Air-cooled permanent magnet motor

Abstract

An air-cooled permanent magnet motor, comprising: a housing (3), two end covers (2), a stator (1) and a flow guide member (5), the housing (3) being arranged in a first direction, the two end covers (2) being spaced apart in the first direction and being fixed to the housing (3), and the stator (1) being arranged in the housing (3) and being spaced apart from the two end covers (2); and a rotor (4), provided inside the stator (1), an output shaft (41) of the rotor (4) passing through the end covers (2) in the first direction. The flow guide member (5) extends in the first direction, two ends of the flow guide member (5) in the first direction being respectively connected to the end covers (2) and the stator (1); the flow guide member (5) can extend and retract in the first direction, so as to sealingly connect the end covers (2) and the stator (1). The flow guide member (5) capable of extending and retracting in the first direction is provided between the end covers (2) and the stator (1), such that the flow guide member (5) can adapt to the spacing between the end covers (2) and the stator (1) and further the flow guide member (5) can sealingly connect the end covers (2) and the stator (1), thereby reducing the manufacturing and assembly difficulty, and improving the sealing effect on the stator (1) and the end covers (2).

Description

An air-cooled permanent magnet motor

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202323620258.5 and application date of December 28, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The utility model belongs to the technical field of motors, and more specifically, relates to an air-cooled permanent magnet motor. Background Art

[0004] To protect the stator ends, related motors first apply sealant to the stator ends, then press the connector onto the sealant to seal the stator ends. Because the sealant is formed by potting, it can easily cause thickness errors and surface unevenness. This can lead to overall dimensional errors between the connector and stator, complicating subsequent assembly; or, it can cause a loose seal between the connector and stator. Summary of the Invention

[0005] In view of this, the present invention provides an air-cooled permanent magnet motor to solve the technical problems of difficulty in assembling the motor and loose sealing of the stator end.

[0006] The technical solution of the present utility model is achieved as follows:

[0007] An embodiment of the present utility model provides an air-cooled permanent magnet motor, comprising: a housing, arranged along a first direction; two end covers, spaced apart in the first direction and fixed to the housing; a stator, arranged in the housing and spaced apart from the two end covers; a rotor, arranged inside the stator, and an output shaft of the rotor passes through the end covers along the first direction; a flow guide, extending along the first direction, with the two ends of the flow guide in the first direction respectively connected to the end covers and the stator; wherein the flow guide is retractable in the first direction to seal the end covers and the stator.

[0008] In some embodiments, the guide member is stepped, having a small diameter portion and a large diameter portion sequentially arranged in the first direction.

[0009] In some embodiments, one end of the small diameter portion is connected to the end cover, one end of the large diameter portion is connected to the stator, the small diameter portion and the large diameter portion are connected by a connecting portion, and an extending direction of the connecting portion is perpendicular to the first direction.

[0010] In some embodiments, a first airflow channel along the first direction is formed between the exterior of the stator and the housing; and the flow guide is connected to the outer edge of the stator to guide the airflow into the first airflow channel.

[0011] In some embodiments, the shell includes: a first shell, which is mounted on the outside of the guide member; an air inlet extending radially is formed inside the first shell, and the air inlet is connected to the first air flow channel; a second shell, the second shell and the first shell are abutted in the first direction and are mounted on the outside of the stator.

[0012] In some embodiments, the guide member is provided with a first lead opening, and the first shell is provided with a second lead opening; the air-cooled permanent magnet motor also includes: a copper busbar, which passes through the first lead opening, the air inlet and the second lead opening in sequence; and one end is electrically connected to the stator, and the other end is electrically connected to the junction box assembly on the outside of the second shell.

[0013] In some embodiments, a first seal is provided in the first lead-out, and the first seal is used to seal the gap between the copper busbar and the first lead-out; and / or a second seal is provided in the second lead-out, and the second seal is used to seal the gap between the copper busbar and the second lead-out.

[0014] In some embodiments, a first step surface is formed on the outer edge of the stator, and one end of the flow guide along the first direction abuts against the first step surface; a second step surface is formed on the inner side of the end cover, and the other end of the flow guide along the first direction abuts against the second step surface.

