CN118713353A - Motor stator assembly - Google Patents

Abstract

The present application relates to the field of motor technology, and in particular to a motor stator assembly. The present application provides a motor stator assembly, including a motor stator, a first conductive ring, a plurality of first-phase coils, a plurality of second-phase coils, and a plurality of third-phase coils. The motor stator includes a yoke and a plurality of magnetic poles, and the plurality of magnetic poles are spaced along the circumference of the yoke. Each magnetic pole is arranged on the inner circumference of the yoke and extends radially inwardly of the yoke. Along the circumference of the yoke, a plurality of first-phase coils, a plurality of second-phase coils, and a plurality of third-phase coils are arranged alternately in sequence, and each first-phase coil, each second-phase coil, and each third-phase coil are sleeved on the corresponding magnetic pole. Along the axial direction of the motor stator, a first conductive ring is arranged on one side of the yoke, and a first lead-out terminal and a plurality of first lead-in terminals are provided on the first conductive ring, and each first lead-in terminal is connected to the input end of the corresponding first-phase coil. The motor stator is dimensionally stable and the risk of short circuit caused by damage to the insulation layer is reduced.

Description

Motor stator assembly

Technical Field

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

Background Art

When wiring the stator coils of traditional motors, the three phases UVW and the neutral line are wired according to the wiring schematic diagram. One end of a U-phase coil is welded to one end of another U-phase coil. After welding, the two welded and plastic-wrapped U-phase wires are insulated with a heat shrink tube, and then the two welded and plastic-wrapped U-phase wires are led out. The same is true for the V phase and W phase. The manual lead-out wire wiring will cause the solder joint height to be too high, resulting in an increase in the size of the motor stator assembly, which will interfere with the installation of the entire motor stator. And because the two coils of the same phase are far apart, the coil pulling is likely to damage the insulation layer during manual wiring, leading to the risk of short circuit.

Summary of the invention

The present application provides a motor stator assembly, which solves the technical problems of uncontrollable size of the motor stator assembly and easy damage of the coil insulation layer, thereby causing the risk of short circuit, thereby achieving stable size of the motor stator and reducing the risk of short circuit caused by damage to the insulation layer.

In order to achieve the above objectives, the main technical solutions adopted in this application include:

An embodiment of the present application provides a motor stator assembly, comprising a motor stator, a first conductive ring, a plurality of first-phase coils, a plurality of second-phase coils and a plurality of third-phase coils, the motor stator comprising a yoke and a plurality of magnetic poles, the plurality of magnetic poles being spaced apart along the circumferential direction of the yoke, each of the magnetic poles being arranged on the inner circumferential surface of the yoke and extending toward the radial inner side of the yoke; along the circumferential direction of the yoke, a plurality of the first-phase coils, a plurality of the second-phase coils and a plurality of the third-phase coils are alternately arranged in sequence, each of the first-phase coils, each of the second-phase coils and each of the third-phase coils are sleeved on the corresponding magnetic pole; along the axial direction of the motor stator, the first conductive ring is arranged on one side of the yoke, the first conductive ring is provided with a first lead-out terminal and a plurality of first lead-in terminals, each of the first lead-in terminals is connected to the input end of the corresponding first-phase coil.

The motor stator assembly proposed in the embodiment of the present application, the first conductive ring is provided with a plurality of first lead-in terminals, the number of the first lead-in terminals corresponds to the number of the first phase coils, and the input end of each first phase coil is welded to the corresponding first lead-in terminal. By setting the first conductive ring, the input end of each first phase line ring is connected to the first lead-in terminal corresponding to the first conductive ring, so that the connection size of the lead-out wire at the input end of the first phase coil can be controlled, and then the size of the entire motor stator assembly can be controlled. The current enters the first conductive ring from the first lead-out terminal, and then enters the corresponding first phase coil from the first lead-in terminal. The input end of the first phase coil connected to the first lead-in terminal and the lead-out wire connected to the first lead-out terminal are connected through the first conductive ring. The setting of the first conductive ring reduces the long-distance routing of the lead-out wire of the first phase coil, thereby reducing the damage of the insulation layer, and further reducing the risk of short circuit caused by contact between the lead-out wires of each phase coil.

Optionally, along the axial direction of the motor stator, the yoke has a first side surface; the motor stator assembly further includes a first rubber-coated portion, the first rubber-coated portion has a first insulating layer, and along the axial direction of the motor stator, the first insulating layer is arranged between the first side surface and the first conductive ring. The first insulating layer is arranged between the yoke and the first conductive ring to reduce the contact between the yoke and the first conductive ring, thereby reducing the influence of the yoke on the current of the first phase coil.

Optionally, a first limiting post is provided on the first insulating layer, and a first limiting hole matched with the first limiting post is provided on the first conductive ring. By providing the first limiting post on the first insulating layer, the first limiting hole of the first conductive ring matches with the first limiting post, so as to realize the positioning of the first conductive ring, prevent the first conductive ring from deviating along the radial direction of the motor stator assembly, and thus reduce the instability of the structure and performance of the motor stator assembly caused by the deviation of the first conductive ring.

