Motor stator, motor and compressor

Abstract

The invention discloses a motor stator, a motor and a compressor, and relates to the technical field of compressors, the motor stator comprises a stator core, a stator winding, an outgoing line assembly and a plurality of first terminals, the stator winding comprises a winding body, a winding joint and a transition section, the winding body is wound on stator teeth, and the winding joint is wound on the transition section. The transition section is arranged between the winding body and the winding joint; the outgoing line assembly is provided with a plurality of wire harness groups, and each wire harness group is provided with x conductive wires; each first terminal is crimped with at least one winding joint and one wire harness group; wherein the wire diameter of the transition section is d1, the wire diameter of the conductive wire is d2, and d1 is smaller than or equal to x1 / 2 * d2. According to the technical scheme, the relation among d1, d2 and x is adjusted, so that d1 is smaller than or equal to x1 / 2 * d2, the temperature rise of the conductor wire can be reduced, meanwhile, the safe distance between the outgoing line assembly and the peripheral wall of the stator iron core is guaranteed, the conductor wire with the large wire diameter can be adopted by the motor stator, and the difficulty of the manufacturing process of the outgoing line assembly is reduced.

Description

Technical Field

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

[0002] In compressors, the external leads of the motor windings are mostly made of multiple fine copper wires braided together. The manufacturing process of these leads is complex and costly, and the process of connecting them to the motor coils is also quite complicated. Summary of the Invention

[0003] The main objective of this invention is to provide a motor stator, motor, and compressor that reduces the difficulty of manufacturing the lead wire assembly.

[0004] To achieve the above objectives, the present invention provides a motor stator comprising:

[0005] The stator core includes a stator yoke and a plurality of stator teeth spaced apart inside the stator yoke;

[0006] A stator winding includes a winding body, a winding connector, and a transition section. The winding body is wound on the stator teeth, and the transition section is located between the winding body and the winding connector.

[0007] A lead wire assembly having multiple wire harness groups, each wire harness group having x conductive wires;

[0008] Multiple first terminals, each first terminal being crimped to at least one of the winding connectors and one of the wire harness groups;

[0009] Wherein, the diameter of the transition section is d1, the diameter of the conductive wire is d2, and d1≤x 1 / 2 ×d2.

[0010] In one embodiment, when each of the first terminals is crimped with one of the winding connectors and one of the wire harness groups, d1 / (x 1 / 2 )≤d2≤((3 1 / 2 )×d1) / (x 1 / 2 ).

[0011] In one embodiment, when each of the first terminals is crimped with two of the winding connectors and one of the wire harness groups, ((2) 1 / 2 )×d1) / (x 1 / 2 )≤d2≤(3×d1) / (x 1 / 2 ).

[0012] In one embodiment, at least one of the first terminals is crimped onto the winding connectors on two adjacent stator teeth.

[0013] In one embodiment, the motor stator further includes a plurality of second terminals, and the stator winding further includes a common terminal connector, which is located at the end of the winding body away from the winding connector, and the second terminals are crimped to the common terminal connector.

[0014] In one embodiment, the motor stator has m phases of stator windings, and each of the second terminals is crimped with y×m common terminal connectors, where y≥1.

[0015] In one embodiment, a mounting bracket is provided at one axial end of the stator core, the mounting bracket having a wire-passing hole for the winding connector to pass through, and the first terminal having at least one plate-like portion along the radial direction of the stator core, the plate-like portion being provided on the mounting bracket to press against the winding connector.

[0016] In one embodiment, the first terminal has one or two of the sheet-like portions.

[0017] In one embodiment, when the first terminal has two of the plate-shaped portions, the two plate-shaped portions are respectively disposed on opposite sides of the mounting bracket along the radial direction of the stator core.

[0018] The present invention also proposes an electric motor, including the aforementioned motor stator.

[0019] The present invention also proposes a compressor, including the aforementioned motor.

