motors and compressors

Abstract

This invention discloses an electric motor and a compressor. The electric motor includes: a stator core with electromagnetic wire wound around it to form a multiphase winding; and a terminal assembly including a terminal socket and a terminal. The terminal socket is fixed to the stator core, and the terminal socket has a cavity containing a portion of the electromagnetic wire. In a first direction, the upper end of the cavity has an insertion port, and the terminal has a wire groove. The lower end of the terminal is inserted into the cavity through the insertion port, and the terminal is electrically connected to the electromagnetic wire located in the wire groove. The diameter of the electromagnetic wire is δ, the length between the lower end face of the terminal and the upper end of the straight segment of the wire groove is M, and the width of the wire groove is ε. The motor satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8. The motor of the present invention can ensure that the terminal can fully penetrate the electromagnetic wire and that the terminal can always clamp the electromagnetic wire, thereby keeping the terminal contact resistance within a reasonable range and improving the reliability of the terminal during use.

Description

Technical Field

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

[0002] In related technologies, DC inverter compressors use piercing terminals. If the terminals do not pierce the electromagnetic wire sufficiently or not at all, the terminals will not make sufficient or no contact with the electromagnetic wire, which will lead to increased contact resistance of the terminals. This means that the terminals generate more heat when working, making them prone to failure. In other words, the terminals have low reliability during use, which will eventually lead to the motor burning out. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a motor that can ensure that the terminal can fully penetrate the electromagnetic wire and that the terminal can always clamp the electromagnetic wire, thereby keeping the terminal contact resistance within a reasonable range and improving the reliability of the terminal during use.

[0004] An electric motor according to an embodiment of the present invention includes: a stator core on which electromagnetic wire is wound to form a multiphase winding; a terminal assembly including a terminal socket and a terminal, the terminal socket being fixed to the stator core, the terminal socket having a cavity therein, a portion of the electromagnetic wire being disposed within the cavity, an insertion port being provided at the upper end of the cavity in a first direction, the terminal having a wire groove, the lower end of the terminal being inserted into the cavity through the insertion port, and the terminal being electrically connected to the electromagnetic wire located in the wire groove; wherein the diameter of the electromagnetic wire is δ, the length between the lower end face of the terminal and the upper end of the straight segment of the wire groove is M, the width of the wire groove is ε, and wherein the motor satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8.

[0005] According to an embodiment of the present invention, the lower end of the terminal of the motor can be inserted into the cavity of the terminal socket through the insertion port, so that the terminal is electrically connected to the electromagnetic wire, and the motor satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8 ensures that the terminal meets the corresponding crimping height during assembly and that the mutual stress between the terminal and the electromagnetic wire is in the optimal state. This ensures that the terminal can fully pierce the electromagnetic wire and that the terminal can always clamp the electromagnetic wire, thereby keeping the terminal contact resistance within a reasonable range and improving the reliability of the terminal during use.

[0006] According to some embodiments of the present invention, in the motor, the lead-in end and lead-out end of the electromagnetic wire of the winding of the same phase are located in the same cavity and in the same slot.

[0007] According to some embodiments of the present invention, the terminal socket is provided with a plurality of said cavities, and each said cavity is into which a terminal is inserted.

[0008] According to some embodiments of the present invention, each of the terminals is electrically connected to a corresponding lead wire harness, and a plurality of the lead wire harnesses are connected to the same junction box.

[0009] According to some embodiments of the present invention, the motor further includes an insulating end plate located on the end face of the stator core, the insulating end plate and the terminal assembly being arranged circumferentially along the stator core, and the outer side of the insulating end plate being provided with a support boss for supporting the electromagnetic wire.

[0010] According to some embodiments of the present invention, the motor has a plurality of support bosses, which are spaced apart in the first direction.

[0011] According to some embodiments of the present invention, the stator core of the motor is provided with a fixing hole, and the terminal socket is provided with a fixing post that is inserted into the fixing hole.

[0012] According to some embodiments of the present invention, the motor has a support column inside the cavity for supporting the electromagnetic wire.

[0013] According to some embodiments of the present invention, in a motor, the opposite sidewalls of the wire groove abut against the support post to limit the displacement of the terminal.

