CN213782996U

CN213782996U - Flat wire stator outlet end structure and flat wire motor

Info

Publication number: CN213782996U
Application number: CN202022704705.5U
Authority: CN
Inventors: 陈彪; 马霁旻; 崔舜宇; 王超; 刘光华; 李婷; 周斌; 夏洋; 周海鹰; 舒海斌
Original assignee: Zhixin Technology Co Ltd
Current assignee: Zhixin Technology Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-07-23
Anticipated expiration: 2030-11-20

Abstract

The utility model relates to a flat wire stator end structure and flat wire motor of being qualified for next round of competitions. This flat wire stator outlet end structure includes flat wire stator winding and outlet wire connection structure: the flat wire stator winding comprises a U-phase winding, a V-phase winding and a W-phase winding which are connected in a star shape; the outgoing line connecting structure comprises a U-phase copper bar connected with the U-phase winding, a V-phase copper bar connected with the V-phase winding, a W-phase copper bar connected with the W-phase winding, and a neutral point copper bar connected with each phase of winding, wherein the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the neutral point copper bar are arranged on the same side of the flat wire stator winding in a spatially staggered manner; each phase winding comprises 2n branch outgoing lines and 2n neutral point outgoing lines, wherein the 2n branch outgoing lines are respectively connected to two sides of the phase copper bar, and the 2n neutral point outgoing lines are respectively connected to two sides of the neutral point copper bar; n is a positive integer of 1 or more. The utility model discloses increase the connection reliability of three-phase lead-out wire when reducing the winding overhang height, still guaranteed stator leading-out terminal insulating properties.

Description

Flat wire stator outlet end structure and flat wire motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to flat wire stator outlet end structure and flat wire motor.

Background

With the development of new energy automobile technology, the requirements on the power and the volume of an automobile motor are higher and higher. The high power density of a flat wire motor using a flat copper wire as a flat wire stator winding is receiving more and more attention due to the high slot filling rate of the flat wire motor. However, compared with the conventional circular wire winding, the flat wire winding still has many design difficulties in the aspects of wire forming and three-phase outgoing, which affects the mass production and industrialization of the flat wire stator. At present, a plurality of technologies aim to improve the wire plugging method and the winding forming of the flat copper winding, and no good solution exists for a three-phase outlet terminal.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flat wire stator end structure and flat wire motor of being qualified for next round of competitions can increase the connection reliability of three-phase lead-out wire when reducing the winding overhang height, has still guaranteed stator leading-out terminal insulating properties.

In a first aspect, the utility model provides a flat wire stator leading-out terminal structure, include:

the flat wire stator winding is arranged in the stator core and comprises a U-phase winding, a V-phase winding and a W-phase winding which are connected in a star shape; and the number of the first and second groups,

the outgoing line connecting structure comprises a U-phase copper bar connected with the U-phase winding, a V-phase copper bar connected with the V-phase winding, a W-phase copper bar connected with the W-phase winding, and a neutral point copper bar simultaneously connected with the U-phase winding, the V-phase winding and the W-phase winding; the U-phase copper bar, the V-phase copper bar and the W-phase copper bar are arranged side by side and are arranged on the same side of the flat wire stator winding in a spatially staggered manner with the neutral point copper bar;

the U-phase winding, the V-phase winding and the W-phase winding respectively comprise 2n branch outgoing lines and 2n neutral point outgoing lines which are distributed on the innermost layer and the outermost layer of the flat wire stator winding, wherein the 2n branch outgoing lines are respectively connected to two sides of the U-phase copper bar, the V-phase copper bar or the W-phase copper bar, and the 2n neutral point outgoing lines are respectively connected to two sides of the neutral point copper bar; n is a positive integer greater than or equal to 1;

the neutral point outgoing line, the branch outgoing line, the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the neutral point copper bar are all coated with insulating powder layers.

In some embodiments, the U-phase winding, the V-phase winding, and the W-phase winding each include n adjacent branch inner layer outgoing lines provided at an innermost layer of the flat wire stator winding, and n adjacent branch outer layer outgoing lines provided at an outermost layer of the flat wire stator winding;

the U-phase copper bar, the V-phase copper bar and the W-phase copper bar respectively comprise an arc-shaped branch outer layer connecting section and an arc-shaped branch inner layer connecting section, a branch middle confluence section for connecting the branch outer layer connecting section and the branch inner layer connecting section, and a branch opposite outer connecting end which is axially and convexly arranged on the branch inner layer connecting section, the branch outer layer connecting section or the branch middle confluence section; the n branch outer layer outgoing lines are connected to the branch outer layer connecting section, and the n branch inner layer outgoing lines are connected to the branch inner layer connecting section;

the branch outer connecting section of the V-phase copper bar and the branch inner connecting section of the U-phase copper bar are arranged side by side, the branch outer connecting section of the W-phase copper bar and the branch inner connecting section of the V-phase copper bar are arranged side by side, the branch outer connecting section of the U-phase copper bar is arranged corresponding to one end of the neutral point copper bar, and the branch inner connecting section of the W-phase copper bar is arranged corresponding to the other end of the neutral point copper bar; the branch inner layer outgoing line, the branch outer layer connecting section, the branch inner layer connecting section and the branch middle confluence section are coated with the insulating powder layer.

In some embodiments, n branch inner layer notch grooves are arranged in parallel on the inner sides of the branch inner layer connecting sections of the U-phase copper bar, the V-phase copper bar and the W-phase copper bar, and n branch outer layer notch grooves are arranged in parallel on the outer sides of the branch outer layer connecting sections of the U-phase copper bar, the V-phase copper bar and the W-phase copper bar;

the U-phase winding, the V-phase winding and the n of W-phase winding the one end of branch road inner layer outgoing line all has the branch road inner layer end of drawing forth that extends the setting, the U-phase winding, the V-phase winding and the n of W-phase winding the one end of branch road outer layer outgoing line all has the branch road outer layer end of drawing forth that extends the setting, n the branch road inner layer end of drawing forth laser welding on one-to-one in n in the branch road inner layer breach groove, n the branch road outer layer end of drawing forth laser welding on one-to-one in n in the branch road outer layer breach groove.

In some embodiments, each of the branch inner lead-out wires includes a branch inner bending portion, a branch inner linear section respectively disposed at two ends of the branch inner bending portion, a branch inner standard solder joint end disposed at an end of one of the branch inner linear sections, and a branch inner lead-out end disposed at an end of the other branch inner linear section;

each branch outer layer outgoing line comprises a branch outer layer bending part, a branch outer layer straight line section part respectively arranged at two ends of the branch outer layer bending part, a branch outer layer standard welding spot end arranged at the end part of one branch outer layer straight line section part, and a branch outer layer outgoing end arranged at the end part of the other branch outer layer straight line section part; the branch outer layer leading-out end and the branch inner layer leading-out end are arranged in an aligned mode, and the branch outer layer standard welding spot end and the branch inner layer standard welding spot end are arranged in an aligned mode.

In some embodiments, the outer layer leading-out end of the branch is 4-8mm higher than the standard welding point end of the outer layer of the branch;

the radial distance between the U-phase copper bar, the V-phase copper bar and the W-phase copper bar and the innermost ring and the radial distance between the outermost ring and the outermost ring of the flat wire stator winding are all 0-3 mm;

the branch inner layer leading-out end and the branch outer layer leading-out end are protruded out of the surface of the U-phase copper bar, the V-phase copper bar or the W-phase copper bar by 0-2 mm.