Optionally, a second limiting post is provided on the first insulating layer, a second limiting hole cooperating with the second limiting post is provided on the first conductive ring, and the diameter of the first limiting post is different from the diameter of the second limiting post. The second limiting post is provided on the first insulating layer, and the second limiting hole cooperating with the second limiting post is provided on the first conductive ring. On the one hand, the first conductive ring can be limited to prevent the first conductive ring from being offset along the circumferential and radial directions of the motor stator; on the other hand, the diameter of the first limiting post is different from the diameter of the second limiting post, which can limit the first conductive ring along the circumferential and radial directions of the motor stator. At the same time, the first lead-in terminal of the first conductive ring and the input end of the first phase coil are correspondingly arranged, and the position of the first lead-out terminal can be located in a set area, which can reduce the long-distance routing of each first phase coil and the first lead-in terminal during the connection process, and the long-distance routing of the lead-out wire of the motor stator assembly led out from the first lead-out terminal, thereby reducing the risk of short circuit caused by damage to the insulation layer of the lead-out wire due to long-distance routing.

Optionally, the motor stator assembly further comprises a second conductive ring, which is arranged on a side of the first conductive ring away from the yoke along the axial direction of the motor stator, and the second conductive ring is provided with a second lead-out terminal and a plurality of second lead-in terminals, each of which is connected to the input end of the corresponding second phase coil; the motor stator assembly further comprises a third conductive ring, which is arranged on a side of the second conductive ring away from the yoke along the axial direction of the motor stator, and the third conductive ring is provided with a third lead-out terminal and a plurality of third lead-in terminals, each of which is connected to the input end of the corresponding third phase coil. The input end of the second phase coil is connected to the second lead-in terminal of the second conductive ring in correspondence, so that the connection size of the lead-out wire of the input end of the second phase coil is controllable; the input end of the third phase coil is connected to the third lead-in terminal of the third conductive ring in correspondence, so that the connection size of the lead-out wire of the input end of the third phase coil is controllable, thereby making the size of the entire motor stator assembly controllable. The current enters the second lead-out terminal from the lead-out wire and then enters the second conductive ring, and enters the second phase coil through the second lead-in terminal, thereby reducing the long-distance routing of the lead-out wire at the input end of the second phase coil; the current enters the third lead-out terminal from the lead-out wire and then enters the third conductive ring, and enters the third phase coil through the third lead-in terminal, thereby reducing the long-distance routing of the lead-out wire at the input end of the third phase coil, thereby reducing the damage to the insulation layer and further reducing the risk of short circuit of the coil.

Optionally, the second conductive ring and the third conductive ring are respectively provided with a third limiting hole and a fourth limiting hole that cooperate with the first limiting column. The second conductive ring is sleeved on the first limiting column through the third limiting hole to limit the second conductive ring along the axial direction of the motor stator, thereby preventing the second conductive ring from being offset along the axial direction of the motor stator; the third conductive ring is sleeved on the first limiting column through the fourth limiting hole to limit the third conductive ring along the axial direction of the motor stator, thereby preventing the third conductive ring from being offset along the axial direction of the motor stator.

Optionally, along the circumference of the motor stator, the first lead terminal, the second lead terminal and the third lead terminal are arranged adjacent to each other. The projections of the first lead terminal, the second lead terminal and the third lead terminal along the axial direction of the motor stator are close, so that the lead-out terminals of all coils of the entire motor stator assembly are arranged in the same area, reducing the instability of the motor stator size caused by the excessive length of the coil lead-out terminal, thereby improving the motor performance.

Optionally, along the axial direction of the motor stator, a second insulating layer is provided between the second conductive ring and the first conductive ring, and a third insulating layer is provided between the third conductive ring and the second conductive ring. The second insulating layer can prevent the first conductive ring from contacting the second conductive ring, thereby preventing the first phase coil from being connected to the second phase coil, and the third insulating layer can reduce the contact between the second conductive ring and the third conductive ring, thereby preventing the second phase coil from being connected to the third phase coil, thereby improving the control accuracy of each phase coil on the rotor speed.

Optionally, the motor stator assembly further comprises a fourth conductive ring, which is arranged on the side of the yoke away from the first conductive ring along the axial direction of the motor stator; the output end of the first phase coil, the output end of the second phase coil and the output end of the third phase coil are all connected to the fourth conductive ring. The output end of the first phase coil, the output end of the second phase coil and the output end of the third phase coil are all connected to the fourth conductive ring, so that the connection size of the lead wires of the output end of the first phase coil, the output end of the second phase coil and the output end of the third phase coil can be controlled, thereby making the size of the entire motor stator assembly controllable.

Optionally, the motor stator assembly further includes a plurality of second rubber-coated parts, each of which is sleeved on the corresponding magnetic pole, and along the circumference of the motor stator, a first mounting part and a second mounting part are respectively provided on the side close to each other of two adjacent second rubber-coated parts; the motor stator assembly further includes a first sensor, which is mounted on the first mounting part and the second mounting part to detect the rotation speed of the rotor. The first mounting part and the second mounting part form a mounting position for mounting the first sensor, so that the mounting position of the first sensor is determined, thereby improving the control accuracy of the first sensor on the rotor rotation speed.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

FIG1 is a schematic diagram of a partial structure of a stator assembly of a motor of the present application;

FIG2 is a schematic structural diagram of a stator assembly of a motor of the present application;

FIG3 is a schematic structural diagram of a first conductive ring of the present application;

FIG4 is a schematic diagram of the structure of the first rubber encapsulation part of the present application;

FIG. 5 is an enlarged view of region A in FIG. 2 .

