CN211908497U - 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 core, wherein the stator core is provided with a plurality of grooves which are formed on the radial inner surface of the stator core and are spaced at preset groove intervals along the 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; the utility model discloses a U-shaped conductor's that adopts the kind is few, and the mode of arranging is simple, has cancelled each alternate busbar, has realized each alternate interior lug connection, has reduced the preparation technology complexity, has reduced manufacturing cost, has reduced material cost, has improved 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

The stator winding comprises a plurality of hairpin coils, and the hairpin coils penetrate into the slots of the stator core according to a certain arrangement mode to form the winding of the required single-phase motor or multi-phase motor. The hairpin coils used in the prior art are various, the arrangement mode is complex, a large number of bus bars and bus bars are needed to be used for connecting branches and neutral points of windings of each phase, the manufacturing process is complex, the production cost is high, and the processing efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor stator and motor, the type of the U-shaped conductor of adoption is few, and the mode of arranging is simple, has cancelled each alternate busbar, has realized each alternate interior lug connection, has reduced the preparation technology complexity, has reduced manufacturing cost, has reduced material cost, has improved 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 conductors, and each conductor comprises two slot interiors which are used for being inserted into different slots; each conductor also comprises a slot outer end part which is positioned at one end outside the stator core slot and used for connecting the inner parts of the two slots, and the slot pitch of the outer end part of the tail end slot of one branch winding in the phase winding, which is connected with the outer end part of the head end slot of the other branch winding, is different from the slot pitch of the outer end part of the other connected slots in the phase winding; dividing each slot into M layers according to the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3;

the pitch of one part of the conductors in the first layer in the radial direction of the stator core is larger than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding.

Further, one conductor in one part of the plurality of conductors located on the first layer in the radial direction of the stator core and one conductor in the other part of the plurality of conductors are located in the adjacent slots of the stator core, and one conductor in one part of the conductors surrounds one conductor in the other part.

Further, when M is greater than or equal to 5, the pitches of the plurality of conductors located in the second layer and the third layer in the radial direction of the stator core are equal to the pole pitch of the stator winding, and the pitches of the plurality of conductors located in the fourth layer and the fifth layer in the radial direction of the stator core are equal to the pole pitch of the stator winding.

Further, when M is greater than or equal to 5, the pitch of the plurality of conductors located in the second layer and the third layer in the radial direction of the stator core is equal to the pole pitch of the stator winding, the pitch of a part of the plurality of conductors located in the fourth layer and the fifth layer in the radial direction of the stator core is greater than the pole pitch of the stator winding, and the pitch of another part of the plurality of conductors is smaller than the pole pitch of the stator winding.

When M is larger than or equal to 5, the pitch of one part of the conductors in the second layer and the third layer in the radial direction of the stator core is larger than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding; the pitch of the plurality of conductors positioned on the fourth layer and the fifth layer in the radial direction of the stator core is equal to the pole pitch of the stator winding.

When M is larger than or equal to 5, the pitch of one part of the conductors in the second layer and the third layer in the radial direction of the stator core is larger than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding; the pitch of one part of the conductors in the fourth layer and the fifth layer in the radial direction of the stator core is larger than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding.

Further, when M is greater than 5, the pitches of the plurality of conductors located on the N-1 th layer and the N-th layer in the radial direction of the stator core are the same as those of the plurality of conductors located on the second layer and the third layer in the radial direction of the stator core, where N is an integer smaller than M.

Furthermore, each conductor also comprises an outside-slot bending part which is positioned at one end of the stator core and connected with the insides of the two slots, and the extending directions of the outside-slot bending parts of two adjacent conductors in the same phase are the same; the outer end part of each groove connected with the inner part of each groove of each conductor of the fourth layer and the fifth layer in the radial direction of the stator core is positioned on the same layer with the inner part of the groove; the outer end parts of the slots on the same layer are the same along the extension direction of the stator core, and the outer end parts of the slots on two adjacent layers are opposite in distribution direction along the circumferential direction of the stator core.

