Stator assembly, compressor motor, and compressor

Abstract

The application relates to the technical field of motors and discloses a stator assembly, a compressor motor and a compressor. The stator assembly comprises: a stator core, the maximum width of a stator slot in a circumferential direction is c1, and the maximum radial thickness of a stator yoke of the stator core is b1; two insulating end plates, each of which is arranged at an axial end of the stator core; a terminal, which is arranged at the first insulating end plate and is configured as a n-layer structure arranged at intervals in a radial direction, the wall thickness of each layer structure is t, the terminal is formed with a terminal slot which is open to a side away from the stator core in an axial direction, the slot width of the terminal slot is e, the terminal has a terminal cavity, the width of each terminal cavity in the circumferential direction is c2 and the radial thickness is b2, the conductive cross-section diameter of a winding wire is d, and the following relationships are satisfied: b1-b2<=3mm, 3c2>=c1, 0.6<=ntsqrt(dd-ee) / (dd)<=1.5, and n>=2. Therefore, the current density and the wire breakage rate design requirements of the stator winding and the terminal connection fitting area can be considered, and automation production can be facilitated.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a stator assembly, a compressor motor, and a compressor. Background Technology

[0002] Currently, the electric motor is a crucial power unit in the compressor, and its efficiency directly affects the compressor's energy efficiency.

[0003] In related technologies, in order to improve the energy efficiency of motors, the method of increasing the slot fill factor is usually adopted to improve the motor. However, if the slot fill factor of the motor is too high, it will be difficult to insert the stator windings into the stator windings at the lead end for fixing, making it difficult to achieve automated production. It will also cause the gap at the stator windings to be too small, which will deteriorate the oil discharge of the compressor and affect the normal operation of the compressor. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a stator assembly in which the contact fit between the winding conductors and terminals in the stator winding is good, which can ensure the reliability of the conductor structure connection at the terminals, facilitate the fixing of the stator winding lead ends, and help to realize the automated production of the stator assembly.

[0005] Another objective of this application is to propose a compressor motor.

[0006] Another objective of this application is to propose a compressor.

[0007] A stator assembly according to a first aspect of this application includes: a stator core having stator slots, the stator slots having a maximum width of c1 in the circumferential direction and a maximum radial thickness of b1 in the stator yoke of the stator core, the stator slots being used to arrange stator windings; two insulating end plates, the insulating end plates being configured and respectively disposed at both axial ends of the stator core; and terminals, the terminals being disposed at the first insulating end plate of the two insulating end plates and arranged in an n-layer structure spaced apart in the radial direction, the wall thickness of each layer being t, the terminals being used for connecting and engaging winding conductors, lead wires, and conductors at the neutral point in the stator windings, the terminals forming terminal slots opening in the axial direction away from the stator core, the slot width of the terminal slots being e, the terminals having terminal cavities, each terminal cavity having a width of c2 in the circumferential direction and a radial thickness of b2, and satisfying the relationship: b1-b2≤3mm, 3 c2 ≥ c1; where the diameter of the conductive cross-section of the winding conductor is d, and satisfies the relationship: 0.6 ≤ n t sqrt(d de e) / (d d)≤1.5, n≥2.

[0008] According to the stator assembly of the present application embodiment, the lead-out end of the stator winding can be connected and cooperate with the terminal to solve the problem that the lead-out end of the stator winding is difficult to fix due to the high slot fill factor of the stator assembly. This helps to realize automated production. Furthermore, by designing the parameters of each component in the stator assembly (i.e., satisfying the above multiple relationships), the current density and open circuit rate design requirements of the connection and cooperation area between the stator winding and the terminal can be taken into account at the same time.

[0009] According to some embodiments of this application, the resistivity of the winding conductor is ρ, and satisfies the relationship: ρ ≥ 0.02 Ω × mm 2 / m.

[0010] According to some embodiments of this application, the slot width e of the terminal slot in the terminal and the conductive cross-sectional diameter d of the winding wire satisfy the relationship: 0.46≤e / d≤1.

[0011] According to some embodiments of this application, the terminal is disposed on the first insulating end plate, and the first insulating end plate includes: an outer peripheral wall, the outer peripheral wall being arranged in a ring, and the terminal being installed on the outer peripheral wall from the side away from the stator core in the axial direction; a plurality of inner side plate segments, the inner side plate segments being arranged at intervals with the outer peripheral wall in the radial direction, and the plurality of inner side plate segments being arranged in a circumferentially spaced order, the maximum height dimension of the inner side plate segments in the axial direction being h1; and a plurality of connecting segments, each of the connecting segments being connected between one of the inner side plate segments and the outer peripheral wall, and being adapted to avoid the stator winding, and the distance between the side of the connecting segment away from the stator core and the side of the terminal adjacent to the stator core being h2, and satisfying the relationship: 3mm≤h2-h1≤10mm.