[Description of Reference Numerals]

1: motor stator; 11: yoke; 111: first side; 12: magnetic pole; 21: first phase coil; 22: second phase coil; 23: third phase coil; 31: first conductive ring; 311: first limiting hole; 312: second limiting hole; 313: first lead-in terminal; 314: first lead-out terminal; 32: second conductive ring; 321: second lead-in terminal; 322: second lead-out terminal; 33: third conductive ring; 331: third lead-in terminal; 332: third lead-out terminal; 34: fourth conductive ring; 341: fourth lead-in terminal; 342: fourth lead-out terminal; 4: first rubber-coated part; 41: first insulating layer; 411: first limiting column; 412: second limiting column; 42: second insulating layer; 43: third insulating layer; 44: fourth insulating layer; 5: second rubber-coated part; 51: first mounting part; 52: second mounting part; 6: first sensor.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

The term "and/or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.

The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

When the U phase, V phase, W phase and neutral line of the motor stator coil are connected according to the wiring schematic diagram, the input end of one U phase coil is welded to the input end of another U phase coil, and then the two welded and plastic-wrapped U phase wires are led out. The same is true for the V phase and the W phase. The output ends of the U phase, the V phase and the W phase are connected as the neutral line. Since the manual lead-out wire connection will cause the height of the solder joint to be too high, the size of the motor stator assembly will increase, thereby interfering with the installation of the entire motor stator. And because the two coils of the same phase are far apart, the coil pulling is easy to damage the insulation layer during manual wiring, and then a short circuit risk occurs. Therefore, a new motor stator assembly structure is needed, which can reduce the increase in the size of the motor stator assembly caused by wiring; and reduce the damage to the insulation layer of the lead wire caused by long-distance wiring, thereby reducing the risk of short circuit caused by the rupture of the insulation layer of the lead wire.

1, 2 and 5, an embodiment of the present application provides a motor stator assembly, which includes a motor stator 1, a first conductive ring 31, a plurality of first phase coils 21, a plurality of second phase coils 22 and a plurality of third phase coils 23. The motor stator 1 includes a yoke 11 and a plurality of magnetic poles 12. The plurality of magnetic poles 12 are distributed at intervals along the circumferential direction of the yoke 11. Each magnetic pole 12 is arranged on the inner circumferential surface of the yoke 11 and extends toward the radial inner side of the yoke 11. Along the circumferential direction of the yoke 11, the plurality of first phase coils 21, the plurality of second phase coils 22 and the plurality of third phase coils 23 are arranged alternately in sequence. Each first phase coil 21, each second phase coil 22 and each third phase coil 23 are sleeved on the corresponding magnetic pole 12. Along the axial direction of the motor stator 1, the first conductive ring 31 is arranged on one side of the yoke 11. The first conductive ring 31 is provided with a first lead-out terminal 314 and a plurality of first lead-in terminals 313. Each first lead-in terminal 313 is connected to the input end of the corresponding first phase coil 21. In an optional embodiment, the first phase coil 21 is a U phase coil, the second phase coil 22 is a V phase coil, and the third phase coil 23 is a W phase coil. The output end of the first phase coil 21, the output end of the second phase coil 22, and the output end of the third phase coil 23 are connected to form a neutral line. The magnetic field in the motor is controlled by controlling the current of the first phase coil 21, the second phase coil 22, and the third phase coil 23, thereby realizing the regulation of the rotor speed.

In the motor stator assembly proposed in the embodiment of the present application, the first conductive ring 31 is spaced apart from the motor stator 1, and the first conductive ring 31 is provided with a plurality of first lead-in terminals 313, the number of which corresponds to the number of the first phase coils 21, and the input end of each first phase coil 21 is welded to the corresponding first lead-in terminal 313. By providing the first conductive ring 31, the input end of each first phase coil 21 is connected to the first lead-in terminal 313 corresponding to the first conductive ring 31, so that the connection size of the lead-out wire at the input end of the first phase coil 21 can be controlled, and thus the size of the entire motor stator assembly can be controlled. The current enters the first conductive ring 31 from the first lead-out terminal 314, and then enters the corresponding first phase coil 21 from the first lead-in terminal 313. The first conductive ring 31 has conductivity, such as the first conductive ring 31 is a copper ring, and the input end of the first phase coil 21 connected to the first lead-in terminal 313 and the lead-out wire connected to the first lead-out terminal 314 are connected through the first conductive ring 31. The first conductive ring 31 is provided to reduce the long-distance wiring of the input end of the first phase coil 21, thereby reducing the damage of the insulation layer, and further reducing the risk of short circuit caused by contact between the lead wires of each phase coil.

Optionally, referring to FIG. 1 , FIG. 3 and FIG. 4 , along the axial direction of the motor stator 1, the yoke 11 has a first side surface 111; the motor stator assembly further includes a first rubber coating portion 4, the first rubber coating portion 4 has a first insulating layer 41, and along the axial direction of the motor stator 1, the first insulating layer 41 is disposed between the first side surface 111 and the first conductive ring 31. The first insulating layer 41 is disposed between the yoke 11 and the first conductive ring 31 to reduce the contact between the lamination of the yoke 11 and the first conductive ring 31, thereby reducing the influence of the yoke 11 on the current of the first phase coil 21.

