Motor stator, motor and vehicle
By setting multiple slots in the motor stator and using a winding method with a specific span connection, the wiring process of the motor stator is simplified and the cost is reduced.
Patent Information
- Application Number
- CN202423320468.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The winding method of the motor stator is complex, with many types of wire spacing, which makes it easy to make mistakes in wire insertion and increases the manufacturing cost.
The stator core is circumferentially arranged with winding slots. Each slot has multiple layers of slots. The conductors of the three-phase windings are connected to the same or adjacent layers with a first span, and the connecting sections are connected with a second span, which simplifies the wiring process.
This reduces the span between conductors, simplifies the wiring process, and lowers wiring costs.
Smart Images
Figure CN223713670U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electric drive technology, and in particular to a motor stator, a motor, and a vehicle. Background Technology
[0002] With the rapid popularization of new energy vehicles, electric drive systems are developing rapidly towards higher power density, lower cost, higher integration, and higher efficiency. Under this trend, high power density requires motors with high power and compact size.
[0003] In related technologies, the electric drive system of new energy vehicles generally integrates a motor and a reducer. The output shaft of the motor cooperates with the reducer, so that the rotation of the motor output shaft is reduced by the reducer to output power. The motor can be an asynchronous motor, which includes a stator and a rotor. The stator is wound with flat wire windings, which have welded ends and hairpin ends. The winding method of the flat wire windings can be star or delta, and the flat wire windings have various different wire types and spans. The connection leads of the flat wire windings are located at the hairpin ends.
[0004] However, the winding method of the motor stator in the current electric drive system is complex, and there are many types of wire type and span, which poses a great challenge to the wire insertion process. Wire insertion is prone to errors and the process cost is high. Utility Model Content
[0005] This application provides a motor stator, a motor, and a vehicle to solve the problem in related technologies where the electronic stator in asynchronous electronics has many different types of card-issuing end spans and is prone to wiring errors.
[0006] In a first aspect, an embodiment of this application provides a motor stator, comprising:
[0007] The stator core has M winding slots arranged circumferentially on its inner wall, and each winding slot has N layers of slots arranged radially along the stator core.
[0008] A three-phase winding, each phase winding includes multiple coil windings and multiple connection segments. Each coil winding occupies N layers of slots. Each coil winding is formed by multiple conductors connected together, and the conductors are set in the slots.
[0009] In each coil winding, any conductor is connected to another conductor in the same or adjacent layer with a first span d1;
[0010] The connecting segment is connected between two adjacent coil windings with a second span d2, and the first span d1 is greater than the second span d2.
[0011] In one possible implementation, the motor stator provided in this application has a first span d1 that crosses the winding slots by one more than the second span d2.
[0012] In one possible implementation, the motor stator provided in this application has the following configuration: the number of winding slots M = 54, the number of slots N = 6 in each winding slot, and the number of pole pairs P = 3.
[0013] The first span d1 = 9, and the second span d2 = 8.
[0014] In one possible implementation, the motor stator provided in this application has a hairpin end and a welding end in each phase winding, with the hairpin end and welding end located at both ends of the stator core axially.
[0015] Each phase winding includes a lead wire and a star wire. The lead wire and the star wire are located at the same end of the stator core along the axial direction as the welding end. The winding slot where the lead wire is located and the winding slot where the star wire is located are separated by the third span d3.
[0016] In one possible implementation, the motor stator provided in this application has a third span d3 = 11.
[0017] In one possible implementation, the motor stator provided in this application has a first span d1 in which any conductor at the hairpin end of any phase winding is connected to another conductor in the same or adjacent layer.
[0018] At the welded end of any phase winding, any conductor is connected to another conductor in the adjacent layer with a first span d1.
[0019] In one possible implementation, the motor stator provided in this application has a connecting section located at the welded end.
[0020] In one possible implementation, the motor stator provided in this application has its three-phase windings connected in a star or delta configuration.
[0021] Secondly, an embodiment of this application provides an electric motor, including a motor body and a motor stator as described above, wherein the motor stator is disposed on the motor body.
[0022] Thirdly, an embodiment of this application provides a vehicle including a vehicle body and the aforementioned motor, the motor being mounted on the vehicle body.