Furthermore, among the plurality of conductors positioned on the fourth layer and the fifth layer of the stator core in the radial direction, the outer end part of a slot connected with the inner part of the slot positioned on the fourth layer of the stator core in the radial direction is positioned on the same layer with the inner part of the slot; the outer end parts of partial slots connected with the inner part of the slot positioned at the fifth layer of the stator core in the radial direction are positioned at the same layer with the inner part of the slot, and the outer end parts of other slots connected with the inner part of the slot positioned at the fifth layer of the stator core in the radial direction extend from the layer where the inner part of the slot is positioned to one side far away from the fourth layer of the stator core in the radial direction; the outer end portions of the slots on the same layer are identical in extension direction along the circumferential direction of the stator core, and the outer end portions of the slots on two adjacent layers are opposite in extension direction along the circumferential direction of the stator core.

Furthermore, the leading-out wire of each branch winding is positioned on the innermost winding layer or the outermost winding layer. In order to achieve the above object, the present invention also provides a motor including the above motor stator. Applications of

The technical scheme of the utility model, a motor stator and 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; 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 conductors, and each conductor comprises two slot interiors which are inserted into different slots; each conductor also comprises a slot outer end part which is positioned at one end outside the stator core slot and used for connecting the inner parts of the two slots, and the slot pitch of the outer end part of the tail end slot of one branch winding in the phase winding, which is connected with the outer end part of the head end slot of the other branch winding, is different from the slot pitch of the outer end part of the other connected slots in the phase winding; dividing each slot into M layers according to the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3; the pitch of one part of the conductors in the first layer in the radial direction of the stator core is larger than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding. The adopted U-shaped conductors are few in types and simple in arrangement mode, all interphase busbars are omitted, direct connection between the interphase conductors and the inside conductors is achieved, complexity of a manufacturing process is reduced, production cost is reduced, material cost is reduced, and machining 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 diagram of a stator winding according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a plurality of conductors in a radial first layer of a stator core according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first large conductor forming a radial first layer of a stator core in a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first small conductor forming a radial first layer of a stator core according to a first embodiment of the present invention;

fig. 6 is a schematic structural view of a plurality of radial conductors on the second layer and the third layer of the stator core according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second conductor forming a radial second layer and a radial third layer of the stator core in the first embodiment of the present invention;

fig. 8 is a schematic structural view of a plurality of conductors in the fourth layer and the fifth layer in the radial direction of the stator core according to the first embodiment of the present invention;

fig. 9 is a schematic structural diagram of a fourth conductor forming a radial fourth layer and a radial fifth layer of the stator core in the first embodiment of the present invention;

FIG. 10 is a partial schematic view of two adjacent grooves according to an embodiment of the present invention;

fig. 11 is a partial structure schematic view of two same-phase adjacent slots according to the embodiment of the present invention;

fig. 12 is a partial structure schematic view of two adjacent slots in three same phases according to an embodiment of the present invention;

fig. 13 is a planar development view of a phase stator winding according to a first embodiment of the present invention;

fig. 14 is a planar development view of a stator winding of one phase in the fourth embodiment of the present invention;

fig. 15 is a schematic diagram of an electrical connection in an embodiment of the invention;

fig. 16 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.

