CN112564326A

CN112564326A - Stator, motor and vehicle

Info

Publication number: CN112564326A
Application number: CN201910909550.8A
Authority: CN
Inventors: 陈汉锡; 虞阳波; 郑军洪; 孙国伟
Original assignee: Anhui Welling Auto Parts Co Ltd
Current assignee: Anhui Welling Auto Parts Co Ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2021-03-26

Abstract

The invention provides a stator, a motor and a vehicle, wherein the stator comprises: the stator core is provided with a plurality of stator teeth, and the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator core; the first coil is wound on one of the stator teeth and comprises a first outgoing line and a second outgoing line; the second coil is wound on the other stator tooth and comprises a third outgoing line and a fourth outgoing line; the second outgoing line extends to the third outgoing line and is connected with the third outgoing line through the connecting portion, so that the first coil and the second coil are connected in series. According to the invention, the second outgoing line of the first coil is prolonged, and the second outgoing line of the first coil is used as the gap bridge line between the first coil and the second coil, so that the gap bridge line additionally arranged in the prior art is omitted, the connection operation of the gap bridge line and the first coil is reduced, the production and manufacturing efficiency is improved, the number of connection points is reduced, and the improvement of the connection reliability between the coils is facilitated.

Description

Stator, motor and vehicle

Technical Field

The invention relates to the technical field of motors, in particular to a stator, a motor comprising the stator and a vehicle comprising the motor.

Background

At present, when two coils of a motor stator are connected in series, a gap bridge wire is generally arranged between the two coils, a structure for fixing the gap bridge wire is arranged on an insulating end plate of the stator, the gap bridge wire is firstly fixed on the structure, then two ends of the gap bridge wire are respectively connected with outgoing wires of the two coils, the winding operation is complex, the efficiency is low, the number of connection points is too many, and the connection reliability between the coils is low.

Disclosure of Invention

In order to solve at least one of the above technical problems, an object of the present invention is to provide a stator.

Another object of the present invention is to provide an electric machine comprising the above stator.

It is a further object of the present invention to provide a vehicle including the above-described motor.

In order to achieve the above object, a first aspect of the present invention provides a stator, including: the stator comprises a stator core, a stator core and a stator core, wherein the stator core is provided with a plurality of stator teeth, and the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator core; the first coil is wound on one of the stator teeth and comprises a first outgoing line and a second outgoing line; the second coil is wound on the other stator tooth and comprises a third outgoing line and a fourth outgoing line; the second outgoing line extends to the third outgoing line and is connected with the third outgoing line through a connecting part, so that the first coil is connected with the second coil in series.

According to the stator provided by the technical scheme of the first aspect of the invention, the second outgoing line of the first coil is extended to extend to the third outgoing line of the second coil, and then the second outgoing line of the first coil is connected with the third outgoing line of the second coil through the connecting part, so that the first coil and the second coil are connected in series, and the second outgoing line of the first coil serves as a gap bridge line between the first coil and the second coil, so that an additional gap bridge line in the prior art is omitted, the connection operation of the gap bridge line and the first coil is reduced, the production and manufacturing efficiency is improved, the number of connecting points is reduced, and the connection reliability between the coils is improved.

In addition, the stator in the above technical solution provided by the present invention may further have the following additional technical features:

in the above-described aspect, the stator core is provided with an insulating structure, the connection portion includes a terminal insertion groove provided in the insulating structure and a crimp terminal mounted in the terminal insertion groove, and the end of the second lead wire and the end of the third lead wire are at least partially crimped in the terminal insertion groove by the crimp terminal and are electrically connected to each other.

The connecting portion comprises a terminal insertion groove and a crimping terminal, the terminal insertion groove is formed in an insulating structure of the stator core and plays a role in containing and limiting the second outgoing line and the third outgoing line, at least one part of the tail end of the second outgoing line and at least one part of the tail end of the third outgoing line are pressed in the terminal insertion groove by the crimping terminal, the position stability of the crimping terminal is guaranteed, meanwhile, the second outgoing line and the third outgoing line are electrically connected, and therefore the first coil and the second coil are connected in series.

In the above technical solution, the crimp terminal is a piercing terminal.

The press-connection terminal is a puncture type terminal, so that in the process that the press-connection terminal is pressed to the second outgoing line and the third outgoing line, the insulation coating films on the surfaces of the second outgoing line and the third outgoing line can be punctured, and the electrical connection of the second outgoing line and the third outgoing line is realized. This connection method, while forming the electrical connection, simultaneously installs the conductive portion of the connection site into the terminal insertion groove, is quick to connect and can effectively insulate.

In the above technical solution, the terminal insertion slot is provided with a notch through which the tail end of the second outgoing line and/or the tail end of the third outgoing line extend; the second coil is provided with a vertical plane, the vertical plane passes through the central axis of the stator core, and an included angle theta between the normal of the plane where the notch is located and the vertical plane is in the range of 60-120 degrees.