In some embodiments, the U-phase winding, the V-phase winding, and the W-phase winding each include n adjacent neutral point inner layer outgoing lines provided at an innermost layer of the flat wire stator winding, and n adjacent neutral point outer layer outgoing lines provided at an outermost layer of the flat wire stator winding;

the neutral point copper bar comprises an arc-shaped neutral point outer layer connecting section, an arc-shaped neutral point inner layer connecting section and a neutral point middle confluence section which is connected with the neutral point outer layer connecting section and the neutral point inner layer connecting section, n neutral point inner layer outgoing lines of the U-phase winding, the V-phase winding and the W-phase winding are sequentially connected to the neutral point inner layer connecting section, and n neutral point outer layer outgoing lines of the U-phase winding, the V-phase winding and the W-phase winding are sequentially connected to the neutral point outer layer connecting section;

the neutral point copper bar is positioned below the U-phase copper bar, the V-phase copper bar and the W-phase copper bar, the neutral point outer layer connecting section and the branch inner layer connecting section are arranged side by side, and the neutral point inner layer connecting section and the branch outer layer connecting section are arranged side by side; the neutral point inner layer outgoing line, the neutral point outer layer outgoing line, the neutral point inner layer connecting section and the neutral point middle confluence section are all coated with the insulating powder layer.

In some embodiments, n neutral point inner layer gap grooves are arranged on the inner side of the neutral point inner layer connecting section side by side, and n neutral point outer layer gap grooves are arranged on the outer side of the neutral point outer layer connecting section side by side;

n the one end of the outer lead-out wire of neutral point all has the outer end of drawing out of neutral point that extends the setting, and n laser welding is drawn out to the inner layer of neutral point on the one-to-one ground in the notch groove of neutral point on n laser welding is drawn out to the outer end of neutral point on the one-to-one ground in the notch groove of neutral point on n.

In some embodiments, each of the neutral point inner layer outgoing lines includes a neutral point inner layer bent portion, neutral point inner layer straight line sections respectively provided at both ends of the neutral point inner layer bent portion, a neutral point inner layer standard solder joint end provided at an end of one of the neutral point inner layer straight line sections, and the neutral point inner layer outgoing end provided at an end of the other of the neutral point inner layer straight line sections;

each neutral point outer layer outgoing line comprises a neutral point outer layer bending part, neutral point outer layer straight line section parts respectively arranged at two ends of the neutral point outer layer bending part, a neutral point outer layer standard welding spot end arranged at the end part of one neutral point outer layer straight line section part, and a neutral point outer layer outgoing end arranged at the end part of the other neutral point outer layer straight line section part; the neutral point outer layer leading-out end and the neutral point inner layer leading-out end are arranged in an aligned mode, and the neutral point outer layer standard welding point end and the neutral point inner layer standard welding point end are arranged in an aligned mode.

In some embodiments, the axial distance between the neutral point copper bar and the standard welding point end of the neutral point inner layer is 1-5 mm;

the axial distance between the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the neutral point copper bar is 1-5 mm.

In a second aspect, the present invention provides a flat wire motor, including the flat wire stator outlet end structure as described above.

The utility model provides a beneficial effect that technical scheme brought includes: the three-phase external connection function is provided while the branch circuits of each phase are converged, the connection reliability of the three-phase outgoing line can be improved while the height of the end part of the winding is reduced, and the insulating property of the outlet end of the stator is also ensured.

The embodiment of the utility model provides a flat wire stator end structure of being qualified for next round of competitions, connect the U phase winding of flat wire stator winding through the U looks copper bar, connect the V phase winding through the V looks copper bar, connect the W phase winding through the W looks copper bar, still connect U phase winding, V phase winding and W phase winding through the neutral point copper bar simultaneously, can conveniently converge to each looks branch road, also conveniently externally to the three-phase simultaneously. In addition, the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the neutral point copper bar are arranged on the same side of the flat wire stator winding in a centralized manner, and are arranged at the same height position side by side, and the neutral point copper bar is arranged in a staggered manner with the U-phase copper bar, the V-phase copper bar and the W-phase copper bar, so that the occupied end space of the flat wire stator winding of a plurality of copper bars can be reduced, and the height of the end part of the winding can be reduced; moreover, the plurality of copper bars are arranged in a staggered manner, so that the three-phase outgoing lines are conveniently connected with the copper bars, and the connection is reliable; in addition, the neutral point outgoing line, the branch outgoing line, the U-phase copper bar, the V-phase copper bar, the W-phase copper bar and the neutral point copper bar are coated with the insulating powder layers, so that the insulating performance of the copper bars and the outgoing lines is enhanced, and the insulating performance of the stator outgoing line end is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic perspective view of a flat wire stator outlet end structure according to an embodiment of the present invention;

fig. 2 is a schematic partial structural view of an outlet connection structure portion of an outlet end structure of a flat-wire stator according to an embodiment of the present invention;

fig. 3 is a schematic top view of the outlet end structure of the flat-wire stator according to the embodiment of the present invention;

fig. 4 is a schematic perspective view of a U-phase copper bar of the flat wire stator outlet end structure according to the embodiment of the present invention;

fig. 5 is a schematic perspective view of a V-phase copper bar of the flat wire stator outlet end structure according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of a W-phase copper bar of the flat wire stator outlet end structure according to the embodiment of the present invention;

fig. 7 is a schematic perspective view of a neutral point copper bar of the flat wire stator outlet end structure according to the embodiment of the present invention;

fig. 8 is a schematic perspective view of a U-phase branch outgoing line of a flat wire stator outgoing end structure according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of a U-phase neutral point outgoing line of a flat wire stator outlet end structure according to an embodiment of the present invention.

In the figure: 100. a stator core; 200. a flat wire stator winding; 210. a U-phase branch outgoing line; 212. an outer outgoing line of the U-phase branch; 2122. an outer bending part of the U-phase branch; 2124. the outer layer straight line section part of the U-phase branch; 2126. an outer layer leading-out end of the U-phase branch; 2128. the outer layer standard welding spot end of the U-phase branch; 214. an inner layer outgoing line of the U-phase branch; 220. a V-phase branch outgoing line; 222. an outer outgoing line of the V-phase branch; 224. an inner layer outgoing line of the V-phase branch; 230. a W-phase branch outgoing line; 232. an outer outgoing line of the W-phase branch; 234. an inner layer outgoing line of the W-phase branch; 240. neutral point lead lines (U-phase neutral point lead line, V-phase neutral point lead line, W-phase neutral point lead line); 242. a neutral point outer layer outgoing line; 2422. a neutral point outer layer bending part; 2424. a neutral point outer layer straight line section part; 2426. a neutral point outer layer leading-out terminal; 2428. a standard welding spot end on the outer layer of the neutral point; 244. a neutral point inner layer outgoing line; 300. u-phase copper bars; 302. a notch groove is formed in the outer layer of the U-phase branch; 304. a U-phase branch inner layer gap groove; 310. the outer layer connecting section of the U-phase branch; 320. a U-phase branch intermediate confluence section; 330. an inner layer connecting section of the U-phase branch; 340. the U phase branch is connected with the external end; 400. v-phase copper bars; 402. a V-phase branch outer layer notch groove; 404. a V-phase branch inner layer notch groove; 410. the outer layer connecting section of the V-phase branch; 420. a V-phase branch intermediate confluence section; 430. a V-phase branch inner layer connecting section; 440. the V phase branch is connected with the external end; 500. w-phase copper bars; 502. a gap groove is formed in the outer layer of the W-phase branch; 504. a W-phase branch inner layer gap groove; 510. the outer layer connecting section of the W-phase branch; 520. a W-phase branch intermediate bus section; 530. a W-phase branch inner layer connecting section; 540. the W phase branch is connected with the external end; 600. a neutral point copper bar; 602. a notch groove is formed in the outer layer of the neutral point; 604. a gap groove on the inner layer of the neutral point; 610. a neutral point outer layer connecting section; 620. a neutral point intermediate bus bar; 630. and the neutral point inner layer is connected with the segment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to fig. 3, the flat wire stator terminal structure of the present invention includes a flat wire stator winding 200 and a wire connection structure. The flat wire stator winding 200 is used for being installed in the stator core 100 and includes a U-phase winding, a V-phase winding and a W-phase winding which are connected in a star shape; moreover, the outgoing line connecting structure comprises a U-phase copper bar 300 connected with the U-phase winding, a V-phase copper bar 400 connected with the V-phase winding, a W-phase copper bar 500 connected with the W-phase winding, and a neutral point copper bar 600 connected with the U-phase winding, the V-phase winding and the W-phase winding simultaneously; and the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500 are arranged side by side and spatially staggered with the neutral point copper bar 600 on the same side of the flat wire stator winding 200.

