Stator assembly, motor and compressor

Abstract

The invention discloses a stator assembly, a motor and a compressor, the stator assembly comprises a stator punching sheet, a main winding and an auxiliary winding, the stator punching sheet is provided with winding grooves, a plurality of winding grooves form four groove groups, the four groove groups are located in four quadrants, and the winding grooves are arranged in the winding grooves. Each groove group comprises two first grooves, two second grooves, a third groove and a fourth groove, and the slotting sizes of the first grooves, the second grooves, the third groove and the fourth groove are sequentially reduced; the main winding is arranged in the first groove, the second groove and the third groove; the secondary windings are arranged in the second groove, the third groove and the fourth groove, and the secondary windings in the second groove and the third groove are located on the radial inner sides of the primary windings in the second groove and the third groove. Therefore, by optimizing the groove type of the winding groove and the layout of the main winding and the auxiliary winding, the starting torque of the motor can be improved and the starting requirement can be met under the condition that the efficiency and the maximum torque are ensured, and then a starter can be omitted, so that the cost is saved, the size is optimized and the operation reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a stator assembly, a motor and a compressor. BACKGROUND

[0002] In the related art, a reciprocating compressor is applied to a heat pump type clothes dryer. The reciprocating compressor has the advantages of providing high pressure and pressure ratio, good noise reduction and vibration isolation effect, relatively simple and mature structure, etc. Therefore, the working performance, use experience and maintenance cost of the heat pump type clothes dryer can be improved. In the starting process of the reciprocating compressor, a larger starting current than that in the steady state working condition is usually consumed to make the motor starting torque reach the required value, so that the compressor can work normally. At present, a starter is generally used for the motor to realize auxiliary starting. However, this not only increases the manufacturing cost and overall volume of the compressor, but also may affect the normal operation of the compressor due to the failure of the starter. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a stator assembly which can improve the motor starting torque under the condition of ensuring efficiency and maximum torque by optimizing the winding slot type and the layout of the main winding and the auxiliary winding, meet the starting requirements, and thus cancel the starter to save cost, optimize the volume and improve the operation reliability.

[0004] The present application further provides a motor having the above stator assembly.

[0005] The present application further provides a compressor having the above motor.

[0006] According to the stator assembly of the first aspect of the present application, the stator assembly comprises: a plurality of stator laminations, a main winding and an auxiliary winding. The plurality of stator laminations are stacked along the axial direction of the motor. The stator laminations are provided with winding slots. The plurality of winding slots are configured as four slot groups. A coordinate system is established along the axial direction of the motor. The four slot groups are located in four quadrants. Each slot group comprises two first slots, two second slots, one third slot and one fourth slot. The slot sizes of the first slot, the second slot, the third slot and the fourth slot decrease in turn. The main winding is arranged in the first slot, the second slot and the third slot. The auxiliary winding is arranged in the second slot, the third slot and the fourth slot. The auxiliary winding in the second slot and the third slot is located radially inside the main winding in the second slot and the third slot.

[0007] According to the stator assembly of the application, by reasonably arranging the winding slot type on the stator sheet and the arrangement and distribution of the winding slots, the layout of the main winding and the auxiliary winding is optimized, the starting torque of the motor can be effectively improved under the condition of ensuring the efficiency and the maximum torque, the starting requirement of the compressor is met, and then the starter can be cancelled, so that the cost can be saved, the overall volume is optimized, the normal operation of the compressor can be avoided due to the failure of the starter, and the working reliability can be improved.

[0008] According to some embodiments of the application, the total number of turns of the auxiliary winding and the main winding is 0.4-1.5.

[0009] In some embodiments, the main winding defines a five-segment main winding coil, and the main winding coil edge span slot numbers are 11, 9, 7, 5 and 3 respectively; the auxiliary winding defines a four-segment auxiliary winding coil, and the auxiliary winding coil edge span slot numbers are 11, 9, 7 and 5 respectively.

[0010] Further, the more the span slot numbers and the turns of the main winding coil and the auxiliary winding coil are, or the turns are equal and follow a sinusoidal distribution, and the slot fill rate is less than or equal to 95%.