[0023] This invention provides a motor stator, a motor, and a vehicle. The motor stator includes a stator core and three-phase windings. The inner wall of the stator core has M winding slots circumferentially arranged, each slot containing N layers of slots arranged radially along the stator core. Each phase winding of the three-phase windings includes multiple coil windings and multiple connecting segments. Each coil winding occupies N layers of slots, and each coil winding is formed by connecting multiple conductors, which are disposed within the slots. In each coil winding, any conductor is connected to another conductor in the same or adjacent layer with a first span d1; the connecting segment is connected between two adjacent coil windings with a second span d2. This reduces the span combinations between conductors in the three-phase windings, eliminates the need for long and short spans and cross-layer wires, simplifies the wiring process, and reduces wiring costs. Attached Figure Description
[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0025] Figure 1 This is a schematic diagram of the structure of a motor stator provided in an embodiment of this application;
[0026] Figure 2 This is a schematic diagram of the winding slot in the motor stator provided in an embodiment of this application;
[0027] Figure 3 A schematic diagram of the star connection of the three-phase windings in the motor stator provided in the embodiments of this application;
[0028] Figure 4 This is a schematic diagram of the delta connection of the three-phase windings in the motor stator provided in an embodiment of this application;
[0029] Figure 5 This is a schematic diagram of the structure of the hairpin coil provided in an embodiment of this application;
[0030] Figure 6 A schematic diagram of the parallel branch of the U-phase winding in a three-phase winding provided in this application embodiment at the card-starting end;
[0031] Figure 7 A schematic diagram of the parallel branch of the U-phase winding in a three-phase winding provided in this application embodiment at the welding end;
[0032] Figure 8 A schematic diagram of the parallel branch of the V-phase winding in the three-phase winding provided in this application embodiment at the card-starting end;
[0033] Figure 9 A schematic diagram of the parallel branch of the V-phase winding in a three-phase winding provided in this application embodiment at the welding end;
[0034] Figure 10 A schematic diagram of the parallel branch of the W-phase winding in a three-phase winding provided in this application embodiment at the card-starting end;
[0035] Figure 11 This is a schematic diagram of the parallel branch of the W-phase winding in a three-phase winding provided in an embodiment of this application at the welding end.
[0036] Explanation of reference numerals in the attached figures:
[0037] 10. Motor stator;
[0038] 100. Stator core; 101. Winding slot; 102. Slot position;
[0039] 200. Three-phase winding; 201. Conductor; 210. Hairpin end; 220. Welding end; 231. Lead wire; 232. Star wire; 240. Hairpin coil; 241. Leg; 242. Connecting part; 243. Bending part.
[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation
[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0042] The terms “first,” “second,” “third,” and “fourth,” etc. (if present), in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0043] As stated in the background section, an electric motor includes a stator and a rotor. The stator of the motor is wound with a flat wire winding, which has a welding end and a hairpin end. The winding method of the flat wire winding can be star or delta, and the flat wire winding has a variety of different wire types. The connection lead of the flat wire winding is located at the hairpin end.
[0044] However, the winding method of the motor stator in the current electric drive system is complex, and there are many types of opening end spans, which poses a great challenge to the wiring process. Wiring is prone to errors and the process cost is high.
[0045] To address the aforementioned problems in the existing technology, this utility model provides a motor stator, a motor, and a vehicle. The motor stator includes a stator core and three-phase windings. The inner wall of the stator core has M winding slots circumferentially arranged, each slot containing N layers of slots arranged radially along the stator core. Each phase winding of the three-phase winding includes multiple coil windings and multiple connecting segments. Each coil winding occupies N layers of slots, and each coil winding is formed by connecting multiple conductors, which are disposed within the slots. In each coil winding, any conductor is connected to another conductor in the same or adjacent layer with a first span d1; the connecting segment is connected between two adjacent coil windings with a second span d2. This reduces the span combinations between conductors in the three-phase windings, eliminates the need for long and short spans and cross-layer wires, simplifies the wiring process, and reduces wiring costs.
[0046] First, let's explain some terms used in motors:
[0047] The number of poles in a motor refers to the number of magnetic poles in the motor. Magnetic poles are divided into N poles and S poles. Generally, one N pole and one S pole are called a pair of magnetic poles, which means the number of pole pairs is 1. The number of pole pairs in a motor is 1, 2, 3, or 4, and the number of poles in a motor is 2, 4, 6, or 8.
