CN212114942U - Motor stator and motor - Google Patents

Abstract

The utility model relates to the field of motors and discloses a motor stator and a motor, which comprises a stator core, a stator core and a motor, wherein the stator core is provided with a plurality of grooves; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; the stator core comprises a stator core, at least two phase windings, a plurality of conductor sections and a plurality of phase windings, wherein the at least two phase windings in each phase winding are sequentially connected in series along the circumferential direction of the stator core, each phase winding comprises a plurality of connecting parts positioned at two axial ends outside a stator core slot, each connecting part comprises an out-of-slot end part of a first conductor section and an out-of-slot end part of a second conductor section, and each conductor section comprises an in-slot part and two out-of-slot ends positioned at two axial ends outside the stator core; the utility model discloses an adopt single conductor section, realized a small amount of alternately of winding head, simplify manufacturing procedure, reduced manufacturing cost, improve machining efficiency.

Description

Motor stator and motor

Technical Field

The utility model relates to a motor field especially relates to a motor stator and motor.

Background

In the prior art, a stator winding comprises various conductors, wherein the various conductors comprise U-shaped conductors and conductor sections, and various conductor coils penetrate into a slot of a stator core according to a certain arrangement mode to form the required winding of a single-phase motor or a multi-phase motor. The hairpin coils used in the prior art are various, complex in arrangement mode, complex in manufacturing procedure, high in production cost and low in processing efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and motor through adopting single conductor section, has realized the intersection of a small amount of winding heads, simplifies manufacturing procedure, has reduced manufacturing cost, improves machining efficiency.

To achieve the purpose, the utility model adopts the following technical proposal:

an electric machine stator comprising:

a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase;

at least two branch windings in each phase winding are sequentially connected in series along the circumferential direction of the stator core, each phase winding comprises a plurality of connecting parts positioned at two axial ends outside a stator core slot, each connecting part comprises an out-slot end part of a first conductor section and an out-slot end part of a second conductor section, and each conductor section comprises an in-slot part and two out-slot end parts positioned at two axial ends outside the stator core slot and connected with the in-slot part; dividing each slot into M layers by the number of the slots which can be accommodated by each phase winding along the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3;

the plurality of connecting parts of each phase winding comprise a plurality of first connecting parts, the inside of the slot of the first conductor section of the plurality of first connecting parts and the inside of the slot of the second conductor section of the first connecting part are both positioned on the Mth radial layer of the stator core, and the pitches of the plurality of first connecting parts are different from the pitches of the other connecting parts positioned on the other radial layers of the stator core in the phase winding.

Furthermore, the extending directions of the outer ends of the slots of the phase windings, which are positioned on the same layer of the stator core slot outer diameter, are the same, and except for the outer end of the slot corresponding to the first connecting part of the stator core radial Mth layer, the extending directions of the outer ends of the slots of the phase windings, which are positioned on the two adjacent layers of the stator core slot outer diameter, are opposite.

Further, the pitch of the first connecting portion of the phase winding located at the mth layer in the radial direction of the stator core is a short pitch, and the pitch of the remaining connecting portions of the phase winding located at the remaining layers in the radial direction of the stator core is a full pitch.

Furthermore, the remaining connecting portions of each phase winding further include a plurality of connecting portions on the same layer, the interiors of the slots of the first conductor segments of the plurality of connecting portions on the same layer and the interiors of the slots of the second conductor segments of the connecting portions on the same layer are located on the first radial layer of the stator core, and the plurality of connecting portions on the same layer and the plurality of first connecting portions are located at two axial ends of the stator core.

Furthermore, the other connecting parts of each phase winding further comprise a plurality of adjacent layer connecting parts, the insides of the slots of the first conductor segments of the plurality of adjacent layer connecting parts and the insides of the slots of the second conductor segments of the connecting parts are located at two layers which are adjacent to each other in the radial direction of the stator core, and the insides of the slots of the adjacent layer connecting parts are located at the Nth layer and the (N + 1) th layer in the radial direction of the stator core, wherein N is an integer greater than or equal to 1.