[0015] In some embodiments, a stator pressure ring is provided at the end of the stator in the first direction, and the stator pressure ring forms the outer edge of the stator; and a gasket is sandwiched between the end cover and the guide member.

[0016] In some embodiments, flanges are provided at both ends of the flow guide, wherein one of the flanges is connected to the stator using a first threaded fastener, and the other flange is connected to the end cover using a second threaded fastener.

[0017] The air-cooled permanent magnet motor of the present invention includes a housing, two end caps, a stator, and a flow guide. The housing is arranged along a first direction; the two end caps are spaced apart in the first direction and fixed to the housing; the stator is arranged within the housing and spaced apart from the two end caps; a rotor is arranged inside the stator, and the output shaft of the rotor extends through the end caps along the first direction; the flow guide extends along the first direction, and the ends of the flow guide in the first direction are respectively connected to the end caps and the stator; wherein the flow guide is retractable in the first direction to seal the end caps and the stator. The present invention provides a flow guide between the end caps and the stator, and the flow guide is configured to be retractable in the first direction, so that the flow guide can adapt to the spacing between the end caps and the stator, thereby enabling the flow guide to seal the end caps and the stator. In this way, even if there are manufacturing errors between the stator and the end caps, the overall dimensions of the stator, flow guide, and end caps can be kept unchanged, thereby facilitating subsequent assembly. Because the flow guide blocks the airflow outside the flow guide, the rotor is protected from debris in the airflow, or both the rotor and the stator are protected from debris in the airflow. Therefore, the embodiment of the present invention not only reduces the difficulty of manufacturing and assembling by providing a retractable flow guide, but also improves the sealing effect of the stator and the end cover, thereby better protecting the stator and / or rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a cross-sectional view of a related motor;

[0019] FIG2 is a cross-sectional view of an air-cooled permanent magnet motor according to an embodiment of the present invention;

[0020] FIG3 is a schematic structural diagram of a flow guide member according to an embodiment of the present invention;

[0021] FIG4 is an enlarged view of point A in FIG2 . DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The various specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0024] In the following description, the terms "first, second, ..." are used solely to distinguish different objects and do not imply any similarities or connections between the objects. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to directions during normal use. The directions "left" and "right" refer to the left-right directions shown in the corresponding schematic diagrams, which may or may not be the left-right directions during normal use.

[0025] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. "A plurality" means greater than or equal to two.

[0026] As shown in Figure 1, a connection base 7 is connected between the stator 1 and the end cover 2. This connection base 7 blocks airflow outside the connection base 7 to protect the rotor (i.e., protect the rotor from damage caused by debris in the airflow). The specific installation process involves first bolting the connection base 7 and the end cover 2 together into a single unit, which is then connected to the housing 3 and the seals on the end faces of the stator 1. This assembly method has the following disadvantages: first, the stator 1 is not protected; second, the multi-stop installation method makes it difficult to achieve assembly accuracy.

[0027] In order to solve the above-mentioned technical problems of related motors, the embodiment of the present invention provides an air-cooled permanent magnet motor. The air-cooled permanent magnet motor provided by the embodiment of the present invention is described in detail below.

[0028] As shown in Figure 2, the external structure of the air-cooled permanent magnet motor includes a housing 3 and two end caps 2. The housing 3 is arranged along a first direction, and the two end caps 2 are spaced apart in the first direction and fixed to the housing 3. The housing 3 and the two end caps 2 form a whole, thereby protecting the internal structure of the air-cooled permanent magnet motor. The first direction is indicated by the dotted line a in the figure.

[0029] As shown in Figure 2, the internal structure of the air-cooled permanent magnet motor includes a stator 1 and a rotor 4. The stator 1 is a cylindrical structure with a hollow interior and open ends along a first direction. The hollow cavity inside the stator 1 is used to accommodate the rotor 4. That is, the rotor 4 is disposed inside the stator 1. The output shafts 41 of the rotor 4 at both ends along the first direction extend out of the two openings of the stator 1. The output shaft 41 passes through the end cover 2 (that is, the output shaft 41 extends outside the end cover 2, and the outside of the end cover 2 can be understood as the side of the end cover 2 away from the stator 1). This allows the output shaft 41 to be connected to other mechanical devices, thereby transmitting the power of the output shaft 41 to other mechanical devices. When an alternating current is applied to the stator 1, it can generate a rotating magnetic field. The rotor 4 is provided with permanent magnets. Since like charges repel and opposite charges attract, the rotor 4 rotates with the rotation of the magnetic field generated by the stator 1. The number of phases of the alternating current connected to the stator 1 is not specifically limited in the embodiments of the present invention, for example, single-phase, two-phase, or three-phase alternating current.