[0048] Span refers to the number of slots occupied between two adjacent effective sides of a coil. Span is also called pitch, and the pitch value is expressed in slot count. It's important to note that the effective side refers to the portion of the coil winding located within the stator slots, which cuts the magnetic field and induces electromotive force within the stator slots. For example, if the number of slots occupied between two adjacent effective sides of a phase winding (e.g., the U-phase winding) is 6, then the pitch is 6. As another example, if the number of slots occupied between two adjacent effective sides of a phase winding (e.g., the U-phase winding) is 12, then the pitch is 12.
[0049] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.
[0050] Reference Figure 1 and Figure 2 As shown in the embodiment of this application, the motor stator 10 includes a stator core 100 and a three-phase winding 200. The inner wall of the stator core 100 is circumferentially provided with M winding slots 101, and each winding slot 101 has N layers of slot positions 102 arranged radially along the stator core 100. Each coil winding is formed by connecting multiple conductors 201, which are disposed within the slot positions 102.
[0051] In each coil winding, any conductor 201 is connected to another conductor 201 in the same or adjacent layer with a first span d1. The connecting segment connects two adjacent coil windings with a second span d2, where the first span d1 is greater than the second span d2.
[0052] It is understood that the three-phase winding 200 includes a U-phase winding, a V-phase winding, and a W-phase winding. Each phase winding can include multiple phase units. When connected, the phase units of the U-phase winding, the V-phase winding, and the W-phase winding are arranged periodically along the inner wall of the stator core 100. A phase unit can be formed by three adjacent winding slots 101. Each coil winding is formed by connecting multiple conductors 201, and each layer of slots 102 in each winding slot 101 contains one conductor 201. In each phase unit, all conductors 201 are in the same phase.
[0053] Among them, reference Figure 1 and Figure 2 As shown, any phase winding in the three-phase winding 200 may include a parallel branch, which connects the N layers of conductors 201 in the phase unit of that phase winding. In this parallel branch, the conductor 201 of any layer in a winding slot 101 is connected to the conductor 201 of the same or adjacent layer in another winding slot 101 at a first span distance. This reduces the span combinations between conductors 201 in the three-phase winding 200, eliminates the need for long and short spans and cross-layer wires, simplifies the wiring process, and reduces wiring costs.
[0054] In one embodiment, the conductors 201 in the same winding slot 101 are in phase. In this way, there is no need to install insulating paper between conductors 201 in different layers in the same winding slot 101, which can reduce the insulation cost of the motor.
[0055] For example, the number of winding slots 101 can be a natural number that is a multiple of 3 to correspond to three-phase windings 200, such as 48, 54, 72, etc. The number of slots 102 in each winding slot 101 is N, where N is an even number, such as 6, 8, 10, etc. The first span d1 and the second span d2 can be natural numbers such as 7, 8, 9, etc.
[0056] It should be noted that the three-phase winding 200 uses flat copper wire. Compared with traditional round copper wire winding, flat copper wire winding has a higher slot fill factor, so motors with flat copper wire winding can output higher power and torque for the same volume. The contact area between layers of winding is large, the contact between winding and stator slot is better, and the heat dissipation performance is better.
[0057] In one embodiment, the number of times the first span d1 crosses the winding groove 101 is one more than the number of times the second span d2 crosses the winding groove 101.
[0058] For example, the first span d1 can be 9, and the second span d2 can be 8.
[0059] In one specific embodiment, the number of winding slots 101 is M = 54, the number of slots 102 in each winding slot 101 is N = 6, and the number of pole pairs is P = 3.
[0060] The first span d1 = 9, and the second span d2 = 8.
[0061] Among them, the N-layer slots 102 are arranged radially along the stator core 100, the 6th layer slots 102 are close to the axis of the stator core 100, and the 1st layer slots 102 are away from the axis of the stator core 100.
[0062] For example, refer to Figure 2 , Figure 6 and Figure 7 As shown, in the parallel branch of the U-phase winding, the conductor 201 located in the sixth layer slot 102 of the first winding slot 101 is connected to the conductor 201 located in the sixth layer slot 102 of the tenth winding slot 101, that is, one conductor 201 is connected to another conductor 201 in the same layer with a first span (d1=9).