[0020] The technical solution of this invention adjusts the relationship between the wire diameter d1 of the transition section of the stator winding, the wire diameter d2 of the lead-out assembly, and the number of conductive wires x, so that d1, d2, and x satisfy: d1 ≤ x 1 / 2 ×d2, while reducing the temperature rise of the conductive wire, ensures a safe distance between the lead-in assembly and the outer peripheral wall of the stator core. This allows the motor stator to use larger diameter conductive wires and guarantees the reliability of the connection between the conductive wire and the stator winding. Compared to traditional lead-in wires braided from multiple thin copper wires, the manufacturing process of large-diameter conductive wires is simpler, thus reducing the manufacturing difficulty and cost of the lead-in assembly. Furthermore, the first terminal can directly crimp the large-diameter conductive wire and the stator winding, simplifying the connection process and enabling automated connection of the conductive wire and stator winding. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of an embodiment of the motor stator provided by the present invention;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0025] Figure 4 for Figure 1 Top view of the motor stator in the image;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of an embodiment of the lead wire assembly;

[0027] Figure 6 A schematic diagram of a structure of an embodiment of the first terminal having a sheet-like portion provided by the present invention;

[0028] Figure 7 A schematic diagram of an embodiment of the first terminal having two sheet-like portions provided by the present invention;

[0029] Figure 8 A diagram showing the temperature rise and safety distance variation of the conductive wires in an embodiment of the motor stator provided by the present invention;

[0030] Figure 9 A graph showing the temperature rise and safety distance variation of the conductive wires in another embodiment of the motor stator provided by the present invention.

[0031] Explanation of icon numbers:

[0032] 10. Motor stator; 100. Stator core; 200. Stator winding; 300. Lead wire assembly; 400. First terminal; 500. Second terminal; 600. Mounting bracket; 210. Winding body; 220. Winding connector; 230. Transition section; 240. Common terminal connector; 310. Wire harness assembly; 311. Conductive wire; 410. Sheet-shaped part.

[0033] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0037] This invention proposes a motor stator.

[0038] Please see Figures 1 to 5 In one embodiment of the present invention, the motor stator 10 includes a stator core 100, a stator winding 200, a lead wire assembly 300, and a plurality of first terminals 400. The stator core 100 includes a stator yoke and a plurality of stator teeth spaced apart inside the stator yoke. The stator winding 200 includes a winding body 210, a winding connector 220, and a transition section 230. The winding body 210 is wound on the stator teeth, and the transition section 230 is located between the winding body 210 and the winding connector 220. The lead wire assembly 300 has a plurality of wire harness groups 310, each wire harness group 310 having x conductive wires 311. Each first terminal 400 is crimped with at least one winding connector 220 and one wire harness group 310. The wire diameter of the transition section 230 is d1, the wire diameter of the conductive wires 311 is d2, and d1 ≤ x. 1 / 2 ×d2.

[0039] Specifically, the motor stator 10 includes a stator core 100 and a stator winding 200, and the motor stator 10 is used to generate a rotating magnetic field. The stator core 100 is made of laminated silicon steel plates. The stator core 100 includes a stator yoke and stator teeth. The stator yoke is annular, and multiple stator teeth are spaced circumferentially along the inner side of the stator yoke. Stator slots are defined between adjacent stator teeth, and the number of stator slots is the same as the number of stator teeth. The stator winding 200 includes a winding body 210, a winding connector 220, and a transition section 230. The winding body 210 passes through the stator slots and is directly wound on the stator teeth. The winding connector 220 is used to connect to the lead wire assembly 300 for electrical connection to an external circuit. The motor stator 10 is used to be sleeved on the outer periphery of the motor rotor. When three-phase alternating current is applied to the stator winding 200, a rotating magnetic field is generated. The permanent magnet on the motor rotor interacts with the rotating magnetic field to generate torque, thereby driving the motor to rotate and realize the normal operation of the motor.