Under the general condition, the stator of motor need install just can use in the metal casing to the stator is through lateral wall and casing cooperation, and it is too near to the casing to need to avoid the end of second lead-out wire and third lead-out wire, and in order to prevent that the distance undersize between metal casing and the stator lateral wall leads to insulating distance not enough, also need to avoid simultaneously that the end of second lead-out wire and third lead-out wire and the insulating distance between the coil are not enough. And the tail ends of the second lead wire and the third lead wire can extend out through the notches of the terminal insertion grooves, so that the insulation safety distance between the tail ends of the second lead wire and the third lead wire and the shell and the coil can be controlled by controlling the direction of the notches. As a result of research, an included angle θ formed between a normal line of a plane where the notch of the terminal insertion slot is located and a perpendicular plane (the perpendicular plane passing through the central axis of the stator core) of the second coil is set to satisfy the following condition: theta is more than or equal to 60 degrees and less than or equal to 120 degrees, such as 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees and the like, so that the end of the second outgoing line and the end of the third outgoing line can be effectively ensured to have better insulation safety distance with the shell and the coil.

Of course, the slots may also be arranged radially outwardly of the stator core.

In the above technical solution, an insulating member is provided in the terminal insertion slot, and the insulating member covers the crimp terminal, the end of the second lead wire, and the end of the third lead wire.

In some applications of the electric machine, the stator may be exposed to some conductive medium. Since the terminal, the end of the second lead wire and the end of the third lead wire are all conductive parts in the terminal insertion groove, the insulating part is arranged in the terminal insertion groove, and the insulating part sealing cover is in pressure connection with the single body, the end of the second lead wire and the end of the third lead wire, so that the potential safety hazard of electric leakage can be avoided.

In the above technical solution, the insulating member is an insulating sealant, and the terminal insertion groove is filled with the insulating sealant.

The insulating part adopts insulating sealed glue, can be full of each corner clearance of terminal insertion groove, plays reliable insulating sealed effect to the structure in the terminal insertion groove, and the operating mode is comparatively simple to can form comparatively regular structure.

In any one of the above-described embodiments, the number of the terminal insertion grooves is equal to the number of the stator teeth, and the plurality of terminal insertion grooves are provided at intervals in the circumferential direction of the stator core.

Since the coils are wound on each stator tooth in general, the number of the coils is generally equal to that of the stator teeth, the number of the terminal insertion grooves is equal to that of the stator teeth, and the terminal insertion grooves are arranged at intervals along the circumferential direction of the stator core, so that the lead wires of the coils on each stator tooth can be pressed into the terminal insertion grooves for fixing. Therefore, the coils on any two teeth can be fixed in series, so that the circuit connection of the stator is more free and flexible, and redundant terminal insertion grooves can be left unused. Simultaneously, this scheme also makes stator insulation assembly's structure comparatively regular, the machine-shaping of being convenient for.

In any of the above technical solutions, the stator includes a plurality of phase windings, each phase winding includes a plurality of coils connected in series in sequence, and any two directly connected coils are the first coil and the second coil respectively.

The stator comprises a plurality of phase windings, and each phase winding comprises a plurality of coils which are sequentially connected in series, namely the same-phase windings are connected in series to finally form two terminals. Two coils which are connected randomly and directly are respectively a first coil and a second coil, namely, the two coils which are connected randomly and directly in each phase of winding adopt the series connection method of the first coil and the second coil in the technical scheme, so that the production and manufacturing efficiency of the stator winding is effectively improved, the production and manufacturing cost is reduced, and the connection reliability of the winding is improved.

Specifically, for the case where the number of coils per phase winding is two, the first and fourth lead-out wires form two terminals of the phase winding. In the case where the number of coils per phase winding is larger than three, since the coils located at the intermediate portions are directly connected to the two coils, the coils at these portions serve as the first coil when directly connected to one of the two directly connected coils and serve as the second coil when directly connected to the other of the two directly connected coils, thereby ensuring that the same phase winding eventually has two terminals.

In any one of the above technical solutions, the outer side of the second outgoing line is wrapped with an insulating layer.

The insulating layer wraps the outer side of the second outgoing line, reliable insulation between the gap bridge wires in different phases and the coil can be effectively guaranteed, a structure for guaranteeing that the gap bridge wires in different phases have sufficient insulation gaps does not need to be arranged on the end portion of the stator, and therefore the end portion of the stator is small, and miniaturization of the motor is facilitated. Specifically, the insulating layer can be the insulated adhesive tape or the insulated adhesive tape pasted on the second lead-out wire, also can be the insulating coating of coating or spraying on the second lead-out wire, also can be the insulation support of suit on the second lead-out wire, can penetrate insulation support from the end of a thread of second lead-out wire during the assembly for the cover is equipped with insulation support on the second lead-out wire after the assembly is accomplished, can guarantee the sufficient insulation of the gap bridge wire of different phases and coil, and the reliability is high.

