A stator assembly and electric machine

Abstract

The utility model provides a kind of stator assembly and motor, stator assembly includes: stator core, upper wire rack, lower wire rack and multi-phase winding, upper wire rack and lower wire rack are respectively arranged at the both ends of stator core, stator core, upper wire rack and lower wire rack are collectively formed around middle passage, the inside of middle passage is arranged with multiple winding parts;Line hanging part is provided on lower wire rack, line hanging part is arranged around middle passage, multiple wire passing grooves are provided on line hanging part;Multi-phase winding includes A-phase winding, B-phase winding and C-phase winding, A-phase winding includes multiple A-phase coils that are sequentially connected in series, B-phase winding includes multiple B-phase coils that are sequentially connected in series, C-phase winding includes multiple C-phase coils that are sequentially connected in series.Relative to prior art, the utility model's stator assembly bridge wire can be distributed in upper wire rack and lower wire rack, thereby avoiding the case that bridge wire stacking layer is too much occurs, and more conveniently automatic equipment is carried out winding operation, it is favorable to improve production efficiency.

Description

Technical Field

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

[0002] An electric motor (commonly known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. The basic structure of an electric motor mainly consists of two parts: a stator and a rotor. The stator is usually the stationary part, responsible for generating a magnetic field; the rotor is the rotating part, which generates mechanical energy through the interaction of magnetic fields.

[0003] The stator consists of a frame, stator core, winding structure, and other structural components that fix these parts. The frame is used to fix the core; for suspended generators, the frame bears the entire weight of the rotating parts. The core is part of the generator's magnetic circuit. The winding structure forms the generator's electrical circuit. Taking a three-phase winding as an example, currently, several coils for each phase winding are wound using a continuous copper wire, along with bridging wires connecting the coils. The coils and bridging wires are wound as a single unit.

[0004] Currently, the bridge wires on the stator are usually stacked on the same end of the stator. Sometimes, due to the excessive number of stacked layers and the axial space limitation of the wire frame, the bridge wires may become loose. Stacking bridge wires in multiple layers can easily lead to crossover and cause the outer diameter to exceed the tolerance. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and to provide a stator assembly and a motor.

[0006] One embodiment of this utility model provides a stator assembly, including: a stator core, an upper winding frame, a lower winding frame, and a multiphase winding. The upper winding frame and the lower winding frame are respectively disposed at both ends of the stator core. The stator core, the upper winding frame, and the lower winding frame together form a central channel. Multiple winding portions are arranged inside the central channel, and the multiple winding portions are evenly arranged around the central channel.

[0007] The lower wire rack is provided with a wire hanging part, which is arranged around the middle channel, and the wire hanging part is provided with multiple wire passing grooves;

[0008] The multiphase winding includes an A-phase winding, a B-phase winding, and a C-phase winding. The A-phase winding includes multiple A-phase coils connected in series. The B-phase winding includes multiple B-phase coils connected in series. The C-phase winding includes multiple C-phase coils connected in series. An upper bridging section connects at least two A-phase coils, at least two B-phase windings, and at least two C-phase windings. The upper bridging section is located on the side of the A-phase winding, B-phase winding, or C-phase winding closest to the upper wire frame. Different upper bridging sections are not connected in the axial direction of the intermediate channel. The lower bridging wires are connected between at least two A-phase coils, at least two B-phase windings, and at least two C-phase windings, either overlapping or partially overlapping. The lower bridging wires are located on the side of the A-phase winding, B-phase winding, or C-phase winding closer to the lower wire frame. The lower bridging wires do not overlap or partially overlap in the axial direction of the intermediate channel. The portions of the lower bridging wires are arranged on the side of the hanging section away from the intermediate channel. The two ends of the lower bridging wires pass through different hanging hooks and extend to different winding sections.

[0009] In some alternative embodiments, the upper wire rack is provided with three wire hanging terminals, the three wire hanging terminals are arranged around the central channel, and the wire hanging terminals are provided with wire hanging hook grooves.