[0012] According to some embodiments of this application, the first insulating end plate has ribs on the inner wall of the outer peripheral wall. The ribs are located on the side of the terminal adjacent to the stator core in the axial direction and extend in the axial direction. The end of the rib away from the stator core in the axial direction abuts against the bottom surface of the terminal.

[0013] According to some embodiments of this application, the bottom surface of the terminal is configured to gradually extend axially away from the side of the stator core from the inner wall of the outer peripheral wall.

[0014] According to some embodiments of this application, the maximum outer radius of the terminal is R1, the maximum outer radius of the stator core is R2, and the relationship is satisfied: R1-R2≥1.5mm.

[0015] According to some embodiments of this application, the stator winding is configured as a star connection structure, each terminal is configured to have two terminal cavities, and a first terminal group consisting of three terminals is provided on the first insulating end plate; in the first terminal group, the three lead-out sections of the lead wire are respectively pressed into one of the terminal cavities of the three terminals, and a wire for connecting and cooperating with the stator winding is respectively pressed into the other terminal cavity of the three terminals.

[0016] According to some embodiments of this application, the first insulating end plate is provided with a second terminal group consisting of three wires. In the second terminal group, the three wires at the neutral point are respectively pressed into the terminal cavity of one of the three terminals, and the other terminal cavity of the three terminals is connected and fitted by a wire; or, the three wires at the neutral point are connected and fitted and fitted with an insulating sleeve, and are fixed on the inner side of the outer peripheral wall of the first insulating end plate.

[0017] The compressor motor according to the second aspect of this application includes the stator assembly described above.

[0018] The advantages of the compressor motor compared to the prior art are the same as those of the stator assembly mentioned above, and will not be repeated here.

[0019] The compressor according to a third aspect of this application includes the compressor motor described above.

[0020] The advantages of the compressor compared to the prior art are the same as those of the compressor motor mentioned above, and will not be repeated here.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the compressor according to one embodiment of this application; Figure 2 This is a schematic diagram of a compressor motor according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a stator assembly according to an embodiment of this application. Figure 1 ; Figure 4 This is a schematic diagram of the structure of a stator assembly according to an embodiment of this application. Figure 2 ; Figure 5This is a schematic diagram illustrating the cooperation between the first insulating end plate and the terminal according to an embodiment of this application. Figure 1 ; Figure 6 This is a schematic diagram illustrating the cooperation between the first insulating end plate and the terminal according to an embodiment of this application. Figure 2 ; Figure 7 This is a schematic diagram of the structure of a terminal according to an embodiment of this application; Figure 8 This is a schematic diagram of the lead wire structure according to an embodiment of this application; Figure 9 The relation n is based on an embodiment of this application. t sqrt(d de e) / (d d) Relationship between breakage rate and current density; Figure 10 This is a graph showing the relationship between the operating conditions and the compressor oil output of an embodiment 1 and a comparative example according to this application.

[0023] Figure label: Compressor 1000; Compressor motor 100; main housing 200; pump body 300; liquid receiver 400; Stator assembly 10; Rotor 20; Rotor core 21; Magnet 22; Stator core 1; stator slot 11; stator yoke 12; Stator winding 2; First insulating end plate 31; outer peripheral wall 311; inner side plate segment 312; connecting segment 313; rib 314; second insulating end plate 32; Terminal 4; Terminal slot 401; Terminal cavity 402; First terminal group 41; Second terminal group 42 5. Insulating sleeve; 6. Lead wire; 61. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] The following is for reference. Figures 1-10The stator assembly 10 according to the embodiments of this application is described. The stator assembly 1010 can be applied to the compressor motor 100100, and the stator assembly 1010 can be used to establish a stable alternating magnetic field. The stator assembly 1010 is a stationary carrier for the interaction of electrical energy and magnetic field in the compressor motor 100100.

[0026] It should be noted that the motor is currently a crucial power unit in the compressor 1000, and its efficiency directly affects the compressor 1000's energy efficiency. In related technologies, improving motor efficiency typically involves increasing the slot fill factor. However, an excessively high slot fill factor makes it difficult to insert and fix the stator winding 2 at the lead-out end, hindering automated production. Furthermore, it results in insufficient clearance at the stator winding 2, deteriorating the compressor 1000's oil discharge and affecting its normal operation.