In any of the above technical solutions, the magnet wire of the first coil is a copper magnet wire; and/or the magnet wires of the second coil are copper magnet wires.

The electromagnetic wire of the first coil and/or the second coil is a copper electromagnetic wire, so that the conductive performance is good, the deformation is easy, the winding operation is convenient, and the cost is low. In addition, for the copper electromagnetic wire, the puncture type terminal is adopted, compared with a common connection mode such as soldering, the size of the stator is favorably reduced, and further the motor is favorably miniaturized.

In any one of the above-described embodiments, the first lead line, the second lead line, the third lead line, and the fourth lead line are sequentially distributed in a circumferential direction of the stator core.

The first outgoing line, the second outgoing line, the third outgoing line and the fourth outgoing line are sequentially distributed along the circumferential direction of the stator core, so that the second outgoing line and the third outgoing line are two outgoing lines which are closest to each other between the first coil and the second coil, the length of the second outgoing line is favorably shortened, and the difficulty of winding operation is favorably reduced.

In any one of the above-described aspects, the second lead-out wire and the main body portion of the first coil are formed of one electromagnetic wire.

The second outgoing line and the main body portion of the first coil are formed of one electromagnetic wire, that is: the second lead-out wire is not broken and is extended to the third lead-out wire, therefore the second lead-out wire has acted as the gap bridge line between first coil and the second coil, has realized that the series connection of first coil and second coil links to each other, and has saved the connection operation of first coil and gap bridge line, has also saved the crimping terminal between first coil and the gap bridge line, has both been favorable to improving assembly efficiency, is favorable to reduction in production cost again. Of course, the second outgoing line and the main body portion of the first coil may also be formed by two electromagnetic wires, the second outgoing line and the wire end of the main body portion of the first coil are connected together by welding, binding or other methods, and then the second outgoing line is extended to the third outgoing line and is electrically connected with the third outgoing line through the connecting portion.

In any one of the above technical solutions, the stator core is provided with insulating members on both axial end faces, and the stator teeth are provided with insulating members.

The insulating parts are arranged on the two axial end faces of the stator core, and the insulating parts are arranged on the stator teeth, so that the reliable insulation between the stator coil and other structures is effectively ensured. The two parts of insulating parts form an insulating assembly, the insulating parts can be formed separately and assembled on the stator iron core, and an integrated structure can be formed by the insulating parts and the stator iron core in an injection molding mode. Further, the terminal insertion groove is provided in the insulator on the end face in the axial direction of the stator core.

In any one of the above technical solutions, the stator core has a central hole penetrating along an axial direction thereof, and the plurality of stator teeth are provided on a hole wall of the central hole.

A plurality of stator teeth are arranged on the hole wall of the middle hole of the stator core, so that the rotor is assembled on the radial inner side of the stator core, the size of the motor is reduced, and the motor is miniaturized.

In any of the above technical solutions, the stator is a concentrated winding stator.

The stator is concentrated winding stator, and then the motor is concentrated winding motor, and the homophase coil of concentrated winding motor can the equipartition on the stator circumference, if adopt parallelly connected mode, need connect the operation again through the end of a thread of each coil of artificial identification, very easily produce the mistake, lead to the product bad, consequently adopt the mode of connection of this application to realize series connection, be favorable to showing the wiring degree of difficulty that reduces concentrated winding motor, and then improve the production manufacturing efficiency of concentrated winding motor to reduce its manufacturing cost. And the volume and the weight of the concentrated winding motor are smaller, so that the concentrated winding motor is particularly suitable for products such as automobiles and the like which are designed to be light, and further the cost and the power consumption of the products are reduced.

An aspect of the second aspect provides a motor, including: the stator according to any one of the aspects of the first aspect; and a rotor cooperating with the stator.

The motor provided by the second aspect of the present invention includes the stator according to any one of the first aspect of the present invention, so that all the advantages of any one of the above-mentioned technical solutions are provided, and details are not repeated herein.

An aspect of the third aspect of the invention provides a vehicle including: a vehicle body; and the motor according to the second aspect, which is installed in the vehicle body.

The vehicle provided by the third aspect of the present invention includes the motor according to the second aspect, so that all the advantages of any one of the above-mentioned technical solutions are provided, and details are not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a stator according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a stator according to an embodiment of the present invention;

FIG. 3 is a schematic representation of the stator wiring according to one embodiment of the present invention;

FIG. 4 is a schematic view of a partial structure of a stator according to an embodiment of the present invention;

fig. 5 is a partial structural view of a stator according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:

1, a stator core, 11 stator teeth, 2 a first coil, 21 a first lead wire, 22 a second lead wire, 3 a second coil, 31 a third lead wire, 32 a fourth lead wire, 33 a vertical plane, 4 a connecting part, 41 a terminal insertion groove, 411 a notch, 412 a normal line, 42 a crimping terminal, 6 an insulating sleeve, 7 an insulating component and 8 insulating sealant;

wherein the arrow in fig. 1 indicates the insertion direction of the crimp terminal.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A stator, a motor, and a vehicle according to some embodiments of the present invention are described below with reference to fig. 1 to 5.