[0014] According to some embodiments of the present invention, in the first direction, the height of the groove is K1, the height of the support column is K2, and the distance between the lower end face of the terminal and the bottom wall of the cavity is K3, wherein the terminal assembly satisfies the following relationship: 1.2≤K2*K1 / K3*ε≤19.8.

[0015] The present invention also proposes a compressor.

[0016] The compressor according to embodiments of the present invention includes the motor described in any of the above embodiments.

[0017] The compressor described above has the same advantages over the prior art as the motor described above, and will not be repeated here.

[0018] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1This is a schematic diagram of the stator core of an electric motor according to some embodiments of the present invention;

[0021] Figure 2 This is a schematic diagram of a terminal assembly of a motor according to some embodiments of the present invention;

[0022] Figure 3 yes Figure 2 A cross-sectional view of the terminal assembly shown;

[0023] Figure 4 yes Figure 3 A schematic diagram of the assembly of one terminal of the terminal assembly shown in the diagram within the cavity;

[0024] Figure 5 This is a schematic diagram of a lead wire harness according to some embodiments of the present invention;

[0025] Figure 6 This is an assembly diagram of multiple lead wire harnesses and junction boxes according to some embodiments of the present invention;

[0026] Figure 7 This is a schematic diagram of a compressor for an electric motor according to some embodiments of the present invention.

[0027] Figure label:

[0028] Compressor 1000,

[0029] Motor 100, upper housing 201, main housing 202, crankshaft 300, main bearing 401, auxiliary bearing 402, cylinder 501, piston 502, liquid reservoir 600.

[0030] Stator core 10, electromagnetic wire 11, insulating end plate 12, support boss 121

[0031] Terminal assembly 20,

[0032] Terminal socket 21, cavity 211, insertion port 212, fixing post 213, support post 214.

[0033] Terminal 22, wire groove 221, straight section 2211, flared opening 222,

[0034] Lead-out wire harness 30, plug 31, connector 32

[0035] Junction box 40. Detailed Implementation

[0036] Embodiments of the present invention 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 the present invention, and should not be construed as limiting the present invention.

[0037] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0038] Reference below Figures 1-7 A motor 100 according to an embodiment of the present invention is described.

[0039] According to an embodiment of the present invention, the motor 100 includes: a stator core 10 and a terminal assembly 20.

[0040] Specifically, an electromagnetic wire 11 is wound around the stator core 10 to form a multiphase winding. The terminal assembly 20 includes a terminal socket 21 and a terminal 22. The terminal socket 21 is fixed to the stator core 10. A cavity 211 is provided inside the terminal socket 211, and a portion of the electromagnetic wire 11 is provided inside the cavity 211. In a first direction, an insertion port 212 is provided at the upper end of the cavity 211. The terminal 22 is provided with a wire groove 221. The lower end of the terminal 22 is inserted into the cavity 211 through the insertion port 212. The terminal 22 is electrically connected to the electromagnetic wire 11 located in the wire groove 221. The diameter of the electromagnetic wire 11 is δ, the length between the lower end face of the terminal 22 and the upper end of the straight segment 2211 of the wire groove 221 is M, and the width of the wire groove 221 is ε. The motor 100 satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8.

[0041] It should be noted that "upper end" and "lower end" in the above description refer to relative positional relationship, not specific limitations.

[0042] It is understandable that, such as Figure 1 As shown, the terminal socket 21 is fixed to the stator core 10, and the upper end of the cavity 211 of the terminal socket 21 is open to form an insertion port 212 so that the terminal 22 can enter the cavity 211 along the insertion port 212. The lower end of the terminal 22 is provided with a wire groove 221, which is open toward the bottom wall of the cavity 211.

[0043] Thus, when terminal 22 is inserted into cavity 211, the lower end of terminal 22 (such as...) Figure 2 The lower end of terminal 22 is inserted into cavity 211 through insertion port 212. At this time, electromagnetic wire 11 enters wire groove 221, and during the process of electromagnetic wire 11 entering wire groove 221, electromagnetic wire 11 is punctured, so that the lower end of terminal 22 can be electrically connected to electromagnetic wire 11 located in wire groove 221.