[0063] Continue to refer to Figure 2 , Figure 6 and Figure 7 As shown, the conductor 201 located in the 5th layer slot 102 of the 19th winding slot 101 is connected to the conductor 201 located in the 4th layer slot 102 of the 28 winding slots 101, that is, one conductor 201 is connected to another conductor 201 in the adjacent layer with a first span (d1 = 9).
[0064] The conductors 201 of the U-phase winding, W-phase winding, and V-phase winding are respectively threaded in different winding slots 101. In this way, the U-phase, W-phase, and V-phase are offset by a certain angle in the circumferential direction of the stator core 100, so that there is a certain electrical angle of lag or lead between adjacent phases.
[0065] It should be noted that the V-phase winding lags (clockwise) the U-phase winding by 120° electrical angle, and the W-phase winding leads (counterclockwise) the U-phase winding by 120° electrical angle. When the number of pole pairs P is 3, the mechanical angle is 40°.
[0066] In one embodiment, reference is made to... Figure 1 As shown, each phase winding has a hairpin end 210 and a welding end 220, which are located at the two ends of the stator core 100 along the axial direction.
[0067] Each phase winding includes a lead wire 231 and a star wire 232. The lead wire 231 and the star wire 232 are located at the same end of the stator core 100 along the axial direction as the welding end 220. The winding slot 101 where the lead wire 231 is located and the winding slot 101 where the star wire 232 is located are separated by a third span d3.
[0068] Understandably, referring to Figure 5 As shown, conductor 201 can be formed by hairpin coil 240, which includes leg 241 provided in winding groove 101 and connecting part 242 and bending part 243 provided outside winding groove 101. The connecting part 242 can be U-shaped or V-shaped. The leg 241 of hairpin coil 240 inserted in winding groove 101 forms flat wire conductor 201, the connecting part 242 forms hairpin end 210 of three-phase winding 200, and the bending part 243 forms welding end 220 of three-phase winding 200.
[0069] In this configuration, both lead-out wire 231 and star-point wire 232 are located at the same end of the stator core 100 along the axial direction as the welding end 220. This allows the wires to exit from the welding end 220, simplifying the wire insertion process. The winding slot 101 containing lead-out wire 231 of any phase winding and the winding slot 101 containing star-point wire 232 are both separated by a second span d2, which facilitates the connection of the three-phase windings 200.
[0070] In one embodiment, the third span d3 = 11.
[0071] For example, refer to Figures 6 to 11 As shown, in the U-phase winding, lead wire 231 is drawn from conductor 201 in the 6th slot 102 of the 1st winding slot 101, and star line 232 is drawn from conductor 201 in the 5th slot 102 of the 12th winding slot 101. In the V-phase winding, lead wire 231 is drawn from conductor 201 in the 6th slot 102 of the 7th winding slot 101, and star line 232 is drawn from conductor 201 in the 5th slot 102 of the 18th winding slot 101. In the W-phase winding, lead wire 231 is drawn from conductor 201 in the 6th slot 102 of the 13th winding slot 101, and star line 232 is drawn from conductor 201 in the 5th slot 102 of the 24th winding slot 101.
[0072] In one embodiment, at the hairpin end 210 of any phase winding, any conductor 201 is connected to another conductor 201 in the same or adjacent layer with a first span d1.
[0073] This reduces the span combination between conductors 201 in the three-phase winding 200, simplifies the wiring process, and reduces wiring costs.
[0074] For example, refer to Figure 2 and Figure 6 As shown, the solid line represents the wiring method of the card issuing end 210. The conductor 201 located in the sixth layer slot 102 of the first winding slot 101 is connected to the conductor 201 located in the sixth layer slot 102 of the tenth winding slot 101. That is, one conductor 201 is connected to another conductor 201 in the same layer with a first span (d1=9).
[0075] In one embodiment, at the welding end 220 of any phase winding, any conductor 201 is connected to another conductor 201 of the adjacent layer with a first span d1. This corresponds to the wiring method of the hairpin end 210, thereby reducing the span combination between conductors 201 in the three-phase winding 200.