Example one

A stator, comprising: a stator core 1, a first coil 2 and a second coil 3, as shown in fig. 1 to 3.

Specifically, the stator core 1 is provided with a plurality of stator teeth 11, as shown in fig. 3. The plurality of stator teeth 11 are provided at intervals in the circumferential direction of the stator core 1.

And a first coil 2 wound around one of the stator teeth 11, the first coil 2 including a first lead wire 21 and a second lead wire 22.

And a second coil 3 wound around the other stator tooth 11, the second coil 3 including a third lead wire 31 and a fourth lead wire 32.

Wherein the second outgoing line 22 extends to the third outgoing line 31 and is connected to the third outgoing line 31 through the connection portion 4, as shown in fig. 1 and 2, so that the first coil 2 is connected in series with the second coil 3, as shown in fig. 3.

In the stator provided by the embodiment of the first aspect of the present invention, the second outgoing line 22 of the first coil 2 is extended to extend to the third outgoing line 31 of the second coil 3, and then the second outgoing line 22 of the first coil 2 is connected to the third outgoing line 31 of the second coil 3 through the connection portion 4, so that the first coil 2 and the second coil 3 are connected in series, and the second outgoing line 22 of the first coil 2 serves as a gap bridge line between the first coil 2 and the second coil 3, thereby omitting an additional gap bridge line in the prior art, reducing the connection operation between the gap bridge line and the first coil 2, improving the production and manufacturing efficiency, reducing the number of connection points, and facilitating the improvement of the connection reliability between the coils.

It is understood that each lead-out wire refers to a portion from which both ends of the coil are led out, which is not wound around the stator teeth 11, but is used for connection with other structures.

Further, the second outgoing wire 22 and the main body portion of the first coil 2 are formed of one electromagnetic wire.

The second outgoing wire 22 and the main body portion of the first coil 2 are formed of one electromagnetic wire, that is: the second outgoing line 22 continuously extends to the third outgoing line 31, so that the second outgoing line 22 serves as a gap bridge line between the first coil 2 and the second coil, the first coil 2 and the second coil are connected in series, the connection operation of the first coil 2 and the gap bridge line is omitted, and a crimping terminal between the first coil 2 and the gap bridge line is omitted, so that the assembly efficiency is improved, and the production cost is reduced.

Of course, the second outgoing line 22 and the main body portion of the first coil 2 may also be formed by two magnet wires, and the second outgoing line 22 and the head of the main body portion of the first coil 2 are connected together by welding, binding, or other methods, and then the second outgoing line 22 is extended to the third outgoing line 31 and electrically connected to the third outgoing line 31 through the connection portion 4.

Specifically, the stator core 1 is provided with an insulating structure, and the connection portion 4 includes a terminal insertion groove 41 provided on the insulating structure and a crimp terminal 42 mounted in the terminal insertion groove 41, as shown in fig. 1 and 2. The distal ends of the second lead wires 22 and the distal ends of the third lead wires 31 are at least partially pressed in the terminal insertion grooves 41 by the crimp terminals 42 and electrically connected, as shown in fig. 2 to 4.

The connection portion 4 includes a terminal insertion groove 41 and a crimp terminal 42, the terminal insertion groove 41 is provided on the insulating structure of the stator core 1, and plays a role in accommodating and limiting the second lead wire 22 and the third lead wire 31, and the crimp terminal 42 presses at least a part of the end of the second lead wire 22 and at least a part of the end of the third lead wire 31 in the terminal insertion groove 41, so that the position stability is ensured, and at the same time, the electrical connection between the second lead wire 22 and the third lead wire 31 is realized, and the series connection between the first coil 2 and the second coil 3 is realized.

Wherein the insulation structure is provided on the axial end surface of the stator core 1, which facilitates the connection of the second lead wire 22 with the third lead wire 31, and the terminal insertion groove 41 can be processed by the insulation structure of the stator itself, which facilitates both the processing and the assembling of the crimp terminal 42.

Further, the crimp terminal 42 is a pierce-type terminal.

When the crimp terminal 42 is a puncture type terminal, the insulation coating on the surfaces of the second lead wire 22 and the third lead wire 31 can be punctured when the crimp terminal 42 is pressed against the second lead wire 22 and the third lead wire 31, thereby electrically connecting the second lead wire 22 and the third lead wire 31. This connection mode, which simultaneously mounts the conductive portion of the connection site into the terminal insertion groove 41 while forming the electrical connection, is quick to connect and can effectively insulate.

