of the winding 211 is reduced, the assembly efficiency of the product is improved, the assembly precision of the winding 211 is also improved, and the product performance is improved to some extent.

Through constructing the second tooth body 131 as the structure that gradually increases along the direction width that deviates from stator yoke 110 to the space of multiplicable stator groove 221, and then increased the installation space of winding 211, reduced the winding degree of difficulty of winding 211, promoted the assembly efficiency of product, still promoted the assembly precision of winding 211, made the product performance promote to some extent.

In one embodiment according to the present application, as shown in fig. 1, the rotor 220 rotates from a first end of the second crown 132 to a second end of the second crown 132, any of the second crowns 132 comprising: a first sub-crown 134 located at a first end of the second crown 132, the first sub-crown 134 having a first arcuate outer edge 136; a second sub-crown 135 located at a second end of the second crown 132, the second sub-crown 135 having a second arcuate outer edge 137, the first arcuate outer edge 136 having a radius of curvature that is less than the radius of curvature of the second arcuate outer edge 137.

In this embodiment, the structure of the second crown 132 is further defined. The motor 200 for the stator core lamination 100 further includes a rotor 220, where the rotor 220 of the motor 200 is disposed coaxially with the stator core lamination 100 and is capable of rotating relative to the stator core lamination 100, specifically, the rotor 220 rotates from the first end of the second crown 132 to the second end of the second crown 132. Any one of the second crowns 132 includes a first sub-crown 134 and a second sub-crown 135, the first sub-crown 134 and the second sub-crown 135 being located at two ends of the second crown 132, respectively, wherein the first sub-crown 134 is located at a first end of the second crown 132 and the second sub-crown 135 is located at a second end of the second crown 132. The sides of the first and second sub-crowns 134 and 135 facing away from the stator yoke 110 are each configured in an arc shape, the first sub-crown 134 having a first arc-shaped outer edge 136, the second sub-crown 135 having a second arc-shaped outer edge 137, the first arc-shaped outer edge 136 and the second arc-shaped outer edge 137 being located on the side of the second crown 132 facing away from the stator yoke 110, the first arc-shaped outer edge 136 extending from the notch of the adjustment slot 133 to the end of the first sub-crown 134, and the second arc-shaped outer edge 137 extending from the notch of the adjustment slot 133 to the end of the second sub-crown 135. In order to further reduce torque pulsation of the motor 200, the present application correspondingly defines the curvature radius of the first arc-shaped outer edge 136 and the second arc-shaped outer edge 137, specifically, the curvature radius of the first arc-shaped outer edge 136 is smaller than that of the second arc-shaped outer edge 137, which is beneficial to reducing torque pulsation of the motor 200 and further improving running stability of the motor 200.

In one embodiment according to the present application, as shown in fig. 1, any one of the first crowns 122 includes: a third sub-crown 123 located at a first end of the first crown 122, the third sub-crown 123 having a third arcuate outer edge 125; a fourth sub-crown 124 at the second end of the first crown 122, the fourth sub-crown 124 having a fourth arcuate outer edge 126, the third arcuate outer edge 125 having a radius of curvature and/or the fourth arcuate outer edge 126 having a radius of curvature less than the radius of curvature of the arcuate outer edge of the stator core assembly.

In this embodiment, the structure of the first crown 122 is further defined. Any one of the first crowns 122 includes a third sub-crown 123 and a fourth sub-crown 124, and the third sub-crown 123 and the fourth sub-crown 124 are located at both ends of the first crown 122, respectively. The third sub-crown 123 has a third arcuate outer edge 125 and the fourth sub-crown 124 has a fourth arcuate outer edge 126, with both the third arcuate outer edge 125 and the fourth arcuate outer edge 126 being located on a side of the first crown 122 facing away from the stator yoke 110. In order to further reduce torque ripple of the motor 200, the present application correspondingly defines the curvature radius of the third arc-shaped outer edge 125 and the fourth arc-shaped outer edge 126, specifically, the curvature radius of the third arc-shaped outer edge 125 and/or the curvature radius of the fourth arc-shaped outer edge 126 are smaller than the curvature radius of the arc-shaped outer edge of the stator core assembly, which is beneficial to reducing torque ripple of the motor 200 and further improving running stability of the motor 200.

In the above solution, further, the rotor 220 includes: a rotor yoke 222; the plurality of rotor magnets 223, the plurality of rotor magnets 223 are connected to the rotor yoke 222 in order in the circumferential direction, a space is provided between any two adjacent rotor magnets 223, and the rotor magnets 223 are provided on the side of the rotor yoke 222 facing the stator 210.

In this embodiment, the structure of the rotor 220 is defined. The rotor 220 includes a rotor yoke 222 and a plurality of rotor magnets 223, and the plurality of rotor magnets 223 are sequentially connected to the rotor yoke 222 in the circumferential direction. Specifically, the plurality of rotor magnets 223 are uniformly distributed inside the rotor yoke 222 in the circumferential direction of the rotor 220.

