Stator, motor and compressor

Abstract

The utility model provides a kind of stator, motor and compressor.The stator includes: stator core, is equipped with multiple stator teeth, and forms stator slot between two adjacent stator teeth;Slot insulation is provided in stator slot, and slot insulation includes hollow tubular part and fold part in the inside, fold part is set along the circumference of tubular part, and is located at at least one end of tubular part, fold part is located at the side of tubular part away from stator core, and fold part and the axis of tubular part are parallel;Multiple windings are wound on stator teeth, and part structure is located in stator slot;Slot insulation is located between winding and stator tooth;Slot wedge is located in stator slot, and is located between two adjacent windings, and the end of slot wedge is in contact with one end of fold part towards stator core.The utility model sets fold part on the side of tubular part away from stator core, and then the end of slot wedge can be in contact with the end of fold part, limit the movement of slot wedge, avoid slot wedge to come out of stator slot, improve the reliability of motor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to a stator, motor and compressor. Background Technology

[0002] In existing technology, the slot wedges in the concentrated winding type variable frequency motors used in variable frequency air conditioners exhibit a "flying out" defect after operation, especially in models with low enameled wire slot fill rate. To address this issue, removing the slot wedges can lead to poor contact between adjacent non-phase motor coils; adding cover plates to the upper / lower insulation supports of the motor coils can increase material costs or result in limitations due to insufficient air conditioner design. Utility Model Content

[0003] To address the problems in the existing technology, the purpose of this utility model is to provide a stator, motor, and compressor that improves the stator yield and the reliability of the motor during operation.

[0004] This utility model embodiment provides a stator, including:

[0005] The stator core has multiple stator teeth, and stator slots are formed between two adjacent stator teeth. Slot insulation is provided in the stator slot. The slot insulation includes a hollow tubular part and a folded part. The folded part is arranged circumferentially along the tubular part and is located at at least one end of the tubular part. The folded part is located on the side of the tubular part away from the stator core, and the folded part is parallel to the axis of the tubular part.

[0006] Multiple windings are wound around the stator teeth, and part of the structure is located within the stator slots; the slot insulation is located between the windings and the stator teeth;

[0007] A slot wedge is disposed in the stator slot and located between two adjacent windings, with the end of the slot wedge abutting against the end of the folded portion facing the stator core.

[0008] In some embodiments, the axial height of the folded portion is Z1, which satisfies: 3mm≤Z1≤5.5mm.

[0009] In some embodiments, the total axial length of the tubular portion is Z, and the total height of the stator core is h, satisfying: h+5mm≤Z≤h+10mm.

[0010] In some embodiments, the total length of the slot wedge is L, which satisfies L≤Z-2Z1.

[0011] In some embodiments, the slotted wedge includes a first part and a second part connected together, and the slotted wedge is V-shaped.

[0012] In some embodiments, the first part has a first bend on the side opposite to the second part, and the second part has a second bend on the side opposite to the first part.

[0013] In some embodiments, the width of both the first bend and the second bend is d, satisfying: 0.5mm≤d≤2mm.

[0014] In some embodiments, the first part and the first bent part form an angle θ1, and the second part and the second bent part form an angle θ2, satisfying: 45°≤θ1≤105°, 45°≤θ2≤105°.

[0015] One embodiment of this utility model provides an electric motor, including a stator and a rotor as described above, wherein the rotor is coaxially arranged with the stator and the rotor and the stator form an air gap fit.

[0016] One embodiment of this utility model provides a compressor, including the motor described above.

[0017] The stator, motor, and compressor provided by this utility model have the following advantages:

[0018] By setting a folded part on the side of the tubular part away from the stator core, the end of the slot wedge abuts against the end of the folded part facing the stator core. In this way, the folded part can restrict the movement of the slot wedge, making it less likely for the slot wedge to come out of the stator slot, improving the stator yield, and improving the reliability of the motor during operation. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of a stator with an insulating support in the prior art;

[0021] Figure 2 yes Figure 1 An enlarged view of the area indicated by the circle;

[0022] Figure 3 This is a schematic diagram of a stator without an insulating support in the prior art;

[0023] Figure 4 yes Figure 2 An enlarged view of the area indicated by the circle;

[0024] Figure 5 This is a schematic diagram of slot insulation in the prior art;

[0025] Figure 6 This is a schematic diagram of a stator provided in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of slot insulation provided in an embodiment of the present invention;

[0027] Figure 8 This is a partially enlarged schematic diagram of slot insulation provided in one embodiment of the present invention;

[0028] Figure 9 This is a partially enlarged schematic diagram of slot insulation provided in one embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of a groove wedge provided in an embodiment of the present invention;

[0030] Figure 11 This is a top view of a groove wedge provided in an embodiment of this utility model.

[0031] Figure label:

[0032] 100' stator 11 stator teeth

[0033] 10' stator core, 12 stator slots

[0034] 11' stator teeth 20 winding

[0035] 12' stator slot 30 slot insulation

[0036] 20' Winding 31 Tubular Section

[0037] 30' slot insulation 32 folded section

[0038] 30a' Upper end 40 groove wedge

[0039] 30b' Lower end 41 Part 1

[0040] 40' Slotted Wedge 42 Part Two

[0041] 100 Stator 43 First Bend

[0042] 10 Stator core 44 Second bend Detailed Implementation

[0043] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may mean “and” or “or”.