Example two

In addition to the first embodiment, the terminal insertion groove 41 is provided with a notch 411 through which the end of the second lead wire 22 and/or the end of the third lead wire 31 protrude, as shown in fig. 4. The second coil 3 has a perpendicular bisector which passes through the central axis of the stator core 1, as shown in fig. 4. The angle theta between the normal 412 to the plane of the slot 411 and the median plane 33 is in the range 60 deg. to 120 deg..

In general, the stator of the motor needs to be installed in a metal casing for use, and the stator is matched with the casing through an outer side wall, so that it is necessary to avoid that the ends of the second outgoing line 22 and the third outgoing line 31 are too close to the casing, so as to prevent the insufficient insulation distance caused by the too small distance between the metal casing and the outer side wall of the stator, and at the same time, it is necessary to avoid the insufficient insulation distance between the ends of the second outgoing line 22 and the third outgoing line 31 and the coil. Since the ends of the second lead wire 22 and the third lead wire 31 can be extended through the notch 411 of the terminal insertion groove 41, the insulation safety distance between the ends of the second lead wire 22 and the third lead wire 31 and the case or the coil can be controlled by controlling the direction of the notch 411.

As a result of the study, an angle θ formed between a normal 412 of a plane where the notch 411 of the terminal insertion slot 41 is located and a perpendicular plane (the perpendicular plane passing through the central axis of the stator core 1) of the second coil 3 is set to satisfy the following condition: theta is more than or equal to 60 degrees and less than or equal to 120 degrees, such as 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees and the like, so that the tail ends of the second outgoing line 22 and the third outgoing line 31 can be effectively ensured to have better insulation safety distance with the shell and the coil.

Of course, the slot 411 may also be provided radially outward of the stator core 1, as shown in fig. 1 and 2. The angle θ is not limited to the above range.

EXAMPLE III

In addition to the first or second embodiment, an insulating member is provided in the terminal insertion groove 41, and covers the crimp terminal 42, the end of the second lead wire 22, and the end of the third lead wire 31.

In some applications of the electric machine, the stator may be exposed to some conductive medium. Since the terminal 42, the end of the second lead wire 22, and the end of the third lead wire 31 are all conductive members pressed into the terminal insertion groove 41, the terminal insertion groove 41 is provided with an insulator, and the insulator cap is pressed onto the unit, the end of the second lead wire 22, and the end of the third lead wire 31, thereby preventing the potential safety hazard of electric leakage.

Wherein the insulating member is an insulating sealant 8, and the insulating sealant 8 is filled in the terminal insertion groove 41, as shown in fig. 5.

The insulating part adopts insulating sealed glue 8, can be full of each corner clearance of terminal insertion groove 41, plays reliable insulating sealed effect to the structure in the terminal insertion groove 41, and the operating mode is comparatively simple to can form comparatively regular structure.

Of course, the insulation may take other forms, such as silicone, wood insulation, etc.

Example four

In addition to any of the above embodiments, the second outgoing line 22 is further wrapped with an insulating layer.

The outer side of the second outgoing line 22 is wrapped with an insulating layer, so that reliable insulation between the gap bridge wire and the coil in different phases can be effectively ensured; and a structure for ensuring that gap bridge wires of different phases have sufficient insulation gaps is not required to be arranged on the end part of the stator, so that the end part of the stator is smaller, and the miniaturization of the motor is facilitated.

Specifically, the insulating layer may be an insulating tape or an insulating tape pasted on the second outgoing line 22, or an insulating coating coated or sprayed on the second outgoing line 22, or an insulating sleeve 6 sleeved on the second outgoing line 22, where the insulating sleeve 6 is sleeved on the second outgoing line 22, as shown in fig. 1 to 4.

During assembly, the insulating sleeve 6 can penetrate through the wire head of the second outgoing wire 22, so that the insulating sleeve 6 is sleeved on the second outgoing wire 22 after assembly is completed, sufficient insulation between the gap bridge wire and the coil in different phases can be guaranteed, and reliability is high.

Specifically, the magnet wires of the first coil 2 are copper magnet wires, and the magnet wires of the second coil 3 are copper magnet wires.

The electromagnetic wires of the first coil 2 and the second coil 3 are copper electromagnetic wires, so that the conductive performance is good, the deformation is easy, the winding operation is convenient, and the cost is low.

In addition, for the copper electromagnetic wire, the puncture type terminal is adopted, compared with a common connection mode such as soldering, the size of the stator is favorably reduced, and further the motor is favorably miniaturized.

Of course, the magnet wires of the first coil 2 and the second coil 3 are not limited to copper magnet wires, and may be aluminum magnet wires, silver magnet wires, or the like.