Optionally, referring to Fig. 1 and Fig. 4, a first limiting post 411 is provided on the first insulating layer 41, and a first limiting hole 311 cooperating with the first limiting post 411 is provided on the first conductive ring 31. By providing the first limiting post 411 on the first insulating layer 41, the first limiting hole 311 of the first conductive ring 31 cooperates with the first limiting post 411, so as to realize the positioning of the first conductive ring 31, prevent the first conductive ring 31 from shifting in the radial direction of the motor stator assembly, thereby reducing the structural and performance instability of the motor stator assembly caused by the shift of the first conductive ring 31, and improving the structural and performance stability of the motor stator assembly.

In an optional embodiment, the first lead terminal 314 is close to the first limiting hole 311, so that the first lead terminal 314 is close to the first limiting column, so that the position of the first lead terminal 314 is determined, and then the position of the lead wire of the entire motor stator assembly is determined, reducing the long-distance wiring in the motor stator assembly. In another optional embodiment, two spaced-apart first limiting columns 411 are provided on the first insulating layer 41, and the first conductive ring 31 is provided with a first limiting hole 311 corresponding to the first limiting column 411. The first lead terminal 314 is located between the two first limiting columns 411, so that the position of the first lead terminal 314 is determined, and then the position of the lead wire of the entire motor stator assembly is determined, reducing the long-distance wiring in the motor stator assembly and playing a role in error prevention.

Optionally, referring to Figures 1 and 4, a second limiting column 412 is provided on the first insulating layer 41, a second limiting hole 312 cooperating with the second limiting column 412 is provided on the first conductive ring 31, and the diameter of the first limiting column 411 is different from the diameter of the second limiting column 412. A second limiting post 412 is provided on the first insulating layer 41, and a second limiting hole 312 cooperating with the second limiting post 412 is provided on the first conductive ring 31. On the one hand, the first conductive ring 31 can be limited to prevent the first conductive ring 31 from being offset in the circumferential and radial directions of the motor stator 1; on the other hand, the diameter of the first limiting post 411 is different from that of the second limiting post 412, so that the first conductive ring 31 can be limited in the circumferential and radial directions of the motor stator 1. At the same time, the first lead-in terminal 313 of the first conductive ring 31 and the input end of the first phase coil 21 are correspondingly provided, and the position of the first lead-out terminal 314 can be located in a set area, which can reduce the long-distance routing of each first phase coil 21 and the first lead-in terminal 313 during the connection process, and the long-distance routing of the lead-out wire of the motor stator assembly led out from the first lead-out terminal 314, thereby reducing the risk of short circuit caused by damage to the insulation layer of the lead-out wire due to long-distance routing.

Optionally, referring to Figures 1, 2, and 5, the motor stator assembly also includes a second conductive ring 32, which is arranged on a side of the first conductive ring 31 away from the yoke 11 along the axial direction of the motor stator 1, and the second conductive ring 32 is provided with a second lead-out terminal 322 and a plurality of second lead-in terminals 321, and each second lead-in terminal 321 is connected to the input end of the corresponding second phase coil 22; the motor stator assembly also includes a third conductive ring 33, which is arranged on a side of the second conductive ring 32 away from the yoke 11 along the axial direction of the motor stator 1, and the third conductive ring 33 is provided with a third lead-out terminal 332 and a plurality of third lead-in terminals 331, and each third lead-in terminal 331 is connected to the input end of the corresponding third phase coil 23. The input end of the second phase coil 22 is connected to the second lead-in terminal 321 of the second conductive ring 32, so that the connection size of the lead-out wire at the input end of the second phase coil 22 can be controlled; the input end of the third phase coil 23 is connected to the third lead-in terminal 331 of the third conductive ring 33, so that the connection size of the lead-out wire at the input end of the third phase coil 23 can be controlled, thereby making the size of the entire motor stator assembly controllable. The current enters the second lead-out terminal 322 from the lead-out wire and then enters the second conductive ring 32, and enters the second phase coil 22 through the second lead-in terminal 321, reducing the long-distance routing of the lead-out wire at the input end of the second phase coil 22; the current enters the third lead-out terminal 332 from the lead-out wire and then enters the third conductive ring 33, and enters the third phase coil 23 through the third lead-in terminal 331, reducing the long-distance routing of the lead-out wire at the input end of the third phase coil 23, thereby reducing the damage of the insulation layer, thereby reducing the risk of short circuit of the coil.

Specifically, the second conductive ring 32 and the third conductive ring 33 are conductive. If the second conductive ring 32 and the third conductive ring 33 are copper rings, the input end of the second phase coil 22 connected to the second lead-in terminal 321 and the lead-out wire of the second lead-out terminal 322 are connected through the second conductive ring 32, and the wire is omitted between the second lead-in terminal 321 and the second lead-out terminal 322; the input end of the third phase coil 23 connected to the third lead-in terminal 331 and the lead-out wire of the third lead-out terminal 332 are connected through the third conductive ring 33, and the wire is omitted between the third lead-in terminal 331 and the third lead-out terminal 332. The provision of the second conductive ring 32 and the third conductive ring 33 further reduces the lead-out wires in the motor stator assembly, reduces the risk of short circuit due to lead-out wire damage, and can reduce the motor stator assembly size exceeding the predetermined value due to too many lead-out wires in the motor stator assembly, thereby making the size of the motor stator assembly controllable, and reducing the risk of interference caused by the motor stator assembly size exceeding the predetermined value in the subsequent assembly process.

