CN218301025U - Stator and motor with same - Google Patents

Abstract

The utility model relates to a stator and motor that has it, the stator includes stator core, stator core includes a plurality of iron core units of joint in proper order along the circumferencial direction, relative both sides on one of arbitrary two adjacent iron core units are equipped with first spacing portion respectively, relative both sides on another are equipped with the spacing portion of second respectively, adjacent first spacing portion and the spacing portion joint of second, wherein, along the axial direction of iron core unit, the height that highly is less than the iron core unit of first spacing portion, the height that highly is less than the iron core unit of the spacing portion of second. According to the utility model discloses a stator, through the joint cooperation of first spacing portion and the spacing portion of second, can reduce the clearance between the adjacent iron core unit, can avoid simultaneously being difficult to the assembly because of perpendicular tolerance accumulation, simultaneously, each in the three-phase winding splices after making on the iron core unit that corresponds again and constitutes stator core for same looks winding can adopt the mode of direct line of crossing.

Description

Stator and motor with same

Technical Field

The application relates to the technical field of motors, in particular to a stator and a motor with the same.

Background

The existing winding method of the motor has two types, one is a star connection method, and the other is a triangle connection method. For delta connection, the winding mode of the existing inner rotor motor is as follows: winding is carried out on one tooth pole of the stator, then a wire body extends out from one end of the motor and is wound on other tooth poles, and a part extending out of the motor and connecting two coils is called a 'bridge wire'. The wire passing mode is complex in process, when the coil forms a parallel circuit and the parallel branch is more than or equal to 2, the complexity of the wire passing is increased, the problem of insufficient soldering easily occurs in the welding of the coil and the wiring terminal, so that the resistance of a welding point is increased, and the electrical performance of the motor is influenced. Meanwhile, the traditional split motor gap bridge wire is designed in a piercing terminal connection mode, the long-term wiring is complex after the structure is pierced, the piercing terminal cost is high, and the production automation degree is low; and splicing the block position and continuing secondary welding, so as to ensure that the iron core is finally rounded, and the welding causes the iron loss of the motor to be increased, and the efficiency of the motor is deteriorated.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a stator, the stator can reduce the clearance of stator core concatenation and reduce the assembly degree of difficulty.

According to the utility model discloses a stator, including stator core, stator core includes along a plurality of iron core units of circumferencial direction joint in proper order, and the relative both sides of iron core unit are equipped with first spacing portion and the spacing portion of second respectively, arbitrary adjacent two the iron core unit is through the spacing portion joint of first spacing portion and second, wherein, along the axial direction of iron core unit, the height that highly is less than the iron core unit of first spacing portion, the height that highly is less than the iron core unit of the spacing portion of second.

According to the utility model discloses a stator, through the joint cooperation of first spacing portion and the spacing portion of second, can reduce the clearance between the adjacent iron core unit, can avoid simultaneously being difficult to the assembly because of tolerance accumulation such as perpendicular, simultaneously, each in the three-phase winding splices after making on the iron core unit that corresponds again and constitutes stator core for same looks winding can adopt the mode of direct line of crossing, need not to use and punctures terminal structure, also need not welding process rounding simultaneously.

According to the utility model discloses a stator, first spacing portion constructs into the recess that extends along the axial direction of iron core unit, and the guide strip that the axial direction of iron core unit extends is constructed into to the spacing portion of second, and the one end of recess extends to the border department of iron core unit and prescribes a limit to and opens the mouth, and the one end of guide strip extends to the border department of iron core unit.

Optionally, along the axial direction of the iron core unit, the height of the guide bar is H, the height of the iron core unit is H, and H satisfy: h ≧ 1/8H.

Optionally, the guide bar comprises a protruding portion and a concave returning portion, the protruding portion is connected with the iron core unit through the concave returning portion, along a direction perpendicular to a symmetry axis of the guide bar, a maximum width of the protruding portion is L1, a minimum width of the concave returning portion is L2, and L1 and L2 satisfy: l1 > L2.

According to the utility model discloses a stator, stator core includes along the relative first end of axial direction and second end, the last three insulating skeleton group that is equipped with of stator core, insulating skeleton group is including the sub-skeleton that is located first end and second end respectively, be fixed with first phase winding on every insulating skeleton group respectively, one among second phase winding and the third phase winding, insulating skeleton group is including crossing the line step, it locates first end or second end to cross the line step, it is used for fixed line segment to cross the line step, the height that lies in the line step of crossing of same end of different insulating skeleton groups is all inequality.

Optionally, the wire passing segments of the first phase winding and the second phase winding are both located at the first end, and the wire passing segment of the third phase winding is located at the second end.