Further, the first lead wire 21, the second lead wire 22, the third lead wire 31, and the fourth lead wire 32 are sequentially distributed in the circumferential direction of the stator core 1, as shown in fig. 3.

The first lead wire 21, the second lead wire 22, the third lead wire 31, and the fourth lead wire 32 are sequentially distributed in the circumferential direction of the stator core 1, and therefore the second lead wire 22 and the third lead wire 31 are two lead wires having the closest distance between the first coil 2 and the second coil 3, which is advantageous for shortening the length of the second lead wire 22 and reducing the difficulty of the winding operation.

Further, the stator includes several phase windings, each of which includes a plurality of coils connected in series in sequence, as shown in fig. 3. Any two coils directly connected are the first coil 2 and the second coil 3, respectively, as shown in fig. 3.

The stator comprises a plurality of phase windings, and each phase winding comprises a plurality of coils which are sequentially connected in series, namely the same-phase windings are connected in series to finally form two terminals. Any two directly connected coils are respectively the first coil 2 and the second coil 3, that is, any two directly connected coils in each phase of winding adopt the series connection method of the first coil 2 and the second coil 3 in the previous embodiment, so that the production and manufacturing efficiency of the stator winding is effectively improved, the production and manufacturing cost is reduced, and the connection reliability of the same phase of winding is improved.

Specifically, for the case where the number of coils per phase winding is two, the first and fourth lead-out

wires

21 and 32 form two terminals of the winding. In the case where the number of coils per phase winding is larger than three, since the coils located at the intermediate portions are directly connected to the two coils, the coils at these portions serve as the first coil 2 when directly connected to one of the two directly connected coils and serve as the second coil 3 when directly connected to the other of the two directly connected coils, thereby ensuring that the same phase winding eventually has two terminals. Also, the second outgoing line 22 may continuously extend across several stator teeth 11 to the third outgoing line 31 according to the position of the coil, as shown in fig. 1 and 2.

Further, the number of the terminal insertion grooves 41 is equal to the number of the stator teeth 11, and the plurality of terminal insertion grooves 41 are provided at intervals in the circumferential direction of the stator core 1.

Since the coils are generally wound around each stator tooth 11, the number of coils is generally equal to the number of stator teeth 11, the number of terminal insertion slots 41 is equal to the number of stator teeth 11, and the terminal insertion slots 41 are spaced apart in the circumferential direction of the stator core 1, so that the lead wires of the coils on each stator tooth 11 can be securely pressed into the terminal insertion slots 41. Thus, the coils on any two teeth can be fixed in series, so that the stator can be more freely and flexibly connected, and the redundant terminal insertion grooves 41 can be left unused. Simultaneously, this scheme also makes stator insulation assembly's structure comparatively regular, the machine-shaping of being convenient for.

Such as: as shown in fig. 1 and 2, the number of the stator teeth 11 and the number of the terminal insertion grooves 41 are 12, and are uniformly distributed along the circumferential direction of the stator core 1, wherein 9 terminal insertion grooves 41 are combined with the crimp terminal 42 to form the connection portion 4, and the remaining 3 terminal insertion grooves 41 are left empty. The stator comprises three-phase windings, each phase of winding is provided with 2 wire ends (or 2 wiring ends) after being connected in series, and the total 6 wire ends are used for being connected with other structures except the stator to form a circuit structure of the motor.

Specifically, the stator core 1 is provided with insulators on both axial end faces, and the stator teeth 11 are provided with insulators, as shown in fig. 1 and 2.

The insulating parts are arranged on the two axial end faces of the stator core 1, and the insulating parts are arranged on the stator teeth 11, so that the reliable insulation between the stator coil and other structures is effectively ensured. The two parts of the insulating parts form an insulating assembly 7, the insulating parts can be formed separately and assembled on the stator core 1, and an integrated structure can be formed with the stator core 1 in an injection molding mode. Further, the terminal insertion grooves 41 are provided in the insulator on the axial end face of the stator core 1.

The stator core 1 has a central hole passing through along the axial direction thereof, and a plurality of stator teeth 11 are provided on the wall of the central hole, as shown in fig. 1 and 2.

The plurality of stator teeth 11 are arranged on the hole wall of the middle hole of the stator core 1, so that the rotor is assembled on the radial inner side of the stator core 1, the size of the motor is reduced, and the motor is miniaturized.

Further, the stator is a concentrated winding stator.

Of course, the stator may also be a distributed winding stator.

EXAMPLE five

An electric machine comprising: a stator and a rotor as in any one of the embodiments of the first aspect. Wherein the rotor is matched with the stator.

The motor provided by the embodiment of the second aspect of the present invention includes the stator of any one of the embodiments of the first aspect, so that all the advantages of any one of the embodiments described above are achieved, and details are not repeated herein.