Furthermore, the above-mentioned U-phase winding, the V-phase winding and the W-phase winding may include 2n branch outgoing lines and 2n neutral point outgoing lines distributed on the innermost layer and the outermost layer of the flat wire stator winding 200, the 2n branch outgoing lines of each phase winding are respectively and correspondingly connected to two sides of the U-phase copper bar, the V-phase copper bar or the W-phase copper bar (i.e., the 2n branch outgoing lines of the U-phase winding are respectively connected to two sides of the U-phase copper bar, the 2n branch outgoing lines of the V-phase winding are respectively connected to two sides of the V-phase copper bar, the 2n branch outgoing lines of the W-phase winding are respectively connected to two sides of the W-phase copper bar), and the 2n neutral point outgoing lines of each phase winding are respectively connected to two sides of the neutral point copper bar 600 (i.e., the 2n neutral point outgoing lines of the U-phase winding, the 2n neutral point outgoing lines of the V-phase winding and the 2n neutral point outgoing lines of the W-phase winding are respectively connected to two sides of the neutral point 600); and n is a positive integer of 1 or more. Moreover, the neutral point outgoing line, the branch outgoing line, the U-phase copper bar 300, the V-phase copper bar 400, the W-phase copper bar 500 and the neutral point copper bar 600 are coated with insulating powder layers.

In foretell flat wire stator outlet end structure, connect the U phase winding of flat wire stator winding 200 through U phase copper bar 300, connect the V phase winding through V phase copper bar 400, connect the W phase winding through W phase copper bar 500, still connect U phase winding, V phase winding and W phase winding through neutral point copper bar 600 simultaneously, can conveniently converge each looks branch road, also conveniently connect the three-phase simultaneously. In addition, the U-phase copper bar 300, the V-phase copper bar 400, the W-phase copper bar 500 and the neutral point copper bar 600 are arranged on the same side of the flat wire stator winding 200 in a centralized manner, the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500 are arranged at the same height side by side, and the neutral point copper bar 600 is arranged in a staggered manner with the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500, so that the end space of the flat wire stator winding 200 occupied by a plurality of copper bars can be reduced, and the height of the end of the winding can be reduced; moreover, the plurality of copper bars are arranged in a staggered mode, and the three-phase outgoing lines are arranged on the innermost layer and the outermost layer of the winding respectively, so that enough space is conveniently provided for enabling the three-phase outgoing lines to be connected with the copper bars in a welding mode, and the connection is more reliable; in addition, the neutral point outgoing line, the branch outgoing line, the U-phase copper bar 300, the V-phase copper bar 400, the W-phase copper bar 500 and the neutral point copper bar 600 are coated with insulating powder layers, so that the insulating performance of the copper bars and the outgoing lines is enhanced, and the insulating performance of the stator outgoing line end is ensured.

Specifically, the U-phase winding may include 2n U-phase neutral point outgoing lines 240 and 2n U-phase branch outgoing lines 210 distributed on the innermost layer and the outermost layer of the flat wire stator winding 200, the 2n U-phase neutral point outgoing lines 240 are all connected to both sides of the neutral point copper bar 600, the 2n U-phase branch outgoing lines 210 are respectively connected to both sides of the U-phase copper bar 300, that is, the 2n U-phase neutral point outgoing lines 240 may be respectively connected to both sides of the neutral point copper bar 600 in a staggered manner, and the 2n U-phase branch outgoing lines 210 may be respectively connected to both sides of the U-phase copper bar 300 in a staggered manner. Moreover, the V-phase winding may include 2n V-phase neutral point outgoing lines 240 and 2n V-phase branch outgoing lines 220 distributed on the innermost layer and the outermost layer of the flat wire stator winding 200, the 2n V-phase neutral point outgoing lines 240 are all connected to both sides of the neutral point copper bar 600, and the 2n V-phase branch outgoing lines 220 are respectively connected to both ends of the V-phase copper bar 400, that is, the 2n V-phase neutral point outgoing lines 240 may be respectively connected to both sides of the neutral point copper bar 600 in a staggered manner, and the 2n V-phase branch outgoing lines 220 may be respectively connected to both sides of the V-phase copper bar 400 in a staggered manner. Moreover, the W-phase winding may include 2n W-phase neutral point outgoing lines 240 and 2n W-phase branch outgoing lines 230 distributed on the innermost layer and the outermost layer of the flat wire stator winding 200, the 2n W-phase neutral point outgoing lines 240 are all connected to both sides of the neutral point copper bar 600, and the 2n W-phase branch outgoing lines 230 are respectively connected to both sides of the W-phase copper bar 500, that is, the 2n W-phase neutral point outgoing lines 240 may be respectively connected to both sides of the neutral point copper bar 600 in a staggered manner, and the 2n W-phase branch outgoing lines 230 may be respectively connected to both sides of the W-phase copper bar 500 in a staggered manner. Like this, can provide sufficient connecting space for neutral point copper bar 600, three-phase copper bar and three-phase lead-out wire, also can make neutral point copper bar 600, three-phase copper bar and three-phase lead-out wire connect compactly, can reduce occupation space, can guarantee again to connect the reliability.

Further, the U-phase winding, the V-phase winding, and the W-phase winding may each include n adjacent branch inner-layer outgoing lines provided at an innermost layer of the flat-wire stator winding 200, and n adjacent branch outer-layer outgoing lines provided at an outermost layer of the flat-wire stator winding 200. Namely, n of the 2n branch outgoing lines (210, 220, 230) of each phase winding are arranged on the innermost layer of the flat wire stator winding 200, and the other n branch outgoing lines are arranged on the outermost layer of the flat wire stator winding 200, so that the n branch outgoing lines are separately arranged and are more conveniently connected with the copper bar. Moreover, the inner-layer outgoing lines of the n branches can be arranged adjacently (i.e. close) so as to be more conveniently and intensively connected with one end of the copper bar; similarly, the n branch outer layer outgoing lines are arranged adjacently (namely close to each other), so that the n branch outer layer outgoing lines are more conveniently connected with the other end of the copper bar in a concentrated mode.