[0044] For example, the electromagnetic wires 11 wound on the stator core 10 form a three-phase winding. When the terminal socket 21 is installed on the stator core 10, the cavity 211 contains a portion of at least two electromagnetic wires 11 of the same phase, and the terminal 22 is a piercing terminal. In this way, when the terminal 22 is installed in the cavity 211, the terminal 22 can pierce the two electromagnetic wires 11 of the same phase at the same time, avoiding the need to use multiple terminals 22 when the winding is connected in a delta configuration. This effectively reduces the number of terminals 22 connected, effectively reduces the cost of using terminals 22, and helps to effectively simplify the structure of the lead wire harness 30.

[0045] Terminal 22 is provided with a wire groove 221, which includes a straight segment 2211. The width of the straight segment 2211 is smaller than the wire diameter δ of the electromagnetic wire 11. That is, the width of the wire groove 221 is smaller than the wire diameter δ of the electromagnetic wire 11. The lower end of the wire groove 221 is formed with a flared opening 222. In this way, when the terminal 22 is inserted into the cavity 211 through the insertion port 212, the flared opening 222 can play a certain role in avoiding the electromagnetic wire 11, so as to avoid excessive stress between the terminal 22 and the electromagnetic wire 11. When the electromagnetic wire 11 contacts the straight segment 2211 of the wire groove 221, the terminal 22 can pierce the electromagnetic wire 11 to achieve electrical connection between the terminal 22 and the electromagnetic wire 11.

[0046] Wherein, the diameter of the electromagnetic wire 11 is δ, the length between the lower end face of the terminal 22 and the upper end of the straight segment 2211 of the wire groove 221 is M, the width of the wire groove 221 is ε, and the motor 100 satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8. For example, 3πδ 2 / 4εM=3、3πδ 2 / 4εM=8, or 3πδ 2 / 4εM=15.2, that is, when the motor 100 satisfies the above relationship, it can ensure that the terminal 22 meets the corresponding crimping height during the assembly process, and make the mutual stress between the terminal 22 and the electromagnetic wire 11 the optimal state. This ensures that the terminal 22 can fully pierce the electromagnetic wire 11, and also ensures that the terminal 22 can clamp the electromagnetic wire 11 at all times, so that the contact resistance of the terminal 22 is within a reasonable range, which is conducive to improving the reliability of the terminal 22 during use.

[0047] According to an embodiment of the present invention, the lower end of the motor 100 with terminal 22 can be inserted into the cavity 211 of terminal socket 21 through insertion port 212, so that terminal 22 is electrically connected to electromagnetic wire 11, and the motor 100 satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8, which ensures that the terminal 22 meets the corresponding crimping height during assembly and makes the mutual stress between the terminal 22 and the electromagnetic wire 11 optimal. This ensures that the terminal 22 can fully pierce the electromagnetic wire 11 and can always clamp the electromagnetic wire 11, thereby keeping the contact resistance of the terminal 22 within a reasonable range and improving the reliability of the terminal 22 during use.

[0048] In some embodiments, the lead-in end and lead-out end of the electromagnetic wire 11 of the winding of the same phase are located in the same cavity 211 and in the same groove 221.

[0049] In this way, the lead-in and lead-out ends of the electromagnetic wires 11 of the same phase winding can share a single terminal 22, thereby reducing the number of terminals 22 and effectively lowering the cost of terminals 22.

[0050] Furthermore, the terminal socket 21 is provided with a plurality of cavities 211, each cavity 211 into which a terminal 22 is inserted. In other words, the plurality of cavities 211 are integrated in the same terminal socket 21, the plurality of cavities 211 are spaced apart from each other, and each of the plurality of cavities 211 can be fitted with a terminal 22.

[0051] This makes it easier to reduce the number of terminal sockets 21, which helps to reduce the cost of using terminal sockets 21. In actual assembly, multiple terminals 22 can be installed sequentially on the same terminal socket 21, which helps to reduce the assembly difficulty of terminals 22 and improve assembly efficiency.

[0052] It should be noted that the number of cavities 211 within the terminal socket 21 can be determined according to the number of phases of the multiphase winding. For example, when the electromagnetic wires 11 wound on the stator core 10 form a three-phase winding, such as... Figure 2 As shown, the terminal socket 21 may be provided with three cavities 211, and each cavity 211 is provided with a portion of a phase electromagnetic wire 11. In this way, different terminals 22 correspond to different phase electromagnetic wires 11, thereby facilitating the electrical connection of different terminals 22 with different phase electromagnetic wires 11.

