CN218888246U - Flat wire motor stator and motor - Google Patents

Abstract

The invention provides a flat wire motor stator and a motor, wherein a plurality of coils of each phase winding of a stator winding comprise a plurality of first coils and a plurality of second coils; each first coil includes: the leading end is positioned on the first radial layer of the stator core, and the leading-out end is positioned on the Mth radial layer of the stator core; each of the second coils includes: the stator winding has the beneficial effects that the stator winding adopts a connection lap winding structure, the conductor type is single, welding spots are few, the end part of the motor stator winding is low, and the size of the motor is small.

Description

Flat wire motor stator and motor

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a flat wire motor stator and a motor.

Background

In the prior art, the motor stator winding mostly adopts the U-shaped conductor structure of multiple forms, which results in multiple conductor types, and the welding of the motor stator winding of the U-shaped conductor structure is more, the end part of the motor stator winding is high, and the size of the motor is large.

Disclosure of Invention

In view of the above problems, the present invention provides a flat-wire motor stator and a motor to solve the above or other former problems in the prior art.

In order to solve the technical problems, the invention adopts the technical scheme that: a flat wire motor 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;

the stator winding comprises a plurality of phase windings, and the phase windings are arranged on the stator iron core;

each phase winding comprises a plurality of coils which are sequentially connected along the circumferential direction of the stator core;

the plurality of coils of each phase winding comprise a plurality of first coils and a plurality of second coils;

each first coil includes: the leading end is positioned on the first radial layer of the stator core, and the leading-out end is positioned on the Mth radial layer of the stator core;

each second coil includes: the stator core comprises a lead end positioned on the radial L-th layer of the stator core and a lead-out end positioned on the radial N-th layer of the stator core, wherein M is the number of conductor layers in the slot, L is more than or equal to 1,N and is less than or equal to M, and N minus L is less than M minus 1.

Furthermore, each phase winding at least comprises Y second coils along the same radial direction of the stator core, the Y second coils are adjacent and sequentially connected along the same radial direction of the stator core, the outlet end of the Y-1 th second coil is connected with the inlet end of the Y second coil, and Y is more than or equal to 2.

Further, the wire outlet end of a second coil located on the radial mth layer of the stator core in at least one branch winding of each phase winding is connected with the wire outlet end of a first coil located on the radial first layer of the stator core along the circumferential direction of the stator core, or the wire outlet end of a first coil located on the radial mth layer of the stator core in at least one branch winding of each phase winding is connected with the wire outlet end of a second coil located on the radial first layer of the stator core along the circumferential direction of the stator core.

Further, every coil still includes a plurality of inslots and a plurality of turning portion, and stator core's axial both sides are located to a plurality of turning portions, and the different in situ in two grooves of stator core is located respectively to a plurality of inslots, and a plurality of inslots and a plurality of turning portion end to end connection in proper order, the lead-out wire of coil are located the radial both sides of stator core.

Furthermore, X slots in each coil, which are positioned in the same slot of the stator core, are adjacently arranged along the radial direction of the stator core, wherein X is an integer greater than or equal to 2.

Furthermore, the plurality of turning parts positioned on one side of the stator core in the axial direction in the first coil comprise at least two opening parts, and the inside of the slot connected with each opening part is positioned in the same slot and is separated by X layers; at least two opening parts are positioned at two sides of the circumferential direction of the stator core, and the opening directions of the opening parts are opposite.

Further, the plurality of turn portions of the second coil located on the other side in the axial direction of the stator core are adjacently arranged in the radial direction of the stator core.

Further, the stator winding at least comprises 3 × Q × y second coils, wherein Q is the number of slots per pole per phase.

Further, the number of radial layers M of the stator winding is not less than 6.

An electric machine comprises a flat wire electric machine stator as described above.

Due to the adoption of the technical scheme, the plurality of coils of each phase winding of the stator winding comprise a plurality of first coils and a plurality of second coils; each first coil includes: the leading end is positioned on the first radial layer of the stator core, and the leading-out end is positioned on the Mth radial layer of the stator core; each second coil includes: the stator winding has the beneficial effects that the stator winding adopts a connection and overlapping winding structure, the conductor type is single, welding spots are few, the end part of the motor stator winding is low, and the size of the motor is small.

Drawings

FIG. 1 is a schematic structural diagram of a stator according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a phase winding configuration according to an embodiment of the present invention;

FIG. 3 is a schematic view of another form of a phase winding according to an embodiment of the present invention;

FIG. 4 is an enlarged partial schematic view of FIG. 3 according to the present invention;

FIG. 5 is a schematic diagram of a local coil connection configuration in accordance with an embodiment of the present invention;

FIG. 6 is a schematic view of a local coil connection configuration according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a first coil in accordance with an embodiment of the present invention;

FIG. 8 is a schematic diagram of a second coil according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a top view of the structure of a first coil in accordance with an embodiment of the invention;

fig. 10A is a schematic plan development structure (first part) of a branch winding of any phase winding according to the first embodiment of the present invention;

fig. 10B is a schematic plan development structure (second part) of a branch winding of any phase winding according to the first embodiment of the present invention;

fig. 10C is a schematic plan development structure (third part) of a branch winding of any phase winding according to the first embodiment of the present invention;

fig. 10D is a schematic plan development structure (fourth part) of a branch winding of any phase winding according to the first embodiment of the present invention;

fig. 11A is a schematic plan development structure (first part) of another branch winding of any phase winding according to the first embodiment of the present invention;

fig. 11B is a schematic plan development structure (second part) of another branch winding of any phase winding according to the first embodiment of the present invention;

fig. 11C is a schematic plan development structure (third part) of another branch winding of any phase winding according to the first embodiment of the present invention;

fig. 11D is a schematic plan development view (fourth part) of another branch winding of any phase winding according to the first embodiment of the present invention;