Specifically, as shown in fig. 3 to 7, each of the U-phase copper bar 300, the V-phase copper bar 400, and the W-phase copper bar 500 may include an arc-shaped branch outer connecting section and an arc-shaped branch inner connecting section, a branch intermediate bus section connecting the branch outer connecting section and the branch inner connecting section, and a branch external connecting end protruding in the axial direction of the stator core and disposed on the branch inner connecting section, or the branch outer connecting section, or the branch intermediate bus section; the n branch outer layer outgoing lines are connected to the branch outer layer connecting section, and the n branch inner layer outgoing lines are connected to the branch inner layer connecting section. Namely, the three-phase copper bars are all arranged into a structural form which extends from the outmost layer of the flat wire stator winding 200 to the innermost layer of the flat wire stator winding 200 in a bending way, so that the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500 are arranged side by side in a drawing way, and the three-phase copper bars are connected with branch outgoing lines positioned on the outmost layer and the innermost layer of the flat wire stator winding 200 conveniently. Moreover, the shape of the branch outer layer connecting section of the three-phase copper bar corresponds to the shape of the outer layer (outer ring) of the flat wire stator winding 200, and the shape of the branch inner layer connecting section of the three-phase copper bar corresponds to the shape of the inner layer (inner ring) of the flat wire stator winding, so that the shape of the three-phase copper bar corresponds to the shape of the flat wire stator winding, and the three-phase copper bar is more conveniently connected with each outgoing line positioned on the innermost layer and the outermost layer of the flat wire stator winding.

And, the branch road outer linkage segment of above-mentioned V looks copper bar 400 and the branch road inner linkage segment of U looks copper bar 300 set up side by side about, and the branch road outer linkage segment of above-mentioned W looks copper bar 500 and the branch road inner linkage segment of V looks copper bar 400 set up side by side about, and the branch road outer linkage segment of above-mentioned U looks copper bar 300 corresponds the setting from top to bottom with the one end of neutral point copper bar 600, and the branch road inner linkage segment of above-mentioned W looks copper bar 500 corresponds the setting from top to bottom with the other end of neutral point copper bar 600. Like this for each section of each looks copper bar sets up side by side together, makes neutral point copper bar 600 and three-phase copper bar correspond the setting each other simultaneously, makes three-phase copper bar and neutral point copper bar 600 set up compacter, can further reduce occupation space. And the branch inner layer outgoing line and the branch outer layer outgoing line of each phase winding, the branch outer layer connecting section, the branch inner layer connecting section and the branch middle confluence section of each phase copper bar are coated with insulating powder layers, so that the branch outgoing line of each phase winding and each connecting section of each phase copper bar have good insulating property.

Further, the U-phase winding may include n adjacent U-phase branch inner layer outgoing lines 214 provided at an innermost layer of the flat-wire stator winding 200, and n adjacent U-phase branch outer layer outgoing lines 212 provided at an outermost layer of the flat-wire stator winding 200; moreover, as shown in fig. 4, the U-phase copper bar 300 may include an arc-shaped U-phase branch outer connecting section 310 and an arc-shaped U-phase branch inner connecting section 330, a U-phase branch intermediate bus section 320 connecting the U-phase branch outer connecting section 310 and the U-phase branch inner connecting section 330, and a U-phase branch outer connecting end 340 protruding from the U-phase branch inner connecting section 330 in the axial direction of the stator core 100; the n U-phase branch outer-layer outgoing lines 212 are all connected to the U-phase branch outer-layer connecting section 310, and the n U-phase branch inner-layer outgoing lines 214 are all connected to the U-phase branch inner-layer connecting section 330. Thus, the n U-phase branch inner layer outgoing lines 214 of the U-phase winding, which are positioned on the innermost layer of the flat wire stator winding 200, can be correspondingly connected with the U-phase branch inner layer connecting section 330 of the U-phase copper bar 300, which is positioned on the innermost layer of the flat wire stator winding 200, and the n U-phase branch outer layer outgoing lines 212 of the U-phase winding, which are positioned on the outermost layer of the flat wire stator winding 200, can be correspondingly connected with the U-phase branch outer layer connecting section 310 of the U-phase copper bar 300, which is positioned on the outermost layer of the flat wire stator winding 200, so that the connection is simple and compact. Moreover, the U-phase branch external connection end 340 protruding from the U-phase branch internal connection section 330 of the U-phase copper bar 300 can be conveniently connected to the outside. In addition, the U-phase branch external connection end 340 may be disposed at the U-phase branch external connection section 310 or the U-phase branch intermediate bus bar section 320.

Further, the above-described V-phase winding may include n adjacent V-phase branch inner layer outgoing lines 224 provided at the innermost layer of the flat-wire stator winding 200, and n adjacent V-phase branch outer layer outgoing lines 222 provided at the outermost layer of the flat-wire stator winding 200; furthermore, as shown in fig. 5, the V-phase copper bar 400 may include an arc-shaped V-phase branch outer layer connecting section 410 and an arc-shaped V-phase branch inner layer connecting section 430, a V-phase branch intermediate bus section 420 connecting the V-phase branch outer layer connecting section 410 and the V-phase branch inner layer connecting section 430, and a V-phase outer connecting end 440 protruding in the axial direction of the stator core 100 and provided on the V-phase branch intermediate bus section 420; the n V-phase branch outer layer outgoing lines 222 are all connected to the V-phase branch outer layer connecting section 410, and the n V-phase branch inner layer outgoing lines 224 are all connected to the V-phase branch inner layer connecting section 430. Similarly, the n V-phase branch inner outgoing lines 224 of the V-phase winding located at the innermost layer of the flat wire stator winding 200 and the V-phase branch inner connecting section 430 of the V-phase copper bar 400 located at the innermost layer of the flat wire stator winding 200 can be correspondingly connected, and the n V-phase branch outer outgoing lines 222 of the V-phase winding located at the outermost layer of the flat wire stator winding 200 and the V-phase branch outer connecting section 410 of the V-phase copper bar 400 located at the outermost layer of the flat wire stator winding 200 are correspondingly connected, so that the connection is simple and compact. Moreover, the V-phase branch external connection end 440 protrudingly arranged on the V-phase branch intermediate bus bar section 420 of the V-phase copper bar 400 can be conveniently connected externally. In addition, the V-phase branch outward connection end 440 may also be disposed at the V-phase branch outer layer connection section 410 or the V-phase branch inner layer connection section 430.

Further, the W-phase winding may include n W-phase branch inner layer outgoing lines 234 adjacent to the innermost layer of the flat-wire stator winding 200, and n W-phase outer layer branch outgoing lines 232 adjacent to the outermost layer of the flat-wire stator winding 200; furthermore, as shown in fig. 6, the W-phase copper bar 500 may include an arc-shaped W-phase branch outer layer connecting section 510 and an arc-shaped W-phase branch inner layer connecting section 530, a W-phase branch intermediate bus section 520 connecting the W-phase branch outer layer connecting section 510 and the W-phase branch inner layer connecting section 530, and a W-phase branch opposite outer connecting end 540 protruding from the W-phase branch inner layer connecting section 530 in the axial direction of the stator core 100; the n W-phase branch outer layer outgoing lines 232 are all connected to the W-phase branch outer layer connecting section 510, and the n W-phase branch inner layer outgoing lines 234 are all connected to the W-phase branch inner layer connecting section 530. Similarly, the n W-phase branch inner layer outgoing lines 234 of the W-phase winding, which are located on the innermost layer of the flat wire stator winding 200, can be correspondingly connected with the W-phase branch inner layer connecting section 530 of the W-phase copper bar 500, which is located on the innermost layer of the flat wire stator winding 200, and the n W-phase branch outer layer outgoing lines 232 of the W-phase winding, which are located on the outermost layer of the flat wire stator winding 200, can be correspondingly connected with the W-phase branch outer layer connecting section 510 of the W-phase copper bar 500, which is located on the outermost layer of the flat wire stator winding 200, so that the connection is simple and compact. Moreover, the W-phase branch external connecting end 540 protrudingly arranged on the W-phase branch external connecting section 510 of the W-phase copper bar 500 can be conveniently connected to the outside. Further, the W-phase arm opposite outside connection end 540 may be provided in the W-phase arm intermediate bus bar section 520 or the W-phase arm inner layer connection section 430.