[0027] According to an embodiment of this application, the stator assembly 10 includes: a stator core 1, a stator winding 2, terminals 4, and an insulating end plate.

[0028] Reference Figure 2 As shown, the stator core 1 has a stator slot 11, and the stator slot 11 is used to arrange the stator winding 2. The maximum width of the stator slot 11 in the circumferential direction is c1, and the maximum radial thickness of the stator yoke 12 of the stator core 1 is b1.

[0029] Further integration Figure 3 and Figure 4 As shown, there are two insulating end plates, such as a first insulating end plate 31 and a second insulating end plate 32. The first insulating end plate 31 and the second insulating end plate 32 are respectively disposed at both ends of the axial direction of the stator core 1. The first insulating end plate 31 and the second insulating end plate 32 can at least be used to realize the electrical insulation, mechanical protection and structural limiting functions of the stator assembly 10 at the end.

[0030] The first insulating end plate 31 and the second insulating end plate 32 can be configured with the same structure, but the terminal 4 is only arranged on one of the first insulating end plate 31 and the second insulating end plate 32, so that the lead wire 6, neutral point and other components in the stator assembly 10 are arranged at one insulating end plate, which facilitates the arrangement of the wire harness structure in the stator assembly 10 and realizes the electrical connection between the components.

[0031] Combination Figure 5 , Figure 6 as well as Figure 7As shown, terminal 4 is disposed at the first insulating end plate 31, and terminal 4 is arranged in an n-layer structure with spacing along the radial direction, and the wall thickness of each layer is t. Terminal 4 can be used for connection and mating of winding wires, lead wires 6 and wires at the neutral point in stator winding 2. Terminal 4 forms a terminal slot 401 that opens away from the stator core 1 along the axial direction of stator assembly 10. The slot width of terminal slot 401 is e. Terminal 4 has a terminal cavity 402. Each terminal cavity 402 has a circumferential width of c2 and a radial thickness of b2, and satisfies the relationship: b1-b2≤3mm, 3 c2 ≥ c1.

[0032] It should be noted that when the above relationships b1-b2≤3mm and 3mm are simultaneously satisfied, When c2 ≥ c1, the space at the stator assembly 10 is limited, the safe distance between the terminal cavity 402 and the outer side is small, and the width of the terminal cavity 402 is large.

[0033] Combination Figure 2 , Figure 9 as well as Figure 10 As shown, the diameter of the conductive cross-section of the winding conductor is d, and it satisfies the relationship: 0.6 ≤ n t sqrt(d de e) / (d d)≤1.5, n≥2, so that terminal 4 is configured as at least a double-layer structure. The double-layer structure of terminal 4 can be placed on both the inner and outer radial sides of the insulating end plate to improve the reliability of the fit between terminal 4 and the insulating end plate. Wherein, the above relationship b1-b2≤3mm, 3 c2 ≥ c1 means that the relation 0.6 ≤ n is satisfied in the embodiments of this application. t sqrt(d de e) / (d d)≤1.5, n≥2 as a prerequisite.

[0034] In some embodiments of this application, terminal 4 can be configured as an IDC terminal. The IDC terminal is provided with a terminal slot 401. The terminal slot 401 can form an elastic deformation allowance in the IDC terminal, which can compensate for the wire diameter tolerance of the wire structure and the difference in the enamel film thickness of the enameled wire, and help improve the connection reliability of terminal 4.

[0035] It should be noted that, based on the above relation "n t sqrt(d de e) / (d d) reflects the ratio of the contact area between the winding conductor and terminal 4 in stator winding 2 to the area of ​​the winding conductor. By setting the parameters in the above formula, the ratio of the contact area between the winding conductor and terminal 4 to the area of ​​the winding conductor can be ensured, thereby controlling the current density and the breakage rate within the preferred range. Here, the "current density" and "breakage rate" refer to the current density and breakage rate at the contact area between the winding conductor and terminal 4.

[0036] Understandably, if the contact area between the winding conductor and terminal 4 is too small, the current density in the contact area will be too high, making the winding conductor prone to burnout; if the contact area between the winding conductor and terminal 4 is too large, the winding conductor will be prone to breakage (i.e., high breakage rate).