In the present application, the slot pitch is the interval between two slot inner portions 301 of the conductor along the circumferential direction, and the pitch is the interval between the two slot inner portions 301 of the conductor along the circumferential direction; it should be noted that, in the present application, the extension direction of the out-of-slot turning portion along the circumferential direction of the stator core is the extension direction along the circumferential direction of the stator core from the first slot inner portion 301 of the U-shaped conductor to the second slot inner portion 302 of the U-shaped conductor; the first layer is positioned in the radial direction of the stator core (namely the first layer close to the central axis direction of the stator core), and the M-1 th layer and the M-th layer are positioned in the radial direction of the stator core (namely the M-1 th layer and the M-th layer close to the central axis direction of the stator core); correspondingly, the first layer is positioned in the radial direction of the stator core (the first layer can also be far away from the central axis direction of the stator core), and the (M-1) th layer and the (M) th layer are positioned in the radial direction of the stator core (namely, the (M-1) th layer and the (M) th layer are positioned away from the central axis 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; two slots 21 are provided for each magnetic pole of the rotor, the number of slots per pole per phase is 2 in the present embodiment, the rotor has eight magnetic poles and is such that the number of slots 21 provided in the stator core 20 is equal to 48 (i.e., 2X8X3) for each phase of the three-phase stator winding 10, as shown in fig. 13 and 14, the U1 and U2 windings in the U-phase winding are sequentially connected in series in the circumferential direction of the stator core, the V1 and V2 windings in the V-phase winding are sequentially connected in series in the circumferential direction of the stator core, and the W1 and W2 windings in the W-phase are sequentially connected in series in the circumferential direction of the stator core; further, in the present embodiment, the stator core 20 is defined by two adjacent slots 21, one tooth 22, and the stator core 20 is formed by laminating a plurality of annular magnetic steel plates, into which a plurality of insulating papers are inserted, at both end faces in the axial direction of the stator core, and it should be noted that other conventional metal plates may be used instead of the magnetic steel plates.

With reference to fig. 1, fig. 4, fig. 5, fig. 7, and fig. 9, each phase winding includes a plurality of conductors, each including a plurality of first large conductors, a plurality of first small conductors, a plurality of second conductors, and a plurality of fourth conductors, and each conductor includes, in sequence: sequentially connected with an out-of-slot end 303, an in-slot portion 301, an out-of-slot turn portion 302, an in-slot portion 301 and an out-of-slot portion 303, the two in-slot portions 301 are located in two slots of the stator core separated by a specified slot pitch, the two out-of-slot portions 303 are respectively located at one end outside the stator core slot and connected with the two in-slot portions 301, the out-of-slot turn portion 302 is located at the other end outside the stator core slot and connected with the two in-slot portions 301, with reference to fig. 13 and 14, the second out-of-slot end of the last conductor of the U1 branch winding in any phase winding is connected with the first out-of-slot end of the first conductor of the U2 branch winding, the slot pitch spanned by the two connected out-slot portions in the circumferential direction of the stator core is short pitch 5 (the slot pitch in the fifth embodiment in fig. 14 is long pitch 7), with reference to fig. 13 and 14, the out-slot ends, namely, the slot distance spanned by the outer end parts of the two slots welded with each other in the circumferential direction of the stator core is the integral pitch 6.

Further, with reference to fig. 13 and 14, in this embodiment, the phase winding includes 8 conductors located in the first radial layer of the stator core, where the 8 conductors include 4 first large conductors and 4 first small conductors, and 16 conductors located in the M-1 radial layer and the M-th radial layer of the stator core, and the 16 conductors include 8 second conductors and 8 fourth conductors; i.e. the number of slots inside each slot, which is received in the radial direction of the stator core, divides each slot into M layers, where M is equal to 3.

Exemplarily, as shown in fig. 4, 5 and 10, the first large conductor 210A and the first small conductor 210B are located in the first layer of the stator core in the radial direction, the pitch between the two slot interiors of the first large conductor 210A is Z, in this embodiment, Z is 7, i.e., larger than the pole pitch of the stator winding, the pitch between the two slot interiors of the first small conductor 210B is X, in this embodiment, X is 5, i.e., smaller than the pole pitch of the stator winding; referring to fig. 3, the two slot interiors 301 of the first large conductor 210A in the first radial layer of the stator core 20 are in the first layer of the first slot of the stator core 20, the first layer of the eighth slot; the two slot interiors 301 of the first small conductor 210B are positioned in the first layer of the second slot and the first layer of the seventh slot of the stator core 20; that is, the first large conductor 210A and the first small conductor 210B located in the first radial layer of the stator core 20 are located in the adjacent phase slots of the stator core 20, and the first large conductor 210A located in the first radial layer of the stator core 20 surrounds the first small conductor 210B.