Such as: the rotor is sleeved inside the stator and can rotate relative to the stator.

EXAMPLE six

A vehicle, comprising: a vehicle body and a motor as in the embodiment of the second aspect, mounted in the vehicle body.

The vehicle provided by the embodiment of the third aspect of the present invention includes the motor of the embodiment of the second aspect, so that all the advantages of any of the above embodiments are provided, and details are not repeated herein.

The following description is given with reference to specific examples and is to be compared with the prior art.

In the product application of the motor industry, the miniaturization and lightweight design of the motor plays an important role in reducing the product cost and the power consumption, so that the motor is always a research continuously developed in the industry. In particular, in the automotive industry, concentrated winding motors with smaller volume and weight are generally used to reduce the weight of the whole automobile.

In a motor product, coils of a stator need to be reasonably connected to form windings of all phases to normally operate, and the coils of the same phase are usually connected in parallel or in series. Under the general condition, the coils with the same phase of the concentrated winding motor are uniformly distributed on the circumference of the stator, and if a parallel connection mode is adopted, the wire ends of the coils need to be identified manually and then connected, so that errors are easy to generate, and the product is poor. Therefore, most manufacturers will choose to connect coils of the same phase in series.

In the prior art, the coil series connection of the concentrated winding stator is usually a non-broken line series connection, and a line connected between two coils is called a gap bridge line. To ensure sufficient insulation gaps between the gap wires of different phases, it is often necessary to increase the height of the insulation end plates to pull the parallel distances of the gap wires of different phases apart. The consequence of this arrangement is that the stator end is bulky and disadvantageous for motor miniaturization.

Therefore, the invention provides the motor, and the stator of the motor has the advantages of small end part volume, high production efficiency of bridge wire connection and high reliability.

Concretely, the electric rotating machine is composed of a stator and a rotor, the stator is provided with a stator core 1, an insulation assembly 7 and a coil, the stator core 1 is provided with a middle hole which penetrates along the axial direction of the stator core, a plurality of stator teeth 11 which are arranged at intervals along the circumferential direction of the middle hole are arranged, and a stator slot is defined between every two adjacent stator teeth 11. The insulation assemblies 7 are arranged on two end faces of the stator core 1. The plurality of coils are wound on the stator teeth 11 provided with the insulation component 7, and each coil is provided with two outgoing lines (namely outgoing lines) which are respectively a first outgoing line and a second outgoing line. Wherein said first outgoing line of coil a (i.e. second outgoing line 22 of first coil 2) is arranged continuously across a plurality of stator teeth 11 and is finally connected with said second outgoing line of coil B of the other in-phase winding (i.e. third outgoing line 31 of second coil 3) through connection 4.

The connecting portion 4 is composed of a terminal insertion groove 41 formed in the insulating assembly 7 and a piercing terminal installed in the terminal groove, and the first outlet end of the coil a and the second outlet end of the coil B are piercing-connected by the piercing terminal. Wherein the first outlet of the coil a passes through an insulating sleeve 6.

The invention utilizes the first outgoing line of the coil A as the gap bridge line, reduces the connecting operation of the gap bridge line and the coil A, and improves the production and manufacturing efficiency. In addition, the insulation sleeve 6 can be penetrated from the wire head of the first wire outlet of the coil A, so that sufficient insulation between the bridge wires of different phases and the coil is ensured, and the reliability is high. And since there is no need to provide a structure for securing an insulation gap at the stator end, the stator end is also relatively small.

In order to further improve the manufacturing efficiency, the present invention puts the ends of the first outlet wire of the coil a and the second outlet wire of the other same-phase coil B into the terminal insertion groove 41, and inserts the piercing terminal into the terminal insertion groove 41. In this process, the piercing terminal makes electrical connection by piercing a paint film on the surface of the coil magnet wire. This connection mode, which simultaneously mounts the conductive portion of the connection site into the terminal insertion groove 41 while forming the electrical connection, is quick to connect and can effectively insulate.

Fig. 2 illustrates a perspective view of a specific example of a stator and its bridge wire. And obtaining the stator and the bridge wire thereof after the operation process.

Fig. 3 illustrates an expanded view of a specific example of a stator gap bridge wire connection structure. From this figure, the connection structure of the bridgewire of the present invention can be easily understood, that is: the first outgoing line of the coil A is continuously arranged across a plurality of stator teeth 11 and is finally connected with the second outgoing line of the coil B of the other in-phase winding through a connecting part 4, and an insulating sleeve 6 penetrates through the first outgoing line.

Fig. 4 illustrates a schematic view of a stator gap bridge wire connection 4 of another specific example.