[0010] The A-phase coil at the head end is connected to the A-phase start end, the A-phase coil at the tail end is connected to the X-ray end, the B-phase coil at the head end is connected to the B-phase start end, the B-phase coil at the tail end is connected to the Y-ray end, the C-phase coil at the head end is connected to the C-phase start end, and the C-phase coil at the tail end is connected to the Z-ray end. The A-phase start end and the Z-ray end are respectively located in the same hanging hook groove, the B-phase start end and the X-ray end are respectively located in the same hanging hook groove, and the C-phase start end and the Y-ray end are respectively located in the same hanging hook groove. The A-phase start end, the B-phase start end and the C-phase start end are located in different hanging hook grooves.

[0011] In some optional embodiments, the first end of phase A and the end of phase Z are welded to the hanging hook groove by spot welding, the first end of phase B and the end of phase X are welded to the hanging hook groove by spot welding, and the first end of phase C and the end of phase Y are welded to the hanging hook groove by spot welding.

[0012] In some alternative embodiments, the upper frame is provided with multiple mounting slots, and the hanging terminal is inserted into the mounting slots accordingly.

[0013] In some alternative embodiments, the hanging terminal is provided with two elastic mounting arms, with a clearance space between the two elastic mounting arms, and the two elastic mounting arms are inserted into the mounting groove.

[0014] In some alternative embodiments, the hanging terminal is provided with a curved hook plate located between the two resilient mounting arms, and the hook plate and the hanging terminal surround to form the hanging hook groove.

[0015] In some alternative embodiments, an extension ring is formed on the lower cable tray, the extension ring being arranged around the hanging cable portion, and in a projection direction parallel to the axial direction of the intermediate channel, the portion of the lower bridge cable portion located on the side of the hanging cable portion away from the intermediate channel is within the projection range of the extension ring.

[0016] In some alternative embodiments, the stator core has a plurality of protrusions formed on the inner side facing the intermediate channel;

[0017] The upper wire frame has a first connecting portion formed on the side facing the lower wire frame;

[0018] The lower wire frame has a second connecting portion formed on the side facing the upper wire frame;

[0019] The first connecting portion and the second connecting portion are interconnected, and the first connecting portion and the second connecting portion are arranged around the plurality of protrusions, and the protrusions, the first connecting portion and the second connecting portion are arranged to form a plurality of winding portions.

[0020] In some optional embodiments, when different upper bridge sections partially overlap, the number of overlapping layers of the upper bridge sections does not exceed two layers; when different lower bridge sections partially overlap, the number of overlapping layers of the lower bridge sections does not exceed two layers.

[0021] Another embodiment of the present invention provides an electric motor, including: a stator assembly as described above.

[0022] Compared with the prior art, the stator assembly of this utility model can have its bridge wires distributed on the upper and lower wire racks, thereby avoiding the situation of excessive stacking of bridge wires and making it easier for automated equipment to perform winding operations, which is conducive to improving production efficiency.

[0023] To provide a clearer understanding of this invention, the specific embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of one side of a stator assembly according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the other side of the stator assembly according to one embodiment of the present invention;

[0026] Figure 3 This is an exploded view of a stator assembly according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection of a multiphase winding according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a hanging terminal according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the upper frame structure according to an embodiment of the present utility model;

[0030] Figure 7 This is a schematic diagram of the lower frame structure according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Stator core; 11. Protrusion; 20. Upper wire frame; 21. Hanging terminal; 211. Hanging hook groove; 212. Mounting groove; 213. Flexible mounting arm; 214. Clearance space; 215. Hook plate; 22. First connecting part; 23. First groove; 30. Lower wire frame; 31. Hanging part; 32. Wire guide groove; 33. Extension ring; 34. Second connecting part; 35. Second groove; 40. Multiphase Winding; 41. Phase A winding; 411. Phase A coil; 412. Phase A start end; 413. X-line end; 42. Phase B winding; 421. Phase B coil; 422. Phase B start end; 423. Y-line end; 43. Phase C winding; 431. Phase C coil; 432. Phase C start end; 433. Z-line end; 44. Upper bridge section; 45. Lower bridge section; 50. Intermediate channel; 51. Winding section. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. In addition, unless otherwise stated, 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 indicated technical features.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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 or an electrical 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 utility model based on the specific circumstances.