Further, the same-layer connecting part is formed by connecting the outer ends of the grooves of the two different conductor segments, and the first connecting part is formed by connecting the outer ends of the grooves of the two different conductor segments.

Further, the adjacent layer connecting parts are formed by connecting the outer ends of the grooves of the same two conductor segments.

Furthermore, the inside of the slot of the conductor section connected with the outgoing line of each branch winding is located on the radial Mth layer of the stator core, and the inside of the slot and the first connecting parts are located at the same end of the stator core in the axial direction.

In order to achieve the above object, the present invention also provides a motor including the above motor stator.

Use the technical scheme of the utility model, a motor: a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core; a stator winding including a plurality of phase windings mounted on the stator core so as to be different from each other in electrical phase; the stator core comprises a stator core, at least two phase windings, a plurality of conductor sections and a plurality of phase windings, wherein the at least two phase windings in each phase winding are sequentially connected in series along the circumferential direction of the stator core, each phase winding comprises a plurality of connecting parts positioned at two axial ends outside a stator core slot, each connecting part comprises an out-of-slot end part of a first conductor section and an out-of-slot end part of a second conductor section, and each conductor section comprises an in-slot part and two out-of-slot ends positioned at two axial ends outside the stator core; dividing each slot into M layers by the number of the slots which can be accommodated by each phase winding along the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3; the plurality of connecting parts of each phase winding comprise a plurality of first connecting parts, the inside of the slot of the first conductor section of the plurality of first connecting parts and the inside of the slot of the second conductor section of the first connecting part are both positioned on the Mth radial layer of the stator core, and the pitches of the plurality of first connecting parts are different from the pitches of the other connecting parts positioned on the other radial layers of the stator core in the phase winding. By adopting the single conductor section, a small amount of crossing of the winding head is realized, the manufacturing procedure is simplified, the production cost is reduced, and the processing efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a motor stator according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of an axial side of a stator winding according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the other axial side of the stator winding according to the first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first conductor segment according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second conductor segment according to a first embodiment of the present invention;

fig. 6 is a partial structural schematic view of two adjacent slots in phase in the first embodiment of the present invention;

fig. 7 is a planar development view of a phase stator winding according to a first embodiment of the present invention;

FIG. 8 is a schematic diagram of an electrical connection in an embodiment of the present invention;

fig. 9 is another electrical connection schematic in an embodiment of the invention;

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not intended to limit a specific order. The embodiments of the present invention can be implemented individually, and can be implemented by combining each other between the embodiments, and the embodiments of the present invention are not limited to this.

The extending direction of A1A2 is parallel to the axial direction of the stator core, and the pitch is the interval between the inner part of one conductor segment and the inner part of another conductor segment along the circumferential direction; in the application, the extending direction of the outer end part of the slot positioned on the stator core is towards the left or the right, and the extending direction is the sequential direction of the inner part of the slot of the conductor section connected with the outer end part of the slot; it should be noted that the first layer is located in the radial direction of the stator core (i.e. the first layer in the direction close to the central axis of the stator core), and the mth layer is located in the radial direction of the stator core (i.e. the mth layer in the direction close to the central axis of the stator core); correspondingly, the first layer in the radial direction of the stator core (the first layer in the direction away from the central axis of the stator core is also possible) is positioned at the mth (i.e. the mth in the direction away from the central axis of the stator core) in the radial direction of the stator core.

As shown in fig. 1, an embodiment of the present invention provides a motor stator, including: a stator core 20 having a plurality of slots 21 formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

as shown in fig. 1 to 2, the stator winding 10 includes a plurality of phase windings mounted on a stator core 20 so as to be different from each other in electrical phase, wherein at least two branch windings of each phase winding are sequentially connected in series in a circumferential direction of the stator core.