[0030] As shown in Figure 2, the internal structure of the air-cooled permanent magnet motor also includes a flow guide 5, which extends along the first direction to form an internal hollow columnar structure. The internal hollow setting of the flow guide 5, on the one hand, facilitates the output shaft 41 of the rotor 4 to pass through the flow guide 5 and extend out of the end cover 2, and on the other hand, it can improve the elasticity of the flow guide 5 itself, reduce weight and reduce costs. The cross-section of the internal hollow flow guide 5 perpendicular to the first direction can be a circular ring or a ring of other shapes. The two ends of the flow guide 5 in the first direction are respectively connected to the end cover 2 and the stator 1; the connection between the flow guide 5 and the end cover 2, and the connection between the flow guide 5 and the stator 1, can be a detachable connection (such as using screws or bolts) or a fixed connection (such as welding).

[0031] As shown in Figure 2, the flow guide 5 is retractable in a first direction to seal the connection between the end cap 2 and the stator 1; that is, the flow guide 5 and the end cap 2 are sealed, as well as the flow guide 5 and the stator. This retractability can be understood as a slight amount of expansion and contraction in the first direction, meaning that the length to which the flow guide 5 can expand and contract is significantly less than its length along the first direction. This allows the flow guide 5 to adapt to the spacing between the end cap 2 and the stator 1, even if there are manufacturing and / or assembly errors between the stator 1 and the end cap 2. In Example 1, if the sealant on the end face of the stator 1 is too thick, the flow guide 5 can be shortened and connected between the end cap 2 and the stator 1. This allows the overall dimensions of the end cap 2, flow guide 5, and stator 1 to remain unchanged after they are joined. In Example 2, if the sealant on the end face of the stator 1 is too thin, the flow guide 5 can be extended and connected between the end cap 2 and the stator 1. This allows the overall dimensions of the end cap 2, flow guide 5, and stator 1 to remain unchanged after they are joined. After the end cap 2, flow guide 5, and stator 1 are connected as a single unit, their dimensions remain unchanged, which not only facilitates subsequent assembly, but also, because the flow guide 5 is sealed to the end cap 2, and to the stator 1, airflow outside the flow guide 5 is unlikely to enter the inside of the flow guide 5, thereby protecting the rotor 4 from debris in the airflow, and protecting the stator 1 and rotor 4 from debris in the airflow. The outside of the flow guide 5 is the side away from the internal hollow structure of the flow guide 5; the inside of the flow guide 5 is the side located within the internal hollow structure of the flow guide 5.

[0032] The air-cooled permanent magnet motor of the present invention includes a housing, two end caps, a stator, and a flow guide. The housing is arranged along a first direction; the two end caps are spaced apart in the first direction and fixed to the housing; the stator is arranged within the housing and spaced apart from the two end caps; a rotor is arranged inside the stator, and the output shaft of the rotor extends through the end caps along the first direction; the flow guide extends along the first direction, and the ends of the flow guide in the first direction are respectively connected to the end caps and the stator; wherein the flow guide is retractable in the first direction to seal the end caps and the stator. The present invention provides a flow guide between the end caps and the stator, and the flow guide is configured to be retractable in the first direction, so that the flow guide can adapt to the spacing between the end caps and the stator, thereby enabling the flow guide to seal the end caps and the stator. In this way, even if there are manufacturing errors between the stator and the end caps, the overall dimensions of the stator, flow guide, and end caps can be kept unchanged, thereby facilitating subsequent assembly. Because the flow guide blocks the airflow outside the flow guide, the rotor is protected from debris in the airflow, or both the rotor and the stator are protected from debris in the airflow. Therefore, the embodiment of the present invention not only reduces the difficulty of manufacturing and assembling by providing a retractable flow guide, but also improves the sealing effect of the stator and the end cover, thereby better protecting the stator and / or rotor.