[0037] Reference Figure 9 As shown, with the above relation n t sqrt(d de e) / (d d) As the calculated value increases, the current density in the contact mating area decreases while the breakage rate increases. Therefore, based on the calculation results of the above relationship, the current density and breakage rate can be controlled within a certain range, so that the electrical connection mating at terminal 4 can take into account the design requirements of current density and breakage rate.

[0038] According to the stator assembly 10 of this application embodiment, the lead-out end of the stator winding 2 can be connected and cooperated with the terminal 4 to solve the problem that the lead-out end of the stator winding 2 is difficult to fix due to the high slot fill factor of the stator assembly 10. This helps to realize automated production. Furthermore, by designing the parameters of each component in the stator assembly 10 (i.e., satisfying the above-mentioned multiple relationships), the current density and breakage rate design requirements of the connection and cooperation area between the stator winding 2 and the terminal 4 can be taken into account at the same time.

[0039] In some embodiments of this application, the resistivity of the winding conductor is ρ, and satisfies the relationship: ρ ≥ 0.02 Ω × mm 2 / m. When the resistivity of the stator winding 2 satisfies the above relationship, the conductivity of the winding conductor is weaker than that of a pure copper conductor structure, such as copper-clad aluminum conductor, aluminum conductor, copper alloy conductor, etc. Compared with a pure copper conductor structure, it is cheaper and lighter.

[0040] In some embodiments of this application, the winding conductors in the stator winding 2 are configured as aluminum conductors. Aluminum conductors are made of metallic aluminum, which is cheaper than copper conductors. This reduces the cost of the stator winding 2 for the same length of wire. Furthermore, since aluminum has a density of 2.7 g / cm³ and copper has a density of 8.9 g / cm³, when the stator winding 2 is configured with the same resistance specifications, the weight of the aluminum conductor is only about half that of the copper conductor, which helps to reduce the overall weight and lower logistics costs.

[0041] Currently, aluminum wires have a higher resistivity than copper wires, which leads to increased winding losses in the compressor motor 100 and a significant reduction in energy efficiency. Furthermore, it is difficult to improve the slot fill factor of the existing compressor motor 100. Increasing the thickness or using higher grade silicon steel would lead to a significant increase in motor costs. Existing technologies cannot further improve motor energy efficiency without increasing costs.

[0042] In this application, by defining the various parameters of the terminal 4 and the stator winding 2 in the stator assembly 10, it is possible to optimize the design of aluminum wire motors with high slot fill factor (such as compressor motor 100 having the stator assembly 10 of this application embodiment), and it is helpful to realize the automated production of stator assembly 10 and compressor motor 100 having the stator assembly 10.

[0043] It should be noted that the stator assembly 10 according to the embodiments of this application is designed for the stator winding 2 configured with aluminum wires, enabling the electronic components to achieve a high slot fill factor while ensuring the reliability of the electrical connection between the stator winding 2 and the terminal 4. In other words, it can meet the design requirements of the compressor motor 100 to improve motor efficiency by increasing the slot fill factor, and can reduce the connection difficulty of the stator winding 2 lead-out ends, which helps to realize the automated production of the compressor motor 100.

[0044] In some embodiments of this application, the slot width e of the terminal slot 401 in terminal 4 and the conductive cross-sectional diameter d of the winding wire satisfy the relationship: 0.46 ≤ e / d ≤ 1. The ratio e / d can be specifically configured as 0.5, 0.7, 0.9, etc. When the above relationship is satisfied, the reliability of the connection between terminal 4 and the winding wire can be improved.

[0045] It is understandable that the above relationship (i.e., e / d) is used to reflect the compression ratio coefficient of the winding wire at terminal slot 401. If the compression ratio coefficient obtained based on the above relationship is too small (e.g., parameters less than 0.46 such as 0.2, 0.3, 0.4, etc.), the winding wire will be easily crushed and broken; if the compression ratio coefficient obtained based on the above relationship is too large (e.g., parameters greater than 1 such as 1.2, 2, 4, etc.), the winding wire will not be securely pressed at terminal 4 (i.e., it will easily loosen). Therefore, the reliability of the connection and fit of the winding wire at terminal 4 cannot be guaranteed.

[0046] It should be noted that "d" refers to the conductive cross-sectional diameter of the winding conductor, which is the diameter of the cross-section of the conductive structure (such as aluminum wire) in the winding conductor. The winding conductor is typically constructed as an insulated conductor structure, such as enameled round conductors (e.g., aluminum wires) or enameled flat conductors. The insulation layer can be configured with high-temperature resistant varnishes such as polyester, polyurethane, polyimide, or polyamide-imide; the material of the insulation layer is not limited here.