Moreover, the V-phase branch outer connecting section 410 and the U-phase branch inner connecting section 330 are arranged side by side, the W-phase branch outer connecting section 510 and the V-phase branch inner connecting section 430 are arranged side by side, the U-phase branch outer connecting section 310 and one end of the neutral point copper bar 600 are arranged correspondingly, and the W-phase branch inner connecting section 530 and the other end of the neutral point copper bar 600 are arranged correspondingly, so that the copper bars are arranged more compactly and reasonably, and the end space of the flat wire stator winding is fully utilized.

In addition, the inner sides of the branch inner layer connecting sections of the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 600 are all provided with n branch inner layer notch grooves in parallel, and the outer sides of the branch outer layer connecting sections of the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500 are all provided with n branch outer layer notch grooves in parallel; moreover, the one end of the n branch road inner layer leading-out wires of the U-phase winding, the V-phase winding and the W-phase winding all have branch road inner layer leading-out ends arranged along the axial extension of the stator core, the one end of the n branch road outer layer leading-out wires of the U-phase winding, the V-phase winding and the W-phase winding all have branch road outer layer leading-out ends arranged along the axial extension of the stator core, the n branch road inner layer leading-out ends are laser-welded in the n branch road inner layer notch grooves in a one-to-one correspondence manner, and the n branch road outer layer leading-out ends are laser-welded in the n branch road outer layer notch grooves in a one-to-one correspondence manner. The n branch inner layer notch grooves are arranged on the inner sides of the branch inner layer connecting sections of the copper bars of all phases side by side, so that the n branch inner layer outgoing lines of all the phases of the windings, which are positioned on the innermost side of the flat wire stator winding 200, can be conveniently subjected to one-to-one corresponding laser welding, and the connection is orderly and reliable; and, through set up n outer breach grooves of branch road side by side in the branch road outer linkage segment outside of each looks copper bar, be convenient for with the outer outgoing line one-to-one laser welding of n branch roads that each looks winding is located flat wire stator winding 200's the outside, connect orderly and reliably. Therefore, the three-phase copper bar can be connected with the three-phase outgoing line tightly and reliably. Moreover, when the branch inner layer leading-out wire is laser-welded in the branch inner layer notch groove, the gap of a welding seam between the branch inner layer leading-out end and the groove wall of the branch inner layer notch groove is not more than 0.1mm, so that the branch inner layer leading-out end is firmly laser-welded in the branch inner layer notch groove; in a similar way, the outer leading-out wire of the branch is laser-welded in the outer notch groove of the branch, so that the gap between the outer leading-out end of the branch and the groove wall of the outer notch groove of the branch is not more than 0.1mm, and the outer leading-out end of the branch is firmly laser-welded in the outer notch groove of the branch conveniently. And the three-phase copper bar (comprising a U-phase copper bar, a V-phase copper bar and a W-phase copper bar) and branch outgoing lines (comprising a branch inner layer outgoing line and a branch outer layer outgoing line) of the U-phase winding, the V-phase winding and the W-phase winding are all welded by laser.

Further, as shown in fig. 4, n U-phase branch inner layer notched grooves 304 may be disposed side by side on the inner side of the U-phase branch inner layer connecting section 330, and n U-phase branch outer layer notched grooves 302 may be disposed side by side on the outer side of the U-phase branch outer layer connecting section 310; furthermore, the one end of n U looks branch road inner layer lead-out wire 214 all has the U looks branch road inner layer that sets up along stator core's axial extension to draw forth the end, the one end of n U looks branch road outer layer lead-out wire 212 all has the U looks branch road outer layer that sets up along stator core's axial extension to draw forth the end, n U looks branch road inner layer is drawn forth the end laser welding in n U looks branch road inner layer breach groove 304 correspondingly one-to-one, n U looks branch road outer layer is drawn forth the end laser welding in n U looks branch road outer breach groove 302 correspondingly one-to-one. Therefore, the connection between the U-phase copper bar 300 and the U-phase branch outgoing line can be tight and reliable.

In addition, as shown in fig. 5, n V-phase branch inner layer notched grooves 404 are arranged in parallel on the inner side of the V-phase branch inner layer connecting section 430, and n V-phase branch outer layer notched grooves 402 are arranged in parallel on the outer side of the V-phase branch outer layer connecting section 410; furthermore, one end of each of the n V-phase branch inner lead lines 224 has a V-phase branch inner lead-out end extending in the axial direction of the stator core, one end of each of the n V-phase branch outer lead lines 222 has a V-phase branch outer lead-out end extending in the axial direction of the stator core, the n V-phase branch inner lead-out ends are laser-welded in the n V-phase branch inner notch grooves 404 in a one-to-one correspondence manner, and the n V-phase branch outer lead-out ends are laser-welded in the n V-phase branch outer notch grooves 402 in a one-to-one correspondence manner. Therefore, the connection between the V-phase copper bar 400 and the V-phase branch outgoing line can be tight and reliable.

In addition, n W-phase branch inner layer notched grooves 504 are provided in parallel on the inner side of the W-phase branch inner layer connecting section 530, and n W-phase branch outer layer notched grooves 502 are provided in parallel on the outer side of the W-phase branch outer layer connecting section 510; furthermore, one end of each of the n W-phase branch inner lead wires 234 has a W-phase branch inner lead-out end extending in the axial direction of the stator core, one end of each of the n W-phase branch outer lead wires 232 has a W-phase branch outer lead-out end extending in the axial direction of the stator core, the n W-phase branch inner lead-out ends are laser-welded in the n W-phase branch inner notch grooves 504 in a one-to-one correspondence manner, and the n W-phase branch outer lead-out ends are laser-welded in the n W-phase branch outer notch grooves 502 in a one-to-one correspondence manner. Thus, the connection between the W-phase copper bar 500 and the W-phase branch outgoing line can be tight and reliable.

Moreover, as shown in fig. 8 to 9, each branch inner lead-out wire may include a branch inner bending portion, a branch inner linear section portion respectively disposed at both ends of the branch inner bending portion, a branch inner standard solder joint end disposed at an end of one branch inner linear section portion, and a branch inner lead-out end disposed at an end of the other branch inner linear section portion; and each outer lead-out wire of branch road all includes the outer portion of bending of branch road, locates the outer sharp section of each branch road at the outer portion of bending both ends of branch road respectively, locates the outer standard solder joint end of branch road of the tip of the outer sharp section of branch road to and locate the outer end of branch road of the tip of the outer sharp section of another branch road. Therefore, each branch outgoing line can be set to be in a U-shaped shape, a branch standard welding point end arranged at one end of each branch outgoing line can be welded with other branch lines to form a branch, and a branch outgoing end at the other end of each branch outgoing line can be connected with each phase of copper bar, so that each branch is converged and led out through the copper bar. And the outer leading-out end of the branch is aligned with the inner leading-out end of the branch, the outer standard welding point end of the branch is aligned with the inner standard welding point end of the branch, and the outer leading-out end of the branch is higher than the outer standard welding point end of the branch. Therefore, the branch leading-out ends of the windings of all phases can be located at the same height, the branch standard welding point ends of the windings of all phases are also located at the same height, the height of the branch leading-out ends is larger than that of the branch standard welding point ends, and welding connection with the copper bar is facilitated.