[0011] According to some embodiments of the application, the outer contour of the stator sheet has a transverse dimension D1 and a longitudinal dimension D2, and 80mm≤D1≤108mm and 5mm≤D2-D1≤15mm.

[0012] Further, the inner diameter of the stator sheet is 50-60mm.

[0013] In some embodiments, the stator sheet is further provided with mounting holes, and the distance between the mounting holes adjacent in the longitudinal direction is T, and 70mm≤T≤90mm is satisfied.

[0014] According to some embodiments of the application, the stator assembly further comprises a running capacitor, the running capacitor is connected in series with the auxiliary winding, the auxiliary winding is connected in parallel with the main winding, and the capacitance of the running capacitor ranges from 2uf to 20uf.

[0015] Further, the stator assembly further comprises a socket and a protector, and the socket and the protector are integrally integrated.

[0016] According to the motor of the second aspect of the application, the motor comprises the stator assembly of any one of the above embodiments.

[0017] According to the compressor of the third aspect of the application, the compressor comprises the motor of the above embodiments.

[0018] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and the attendant drawings or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the accompanying drawings.

[0020] Figure 1 is a schematic diagram of a motor structure according to some embodiments of the present application;

[0021] Figure 2 is a schematic diagram of a motor operation principle according to some embodiments of the present application;

[0022] Figure 3 is a schematic diagram of a main winding and a sub-winding in a winding slot according to some embodiments of the present application;

[0023] Figure 4 is a schematic diagram of a stator lamination according to some embodiments of the present application.

[0024] REFERENCE NUMERALS:

[0025] 1000, compressor;

[0026] 100, motor;

[0027] 10, stator assembly;

[0028] 1, stator lamination;

[0029] 11, winding slot; 11a, first slot; 11b, second slot; 11c, third slot; 11d, fourth slot;

[0030] 12, mounting hole;

[0031] 13, inner hole;

[0032] 2, main winding;

[0033] 3, sub-winding;

[0034] 4, operation capacitor;

[0035] 5, socket and protector integrated piece;

[0036] 6, wire harness;

[0037] 7, built-in protector. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0040] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0044] 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.

[0045] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0046] In the description of this invention, 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 indicating that the first feature is at a higher horizontal level than the second feature.

[0047] In this application, "multiple" means two or more (including two).

[0048] The following is for reference. Figures 1-4 The stator assembly 10, motor 100, and compressor 1000 according to embodiments of the present invention are described.

[0049] like Figure 1 and Figure 3 As shown, according to a first aspect embodiment of the present invention, the stator assembly 10 includes: stator laminations 1, main winding 2, and auxiliary winding 3.

[0050] The stator laminations 1 are multiple, stacked along the axial direction of the motor 100. Each stator lamination 1 has a winding slot 11, which is configured as four slot groups. A coordinate system is established along the axial direction of the motor 100, with the four slot groups located in four quadrants. Each slot group includes two first slots 11a, two second slots 11b, one third slot 11c, and one fourth slot 11d. The slot dimensions of the first slots 11a, second slots 11b, third slots 11c, and fourth slots 11d decrease sequentially. The main winding 2 is located in the first slots 11a, second slots 11b, and third slots 11c. The auxiliary winding 3 is located in the second slots 11b, third slots 11c, and fourth slots 11d. The auxiliary winding 3 in the second slots 11b and third slots 11c is located radially inside the main winding 2 in the second slots 11b and third slots 11c.

[0051] Specifically, the stator laminations 1 are constructed as multiple stacked along the axial direction of the motor 100. Each stator lamination 1 is provided with multiple winding slots 11 arranged at intervals in the circumferential direction. The winding slots 11 are used to install and fix the main winding 2 and the auxiliary winding 3. The multiple winding slots 11 can be divided into four slot groups. A coordinate system is established along the axial direction of the motor 100. The four slot groups are located in four quadrants and are symmetrically distributed about 1 / 4 of the circumference. Taking the slot group located in the first quadrant as an example, the slot groups in the first quadrant and the second quadrant are symmetrical left and right, and the slot groups in the first quadrant and the fourth quadrant are symmetrical up and down. Each slot group consists of six slots, specifically two first slots 11a, two second slots 11b, one third slot 11c, and one fourth slot 11d arranged sequentially in the circumferential direction. The slot size of the first slot 11a, second slot 11b, third slot 11c, and fourth slot 11d decreases sequentially. The arrangement of the six slots in each slot group for the main winding 2 and the auxiliary winding 3 is as follows: the first slot 11a contains only the main winding 2, the fourth slot 11d contains only the auxiliary winding 3, and the second slots 11b and third slot 11c contain both the main winding 2 and the auxiliary winding 3. Furthermore, the auxiliary winding 3 in the second slots 11b and third slot 11c is located radially inside the main winding 2 in the second slots 11b and third slot 11c. It can be understood that the main winding 2 and the auxiliary winding 3 are arranged in layers radially.