Generally, the stator of the motor needs to be installed in a metal casing for use, and the stator is matched with the casing through the outer diameter, so that the situation that the tail ends of the first outgoing line and the second outgoing line are too close to the casing needs to be avoided, and the situation that the insulation distance is insufficient due to the fact that the distance between the tail ends of the first outgoing line and the tail ends of the second outgoing line and the outer diameter of the stator is too small is avoided. It is of course also necessary to avoid insufficient insulation distance from the coil. And because the ends of the first outgoing line and the second outgoing line are fixed on the opening (namely the notch 411) of the terminal insertion slot 41, the insulation safety distance between the ends of the first outgoing line and the second outgoing line and the shell and the coil can be controlled by controlling the opening direction.

An included angle θ formed between a center line of the opening of the terminal insertion slot 41 (i.e., a normal line perpendicular to the plane of the slot 411 and passing through the center of the slot 411) and a symmetric center line of the coil B (i.e., a straight line passing through the winding center of the second coil 3, located on a perpendicular plane to the central axis of the stator core 1, and perpendicular to the central axis of the stator core 1) is set to satisfy the following condition: theta is more than or equal to 60 degrees and less than or equal to 120 degrees so as to ensure that the tail ends of the first outgoing line and the second outgoing line have better insulation safety distance with the shell and the coil.

Fig. 5 illustrates a schematic view of a stator gap bridge wire connection 4 of a specific example.

In some motor applications, the stator may be exposed to some conductive medium. Because in the connecting portion 4, the first wire outlet and the second wire outlet of the puncture type terminal and the punctured paint film for realizing electrical conduction are conductive parts, when the terminal is applied to the environment, the terminal insertion groove 41 is filled with the insulating sealant 8 which completely covers the puncture type terminal and the wire outlet end, so that the potential safety hazard of electric leakage can be avoided.

In summary, according to the stator, the motor and the vehicle provided by the invention, the second outgoing line of the first coil is extended to extend to the third outgoing line of the second coil, and then the second outgoing line of the first coil is connected with the third outgoing line of the second coil through the connection portion, so that the first coil and the second coil are connected in series, and the second outgoing line of the first coil serves as a bridge line between the first coil and the second coil, so that an extra bridge line in the prior art is omitted, the connection operation of the bridge line and the first coil is reduced, the production and manufacturing efficiency is improved, the number of connection points is reduced, and the connection reliability between the coils is improved.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator, comprising:

the stator comprises a stator core, a stator core and a stator core, wherein the stator core is provided with a plurality of stator teeth, and the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator core;

the first coil is wound on one of the stator teeth and comprises a first outgoing line and a second outgoing line;

the second coil is wound on the other stator tooth and comprises a third outgoing line and a fourth outgoing line;

the second outgoing line extends to the third outgoing line and is connected with the third outgoing line through a connecting part, so that the first coil is connected with the second coil in series.

2. The stator according to claim 1,

the stator core is provided with an insulation structure, the connection part comprises a terminal insertion groove arranged on the insulation structure and a crimping terminal arranged in the terminal insertion groove, and the tail end of the second outgoing line and the tail end of the third outgoing line are at least partially pressed in the terminal insertion groove by the crimping terminal and are electrically connected.

3. The stator according to claim 2,

the crimping terminal is a piercing terminal.

4. The stator according to claim 2,

the terminal insertion groove is provided with a notch for the tail end of the second outgoing line and/or the tail end of the third outgoing line to extend out;

the second coil is provided with a vertical plane, the vertical plane passes through the central axis of the stator core, and an included angle theta between the normal of the plane where the notch is located and the vertical plane is in the range of 60-120 degrees.

5. The stator according to claim 2,

and an insulating piece is arranged in the terminal insertion groove, and covers the crimping terminal, the tail end of the second outgoing line and the tail end of the third outgoing line.

6. The stator according to claim 5,

the insulating piece is insulating sealant, and the insulating sealant is filled in the terminal insertion groove.

7. The stator according to any one of claims 2 to 6,

the number of the terminal insertion grooves is equal to the number of the stator teeth, and the plurality of terminal insertion grooves are arranged at intervals in the circumferential direction of the stator core.

8. The stator according to any one of claims 1 to 6,

the stator comprises a plurality of phase windings, each phase winding comprises a plurality of coils which are connected in series in sequence, and any two directly connected coils are the first coil and the second coil respectively.

9. The stator according to any one of claims 1 to 6,

the second outgoing line is wrapped by an insulating layer.

10. The stator according to any one of claims 1 to 6,

the first outgoing line, the second outgoing line, the third outgoing line, and the fourth outgoing line are sequentially distributed along a circumferential direction of the stator core.

11. The stator according to any one of claims 1 to 6,

the second lead-out wire and the main body portion of the first coil are formed of one electromagnetic wire.

12. An electric machine, comprising:

the stator of any one of claims 1 to 11; and

and the rotor is matched with the stator.

13. A vehicle, characterized by comprising:

a vehicle body; and

the electric machine of claim 12, mounted in the vehicle body.