Referring to fig. 7 and 9, in the first embodiment, the phase winding includes 16 conductors located at the M-1 th layer and the M-th layer in the radial direction of the stator core 20, and the pitch between the two slot interiors of the 16 conductors including 8 second conductors 220 and 8 fourth conductors 225 is Y, where Y is 6 in this embodiment, that is, equal to the pole pitch of the stator winding; and each interphase busbar is cancelled, direct connection between each interphase and the inside is realized, the complexity of the manufacturing process is reduced, the production cost is reduced, the material cost is reduced, and the processing efficiency is improved.

The pole pitch of the stator winding is equal to the number of phases of each winding multiplied by the number of magnetic poles of each group of phase conductors, a coil with a pitch larger than the pole pitch of the stator winding is a long-pitch coil, a coil with a pitch equal to the pole pitch of the stator winding is a full-pitch coil, and a coil with a pitch smaller than the pole pitch of the stator winding is a short-pitch coil; in this embodiment, specifically, each winding includes 3 sets of phase conductors, each set of phase conductors includes two conductors, the number of poles of each corresponding set of phase conductors is 2, and then the pole pitch of the stator winding is 2 × 3 — 6, that is, the pole pitch of the stator winding 2 is six.

Alternatively, as shown in fig. 10, in the first implementation, the pitch between the two slot interiors of the 16 second conductors 220 of the second and third layers of the phase winding in the radial direction of the stator core 20 is Y, where Y is 6 in this embodiment, that is, equal to the pole pitch of the stator winding; the pitch of the 8 second conductors 220 and the 8 fourth conductors 225 in the fourth and fifth radial layers of the stator core 20 is equal to the pole pitch of the stator winding. That is, the pitch of the 48 conductors 220 located at the second and third radial layers of the stator core 20 is equal to the pole pitch of the stator winding, and the pitch of the 48 conductors 220 and 230 located at the fourth and fifth radial layers of the stator core 20 is equal to the pole pitch of the stator winding.

Alternatively, as shown in fig. 11, in the second embodiment, the pitch between the two slot interiors of the 16 second conductors 220 of the phase winding, which are located in the second layer and the third layer in the radial direction of the stator core 20, is Y, where Y is 6 in this embodiment, that is, equal to the pole pitch of the stator winding; 8 of the fourth and fifth layers in the radial direction of the stator core 20 include fourth conductors 230 and 8 fifth conductors, the 8 fourth conductors include 4 fourth large conductors 230A and 4 fourth small conductors 230B, the 8 fifth conductors include 4 fifth large conductors and 4 fifth small conductors, the pitch between the two slot interiors of the large conductors is Z, in this embodiment, Z is 7, i.e., greater than the pole pitch of the stator winding, the pitch between the two slot interiors of the small conductors is X, and in this embodiment, X is 5, i.e., less than the pole pitch of the stator winding; that is, the pitch of the 48 conductors 220 in the second and third radial layers of the stator core 20 is equal to the pole pitch of the stator winding, the pitch of the 24 large conductors in the fourth and fifth radial layers of the stator core 20 is greater than the pole pitch of the stator winding, and the pitch of the 24 small conductors is smaller than the pole pitch of the stator winding.

Alternatively, as shown in fig. 12 in the third implementation, the phase winding includes 16 third conductors located at the second layer and the third layer of the stator core 20, including 8 third large conductors 230A and 8 third small conductors 230B, the pitch between the two slot interiors of the third large conductors 230A is Z, Z is a long pitch of 7 in this embodiment, i.e., greater than the pole pitch of the stator winding, the pitch between the two slot interiors of the third small conductors 230B is X, and X is a short pitch of 5 in this embodiment, i.e., less than the pole pitch of the stator winding; the pitch of the 8 second conductors 220 and the 8 third conductors 225 on the fourth layer and the fifth layer in the radial direction of the stator core is equal to the pole pitch of the stator winding. That is, the pitch of the 24 third large conductors 230A located in the second and third radial layers of the stator core 20 is greater than the pole pitch of the stator winding, and the pitch of the 24 third small conductors 230B is smaller than the pole pitch of the stator winding; the pitch of the 48 conductors 220, 225 in the fourth and fifth radial layers of the stator core 20 is equal to the pole pitch of the stator windings.