Optionally, the second conductive ring 32 and the third conductive ring 33 are respectively provided with a third limiting hole and a fourth limiting hole that cooperate with the first limiting column 411. The second conductive ring 32 is sleeved on the first limiting column 411 through the third limiting hole to limit the second conductive ring 32 along the axial direction of the motor stator 1, and prevent the second conductive ring 32 from being offset along the axial direction of the motor stator 1; the third conductive ring 33 is sleeved on the first limiting column 411 through the fourth limiting hole to limit the third conductive ring 33 along the axial direction of the motor stator 1, and prevent the third conductive ring 33 from being offset along the axial direction of the motor stator 1. It should be understood that the cooperation mode of the second conductive ring 32 and the third conductive ring 33 with the first limiting column 411 is the same as the cooperation mode of the first conductive ring 31 with the first limiting column 411; the cooperation mode of the second conductive ring 32 and the third conductive ring 33 with the second limiting column 412 is the same as the cooperation mode of the first conductive ring 31 with the second limiting column 412. Furthermore, the second conductive ring 32 has the same structural configuration as the third conductive ring 33 and the first conductive ring 31 , and will not be described in detail herein.

Optionally, referring to Fig. 1, Fig. 2 and Fig. 5, along the circumference of the motor stator 1, the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 are arranged adjacent to each other. The projections of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 along the axial direction of the motor stator 1 are close, so that the lead-out terminals of all coils of the entire motor stator assembly are arranged in the same area, reducing the instability of the size of the motor stator 1 caused by the excessive length of the coil lead-out terminals, thereby improving the motor performance.

It should be understood that the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 are arranged adjacent to each other, which means that the projections of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 along the axial direction of the motor stator 1 are close to each other, such as the projections of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 along the axial direction of the motor stator 1 coincide with each other; or the projections of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 along the axial direction of the motor stator 1 are connected end to end along the circumferential direction of the motor stator 1; or the projections of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 along the axial direction of the motor stator 1 are connected end to end along the circumferential direction of the motor stator 1. The projection of the first lead terminal 314 along the axial direction of the motor stator 1 and the projection of the second lead terminal 322 along the axial direction of the motor stator 1 in the circumferential direction of the motor stator 1 have a gap; or the central angle occupied by the projection of the first lead terminal 314 along the axial direction of the motor stator 1 and the projection of the second lead terminal 322 along the axial direction of the motor stator 1 in the circumferential direction of the motor stator 1, the central angle occupied by the projection of the second lead terminal 322 along the axial direction of the motor stator 1 and the projection of the third lead terminal 332 along the axial direction of the motor stator 1 in the circumferential direction of the motor stator 1 are 1°; or the central angle occupied by the projection of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 along the axial direction of the motor stator 1 as a whole in the circumferential direction of the motor stator 1 is less than 30°. In the present application, the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 are arranged adjacent to each other, which means that the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 are close to each other to ensure that the lead wires of the first phase coil 21, the second phase coil 22 and the third phase coil 23 and the neutral line are all in a certain area of the motor stator 1, so that all the lead wires can be concentrated as much as possible, reducing the size and performance instability of the motor stator 1 due to the excessive length of the coil lead wires, and improving the size and performance stability of the motor stator assembly.

In an optional embodiment, two spaced-apart first limiting posts 411 and a plurality of spaced-apart second limiting posts 412 are provided on the first insulating layer 41, and the two first limiting posts 411 and the plurality of second limiting posts 412 are spaced-apart and distributed along the circumferential direction of the motor stator 1. The first conductive ring 31, the second conductive ring 32 and the third conductive ring 33 have limiting holes matched with the two first limiting posts 411, and the first conductive ring 31, the second conductive ring 32 and the third conductive ring 33 have limiting holes matched with the plurality of second limiting posts 412. The first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 are all located between the two first limiting posts 411, so that the positions of the first lead terminal 314, the second lead terminal 322 and the third lead terminal 332 are determined in a determined area of the motor stator assembly, thereby determining the position of the lead wire of the entire motor stator assembly, reducing the long-distance wiring in the motor stator assembly and playing a role in preventing errors. Optionally, a central angle occupied by the two first limiting columns 411 along the circumferential direction of the motor stator 1 is less than 30°.

Optionally, along the axial direction of the motor stator 1, a second insulating layer 42 is provided between the second conductive ring 32 and the first conductive ring 31, and a third insulating layer 43 is provided between the third conductive ring 33 and the second conductive ring 32. The second insulating layer 42 can prevent the first conductive ring 31 from contacting the second conductive ring 32, causing the first phase coil 21 to communicate with the second phase coil 22, and the third insulating layer 43 can reduce the contact between the second conductive ring 32 and the third conductive ring 33, thereby causing the second phase coil 22 to communicate with the third phase coil 23, thereby improving the control accuracy of each phase coil on the rotor speed. In an optional embodiment, the second insulating layer 42 and the third insulating layer 43 are insulating paper.