Referring to fig. 1-2, in the stator winding 10 in the present embodiment, the stator winding 10 is mounted on the stator core 20, that is, a plurality of phase windings mounted on the stator core 20 so as to be different from each other in electrical phase, wherein the stator winding 10 is a three-phase (i.e., U-phase, V-phase, W-phase) winding, and each phase slot of each pole is 2 or more; each magnetic pole of the rotor is provided with two slots 21, the number of slots per pole per phase is 2 in the embodiment, the rotor has eight magnetic poles and is corresponding to each phase of the three-phase stator winding 10, the number of the slots 21 arranged in the stator core 20 is equal to 48 (namely, 2X8X3), as shown in fig. 7, one branch winding and the other branch winding in the U-phase winding are sequentially connected in series along the circumferential direction of the stator core respectively, one branch winding and the other branch winding in the V-phase winding are sequentially connected in series along the circumferential direction of the stator core respectively, and one branch winding and the other branch winding in the W-phase winding are sequentially connected in series along the circumferential direction of the stator core respectively; further, in the present embodiment, the stator core 20 is formed with two end faces 25, 26 in the axial direction of the stator core by laminating a plurality of annular magnetic steel plates in which a plurality of insulating papers are inserted, with the stator core 20 being defined by the adjacent two slots 21 by one tooth 22, it should be noted that other conventional metal plates may be used instead of the magnetic steel plates.

Illustratively, as shown in fig. 1, 2 and 3, in the present embodiment, each phase winding includes 40 connecting portions 100 at the axial 25 end of the stator core and 39 connecting portions 100 at the axial 26 end of the stator core, each connecting portion 100 is formed by connecting an out-slot end of a first conductor segment with an out-slot end of a second conductor segment, and each conductor segment 11(12) sequentially includes: an outer end 302 of the stator core at the outer end 25 of the stator core slot, an inner portion 301 of the stator core slot, and an outer end 303 of the stator core at the outer end 26 of the stator core slot, wherein the two outer ends 302 of the stator core slot are respectively connected with the inner portion 301 of the stator core slot at the outer ends of the stator core slot, i.e. a connection portion 100 at the outer axial 25 end of the stator core slot is formed by connecting a first conductor segment 11(12) at the outer axial 25 end of the stator core slot with a second conductor segment 11(12) at the outer axial 25 end of the stator core slot, and a connection portion 100 at the outer axial 26 end of the stator core slot is formed by connecting a first conductor segment 11(12) at the outer axial 26 end of the stator core slot with a second conductor segment 11(12) at the outer axial 26 end of the stator core slot with an outer end 302 of the stator core slot at the outer axial 26 end of the second conductor segment 11 (12);