Optionally, in the fourth implementation, the phase winding includes 16 third conductors located at the second layer and the third layer in the radial direction of the stator core 20, including 8 third large conductors 230A and 8 third small conductors 230B, a pitch between two slot interiors of the third large conductor 230A is Z, in this embodiment, Z is 7, i.e., greater than a pole pitch of the stator winding, a pitch between two slot interiors of the third small conductor 230B is X, in this embodiment, X is 5, i.e., smaller than the pole pitch of the stator winding; the 16 conductors located at the fourth layer and the fifth layer in the radial direction of the stator core 20 include 4 fourth large conductors 230A, 4 fourth small conductors 230B, 4 fifth large conductors, and 4 fifth small conductors, the pitch between the two slot interiors of the fourth large conductors 230A and the fifth large conductors is Z, in this embodiment, Z is 7, that is, greater than the pole pitch of the stator winding, the pitch between the two slot interiors of the fourth small conductors 230B and the fifth small conductors is X, and in this embodiment, X is 5; that is, the pitch of the 24 third large conductors 230A located in the second and third radial layers of the stator core 20 is greater than the pole pitch of the stator winding, and the pitch of the 24 third small conductors 230B is smaller than the pole pitch of the stator winding; the pitch of the 24 large conductors positioned in the fourth layer and the fifth layer in the radial direction of the stator core 20 is larger than the pole pitch of the stator winding, and the pitch of the 24 small conductors is smaller than the pole pitch of the stator winding.

Furthermore, in the above-mentioned first to fourth embodiments, a plurality of conductors having the same pitch as that of the second layer and the third layer in the radial direction of the stator core 20 may be inserted at any position, that is, a plurality of conductors located in the N-1 th layer and the N-th layer in the radial direction of the stator core 20 may be inserted in the plurality of conductors in the first layer in the radial direction of the stator core 20 and in the M-1 th layer and the M-th layer in the radial direction of the stator core 20, and the pitch of the plurality of conductors is the same as that of the conductors located in the second layer and the third layer in the radial direction of the stator core 20 in any of the above-mentioned 4 embodiments, where N is smaller than.

Exemplarily, as shown in fig. 3, in the present embodiment, the first large conductor 210A of the U phase among the 24 conductors located in the first layer in the radial direction of the stator core 20 is located in the first slot and the eighth slot of the first layer of the stator core 20, the first small conductor 210B of the U phase is located in the second slot and the seventh slot of the first layer of the stator core 20, the first small conductor 210B of the V phase is located in the third slot and the forty-sixth slot of the first layer of the stator core 20, the first large conductor 210A of the V phase is located in the fourth slot and the forty-fifteenth slot of the first layer of the stator core 20, the first large conductor 210A of the W phase is located in the fifth slot and the twelfth slot of the first layer of the stator core 20, and the first small conductor 210B of the W phase is located in the sixth slot and the eleventh slot of the first layer of the stator core 20; that is, the extending directions of the out-of-slot turning portions of two conductors adjacent to each other in the same phase (U-phase, V-phase, or W-phase) located in the first radial layer of the stator core 20 are the same; as shown in fig. 3, the 24 conductors are located in the first layer of the 48 slots of the stator core 20, the slot outer ends of the 24 conductors are located outside the slots of the stator core 20 and extend in the same direction (both extend counterclockwise along the circumferential direction of the stator core), and the slot pitches extending in the circumferential direction are the same, and are all 3 slot pitches.