[0047] In this application, by designing the compression ratio coefficient of the winding wire at the terminal slot 401, the assembly reliability of the winding wire at the terminal slot 401 can be guaranteed, and the risk of the winding wire being crushed can be reduced while ensuring that the winding wire is assembled firmly and reliably.

[0048] Combination Figures 3-6 As shown, in some embodiments of this application, terminal 4 is disposed on first insulating end plate 31, and first insulating end plate 31 includes outer peripheral wall 311, multiple inner side plate segments 312 and multiple connecting segments 313.

[0049] Specifically, the outer peripheral wall 311 is arranged in a ring shape, so that the outer peripheral wall 311 can be arranged correspondingly to the stator core 1 in the axial direction, and the terminal 4 is installed on the outer peripheral wall 311 from the side away from the stator core 1 in the axial direction, so that the terminal 4 is arranged in a position suitable for avoiding the stator core 1, which facilitates the installation and fixing of the terminal 4 on the first insulating end plate 31.

[0050] Furthermore, the inner plate segments 312 and the outer peripheral wall 311 are arranged at intervals in the radial direction, and the multiple inner plate segments 312 are arranged in a circumferentially spaced sequence (i.e., the multiple inner plate segments 312 are arranged in a circumferentially spaced manner on the inner side of the outer peripheral wall 311). Each connecting segment 313 connects the inner wall surface of the outer peripheral wall 311 and an inner plate segment 312, so that the inner plate segments 312 can be connected and fixed to the outer peripheral wall 311 through the connecting segments 313. The arrangement position of the connecting segments 313 is adapted to avoid the stator winding 2 to prevent interference between the connecting segments 313 and the stator winding 2. It can be understood that the connecting segments 313 are configured to extend along the radial direction of the stator assembly 10 and are adapted to avoid the winding path of the stator winding 2.

[0051] The maximum axial height of the inner plate segment 312 is h1, and the distance between the side of the connecting segment 313 away from the stator core 1 and the side of the terminal 4 adjacent to the stator core 1 is h2, satisfying the relationship: 3mm ≤ h2 - h1 ≤ 10mm. This allows for sufficient space on the side of the connecting segment 313 away from the stator core 1 (which is also the side of the connecting segment 313 adjacent to the terminal 4) to ensure the reliability of the stator winding 2 and prevent interference between the stator winding 2 and the first insulating end plate 31 during winding. Simultaneously, it avoids affecting the oil discharge of the compressor 1000 due to excessively large differences (e.g., h2 - h1 values ​​of 12mm, 15mm, etc., parameters higher than 10mm).

[0052] Combination Figures 3-6 As shown, in some embodiments of this application, the first insulating end plate 31 has a rib 314 on the inner wall of the outer peripheral wall 311. The rib 314 is located on the side of the terminal 4 near the stator core 1 in the axial direction and extends in the axial direction. The end of the rib 314 away from the stator core 1 in the axial direction abuts against the bottom surface of the terminal 4. The rib 314 enhances the support strength of the terminal 4 at the first insulating end plate 31 and ensures the reliability of the fit between the terminal 4 and the first insulating end plate 31.

[0053] Combination Figure 5 and Figure 6 As shown, in the circumferential direction of the first insulating end plate 31, the ribs 314 and the inner plate segments 312 are arranged in an alternating manner, and each rib 314 is arranged in the axial direction corresponding to a terminal 4, so as to improve the local strength of the first insulating end plate 31 through the ribs 314, and improve the connection reliability of the terminal 4 at the first insulating end plate 31 through the ribs 314, avoid the terminal 4 from shaking relative to the first insulating end plate 31, and thus ensure the connection reliability of the wire structure at the terminal 4.

[0054] In some embodiments of this application, the bottom surface of terminal 4 is configured to gradually extend axially away from the inner wall of the outer peripheral wall 311 towards the side away from the stator core 1, so that the bottom surface of terminal 4 is inclined. Correspondingly, the end of the rib 314 may be formed with an abutment surface adapted to the shape of the bottom surface of terminal 4, so as to improve the reliability of the fit between the rib 314 and terminal 4.

[0055] Combination Figure 5 , Figure 6 as well as Figure 7 As shown, in a specific embodiment of this application, the terminal 4 is configured as a two-layer structure (i.e., n=2), with the two wall structures respectively disposed on the inner and outer sides of the outer peripheral wall 311 in the radial direction, so that the terminal 4 spans the end of the first insulating end plate 31.