Further, the U-phase branch inner lead-out wire 214 may include a U-phase branch inner bent portion, U-phase branch inner linear sections respectively disposed at both ends of the U-phase branch inner bent portion, a U-phase branch inner standard solder joint end disposed at an end of one U-phase branch inner linear section, and a U-phase branch inner lead-out end disposed at an end of the other U-phase branch inner linear section; as shown in fig. 8, the U-phase branch outer lead 212 may include a U-phase branch outer bent portion 2122, U-phase branch outer straight sections 2124 respectively disposed at both ends of the U-phase branch outer bent portion 2122, a U-phase branch outer standard solder joint end 2128 disposed at an end of one U-phase branch outer straight section 2124, and a U-phase branch outer lead end 2126 disposed at an end of the other U-phase branch outer straight section 2124.

In addition, the V-phase branch inner lead-out wire 224 may include a V-phase branch inner bent portion, V-phase branch inner linear sections respectively disposed at both ends of the V-phase branch inner bent portion, a V-phase branch inner standard solder joint end disposed at an end of one V-phase branch inner linear section, and a V-phase branch inner lead-out end disposed at an end of another V-phase branch inner linear section; moreover, the V-phase branch outer lead-out line 222 may include a V-phase branch outer bending portion, V-phase branch outer straight line sections respectively disposed at two ends of the V-phase branch outer bending portion, a V-phase branch outer standard solder joint end disposed at an end of one V-phase branch outer straight line section, and a V-phase branch outer lead-out end disposed at an end of another V-phase branch outer straight line section.

In addition, the W-phase branch inner lead wire 234 may include a W-phase branch inner bent portion, W-phase branch inner linear sections respectively disposed at both ends of the W-phase branch inner bent portion, a W-phase branch inner standard solder joint end disposed at an end of one W-phase branch inner linear section, and a W-phase branch inner lead end disposed at an end of the other W-phase branch inner linear section; moreover, the W-phase branch outer lead 232 may include a W-phase branch outer bending portion, W-phase branch outer straight line sections respectively disposed at two ends of the W-phase branch outer bending portion, a W-phase branch outer standard solder joint end disposed at an end of one W-phase branch outer straight line section, and a W-phase branch outer lead end disposed at an end of another W-phase branch outer straight line section.

And the outer leading-out end of the branch (comprising an outer leading-out end of a U-phase branch, an outer leading-out end of a V-phase branch and an outer leading-out end of a W-phase branch) is 4-8mm higher than the outer standard welding point end of the branch (comprising an outer standard welding point end of a U-phase branch, an outer standard welding point end of a V-phase branch and an outer standard welding point end of a W-phase branch), and the inner leading-out end of the branch (comprising an inner leading-out end of a U-phase branch, an inner leading-out end of a V-phase branch and an inner leading-out end of a W-phase branch) is 4-8mm higher than the inner standard welding point end of the branch (comprising an inner standard welding point end of a U-phase branch, an inner standard welding point end of a V-phase branch and an inner standard welding point end of a W-phase branch). Therefore, the branch outer layer leading-out end and the branch inner layer leading-out end of the branch leading-out wire of each phase winding are conveniently and correspondingly laser-welded with the outer layer notch groove and the inner layer notch groove of each phase copper bar. And also. The radial distance between the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500 and the innermost ring and the radial distance between the W-phase copper bar 500 and the outermost ring of the flat wire stator winding 200 are all 0-3mm, so that the two side edges of each phase of copper bar respectively have certain distances from the innermost side edge and the outermost side edge of the corresponding flat wire stator winding 200, and the stator can be conveniently assembled subsequently. Moreover, the branch inner layer leading-out ends of the branch inner layer leading-out wires of each phase winding and the branch outer layer leading-out ends of the branch outer layer leading-out wires of each phase winding are protruded out of the corresponding U-phase copper bar, V-phase copper bar or W-phase copper bar by 0-2mm (namely, the branch inner layer leading-out ends of the branch inner layer leading-out wires of the U-phase windings and the branch outer layer leading-out ends of the branch outer layer leading-out wires of the U-phase windings are protruded out of the top surface of the corresponding U-phase copper bar by 0-2mm, the branch inner layer leading-out ends of the branch inner layer leading-out wires of the V-phase windings and the branch outer layer leading-out ends of the branch outer layer leading-out wires of the V-phase windings are protruded out of the top surface of the corresponding V-phase copper bar by 0-2mm), so that enough welding height can be reserved, and the leading-out wires of the branches are conveniently welded on the three-phase copper bar.

Further, as shown in fig. 3, each of the U-phase, V-phase, and W-phase windings may include n adjacent neutral point inner layer outgoing lines 244 provided on the innermost layer of the flat wire stator winding 200, and n adjacent neutral point outer layer outgoing lines 242 provided on the outermost layer of the flat wire stator winding 200; furthermore, as shown in fig. 7, the neutral point copper bar 600 may include an arc-shaped neutral point outer layer connecting section 610 and an arc-shaped neutral point inner layer connecting section 630, and a neutral point intermediate bus section 620 connecting the neutral point outer layer connecting section 610 and the neutral point inner layer connecting section 630, wherein n neutral point inner layer outgoing lines 244 of the U-phase winding, the V-phase winding, and the W-phase winding are sequentially connected to the neutral point inner layer connecting section 630, and n neutral point outer layer outgoing lines 242 of the U-phase winding, the V-phase winding, and the W-phase winding are sequentially connected to the neutral point outer layer connecting section 610. In a similar way, the neutral point outgoing lines 240 of the windings of each phase are separately arranged, the neutral point copper bars 600 are arranged in a bending and segmenting mode, the neutral point outgoing lines 240 are conveniently and separately connected, the connection arrangement is more uniform and reasonable, the branch outgoing lines and the copper bars of each phase are more favorably arranged in a staggered mode, and the occupied space is more favorably reduced. Moreover, the neutral point copper bar 600 is located below the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500, the neutral point outer connecting section 610 and the branch inner connecting section are arranged side by side, and the neutral point inner connecting section 630 and the branch outer connecting section are arranged side by side, so that the neutral point copper bar 600 and each phase of copper bar are arranged in a staggered space, and are compact and ordered.

Further, the U-phase winding may include n adjacent U-phase neutral point inner layer outgoing lines 244 provided at the innermost layer of the flat-wire stator winding 200, and n adjacent U-phase neutral point outer layer outgoing lines 242 provided at the outermost layer of the flat-wire stator winding 200. Also, the V-phase winding may include n adjacent V-phase neutral point inner layer outgoing lines 244 provided at the innermost layer of the flat wire stator winding 200, and n adjacent V-phase neutral point outer layer outgoing lines 242 provided at the outermost layer of the flat wire stator winding 200. Also, the W-phase winding may include n W-phase neutral point inner layer lead wires 244 adjacent to the innermost layer of the flat-wire stator winding 200, and n W-phase neutral point outer layer lead wires 242 adjacent to the outermost layer of the flat-wire stator winding 200. N U-phase neutral point inner layer lead lines 244, n V-phase neutral point inner layer lead lines 244, and n W-phase neutral point inner layer lead lines 244 are connected to the neutral point inner layer connection section 630 in this order, and n U-phase neutral point outer layer lead lines 242, n V-phase neutral point outer layer lead lines 242, and n W-phase neutral point outer layer lead lines 242 are connected to the neutral point outer layer connection section 610 in this order.

Moreover, the neutral point copper bar 600 is located below the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500, the neutral point outer layer connecting section 610, the U-phase inner layer connecting section 330, the V-phase inner layer connecting section 430 and the W-phase inner layer connecting section 530 are all arranged side by side, and the neutral point inner layer connecting section 630, the U-phase outer layer connecting section 310, the V-phase outer layer connecting section 410 and the W-phase outer layer connecting section 510 are all arranged side by side, so that the neutral point copper bar 600 and each phase of copper bars are arranged in a corresponding space, and the occupied space is reduced. Further, the neutral point inner layer outgoing line 244, the neutral point outer layer outgoing line 244, the neutral point inner layer connection section 630, the neutral point outer layer connection section 610, and the neutral point intermediate bus section 620 are coated with an insulating powder layer. Therefore, the neutral point copper bar 600 and the neutral point outgoing line 240 have good insulating performance.