Optionally, the motor stator assembly further includes a fourth conductive ring 34, which is arranged on the yoke 11 at a side away from the first conductive ring 31 along the axial direction of the motor stator 1; the output end of the first phase coil 21, the output end of the second phase coil 22 and the output end of the third phase coil 23 are all connected to the fourth conductive ring 34. The fourth conductive ring 34 also has a fourth lead-out terminal 342. The output end of the first phase coil 21, the output end of the second phase coil 22 and the output end of the third phase coil 23 are connected to form a neutral line, and the output end of the first phase coil 21, the output end of the second phase coil 22 and the output end of the third phase coil 23 are all connected to the fourth conductive ring 34, and then led out through the fourth lead-out terminal 342, so that the lead-out connection size of the output end of the first phase coil 21, the output end of the second phase coil 22 and the output end of the third phase coil 23 can be controlled, thereby making the size of the entire motor stator assembly controllable.

In an optional embodiment, two spaced-apart first limiting posts 411 and a plurality of spaced-apart second limiting posts 412 are provided on the first insulating layer 41, and the two first limiting posts 411 and the plurality of second limiting posts 412 are spaced-apart and distributed along the circumferential direction of the motor stator 1. The first conductive ring 31, the second conductive ring 32, the third conductive ring 33, and the fourth conductive ring 34 have limiting holes matched with the two first limiting posts 411, and the first conductive ring 31, the second conductive ring 32, the third conductive ring 33, and the fourth conductive ring 34 have limiting holes matched with the plurality of second limiting posts 412. The first lead terminal 314, the second lead terminal 322, the third lead terminal 332, and the fourth lead terminal 342 are all located between the two first limiting columns 411, so that the positions of the first lead terminal 314, the second lead terminal 322, the third lead terminal 332, and the fourth lead terminal 342 are determined in a certain area of the motor stator assembly, thereby determining the position of the lead wire of the entire motor stator assembly, reducing the long-distance wiring in the motor stator assembly and playing a role in error prevention. In this application, as long as the first lead terminal 314, the second lead terminal 322, the third lead terminal 332, and the fourth lead terminal 342 are set close to each other along the axial projection of the motor stator 1, and their lead wires can be led out in a predetermined area of the motor stator assembly, the interval of the first lead terminal 314, the second lead terminal 322, the third lead terminal 332, and the fourth lead terminal 342 along the axial projection of the motor stator 1 is not limited in this application.

Optionally, referring to FIG2 , the motor stator assembly further includes a plurality of second rubber-coated parts 5, each second rubber-coated part 5 is sleeved on a corresponding magnetic pole 12, and along the circumferential direction of the motor stator 1, a first mounting part 51 and a second mounting part 52 are respectively provided on the side close to each other of two adjacent second rubber-coated parts 5; the motor stator assembly further includes a first sensor 6, and the first sensor 6 is mounted on the first mounting part 51 and the second mounting part 52 to detect the rotation speed of the rotor. The first mounting part 51 and the second mounting part 52 form a mounting position for mounting the first sensor 6, so that the mounting position of the first sensor 6 is determined, and the control accuracy of the first sensor 6 on the rotor rotation speed is improved.

Specifically, the edges of the two second rubber-coated parts 5 corresponding to the two adjacent magnetic poles 12 that are close to each other have a notch extending axially along the motor stator 1, and the notch is configured as a first mounting part 51 and a second mounting part 52, and the first mounting part 51 and the second mounting part 52 are configured as mounting positions for mounting the first sensor 6. The first sensor 6 is placed in the mounting position, and the first sensor 6 is fixed to the mounting position by glue. In a specific embodiment, the first sensor 6 is a Hall sensor, and the motor stator assembly has two Hall sensors, and the two Hall sensors are symmetrically distributed along the axial direction of the motor stator assembly. In other embodiments, the number of the first sensors 6 can be more, and the present application is not limited thereto. The installation position of the Hall sensor is determined by setting the first mounting position and the second mounting position.

In an optional embodiment, the notch on the second rubber coating part 5 extends in the axial direction of the motor stator 1 and penetrates one side of the second rubber coating part 5 along the axial direction of the motor stator 1, so as to facilitate the placement of the first sensor 6 on the first mounting part 51 and the second mounting part 52. In another optional embodiment, the notch of the second rubber coating part 5 extends in the axial direction of the motor stator 1 and the two ends are spaced from the axial edge of the second rubber coating part 5 along the motor stator 1. It should be understood that the structural arrangement of the first mounting position and the second mounting position can be determined according to the shape of the Hall sensor.

In an optional embodiment, the first rubber coating portion 4 at least covers the yoke portion 11 on opposite sides along the axial direction of the motor stator 1 to form a first insulating layer 41 and a second insulating layer 42. The first insulating layer 41 separates the first conductive ring 31 from the motor stator 1, and the fourth insulating layer 44 separates the center line from the motor stator 1. The second insulating layer 42 has the same structural arrangement as the first insulating layer 41, and also has a first limiting column and a second limiting column. The fourth conductive ring 42 also has limiting holes that cooperate with the first limiting column 411 and the second limiting column 412, respectively.