[0052] According to the stator assembly 10 of the present invention, by reasonably setting the slot type and arrangement of the winding slots 11 on the stator laminations 1, the layout of the main winding 2 and the auxiliary winding 3 is optimized. Under the condition of ensuring efficiency and maximum torque, the starting torque of the motor 100 can be effectively improved to meet the starting requirements of the compressor 1000. In this way, the starter can be eliminated, which can save costs, optimize the overall size, and avoid the impact of starter failure on the normal operation of the compressor 1000, thereby improving the reliability of operation.

[0053] Furthermore, in some specific embodiments of the present invention, the winding slot 11 is constructed as a round-bottomed slot with its opening facing the center of the stator lamination 1. The round-bottomed slot is simple to manufacture, and it helps to improve the slot fill factor and the uniformity of the magnetic field distribution, thereby improving the performance and efficiency of the motor 100. The round-bottomed slot can also provide a larger heat dissipation area, which helps to improve the heat dissipation performance of the motor 100.

[0054] like Figure 3 As shown, according to some embodiments of the present invention, the total turns ratio of the secondary winding 3 and the main winding 2 is 0.4 to 1.5.

[0055] Specifically, when the total turns ratio of the auxiliary winding 3 and the main winding 2 is too small or too large, such as 0.2 or 1.7, it will reduce the starting performance and operating efficiency of the motor 100, resulting in poor starting performance and poor overall operation. By setting the total turns ratio of the auxiliary winding 3 and the main winding 2 within the aforementioned range—for example, 0.7, 0.9, or 1.1—the turns ratio of the auxiliary winding 3 and the main winding 2 can be reasonable, thereby optimizing the starting performance of the motor 100 and improving its operating efficiency.

[0056] like Figure 3 As shown, according to some embodiments of the present invention, the main winding coil defined by the main winding 2 has a five-segment structure, and the number of slots across the main winding coil is 11, 9, 7, 5 and 3 respectively; the secondary winding coil defined by the secondary winding 3 has a four-segment structure, and the number of slots across the secondary winding coil is 11, 9, 7 and 5 respectively.

[0057] Specifically, in this invention, each stator lamination 1 has four slot groups, and each slot group has six winding slots 11. Therefore, each stator lamination 1 has a total of twenty-four winding slots 11. The main winding coil consists of five coil segments of different lengths, and the number of slots spanned by the coil sides of each coil segment is 11, 9, 7, 5, and 3, respectively. That is, the two effective sides of the first coil segment of the main winding coil span 11 slots on the stator lamination 1, the two effective sides of the second coil segment span 9 slots on the stator lamination 1, the two effective sides of the third coil segment span 7 slots on the stator lamination 1, the two effective sides of the fourth coil segment span 5 slots on the stator lamination 1, and the two effective sides of the fifth coil segment span 11 slots on the stator lamination 1. The number of slots spanned by the two effective sides of the first coil segment in the secondary winding coil is 3; the secondary winding coil consists of four coil segments of different lengths, and the number of slots spanned by the coil sides of each coil segment is 11, 9, 7, and 5 respectively. That is, the number of slots spanned by the two effective sides of the first coil segment in the secondary winding coil is 11, the number of slots spanned by the two effective sides of the second coil segment is 9, the number of slots spanned by the two effective sides of the third coil segment is 7, and the number of slots spanned by the two effective sides of the fourth coil segment is 5.