fig. 12A is a schematic plan development structure (first part) of a branch winding of any phase winding of the second embodiment of the present invention;

fig. 12B is a schematic plan development structure (second part) of a branch winding of any phase winding of the second embodiment of the present invention;

fig. 12C is a schematic plan development structure (third portion) of a branch winding of any phase winding according to the second embodiment of the present invention;

fig. 12D is a schematic plan development view (fourth part) of a branch winding of any phase winding according to the second embodiment of the present invention;

fig. 13A is a schematic plan development structure (first part) of another branch winding of any phase winding according to the second embodiment of the present invention;

fig. 13B is a schematic plan development structure (second part) of another branch winding of any phase winding of the second embodiment of the present invention;

fig. 13C is a schematic plan development structure (third portion) of another branch winding of any one phase winding according to the second embodiment of the present invention;

fig. 13D is a schematic plan development view (fourth part) of another branch winding of any phase winding according to the second embodiment of the present invention;

in the figure:

10. stator winding 20, stator core 300, first coil

400. Second coil 5001, trench interior 5002, and opening

5003. Bonding part

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Fig. 1 shows a schematic structural diagram of an embodiment of the invention, which relates to a flat-wire motor stator and a motor, and the continuous lap-wound coils are sequentially connected to form a branch structure of any phase winding, and only the lead ends and the lead-out ends of two adjacent coils need to be connected, so that the coil is single in type and convenient to form, the stator winding is simple in preparation process and low in cost.

A flat wire motor stator, as shown in fig. 1 to 13D, includes a stator core 20, the stator core 20 having a plurality of slots 21, the plurality of slots 21 being formed on a radially inner surface of the stator core 20 and spaced apart at predetermined slot pitches in a circumferential direction of the stator core 20; a stator winding 10 including 3-phase windings, the 3-phase windings being mounted on a stator core 20;

referring to fig. 1 to 13D, a flat-wire motor stator includes: a stator winding 10, which is a three-phase winding (U-phase winding, V-phase winding, W-phase winding), and the number of each phase slot of each pole is 2, each magnetic pole of the stator is provided with 6 slots, the stator has 24 magnetic poles and is similar 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 144 (i.e. 2X3X 24), the three-phase winding is installed on 144 slots of the stator core 20 and forms M layers in the radial direction of the stator core, M is 8 in this embodiment, M is 12, and certainly may also be 16, which is not further described herein; in addition, in the present embodiment, the stator core 20 has one tooth 22 defined by two adjacent slots, and the stator core is formed by laminating a plurality of annular magnetic steel plates to form two end faces in the axial direction of the flat wire electric stator core.

Exemplarily, as shown in fig. 1 to 3, in the embodiment, each phase winding includes a plurality of coils sequentially connected in a circumferential direction of the stator core 20; the plurality of coils of each phase winding include a plurality of first coils 300 and a plurality of second coils 400;

referring to fig. 1 to 3, each of the phase windings (U-phase winding, V-phase winding, W-phase winding) includes a plurality of coils (first coil 300, second coil 400) connected in sequence along a circumferential direction of the stator core 20; in the first embodiment, each phase winding includes 46 first coils 300 and 4 second coils 400, and in the second embodiment, each phase winding includes 46 first coils 300 and 6 second coils 400;

illustratively, as shown in fig. 7, each first coil 300 includes: a lead terminal located at the first radial layer of the stator core 20 and a lead terminal located at the mth radial layer of the stator core 20, where M is 8;

with reference to fig. 7, 10A to 13D, each first coil 300 includes: a plurality of inslot portions 5001, a plurality of turn portions, a plurality of inslot portions 5001 are located two inslots of stator core circumference regulation slot pitch, a plurality of turn portions are located the inslot portion 5001 that two inslots are connected to stator core axial both sides, second coil 400 still includes: the lead ends and the wire outlet ends are positioned at the radial two sides of the stator core, the lead end of the second coil 400 is connected with the first slot interior 5001 positioned in the first slot of the stator core, and the wire outlet end of the second coil 400 is connected with the last slot interior 5001 positioned in the second slot of the stator core; specifically, in the first embodiment, the lead end of one first coil 300 is connected to the inside of the first slot located in the 1 st layer of the 7 th slot of the stator core by the other axial side 25 of the stator core, the inside of the first slot is connected to the inside of the second slot located in the 3 rd layer of the 1 st slot of the stator core by the first turn portion of one axial side 26 of the stator core, the inside of the second slot is connected to the inside of the third slot located in the 2 nd layer of the 7 th slot of the stator core by the first turn portion of the other axial side 25 of the stator core, the inside of the third slot is connected to the inside of the fourth slot located in the 4 th layer of the 1 st slot of the stator core by the second turn portion of one axial side 26 of the stator core, the inside of the fourth slot is connected to the inside of the fifth slot located in the 7 th layer of the 1 st slot of the stator core by the third turn portion of the other axial side 25 of the stator core, the inside of the fifth slot is connected to the inside of the sixth slot located in the 7 th layer of the 1 st slot of the stator core by the third turn portion of the one axial side 26 of the stator core, the seventh slot is connected to the inside of the seventh slot by the seventh coil, and the seventh coil is connected to the inside of the seventh coil exit end of the seventh slot of the stator core by the seventh slot 26 of the stator core; in the second embodiment, the lead terminal of a first coil 300 is connected to the first slot inside of the 1 st layer of the 8 th slot of the stator core from the other side 25 in the axial direction of the stator core, the first slot inside is connected to the second slot inside of the 3 rd layer of the 2 nd slot of the stator core from the first turn part of the one side 26 in the axial direction of the stator core, the second slot inside is connected to the third slot inside of the 2 nd layer of the 8 nd slot of the stator core from the first turn part of the other side 25 in the axial direction of the stator core, the third slot inside is connected to the fourth slot inside of the 4 th layer of the 2 nd slot of the stator core from the second turn part of the one side 26 in the axial direction of the stator core, the fourth slot inside is connected to the fifth slot inside of the 5 th layer of the 8 th slot of the stator core from the third turn part of the one side 26 in the axial direction of the stator core, the fifth slot inside is connected to the sixth slot inside of the 7 th layer of the 2 nd slot of the stator core, the seventh slot inside of the sixth slot is connected with the seventh slot inside of the 6 th layer of the 8 th slot of the stator core by the third turn part of the other axial side 25 of the stator core, the seventh slot inside is connected with the eighth slot inside of the 8 th layer of the 2 nd slot of the stator core by the fourth turn part of the one axial side 26 of the stator core, the eighth slot inside is connected with the ninth slot inside of the 9 th layer of the 8 th slot of the stator core by the fourth turn part of the other axial side 25 of the stator core, the ninth slot inside is connected with the tenth slot inside of the 11 th layer of the 2 nd slot of the stator core by the fifth turn part of the one axial side 26 of the stator core, the tenth slot inside is connected with the eleventh slot inside of the 10 th layer of the 8 th slot of the stator core by the fifth turn part of the other axial side 25 of the stator core, and the eleventh slot inside is connected with the sixth turn part of the one axial side 26 of the stator core and is located at the fifth slot inside of the stator core The inner part of a twelfth slot of the 12 th layer of the 2 slots is connected with the outlet end of the second coil by the other axial side 25 of the stator core; the first coil 300 includes a lead terminal located at the first layer in the radial direction of the stator core and a lead terminal located at the mth layer in the radial direction of the stator core, where M is 8 in the first embodiment and 12 in the second embodiment.