Optionally, the wire inlet end and the wire outlet end of the first phase winding, the second phase winding and the third phase winding are all located at the first end.

Optionally, the incoming line ends of the first phase winding, the second phase winding and the third phase winding are located at the first end, the outgoing line ends of the first phase winding, the second phase winding and the third phase winding are located at the second end, the insulating skeleton group includes a pair of sub-skeletons, each pair of sub-skeletons corresponds to the iron core unit one to one, the pair of sub-skeletons includes sub-skeletons respectively located at the first end and the second end, the number of turns of a wire in one of the plurality of pairs of sub-skeletons corresponding to the third phase winding is N, the number of turns of a wire in the other groups is N, the number of turns of a wire in any one of the plurality of pairs of sub-skeletons corresponding to the first phase winding or the second phase winding is N, where N and N satisfy: N-N =1.

According to the utility model discloses a stator, a plurality of iron core units divide into at least three iron core group, and at least three iron core group connects gradually, and every iron core group includes three iron core unit, and three iron core unit respectively with first phase winding, second phase winding and third phase winding one-to-one.

According to the utility model discloses a motor, including foretell stator.

According to the utility model discloses a motor, through setting up foretell stator, the higher stability of work efficiency of motor is better.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a perspective view of any two adjacent core units of a stator according to an embodiment of the present invention;

fig. 2 is a top view of a core unit of a stator according to an embodiment of the present invention;

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

fig. 4 is an expanded schematic view of the splicing step of the core units corresponding to the first phase winding and the second phase winding of the stator respectively according to the embodiment of the present invention;

fig. 5 is an expanded schematic diagram of a splicing step of iron core units corresponding to a third phase winding and a second phase winding of a stator respectively according to an embodiment of the present invention;

fig. 6 is an expanded schematic view of a stator according to an embodiment of the present invention.

Reference numerals:

the stator comprises a stator 1, a stator core 10, a core unit 11, an outer yoke 110, a tooth part 111, a first limiting part 112, a groove 113, a second limiting part 114, a guide bar 115, a sub-framework 20, a wire passing step 21, a first wire passing section 32, a second wire passing section 34 and a third wire passing section 36.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1-3, according to the utility model discloses stator 1 of embodiment, including stator core 10, stator core 10 includes a plurality of iron core units 11 of joint in proper order along the circumferencial direction, the relative both sides of iron core unit 11 are equipped with first spacing portion 112 and the spacing portion 114 of second respectively, arbitrary two adjacent iron core units 11 are through the spacing portion 112 of first spacing portion 112 and the spacing portion 114 joint of second, namely adjacent first spacing portion 112 and the spacing portion 114 joint of second, wherein, along the axial direction of iron core unit 11, the height of first spacing portion 112 is less than the height of iron core unit 11, the height of the spacing portion 114 of second is less than the height of iron core unit 11.

For unfolding, the iron core units 11 include a first side and a second side opposite to each other along the circumferential direction, the plurality of iron core units 11 are sequentially connected end to form a circular ring, the first limiting portion 112 of one iron core unit 11 is connected with the second limiting portion 114 of another adjacent iron core unit 11 on one side in a clamping manner, and the second limiting portion 114 of the iron core unit 11 is connected with the first limiting portion 112 of the adjacent iron core unit 11 on the other side in a clamping manner.

The height of the first limiting part 112 is smaller than that of the core unit 11, and the height of the second limiting part 114 is smaller than that of the core unit 11, so that the length of the clamping assembly of two adjacent core units 11 is smaller than that of the core unit 11, and the problem of difficulty in assembly due to vertical equal tolerance accumulation can be reduced.

In addition, stator core 10's effect is fixed three-phase winding, and three-phase winding's effect is to produce rotating magnetic field, and stator core 10 includes and holds along axial direction relative first end and second, is equipped with three insulating skeleton group on stator core 10, and insulating skeleton group is including a plurality of sub-skeleton pairs, every sub-skeleton pair with iron core unit 11 one-to-one, sub-skeleton pair is including the sub-skeleton 20 that is located first end and second end respectively. One insulating framework group is used for fixing a first-phase winding, one insulating framework group is used for fixing a second-phase winding, the other insulating framework group is used for fixing a third-phase winding, and each phase winding comprises a winding section wound along the circumferential direction of each iron core unit 11 and the corresponding sub-framework 20 and a wire passing section connected between different iron core units 11 in the same phase.