The first lead-in terminal 313, the second lead-in terminal 321, the third lead-in terminal 331 and the fourth lead-in terminal 341 and the first lead-out terminal 314, the second lead-out terminal 322, the third lead-out terminal 332 and the fourth lead-out terminal 342 can be configured as a connection hole or a connection groove. In a specific embodiment, the first lead-in terminal 313, the second lead-in terminal 321, the third lead-in terminal 331 and the fourth lead-in terminal 341 and the first lead-out terminal 314, the second lead-out terminal 322, the third lead-out terminal 332 and the fourth lead-out terminal 342 are configured as a connection groove, which is convenient for the lead-out wire to be placed in the connection groove, while reducing the height of the solder joint formed after welding. The connection between the first lead terminal 314 and the main body of the first conductive ring 31 has grooves on opposite sides of the circumference of the motor stator 1, the connection between the second lead terminal 322 and the main body of the second conductive ring 32 has grooves on opposite sides of the circumference of the motor stator 1, the connection between the third lead terminal 332 and the main body of the third conductive ring 33 has grooves on opposite sides of the circumference of the motor stator 1, and the connection between the fourth lead terminal 342 and the main body of the fourth conductive ring 34 has grooves on opposite sides of the circumference of the motor stator 1, so that the first lead terminal 314, the second lead terminal 322, the third lead terminal 332 and the fourth lead terminal 342 are conveniently folded upward, thereby reducing the contact between the first lead terminal 314, the second lead terminal 322, the third lead terminal 332 and the fourth lead terminal 342 and the shell.

In the embodiment of the present application, the motor stator 1 includes a yoke 11 and a magnetic pole 12, the yoke 11 is covered with a first rubber-coated portion 4, the first rubber-coated portion 4 is provided with a first limiting column 411 and a second limiting column 412 on both sides of the yoke 11 along the axial direction of the motor stator 1, the first conductive ring 31, the second conductive ring 32 and the third conductive ring 33 are respectively provided with a first limiting hole 311, a third limiting hole and a fourth limiting hole matched with the first limiting column 411, and the first conductive ring 31, the second conductive ring 32 and the third conductive ring 33 are also respectively provided with a limiting hole matched with the second limiting column 412. The first conductive ring 31, the second conductive ring 32 and the third conductive ring 33 are arranged on one side of the yoke 11 along the axial direction of the motor stator 1, and the fourth conductive ring 34 is arranged on the other side of the yoke 11 along the axial direction of the motor stator 1, and the fourth conductive ring 34 has a limiting hole matched with the first limiting column 411 and the second limiting column 412. The diameters of the first limiting column 411 and the second limiting column 412 are different. The first limiting column 411 and the second limiting column 412 can prevent the first conductive ring 31, the second conductive ring 32, the third conductive ring 33, and the fourth conductive ring 34 from shifting, and can orient and position the first conductive ring 31, the second conductive ring 32, the third conductive ring 33, and the fourth conductive ring 34, so that the lead wires of the motor stator 1 can be led out from the same direction.

The motor stator 1 has two first-phase coils 21, two second-phase coils 22, and two third-phase coils 23. The first conductive ring 31 has two first lead-in terminals 313 and one first lead-out terminal 314. The input ends of the two first-phase coils 21 are respectively welded to the two first lead-in terminals 313, and the lead-out wires welded to the first lead-out terminals 314 and led out are connected to the input ends of the two first-phase coils 21 through the first conductive ring 31. The second conductive ring 32 has two second lead-in terminals 321 and one second lead-out terminal 322. The input ends of the two second-phase coils 22 are respectively welded to the two second lead-in terminals 321, and the lead-out wires welded to the second lead-out terminals 322 and led out are connected to the input ends of the two second-phase coils 22 through the second conductive ring 32. The third conductive ring 33 has two third lead-in terminals 331 and one third lead-out terminal 332. The input ends of the two third phase coils 23 are respectively welded to the two third lead-in terminals 331, and the lead-out wires welded to the first lead-out terminal 314 and led out are connected to the input ends of the two third phase coils 23 through the third conductive ring 33. The fourth wiring has three fourth lead-in terminals 341 and one fourth lead-out terminal 342. The two first phase coils 21, the two second phase coils 22 and the two third phase coils 23 are alternately arranged in sequence, and the output ends of adjacent coils are connected to the adjacent corresponding fourth lead-in terminals 341, and the lead-out wires welded to the fourth lead-out terminal 342 and led out are connected to the output ends of the two first phase coils 21, the output ends of the two second phase coils 22 and the outputs of the two third phase coils 23 through the fourth conductive ring 34.