For example, as shown in fig. 6, in the present embodiment, the first U-phase second conductor 220 of the 48 second conductors 220 located in the second and third radial layers of the stator core 20 is located in the first slot of the second and third radial layers of the stator core 20, the second U-phase second conductor 220 is located in the second slot of the second radial layer of the stator core 20 and the fourth slot of the third radial layer, the first V-phase second conductor 220 is located in the third slot of the second radial layer of the stator core 20 and the forty-fifth slot of the third radial layer, the second V-phase second conductor 220 is located in the fourth slot of the second radial layer of the stator core 20 and the forty-sixth slot of the third radial layer, the first W-phase second conductor 220 is located in the fifth slot of the second radial layer of the stator core 20 and the forty-seventh slot of the third radial layer, and the second W-phase second conductor 220 is located in the sixth slot of the second radial layer of the stator core 20, A forty-eighth slot of the third layer; that is, the out-of-slot turning portions 302 of two in-phase adjacent conductors located in the second and third radial layers of the stator core 20 are located in the same direction, as shown in fig. 6, the 48 conductors are located in the second and third 48 slots of the stator core 20, the outer end portions 303 of the 48 conductor slots located in the second radial layer of the stator core 20 are located outside the slots of the stator core 20 and have the same extending direction (both extending clockwise along the circumferential direction of the stator core) and the same slot pitch extending in the circumferential direction, which are all 3 slot pitches, and the outer end portions 303 of the 48 conductors located in the third radial layer of the stator core 20 are located outside the slots of the stator core 20 and have the same extending direction (both extending counterclockwise along the circumferential direction of the stator core) and have the same slot pitch extending in the circumferential direction, which are all 3 slot pitches.

Illustratively, as shown in fig. 8, the first U-phase fourth conductor 225 located in the fourth and fifth radial layers of the stator core 20 is located in the first slot of the fourth radial layer of the stator core 20 and the fourth slot of the fifth radial layer of the stator core 20, the second U-phase fourth conductor 225 is located in the second slot of the fourth radial layer of the stator core 20 and the fourth slot of the fifth radial layer of the stator core 20, the first V-phase second conductor 220 is located in the third slot of the fourth radial layer of the stator core 20 and the fifth forty-fifth slot of the fifth radial layer of the stator core 20, the second V-phase second conductor 220 is located in the fourth slot of the fourth radial layer of the stator core 20 and the fifth forty-sixth slot of the fifth radial layer of the stator core 20, the first W-phase third conductor 230 is located in the fifth slot of the fourth radial layer of the stator core 20 and the fifth forty-seventh slot of the fifth radial layer of the stator core 20, and the second W-phase third conductor 230 is located in the sixth slot of the fourth radial layer of the stator core 20, The forty-eighth slot of the fifth layer, that is, the extending direction of the out-of-slot turning portions 302 of two conductors adjacent to each other in the same phase located in the fourth and fifth layers in the radial direction of the stator core 20 is the same.

Illustratively, as shown in fig. 8, 48 conductors located at the fourth layer and the fifth layer in the radial direction of the stator core 20 are located at the fourth layer and the fifth layer of the stator core 20, the outer ends of the 48 conductor slots located at the fourth layer in the radial direction of the stator core 20 are located outside the slots of the stator core 20 in the same extending direction (all extending clockwise in the circumferential direction of the stator core) and the slot pitches extending in the circumferential direction are the same, and all are 3 slot pitches, the outer ends of the partial slots located at the fifth layer of the 48 conductors located outside the slots of the stator core 20 in the same extending direction (all extending counterclockwise in the circumferential direction of the stator core) and the slot pitches extending in the circumferential direction are the same, and all are 3 slot pitches, the outer ends of the other partial slots located outside the slots of the stator core 20 in the sixth layer of the stator core 20 in the same extending direction (all extending clockwise in the circumferential direction of the stator core), except that the slot outer ends connected with the lead-out line or neutral point adjacent slots are 2 or 4, the slot pitches of the other circumferentially extending and crossing slots are all 3, and the slot pitch of the second outer end part of the last conductor of one branch winding of any corresponding phase winding, which is connected with the first outer end part of the first conductor of the other branch winding of the phase, is 5 or 7 (5 in the embodiment), which is different from the slot pitch 6 of the outer end parts of the other two connected slots of the phase; namely, the extending directions of the outer end parts of the slots of the fifth layer and the virtual sixth layer in the radial direction of the stator core 20 are opposite;