As shown in fig. 4 to 6, when three-phase wires are wound, the wires of a first phase are wound around the corresponding iron core units 11 to form first-phase windings, the wires of a second phase are wound around the corresponding iron core units 11 to form second-phase windings, the wires of a third phase are wound around the corresponding iron core units 11 to form third-phase windings, and a plurality of iron core units 11 corresponding to each phase of windings are sequentially wound in series, and then as shown in fig. 4, the iron core units 11 corresponding to the first-phase windings and the iron core units 11 corresponding to the second phase are spliced together, as shown in fig. 5, and then the iron core units 11 corresponding to the third phase are spliced together, so as to form a cylindrical stator iron core 10, as shown in fig. 6, which is an expanded schematic diagram after the splicing of the stator 1 is completed.

It should be noted that the first phase winding, the second phase winding and the third phase winding correspond to one of U-phase, V-phase and W-phase, respectively, for example, the first phase winding is a U-phase winding, the second phase winding is a V-phase winding, and the third phase winding is a W-phase winding; for another example, the first phase winding is a U-phase winding, the second phase winding is a W-phase winding, the third phase winding is a V-phase winding, and so on, which are not exhaustive in this application.

According to the utility model discloses stator 1, through the joint cooperation of first spacing portion 112 and the spacing portion 114 of second, can reduce the clearance between the adjacent iron core unit 11, can avoid simultaneously being difficult to the assembly because of tolerance accumulation such as perpendicular, and simultaneously, each in the three-phase winding splices the constitution stator core 10 after making in the winding on the iron core unit 11 that corresponds again mutually for same looks winding can adopt the mode of direct line of crossing, need not to use and punctures terminal structure, also need not welding process rounding simultaneously.

As shown in fig. 1 and 2, in some embodiments, the core unit 11 includes an outer yoke portion 110 and a tooth portion 111 extending inward in a radial direction of the outer yoke portion 110, a first position-limiting portion 112 is provided on a first side of the outer yoke portion 110 of the core unit 11, a second position-limiting portion 114 is provided on a second side of the outer yoke portion 110 of the core unit 11, a position of the first side of the outer yoke portion 110, which is away from the first position-limiting portion 112, is configured to be planar, and a position of the second side of the outer yoke portion 110, which is away from the second position-limiting portion 114, is configured to be planar, so that, except for a position of clamping, the rest of adjacent core units 11 are in surface contact, which can further reduce a gap between adjacent core units 11.

The first position-limiting portion 112 and the core unit 11 are integrally formed, and the second position-limiting portion 114 and the core unit 11 are integrally formed. Because each iron core unit 11 is formed by stacking a plurality of stator 1 punching sheets, here, "stacking" is to stack a plurality of stator 1 punching sheets together in sequence and connect adjacent stator 1 punching sheets. That is to say, the first position-limiting portion 112 or the second position-limiting portion 114 is formed by stacking at least one type of stator 1 laminations in sequence.

As shown in fig. 1 and fig. 2, according to the stator 1 of the embodiment of the present invention, the first limiting portion 112 is configured as a groove 113 extending along the axial direction of the core unit 11, the second limiting portion 114 is configured as a guide bar 115 extending along the axial direction of the core unit 11, one end of the groove 113 extends to the edge of the core unit 11 and defines an open mouth, one end of the guide bar 115 extends to the edge of the core unit 11, so as to simplify the structures of the first limiting portion 112 and the second limiting portion 114, and facilitate the guide bar 115 to be completely clamped into the groove 113 along the open mouth along the axial direction of the core unit 11, thereby facilitating the final splicing of the plurality of core units 11 into a cylindrical shape.

As shown in fig. 1, in some embodiments, the height of the guide bar 115 is H and the height of the core unit 11 is H in the axial direction of the core unit 11, and H satisfy: h ≧ 1/8H, so can ensure the joint intensity of adjacent iron core unit 11.

As shown in fig. 2, in some embodiments, the guide bar 115 includes a protruding portion and a concave returning portion, the protruding portion is connected with the core unit 11 through the concave returning portion, and along a direction perpendicular to the symmetry axis of the guide bar 115, the maximum width of the protruding portion is L1, the minimum width of the concave returning portion is L2, and L1 and L2 satisfy: l1 > L2. This is provided to prevent the guide bar 115 from coming out of the groove 113 in the circumferential direction.

According to the utility model discloses stator 1 is equipped with three insulating skeleton group on the stator core 10, is fixed with one among first phase winding, second phase winding and the third phase winding on every insulating skeleton group respectively, and insulating skeleton group is including crossing line step 21, crosses line step 21 and locates first end or second end, crosses line step 21 and is used for fixed line segment, and the height that lies in same end of different insulating skeleton groups crosses line step 21 is all inequality.