[0044] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented 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 different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0045] Furthermore, the terms "first" and "second" are used for illustrative 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 at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0047] Figure 1 A schematic diagram of a prior art stator with an insulating support is shown; Figure 2 It shows Figure 1 An enlarged view of the area indicated by the circle; Figure 3 A schematic diagram of a prior art stator without an insulating support is shown; Figure 4 It shows Figure 3 An enlarged view of the area indicated by the circle; Figure 5 A schematic diagram of groove insulation in the prior art is shown. (e.g.) Figures 1 to 5As shown, the stator 100' includes a stator core 10' and multiple windings 20'. The stator core 10' has multiple stator teeth 11', and a stator slot 12' is formed between two adjacent stator teeth 11'. The windings 20' are wound on the stator teeth 11' and are made of enameled wire. The stator slot 12' has slot insulation 30' to isolate the stator core 10' and the windings 20', thus forming insulation between the stator core 10' and the windings 20'. The stator slot 12' also has slot wedges 40' to isolate two adjacent windings 20', thus forming insulation between the windings 20'.

[0048] like Figure 5 As shown, the two ends of the slot insulation 30' located in the stator slot 12' are generally without folded edges (e.g. Figure 5 The lower end 30b' shown) or the outward folded edge structure (such as Figure 5 The upper end 30a' shown is an example, where the outward folded edge is only for models where the upper and lower end faces of the stator core have stepped differences, or as shown in the example. Figure 3 (For models without insulation supports). The slot insulation 30' is naturally unfolded and fits inside the stator slot 12'. Its total length is generally higher than the stator core 10' but lower than the winding 20' or the highest point inside the insulation support. The slot wedge 40' is generally V-shaped, and its total length is generally greater than or equal to the total length of the slot insulation 30'.

[0049] In the prior art, the contact surfaces of the slot wedge 40' with the slot insulation 30' and the winding 20' are smooth, resulting in low frictional resistance. Due to the influence of refrigerant flow, the slot wedge 40' is prone to vertical transmission within the stator slot 12'. This is especially true in compressors with a small number of turns in the winding 20' (low slot fill factor) and without cover plates on the upper / lower insulation supports. In such cases, the slot wedge 40' is prone to "flying out," which can lead to compressor stall, out-of-phase discharge, and other failures.

[0050] To address the problems in the prior art, this utility model provides a stator. Figure 6 This is a schematic diagram of a stator provided in one embodiment of the present invention; Figure 7 This is a schematic diagram of slot insulation provided in an embodiment of the present invention; Figure 8 This is a partially enlarged schematic diagram of slot insulation provided in one embodiment of the present invention; Figure 9 This is a partially enlarged schematic diagram of the slot insulation provided in one embodiment of this utility model. For example... Figures 6 to 9As shown, the stator 100 includes: a stator core 10 with a plurality of stator teeth 11, and a stator slot 12 formed between two adjacent stator teeth 11; a slot insulator 30 is provided in the stator slot 12, the slot insulator 30 includes a hollow tubular portion 31 and a folded portion 32, the folded portion 32 is arranged circumferentially along the tubular portion 31 and is located at at least one end of the tubular portion 31, the folded portion 32 is located on the side of the tubular portion 31 away from the stator core 10, and the folded portion 32 is parallel to the axis of the tubular portion 31; a plurality of windings 20 are wound on the stator teeth 11, and part of the structure is located in the stator slot 12; the slot insulator 30 is located between the windings 20 and the stator teeth 11; a slot wedge 40 is provided in the stator slot 12 and is located between two adjacent windings 20, the end of the slot wedge 40 abuts against the end of the folded portion 32 facing the stator core 10.

[0051] By providing a folded portion 32 on the side of the tubular portion 31 away from the stator core 10, the end of the slot wedge 40 can abut against the end of the folded portion 32 facing the stator core 10. In this way, the folded portion 32 can restrict the movement of the slot wedge 40, making it difficult for the slot wedge 40 to come out of the stator slot 12, improving the stator yield, improving the reliability of the motor during operation, and reducing failures such as compressor stall and out-of-phase discharge.

[0052] Furthermore, such as Figure 8 As shown, the axial height of the folding part 32 is Z1, which satisfies: 3mm≤Z1≤5.5mm.

[0053] Furthermore, such as Figure 7 As shown, the total axial length of the tubular portion 31 is Z, and the total height of the stator core 10 is h (not shown in the figure), satisfying: h+5mm≤Z≤h+10mm. By limiting the axial height Z1 of the folded portion 32 and the relationship between the total height h of the stator core 10 and the total axial length Z of the tubular portion 31, the insulation strength at both ends of the stator core 10 at the stator slot opening is enhanced, especially in models with stepped cavities at both ends of the stator core.