illustratively, as shown in fig. 4, 5, 6, and 7, in the present embodiment, the phase winding is connected to the terminal (located in the axial extension direction of the fifth layer of the stator core) by the first out-of-slot end 303 of the second conductor segment 12 (or the first conductor segment 11) located in the fifth layer of the stator core in the radial direction, the first connection portion 100 is formed by connecting the second out-of-slot end 302 (located in the right extension direction of the fifth layer of the stator core in the radial direction) of the first conductor segment 12 (or the first conductor segment 11) located in the fifth layer of the stator core in the radial direction with the second out-of-slot end 302 (located in the left extension direction of the fourth layer of the stator core in the radial direction) of the second conductor segment 12 located in the fourth layer of the stator core located in the radial direction with the first out-of-slot end 303 (located in the right extension direction of the fourth layer of the stator core in the radial direction) of the second conductor segment 12 located in the third layer of the stator core The extending direction of the third layer in the radial direction of the core is leftward) is located at the outer 26 end of the stator core slot and connected to form a second connecting portion 100, the second outer slot end 302 of the second conductor segment 12 located at the third layer in the radial direction of the stator core (located at the right extending direction of the third layer in the radial direction of the stator core) is connected to the second outer slot end 302 of the second conductor segment 12 located at the second layer in the radial direction of the stator core (located at the left extending direction of the second layer in the radial direction of the stator core) and located at the outer 25 end of the stator core slot to form a third connecting portion 100, the first outer slot end 303 of the second conductor segment 12 located at the second layer in the radial direction of the stator core (located at the right extending direction of the second layer in the radial direction of the stator core) is connected to the outer 26 end of the stator core located at the first layer in the first conductor segment 11 located at the first layer in the radial direction of the, a fifth connecting part 100 is formed by connecting the second outer slot end 302 of the first conductor segment 11 positioned on the first layer of the stator core (positioned at the left of the extending direction of the radial first layer of the stator core) with the second outer slot end 302 of the second conductor segment 12 positioned on the first layer of the stator core (positioned at the right of the extending direction of the second virtual zero layer of the stator core) positioned at the outer 25 end of the stator core slot, and a sixth connecting part 100 is formed by connecting the first outer slot end 303 of the second conductor segment 12 positioned on the first layer of the stator core (positioned at the left of the extending direction of the radial first layer of the stator core) with the first outer slot end 303 of the second conductor segment 12 positioned on the second layer of the stator core (positioned at the right of the extending direction of the radial second layer of the stator core) positioned at the outer 26 end of the stator core; a seventh connecting part 100 is formed by connecting a second out-of-slot end 302 of the second conductor segment 12 positioned at the second layer of the stator core (positioned at the left of the extending direction of the second layer in the radial direction of the stator core) with a second out-of-slot end 302 of the second conductor segment 12 positioned at the third layer of the stator core (positioned at the right of the extending direction of the third layer in the radial direction of the stator core) positioned at the outer 25 end of the stator core slot; the eighth connecting part 100 is formed by connecting the first out-of-slot end 303 of the second conductor segment 12 positioned at the third layer of the stator core (positioned at the left in the extending direction of the third layer in the radial direction of the stator core) with the first out-of-slot end 303 of the second conductor segment 12 positioned at the fourth layer of the stator core (positioned at the right in the extending direction of the fourth layer in the radial direction of the stator core) positioned at the outer 26 end of the stator core slot; a ninth connecting part 100 is formed by connecting a second out-of-slot end 302 of the second conductor segment 12 positioned at the fourth layer of the stator core (positioned at the left of the extending direction of the fourth layer in the radial direction of the stator core) with a second out-of-slot end 302 of the second conductor segment 12 positioned at the fifth layer of the stator core (positioned at the right of the extending direction of the fifth layer in the radial direction of the stator core) positioned at the outer 25 end of the stator core slot; a tenth connecting part 100 (a first connecting part 110A) is formed by connecting a first out-of-slot end 303 of a first conductor segment 11 positioned at a fifth layer of the stator core (positioned at the right of the extending direction of a radial sixth virtual layer of the stator core) with a first out-of-slot end 303 of a second conductor segment 12 positioned at the fifth layer of the stator core (positioned at the left of the extending direction of the radial fifth layer of the stator core) positioned at the outer 26 end of the stator core slot; thus, a cycle of the phase winding from the lead end of the fifth layer in the radial direction of the stator core to the first layer in the radial direction of the stator core and then from the first layer in the radial direction of the stator core to the fifth layer in the radial direction of the stator core is completed, as shown in fig. 7, the phase winding path has eight loops, the eight loops are arranged at corresponding positions of different slots in the same layer, the eleventh connecting part 100 is formed by connecting the second out-of-slot end 302 of the second conductor segment 12 located in the fifth layer in the radial direction of the stator core from the first loop to the second loop from the second out-of-slot end 302 of the second conductor segment 12 located in the fourth layer of the stator core to the end 25 located outside the stator core slot, and the eleventh connecting part 100 is connected in the same manner as the first connecting part 100 in combination with fig. 7, except that the eleventh connecting part 100 and the first connecting part 100 are located in the same layer in different, the twelfth connecting portion 100 is in the same manner as the second connecting portion 100, and further description is omitted here, so that it can be seen that the U-phase winding includes 40 connecting portions 100 located at the outer axial 25 end of the stator core slot and 39 connecting portions 100 located at the outer axial 26 end of the stator core slot.