[0053] In some embodiments, each terminal 22 is electrically connected to a corresponding lead harness 30, and as... Figure 5 As shown, multiple lead-out harnesses 30 are connected to the same junction box 40.

[0054] Therefore, during assembly, one lead wire harness 30 can be inserted into the junction box 40 and fixed in place first. Then, the remaining lead wire harnesses 30 can be inserted into the junction box 40 and fixed respectively. This makes it easier to reduce the number of junction boxes 40, reduce the cost of using junction boxes 40, effectively simplify the lead wire structure, avoid assembly errors, and help prevent mistakes.

[0055] It should be noted that, as Figure 4 As shown, the two ends of the lead wire harness 30 can be provided with a plug 31 and a plug 32 respectively. The plug 32 is provided with a terminal 22. In actual assembly, the plug 32 cooperates with the terminal socket 21 so that the terminal 22 extends into the cavity 211 and is electrically connected to the electromagnetic wire 11. The plug 31 of the lead wire harness 30 is connected to the junction box 40, thereby facilitating the implementation of the lead wire structure of the terminal 22.

[0056] For example, when the electromagnetic wires 11 wound on the stator core 10 form a three-phase winding, such as Figure 2 As shown, the terminal socket 21 may have three cavities 211, and the plug 32 integrates three terminals 22. During assembly, the plug 32 mates with the terminal socket 21, and the three terminals 22 extend into the three cavities 211 respectively to be electrically connected to the corresponding electromagnetic wires 11. Each terminal 22 is electrically connected to a lead wire harness 30, i.e., three lead wire harnesses 30 are required. In this invention, as shown... Figure 5 As shown, the connectors 31 of the three lead wire harnesses 30 are installed on the same junction box 40.

[0057] This makes it easier to reduce the number of junction boxes 40, which helps to reduce the cost of using junction boxes 40, effectively simplifies the lead wire structure, and also provides a foolproof effect.

[0058] In some embodiments, such as Figure 1 As shown, the motor 100 also includes an insulating end plate 12 located on the end face of the stator core 10. The insulating end plate 12 and the terminal assembly 20 are arranged circumferentially along the stator core 10. The outer side of the insulating end plate 12 is provided with a support boss 121 for supporting the electromagnetic wire 11.

[0059] Therefore, by setting the insulating end plate 12, when the electromagnetic wire 11 wound on the electronic iron core forms a three-phase winding and uses a delta connection, the electromagnetic wire 11 can be crossed at the end through the insulating end plate 12, and the support boss 121 on the outer side of the insulating end plate 12 can support the electromagnetic wire 11, so as to ensure that the electromagnetic wire 11 between different phases has a sufficient electrical safety distance.

[0060] For example Figure 1 As shown, the stator core 10 has multiple insulating end plates 12, which are arranged sequentially along the circumference of the stator core 10 on the outer side of the stator core 10. For example... Figure 6As shown, the surface of the insulating end plate 12 has a corresponding support boss 121. The support boss 121 is divided into upper and lower layers for isolating electromagnetic wires 11 of different phases. That is, electromagnetic wires 11 of different phases are hung on the corresponding support boss 121 of the insulating end plate 12.

[0061] Therefore, when a three-phase winding is wound on the stator core 10 and the three-phase winding is connected in a delta configuration, the electromagnetic wire 11 can be crossed at the end through the insulating end plate 12 so that the lead-in end and lead-out end of the electromagnetic wire 11 of the same phase are located in the same cavity 211 at the same time. During the process of crossing the end of the electromagnetic wire 11, the electromagnetic wires 11 of different phases are hung on different support bosses 121 of the insulating end plate 12. The different support bosses 121 have a certain distance in the first direction to ensure that the electromagnetic wires 11 of different phases have sufficient electrical safety distance.

[0062] Furthermore, there are multiple support bosses 121, which are spaced apart in the first direction.

[0063] like Figure 6 As shown, there are four support bosses 121, and the four support bosses 121 are spaced apart in the first direction, that is, the four support bosses 121 are at different heights. In this way, during the end crossing process of the electromagnetic wire 11, the electromagnetic wires 11 of different phases are hung on different support bosses 121 of the insulating end plate 12. The different support bosses 121 have a certain distance in the first direction to ensure that the electromagnetic wires 11 of different phases have sufficient electrical safety distance.