[0040] When the winding body 210 is wound around the stator teeth, it will undergo some deformation, resulting in a certain change in its wire diameter. The transition section 230, which serves as the connection between the winding body 210 and the winding connector 220, is neither wound around the stator teeth nor connected to the first terminal 400. The transition section 230 does not deform, or only undergoes slight deformation. The wire diameter of the transition section 230 is d1, which can be measured using calipers or a micrometer. The portion of the transition section 230 without insulation can be measured directly; for the transition section 230 with insulation, a small section of insulation can be removed first to measure the diameter of the bare copper wire. Specifically, a small section of the insulation layer can be gently sanded off with fine sandpaper, or a specialized wire stripping tool can be used to carefully remove the insulation layer without damaging the copper wire; the measuring face of a vernier caliper or micrometer should be placed firmly against the exposed copper wire; the adjustment knob should be slowly rotated until the measuring face contacts the wire without any gap; the reading on the caliper or micrometer should be read and recorded; several different locations on the same transition section 230 should be selected for measurement, and multiple data points should be recorded to reduce measurement errors and ensure the accuracy of the results; the average value should be calculated to obtain the wire diameter d1 of the transition section 230. Where 0.5mm ≤ d1 ≤ 1mm.

[0041] The lead-out assembly 300 has multiple wire harness groups 310, with each first terminal 400 crimped to one wire harness group 310. The wire harness groups 310 are used to connect the stator winding 200 to an external circuit or control system. Each wire harness group 310 has x conductive wires 311, where x is a positive integer of 1 or higher. Each conductive wire 311 has the same diameter, d2, which can be measured using calipers or a micrometer. The portion of the conductive wire 311 without insulation can be measured directly; for conductive wires 311 with insulation, a small section of insulation can be removed to measure the diameter of the bare copper wire, thus obtaining the diameter d2 of the conductive wire 311. The specific measurement method is the same as that for the transition section 230 and will not be repeated here. Where 0.6mm ≤ d2 ≤ 1.5mm.

[0042] The diameter of the conductive wire 311 is directly related to its temperature rise. The diameter of the conductive wire 311 determines its resistance value, which in turn directly affects the heat generated when current flows through it, i.e., Joule heating. Specifically, according to the law of resistance, the resistance of a conductor is directly proportional to its length and inversely proportional to its cross-sectional area (i.e., wire diameter). Therefore, the larger the diameter of the conductive wire 311, the lower its resistance. When current flows through a conductor, heat is generated due to the conductor's resistance. According to Joule's law, the heating power is directly proportional to the square of the current and the resistance. If the current is constant, the greater the resistance of the conductive wire 311, the more heat is generated, leading to a temperature rise. Therefore, a larger diameter of the conductive wire 311, due to its lower resistance, can reduce the temperature rise caused by the current. A larger diameter of the conductive wire 311 not only reduces resistance but also increases the heat dissipation area, helping to improve heat dissipation efficiency and further control the temperature rise. Therefore, to ensure that the motor is not damaged by overheating under normal operating conditions, selecting a suitable diameter for the conductive wire 311 is crucial for controlling the motor's temperature rise.

[0043] The diameter of the conductive wire 311 affects the safe distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100. The stator core 100 is made of laminated silicon steel sheets; if the conductive wire 311 comes into contact with the stator core 100, a short circuit may occur. Therefore, a sufficient distance must be maintained between the conductive wire 311 and the outer peripheral wall of the stator core 100 to prevent electrical short circuits. Furthermore, arcing or corona discharge is more likely to occur at high voltages; the higher the operating voltage of the motor, the greater the required electrical safety distance. The distance between the conductive wire 311 and the outer peripheral wall of the stator core 100 can be measured using measuring tools such as calipers or a ruler. Specifically, determining the shortest straight-line distance from the lead-out assembly 300 to the outer peripheral wall of the stator core 100 is typically the distance from the nearest point of the lead-out assembly 300 to the nearest point of the outer peripheral wall of the stator core 100. Place one measuring facet of the vernier caliper against the lead wire assembly 300, and the other measuring facet against the outer edge of the stator core 100 end face. Slowly rotate the adjustment knob until both measuring faces are in close contact with the conductive wire 311 and the outer edge of the stator core 100 end face. Read the value on the caliper and record it. Repeat the above steps at several selected key points to ensure the accuracy and comprehensiveness of the measurement. Record the data at each measuring point and calculate the average value to obtain the safe distance D from the lead wire assembly 300 to the outer peripheral wall of the stator core 100.