In the present application, the first conductive ring 31, the second conductive ring 32, the third conductive ring 33 and the fourth conductive ring 34 are conductive, for example, the first conductive ring 31, the second conductive ring 32, the third conductive ring 33 and the fourth conductive ring 34 are all copper rings. The first lead-in terminal 313 is connected to the first phase coil 21, and the first lead-in terminal 313 and the first lead-out terminal 314 are connected through the first conductive ring 31. There is no wire between the first lead-in terminal 313 and the first lead-out terminal 314. The current of the first phase coil 21 can be controlled by welding the first lead-out terminal 314 with a wire and connecting to an external circuit. The second lead-in terminal 321 is connected to the second phase coil 22, and the second lead-in terminal 321 and the second lead-out terminal 322 are connected through the second conductive ring 32. There is no wire between the second lead-out terminal 322 and the second lead-in terminal 321. There is only a wire welded to the second lead-out terminal 322 with a wire and connecting to an external circuit to control the current of the second phase coil 22. The third lead-in terminal 331 is connected to the third phase coil 23, and the third lead-in terminal 331 and the third lead-out terminal 332 are connected through the third conductive ring 33. There is no wire between the third lead-out terminal 332 and the third lead-in terminal 331. It is only necessary to weld the third lead-out terminal 332 with a wire and connect it to an external circuit to control the current of the third phase coil 23. The output end of each phase coil is connected to the fourth lead-in terminal 341, and the fourth lead-out terminal 341 and the fourth lead-out terminal 342 are connected through the fourth conductive ring 34. There is no wire between the fourth lead-out terminal 342 and the fourth lead-out terminal 341. It is only necessary to weld the fourth lead-out terminal 342 with a wire and then lead the wire to an external circuit. In the above-mentioned setting, the corresponding conductive ring is connected to the corresponding coil, which reduces the confusion of the three-phase coil wiring, makes the entire wiring process clear and neat, and reduces the risk of contact between the lead-out wires of each phase coil; and reduces the wiring length in the motor stator 1, reduces the problem of the size increase of the motor stator assembly due to the wiring, and reduces the risk of short circuit caused by long-distance wiring.

It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the appended claims.

Claims (10)

1. A motor stator assembly, comprising: A motor stator, the motor stator comprising a yoke and a plurality of magnetic poles, the plurality of magnetic poles being distributed at intervals along the circumference of the yoke, each of the magnetic poles being arranged on the inner circumferential surface of the yoke and extending toward the radial inner side of the yoke; A plurality of first-phase coils, a plurality of second-phase coils and a plurality of third-phase coils, wherein the plurality of first-phase coils, the plurality of second-phase coils and the plurality of third-phase coils are arranged alternately in sequence along the circumferential direction of the yoke, and each of the first-phase coils, each of the second-phase coils and each of the third-phase coils is sleeved on the corresponding magnetic pole; The first conductive ring is arranged on one side of the yoke along the axial direction of the motor stator. The first conductive ring is provided with a first lead-out terminal and a plurality of first lead-in terminals. Each of the first lead-in terminals is connected to the input end of the corresponding first phase coil. 2. The motor stator assembly according to claim 1, characterized in that, along the axial direction of the motor stator, the yoke has a first side surface; The motor stator assembly further includes a first rubber-coated portion, wherein the first rubber-coated portion has a first insulating layer, and along the axial direction of the motor stator, the first insulating layer is disposed between the first side surface and the first conductive ring. 3 . The motor stator assembly according to claim 2 , wherein a first limiting column is provided on the first insulating layer, and a first limiting hole cooperating with the first limiting column is provided on the first conductive ring. 4. The motor stator assembly according to claim 3 is characterized in that a second limiting column is provided on the first insulating layer, a second limiting hole matching with the second limiting column is provided on the first conductive ring, and a diameter of the first limiting column is different from a diameter of the second limiting column. 5. The motor stator assembly according to claim 3, characterized in that the motor stator assembly further comprises a second conductive ring, which is arranged on a side of the first conductive ring away from the yoke along the axial direction of the motor stator, and the second conductive ring is provided with a second lead-out terminal and a plurality of second lead-in terminals, and each second lead-in terminal is connected to an input end of the corresponding second phase coil; The motor stator assembly also includes a third conductive ring, which is arranged on a side of the second conductive ring away from the yoke along the axial direction of the motor stator. The third conductive ring is provided with a third lead-out terminal and a plurality of third lead-in terminals, and each of the third lead-in terminals is connected to the input end of the corresponding third phase coil. 6 . The motor stator assembly according to claim 5 , wherein the second conductive ring and the third conductive ring are respectively provided with a third limiting hole and a fourth limiting hole that cooperate with the first limiting column. 7 . The motor stator assembly according to claim 5 , wherein the first lead terminal, the second lead terminal and the third lead terminal are disposed adjacent to each other along a circumferential direction of the motor stator. 8. The motor stator assembly according to claim 5, characterized in that, along the axial direction of the motor stator, a second insulating layer is provided between the second conductive ring and the first conductive ring, and a third insulating layer is provided between the third conductive ring and the second conductive ring. 9. The motor stator assembly according to claim 5, characterized in that the motor stator assembly further comprises a fourth conductive ring, and along the axial direction of the motor stator, the fourth conductive ring is arranged on a side of the yoke away from the first conductive ring; The output end of the first phase coil, the output end of the second phase coil and the output end of the third phase coil are all connected to the fourth conductive ring. 10. The motor stator assembly according to any one of claims 1 to 9, characterized in that the motor stator assembly further comprises a plurality of second rubber-coated parts, each of the second rubber-coated parts is sleeved on the corresponding magnetic pole, and along the circumferential direction of the motor stator, two adjacent second rubber-coated parts are respectively provided with a first mounting part and a second mounting part on one side close to each other; The motor stator assembly further includes a first sensor, which is mounted on the first mounting portion and the second mounting portion to detect a rotation speed of the rotor.