[0076] For example, refer to Figure 2 and Figure 7 As shown, the dashed line represents the wiring method of the welding end 220. The conductor 201 located in the 6th slot 102 of the 10th winding slot 101 is connected to the conductor 201 located in the 5th slot 102 of the 19th winding slot 101.
[0077] In one embodiment, the connection segment may be provided at the welding end 220 to avoid affecting the connection of the conductor 201 at the card-off end 210.
[0078] In one embodiment, reference is made to... Figure 3 and Figure 4 As shown, the three-phase winding 200 is connected in a star or delta configuration.
[0079] In the above embodiments, the conductor 201 adopts the above connection method so that the three-phase winding 200 can be used for both star connection and delta connection, which can be selected according to the actual situation.
[0080] Among them, reference Figure 3 As shown, the leads 231 in each phase winding are connected to form terminals, and the star wires 232 in each phase winding are connected to form star contacts, thus forming a star connection. (Refer to...) Figure 4As shown, the lead 231 in one phase winding is connected to the star line 232 in another phase winding to form a delta connection. For example, the lead 231 of phase U is connected to the star line 232 of phase V, the lead 231 of phase V is connected to the star line 232 of phase W, and the lead 231 of phase W is connected to the star line 232 of phase U.
[0081] The following is a detailed explanation using a specific example of the winding of a 200-phase three-phase winding.
[0082] The 54 winding slots 101 are numbered from 1 to 54. The N layers of slots 102 within each winding slot 101 are defined as layer a, layer b, layer c, layer d, layer e, and layer f, where layer a is the first layer mentioned above, and layer f is the sixth layer mentioned above.
[0083] Please refer to Figures 6 to 11 The solid line represents the wiring method of the card-issuing end 210, and the dashed line represents the wiring method of the welding end 220. When the lead wire 231 and the star-dot wire 232 are both located at the same end of the stator core 100 as the welding end 220, the three-phase winding 200 is wound in the following manner:
[0084] Reference Figure 6 and Figure 7 As shown, the U-phase winding may include a parallel branch, with its starting end U1 corresponding to lead-out line 231 and its ending end X1 corresponding to star line 232. The winding method of the parallel branch of the U-phase winding is as follows:
[0085] First U-phase coil winding:
[0086] 1f-10f-19e-28d-37c-46b-1a-10a-1b-46c-37d-28e-
[0087] 19f-28f-37e-46d-1c-10b-19a-28a-19b-10c-1d-46e-
[0088] 37f-46f-1e-10d-19c-28b-37a-46a-37b-28c-19d-10e-
[0089] Second U-phase coil winding:
[0090] 2f-11f-20e-29d-38c-47b-2a-11a-2b-47c-38d-29e-
[0091] 20f-29f-38e-47d-2c-11b-20a-29a-20b-11c-2d-47e-
[0092] 38f-47f-2e-11d-20c-29b-38a-47a-38b-29c-20d-11e-
[0093] Third U-phase coil winding:
[0094] 3f-12f-21e-30d-39c-48b-3a-12a-3b-48c-39d-30e-
[0095] 21f-30f-39e-48d-3c-12b-21a-30a-21b-12c-3d-48e-
[0096] 39f-48f-3e-12d-21c-30b-39a-48a-39b-30c-21d-12e
[0097] Among them, 10e-2f and 11e-3f are two connecting segments, and the second span of the connecting segment is d2 = 8.
[0098] In the first U-phase coil winding, 1f-10f, 19e-28d, 37c-46b, 1a-10a, 1b-46c, and 37d-28e are the connection methods for conductor 201 in the hairpin end 210. 10f-19e, 28d-37c, 46b-1a, 10a-1b, and 46c-37d are the connection methods for conductor 201 in the welding end 220.
[0099] In the first U-phase coil winding, conductors 1f-10f and 1a-10a are connected to another conductor 201 in the same layer with a first span d1 = 9. Similarly, conductors 19e-28d, 37c-46b, 1b-46c, and 37d-28e are connected to another conductor 201 in an adjacent layer with a first span d1 = 9. Therefore, at the hairpin end 210, conductors 201 can be connected in four ways: layer a to layer a, layer b to layer c, layer d to layer e, and layer f to layer f. At the soldering end 220, conductors 201 can be connected in four ways: layer a to layer b, layer c to layer d, and layer e to layer f, corresponding to the connection methods at the hairpin end 210.