[0033] In some embodiments, as shown in FIG. 2 and FIG. 3 , the flow guide 5 may be made of metal material for ease of manufacture; or may be made of non-metallic material, which has advantages such as light weight, corrosion resistance, and good insulation.

[0034] The guide member 5 can be linear or non-linear in the first direction. It is understood that, given the same thickness and material, a non-linear plate is more flexible than a linear plate, meaning it can be more flexible in the first direction. Therefore, to facilitate greater flexibility, the guide member 5 can be configured as a whole in a stepped, serrated, or V-shaped configuration.

[0035] In some embodiments, as shown in Figures 2 and 3, the flow guide 5 is stepped and has a small-diameter portion 51 and a large-diameter portion 52 arranged sequentially in a first direction. Each of the small-diameter portion 51 and the large-diameter portion 52 can be provided with only one or multiple portions. Alternatively, one small-diameter portion 51 and two large-diameter portions 52 can be provided, or one large-diameter portion 52 and two small-diameter portions 51 can be provided. For example, multiple large-diameter portions 52 and multiple small-diameter portions 51 are provided, and the small-diameter portions 51 and the large-diameter portions 52 are arranged alternately in sequence along the first direction.

[0036] The embodiment of the utility model forms a step-like shape by arranging the guide into a small-diameter portion and a large-diameter portion, which is simple to manufacture; and the step-like guide can be easily extended and retracted in the first direction to be sealed between the end cover and the stator.

[0037] In some embodiments, as shown in Figures 2 and 3 , one end of the small-diameter portion 51 is connected to the end cap 2 , and one end of the large-diameter portion 52 is connected to the stator 1 . The small-diameter portion 51 and the large-diameter portion 52 are connected by a connecting portion 53 , which extends perpendicular to the first direction. Thus, the small-diameter portion 51 , the connecting portion 53 , and the large-diameter portion 52 are sequentially connected to form a Z-shaped structure. This Z-shaped flow guide 5 can be easily formed using processes such as injection molding, sheet metal bending, or sheet metal welding.

[0038] In some embodiments, as shown in FIG3 , at least one of the small-diameter portion 51, the connecting portion 53, and the large-diameter portion 52 is provided with a thinned section. In Example 1, the thickness of the connecting portion 53 is less than that of the large-diameter portion 52, and the thickness of the connecting portion 53 is less than that of the small-diameter portion 51. In Example 2, the thickness of the end of the large-diameter portion 52 connected to the connecting portion 53 is less than the thickness of the end of the large-diameter portion 52 away from the connecting portion 53. In Example 3, the thickness of the end of the small-diameter portion 51 connected to the connecting portion 53 is less than the thickness of the end of the small-diameter portion 51 away from the connecting portion 53. The provision of the thinned section in this embodiment of the utility model increases the flexibility of the flow guide and enhances the flow guide's ability to compensate for dimensional errors.

[0039] In some embodiments, as shown in FIG2 , a first airflow channel 10 is formed along a first direction between the outside of the stator 1 and the housing 3; the outside of the stator 1 can be understood as the outer circular wall or outer peripheral wall of the stator 1. For example, in order to achieve circulation in the first airflow channel 10, an air inlet 101 can be opened at one end of the housing 3 close to one end cover 2, and an air outlet 102 can be opened at the other end cover. In this way, the gas introduced by the air inlet 101 flows through the first airflow channel 10 and then flows out from the air outlet 102; as the gas flows out, the heat of the stator 1 is taken away, reducing the risk of short circuit of the stator 1 due to high temperature.

[0040] As shown in FIG2 , the guide member 5 is connected to the outer edge of the stator 1 to guide the airflow into the first airflow channel 10 ; the outer edge of the stator 1 can be understood as the maximum outer diameter of the stator 1 . In this way, the air at the air inlet 101 can quickly enter the first airflow channel 10 .

[0041] The embodiment of the utility model connects the guide member to the outer edge of the stator so that the ends of the stator and the rotor are shielded by the guide member, thereby preventing debris in the airflow from passing through the end faces of the stator and the rotor and entering the interior of the stator and the rotor, thereby protecting the stator and the rotor at the same time.