That is to say, one insulating skeleton group is used for fixing a first phase winding, one insulating skeleton group is used for fixing a second phase winding, and the other insulating skeleton group is used for fixing a third phase winding, each phase winding comprises a winding section wound along the circumferential direction of each iron core unit 11 and the corresponding sub-skeleton 20 and a wire passing section connected between different iron core units 11 in the same phase, each insulating skeleton group at least comprises three sub-skeleton pairs, that is to say, the stator core 10 is formed by splicing at least nine iron core units 11, each phase winding comprises at least three wire passing sections, each insulating skeleton group comprises at least three wire passing steps 21, the heights of the same group of wire passing steps 21 in the axial direction are the same, the heights of the wire passing steps 21 at the same end of different insulating skeleton groups are different, that is to say, the heights of the wire passing sections corresponding to different phase windings in the axial direction are different when the same end of the stator core 10. Therefore, the lead lines corresponding to the sub-frameworks are clear and do not interfere with each other, and the reasonability of the structure of the stator 1 and the safety in use are improved.

For example, a first group of winding steps 21 corresponding to a first phase winding is located at the first end, a second group of winding steps 21 corresponding to a second phase winding is located at the first end, a third group of winding steps 21 corresponding to a third phase winding is located at the first end, and then the heights of the three groups of winding steps 21 in the axial direction are different, then a corresponding winding section of the first phase winding is located at the first end, a winding section of the second phase winding is located at the first end, a winding section of the third phase winding is located at the first end, and the heights of the winding sections in the axial direction are different.

As shown in fig. 6, the first group of winding steps 21 corresponding to the first phase winding is located at the first end, the second group of winding steps 21 corresponding to the second phase winding is located at the first end, the third group of winding steps 21 corresponding to the third phase winding is located at the second end, and then the heights of the first group of winding steps 21 and the second group of winding steps 21 in the axial direction are different, so that the corresponding winding segment of the first phase winding is located at the first end, the winding segment of the second phase winding is located at the first end, the winding segment of the third phase winding is located at the second end, and the heights of the winding segments corresponding to the first phase winding and the second phase winding in the axial direction are different.

For convenience of indication, the line crossing segment of the first phase winding is defined as a first line crossing segment 32, the line crossing segment of the second phase winding is defined as a second line crossing segment 34, and the line crossing segment of the third phase winding is defined as a third line crossing segment 36, as shown in fig. 6, which shows an unfolding schematic diagram of the stator 1, it can be seen that the first line crossing segment 32 and the second line crossing segment 34 are both located at the first end, the third line crossing segment 36 is located at the second end, and the height of the first line crossing segment 32 is lower than that of the second line crossing segment 34, so as to prevent the first line crossing segment 32 and the second line crossing segment 34 from interfering.

In some embodiments, the wire passing segments of the first phase winding and the second phase winding are both located at the first end, and the wire passing segment of the third phase winding is located at the second end.

Because the windings between the iron core units 11 of each phase are connected through the wire passing sections, the windings can only be axially assembled in the assembling process, and the wire passing sections cannot exceed the outer diameter of the stator iron core 10, the wire passing sections of the first phase winding and the second phase winding are both arranged at the first end, and the wire passing sections of the third phase winding are arranged at the second end, as shown in fig. 4-6, so that the iron core units 11 are assembled in an up-and-down staggered mode in the axial assembling process, and the wire passing sections corresponding to different phase windings are prevented from interfering the insertion of the iron core units 11 of other phases.

In some embodiments, the incoming line end and the outgoing line end of the first phase winding, the second phase winding and the third phase winding are all located at the first end, so that the winding process can be simplified.

In some embodiments, the wire inlet ends of the first phase winding, the second phase winding and the third phase winding are located at the first end, the wire outlet ends of the first phase winding, the second phase winding and the third phase winding are located at the second end, the number of turns of the wire in one of the plurality of sub-skeleton pairs corresponding to the third phase winding is N, the number of turns of the wire in the other groups is N, and the number of turns of the wire in any one of the plurality of sub-skeleton pairs corresponding to the first phase winding or the second phase winding is N, where N and N satisfy: N-N =1. Thus, the flux linkage symmetry of each phase can be ensured.

According to the utility model discloses a stator 1, a plurality of iron core units 11 divide into at least three iron core group, and at least three iron core group connects gradually, and every iron core group includes three iron core unit 11, and three iron core unit 11 respectively with first phase winding, second phase winding and third phase winding one-to-one, so can simplify stator core 10's concatenation process.