[0100] It is understandable that the first U-phase coil winding, the second U-phase coil winding, and the third U-phase coil winding are connected in sequence until the entire U-phase winding is completed.
[0101] It is understood that the parallel branch may include four types of hairpin coils 240, which are defined as the first type of hairpin coil 240, the second type of hairpin coil 240, the third type of hairpin coil 240 and the fourth type of hairpin coil 240, wherein all four types of hairpin coils 240 are U-shaped wires.
[0102] For example, the span of the first type of hairpin coil 240 is a first span d1 = 9, including 1a-10a, 19a-28a, 37a-46a, etc., spanning between layers a.
[0103] For example, the span of the second type of hairpin coil 240 is the first span d1 = 9, including 37c-46b, 19b-10c, 37b-28c, etc., which spans between layer b and layer c.
[0104] For example, the span of the third type of hairpin coil 240 is the first span d1 = 9, including 19e-28d, 37d-28e, 1d-46e, etc., which spans between the d layer and the e layer.
[0105] For example, the span of the fourth type of hairpin coil 240 is the first span d1 = 9, including 1f-10f, 19f-28f, 37f-46f, etc., spanning between f layers.
[0106] In this way, in the parallel branch of the U-phase winding, only the above four types of hairpin coils 240 are needed to complete the entire U-phase winding. This can reduce the span combination between conductors 201 in the U-phase winding, eliminating the need for long and short spans and cross-layer wires, and simplifying the wiring process.
[0107] Reference Figure 8 and Figure 9 As shown, the V-phase winding may include a parallel branch, the starting end V1 of which corresponds to lead 231, and the ending end Y1 which corresponds to star line 232. The winding method of the parallel branch of the V-phase winding is as follows:
[0108] First V-phase coil winding:
[0109] 7f-16f-25e-34d-43c-52b-7a-16a-7b-52c-43d-34e-
[0110] 25f-34f-43e-52d-7c-16b-25a-34a-25b-16c-7d-52e-
[0111] 43f-52f-7e-16d-25c-34b-43a-52a-43b-34c-25d-16e-
[0112] Second V-phase coil winding:
[0113] 8f-17f-26e-35d-44c-53b-8a-17a-8b-53c-44d-35e-
[0114] 26f-35f-44e-53d-8c-17b-26a-35a-26b-17c-8d-53e-
[0115] 44f-53f-8e-17d-26c-35b-44a-53a-44b-35c-26d-17e-
[0116] Third V-phase coil winding:
[0117] 9f-18f-27e-36d-45c-54b-9a-18a-9b-54c-45d-36e-
[0118] 27f-36f-45e-54d-9c-18b-27a-36a-27b-18c-9d-54e-
[0119] 45f-54f-9e-18d-27c-36b-45a-54a-45b-36c-27d-18e
[0120] Among them, 16e-8f and 17e-9f are two connecting segments, and the second span of the connecting segment is d2 = 8.
[0121] It is understandable that in the parallel branch of the V-phase winding, the connection method of the hairpin end 210 and the welding end 220 is the same as that of the U-phase winding, and the effect is the same, that is, it can reduce the span combination between conductors 201 in the V-phase winding, without the need for long and short spans and cross-layer wires, and the wiring process is simple, which will not be elaborated further here.
[0122] Reference Figure 10 and Figure 11 As shown, the W-phase winding may include a parallel branch, with its starting end W1 corresponding to lead-out line 231 and its ending end Z1 corresponding to star line 232. The winding method of the parallel branch of the W-phase winding is as follows:
[0123] First W-phase coil winding:
[0124] 13f-22f-31e-40d-49c-4b-13a-22a-13b-4c-49d-40e-
[0125] 31f-40f-49e-4d-13c-22b-31a-40a-31b-22c-13d-4e-
[0126] 49f-4f-13e-22d-31c-40b-49a-4a-49b-40c-31d-22e-
[0127] Second W-phase coil winding:
[0128] 14f-23f-32e-41d-50c-5b-14a-23a-14b-5c-50d-41e-
[0129] 32f-41f-50e-5d-14c-23b-32a-41a-32b-23c-14d-5e-
[0130] 50f-5f-14e-23d-32c-41b-50a-5a-50b-41c-32d-23e-
[0131] Third W-phase coil winding:
[0132] 15f-24f-33e-42d-51c-6b-15a-24a-15b-6c-51d-42e-
[0133] 33f-42f-51e-6d-15c-24b-33a-42a-33b-24c-15d-6e-
[0134] 51f-6f-15e-24d-33c-42b-51a-6a-51b-42c-33d-24e
[0135] Among them, 22e-14f and 23e-15f are two connecting segments, and the second span of the connecting segment is d2 = 8.