As shown in fig. 7, n neutral point inner layer notch grooves 604 are formed in parallel on the inner side of the neutral point inner layer connecting section 630, and n neutral point outer layer notch grooves 602 are formed in parallel on the outer side of the neutral point outer layer connecting section 610; furthermore, one end of each of the n neutral point inner layer outgoing lines 244 has a neutral point inner layer outgoing end extending in the axial direction of the stator core, one end of each of the n neutral point outer layer outgoing lines 242 has a neutral point outer layer outgoing end extending in the axial direction of the stator core, the n neutral point inner layer outgoing ends are laser-welded to the n neutral point inner layer notch grooves 604 in a one-to-one correspondence, and the n neutral point outer layer outgoing ends are laser-welded to the n neutral point outer layer notch grooves 602 in a one-to-one correspondence. In this way, the neutral point leading-out end of the outermost neutral point leading-out wire 240 of each phase winding is conveniently and correspondingly laser-welded with the outermost neutral point notch groove of the neutral point copper bar 600, and the neutral point leading-out end of the innermost neutral point leading-out wire of each phase winding is also conveniently and correspondingly laser-welded with the innermost neutral point notch groove of the neutral point copper bar 600. Moreover, when the lead-out wire of the inner layer of the neutral point is laser-welded in the notch groove of the inner layer of the neutral point, the welding gap between the lead-out end of the inner layer of the neutral point and the groove wall of the notch groove of the inner layer of the neutral point is not more than 0.1mm, so that the lead-out end of the inner layer of the neutral point is firmly laser-welded in the notch groove of the inner layer of the neutral point; in a similar way, the outer outgoing line of the neutral point is laser-welded in the outer notch groove of the neutral point, so that the welding gap between the outer outgoing end of the neutral point and the groove wall of the outer notch groove of the neutral point is not more than 0.1mm, and the outer outgoing end of the neutral point is firmly laser-welded in the outer notch groove of the neutral point conveniently.

Further, n U-phase neutral point inner layer notch grooves 604, n V-phase neutral point inner layer notch grooves 604, and n W-phase neutral point inner layer notch grooves 604 are provided in parallel on the inner side of the neutral point inner layer connecting section 630, and n U-phase neutral point outer layer notch grooves 602, n V-phase neutral point outer layer notch grooves 602, and n W-phase neutral point outer layer notch grooves 602 are provided in parallel on the outer side of the neutral point outer layer connecting section 610. Furthermore, one end of each of the n U-phase neutral point inner layer outgoing lines 244 has an extended U-phase neutral point inner layer outgoing end, one end of each of the n U-phase neutral point outer layer outgoing lines 242 has an extended U-phase neutral point outer layer outgoing end, the n U-phase neutral point inner layer outgoing ends are laser-welded to the n U-phase neutral point inner layer notched grooves 604 in a one-to-one correspondence, and the n U-phase neutral point outer layer outgoing ends are laser-welded to the n U-phase neutral point outer layer notched grooves 602 in a one-to-one correspondence. In addition, one end of each of the n V-phase neutral point inner layer outgoing lines 244 has an extended V-phase neutral point inner layer outgoing end, one end of each of the n V-phase neutral point outer layer outgoing lines 242 has an extended V-phase neutral point outer layer outgoing end, the n V-phase neutral point inner layer outgoing ends are laser-welded to the n V-phase neutral point inner layer notched grooves 604 in a one-to-one correspondence, and the n V-phase neutral point outer layer outgoing ends are laser-welded to the n V-phase neutral point outer layer notched grooves 604 in a one-to-one correspondence. In addition, one end of each of the n W-phase neutral point inner layer outgoing lines 244 has a W-phase neutral point inner layer outgoing end extending therefrom, one end of each of the n W-phase neutral point outer layer outgoing lines 242 has a W-phase neutral point outer layer outgoing end extending therefrom, the n W-phase neutral point inner layer outgoing ends are laser-welded to the n W-phase neutral point inner layer notched grooves 604 in a one-to-one correspondence, and the n W-phase neutral point outer layer outgoing ends are laser-welded to the n W-phase neutral point outer layer notched grooves 602 in a one-to-one correspondence.

Further, as shown in fig. 9, each of the neutral point inner layer outgoing lines 244 includes a neutral point inner layer bent portion, neutral point inner layer straight line segment portions respectively provided at both ends of the neutral point inner layer bent portion, a neutral point inner layer standard solder joint end provided at an end portion of one of the neutral point inner layer straight line segment portions, and a neutral point inner layer outgoing end provided at an end portion of the other of the neutral point inner layer straight line segment portions; each of the neutral point outer layer outgoing lines 242 includes a neutral point outer layer bending part 2422, neutral point outer layer straight line sections 2424 respectively provided at both ends of the neutral point outer layer bending part 2422, a neutral point outer layer standard solder joint end 2428 provided at an end of one of the neutral point outer layer straight line sections 2424, and a neutral point outer layer outgoing end 2426 provided at an end of the other of the neutral point outer layer straight line sections 2424. Furthermore, a neutral point outer layer lead-out end 2426 is arranged in alignment with the neutral point inner layer lead-out end, a neutral point outer layer standard welding point end 2428 is arranged in alignment with the neutral point inner layer standard welding point end, and the neutral point outer layer lead-out end 2426 is higher than the neutral point outer layer standard welding point end 2428.

Further, the U-phase neutral point inner lead wire 244 may include a U-phase neutral point inner bending portion, U-phase neutral point inner linear sections respectively disposed at both ends of the U-phase neutral point inner bending portion, a U-phase neutral point inner standard solder joint end disposed at an end of one of the U-phase neutral point inner linear sections, and a U-phase neutral point inner lead-out end disposed at an end of the other U-phase neutral point inner linear section; the U-phase neutral point outer layer lead line 242 includes a U-phase neutral point outer layer bent portion, U-phase neutral point outer layer straight line sections respectively provided at both ends of the U-phase neutral point outer layer bent portion, a U-phase neutral point outer layer standard solder joint end provided at an end portion of one of the U-phase neutral point outer layer straight line sections, and a U-phase neutral point outer layer lead end provided at an end portion of the other of the U-phase neutral point outer layer straight line sections.

Further, the V-phase neutral point inner lead wire 244 may include a V-phase neutral point inner bent portion, V-phase neutral point inner linear sections respectively provided at both ends of the V-phase neutral point inner bent portion, a V-phase neutral point inner standard solder joint end provided at an end of one V-phase neutral point inner linear section, and a V-phase neutral point inner lead-out end provided at an end of the other V-phase neutral point inner linear section; further, the V-phase neutral point outer layer lead line 242 may include a V-phase neutral point outer layer bent portion, V-phase neutral point outer layer straight line sections respectively provided at both ends of the V-phase neutral point outer layer bent portion, a V-phase neutral point outer layer standard solder joint end provided at an end portion of one of the V-phase neutral point outer layer straight line sections, and the V-phase neutral point outer layer lead end provided at an end portion of the other of the V-phase neutral point outer layer straight line sections.