[0036] In the description of this utility model, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. 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.

[0037] Please see Figures 1 to 4 This utility model provides a stator assembly, including: a stator core 10, an upper winding frame 20, a lower winding frame 30, and a multiphase winding 40. The upper winding frame 20 and the lower winding frame 30 are respectively disposed at both ends of the stator core 10. The stator core 10, the upper winding frame 20, and the lower winding frame 30 together form a middle channel 50. Multiple winding portions 51 are arranged inside the middle channel 50. The multiple winding portions 51 are evenly arranged around the middle channel 50.

[0038] The lower wire rack 30 is provided with a wire hanging part 31, which is arranged around the middle channel 50, and multiple wire passing grooves 32 are provided on the wire hanging part 31.

[0039] The multiphase winding 40 is connected in a delta configuration. The multiphase winding 40 includes an A-phase winding 41, a B-phase winding 42, and a C-phase winding 43. The A-phase winding 41 includes multiple A-phase coils 411 connected in series. The B-phase winding 42 includes multiple B-phase coils 421 connected in series. The C-phase winding 43 includes multiple C-phase coils 431 connected in series. An upper bridging section 44 connects at least two A-phase coils 411, at least two B-phase windings 42, and at least two C-phase windings 43. The upper bridging section 44 is located on the side of the A-phase winding 41, B-phase winding 42, or C-phase winding 43 closest to the upper wire frame 20. Different upper bridging sections 44... The coils 411 and 42 of phase A, phase B, and phase C are connected by a lower bridging section 45 in the axial direction of the intermediate channel 50. The lower bridging section 45 is located on the side of the A-phase winding 41, B-phase winding 42, or C-phase winding 43 closest to the lower wire frame 30. The lower bridging sections 45 do not overlap or partially overlap in the axial direction of the intermediate channel 50. Part of the lower bridging section 45 is arranged on the side of the hanging section 31 away from the intermediate channel 50. The two ends of the lower bridging section 45 pass through different hanging hook grooves 211 and then extend to different winding sections 51.

[0040] Because the upper and lower bridging wire sections 44 and 45 can be arranged on opposite sides of the multiphase winding 40, the accumulation of bridging wires on the same side of the multiphase winding 40, which would cause the dimensions to exceed specifications, is avoided. Furthermore, the upper and lower bridging wire sections 44 and 45 do not overlap, thus effectively controlling the outer diameter specifications. Moreover, this can be achieved through single-wire winding, facilitating winding operations and improving production efficiency.

[0041] Please see Figure 5 In some optional embodiments, the upper wire frame 20 is provided with three wire hanging terminals 21, which are arranged around the central channel 50. Each wire hanging terminal 21 has a wire hanging hook groove 211. The A-phase coil 411 at the head end is connected to the A-phase start end 412, the A-phase coil 411 at the tail end is connected to the X-ray end 413, the B-phase coil 421 at the head end is connected to the B-phase start end 422, the B-phase coil 421 at the tail end is connected to the Y-ray end 423, and the C-phase coil at the head end... 431 is connected to the C-phase start end 432, and the C-phase coil 431 at the tail end is connected to the Z-line end 433. The A-phase start end 412 and the Z-line end 433 are respectively set in the same hanging hook groove 211. The B-phase start end 422 and the X-line end 413 are respectively set in the same hanging hook groove 211. The C-phase start end 432 and the Y-line end 423 are respectively set in the same hanging hook groove 211. The A-phase start end 412, the B-phase start end 422 and the C-phase start end 432 are in different hanging hook grooves 211.

[0042] In this embodiment, since it is a single-wire winding, the beginning end of the A wire and the end end of the Z wire 433 are the beginning and end ends of the entire multi-phase winding 40. The beginning end of the B phase 422 and the end end of the X wire 413 are actually connected continuously as one piece, and the beginning end of the C phase 432 and the end end of the Y wire 423 are actually connected continuously as one piece.