[0054] Furthermore, such as Figure 10 As shown, the total length of the slot wedge 40 is L, which satisfies L≤Z-2Z1. By setting the relationship between the height of the slot wedge 40 and the height of the tubular part 31 and the folded part 32 of the slot insulation 30, good insulation effect between the windings 20 is ensured; and the folded part 32 can limit the vertical movement of the slot wedge 40.

[0055] Furthermore, such as Figure 10 and Figure 11 As shown, the slotted wedge 40 includes a first part 41 and a second part 42 connected to each other, and the slotted wedge 40 is V-shaped. Figure 6As shown, the V-shaped slot wedge 40 and the folded portion 32 are positioned as indicated by the dashed box, thus confining the slot wedge 40 by the folded portion 32 and preventing it from easily moving out of the stator slot 12. Further, as... Figure 11 As shown, the first part 41 has a first bent portion 43 on the side opposite to the second part 42, and the second part 42 has a second bent portion 44 on the side opposite to the first part 41. Figure 6 As shown, the first bend 43 and the second bend 44 can form a limit with the folded portion 32, thereby improving the limiting strength of the folded portion 32 on the groove wedge 40.

[0056] Furthermore, such as Figure 11 As shown, the width of both the first bend 43 and the second bend 44 is d, which satisfies: 0.5mm≤d≤2mm.

[0057] Furthermore, such as Figure 11 As shown, the first part 41 and the first bent part 43 form an angle θ1, and the second part 42 and the second bent part 44 form an angle θ2, satisfying: 45°≤θ1≤105°, 45°≤θ2≤105°. By setting the range of the width d of the first bent part 43 and the second bent part 44, and the range of the included angles θ1 and θ2, the limiting contact between the slot wedge 40 and the folded part 32 is strengthened.

[0058] This utility model embodiment also provides an electric motor, including a rotor and a stator 100 as described in any of the above technical solutions. The rotor and stator 100 are coaxially arranged and form an air gap fit. In this technical solution, the motor includes the stator 100 as described in any of the above technical solutions. Therefore, this motor has the advantages of the stator 100 in any of the above technical solutions and can achieve the technical effects that the stator 100 in any of the above technical solutions can achieve. Further details will not be elaborated here.

[0059] This utility model embodiment also provides a compressor, which includes the motor described in any of the above technical solutions. Therefore, the compressor possesses the advantages of the motor in any of the above technical solutions and can achieve the technical effects that the motor in any of the above technical solutions can achieve, which will not be elaborated here. The compressor can be specifically applied to refrigerators, air conditioners, freezers, or heat pump water heaters, etc.

[0060] In summary, the stator, motor, and compressor provided by this utility model have the following advantages:

[0061] By setting a folded part on the side of the tubular part away from the stator core, the end of the slot wedge abuts against the end of the folded part facing the stator core. In this way, the folded part can restrict the movement of the slot wedge, making it less likely for the slot wedge to come out of the stator slot, improving the stator yield, and improving the reliability of the motor during operation.

[0062] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications or substitutions should be considered within the protection scope of the present invention.

Claims

1. A stator, characterized in that, include: The stator core has multiple stator teeth, and stator slots are formed between two adjacent stator teeth. Slot insulation is provided in the stator slot. The slot insulation includes a hollow tubular part and a folded part. The folded part is arranged circumferentially along the tubular part and is located at at least one end of the tubular part. The folded part is located on the side of the tubular part away from the stator core, and the folded part is parallel to the axis of the tubular part. Multiple windings are wound around the stator teeth, and part of the structure is located within the stator slots; the slot insulation is located between the windings and the stator teeth; A slot wedge is disposed in the stator slot and located between two adjacent windings, with the end of the slot wedge abutting against the end of the folded portion facing the stator core.

2. The stator according to claim 1, characterized in that, The axial height of the folded part is Z1, which satisfies: 3mm≤Z1≤5.5mm.

3. The stator according to claim 2, characterized in that, The total axial length of the tubular section is Z, and the total height of the stator core is h, satisfying: h+5mm≤Z≤h+10mm.

4. The stator according to claim 3, characterized in that, The total length of the slot wedge is L, which satisfies L≤Z-2Z1.

5. The stator according to claim 1, characterized in that, The groove wedge includes a first part and a second part connected together, and the groove wedge is V-shaped.

6. The stator according to claim 5, characterized in that, The first part has a first bend on the side opposite to the second part, and the second part has a second bend on the side opposite to the first part.

7. The stator according to claim 6, characterized in that, The widths of both the first bend and the second bend are d, satisfying the condition: 0.5mm ≤ d ≤ 2mm.

8. The stator according to claim 6, characterized in that, The first part and the first bent part form an angle θ1, and the second part and the second bent part form an angle θ2, satisfying: 45°≤θ1≤105°, 45°≤θ2≤105°.

9. An electric motor, characterized in that, It includes a stator and a rotor as described in any one of claims 1 to 8, wherein the rotor is coaxially arranged with the stator and the rotor and the stator form an air gap fit.

10. A compressor, characterized in that, Includes the motor as described in claim 9.

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