Illustratively, as shown in fig. 8, each of the second coils 400 includes: the number of the lead terminals on the L-th radial layer of the stator core 20 and the number of the outlet terminals on the N-th radial layer of the stator core 20 are M, where M is the number of conductors in the slot, L is equal to 1,N, 4,N (4) -L (1) is less than 8-1 in this embodiment, and L may also be equal to 5,N, 8,N (8) -L (5), and is less than 8-1.

With reference to fig. 8 and fig. 10A to fig. 13D, the second coil 400 includes a plurality of in-slot portions 5001, a plurality of turn portions, the plurality of in-slot portions 5001 are located in two slots with a specified slot pitch in the circumferential direction of the stator core, the plurality of turn portions are located on two axial sides of the stator core, each turn portion is connected to the in-slot portion 5001 in the two slots, the second coil 400 further includes a lead end and a lead end located on two radial sides of the stator core, the lead end of the second coil 400 is connected to the first in-slot portion located in the first slot of the stator core, the lead end of the second coil 400 is connected to the last in-slot portion located in the second slot of the stator core, specifically, the lead end of one second coil 400 is connected to the first in-slot portion located in the 1 st slot of the stator core by the other axial side 25 of the stator core, the first in-slot portion located in the 3 rd slot of the stator core by the first turn portion located on one axial side 26 of the stator core, the second in-slot portion located in the second slot 2 of the stator core, the second coil portion is connected to the third in-slot portion located in the stator core by the first turn portion located in the stator core axial side 25, and the fourth turn portion located in the stator core inner slot of the stator core is connected to the fourth turn portion located in the stator core by the stator core 25; the lead end of another second coil 400 is connected with the inside of the first slot positioned at the 5 th layer of the 92 th slot of the stator core from the other axial side 25 of the stator core, the inside of the first slot is connected with the inside of the second slot positioned at the 7 th layer of the 86 th slot of the stator core from the first turning part at one axial side of the stator core, the inside of the second slot is connected with the inside of the third slot positioned at the 6 th layer of the 92 th slot of the stator core from the first turning part at the other axial side of the stator core, the inside of the third slot is connected with the inside of the fourth slot positioned at the 8 th layer of the 86 th slot of the stator core from the second turning part at one axial side of the stator core, and the inside of the fourth slot is connected with the lead-out end of the second coil from the other axial side 25 of the stator core; in the second embodiment, specifically, the lead end of one second coil 400 is connected to the first slot inside the 1 st layer of the 91 st slot of the stator core from the other side 25 in the axial direction of the stator core, the first slot inside is connected to the second slot inside the 3 rd layer of the 85 th slot of the stator core from the first turn part of one side 26 in the axial direction of the stator core, the second slot inside is connected to the third slot inside the 2 nd layer of the 91 st slot of the stator core from the first turn part of the other side 25 in the axial direction of the stator core, the third slot inside is connected to the fourth slot inside the 4 th layer of the 85 th slot of the stator core from the second turn part of one side 26 in the axial direction of the stator core, and the fourth slot inside is connected to the lead end of the second coil from the other side 25 in the axial direction of the stator core; the lead end of another second coil 400 is connected with the inside of the first slot positioned at the 5 th layer of the 91 th slot of the stator core from the other axial side 25 of the stator core, the inside of the first slot is connected with the inside of the second slot positioned at the 7 th layer of the 85 th slot of the stator core from the first turning part at one axial side 26 of the stator core, the inside of the second slot is connected with the inside of the third slot positioned at the 6 th layer of the 91 th slot of the stator core from the first turning part at the other axial side 25 of the stator core, the inside of the third slot is connected with the inside of the fourth slot positioned at the 8 th layer of the 85 th slot of the stator core from the second turning part at one axial side of the stator core, and the inside of the fourth slot is connected with the lead-out end of the second coil from the other axial side 25 of the stator core; the lead end of the second coil 400 is connected with the first slot inside the 9 th layer of the 91 th slot of the stator core from the other axial side 25 of the stator core, the first slot inside is connected with the second slot inside the 11 th layer of the 85 th slot of the stator core from the first turning part on one axial side of the stator core, the second slot inside is connected with the third slot inside the 10 th layer of the 91 th slot of the stator core from the first turning part on the other axial side 25 of the stator core, the third slot inside is connected with the fourth slot inside the 12 th layer of the 85 th slot of the stator core from the second turning part on one axial side 26 of the stator core, and the fourth slot inside is connected with the lead-out end of the second coil from the other axial side 25 of the stator core; in the first embodiment, when the number of conductor layers in the slot of M is 8, the second coil 400 includes: the lead end located at the radial 1 st layer of the stator core 20 and the lead end located at the radial 4 th layer of the stator core 20, of course, the lead end of the second coil 400 may be located at the radial 5 th layer of the stator core, the lead end located at the radial 8 th layer of the stator core, L may be 1, 5,N is 4, 8, and as in the second embodiment, when the number of layers of the conductor in the slot of M is 12, the lead end of the second coil 400 may also be located at the radial 9 th layer of the stator core, the lead end located at the radial 12 th layer of the stator core, L may be 1, 5, 9,N is 4, 8, 12.