[0058] By setting the main winding coil to a five-segment structure and the auxiliary winding coil to a four-segment structure, and limiting the number of slots across the main winding coil and the auxiliary winding coil, the magnetic field distribution and current path inside the motor 100 can be improved, thereby optimizing the starting torque, operating efficiency and vibration reduction and noise reduction performance of the motor 100.

[0059] like Figure 3 As shown, according to some embodiments of the present invention, the number of turns of the main winding coil and the secondary winding coil is such that the more slots they span, the more turns they have, or the number of turns is equal, and they are distributed sinusoidally, with a slot fill factor of less than or equal to 95%.

[0060] Specifically, in this invention, the turn distribution of the main winding coil and the auxiliary winding coil can be configured such that the more slots spanned, the more turns are generated. In areas with a large number of slots spanned, the corresponding part of the main winding coil spans a longer distance across multiple winding slots 11. By increasing the number of turns, the continuity of magnetic flux and electromotive force in this area can be maintained, the uniformity of magnetic field distribution within the motor 100 can be improved, and the working performance of the motor 100 can be optimized. In this invention, the turn distribution of the main winding coil and the auxiliary winding coil can also be configured such that the number of turns is equal and follows a sinusoidal distribution. This can be understood as the distribution of the number of turns of the main winding coil and the auxiliary winding coil in multiple winding slots 11 can vary according to the law of a sinusoidal waveform. By adopting this sinusoidal distribution arrangement, it can be ensured that the motor 100 generates a smoother magnetic field distribution and current waveform during operation, thereby optimizing the torque, operating efficiency, and vibration reduction and noise reduction performance of the motor 100.

[0061] It should be noted that when the slot fill factor of winding slot 11 is too small, such as 80%, the space utilization rate of the winding coil in winding slot 11 is low, which is detrimental to the operating efficiency of motor 100. However, the slot fill factor should not be too large either, such as 98%, as this would result in excessive filling of the winding coil in winding slot 11, leaving insufficient space for heat dissipation and insulation, thereby affecting the safety and operating efficiency of motor 100. In this invention, the slot fill factor is constructed to be less than or equal to 95%, which is beneficial for improving the operating efficiency of motor 100 while ensuring its reliability and safety.

[0062] like Figure 4 As shown, according to some embodiments of the present invention, the outer contour of the stator lamination 1 has a lateral dimension of D1 and a longitudinal dimension of D2, and 80mm≤D1≤108mm, 5mm≤D2-D1≤15mm.

[0063] Specifically, the outer contour cross-section of stator lamination 1 is rectangular. The maximum horizontal dimension of the outer contour of stator lamination 1 is D1, and the maximum vertical dimension is D2. By limiting the range of values ​​for D1 and D2, the range of dimensions of the outer contour of stator lamination 1 can be defined, and the space required for the arrangement of stator lamination 1 can be determined. The lateral dimension D1 ranges from 80mm to 108mm, and the longitudinal dimension D2 is larger than the lateral dimension D1. The difference between the longitudinal dimension D2 and the lateral dimension D1 ranges from 5mm to 15mm. For example, the lateral dimension D1 can be 90mm, 95mm, or 100mm. If the difference between the longitudinal dimension D2 and the lateral dimension D1 is 10mm, then the longitudinal dimension D2 corresponds to 100mm, 105mm, or 110mm. By setting the values ​​of the lateral dimension D1 and the longitudinal dimension D2 of the stator lamination 1 within the above range, the outer contour dimension of the stator lamination 1 has a suitable range. In this way, while ensuring that the size of the stator assembly 10 can fully accommodate the winding, the compatibility of the stator assembly 10's appearance dimensions with the size of the motor 100 and the compressor 1000 is improved, ensuring the normal installation and arrangement of the stator assembly 10 and guaranteeing the operational reliability of the motor 100 and the compressor 1000.

[0064] like Figure 4 As shown, according to some embodiments of the present invention, the inner diameter of the stator lamination 1 is 50mm to 60mm.