[0044] The outer peripheral wall of the stator core 100 refers to the maximum outer circular contour of the stator core 100, which is the maximum distance from the center of the stator core 100 to its outer edge contour. If the outer peripheral edge of the stator core 100 is a complete circle, it can be measured directly; if the outer peripheral edge of the stator core 100 is a non-complete circle with grooves, after determining the circle at three points at the outermost end of the arc, the distance between the lead-out assembly 300 and the circle is measured as the safe distance D from the lead-out assembly 300 to the outer peripheral wall of the stator core 100.

[0045] According to experimental results, by adjusting the relationship between the wire diameter d1 of the transition section 230 of the stator winding 200, the wire diameter d2 of the conductive wire 311 of the lead wire assembly 300, and the number x of the conductive wires 311, d1, d2, and x can be made to satisfy: d1 ≤ x 1 / 2×d2, while reducing the temperature rise of the conductive wire 311, ensures a safe distance between the lead wire assembly 300 and the outer peripheral wall of the stator core 100. This allows the motor stator 10 to use a larger diameter conductive wire 311 and guarantees the reliability of the connection between the conductive wire 311 and the stator winding 200. Compared to traditional lead wires braided from multiple thin copper wires, the manufacturing process of the large-diameter conductive wire 311 is simpler, thus reducing the manufacturing difficulty and cost of the lead wire assembly 300. Simultaneously, the first terminal 400 can directly crimp the large-diameter conductive wire 311 and the stator winding 200, simplifying the connection process and enabling automated connection of the conductive wire 311 and the stator winding 200.

[0046] Understandably, when the diameter of the conductive wire 311 remains constant, the more conductive wires 311 there are, the larger the cross-sectional area of ​​the wire harness 310 and the lead-out assembly 300, and the smaller the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100. Conversely, when the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 remains constant, the more conductive wires 311 there are, the smaller the diameter of the conductive wires 311. Therefore, the number of conductive wires 311 can also affect the temperature rise of the conductive wires 311 and the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100.

[0047] If the stator winding 200 has a larger wire diameter (i.e., carries a larger current), the conductor wire 311 also needs to have a correspondingly larger wire diameter to ensure that the current can be transferred from the stator winding 200 to the external circuit without loss. A larger wire diameter in the stator winding 200 means lower resistance and less heat generation, so the conductor wire 311 also needs to have a sufficient cross-sectional area to reduce resistance and lower temperature rise. A larger wire diameter in the stator winding 200 requires a more robust conductor wire 311 to ensure reliable connection, and the conductor wire 311 needs sufficient mechanical strength to withstand the tensile force and other mechanical stresses at the connection. Therefore, the wire diameter of the stator winding 200 can affect the temperature rise of the conductor wire 311 and the safe distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 by influencing the wire diameter of the conductor wire 311.

[0048] d1≤x 1 / 2 ×d2, that is, d2≥d1 / (x 1 / 2 Please refer to Table 1 and... Figure 8 In one embodiment, as d1 / (x 1 / 2 As d2 increases, the temperature rise of conductor 311 first decreases rapidly, then decreases slowly, and finally remains stable within a certain range. When d2 ≥ d1 / (x 1 / 2When the temperature rise of the conductive wire 311 is below 65℃, the temperature rise of the conductive wire 311 is effectively controlled.

[0049] With d1 / (x 1 / 2 As the diameter of the conductor 311 increases, the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 initially remains stable within a certain range, then decreases rapidly. That is, when the diameter of the conductor 311 is small, there is a large safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100; as the diameter of the conductor 311 increases, the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 decreases accordingly. When d2=d1 / (x 1 / 2 When x is a positive integer greater than or equal to 1, then d2≤d1, and the safe distance between the lead wire assembly 300 and the outer peripheral wall of the stator core 100 is at least 4.5mm.