Illustratively, as shown in fig. 3, 4, 8, 10A to 13D, in the embodiment, each phase winding at least includes Y second coils 400 along the same radial direction of the stator core 20, the Y second coils 400 are adjacently connected in sequence along the same radial direction of the stator core 20, the outlet end of the Y-1 th second coil 400 is connected to the inlet end of the Y second coil 400, Y is equal to 2 in the first embodiment, and Y is equal to 3 in the second embodiment.

With reference to fig. 10C, in the first embodiment, each phase winding includes at least 2 second coils 400,2 in the same radial direction of the stator core 20, the two second coils 400 are adjacently and sequentially connected in the same radial direction of the stator core 20, the outlet end of the 1 st second coil 400 is connected to the inlet end of the 2 nd second coil 400, where Y is 2, specifically, the first branch winding of the U phase winding includes 2 second coils 400, the first second coil 400 is located in the 92 nd and 86 th slots of the 1 st to 4 th layers in the radial direction of the stator core, the second coil 400 is located in the 92 th and 86 th slots of the 5 th to 8 th layers in the radial direction of the stator core, the outlet end of the 1 st second coil 400 located in the 86 th slot of the 4 th layer in the radial direction of the stator core is connected to the lead end of the 2 nd second coil 400 located in the 92 th slot of the 5 th layer in the radial direction of the stator core, as shown in fig. 11A to 11D, the first embodiment, the second branch winding of the U phase winding 400 may also include no more U phase branch winding as the U phase winding 400.

With reference to fig. 12C, in the second embodiment, each phase winding at least includes 3 second coils 400,3 connected in sequence along the same radial direction of the stator core 20, the wire outlet end of the 2 nd second coil 400 is connected to the wire inlet end of the 3 rd second coil 400, where Y is 3, of course, the wire outlet end of the 1 st second coil 400 is connected to the wire inlet end of the 2 nd second coil 400, specifically, the first branch winding of the U-phase winding includes 3 second coils 400, the first second coil 400 is located in the 91 st slot and the 85 th slot of the 1 st layer to the 4 th layer in the radial direction of the stator core, the second coil 400 is located in the 91 st slot and the 85 th slot of the 5 th layer to the 8 th layer in the radial direction of the stator core, the third second coil 400 is located in the 91 st slot and the 85 th slot of the 9 th layer to the 12 th layer in the radial direction of the stator core, the leading-out end of the 1 st second coil 400 in the groove interior of the 85 th groove on the radial 4 th layer of the stator core and the connecting leading end of the 2 nd second coil 400 in the groove interior of the 91 th groove on the radial 5 th layer of the stator core are positioned in the same radial direction of the stator core and connected, the leading-out end of the 2 nd second coil 400 in the groove interior of the 85 th groove on the radial 8 th layer of the stator core and the leading end of the 3 rd second coil 400 in the groove interior of the 91 th groove on the radial 9 th layer of the stator core are positioned in the same radial direction of the stator core and connected, and the leading-out end of the 1 st second coil 400 in the groove interior of the 85 th groove on the radial 4 th layer of the stator core and the connecting leading end of the 2 nd second coil 400 in the groove interior of the 91 th groove on the radial 5 th layer of the stator core and the leading-out end of the 2 nd second coil 400 in the groove interior of the 85 th groove on the radial 8 th layer of the stator core and the 3 rd second coil 400 in the groove interior of the radial 9 th layer of the stator core are positioned in the same radial direction of the stator core and connected The connected lead wire ends are positioned on the stator core and are connected in sequence in the same radial direction; as shown in fig. 13A to 13D, in the second embodiment, the second branch winding of the U-phase winding does not include the second coil 400, but may include 3 second coils 400 as the first branch winding of the U-phase winding.

Illustratively, as shown in fig. 5, fig. 10A to fig. 10D, and fig. 12A to fig. 12D, an outlet terminal of one second coil 400 located at the mth layer in the radial direction of the stator core 20 in at least one branch winding of each phase winding is connected to an outlet terminal of one first coil 300 located at the first layer in the radial direction of the stator core 20 along the circumferential direction of the stator core, or an outlet terminal of one first coil 300 located at the mth layer in the radial direction of the stator core 20 in at least one branch winding of each phase winding is connected to an outlet terminal of one second coil 400 located at the first layer in the radial direction of the stator core 20 along the circumferential direction of the stator core.