[0056] The terminal 4 is equipped with a snap-fit ​​structure for engaging with the first insulating end plate 31. This snap-fit ​​structure allows the terminal 4 to be fixed to the first insulating end plate 31 via a simple and reliable assembly method. Furthermore, the ribs 314 on the first insulating end plate 31 engage with the terminal 4 to provide end support and positioning, further enhancing the assembly reliability of the terminal 4 at the first end plate.

[0057] It should be noted that the snap-fit ​​structure can be specifically configured as a snap-fit, and the snap-fit ​​structure can be set on at least one of the two wall structures.

[0058] Combination Figure 2 , Figure 5 as well as Figure 6 As shown in some embodiments of this application, the maximum outer radius of terminal 4 is R1, and the maximum outer radius of stator core 1 is R2, satisfying the relationship: R1-R2≥1.5mm. This ensures the electrical clearance and creepage distance between terminal 4 in stator assembly 10 and stator yoke 12 in stator core 1, thereby guaranteeing the electrical safety distance between terminal 4 and the outer main housing of stator assembly 10.

[0059] Combination Figures 3-6 As shown, in some embodiments of this application, the stator winding 2 is configured as a star connection structure, each terminal 4 is configured to have two terminal cavities 402, and the first insulating end plate 31 is provided with three first terminal groups 41 as a group.

[0060] In the first terminal group 41, the three lead segments of the lead wire 6 are respectively pressed into one of the terminal cavities 402 of the three terminals 4, and the other terminal cavity 402 of the three terminals 4 is respectively pressed into a wire for connecting and cooperating with the stator winding 2.

[0061] Specifically, the first terminal group 41 includes three terminals 4, and each terminal 4 has two terminal cavities 402. Each terminal cavity 402 can be connected to one lead segment of the lead wire 6, and a wire of phase connection from the stator winding 2 is connected to the other terminal cavity 402 of each terminal 4, thereby realizing the connection between the stator winding 2 and the lead wire 6. Thus, the connection between the lead wire 6 and the stator winding 2 is achieved through the three terminals 4 in the first terminal group 41. The connection method is simple and highly reliable, which helps to realize the automated production of the stator assembly 10.

[0062] Combination Figures 3-6As shown, in some embodiments of this application, the three terminals 4 in the first terminal group 41 are arranged at intervals along the circumferential direction of the first insulating end plate 31, and the outer peripheral wall 311 of the first insulating end plate 31 is provided with a hole structure for mating with the lead wire 6. Preferably, one terminal 4 and the other two terminals 4 in the first terminal group 41 are respectively arranged on both sides of the hole structure, so that the three terminals 4 in the first terminal group 41 can be arranged close to the hole structure, which can shorten the total distance between the lead wire 6 and the three terminals 4 in the first terminal group 41, and facilitate the connection and mating of the lead wire 6 and the three terminals 4 in the first terminal group 41.

[0063] Combination Figure 3 and Figure 5 As shown, in some embodiments of this application, a second terminal group 42 consisting of three terminals is provided on the first insulating end plate 31. In the second terminal group 42, the three wires at the neutral point are respectively pressed into one of the terminal cavities 402 of the three terminals 4, and the other terminal cavity 402 of the three terminals 4 is connected and engaged by a wire, so that the three wires at the neutral point can be electrically connected through the three terminals 4 in the second terminal group 42.

[0064] Specifically, the three conductors at the neutral point are configured as conductors of different phases in the stator winding 2, and are respectively press-fitted and fixed at the three terminals 4 (i.e., one terminal cavity 402 in each terminal 4) in the second terminal group 42, so as to realize the electrical connection between the conductor and the terminal 4. At the same time, the other terminal cavity 402 of the three terminals 4 in the second terminal group 42 can be connected in pairs by conductors (such as enameled wires, etc.), so that the connection between the three terminals 4 can be realized by at least two conductors.

[0065] In a further embodiment of this application, the three terminals 4 in the second terminal group 42 are arranged sequentially at intervals along the circumferential direction of the first insulating end plate 31, so that the arrangement of the three terminals 4 is relatively compact, which can shorten the total arrangement length of the conductor structure in the stator assembly 10, reduce the difficulty of pressing and fitting the three terminals 4 with the conductor structure, and help to realize the automated production of the stator assembly 10.