[0050] Therefore, when d2≥d1 / (x) 1 / 2 When the temperature rise of the conductive wire 311 is reduced, a safe distance between the lead wire assembly 300 and the outer peripheral wall of the stator core 100 is maintained. This allows the motor stator 10 to use a conductive wire 311 with a larger diameter, thereby reducing the difficulty and cost of manufacturing the lead wire assembly 300.

[0051] In one embodiment, please refer to Table 1 and [reference needed]. Figure 8 When each first terminal 400 is crimped with a winding connector 220 and a wire harness group 310, d1 / (x 1 / 2 )≤d2≤((3 1 / 2 )×d1) / (x 1 / 2 ).

[0052] d1 / (x 1 / 2 )≤d2≤((3 1 / 2 )×d1) / (x 1 / 2 That is, d1≤d2 / (x) 1 / 2 )≤(3 1 / 2 )×

[0053] d1. When d2 / (x 1 / 2 When d1 < d2, although the safety distance between the lead wire assembly 300 and the outer peripheral wall of the stator core 100 is relatively large, basically maintained at 4.5mm, the temperature rise of the conductor 311 exceeds 65℃, and even reaches d2 / (x) when d1 < d2. 1 / 2 When d² / (x) = 0.5d₁, the temperature rise of conductor 311 reaches 80℃. 1 / 2 )>(3 1 / 2When d1 ≤ d2 / (x) × d1, the temperature rise of the conductor 311 is relatively low and remains relatively stable at 60℃. However, the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 is low, falling below the safety distance qualification threshold of 4mm, and the rate of decrease in the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 is also significant. Therefore, when d1 ≤ d2 / (x) × d1, the temperature rise of the conductor 311 is relatively low and remains relatively stable at 60℃. 1 / 2 )≤3 1 / 2 When the temperature rise of the conductor 311 is maintained at 60°C to 65°C, the safe distance between the lead wire assembly 300 and the outer peripheral wall of the stator core 100 is maintained at 4mm to 4.5mm, which is higher than the qualified critical point of the safe distance.

[0054] Table 1: Temperature Rise and Safety Distance of Conductor Wires

[0055] <![CDATA[d2 / (x 1 / 2 )]]> <![CDATA[0.5d1]]> <![CDATA[d1]]> <![CDATA[(3 1 / 2 )×d1]]> <![CDATA[(5 1 / 2 )×d1]]> Temperature rise of conductive wire 80 65 60 60 safe distance 4.5 4.5 4 2

[0056] In another embodiment, please refer to Table 2 and [reference needed]. Figure 9 When each first terminal 400 is crimped with two winding connectors 220 and one wire harness group 310, ((2 1 / 2 )×d1) / (x 1 / 2 )≤d2≤(3×d1) / (x 1 / 2 ).

[0057] ((2 1 / 2 )×d1) / (x 1 / 2 )≤d2≤(3×d1) / (x 1 / 2 That is (2) 1 / 2 )×d1≤d2 / (x 1 / 2 )≤3×d1. When d2 / (x 1 / 2 ) < (2 1 / 2 At d1, although the safe distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 is relatively large, maintaining 4.5mm, the temperature rise of the conductive wire 311 exceeds 60℃, even at d2 / (x 1 / 2 When d2 / (x) = d1, the temperature rise of conductor 311 reaches 85℃. 1 / 2 When (2) > 3 × d1, the temperature rise of the conductor 311 is relatively low and remains relatively stable at or below 58℃. However, the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 is low, below the safety distance qualification threshold of 3.5 mm, and the rate of decrease in the safety distance between the lead-out assembly 300 and the outer peripheral wall of the stator core 100 is also significant. Therefore, when (2) 1 / 2 )×d1≤d2 / (x 1 / 2When )≤3×d1, the temperature rise of the conductor 311 is maintained between 58℃ and 60℃. At the same time, the safe distance between the lead wire assembly 300 and the outer peripheral wall of the stator core 100 is maintained between 3.5mm and 4.5mm, which is higher than the qualified critical point of the safe distance.