[0136] It is understandable that in the parallel branch of the W phase winding, the connection method of the hairpin end 210 and the welding end 220 is the same as that of the U phase winding, and the effect is the same, that is, it can reduce the span combination between conductors 201 in the W phase winding, without the need for long and short spans and cross-layer wires, and the wiring process is simple, which will not be elaborated further here.
[0137] An embodiment of this application provides an electric motor, including a motor body and a motor stator 10 as described above, wherein the motor stator 10 is disposed on the motor body.
[0138] The motor body includes a housing and a rotor. Both the rotor and the motor stator 10 are disposed inside the housing, and the rotor is disposed in the middle of the stator core 100 of the motor stator 10.
[0139] It should be noted that the motor provided in this application embodiment includes all the technical solutions and effects of the motor stator 10 described above, which will not be repeated here.
[0140] This application provides a vehicle including a vehicle body and a motor as described above, with the motor mounted on the vehicle body.
[0141] The vehicles provided in this application embodiment can be new energy vehicles, including but not limited to pure electric vehicles, hybrid electric vehicles, hydrogen fuel cell vehicles, etc., and this application embodiment does not specifically limit them.
[0142] The vehicle provided in this application embodiment has all the technical solutions and effects of the aforementioned motor, which will not be repeated here.
[0143] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.
[0144] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.
Claims
1. A motor stator, characterized in that, include: The stator core (100) has M winding slots (101) arranged circumferentially on its inner wall, and each winding slot (101) has N layers of slots (102) arranged radially along the stator core (100); A three-phase winding (200), wherein each phase of the winding includes multiple coil windings and multiple connecting segments, each coil winding occupies N layers of slots (102), and each coil winding is formed by multiple conductors (201) connected together, the conductors (201) being disposed in the slots (102); In each of the coil windings, any one of the conductors (201) is connected to another conductor (201) in the same or adjacent layer by a first span d1; The connecting segment is connected between two adjacent coil windings with a second span d2, and the first span d1 is greater than the second span d2.
2. The motor stator according to claim 1, characterized in that, The number of times the first span d1 crosses the winding groove (101) is one more than the number of times the second span d2 crosses the winding groove (101).
3. The motor stator according to claim 2, characterized in that, The number of winding grooves (101) is M=54, the number of slots (102) in each winding groove (101) is N=6, and the number of pole pairs is P=3; The first span d1 = 9, and the second span d2 = 8.
4. The motor stator according to claim 3, characterized in that, Each phase winding has a hairpin end (210) and a welding end (220), the hairpin end (210) and the welding end (220) being located at opposite ends of the stator core (100) along the axial direction; Each phase of the winding includes a lead wire (231) and a star wire (232). The lead wire (231) and the star wire (232) are located at the same end of the stator core (100) along the axial direction as the welding end (220). The winding slot (101) where the lead wire (231) is located and the winding slot (101) where the star wire (232) is located are separated by a third span d3.
5. The motor stator according to claim 4, characterized in that, The third span d3 = 11.
6. The motor stator according to claim 4, characterized in that, At the hairpin end (210) of any phase winding, any conductor (201) is connected to another conductor (201) in the same or adjacent layer with the first span d1; At the welded end (220) of any phase winding, any conductor (201) is connected to another conductor (201) of the adjacent layer with the first span d1.
7. The motor stator according to claim 6, characterized in that, The connecting section is disposed at the welding end (220).
8. The motor stator according to claim 4, characterized in that, The three-phase windings (200) are connected in a star or delta configuration.
9. An electric motor, characterized in that, It includes a motor body and a motor stator (10) as described in any one of claims 1 to 8, wherein the motor stator (10) is disposed on the motor body.
10. A vehicle, characterized in that, It includes a vehicle body and a motor as described in claim 9, wherein the motor is disposed on the vehicle body.