schematically, as shown in fig. 13 and 14, in any of three phases of the stator winding 10, the U1 winding branch and the U2 winding branch of the U-phase winding are sequentially connected in series along the circumferential direction of the stator core 20, respectively, the outer slot end 303 of the stator winding 10 has an extending end, except the extending end connected with the leading wire (the leading wire includes a lead end and a lead end, and the positions of the lead end and the lead end) the U-shaped conductors corresponding to the two branch windings of the U-phase winding of the stator winding are located at the outer slot end 303 extending end of the first layer adjacent to the outer slot end 303 in the same radial direction of the stator core 20 and connected with the outer slot end 303 extending end of the second layer, the two connected outer slot ends 303 are located at the outer circumferential direction of the stator core slot 21 and extend at a pitch of 6, the outer slot end 303 extending end 4 of the third layer adjacent to the outer slot end 303 in the same radial direction of the stator core, the pitch of the two connected out-of-slot ends 303 located at the outer circumference of the stator core slot 21 is 6, the extended end of the out-of-slot end 303 located at the fifth layer adjacent to the same radial direction of the stator core 20 is connected with the extended end of the out-of-slot end 303 located at the sixth layer, the pitch of the two connected out-of-slot ends 303 located at the outer circumference of the stator core slot 21 is 6 (i.e. the pitch of the two connected out-of-slot ends located at the outer end of the stator core (welded together) of the motor stator winding is 6, after the two branch windings U1 and U2 are connected in series in sequence corresponding to the out-of-slot ends, the second end of the last conductor of the U1 branch winding (i.e. the tail end of the U1 branch winding) is connected with the out-slot end of the first conductor of the U2 branch winding (i.e. the head end of the U2 branch winding), and, the distance between the outer ends of the two connected grooves is 7, and the distance between the outer ends of the two other connected grooves is 6; the outer end of the slot of the part extending from the sixth layer of the stator core also has a single or N outer ends of the slots which do not extend outwards and are indirectly connected through a bus bar (intermediate medium).

Leading-out wire and looks welded groove outer tip all are located stator core axial one end in this embodiment, and the leading-out wire (outlet terminal, inlet wire end) of U looks all is located the radial skin of stator core, correspondingly also can set up at the radial inlayer of stator core, and the U-shaped conductor's of adoption is few in the kind, and the mode of arranging is simple, has cancelled each interphase busbar, has realized each interphase interior lug connection, has reduced the preparation technology complexity, has reduced manufacturing cost, has reduced material cost, has improved machining efficiency.

Illustratively, as shown in fig. 15, 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 outlet terminal, the V-phase conductor outlet terminal, and the W-phase conductor outlet terminal use 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. 16, the U-phase conductor lead end is connected to the W-phase conductor outlet terminal, the W-phase conductor lead end is connected to the V-phase conductor outlet terminal, and the V-phase conductor lead end is connected to the U-phase conductor outlet terminal, that is, to complete the delta connection of the 2-branch windings of the odd.

The embodiment also provides a motor, which comprises a rotor and 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, stator winding's polar 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 6-pole 36 slots, 8-pole 48 slots, 10-pole 60 slots, 12-pole 72 slots, 16-pole 96 slots and the like, and the pole pitch of the stator winding 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 (11)

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 method 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 conductors, and each conductor comprises two slot interiors which are used for being inserted into different slots; each conductor also comprises a slot outer end part which is positioned at one end outside the stator core slot and is used for connecting the two slot interiors, and the slot pitch of the connection between the slot outer end part at the tail end of one branch winding in the phase winding and the slot outer end part at the head end of the other branch winding is different from the slot pitch of the slot outer end parts of the other connected slots in the phase winding; dividing each slot into M layers according to the number of the slots which can be accommodated in the radial direction of the stator core, wherein M is an odd number which is more than or equal to 3;

the pitch of one part of the conductors in the first layer in the radial direction of the stator core is larger than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding.