[0043] In some optional embodiments, the A-phase start end 412 and the Z-line end 433 are spot-welded into the hanging hook groove 211, the B-phase start end 422 and the X-line end 413 are spot-welded into the hanging hook groove 211, and the C-phase start end 432 and the Y-line end 423 are spot-welded into the hanging hook groove 211. During spot welding, the insulation varnish layer of the multi-phase winding 40 can be directly melted and peeled off, thus eliminating the need for manual varnish removal, simplifying production operations and improving production efficiency.

[0044] To facilitate the installation of the hanging terminal 21, in some optional embodiments, the upper frame 20 is provided with multiple mounting slots 212, and a portion of the hanging terminal 21 is inserted into the mounting slot 212, thereby realizing the installation of the hanging terminal 21.

[0045] In some alternative embodiments, the hanging terminal 21 is provided with two elastic mounting arms 213, and a clearance space 214 is formed between the two elastic mounting arms 213. The two elastic mounting arms 213 are inserted into the mounting groove 212, and the elastic mounting arms 213 can elastically deform toward the clearance space 214. The elastic force of the elastic mounting arms 213 presses against the inner wall of the mounting groove 212, thereby keeping the two elastic mounting arms 213 inserted into the mounting groove 212.

[0046] To facilitate production, in some optional embodiments, a bent hook plate 215 is provided on the hanging terminal 21. The hook plate 215 is located between two elastic mounting arms 213. The hook plate 215 and the hanging terminal 21 surround each other to form a hanging hook groove 211. During production, the hook plate 215 can be cut off from the hanging terminal 21 and then bent to form the hanging hook groove 211. The original position of the hook plate 215 forms an avoidance space 214.

[0047] In some alternative embodiments, an extension ring 33 is formed on the lower wire frame 30, which is arranged around the hanging wire portion 31. In the projection direction parallel to the axial direction of the intermediate channel 50, the portion of the lower overpass wire portion 45 located on the side of the hanging wire portion 31 away from the intermediate channel 50 is within the projection range of the extension ring 33, so that in the radial direction of the intermediate channel 50, the extension ring 33 extends beyond the lower overpass wire portion 45, and when the stator assembly is installed inside the motor, the lower overpass wire portion 45 is less likely to abut against other structures inside the motor.

[0048] Please see Figure 6 and Figure 7 To improve the structural stability of the stator assembly, in some optional embodiments, the stator core 10 has multiple protrusions 11 formed on the inner side facing the intermediate channel 50; the upper wire frame 20 has a first connecting portion 22 formed on the side facing the lower wire frame 30; the lower wire frame 30 has a second connecting portion 34 formed on the side facing the upper wire frame 20; the first connecting portion 22 and the second connecting portion 34 are interconnected, and the first connecting portion 22 and the second connecting portion 34 are arranged around the multiple protrusions 11, forming multiple winding portions 51. In this embodiment, the first connecting portion 22 is provided with multiple first grooves 23, and the second connecting portion 34 is provided with multiple second grooves 35. The first annular groove and the second annular groove are connected, and the first groove 23 and the second groove 35 are correspondingly connected. The protrusions 11 are arranged in the first grooves 23 and the second grooves 35.

[0049] In some optional embodiments, when different upper bridge sections 44 partially overlap, the number of overlapping layers of the upper bridge sections 44 does not exceed two, thereby avoiding exceeding the outer diameter limit. When different lower bridge sections 45 partially overlap, the number of overlapping layers of the lower bridge sections 45 does not exceed two, thereby avoiding exceeding the outer diameter limit.

[0050] In some alternative embodiments, the upper wire frame 20 and / or the lower wire frame 30 are both wire frames made of insulating material, so that the hanging terminal 21 is energized with other structures in the motor because the upper wire frame 20 and / or the lower wire frame 30 are in contact with other structures in the motor.