With reference to fig. 5 and 10C, in the first embodiment, the wire outlet end connected inside one slot of one second coil 400 located in the 86 th radial layer slot of the stator core 20 in at least one branch winding of the U-phase winding is circumferentially connected to the wire outlet end connected inside one slot of one first coil 300 located in the 79 th radial layer slot of the stator core 20 along the stator core, and with reference to fig. 6, of course, the wire outlet end connected inside one slot of one first coil 300 located in the 97 th radial layer slot of the stator core 20 in at least one branch winding of the U-phase winding is circumferentially connected to the wire outlet end connected inside one slot of one second coil 400 located in the 92 th radial layer slot of the stator core 20 along the stator core; with reference to fig. 12C, in the second embodiment, in at least one branch winding of the U-phase winding, an outlet terminal connected inside one slot of one second coil 400 located in the 85 th slot of the 12 th layer in the radial direction of the stator core 20 is connected to a lead terminal connected inside one slot of one first coil 300 located in the 80 th slot of the 1 st layer in the radial direction of the stator core 20 along the circumferential direction of the stator core, with reference to fig. 6 and 12C, it is a matter of course that an outlet terminal connected inside one slot of one first coil 300 located in the 98 th slot of the 12 th layer in the radial direction of the stator core 20 in at least one branch winding of the U-phase winding is connected to a lead terminal connected inside one slot of one second coil 400 located in the 91 st layer in the radial direction of the stator core 20 along the circumferential direction of the stator core.

Illustratively, as shown in fig. 7 and 8, each coil further includes a plurality of in-slot portions 5001 and a plurality of turn portions, the plurality of turn portions are disposed on two axial sides of the stator core 20, the plurality of in-slot portions 5001 are respectively disposed in different layers of two slots of the stator core 20, the plurality of in-slot portions and the plurality of turn portions are sequentially connected end to end, and the lead-out wires of the coil are located on two radial sides of the stator core.

Further, as shown in fig. 1 to fig. 13D, the inside of X slots in each coil, which are located in the same slot of the stator core, are adjacently arranged along the radial direction of the stator core 20, in this embodiment, X is equal to 2, and of course, X may also be 3 as needed.

With reference to fig. 7 and 8, in an embodiment, each coil includes a plurality of in-slot portions 5001 and a plurality of turn portions, the plurality of turn portions are disposed at two axial sides of the stator core 20, the plurality of in-slot portions 5001 are respectively disposed in different layers of two slots of the stator core 20, the plurality of in-slot portions 5001 and the plurality of turn portions 5002 are sequentially connected end to end, and outgoing lines of the coil are located at two radial sides of the stator core, so as to form an integral structure of the coil;

specifically, in the first embodiment, the lead terminal of a first coil 300 is connected from the other axial side of the stator core to the first slot inside the 1 st layer of the 7 th slot of the stator core, the first slot inside is connected from the first turn portion on one axial side of the stator core to the second slot inside the 3 rd layer of the 1 st slot of the stator core, the second slot inside is connected from the first turn portion on the other axial side of the stator core to the third slot inside the 2 nd layer of the 7 th slot of the stator core, the third slot inside is connected from the second turn portion on one axial side of the stator core to the fourth slot inside the 4 th layer of the 1 st slot of the stator core, the fourth slot inside is connected from the third turn portion on the other axial side of the stator core to the fifth slot inside the 5 th layer of the 7 th slot of the stator core, the fifth slot inside is connected from the third turn portion on one axial side of the stator core to the sixth slot inside the 7 th layer of the 1 st slot of the stator core, the seventh slot inside of the sixth slot is connected with the seventh slot inside of the 6 th layer of the 7 th slot of the stator core by the third turning part at the other side of the stator core in the axial direction, the seventh slot inside is connected with the eighth slot inside of the 8 th layer of the 1 st slot of the stator core by the fourth turning part at one side of the stator core in the axial direction, the eighth slot inside is connected with the wire outlet end of the second coil by the other side of the stator core in the axial direction, the slot insides are sequentially connected with the turning parts end to end, the slot insides of the 1 st slot of the stator core in the first coil 300 are respectively positioned on the radial 3 rd layer, the 4 th layer, the 7 th layer and the 8 th layer of the stator core, and are respectively positioned in the radial adjacent arrangement of every 2 slot insides of the 1 st slot of the stator core along the stator core 20, and the slot insides of the 7 th slot of the stator core are respectively positioned on the radial 1 st layer of the stator core, the 2 nd layer, the 5 th layer, the 6 th layer, and be located stator core 7 th inslot every 2 inslots and radially adjacent along stator core 20 sets up, and a plurality of inslots of first coil 300 are inside respectively locating the different layers in stator core's two grooves promptly.

In the second embodiment, the lead terminal of a first coil 300 is connected to the first slot inside of the 1 st layer of the 8 th slot of the stator core from the other axial side of the stator core, the first slot inside is connected to the second slot inside of the 3 rd layer of the 2 nd slot of the stator core from the first turn part of the one axial side of the stator core, the second slot inside is connected to the third slot inside of the 2 nd layer of the 8 th slot of the stator core from the first turn part of the other axial side of the stator core, the third slot inside is connected to the fourth slot inside of the 4 th layer of the 2 nd slot of the stator core from the second turn part of the one axial side of the stator core, the fourth slot inside is connected to the fifth slot inside of the 5 th layer of the 8 th slot of the stator core from the second turn part of the other axial side of the stator core, the fifth slot inside is connected to the sixth slot inside of the 7 th layer of the 2 nd slot of the stator core from the third turn part of the one axial side of the stator core, the seventh slot inside of the sixth slot is connected with the seventh slot inside of the 6 th layer of the 8 th slot of the stator core by the third turn part at the other side of the stator core axial direction, the seventh slot inside is connected with the eighth slot inside of the 8 th layer of the 2 nd slot of the stator core by the fourth turn part at one side of the stator core axial direction, the eighth slot inside is connected with the ninth slot inside of the 9 th layer of the 8 th slot of the stator core by the fourth turn part at the other side of the stator core axial direction, the ninth slot inside is connected with the tenth slot inside of the 11 th layer of the 2 nd slot of the stator core by the fifth turn part at one side of the stator core axial direction, the tenth slot inside is connected with the tenth slot inside of the 10 th layer of the 8 th slot of the stator core by the fifth turn part at the other side of the stator core axial direction, and the eleventh slot inside is connected with the twelfth slot inside of the 12 th layer of the 2 nd slot of the stator core by the sixth turn part at one side of the stator core axial direction Inside, the outlet terminal of this second coil is connected by stator core axial opposite side to the twelfth inslot portion, a plurality of inslots portion and a plurality of turn portions end to end connection in proper order, lie in radial 3 rd floor of stator core respectively in a plurality of inslots portion of stator core 2 nd groove in this first coil 300, 4 th floor, 7 th floor, 8 th floor, 11 th floor, 12 th floor, and lie in stator core 2 nd inslot every 2 inslot portions and set up along stator core 20 radial adjacent, lie in radial 1 st floor of stator core respectively in a plurality of inslot portions of stator core 8 th groove, 2 nd floor, 5 th floor, 6 th floor, 9 th floor, 10 th floor, and lie in stator core 8 th inslot every 2 every inslot portions and set up along stator core 20 radial adjacent, namely, the different in two slots of stator core is located respectively in a plurality of inslot portions of first coil 300.