Further, the W-phase neutral point inner layer lead-out wire 244 may include a W-phase neutral point inner layer bent portion, W-phase neutral point inner layer straight line sections provided at both ends of the W-phase neutral point inner layer bent portion, respectively, a W-phase neutral point inner layer standard solder terminal provided at an end portion of one W-phase neutral point inner layer straight line section, and a W-phase neutral point inner layer lead-out terminal provided at an end portion of the other W-phase neutral point inner layer straight line section; the W-phase neutral point outer layer lead wire 242 includes a W-phase neutral point outer layer bent portion, W-phase neutral point outer layer straight sections provided at both ends of the W-phase neutral point outer layer bent portion, a W-phase neutral point outer layer standard pad terminal provided at an end of one of the W-phase neutral point outer layer straight sections, and a W-phase neutral point outer layer lead terminal provided at an end of the other of the W-phase neutral point outer layer straight sections.

Moreover, the axial distance between the neutral point copper bar 600 and the standard welding spot end of the inner layer of the neutral point is 1-5mm, and the axial distance between the neutral point copper bar 600 and the standard welding spot end of the outer layer of the neutral point is also 1-5mm, so that the neutral point copper bar 600 and the neutral point outgoing line of each phase of winding have a proper distance, and the welding connection is facilitated. Moreover, the axial distances between the U-phase copper bar 300, the V-phase copper bar 400 and the W-phase copper bar 500 and the neutral point copper bar 600 are all 1-5mm, so that the three-phase copper bar and the neutral point copper bar 600 are kept at proper distances and are convenient to weld. In addition, the radial distance between the neutral point copper bar 600 and the innermost ring and the radial distance between the neutral point copper bar and the outermost ring of the flat wire stator winding 200 can be set to be 0-3mm, so that the two side edges of the neutral point copper bar 600 and the innermost side edge and the outermost side edge of the flat wire stator winding 200 have certain distances, and the stator can be conveniently assembled subsequently. In addition, the neutral point inner layer leading-out end of the neutral point inner layer leading-out wire of each phase winding and the neutral point outer layer leading-out end of the neutral point outer layer leading-out wire protrude out of the surface of the corresponding neutral point copper bar by 0-2mm (namely the neutral point inner layer leading-out end of the neutral point inner layer leading-out wire of the U-phase winding, the V-phase winding or the W-phase winding and the neutral point outer layer leading-out end of the neutral point outer layer leading-out wire protrude out of the top surface of the corresponding neutral point copper bar by 0-2mm), enough welding height can be reserved, and each neutral point leading-out wire can be conveniently welded to the neutral point copper bar.

In the above-mentioned flat wire stator outlet end structure, each looks copper bar (including U looks copper bar 300, V looks copper bar 400, W looks copper bar 500) all can include converge district (branch road outer joint section, branch road inner joint section, branch road middle confluence section promptly) and external district (branch road external connection end promptly), wherein converge district and adopt laser welding to connect with many looks outgoing lines of each looks and converge, and external district then provides the function of the external connection of stator three-phase. The bus area of the copper bar and the welding end part of the flat wire stator are stuck with powder and dripped with paint together, so that the connection reliability of the outgoing line and the copper bar is ensured; the outer connection area is covered and protected by a high-temperature resistant material before powder dripping is adhered, and the protective cover is taken down after the powder dripping is adhered, so that the subsequent external connection is not influenced.

In addition, the above n may have a value of 2, 3, 4, 5, etc. In this embodiment, can establish n to 2 for U phase winding, V phase winding and W phase winding all include 4 branch circuits that connect in parallel, and every branch circuit has a flat copper line to do neutral point lead-out wire and a flat copper line to do three-phase lead-out wire at the winding tip, therefore every phase includes 4 neutral point lead-out wires and 4 looks lead-out wires, and whole stator includes 12 neutral point lead-out wires and 4U phase branch circuit lead-out wires, 4V phase branch circuit lead-out wires and 4W phase branch circuit lead-out wires. 12 neutral point lead-out wires are connected by a neutral point copper bar, 4U looks branch circuit lead-out wires are connected by a U looks copper bar, 4V looks branch circuit lead-out wires are connected by a V looks copper bar, 4W looks branch circuit lead-out wires are connected by a W looks copper bar. The neutral point copper bar is respectively welded with the 12 neutral point outgoing lines in a laser mode, and the whole body and the end portion of the stator are stuck with powder and dripped with paint.

Furthermore, the utility model also provides a flat wire motor, include as above flat wire stator end structure of being qualified for the next round of competitions. The three-phase external connection function is provided while the branch circuits of each phase are converged, the connection reliability of the three-phase outgoing line can be improved while the height of the end part of the winding is reduced, and the insulating property of the outlet end of the stator is also ensured. The copper bar has a simple structure, and the convergence area and the external connection area of the three-phase copper bar are clear; the copper bar and the flat copper wire are welded by laser, so that the heights of the neutral point connecting wire and the phase lead-out wire are reduced, and the end space is saved; the end part of the stator and the copper bar are adhered with powder and dripped with paint, so that the connection reliability of the copper bar is enhanced, and the insulation performance of the stator is ensured; the external connection area of the three-phase copper bar is protected and cannot be stuck with powder and drip paint, so that the external connection is facilitated.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a flat wire stator outlet end structure which characterized in that includes:

2. The flat wire stator outlet end structure according to claim 1, wherein the U-phase winding, the V-phase winding, and the W-phase winding each include n adjacent branch inner layer outgoing lines provided at an innermost layer of the flat wire stator winding, and n adjacent branch outer layer outgoing lines provided at an outermost layer of the flat wire stator winding;

3. The flat wire stator outlet end structure according to claim 2, wherein n branch inner layer notch grooves are formed in the inner sides of the branch inner layer connecting sections of the U-phase copper bar, the V-phase copper bar and the W-phase copper bar side by side, and n branch outer layer notch grooves are formed in the outer sides of the branch outer layer connecting sections of the U-phase copper bar, the V-phase copper bar and the W-phase copper bar side by side;

4. The flat-wire stator outlet end structure according to claim 3, wherein each of the branch inner lead-out wires includes a branch inner bent portion, a branch inner straight-line section respectively provided at both ends of the branch inner bent portion, a branch inner standard solder joint end provided at an end of one of the branch inner straight-line sections, and the branch inner lead-out end provided at an end of the other of the branch inner straight-line sections;

5. The flat wire stator outlet end structure of claim 4, wherein the outlet end of the outer layer of the branch is 4-8mm higher than the standard welding point end of the outer layer of the branch;

6. The flat wire stator outlet end structure according to claim 2, wherein the U-phase winding, the V-phase winding and the W-phase winding each include n adjacent neutral point inner layer outgoing lines provided at an innermost layer of the flat wire stator winding, and n adjacent neutral point outer layer outgoing lines provided at an outermost layer of the flat wire stator winding;

7. The flat wire stator outlet end structure according to claim 6, wherein n neutral point inner layer notch grooves are arranged side by side on the inner side of the neutral point inner layer connecting section, and n neutral point outer layer notch grooves are arranged side by side on the outer side of the neutral point outer layer connecting section;

8. The flat-wire stator outlet end structure according to claim 7, wherein each of the neutral point inner layer outgoing lines includes a neutral point inner layer bent portion, neutral point inner layer straight line sections provided at both ends of the neutral point inner layer bent portion, respectively, a neutral point inner layer standard solder joint end provided at an end portion of one of the neutral point inner layer straight line sections, and the neutral point inner layer outgoing end provided at an end portion of the other of the neutral point inner layer straight line sections;

9. The flat wire stator outlet end structure of claim 8, wherein the axial distance between the neutral point copper bar and the neutral point inner layer standard solder joint end is 1-5 mm;

10. A flat wire electric machine comprising a flat wire stator outlet end structure according to any one of claims 1 to 9.