[0051] The stator assembly described above can be used in a motor, which includes: the stator assembly described above.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stator assembly, characterized in that, include: The stator core, upper winding frame, lower winding frame, and multiphase winding are provided. The upper winding frame and the lower winding frame are respectively disposed at both ends of the stator core. The stator core, the upper winding frame, and the lower winding frame together form a middle channel. Multiple winding parts are arranged inside the middle channel. The multiple winding parts are evenly arranged around the middle channel. The lower frame is provided with a wire hanging part, which is arranged around the middle channel, and the wire hanging part is provided with multiple wire passage grooves; The multiphase winding includes an A-phase winding, a B-phase winding, and a C-phase winding. The A-phase winding includes multiple A-phase coils connected in series. The B-phase winding includes multiple B-phase coils connected in series. The C-phase winding includes multiple C-phase coils connected in series. Upper bridging sections are connected between at least two A-phase coils, at least two B-phase windings, and at least two C-phase windings. The upper bridging sections are located on the side of the A-phase winding, B-phase winding, or C-phase winding closest to the upper wire frame. Different upper bridging sections are connected in the axial direction of the intermediate channel. The lower bridging wires are connected between at least two A-phase coils, at least two B-phase windings, and at least two C-phase windings without overlapping or with partial overlap. The lower bridging wires are located on the side of the A-phase winding, B-phase winding, or C-phase winding closer to the lower wire frame. The lower bridging wires do not overlap or partially overlap with each other in the axial direction of the intermediate channel. The portions of the lower bridging wires are arranged on the side of the hanging section away from the intermediate channel. The two ends of the lower bridging wires pass through different hanging hook grooves and then extend to different winding sections.

2. A stator assembly according to claim 1, characterized in that: The upper wire rack is provided with three wire hanging terminals, which are arranged around the middle channel. Each wire hanging terminal is provided with a wire hanging hook groove. The A-phase coil at the head end is connected to the A-phase start end, the A-phase coil at the tail end is connected to the X-ray end, the B-phase coil at the head end is connected to the B-phase start end, the B-phase coil at the tail end is connected to the Y-ray end, the C-phase coil at the head end is connected to the C-phase start end, and the C-phase coil at the tail end is connected to the Z-ray end. The A-phase start end and the Z-ray end are respectively located in the same hanging hook groove, the B-phase start end and the X-ray end are respectively located in the same hanging hook groove, and the C-phase start end and the Y-ray end are respectively located in the same hanging hook groove. The A-phase start end, the B-phase start end and the C-phase start end are located in different hanging hook grooves.

3. A stator assembly according to claim 2, characterized in that: The beginning of phase A and the end of phase Z are welded to the hanging hook groove by spot welding. The beginning of phase B and the end of phase X are welded to the hanging hook groove by spot welding. The beginning of phase C and the end of phase Y are welded to the hanging hook groove by spot welding.

4. A stator assembly according to claim 2, characterized in that: The upper frame is provided with multiple mounting slots, and the hanging terminal is inserted into the mounting slots accordingly.

5. A stator assembly according to claim 4, characterized in that: The hanging terminal is provided with two elastic mounting arms, and a clearance space is formed between the two elastic mounting arms. The two elastic mounting arms are inserted into the mounting groove.

6. A stator assembly according to claim 5, characterized in that: The hanging terminal is provided with a curved hook plate, which is located between the two elastic mounting arms. The hook plate and the hanging terminal surround each other to form the hanging hook groove.

7. A stator assembly according to any one of claims 1 to 5, characterized in that: An extension ring is formed on the lower wire frame, and the extension ring is arranged around the hanging wire portion. In the projection direction parallel to the axial direction of the intermediate channel, the portion of the lower bridge wire portion located on the side of the hanging wire portion away from the intermediate channel is within the projection range of the extension ring.

8. A stator assembly according to any one of claims 1 to 5, characterized in that: The stator core has multiple protrusions on the inner side facing the central channel; The upper wire frame has a first connecting portion formed on the side facing the lower wire frame; The lower wire frame has a second connecting portion formed on the side facing the upper wire frame; The first connecting portion and the second connecting portion are interconnected, and the first connecting portion and the second connecting portion are arranged around the plurality of protrusions, and the protrusions, the first connecting portion and the second connecting portion are arranged to form a plurality of winding portions.

9. A stator assembly according to any one of claims 1 to 5, characterized in that: When different upper bridge sections partially overlap, the number of overlapping layers of the upper bridge sections shall not exceed two layers; when different lower bridge sections partially overlap, the number of overlapping layers of the lower bridge sections shall not exceed two layers.

10. An electric motor, characterized in that, include: A stator assembly as described in any one of claims 1 to 9.

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