[0066] Combination Figure 4 and Figure 6 As shown, in some other embodiments of this application, the three conductors at the neutral point are connected and fitted together, and an insulating sleeve 5 is provided on the outside of the three conductors to achieve insulation protection at the three conductors through the insulating sleeve 5. Moreover, the insulating sleeve 5 is arranged and fixed on the inner side of the outer peripheral wall 311 of the first insulating end plate 31.

[0067] It is understandable that the three conductors at the neutral point are configured as the lead-out terminals of the three phases in the stator winding 2 and connected together. Moreover, insulation protection can be achieved through the insulating sleeve 5. Since the insulating sleeve 5 has a certain structural strength, it can be connected and cooperated with the insulating sleeve 5 through the connection structure (such as: buckle, etc.) at the first insulating end plate 31 to fix the insulating sleeve 5 at the first insulating end plate 31. This can ensure that the position of the neutral point in the stator assembly 10 is fixed, and the cooperation method is simple and highly reliable.

[0068] In some embodiments of this application, the first insulating end plate 31 has a pre-fixing position formed on the inner side of its outer peripheral wall 311. The pre-fixing position is used to arrange the aforementioned insulating sleeve 5. A connecting structure is provided at the pre-fixing position for connecting and engaging with the insulating sleeve 5, so as to constrain and fix the insulating sleeve 5 at the pre-fixing position through the connecting structure, thereby realizing the pre-installation of the insulating sleeve 5 on the first insulating end plate 31. Furthermore, the insulating sleeve 5 can be fixed by binding with an automatic binding machine.

[0069] Reference Figure 9 As shown, Figure 9 The above relation n t sqrt(d de e) / (d d) Relationship between breakage rate and current density.

[0070] The specific parameters are shown in the table below:

[0071] Reference Figure 10 As shown, Figure 10 The diagram illustrates a comparison of the energy efficiency of the compressor motor 100 of Embodiment 1 of this application with that of the prior art.

[0072] The specific parameters are shown in the table below:

[0073] The stator assembly 10 according to the embodiments of this application has at least the following advantages over the prior art: (1) By limiting the ratio range of the contact area between the winding wire and the terminal 4 in the stator winding 2 and the area of ​​the winding wire, the design requirements of current density and breakage rate in the connection and cooperation area between the stator winding 2 and the terminal 4 can be taken into account, which helps to realize automated production. (2) By limiting the range of the compression ratio coefficient of the winding wire in the stator winding 2 at the terminal 4, the problem of the winding wire being crushed or not being pressed firmly can be solved, the reliability of the fit between the stator winding 2 and the terminal 4 can be improved, and it is helpful to realize automated production. (3) By limiting the inner layer height of the first insulating end plate 31 and the arrangement position of the terminal 4 on the first insulating end plate 31 (i.e., the axial difference), the influence of the insulating end plate's own structure on the winding can be avoided, and the influence on the oil discharge of the compressor 1000 can be avoided.

[0074] According to an embodiment of this application, the compressor motor 100 includes the stator assembly 10 described above. The advantages of the compressor motor 100 compared to the prior art are the same as those of the stator assembly 10 described above, and will not be repeated here.

[0075] In a further embodiment of this application, the compressor motor 100 further includes a rotor 20, which is rotatably disposed within the stator assembly 10.

[0076] In some embodiments of this application, the rotor 20 includes a magnet 22 and a rotor core 21, with the magnet 22 disposed on the rotor core 21.

[0077] In some embodiments of this application, the rotor 20 is configured as a single type (i.e., the magnets 22 in the rotor 20 are configured as a single type), thereby simplifying the structure of the rotor 20 and helping to reduce the manufacturing difficulty and cost of the rotor 20. Simultaneously, the single-type rotor 20 has no included-angle magnetic bridge, enabling controllable leakage flux.

[0078] In some other embodiments of this application, the rotor 20 is configured as U-shaped (i.e., the magnet 22 in the rotor 20 is configured as U-shaped). The U-shaped magnet can reduce the high-order harmonics of the air gap magnetic flux density, making the air gap magnetic flux density waveform more sinusoidal, which helps to reduce iron loss.

[0079] In some other embodiments of this application, the rotor 20 is configured as a V-shape (i.e., the magnet 22 in the rotor 20 is configured as a V-shape). The V-shaped magnet can accommodate more magnets, thereby increasing the amount of magnets used, increasing the air gap magnetic flux density, and improving the motor energy efficiency.

[0080] It should be noted that the rotor 20 can be configured as one of the following: type I, type U, and type V.

[0081] Reference Figure 1 As shown, the compressor 1000 according to an embodiment of this application includes the compressor motor 100 described above.