In one possible embodiment, the rotor magnet 223 is configured as a multi-pole magnetic ring that is formed as a ring-like structure from permanent magnet material that fits into the rotor yoke 222 to form a nested structure. The integrated magnetic ring is beneficial to simplifying assembly procedures and improving manufacturing efficiency. Specifically, the multipolar magnetic ring is a rubber magnetic strip, and is assembled with the rotor yoke 222 by bending and rolling.

Further, a space is provided between any two adjacent rotor magnets 223, and torque pulsation can be optimized by providing a reasonable space between a plurality of rotor magnets 223.

In one possible embodiment, a plurality of rotor magnets 223 are integrally overmolded with the rotor yoke 222, thereby enabling a reduction in motor performance degradation due to process error accumulation.

In one embodiment according to the present application, as shown in fig. 4, both ends of either rotor magnet 223 have a first arc-shaped inner edge 224, and the radius of curvature of the first arc-shaped inner edge 224 is larger than that of the arc-shaped inner edge of the rotor 220.

In this embodiment, the structure of the rotor magnet 223 is further defined. The two ends of either rotor magnet 223 have first arc-shaped inner edges 224, and the first arc-shaped inner edges 224 are disposed on the side facing the stator 210. In order to further reduce torque ripple of the motor 200, the present application correspondingly defines a radius of curvature of the first arc inner edge 224, specifically, the radius of curvature of the first arc inner edge 224 is greater than the radius of curvature of the arc inner edge of the rotor 220, which is beneficial to reducing torque ripple of the motor 200 and further improving operational stability of the motor 200.

In one possible embodiment, the first arcuate inner edge 224 is configured as a skived arc structure, which may be a circular arc or a right angle cut, and may be symmetrical or asymmetrical. The second aspect of the present utility model also proposes an electrical device comprising the motor 200 according to the first aspect of the present utility model.

The electrical apparatus provided in the second aspect of the present utility model includes the motor 200 provided in the first aspect of the present utility model, and thus has all the advantages of the motor 200.

In the present utility model, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean 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 present utility model. In this specification, schematic representations of the above terms 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 of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An electric machine, comprising:

a rotor including a stator slot;

stator is located in the stator groove, the stator includes stator core, stator core includes a plurality of stator core towards piece that stacks up and sets up, arbitrary stator core towards piece includes:

a stator yoke;

a plurality of first stator teeth connected to an outer peripheral side of the stator yoke in a circumferential direction;

a plurality of second stator teeth connected to an outer peripheral side of the stator yoke in a circumferential direction, the plurality of first stator teeth being disposed between the plurality of second stator teeth, a width of the first stator teeth being smaller than a width of the second stator teeth;

the stator further comprises a plurality of windings, any one of which is wound around a corresponding one of the second stator teeth; any of the first stator teeth includes:

The first tooth body is connected with the stator yoke part, and the width of the first tooth body is gradually increased along the direction deviating from the stator yoke part.

2. The electric machine of claim 1, wherein any of the first stator teeth further comprises:

and the first tooth crown is connected with one end of the first tooth body, which is away from the stator yoke part, and protrudes from two sides of the first tooth body.

3. An electric machine according to claim 1 or 2, wherein any one of the second stator teeth comprises:

the second tooth body is connected with the stator yoke part;

the second tooth crown is connected with one end of the second tooth body, which is away from the stator yoke part, the second tooth crown protrudes from two sides of the second tooth body, and at least one adjusting groove is formed in the edge of one side of the second tooth crown, which is away from the second tooth body.

4. The motor of claim 3, wherein the motor is configured to control the motor,

in the case where the adjusting groove in any one of the second crowns is one, the center line of the adjusting groove coincides with the center line of the second crown.

5. The motor of claim 3, wherein the motor is configured to control the motor,

the width of the second tooth body gradually increases in a direction away from the stator yoke.

6. A motor as claimed in claim 3, wherein the rotor rotates from a first end of the second crown to a second end of the second crown, any of the second crowns comprising:

a first sub-crown located at a first end of the second crown, the first sub-crown having a first arcuate outer edge;

the second sub-crown is positioned at the second end of the second crown, the first arc-shaped outer edge of the second sub-crown is provided with a second arc-shaped outer edge, and the curvature radius of the first arc-shaped outer edge is smaller than that of the second arc-shaped outer edge.

7. The electric machine of claim 2, wherein any of the first crowns comprises:

a third sub-crown located at a first end of the first crown, the third sub-crown having a third arcuate outer edge;

and the fourth sub-crown is positioned at the second end of the first crown and is provided with a fourth arc-shaped outer edge, and the curvature radius of the third arc-shaped outer edge and/or the curvature radius of the fourth arc-shaped outer edge is smaller than that of the arc-shaped outer edge of the stator core punching sheet.

8. The electric machine of claim 1, wherein the rotor comprises:

A rotor yoke;

the rotor magnets are sequentially connected with the rotor yoke along the circumferential direction, a space is reserved between any two adjacent rotor magnets, and the rotor magnets are arranged on one side of the rotor yoke, which faces the stator.

9. The motor of claim 8, wherein the motor is configured to control the motor,

the two ends of any rotor magnet are provided with first arc inner edges, and the curvature radius of the first arc inner edges is larger than that of the arc inner edges of the rotor.

10. An electrical device, comprising:

an electrical machine as claimed in any one of claims 1 to 9.