In the embodiment, the lead terminal of one second coil 400 is connected to the first slot inside of the 1 st layer of the 92 nd slot of the stator core from the other axial side of the stator core, the first slot inside is connected to the second slot inside of the 3 rd layer of the 86 rd slot of the stator core from the first turning part at one axial side of the stator core, the second slot inside is connected to the third slot inside of the 2 nd layer of the 92 nd slot of the stator core from the first turning part at the other axial side of the stator core, the third slot inside is connected to the fourth slot inside of the 4 th layer of the 86 th slot of the stator core from the second turning part at one axial side of the stator core, the fourth slot inside is connected to the outlet terminal of the second coil from the other axial side of the stator core, and the plurality of slot insides are sequentially connected end to end with the plurality of turning parts; the lead end of another second coil 400 is connected with the first slot inside the 5 th layer of the 92 th slot of the stator core from the other axial side of the stator core, the first slot inside is connected with the second slot inside the 7 th layer of the 86 th slot of the stator core from the first turning part on one axial side of the stator core, the second slot inside is connected with the third slot inside the 6 th layer of the 92 th slot of the stator core from the first turning part on the other axial side of the stator core, the third slot inside is connected with the fourth slot inside the 8 th layer of the 86 th slot of the stator core from the second turning part on one axial side of the stator core, the fourth slot inside is connected with the outlet end of the second coil from the other axial side of the stator core, and the slot insides are sequentially connected end to end with the turning parts; the plurality of slot interiors that lie in the 86 th slot of stator core in this second coil 400 are located radial 3 rd floor, 4 th floor of stator core respectively, and lie in the radial adjacent setting of stator core 20 along 2 slot interiors of the 86 th slot of stator core, lie in radial 1 st floor, the 2 nd floor of stator core respectively in a plurality of slot interiors that lie in the 92 th slot of stator core, and lie in the radial adjacent setting of stator core 20 along 2 slot interiors of the 92 th slot of stator core, namely a plurality of slot interiors of first coil 300 locate respectively in the different in-layers of two slots of stator core.

For example, as shown in fig. 7 and 9, the first coil 300 includes at least two opening portions 5002 in the plurality of turning portions located on one side 25 in the axial direction of the stator core, and the slot inner portions 5001 connected to each opening portion 5002 are located in the same slot and separated by 2 slots; at least two openings 5002 are located on both sides of the stator core 20 in the circumferential direction, and the openings 5002 are in opposite directions.

Referring to fig. 7 and 9, in the first embodiment, in the first coil 300, the turns on one side 25 in the axial direction of the stator core each include 2 out-of-slot portions 5050 inside the connection slots on the same layer and a torsion portion 5020 connecting the two out-of-slot portions, the first turn on one side 25 in the axial direction of the stator core is connected to the out-of-slot portion 5050 inside the slot on the 3 rd layer in the radial B slot of the stator core through the first torsion portion 5020 by the out-of-slot portion 5050 connected inside the slot on the 2 nd layer in the radial a slot of the stator core, the second turn on one side 25 in the axial direction of the stator core is connected to the out-of-slot portion 5050 inside the slot on the 5 th layer in the radial a slot of the stator core through the second torsion portion 5020, the third turn portion on one axial side 25 of the stator core is connected with the external slot extension portion 5050 connected with the internal slot of the 6 th layer of the radial a slot of the stator core through the third torsion portion 5020, the external slot extension portion 5050 connected with the internal slot of the 7 th layer of the radial B slot of the stator core is connected with the 3 turn portions on one axial side 25 of the stator core and comprises two opening portions 5002, the first opening portion 5002 is formed by connecting the external slot extension portion 5050 connected with the internal slot of the radial a slot 2 of the stator core in the first turn portion, the first torsion portion 5020 with the external slot extension portion 5050 connected with the internal slot of the radial a slot 5 th layer of the stator core in the second turn portion, and the second torsion portion 5020, the first torsion portion 5020 is connected with the second torsion portion 5020, the internal slot connected with the first opening portion 5002 is located in the 2a slot (namely, the two internal slots which are separated by the radial 3 rd layer and the 4 th layer of the stator core) and is located in the left circumferential direction of the stator core The second opening portion 5002 is formed by connecting an outer groove extending portion 5050 in the second turning portion, which is located inside a groove on the 4 th layer of the radial B-th groove of the stator core, with a second torsion portion 5020, which is connected with an outer groove extending portion 5050 and a third torsion portion 5020 in the third turning portion, which are located inside a groove on the 7 th layer of the radial B-th groove of the stator core, wherein the second torsion portion 5020 is connected with the third torsion portion 5020, the groove connected with the second opening portion is located in a 2-layer B-groove (i.e., two groove portions which are separated from the 5 th layer and the 6 th layer in the radial direction of the stator core) and is located in an opening (close to the B-groove direction of the stator core) in the right side direction in the circumferential direction of the stator core, the a groove is any one of the 144 grooves, the B groove is a groove separated from the a groove by a specified groove distance, i.e., the groove portion 5001 connected with each opening portion 5002 is located in the same groove; the two openings 5002 are located on both sides of the stator core 20 in the circumferential direction, and the openings 5002 are opposite in opening direction.