[0065] Specifically, the stator lamination 1 can be formed with an inner hole 13 that extends through the stator lamination 1 along the axial direction. The inner hole 13 is used to accommodate the rotor part of the motor 100. The maximum outer diameter of the inner hole 13 is the inner diameter of the stator lamination 1, which is set in the range of 50mm to 60mm. For example, the inner diameter of the stator lamination 1 can be 54mm, 56mm or 58mm, etc. By limiting the range of the inner diameter of the stator lamination 1, the size of the inner hole 13 of the stator lamination 1 can be limited, thereby improving the overall assembly compatibility of the stator lamination 1, the rotor and the motor 100, and ensuring that the gap between the stator lamination 1 and the rotor is appropriate, so as to optimize the performance and operational reliability of the motor 100.

[0066] like Figure 4 As shown, according to some embodiments of the present invention, the stator lamination 1 is further provided with mounting holes 12, and the distance between adjacent mounting holes 12 in the longitudinal direction is T, which satisfies: 70mm≤T≤90mm.

[0067] Specifically, the stator lamination 1 is provided with a plurality of mounting holes 12 spaced apart. The mounting holes 12 can be used to cooperate with fasteners to fix the stator lamination 1 to other components of the motor 100, ensuring the stable operation of the motor 100. Preferably, there are four mounting holes 12, located near the four corners of the rectangular stator lamination 1. The distance between two adjacent mounting holes 12 in the longitudinal direction is set in the range of 70mm to 90mm. By setting the distance between adjacent mounting holes 12 in the longitudinal direction within this range, for example, the distance between adjacent mounting holes 12 in the longitudinal direction can be 75mm, 80mm or 85mm, etc., which can ensure that the position of the mounting holes 12 can be adapted to the structure, size and heat dissipation requirements of the stator lamination 1 and the motor 100, and can also improve the convenience of installation and maintenance of the stator lamination 1.

[0068] It should be noted that the mounting holes 12 are arranged in four locations near the four corners of the stator lamination 1, which ensures a good and stable connection between the stator lamination 1 and the motor 100, helps improve assembly and maintenance efficiency, and also helps save manufacturing costs. However, in some embodiments, the number of mounting holes 12 may be greater than four to further improve the installation stability of the stator lamination 1. Furthermore, the specific number, shape, and size of the mounting holes 12 can be determined according to the design requirements and manufacturing process of the motor 100.

[0069] like Figure 2 As shown, according to some embodiments of the present invention, the stator assembly 10 further includes: a running capacitor 4, which is connected in series with the secondary winding 3 and the secondary winding 3 is connected in parallel with the main winding 2, and the capacitance value of the running capacitor 4 is in the range of 2uF to 20uF.

[0070] Specifically, the structure formed by the running capacitor 4 and the auxiliary winding 3 connected in series is connected in parallel with the main winding 2. During the starting process of the motor 100, due to the presence of the running capacitor 4, the current in the auxiliary winding 3 will lead the current in the main winding 2, generating a phase difference. This creates a good rotating magnetic field inside the motor 100, thereby improving the starting efficiency and operating performance of the motor 100, while also meeting the starting torque and maximum torque requirements of the motor 100. If the capacitance of the running capacitor 4 is too small, it may cause difficulty in starting the motor 100 or unstable operation; if the capacitance is too large, it may increase the energy consumption and temperature rise of the motor 100. In this invention, the capacitance range of the running capacitor 4 is constructed to be 2uF to 20uF. For example, the capacitance range of the running capacitor 4 can be 5uF, 10uF, or 15uF, etc., making the capacitance range of the running capacitor 4 reasonable. This optimizes the starting performance and operating stability of the motor 100 and saves energy.

[0071] like Figure 1 As shown, according to some embodiments of the present invention, the stator assembly 10 further includes a socket and a protector, wherein the socket and the protector are integrated into one piece.

[0072] Specifically, the socket is used to connect to the power supply to access the external circuit, thereby receiving electrical energy to enable the stator assembly 10 to operate; the protector can provide good overload protection, short circuit protection, and overheat protection to protect the motor 100 from overload, short circuit, or other abnormal conditions. In this invention, the socket and protector can be integrated into one piece, forming a socket and protector integrated component 5, and connected to the motor 100 through a wiring harness 6. By constructing the socket and protector into an integrated structure, firstly, the number of connecting parts and housings can be reduced, achieving cost reduction and weight reduction; secondly, the structural compactness of the socket and protector can be improved, saving layout space (such as saving space in the compressor 1000 terminal cover); thirdly, the required connection points and wiring can be reduced, thereby improving the convenience of installation and maintenance.