[0064] Of course, the number of support bosses 121 mentioned above is only for illustrative purposes and does not represent a limitation.

[0065] In some embodiments, the stator core 10 is provided with fixing holes, such as... Figure 2 As shown, the terminal socket 21 is provided with a fixing post 213 that is inserted into the fixing hole.

[0066] Therefore, when the terminal socket 21 is installed on the stator core 10, the fixing post 213 of the terminal socket 21 can be inserted into the fixing hole of the stator core 10, that is, the terminal socket 21 and the stator core 10 are in a plug-in fit, thereby connecting the terminal socket 21 and the stator core 10, which enhances the connection stability between the terminal socket 21 and the stator core 10, and makes it easier to reduce the difficulty of installing and removing the terminal socket 21 and the stator core 10, and facilitates the disassembly of the terminal socket 21.

[0067] For example Figure 2As shown, the fixing post 213 can be located at the bottom of the terminal socket 21, so that when the terminal socket 21 is connected to the stator core 10, the fixing post 213 can be directly inserted into the fixing hole to connect the terminal socket 21 to the stator core 10. In this way, on the one hand, the connection between the terminal socket 21 and the stator core 10 can be realized, and on the other hand, after the connection between the terminal socket 21 and the stator core 10, the connection structure of the two will not occupy additional installation space, which is conducive to realizing the miniaturization design of the motor 100.

[0068] In other embodiments, the connection between the terminal socket 21 and the stator core 10 can be a plug-in connection or a bolt connection, etc., which are not limited here.

[0069] In some embodiments, such as Figure 2 and Figure 3 As shown, the cavity 211 is provided with a support column 214 for supporting the electromagnetic wire 11.

[0070] Therefore, by setting the support column 214, the electromagnetic wire 11 can be supported, which makes it easier to raise the height of the electromagnetic wire 11. After the terminal 22 enters the cavity 211 through the insertion port 212, the distance between the lower end of the terminal 22 and the electromagnetic wire 11 is shortened. This makes it easier to use a smaller terminal 22 to achieve electrical connection between the terminal 22 and the electromagnetic wire 11, which is conducive to the miniaturization design of the terminal 22.

[0071] As shown in Example 2, the support column 214 supports the electromagnetic wire 11, thereby enhancing the structural stability of the electromagnetic wire 11. After the terminal 22 is installed in the cavity 211, the upper end of the support column 214 is directly opposite the wire groove 221 of the terminal 22. This facilitates shortening the distance between the lower end of the terminal 22 and the electromagnetic wire 11, thereby enabling the use of a smaller terminal 22 to achieve electrical connection between the terminal 22 and the electromagnetic wire 11, which is beneficial for miniaturizing the terminal 22.

[0072] In some embodiments, such as Figure 3 As shown, the opposite sidewalls of the wire groove 221 (such as...) Figure 3 The side wall of the flared opening 222 in the middle abuts against the support column 214 to limit the displacement of the terminal 22.

[0073] Therefore, the displacement of terminal 22 can be limited, and the lower end of terminal 22 can be prevented from extending too far into cavity 211 and excessively squeezing electromagnetic wire 11, so as to ensure that the stress between the lower end of terminal 22 and electromagnetic wire 11 is within a reasonable range.

[0074] In some embodiments, such as Figure 3As shown, in the first direction, the height of the wire groove 221 is K1, the height of the support column 214 is K2, and the distance between the lower end face of the terminal 22 and the bottom wall of the cavity 211 is K3. The terminal assembly 20 satisfies the following relationship: 1.2≤K2*K1 / K3*ε≤19.8.

[0075] For example, terminal assembly 20 satisfies K2*K1 / K3*ε=6, or terminal assembly 20 satisfies K2*K1 / K3*ε=10, or terminal assembly 20 satisfies K2*K1 / K3*ε=15.2. When terminal assembly 20 satisfies the above relationship, it can effectively ensure that terminal 22 always has a sufficient safe distance from the bottom of cavity 211 during the pressing process; at the same time, terminal 22 pierces electromagnetic wire 11, electromagnetic wire 11 is within the maximum stress range of terminal 22, the inner wall of wire groove 221 and electromagnetic wire 11 have mutual stress, terminal 22 and electromagnetic wire 11 always meet the contact requirements, so that the heat generation of terminal 22 is within a reasonable range, which is conducive to extending the service life of terminal 22.