Referring to fig. 12A to 13D, in the second embodiment, in the first coil 300, the plurality of turns located on one side 25 in the axial direction of the stator core each include 2 out-of-slot portions 5050 inside the same-layer connection slots and a torsion portion 5020 connecting the two out-of-slot portions, the first turn located on one side 25 in the axial direction of the stator core is connected to the out-of-slot portion 5050 connected inside the slot located on the 3 rd layer in the radial B slot of the stator core through the first torsion portion 5020 by the out-of-slot portion 5050 connected inside the slot located on the 2 nd layer in the radial a slot of the stator core, the second turn located on one side 25 in the axial direction of the stator core is connected to the out-of-slot portion 5050 located on the 5 th layer in the radial a slot of the stator core through the second torsion portion 5050 by the out-of-slot portion 5050 located on the 4 th layer in the radial B slot of the stator core, the third turn on one axial side 25 of the stator core is connected by an out-of-slot extension 5050 connected inside the slot at the 6 th layer of the radial a slot of the stator core via a third twist 5020 to an out-of-slot extension 5050 connected inside the slot at the 7 th layer of the radial B slot of the stator core, the fourth turn on one axial side 25 of the stator core is connected by an out-of-slot extension 5050 connected inside the slot at the 8 th layer of the radial B slot of the stator core via a fourth twist 5020 to an out-of-slot extension 5050 connected inside the slot at the 9 th layer of the radial a slot of the stator core, the fifth turn on one axial side 25 of the stator core is connected by an out-of-slot extension 5050 connected inside the slot at the 10 th layer of the radial a slot of the stator core via a fifth twist 5020 to an out-of-slot extension 5050 connected inside the slot at the 11 th layer of the radial B slot of the stator core, the 5 turns on one axial side 25 of the stator core, the stator core comprises 4 opening parts 5002, the first opening part 5002 is formed by connecting an outer extension part 5050 of a 2 nd layer of a first turning part positioned in a radial A-slot of the stator core, a first torsion part 5020, an outer slot extension part 5050 of a 5 th layer of a second turning part positioned in a radial A-slot of the stator core and a second torsion part 5020, the first torsion part 5020 is connected with the second torsion part 5020, the connected slot inner parts of the first opening part are positioned in 2 layers (namely, the two slot inner parts of a 3 rd layer and a 4 th layer of the radial A-slot of the stator core) in the A-slot and are positioned in an opening (close to the direction of the A-slot of the stator core) in the left side direction in the circumferential direction of the stator core, the second opening part 5002 is formed by connecting an outer extension part 5050 of the second turning part positioned in the inner part of a 4 th layer of the radial B-slot of the stator core, the first torsion part 5020 and the outer slot extension part 5050 of the third turning part 5020 and the second torsion part 5020 connected in the inner part of the 5 th layer of the radial B-slot of the stator core, the second torsion portion 5020 is connected with the third torsion portion 5020, the slot connected with the second opening portion is located in the slot B at 2 layers (namely, the slot connected with the radial 5 th layer and the slot connected with the radial 6 th layer of the stator core) and is located in the opening (close to the direction of the slot B of the stator core) in the circumferential right direction of the stator core, the third opening portion 5002 is formed by connecting the outer slot extension portion 5050 connected with the slot inner positioned in the radial 6 th layer of the stator core in the third turning portion, the third torsion portion 5020 with the outer slot extension portion 5050 connected with the slot inner positioned in the radial 9 th layer of the stator core in the fourth turning portion, and the fourth torsion portion 5020, the third torsion portion 5020 is connected with the fourth torsion portion 5020, and the slot connected with the third opening portion is located in the slot a at 2 layers (namely, the slot connected with the radial stator core in the A slot inner position at 2 layers (namely, the radial direction of the stator core in the turning portion) Two slots on the 7 th layer and the 8 th layer) and positioned in the left side direction of the circumference of the stator core (close to the A-slot direction of the stator core), the fourth opening portion 5002 is formed by connecting an outer extension portion 5050 and a fourth torsion portion 5020 which are positioned in the slot inner part of the radial B-slot 8 th layer of the stator core in the fourth turning portion and an outer extension portion 5050 and a fifth torsion portion 5020 which are positioned in the slot inner part of the radial B-slot 11 th layer of the stator core in the fifth turning portion, the fourth torsion portion 5020 is connected with the fifth torsion portion 5020, the slot inner part connected with the fourth opening portion is positioned in a B-slot spacing 2 layer (namely two slots on the 9 th layer and the 10 th layer in the radial direction of the stator core) and positioned in the right side direction of the circumference of the stator core (close to the B-slot direction of the stator core), the A-slot is any one slot in 144 slots, and the B-slot is a slot separated by a specified slot pitch, namely, the slot inner portion 5001 connected with each opening portion 5002 is positioned in the same slot spacing 2 layer in the same slot; the first opening and the third opening of the 4 openings 5002 are located on the left side of the stator core 20 in the circumferential direction, the second opening and the fourth opening of the 4 openings 5002 are located on the right side of the stator core 20 in the circumferential direction, the 4 openings 5002 are located on both sides of the stator core 20 in the circumferential direction, and the openings 5002 are opposite in opening direction.