[0082] like Figure 1As shown, the compressor 1000 has a main housing 200, a pump body 300, and a liquid receiver 400. The main housing 200 encloses a cavity, and the compressor motor 100 is integrated within the main housing 200 and partially connected to the pump body 300 located within the cavity to drive the pump body 300. Meanwhile, the liquid receiver 400 is located outside the main housing 200 and connected to the pump body 300; the liquid receiver 400 can be used to store the working fluid.

[0083] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0084] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0085] In the description of this application, "multiple" means two or more.

[0086] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0087] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that, include: The stator core has stator slots, the maximum width of the stator slots in the circumferential direction is c1, and the maximum radial thickness of the stator yoke of the stator core is b1. The stator slots are used to arrange stator windings. Insulating end plates, wherein two insulating end plates are configured and respectively disposed at both ends of the stator core; The terminal is located at the first insulating end plate of the two insulating end plates and is arranged in n layers at intervals along the radial direction, with each layer having a wall thickness of t. The terminal can be used for connecting and mating the winding conductors, leads, and conductors at the neutral point in the stator winding. The terminal forms a terminal slot that opens axially away from the stator core, with a slot width of e. The terminal has a terminal cavity, each of which has a circumferential width of c2 and a radial thickness of b2, satisfying the relationship: b1-b2≤3mm, 3 c2 ≥ c1; Wherein, the diameter of the conductive cross-section of the winding conductor is d, and it satisfies the following relationship: 0.6≤n t sqrt(d d-e e) / (d d)≤1.5,n≥2。 2. The stator assembly according to claim 1, characterized in that, The resistivity of the winding conductor is ρ, and it satisfies the following relationship: ρ ≥ 0.02 Ω × mm 2 / m; And / or, the winding conductors of the stator winding are configured as aluminum conductors.

3. The stator assembly according to claim 1, characterized in that, The slot width e of the terminal slot and the conductive cross-sectional diameter d of the winding wire satisfy the following relationship: 0.46≤e / d≤1.

4. The stator assembly according to claim 1, characterized in that, The terminal is disposed on the first insulating end plate, and the first insulating end plate includes: The outer peripheral wall is arranged in a ring shape, and the terminals are mounted on the outer peripheral wall from the side away from the stator core in the axial direction. Multiple inner side plate segments are arranged radially spaced from the outer peripheral wall, and the multiple inner side plate segments are arranged in a circumferentially spaced sequence. The maximum height dimension of the inner side plate segment in the axial direction is h1. The connection segment is a multi-segment connection segment, each segment is connected between an inner side plate segment and an outer peripheral wall, and is adapted to avoid the stator winding. The distance between the side of the connection segment away from the stator core and the side of the terminal adjacent to the stator core is h2, and satisfies the relationship: 3mm≤h2-h1≤10mm.

5. The stator assembly according to claim 4, characterized in that, The first insulating end plate has ribs on the inner wall of the outer peripheral wall. The ribs are located on the side of the terminal that is close to the stator core in the axial direction and extend in the axial direction. The end of the rib that is away from the stator core in the axial direction abuts against the bottom surface of the terminal.

6. The stator assembly according to claim 5, characterized in that, The bottom surface of the terminal is configured to gradually extend axially away from the stator core from the inner wall of the outer peripheral wall.

7. The stator assembly according to claim 1, characterized in that, The maximum outer radius of the terminal is R1, and the maximum outer radius of the stator core is R2, satisfying the relationship: R1-R2≥1.5mm.

8. The stator assembly according to any one of claims 1-7, characterized in that, The stator winding is configured in a star connection structure, each terminal is configured to have two terminal cavities, and a first terminal group of three is provided on the first insulating end plate; In the first terminal group, the three lead-out sections of the lead wire are respectively pressed into one of the terminal cavities of the three terminals, and a wire for connecting and cooperating with the stator winding is pressed into the other terminal cavity of the three terminals.

9. The stator assembly according to claim 8, characterized in that, The first insulating end plate is provided with a second terminal group consisting of three terminals. In the second terminal group, the three wires at the neutral point are respectively pressed into the terminal cavity of one of the three terminals, and the other terminal cavity of the three terminals is connected and matched by a wire. Alternatively, the three wires of the neutral point are connected and fitted with an insulating sleeve, and fixed on the inner side of the outer peripheral wall of the first insulating end plate.

10. A compressor motor, characterized in that, Includes the stator assembly according to any one of claims 1-9.

11. A compressor, characterized in that, Includes the compressor motor according to claim 10.

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