[0076] The present invention also proposes a compressor 1000.

[0077] The compressor 1000 according to an embodiment of the present invention includes the motor 100 of any of the above embodiments.

[0078] It should be noted that the compressor 1000 in this invention can be a DC inverter compressor, such as... Figure 7 As shown, it includes an upper housing 201 and a main housing 202. The upper housing 201 and the main housing 202 are connected and define an installation space. A motor 100, a crankshaft 300, a main bearing 401, a secondary bearing 402, a cylinder 501, and a piston 502 are installed in the installation space. A liquid reservoir 600 is connected to the outside of the main housing 202.

[0079] The DC inverter compressor described above is only for illustrative purposes. The compressor 1000 in this invention can also be other types of compressors, and no limitation is made here.

[0080] According to an embodiment of the present invention, the lower end of the motor 100 with terminal 22 can be inserted into the cavity 211 of terminal socket 21 through insertion port 212, so that terminal 22 is electrically connected to electromagnetic wire 11, and the motor 100 satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.8, which ensures that the terminal 22 meets the corresponding crimping height during assembly and makes the mutual stress between the terminal 22 and the electromagnetic wire 11 optimal. This ensures that the terminal 22 can fully pierce the electromagnetic wire 11 and can always clamp the electromagnetic wire 11, thereby keeping the contact resistance of the terminal 22 within a reasonable range and improving the reliability of the terminal 22 during use.

[0081] In the description of this invention, 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "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 the present invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Although embodiments of the invention have been shown and described, those skilled in the art will understand that these practices may be implemented without departing from the principles and spirit of the invention.

Claims

1. An electric motor, characterized in that, include: Stator core, wherein electromagnetic wire is wound around the stator core to form a multiphase winding; A terminal assembly includes a terminal socket and a terminal. The terminal socket is fixed to the stator core. The terminal socket has a cavity inside, and a portion of the electromagnetic wire is disposed in the cavity. In a first direction, the upper end of the cavity has an insertion port. The terminal has a wire groove, and the lower end of the terminal is inserted into the cavity through the insertion port. The terminal is electrically connected to the electromagnetic wire located in the wire groove. Wherein, the diameter of the electromagnetic wire is δ, the length between the lower end face of the terminal and the upper end of the straight segment of the wire groove is M, the width of the wire groove is ε, and the motor satisfies the following relationship: 0.7 < 3πδ 2 / 4εM<17.

8.

2. The motor according to claim 1, characterized in that, The lead-in end and lead-out end of the electromagnetic wire of the winding of the same phase are located in the same cavity and in the same slot.

3. The motor according to claim 2, characterized in that, The terminal socket has multiple cavities, and one terminal is inserted into each cavity.

4. The motor according to claim 3, characterized in that, Each terminal is electrically connected to a corresponding lead wire harness, and multiple lead wire harnesses are connected to the same junction box.

5. The motor according to claim 1, characterized in that, It also includes an insulating end plate located on the end face of the stator core. The insulating end plate and the terminal assembly are arranged circumferentially along the stator core. The outer side of the insulating end plate is provided with a support boss for supporting the electromagnetic wire.

6. The motor according to claim 5, characterized in that, There are multiple support bosses, and the multiple support bosses are spaced apart in the first direction.

7. The motor according to claim 1, characterized in that, The stator core is provided with a fixing hole, and the terminal socket is provided with a fixing post that is inserted into the fixing hole.

8. The motor according to any one of claims 1-7, characterized in that, The cavity is provided with a support column for supporting the electromagnetic wire.

9. The motor according to claim 8, characterized in that, The opposite sidewalls of the cable tray abut against the support post to limit the displacement of the terminal.

10. The motor according to claim 9, characterized in that, In the first direction, the height of the groove is K1, the height of the support column is K2, and the distance between the lower end face of the terminal and the bottom wall of the cavity is K3, wherein the terminal assembly satisfies the following relationship: 1.2≤K2*K1 / K3*ε≤19.

8.

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

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