[0042] In some embodiments, as shown in Figure 2 , the housing 3 includes a first housing 31 and a second housing 32. The first housing 31 is sleeved outside the air guide 5, limiting airflow to the outside of the air guide 5 and preventing it from entering the inside. The second housing 32 abuts the first housing 31 in the first direction and sleeves the stator. A radially extending air inlet 101 is formed within the first housing 31; the air inlet 101 communicates with the first airflow channel 10. This radial direction, indicated by the dashed line b in the figure, is perpendicular to the first direction.

[0043] As shown in FIG2 , the air inlet 101 and the air outlet 102 are at both ends of the first air flow channel 10. The first air flow channel 10 completely flows through the outside of the stator 1 in the first direction, thereby taking away more heat from the stator 1. At the same time, the first shell 31 is provided with an air inlet 101, and the air inlet 101 has a certain depth along the radial direction, so as to facilitate the connection between the air inlet 101 and the pipe for introducing gas. In example one, the pipe extends into the air inlet 101 and is threadedly connected to the first shell 31. In example two, the pipe can be connected to the end face of the first shell 31 radially away from the guide member 5 by a threaded fastener. By providing a guide member in the first shell, the embodiment of the utility model can conveniently introduce external air into the first air flow channel, which is convenient for operation.

[0044] In some embodiments, the air-cooled permanent magnet motor further includes a copper busbar 8. The copper busbar 8 is used to connect the stator 1 to an external power source so that the stator 1 can generate a rotating magnetic field. The guide member 5 is provided with a first lead-in opening 54, and the first shell 31 is provided with a second lead-in opening 311; the copper busbar 8 passes through the first lead-in opening 54, the air inlet 101, and the second lead-in opening 311 in sequence; and one end of the copper busbar 8 is electrically connected to the stator 1, and the other end of the copper busbar 8 is electrically connected to the junction box assembly 6 on the outside of the second shell. It can be understood that there is current flowing through the copper busbar 8, which easily generates heat. In the embodiment of the utility model, the heat of the copper busbar can be taken away by the cooling medium in the air inlet by passing the copper busbar through the air inlet.

[0045] In some embodiments, as shown in Figure 2, a first sealing member (not shown) is disposed within the first lead-in opening 54. This first sealing member is used to seal the gap between the copper busbar 8 and the first lead-in opening 54. This first sealing member can be a felt pad or adhesive. The first sealing member in this embodiment of the utility model not only seals the first lead-in opening, preventing airflow from passing through the first lead-in opening and contacting the stator and rotor, thereby protecting the stator and rotor, but also reduces friction between the copper busbar and the flow guide at the first lead-in opening, thereby protecting both the copper busbar and the flow guide.

[0046] In some embodiments, as shown in Figures 2 and 4 , a second sealing member (not shown) is provided within the second lead-in opening 311. This second sealing member is used to seal the gap between the copper busbar 8 and the second lead-in opening 311. This second sealing member can be a felt pad or adhesive. The provision of this second sealing member in embodiments of the present invention not only seals the second lead-in opening, preventing airflow from entering the junction box assembly through the second lead-in opening, thereby protecting the junction box assembly, but also reduces friction between the copper busbar and the flow guide at the second lead-in opening, thereby protecting both the copper busbar and the flow guide.

[0047] In some embodiments, as shown in FIG4 , a first step surface M1 is formed on the outer edge of the stator 1, and one end of the flow guide 5 along the first direction abuts against the first step surface M1. A second step surface M2 is formed on the inner side of the end cover 2, and the other end of the flow guide 5 along the first direction abuts against the second step surface M2. The embodiments of the present invention facilitate assembly by providing the first and second step surfaces; for example, when assembling the flow guide, the two ends of the flow guide can be placed against the first and second step surfaces, respectively, to position the flow guide, thereby facilitating subsequent fixed connection of the flow guide between the end cover and the stator.

[0048] In some embodiments, as shown in FIG4 , a stator pressure ring 11 is provided at the end of the stator 1 in the first direction, forming the outer edge of the stator; a gasket 21 is sandwiched between the end cover 2 and the flow guide 5. The provision of the stator pressure ring and gasket in the present embodiment increases the elasticity of the connection between the flow guide and the stator, as well as the elasticity of the connection between the flow guide and the end cover, thereby enabling the flow guide to be more effectively sealed between the end cover and the stator.

