Electric machine stator and electric machine

Abstract

The application provides a motor stator and a motor. The motor stator comprises a stator core (1), a winding (2) connected to the stator core (1), the winding (2) comprising a plurality of lead-out portions (22) located on one side of the stator core (1) in the axial direction, a current collector ring (3) comprising a plurality of wires (31), at least one end of the wire (31) being connected to the lead-out portion (22), and a wiring terminal (5) surrounding and compressing the wire (31) and the lead-out portion (22), so that the wire (31) is electrically connected to the lead-out portion (22).

Description

Technical Field

[0001] This application relates to an electric motor stator and an electric motor. Background Technology

[0002] CN119921492A discloses a modular connection unit in which three holding components are stacked and plugged in, and three connecting wires are respectively connected to the three-phase excitation coils. The three connecting wires are respectively disposed in the three holding components, and are welded to the stator windings. The welding of the connecting wires to the stator windings requires high welding quality. The connecting wires have special connection structures such as contact plates and feet, requiring copper plate stamping for formation, resulting in low material utilization, complex processes, and high costs. Utility Model Content

[0003] This application aims to provide an electric motor stator and motor that reduces the cost of the electric motor stator and motor.

[0004] This application provides an embodiment of a motor stator, comprising: a stator core; a winding connected to the stator core, the winding including a plurality of leads located on one axial side of the stator core; a slip ring including a plurality of wires, at least one end of the wires being connected to the leads; and a terminal block surrounding and pressing the wires and the leads, thereby electrically connecting the wires to the leads.

[0005] In at least one possible implementation, the motor stator further includes a slip ring retainer, the slip ring retainer being provided with a plurality of limiting holes, through which the lead-out portion and the wire pass, and the limiting holes positioning the end of the wire.

[0006] In at least one possible implementation, the limiting hole is "V"-shaped, with one side of the "V" extending to the periphery of the slip ring holder and forming an opening, and the other side of the "V" serving as a receiving portion to accommodate the lead-out portion and the wire.

[0007] In at least one possible implementation, one end of the other side is a connection end connected to the first side, and the other end of the other side is radially outward from the connection end.

[0008] In at least one possible implementation, the slip ring includes three sets of wires, the winding includes three-phase coils, and the three sets of wires are respectively connected to the three-phase coils, so that the coils of each phase are electrically connected through the wires.

[0009] In at least one possible implementation, the end of the wire not connected to the lead is used to connect to a battery or control component.

[0010] In at least one possible implementation, the terminal is made of a conductive material and is a hollow cylindrical shape.

[0011] The axial length of the terminal block is greater than the diameter of the wire and / or the lead-out portion or twice the diameter.

[0012] In at least one possible implementation, the wire includes a conductor and an insulating layer, the insulating layer being wrapped around the outside of the conductor.

[0013] In at least one possible implementation, the conductor has a circular cross-section, and the collector ring is composed of multiple conductors.

[0014] The embodiments of this application also propose an electric motor, which includes the motor stator described in any of the above technical solutions.

[0015] By adopting the above technical solution, multiple wires and winding leads are connected through terminals, and multiple wires act as slip rings. The wires do not have a special connection structure, are easy to manufacture, and can reduce costs. Attached Figure Description

[0016] Figure 1 A schematic diagram of a partial structure of the motor stator of an electric motor according to an embodiment of this application is shown.

[0017] Figure 2 A schematic diagram of a partial structure of an electric motor stator according to an embodiment of this application (slip ring retainer not shown) is shown.

[0018] Figure 3 A schematic diagram of a partial structure of a motor stator according to an embodiment of this application is shown (slip ring holder and terminals are not shown).

[0019] Figure 4 A schematic diagram of the slip ring structure of an electric motor stator according to an embodiment of this application is shown.

[0020] Figure 5 A cross-sectional view showing the connection positions of the conductors and windings of an electric motor stator according to an embodiment of this application is shown.

[0021] Figure 6 A cross-sectional view showing the connection positions of the conductors and windings of an electric motor stator according to an embodiment of this application is shown.

[0022] Figure 7 A schematic diagram of the slip ring holder for a motor stator according to an embodiment of this application is shown.

[0023] Explanation of reference numerals in the attached figures

[0024] 100 motor stator

[0025] 1. Stator core

[0026] 2 Winding 21 Winding body 22 Lead-out section

[0027] 3. Slip ring 31, wire 311, conductor 312, insulation layer

[0028] 4. Slip ring holder 41. Limiting hole 411. Opening 412. Receiving part

[0029] 5. Terminal blocks Detailed Implementation

[0030] To more clearly illustrate the above-mentioned objectives, features, and advantages of this application, specific embodiments of this application are described in detail in conjunction with the accompanying drawings in this section. Besides the embodiments described in this section, this application can also be implemented in other different ways. Those skilled in the art can make corresponding improvements, modifications, and substitutions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed in this section. The scope of protection of this application should be determined by the claims.