Further, as shown in fig. 7, in the first embodiment, the 79 connecting portions of the phase winding (U-phase winding) further include 8 first connecting portions 110A (or 7 first connecting portions +1 lead-out wire ends), the in-slot portions 301 of the first conductor segments 11 of the first connecting portions 110A and the in-slot portions 301 of the second conductor segments 12 are located in the mth layer of the stator core, the embodiment M is 5, the pitch of the 8 first connecting portions 110A located in the mth layer of the stator core in the radial direction is a short pitch (the short pitch is 5 in the embodiment), the first connecting portions 110A are formed by connecting the second out-slot portions 302 of the second conductor segments 12 located in the mth layer of the stator core with the second out-slot portions 302 of the first conductor segments 11 located in the mth layer of the stator core at the 25 end of the stator core, and the second out-slot portions 302 of the connected first conductor segments 11 correspond to the in-slot portions 301 (the first slot located in the mth layer of the stator core in the radial direction) and the second conductor segments 12 of the stator core at the second out-slot portions 302 The pitch between the slot inner portions 301 corresponding to the two slot outer ends 302 (the 36 th slot located at the mth layer in the radial direction of the stator core) is 5, that is, the pitch between the slot outer ends corresponding to the first connection portion 110A is 5, the pitch between the outer ends of the slots corresponding to the other connection portions 100 of the U-phase winding is 6, as shown in fig. 7, the pitch between the outer ends of the slots corresponding to the other connecting portions 100 is 6 (the pitch between the inner portion of the slot (e.g., the 30 th slot of the stator core) corresponding to the first outer end 302(303) of any connecting portion of the other layers except the mth layer in the radial direction of the stator core and the second outer end 302(303) connected to the inner portion of the slot (e.g., the 36 th slot of the stator core) corresponding to the second outer end 302(303), as shown in fig. 7, the extending slot pitch of the outer ends of the slots of the other conductor segments 11, 12 in the circumferential direction is 3 except the conductor segment corresponding to the first connecting portion 110A, i.e. the pitch 5 of the first connection 110A of the U-phase winding is different from the pitch 6 of the other connections in the U-winding.

With reference to fig. 1 to 6, in the present embodiment, each phase winding divides each slot into M layers by the number of the inside of the slot that can be accommodated in the radial direction of the stator core 20, where M is an odd number equal to or greater than 3; with reference to fig. 7, in the present embodiment, each phase winding divides each slot into 5 layers along the number of the slots accommodated in the stator core, that is, M is 5, but M may also be 3, that is, the conductor segments 12 located at the second layer and the third layer in the radial direction of the stator core may be eliminated accordingly. By adopting the single conductor sections 11 and 12, a small amount of crossing of the winding heads is realized, the manufacturing process is simplified, the production cost is reduced, and the processing efficiency is improved.

For example, as shown in fig. 7, in this embodiment, the extending directions of the outer ends 303 of the U-phase windings located in the first layer of the stator core axial 26 end slot outer diameter direction are all leftward, the extending directions of the outer ends 302 of the U-phase windings located in the first layer of the stator core axial 25 end slot outer diameter direction are all leftward, and the extending directions of the outer ends 302 of the U-phase windings located in the second layer of the stator core axial 25 end slot outer diameter direction are all rightward, (or the extending directions of the outer ends 303 of the U-phase windings located in the first layer of the stator core axial 26 end slot outer diameter direction are all leftward, the extending directions of the outer ends 302 of the U-phase windings located in the first layer of the stator core axial 25 end slot outer diameter direction are all rightward, and the extending directions of the outer ends 302 of the U-phase windings located in the second.

Except for the outer slot end part corresponding to the first connecting part 110A positioned on the first radial layer of the stator core 20, the extending directions of the outer slot end parts 303 positioned on the 26 axial end of the stator core and positioned on the second radial layer of the stator core are all right, the extending directions of the outer slot end parts 303 positioned on the 26 axial end of the stator core and positioned on the third radial layer of the stator core are all left, the extending directions of the outer slot end parts 303 positioned on the 26 axial end of the stator core and positioned on the fourth radial layer of the stator core and positioned on the 26 axial end of the stator core and positioned on the fifth radial layer of the stator core are all right, the extending directions of the outer slot end parts 303 positioned on the 26 axial end of the stator core and positioned on the sixth virtual layer of the outer slot end parts 303 axial layer of the stator core are all left, the outer slot end parts 302 positioned on the 25 axial end of the stator core and positioned on the second radial layer of the stator core and positioned on the third radial layer of the stator core are all right, and the extending directions of the, the extending directions of the outer ends 302 of the slots at the 25 axial end of the stator core and at the fifth radial layer are all towards the right, that is, except the outer ends of the slots corresponding to the first connecting part 110A at the first radial layer of the stator core 20, the extending directions of the outer ends of the slots at the two adjacent radial layers of the stator core slots 21 in the phase winding are opposite.