For example, as shown in fig. 4 to 6, the stator 1 includes 9 core units 11, which are the 1 st, 2 nd, 3 rd, 4 th, 5 th, 6 th, 7 th, 8 th and 9 th core units 11 in this order, a first phase winding is wound in the order of 1 → 4 → 7, a second phase winding is wound in the order of 2 → 5 → 8, and a third phase winding is wound in the order of 3 → 6 → 9.

As another example, the stator 1 includes 12 core units 11, and the 1 st, 2 nd, 3 rd, 4 th, 5 th, 6 th, 7 th, 8 th, 9 th, 10 th, 11 th, and 12 th core units 11, 11 th phases are wound in the order of 1 → 4 → 7 → 10, the second phase is wound in the order of 2 → 5 → 8 → 11, and the third phase is wound in the order of 3 → 6 → 9 → 12, in this order, the 1 st, 2 nd, 3 rd, 4 th, 5 th, 6 th, 7 th, 8 th, 9 th core units 11, 11 th, and 12 th core units 11.

According to the utility model discloses the motor, including foretell stator 1.

According to the utility model discloses the motor still includes the rotor usually, and the rotor includes rotor core, rotor core's effect constitutes the whole magnetic circuit of motor jointly with stator core 10 and air gap, is fixed with rotor winding on the rotor core, rotor winding's effect is induced electromotive force, flows through the electric current and produces electromagnetic torque, and through setting up foretell stator 1, stator 1 adopts the mode of direct line of crossing, need not to use and punctures terminal structure, also need not welding process to become round simultaneously, has prevented the existence of rosin joint.

According to the utility model discloses the motor, through setting up foretell stator 1, the work efficiency of motor is higher, stability is better.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present 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.

Claims (10)

1. A stator is characterized by comprising a stator core, wherein the stator core comprises a plurality of core units which are sequentially clamped along the circumferential direction, a first limiting part and a second limiting part are respectively arranged at two opposite sides of each core unit, any two adjacent core units are clamped through the first limiting part and the second limiting part, wherein,

along the axial direction of iron core unit, the height of first spacing portion is less than the height of iron core unit, the height of the spacing portion of second is less than the height of iron core unit.

2. The stator according to claim 1, wherein the first stopper portion is configured as a groove extending in an axial direction of the core unit, the second stopper portion is configured as a guide bar extending in the axial direction of the core unit,

one end of the groove extends to the edge of the iron core unit and defines an open opening, and one end of the guide strip extends to the edge of the iron core unit.

3. The stator according to claim 2, wherein the height of the guide bar is H, the height of the core unit is H, and H satisfy: h ≧ 1/8H.

4. The stator according to claim 3, wherein the guide bar comprises a protruding portion and a concave returning portion, the protruding portion is connected with the core unit through the concave returning portion, the maximum width of the protruding portion is L1, the minimum width of the concave returning portion is L2, and L1 and L2 satisfy: l1 > L2.

5. The stator of claim 1, wherein the stator core includes a first end and a second end opposite to each other in an axial direction, three insulating frame groups are disposed on the stator core, each insulating frame group includes sub-frames respectively disposed at the first end and the second end, each insulating frame group is fixed with one of a first phase winding, a second phase winding and a third phase winding, each insulating frame group includes a wire passing step, the wire passing step is disposed at the first end or the second end, the wire passing step is used for fixing a wire passing segment, and heights of the wire passing steps at the same end of the insulating frame groups are different.

6. The stator of claim 5, wherein the over-segments of the first and second phase windings are both located at the first end and the over-segments of the third phase winding are located at the second end.

7. The stator of claim 6, wherein the incoming and outgoing ends of the first, second, and third phase windings are located at the first end.

8. The stator according to claim 7, wherein the wire inlet ends of the first phase winding, the second phase winding, and the third phase winding are located at the first end, the wire outlet ends of the first phase winding, the second phase winding, and the third phase winding are located at the second end,

insulating skeleton group is right including a plurality of skeletons, every the skeletons are right with iron core unit one-to-one, the skeletons are to including being located respectively first end with the second end the skeletons are corresponding to wire turns on one of them set of in a plurality of skeletons of third phase winding centering are N, and wire turns on the other sets is N, corresponding to wire turns on first phase winding or arbitrary a set of in a plurality of skeletons on the second phase winding centering are N, and wherein, N and N satisfy: N-N =1.

9. The stator according to claim 5, wherein the plurality of core units are divided into at least three core groups, the at least three core groups are sequentially connected, each core group comprises three core units, and the three core units are respectively in one-to-one correspondence with the first phase winding, the second phase winding and the third phase winding.

10. An electrical machine comprising a stator according to any of claims 1-9.

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