[0031] like Figures 1 to 7 As shown, embodiments of this application propose a motor stator and a motor. The motor may include a motor stator 100 and a motor rotor (not shown). The motor stator 100 may be cylindrical, and the motor rotor may rotate relative to the motor stator 100.

[0032] The motor stator 100 may include a stator core 1, windings 2, slip rings 3, slip ring fixing brackets 4, and terminals 5.

[0033] The stator core 1 can be cylindrical, and the stator core 1 is provided with a winding mounting slot for accommodating the winding 2, which can be connected to the stator core 1.

[0034] like Figure 3 As shown, the winding 2 may include multiple winding bodies 21 and multiple leads 22. The winding bodies 21 may be wound around the stator core 1 (e.g., the teeth of the stator core 1). Each winding body 21 may have one lead 22, and the multiple leads 22 may be located on one axial side of the stator core 1. The leads 22 may extend along the axial direction A of the motor stator. It is understood that the winding 2 is capable of bending and deformation, and the extension of the leads 22 along the axial direction A also includes extending approximately along the axial direction A. The leads 22 may be electrically connected to the slip ring 3.

[0035] like Figures 2 to 4As shown, the slip ring 3 may include multiple wires 31 of the same or different lengths. Each wire 31 may include a conductor 311 and an insulating layer 312, with the insulating layer 312 covering the conductor 311. The ends of the wires 31 are not covered by the insulating layer 312, thus exposing the conductor 311. Alternatively, the insulating layer 312 at the ends of the wires 31 may be removed.

[0036] At least one end of the wire 31 can be connected to the lead-out portion 22. One portion of the wire 31 has both ends connected to the lead-out portion 22; another portion of the wire 31 has one end connected to the lead-out portion 22 and the other end not connected to it, with the other end of the other portion of the wire 31 used to connect to a battery or control component (e.g., a motor controller). It is understood that the other end of the other portion of the wire 31 can be connected to the battery through the control component. The motor can be an electric motor or a generator.

[0037] The winding 2 may include three-phase coils, and the slip ring 3 includes three sets of wires 31. The three sets of wires 31 can be connected to the three-phase coils respectively, so that the coils of each phase are electrically connected through the wires 31.

[0038] The slip ring 3 is formed by multiple conductors, featuring a simple structure, ease of manufacture, and low cost. The conductors 31 can be standard parts, meaning they are readily available and do not require custom processing. The conductors 31 are easily procured and inexpensive. The conductors 311 can be made of conductive materials such as copper or aluminum. The conductors 311 can be formed through rolling and / or drawing processes, which are less expensive than stamping and suitable for mass production.

[0039] The specifications of the conductor 31 can be selected according to specific needs, the diameter of the conductor 311 can be selected according to the magnitude of the working current, and the thickness of the insulation layer 312 can be selected according to the working temperature and / or working voltage.

[0040] like Figure 2 , Figure 5 and Figure 6 As shown, the slip ring 3 and the lead-out portion 22 of the winding 2 can be crimped together via the terminal 5, with the conductor 311 and the lead-out portion 22 inserted into the terminal 5. Then, a special tool can be used to press the terminal 5, deforming it so that the terminal 5 can surround and press the conductor 311 and the lead-out portion 22 of the wire 31. The conductor 311 and the lead-out portion 22 can be pressed into contact, resulting in a large contact area and preventing them from easily coming out of the terminal 5.

[0041] The terminal 5 can be a hollow cylinder (including a roughly cylindrical shape). It can be understood that the terminal 5 can be cylindrical when it is not installed. After it is installed at the connection position between the conductor 311 and the lead-out part 22, it will be deformed due to compression. Its cross-sectional shape can be irregular and uncertain, but it is roughly cylindrical overall.

[0042] Terminal 5 can be a standard part, which is easy to manufacture and has a low cost. Here, "standard part" refers to something that can be purchased and does not require custom processing. The inner diameter of terminal 5 can be selected as needed; the inner diameter of terminal 5 (before extrusion) can be a round hole or an oblong hole.

[0043] Terminal 5 can be made of conductive materials such as copper or aluminum. Terminal 5 can carry current, which allows for a larger cross-sectional area of ​​the conductive part that can carry current, reducing the heat generation at the connection point between conductor 311 and lead-out part 22.

[0044] like Figure 5 As shown, the inner circumferential surface of the terminal 5 can contact the conductor 311 and the lead-out portion 22 of the wire 31, and they can have a conductive contact surface S. The axial length of the terminal 5 can be greater than the diameter of the wire 31 and / or the lead-out portion 22, or twice the diameter (preferably the larger of the diameter of the wire 31 and the diameter of the lead-out portion 22), and the axial length of the conductive contact surface S is relatively long. Compared to welding the conductor 311 and the lead-out portion 22, connecting the conductor 311 and the lead-out portion 22 through the terminal 5 can result in a larger axial contact conductive area between the conductor 311 and the lead-out portion 22, thereby reducing contact resistance and heat generation.