[0073] In addition, such as Figure 2 As shown, in some specific embodiments of the present invention, a built-in protector 7 is provided inside the compressor 1000 for overload protection, short circuit protection, and overheat protection of the compressor 1000, thereby improving the operating safety and lifespan of the compressor 1000. The built-in protector 7 can directly contact the coil of the motor 100 of the compressor 100, and can sensitively sense changes in the coil, accurately monitor the internal operating conditions of the compressor 1000, and has high reliability.

[0074] like Figure 1 As shown, according to a second aspect embodiment of the present invention, the motor 100 includes: the stator assembly 10 described in any of the above embodiments.

[0075] Specifically, since the motor 100 according to the second aspect embodiment of the present invention includes the stator assembly 10 described in any of the above embodiments, the stator assembly 10 in the motor 100 can improve the starting torque of the motor 100 and meet the starting capability requirements by optimizing the slot type of the winding slot 11, the winding distribution and the number of winding turns. This eliminates the need for a starter to assist in starting, thereby saving costs, optimizing the overall size of the motor 100, and avoiding the impact of starter failure on the normal operation of the motor 100, thus improving the reliability and safety of the motor 100.

[0076] like Figure 1 and Figure 2 As shown, according to a third aspect embodiment of the present invention, the compressor 1000 includes the motor 100 described in the above embodiments, and the resulting technical effects are the same as those in the above embodiments, and will not be repeated here.

[0077] 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 the 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.

[0078] Although embodiments of the invention 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 the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A stator assembly characterized by, It comprises: a plurality of stator laminations stacked along the axial direction of the motor, the stator laminations being provided with winding slots, the plurality of winding slots being configured as four slot groups, a coordinate system being established along the axial direction of the motor, the four slot groups being located in four quadrants, and each of the slot groups comprising two first slots, two second slots, one third slot and one fourth slot, the slot opening sizes of the first slot, the second slot, the third slot and the fourth slot decreasing in turn; a main winding provided in the first slot, the second slot and the third slot; a sub-winding provided in the second slot, the third slot and the fourth slot, and the sub-winding in the second slot and the third slot being located radially inward of the main winding in the second slot and the third slot.

2. The stator assembly of claim 1, wherein, The total number of turns of the sub-winding and the main winding is 0.4-1.

5.

3. The stator assembly of claim 1, wherein, The main winding defines a main winding coil with a five-segment structure, and the main winding coil edge span slot numbers are 11, 9, 7, 5 and 3 respectively; the sub-winding defines a sub-winding coil with a four-segment structure, and the sub-winding coil edge span slot numbers are 11, 9, 7 and 5 respectively.

4. The stator assembly of claim 3, wherein, The more the span slot numbers of the main winding coil and the sub-winding coil are, the more the number of turns is, or the number of turns is equal, and the turns are distributed according to the sine distribution, and the slot fill factor is less than or equal to 95%.

5. The stator assembly of claim 1, wherein, The outer contour of the stator lamination has a transverse dimension D1 and a longitudinal dimension D2, and 80mm≤D1≤108mm, 5mm≤D2-D1≤15mm.

6. The stator assembly of claim 5, wherein, The inner diameter of the stator lamination is 50-60mm.

7. The stator assembly of claim 1, wherein, The stator lamination is further provided with mounting holes, and the distance between the mounting holes adjacent in the longitudinal direction is T, and 70mm≤T≤90mm.

8. The stator assembly of claim 1, wherein, It further comprises a running capacitor connected in series with the sub-winding, and the sub-winding is connected in parallel with the main winding, and the capacitance of the running capacitor ranges from 2uf to 20uf.

9. The stator assembly of claim 8, wherein, It further comprises: a socket and a protector, the socket and the protector being integrally integrated.

10. An electric machine characterized by It comprises: the stator assembly of any one of claims 1-9.

11. A compressor characterized by, It comprises: the motor of claim 10.

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