2. The electric machine stator of claim 1, wherein one of the conductors in one of the plurality of conductors at the first radial layer of the stator core is positioned in a stator core adjacent slot with one of the conductors in another of the plurality of conductors, and wherein one of the conductors in one of the plurality of conductors surrounds one of the conductors in the other of the plurality of conductors.

3. The stator of claim 1, wherein when M is greater than or equal to 5, the pitch of the plurality of conductors in the second and third radial layers of the stator core is equal to the pole pitch of the stator winding, and the pitch of the plurality of conductors in the fourth and fifth radial layers of the stator core is equal to the pole pitch of the stator winding.

4. The stator of claim 1, wherein when M is greater than or equal to 5, the pitch of the plurality of conductors located at the second and third radial layers of the stator core is equal to the pole pitch of the stator winding, the pitch of a portion of the plurality of conductors located at the fourth and fifth radial layers of the stator core is greater than the pole pitch of the stator winding, and the pitch of another portion of the plurality of conductors is less than the pole pitch of the stator winding.

5. The stator of claim 1, wherein when M is greater than or equal to 5, the pitch of one of the conductors located at the second and third layers of the stator core in the radial direction is greater than the pole pitch of the stator winding, and the pitch of the other of the conductors is smaller than the pole pitch of the stator winding; the pitches of the plurality of conductors positioned on the fourth layer and the fifth layer in the radial direction of the stator core are equal to the pole pitch of the stator winding.

6. The stator of claim 1, wherein when M is greater than or equal to 5, the pitch of one of the conductors located at the second and third layers of the stator core in the radial direction is greater than the pole pitch of the stator winding, and the pitch of the other of the conductors is smaller than the pole pitch of the stator winding; and the pitch of one part of the conductors in the fourth layer and the fifth layer in the radial direction of the stator core is greater than the pole pitch of the stator winding, and the pitch of the other part of the conductors in the plurality of conductors is smaller than the pole pitch of the stator winding.

7. The stator for an electric machine according to any one of claims 3 to 6, wherein when M is greater than 5, the plurality of conductors located at the N-1 st and N-th radial layers of the stator core have the same pitch as the plurality of conductors located at the second and third radial layers of the stator core, where N is an integer less than M.

8. The stator according to claim 1, wherein each of said conductors further comprises an out-of-slot turn at one end of the stator core connecting the interiors of two slots, the out-of-slot turns of two adjacent conductors in the same phase extending in the same direction; the outer end part of each slot connected with the inside of each slot of each conductor except the fourth layer and the fifth layer in the radial direction of the stator core is positioned on the same layer with the inside of the slot; the outer end parts of the slots on the same layer are the same along the extension direction of the stator core, and the outer end parts of the slots on two adjacent layers are opposite in distribution direction along the circumferential direction of the stator core.

9. The motor stator according to claim 1, wherein among the plurality of conductors located at the fourth and fifth layers in the radial direction of the stator core, the outer end of the slot connected to the inside of the slot located at the fourth layer in the radial direction of the stator core is located at the same level as the inside of the slot; the outer end parts of partial slots connected with the inner part of the slot positioned at the fifth layer of the stator core in the radial direction are positioned at the same layer with the inner part of the slot, and the outer end parts of other slots connected with the inner part of the slot positioned at the fifth layer of the stator core in the radial direction extend to one side far away from the fourth layer of the stator core in the radial direction from the layer in the inner part of the slot; the outer end parts of the slots positioned on the same layer are identical in extension direction along the circumferential direction of the stator core, and the outer end parts of the slots positioned on two adjacent layers are opposite in extension direction along the circumferential direction of the stator core.

10. The electric machine stator according to any one of claims 1 to 6, wherein the lead-out wire of each of the branch windings is located in an innermost winding layer or an outermost winding layer.

11. An electrical machine comprising an electrical machine stator according to any one of claims 1 to 10.

Images