Illustratively, as shown in fig. 2, 3, 4, 5, and 7, in the embodiment, the remaining connection portions 100 of (U) in each phase of winding include a plurality of same-layer connection portions 110B, the interiors of the slots of the first conductor segments 11 and the interiors of the slots of the second conductor segments 12 of the same-layer connection portions 110B are located in the same layer in the radial direction of the stator core (as the fifth connection portions 100 described above), as shown in fig. 7, the interiors of the slots of the same-layer connection portions 110B corresponding to the two conductor segments are located in the first layer in the radial direction of the stator core, the same-layer connection portions 110B are located at the axial 25 end of the stator core, and the first connection portions 110A are located at the axial.

Further, as shown in fig. 2, 3, 5, and 7, the remaining plurality of connection portions 100 in each phase winding (U) further includes adjacent layer connection portions 120, where the in-slot portions 301 of the first second conductor segment 12 of the adjacent layer connection portion 120 and the second conductor segment 12 of the connection portion are located in radially adjacent layers of the stator core, as shown in fig. 7, the in-slot portions 301 of the adjacent layer connection portions 120 are located in the nth layer and the N +1 th layer, where N is greater than or equal to 1, that is, the two out-slot portions 302(303) connected by the adjacent layer connection portions 120 may be located in the in-slot portions 301 corresponding to the first layer and the second layer (e.g., the sixth connection portion 100) in the radial direction of the stator core, may be located in the second layer and the third layer (e.g., the seventh connection portion 100) in the radial direction of the stator core, may be located in the third layer and the fourth layer (e.g, A fifth layer (e.g., the ninth connection 100 described above).

Further, as shown in fig. 1 to 7, the same-layer connecting portion 110B located in the first radial layer of the stator core is formed by connecting the outer slot end of the first conductor segment 11 with the outer slot end of the second conductor segment 12, and the first connecting portion 110A located in the mth radial layer of the stator core is formed by connecting the outer slot end of the first conductor segment 11 with the outer slot end of the second conductor segment 12, that is, the same-layer connecting portion and the first connecting portion are formed by connecting the outer slot ends of two different conductors; the adjacent layer connecting part 120 located at the first layer, the second layer or the second layer, the third layer or the third layer, the fourth layer or the fourth layer and the fifth layer in the radial direction of the stator core is formed by connecting the out-of-slot end of the first second conductor segment 12 with the out-of-slot end of the second conductor segment 12, that is, the adjacent layer connecting part is formed by connecting the out-of-slot ends of the same two conductor segments 12.

As shown in fig. 7, in the present embodiment, the inside of the slot of the conductor segment to which the lead end or the outlet end of each branch winding is connected may be located at the mth layer in the radial direction of the stator core and at the 26-end in the axial direction of the stator core, that is, at the same axial end as the first connection portion.

Illustratively, as shown in fig. 8, the U-phase conductor lead end has a U phase, the V-phase conductor lead end has a V-phase terminal, the W-phase conductor lead end has a W-phase terminal, and the U-phase conductor lead end, the V-phase conductor lead end, and the W-phase conductor lead end adopt connectors to perform neutral point connection, that is, to complete the star connection of the 2-branch windings of the odd-numbered motor in series, as shown in fig. 9, the U-phase conductor lead end is connected to the V-phase conductor lead end, the V-phase conductor lead end is connected to the W-phase conductor lead end, and the W-phase conductor lead end is connected to the U-phase conductor lead end, that is, to complete the delta connection of the 2-branch windings of the odd.

The embodiment also provides a motor, which comprises the motor stator, and the motor adopting the motor stator can reduce the production cost and improve the production efficiency.