[0049] In some embodiments, as shown in Figures 3 and 4, flanges 9 are provided at both ends of the flow guide 5. One flange 9 is connected to the stator 1 using a first threaded fastener, and the other flange 9 is connected to the end cap 2 using a second threaded fastener. Specifically, the flange 9 can be welded to the outside of the end of the flow guide 5, which is convenient for operation and observation compared to welding the flange 9 to the inside of the end of the flow guide 5. The first and second threaded fasteners can specifically be screws, bolts, etc. By providing flanges at the ends of the flow guide, the embodiment of the utility model can use threaded fasteners to connect the flow guide between the stator and the end cap, making operation convenient.

[0050] In some embodiments, as shown in FIG3 , in order to increase the strength of the guide member 5 , a rib 55 may be welded on the inner side of the guide member 5 , or may be welded on the outer side of the guide member as shown in the figure.

[0051] The air-cooled permanent magnet motor provided by the utility model can be used alone or in combination with other devices. For example, the permanent magnet motor can be used in new energy vehicles, smart electric vehicles, drive motors, brake systems, electric fans, and other aspects.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An air-cooled permanent magnet motor, wherein, Comprising: A housing, arranged along a first direction; Two end caps, spaced apart in the first direction and fixed to the housing; A stator, arranged inside the housing and spaced apart from the two end caps; A rotor, arranged inside the stator, and an output shaft of the rotor penetrating the end cap along the first direction; A flow guide member, extending along the first direction, with two ends of the flow guide member in the first direction respectively connected to the end cap and the stator; Wherein, the flow guide member is telescopic in the first direction to sealingly connect the end cap and the stator.

2. The air-cooled permanent magnet motor according to claim 1, wherein, The flow guide member is stepped, having a small-diameter portion and a large-diameter portion arranged in sequence in the first direction.

3. The air-cooled permanent magnet motor according to claim 2, wherein, One end of the small-diameter portion is connected to the end cap, one end of the large-diameter portion is connected to the stator, the small-diameter portion and the large-diameter portion are connected by a connecting portion, and an extending direction of the connecting portion is perpendicular to the first direction.

4. The air-cooled permanent magnet motor according to claim 1, wherein, A first air flow channel along the first direction is formed between the outside of the stator and the housing; the flow guide member is connected to the outer edge of the stator to guide air flow into the first air flow channel.

5. The air-cooled permanent magnet motor according to claim 4, wherein, The housing includes: A first housing, sleeved outside the flow guide member; an air inlet extending radially is formed inside the first housing, and the air inlet is communicated with the first air flow channel; A second housing, the second housing abuts against the first housing in the first direction and is sleeved outside the stator.

6. The air-cooled permanent magnet motor according to claim 5, wherein, The flow guide member is provided with a first lead wire opening, and the first housing is provided with a second lead wire opening; the air-cooled permanent magnet motor further includes: A copper bar, sequentially passing through the first lead wire opening, the air inlet and the second lead wire opening; and one end is electrically connected to the stator, and the other end is electrically connected to a junction box assembly outside the second housing.

7. The air-cooled permanent magnet motor according to claim 6, wherein, A first seal is arranged in the first lead wire opening, and the first seal is used for sealing a gap between the copper bar and the first lead wire opening; and / or; a second seal is arranged in the second lead wire opening, and the second seal is used for sealing a gap between the copper bar and the second lead wire opening.

8. The air-cooled permanent magnet motor according to claim 4, wherein, A first stepped surface is formed on the outer edge of the stator, and one end of the flow guide member along the first direction abuts against the first stepped surface; a second stepped surface is formed on the inner side of the end cap, and the other end of the flow guide member along the first direction abuts against the second stepped surface.

9. The air-cooled permanent magnet motor according to claim 8, wherein, A stator retaining ring is arranged at an end of the stator in the first direction, and the stator retaining ring forms the outer edge of the stator; a gasket is clamped between the end cap and the flow guide member.

10. The air-cooled permanent magnet motor according to claim 4, wherein, Flanges are arranged at two ends of the flow guide member, and one of the flanges is connected to the stator by a first threaded fastener, and the connection between the other flange and the end cap uses a second threaded fastener.

Images