[0058] Table 2: Temperature Rise and Safety Distance of Conductor Wires

[0059]

[0060] In one embodiment, at least one first terminal 400 is crimped onto the winding connector 220 on two adjacent stator teeth.

[0061] When the first terminal 400 crimps the two winding connectors 220, the two winding connectors 220 are the winding connectors 220 on two adjacent stator teeth. This reduces unnecessary wiring complexity, simplifies the internal wiring of the motor, ensures the correct current path of the stator winding 200 during operation, and allows current to flow correctly into and out of the stator winding 200, thereby improving the reliability and stability of the motor and ultimately enhancing its overall performance. It also simplifies the manufacturing and maintenance process of the motor stator 10.

[0062] In one implementation, please refer to Figure 1 and Figure 3 The motor stator 10 also includes multiple second terminals 500, and the stator winding 200 also includes a common terminal connector 240. The common terminal connector 240 is located at the end of the winding body 210 away from the winding connector 220, and the second terminals 500 are crimped to the common terminal connector 240.

[0063] The winding body 210 has a winding connector 220 and a common terminal connector 240 at both ends. The winding connector 220 is connected to the conductive wire 311 through the first terminal 400, thereby connecting to an external circuit or control system. The common terminal connector 240 of one phase of the stator winding 200 is connected to the common terminal connector 240 of the stator winding 200 of other phases through the second terminal 500. For example, a three-phase motor adopts a star connection, with the winding connector 220 of phase A connected to the first terminal 400, the winding connector 220 of phase B connected to another first terminal 400, and the winding connector 220 of phase C connected to yet another first terminal 400. The common terminal connectors 240 of phase A, phase B, and phase C converge at the other end of the winding body 210 through the second terminal 500. The common terminal 240 of multiple phase stator windings 200 is connected through the second terminal 500, which simplifies the internal wiring of the motor stator 10 and makes the manufacturing and maintenance of the motor stator 10 easier. Moreover, this connection method has high flexibility, and the motor can adjust the connection method according to actual needs, such as easily changing from a star connection to a delta connection, and vice versa.

[0064] In one implementation, please refer to Figure 3 The motor stator 10 has an m-phase stator winding 200, and each second terminal 500 is crimped with y×m common terminal connectors 240, where y≥1.

[0065] The motor stator 10 has m-phase stator windings 200, with common phase numbers including single-phase (m=1) and three-phase (m=3). y×m represents the number of common terminals 240 crimped to the second terminal 500. For example, in a three-phase motor (m=3), when y=1, each second terminal 500 connects to 3 common terminals 240; when y=2, each second terminal 500 connects to 6 common terminals 240. In a star connection, the common terminals 240 of the three-phase windings converge at one point (neutral point) and are connected via the second terminal 500.

[0066] In one implementation, please refer to Figure 1 , Figure 5 and Figure 6 A mounting bracket 600 is provided at one axial end of the stator core 100. The mounting bracket 600 has a wire hole for the winding connector 220 to pass through. The first terminal 400 has at least one sheet-like portion 410 along the radial direction of the stator core 100. The sheet-like portion 410 is provided on the mounting bracket 600 to press the winding connector 220.

[0067] The mounting bracket 600 is installed at one axial end of the stator core 100 to fix and support the winding connector 220. After the winding connector 220 extends from the winding body 210, it passes through a wire hole on the mounting bracket 600. The sheet-like portion 410 is fixed to the mounting bracket 600 to ensure its stable position, and the winding connector 220 is fixed to the first terminal 400 by physical crimping. The sheet-like portion 410 is arranged radially along the stator core 100, which allows for better crimping of the winding connector 220, ensuring a reliable connection between the winding connector 220 and the first terminal 400.

[0068] In one implementation, please refer to Figure 6 The first terminal 400 has a sheet-like portion 410.