[0045] like Figure 1 and Figure 7 As shown, the slip ring holder 4 is annular in shape and may have multiple circumferentially arranged limiting holes 41. The number of limiting holes 41 may be the same as the number of terminals 5. Leads 22 and wires 31 can pass through the limiting holes 41, thereby positioning the ends of the wires 31 and fixing the relative positions of the multiple leads 22 and wires 31. During injection molding or potting, the relative positions of the multiple terminals 5 can be fixed.

[0046] Furthermore, the limiting hole 41 can be V-shaped, with one side of the V-shape extending to the periphery of the slip ring holder 4 and forming an opening 411. The other side of the V-shape can serve as a receiving portion 412, which can accommodate the lead-out portion 22 and the wire 31. The receiving portion 412 can extend circumferentially (including generally circumferentially) along the slip ring holder 4. Optionally, one end of the other side is a connecting end connected to one side, and the other end can be referred to as the end. The end can be radially outward from the connecting end. The angle between the two sides of the V-shape can be less than 90 degrees.

[0047] The connection between the lead-out part 22 and the wire 31 can enter through the opening 411 of the “V”-shaped limiting hole 41 and be placed in the receiving part 412, which can prevent the connection between the lead-out part 22 and the wire 31 from moving or tilting under the action of external force.

[0048] It is understood that the lead-out part 22 and the wire 31 can be connected together by the terminal 5 and then enter the receiving part 412 through the opening 411. Alternatively, the terminal 5 can be installed after the lead-out part 22 and the wire 31 pass through the limiting hole 41. In this case, the limiting hole 41 may not have an opening. The limiting hole 41 may be rectangular, oval, or the like.

[0049] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.

[0050] It is understood that, in this application, when the number of parts or components is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of parts or components shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not restrictive, and can be understood as multiple, i.e., two or more; however, this does not mean that this application excludes the case of one.

[0051] In this application, unless otherwise expressly stated or limited, terms such as "installation," "assembly," "connection," "linking," "joining," "linking," "abutment," "communication," "connection," "conduction," "fixing," and "fastening" should be interpreted broadly, for example, they can be direct or indirect. For instance, regarding connection, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise expressly stated or limited. For instance, regarding communication / conduction, it can be direct communication / conduction or indirect communication / conduction through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0052] In this application, unless otherwise expressly stated or limited, a component being disposed / installed / located / enclosed / placed within, inside, or incorporated in another component can be either of the following two situations: a portion or a majority of the one component is located within the other component; or the one component is completely enclosed within the other component.

[0053] Although the present application has been described in detail using the above embodiments, it will be apparent to those skilled in the art that the present application is not limited to the embodiments described herein. The present application can be modified and implemented as alternative embodiments without departing from the spirit and scope of the present application as defined by the claims. Therefore, the description in this specification is for illustrative purposes only and does not have any limiting meaning for the present application.

Claims

1. A motor stator, characterized in that, include: Stator core; A winding connected to the stator core, the winding including a plurality of leads located on one axial side of the stator core; A slip ring, the slip ring comprising a plurality of wires, at least one end of the wires being connected to the lead-out portion; as well as A terminal block that surrounds and presses against the wire and the lead-out portion, so that the wire is electrically connected to the lead-out portion.

2. The motor stator according to claim 1, characterized in that, The motor stator also includes a slip ring fixing bracket, which is provided with multiple limiting holes. The lead-out part and the wire pass through the limiting holes, and the limiting holes position the end of the wire.

3. The motor stator according to claim 2, characterized in that, The limiting hole is "V" shaped, with one side of the "V" extending to the periphery of the collector ring fixing frame and forming an opening, and the other side of the "V" serving as a receiving portion to accommodate the lead-out portion and the wire.

4. The motor stator according to claim 3, characterized in that, One end of the other side is a connection end that is connected to the first side, and the other end of the other side is radially outward compared to the connection end.

5. The motor stator according to claim 1, characterized in that, The slip ring includes three sets of wires, and the winding includes three-phase coils. The three sets of wires are respectively connected to the three-phase coils, so that the coils of each phase are electrically connected through the wires.

6. The motor stator according to claim 1, characterized in that, The end of the wire not connected to the lead is used to connect to a battery or control component.

7. The motor stator according to claim 1, characterized in that, The terminal block is made of conductive material and is a hollow cylindrical shape. The axial length of the terminal block is greater than the diameter of the wire and / or the lead-out portion or twice the diameter.

8. The motor stator according to claim 1, characterized in that, The wire includes a conductor and an insulating layer, the insulating layer being wrapped around the conductor.

9. The motor stator according to claim 1, characterized in that, The cross-section of the conductor is circular, and the collector ring is composed of multiple conductors.

10. An electric motor, characterized in that, The motor stator includes any one of claims 1 to 9.

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