The utility model discloses in every utmost point every looks slot number the stator slot number/motor pole number/looks number, the pole distance the stator slot number/motor pole number every utmost point every looks slot number the looks number, the quantity in groove is not limited only 48 grooves, can also be the groove of other quantity, for example: the number of slots of each phase of each pole is 2, the corresponding slot poles of the three-phase motor are matched with a 6-pole 36 slot, a 8-pole 48 slot, a 10-pole 60 slot, a 12-pole 72 slot, a 16-pole 96 slot and the like, and the pole distance is 6; the number of slots of each phase of each pole is 3, and the corresponding three-phase motor slot poles are matched with a 6-pole 54 slot, an 8-pole 72 slot, a 10-pole 90 slot, a 12-pole 108 slot, a 16-pole 144 slot and the like, which are not limited one by one.

The embodiment of the utility model provides a motor includes the motor stator in above-mentioned embodiment, consequently the embodiment of the utility model provides a motor also possesses the beneficial effect that the above-mentioned embodiment described, no longer gives unnecessary details here.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; they may be mechanically or electrically connected, directly or indirectly through intervening media, or may be interconnected between two elements. The above-described meaning of what is specifically intended in the present invention can be understood in specific instances by those of ordinary skill in the art. Finally, it should be noted that the above description is only a preferred embodiment of the present invention and the technical principles applied.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (9)

1. An electric machine stator comprising:

a stator core having a plurality of slots formed on a radially inner surface thereof and spaced apart at predetermined slot pitches in a circumferential direction of the stator core;

a stator winding including a plurality of phase windings mounted on the stator core so as to be different in electrical phase from each other;

the stator core structure is characterized in that at least two branch windings in each phase winding are sequentially connected in series along the circumferential direction of the stator core, each phase winding comprises a plurality of connecting parts positioned at two axial ends outside a stator core slot, each connecting part comprises an out-of-slot end part of a first conductor section and an out-of-slot end part of a second conductor section, and each conductor section comprises an in-slot part and two out-of-slot end parts positioned at two axial ends outside the stator core slot and connected with the in-slot part; dividing each slot into M layers by the number of the phase windings in the slots which can be accommodated along the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3;

the plurality of connecting parts of each phase winding comprise a plurality of first connecting parts, the inside of a slot of a first conductor section of the plurality of first connecting parts and the inside of a slot of a second conductor section of the first connecting part are both positioned on the Mth radial layer of the stator core, and the pitches of the plurality of first connecting parts are different from the pitches of the other connecting parts positioned on the other radial layers of the stator core in the phase winding.

2. The stator according to claim 1, wherein the outer ends of the phase windings on the same radial layer of the stator core slot have the same extending direction, and the outer ends of the phase windings on the adjacent two radial layers of the stator core slot have the opposite extending direction except the outer end of the slot corresponding to the first connecting portion on the mth radial layer of the stator core.

3. The stator according to claim 1, wherein the first connection portion of the phase winding located in the mth layer in the radial direction of the stator core has a short pitch, and the remaining connection portions of the phase winding located in the remaining layers in the radial direction of the stator core have a full pitch.

4. The stator according to claim 3, wherein the remaining connection portions of each of the phase windings further include a plurality of same-layer connection portions, an inside of a slot of a first conductor segment of the plurality of same-layer connection portions and an inside of a slot of a second conductor segment of the connection portions are located in a first radial layer of the stator core, and the plurality of same-layer connection portions and the plurality of first connection portions are located at both axial ends of the stator core.

5. The stator according to claim 4, wherein the remaining connection portions of each of the phase windings further include a plurality of adjacent connection portions, an inside of a slot of a first conductor segment of the plurality of adjacent connection portions is located at two radially adjacent layers of the stator core from an inside of a slot of a second conductor segment of the connection portion, and an inside of a slot of the adjacent connection portion is located at an nth layer, N +1 layer, in a radial direction of the stator core, where N is an integer greater than or equal to 1.

6. The stator according to claim 4, wherein the same-layer connecting portion is formed by connecting the out-of-slot portions of two different conductor segments, and the first connecting portion is formed by connecting the out-of-slot portions of two different conductor segments.

7. The stator according to claim 5, wherein the adjacent layer connecting portions are formed by connecting outer-slot ends of the same two conductor segments.

8. The stator according to claim 1, wherein the conductor segments connected to the outgoing lines of each of the branch windings are located inside slots of the mth radial layer of the stator core and at the same axial end of the stator core as the plurality of first connections.

9. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 8.

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