[0069] A single sheet portion 410 can be used when the current is small or the number of winding connectors 220 is limited. For example, a single sheet portion 410 can be used to connect a single winding connector 220, which not only simplifies the structure and facilitates installation, but also simplifies the design and manufacturing of the first terminal 400 and reduces costs. When the first terminal 400 has a sheet portion 410, the sheet portion 410 can be located either inside or outside the mounting bracket 600.

[0070] In another implementation, please refer to Figure 7The first terminal 400 has two sheet-like portions 410.

[0071] The two sheet-like portions 410 can be used in situations where the current is high or double the connection strength is required. The two sheet-like portions 410 can provide better crimping force, ensuring the reliability of the connection under high current or vibration environments, and ensuring that the winding connector 220 and the conductor 311 maintain a stable connection during long-term operation.

[0072] In one implementation, please refer to Figure 1 and Figure 7 When the first terminal 400 has two sheet-like portions 410, the two sheet-like portions 410 are respectively disposed on opposite sides of the mounting bracket 600 along the radial direction of the stator core 100.

[0073] Two sheet-like portions 410 are arranged opposite each other, with one located inside the mounting bracket 600 and the other outside, to provide stronger crimping force and double protection, ensuring a more secure and stable connection between the winding connector 220, the conductive wire 311, and the first terminal 400. By arranging the sheet-like portions 410 on opposite sides of the mounting bracket 600 along the radial direction of the stator core 100, crimping stress can be dispersed, avoiding stress concentration at a single point.

[0074] The present invention also proposes an electric motor, which includes a motor stator 10. The specific structure of the motor stator 10 is as described in the above embodiments. Since the present motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0075] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor is as described in the above embodiments. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0076] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A motor stator, characterized in that, include: The stator core includes a stator yoke and a plurality of stator teeth spaced apart inside the stator yoke; A stator winding includes a winding body, a winding connector, and a transition section. The winding body is wound on the stator teeth, and the transition section is located between the winding body and the winding connector. A lead wire assembly having multiple wire harness groups, each wire harness group having x conductive wires; Multiple first terminals, each first terminal being crimped to at least one of the winding connectors and one of the wire harness groups; Wherein, the diameter of the transition section is d1, the diameter of the conductive wire is d2, and d1≤x 1 / 2 ×d2.

2. The motor stator as described in claim 1, characterized in that, When each of the first terminals is crimped with one of the winding connectors and one of the wire harness groups, d1 / (x 1 / 2 )≤d2≤((3 1 / 2 )×d1) / (x 1 / 2 ).

3. The motor stator as described in claim 1, characterized in that, When each of the first terminals is crimped with two of the winding connectors and one of the wire harness groups, ((2) 1 / 2 )×d1) / (x 1 / 2 )≤d2≤(3×d1) / (x 1 / 2 ).

4. The motor stator as described in claim 3, characterized in that, At least one of the first terminals is crimped onto the winding connectors on two adjacent stator teeth.

5. The motor stator as described in claim 1, characterized in that, The motor stator also includes a plurality of second terminals, and the stator winding also includes a common terminal connector, which is located at the end of the winding body away from the winding connector, and the second terminal is crimped to the common terminal connector.

6. The motor stator as described in claim 5, characterized in that, The motor stator has m phases of stator windings, and each of the second terminals is crimped with y×m common terminal connectors, where y≥1.

7. The stator according to any one of claims 1 to 6, characterized in that, A mounting bracket is provided at one axial end of the stator core. The mounting bracket has a wire-passing hole for the winding connector to pass through. The first terminal has at least one plate-like portion along the radial direction of the stator core. The plate-like portion is provided on the mounting bracket to press the winding connector.

8. The motor stator as described in claim 7, characterized in that, The first terminal has one or two of the said sheet-like portions.

9. The motor stator as described in claim 8, characterized in that, When the first terminal has two plate-shaped portions, the two plate-shaped portions are respectively disposed on opposite sides of the mounting bracket along the radial direction of the stator core.

10. An electric motor, characterized in that, Includes the motor stator as described in any one of claims 1 to 9.

11. A compressor, characterized in that, Including the motor as described in any one of claims 10.

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