Illustratively, as shown in fig. 8, the plurality of turns of the second coil 400 located on one axial side 26 of the core are arranged adjacent to each other in the radial direction of the stator core 20.

With reference to fig. 8 and 10C, each turn portion of the second coil 400 located on one axial side 26 of the stator core includes 2 slot outer extensions 5050 connected in the same layer and a torsion portion connecting the two slot outer extensions, a first turn portion located on one axial side 26 of the stator core is connected to a slot inner connecting slot outer extension 5050 located in the 3 rd radial slot of the stator core through a first torsion portion by using a slot inner connecting slot outer extension 5050 located in the 1 st radial slot 92 of the stator core, and a second turn portion located on one axial side 26 of the stator core is connected to a slot inner extension 5050 located in the 2 nd radial slot 92 of the stator core through a first torsion portion by using a slot inner connecting slot outer extension 5050 located in the 4 th radial slot 86 of the stator core, that is, 2 turn portions located on the other axial side 26 of the stator core are arranged adjacent to each other in the radial direction of the stator core 20.

Illustratively, as shown in fig. 1 to fig. 3, the stator winding 10 at least includes 3 × Q × y second coils 400, in this embodiment, Q is 2, and when Q is equal to 1, the stator winding 10 at least includes 3 second coils 400.

With reference to fig. 1 to fig. 3, in the embodiment, the stator winding 10 includes 6*2 second coils 400, each phase winding includes 2 second coils 400 in the same radial direction, in the first embodiment, each 2 second coils 400 are located in the same radial direction of the stator core, in the second embodiment, each 3 second coils 400 are located in the same radial direction of the stator core, and of course, the same radial direction may also include 4 second coils; each phase winding comprises 2 second coils 400 in the same radial direction, each three-phase winding comprises 6 second coils 400 in the same radial direction, and 6 coils are arranged in the circumferential direction of the stator core in an adjacent mode, wherein the 6 coils are the minimum value contained in the stator winding, and certainly, more second coils 400 in the same radial direction can be contained;

illustratively, as shown in fig. 1 to 13D, the number M of radial layers of the stator winding 20 is not less than 6.

The number of radial layers of the stator core 20 is not less than 6, and the radial layers are selected according to actual requirements, and no specific requirement is made here.

An electric machine comprises a flat wire electric machine stator as described above.

By adopting the technical scheme, any phase winding of the stator winding is composed of the plurality of coils, the coils are prepared by sequentially winding the inside of two slots of a single conductor at a specified slot distance along the circumferential direction of the stator core, the coils are of a continuous lap winding structure, the plurality of coils in any branch are sequentially connected, the type of the coils is single, the forming is convenient, the preparation process of the stator winding is simple, and the cost is low.

The embodiments of the present invention have been described in detail, but the present invention is only the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. A flat wire motor 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;

the method is characterized in that: each phase winding comprises a plurality of coils which are sequentially connected along the circumferential direction of the stator core;

the plurality of coils of each phase winding comprise a plurality of first coils and a plurality of second coils;

each of the first coils includes: the leading end is positioned on the first radial layer of the stator core, and the leading-out end is positioned on the Mth radial layer of the stator core;

each of the second coils includes: the stator core comprises a lead end positioned on the radial L-th layer of the stator core and a wire outlet end positioned on the radial N-th layer of the stator core, wherein M is the number of conductor layers in the slot, L is more than or equal to 1,N and is less than or equal to M, and N minus L is less than M minus 1.

2. The flat wire motor stator according to claim 1, characterized in that: and each phase winding at least comprises Y second coils along the same radial direction of the stator core, the Y second coils are adjacent and sequentially connected along the same radial direction of the stator core, the Y-1 th wire outlet end of each second coil is connected with the Y-th wire inlet end of each second coil, and Y is more than or equal to 2.

3. The flat wire motor stator according to claim 2, characterized in that: the leading-out terminal of a second coil on the radial Mth layer of the stator core in at least one branch winding of each phase winding is circumferentially connected with the leading-out terminal of a first coil on the radial first layer of the stator core, or the leading-out terminal of a first coil on the radial Mth layer of the stator core in at least one branch winding of each phase winding is circumferentially connected with the leading-out terminal of a second coil on the radial first layer of the stator core.

4. The flat wire motor stator according to claim 3, characterized in that: every the coil still includes a plurality of inslots and a plurality of turn portions, a plurality of turn portions are located stator core's axial both sides, a plurality of inslots are located respectively in the different layers in two grooves of stator core, a plurality of inslots with a plurality of turn portions end to end in proper order.

5. The flat wire motor stator according to claim 4, characterized in that: and X slots in the coil, which are positioned in the same slot of the stator core, are adjacently arranged along the radial direction of the stator core, wherein X is an integer greater than or equal to 2.

6. The flat wire motor stator according to claim 5, characterized in that: the first coil is positioned in the plurality of turning parts on the other axial side of the stator core and comprises at least two opening parts, and the inside of a groove connected with each opening part is positioned in the same groove and is separated by X layers; at least two opening parts are positioned on two sides of the stator core in the circumferential direction, and the opening directions of the opening parts are opposite.

7. The flat wire motor stator according to claim 5, characterized in that: the plurality of turning portions located on one axial side of the stator core in the second coil are arranged adjacent to each other in the radial direction of the stator core.

8. The flat wire motor stator according to claim 2, characterized in that: the stator winding at least comprises 3 × Q × Y second coils, wherein Q is the number of slots per pole and per phase.

9. The flat wire motor stator according to claim 1, characterized in that: and the number M of radial layers of the stator winding is not less than 6.

10. An electric machine characterized by: comprising a flat wire motor stator according to any of claims 1-9.

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