WO2021253906A1

WO2021253906A1 - Flat wire vertical-winding electric motor winding, electric motor stator, and flat wire vertical-winding electric motor

Info

Publication number: WO2021253906A1
Application number: PCT/CN2021/082827
Authority: WO
Inventors: 刘延海; 陈旭文; 郑艳双; 李广举
Original assignee: 天津松正汽车部件有限公司
Priority date: 2020-06-19
Filing date: 2021-03-24
Publication date: 2021-12-23
Also published as: CN111614183A

Abstract

Provided are a flat wire vertical-winding electric motor winding, an electric motor stator, and a flat wire vertical-winding electric motor. Each phase of a vertical-winding coil group of the flat wire vertical-winding electric motor winding comprises M vertical-winding coil units, wherein M ≥ 2, and M is an integer; each vertical-winding coil unit comprises N vertical-winding coils, N-1 long span wires, one wire incoming end and one wire outgoing end; and the number P of tooth portions of a stator core spanned by the long span wires is greater than 2, and for the long span wires of the vertical-winding coil units, (P-4) is a multiple of 3. Each parallel branch of the flat wire vertical-winding electric motor winding provided in the present application is composed of a group of continuous and complete vertical-winding coils, there are only lead-out wires or neutral points in the whole electric motor that are respectively gathered together to be soldered (there is no neutral point at a corner joint), and the winding has no redundant solder points, thereby reducing the connection complexity and realizing automated production; and since a vertical winding is used, the thermal resistance is greatly reduced, the heat dissipation capability is improved, and the torque density of an electric motor is increased.

Description

Flat wire vertical winding motor winding, motor stator and rectangular wire vertical winding motor

This application requires the priority of the patent application submitted to the State Intellectual Property Office of China on June 19, 2020, the application number is 202010568191.7, and the invention title is "a rectangular wire vertical wound motor winding, motor stator and rectangular wire vertical wound motor". right.

Technical field

The embodiment of the present invention relates to the technical field of motors, in particular to a rectangular wire vertical winding motor winding, a motor stator and a rectangular wire vertical winding motor.

Background technique

With the continuous development of new energy vehicles, the requirements for the motor part of the vehicle that provide the main power source are getting higher and higher. Especially in the field of new energy passenger vehicles, the torque and power of the motor are required more and more when the space becomes more and more compact. Higher. Therefore, how to maximize torque and power density with a smaller volume has become a difficulty and challenge in motor design.

At present, the most widely used in the market is the block-type concentrated winding. Compared with other types of motors, the block-type concentrated winding has the advantage that the height of the end winding is relatively low, but its disadvantages are also obvious, mainly including: the stator block process is complex , The size consistency is poor after the block, and the iron core block reduces the performance of the motor; the separate busbar structure of the stator winding is unreliable and increases the size of the winding end. At the same time, the busbar structure increases the cost of the motor.

It can be seen that although the block-type concentrated winding has been widely used, how to use its advantages to avoid its shortcomings is the main direction of motor design.

Summary of the invention

The invention provides a rectangular wire vertical wound motor winding, a motor stator and a rectangular wire vertical wound motor. Each parallel branch of the rectangular wire vertical wound motor winding is composed of a set of continuous and complete vertical winding coils. The overall motor has only Lead wires or neutral points are gathered together for welding (there is no neutral point during corner connection), and the winding has no redundant welding points, which reduces the complexity of the connection and realizes automated production; due to the use of vertical winding, it is also large The thermal resistance is greatly reduced, the heat dissipation capacity is improved, and the torque density of the motor is improved.

The embodiment of the present invention provides a flat-wire vertical winding motor winding, including a three-phase vertical winding coil group; each phase of the vertical winding coil group includes M vertical winding coil units, M≥2, and M is an integer;

Wherein, each of the vertical winding coil units includes: N vertical winding coils, N-1 long crossover wires, 1 wire-in end and 1 wire-out end, N≥2, N=number of slots of the stator core/ 3/n, where n is the number of parallel branches of the flat-wire vertical winding motor windings, and n>2; the long crossover is formed between the two vertical winding coils;

The winding direction of the vertical winding coil of the vertical winding coil unit is the same as or opposite to the direction in which the long span is formed;

The number P of the teeth of the stator core spanned by the long span is greater than two.

Further, each of the vertical winding coils includes a plurality of first groove inner parts, a plurality of second groove inner parts, and a plurality of turning parts. Partly arranged in two adjacent slots on the stator core;

The shape of the turning part includes: a circular arc forming the tangent of each straight line segment of the turning part, wherein the turning radius of the turning part R=(2*t+w+x)/2, where R is the result The turning radius of the turning part, t is the thickness of the insulating paper, w is the width of the tooth part, and x is the gap variable between the part in the groove and the tooth part;

Alternatively, the shape of the turning part further includes: a rectangle with rounded corners tangent to each straight line forming the turning part;

Alternatively, the shape of the turning portion further includes: inferior arcs that are not tangent to the straight line segments forming the turning portion.

Further, each of the vertical winding coil units is wound by a coil conductor with one of the teeth to form a first vertical winding coil, and the other teeth are wound at a predetermined distance to form a second vertical winding. Coil, until the P-th vertical winding coil is formed;

Wherein, the preset distance is the length of the long span, the preset distance=polar distance*2D, D is a constant, and D≥1, and D is an integer.

Further, the number of parallel branches of the vertical winding motor winding of the rectangular wire is 2, and the long spanning distance of the vertical winding coil unit is pole pitch*2.

Further, the number of slots of the stator core is 30, the number of parallel branches of the rectangular wire vertical winding motor winding is n=2, and the number of the vertical winding coil units in the vertical winding coil group per phase M=2 ；

The vertical winding coil unit is wound by a coil conductor with one tooth to form the first vertical winding coil of the vertical winding coil unit, and the other tooth is wound at a distance of pole pitch *2 to form The second vertical winding coil of the vertical winding coil unit until the fifth vertical winding coil of the vertical winding coil unit is formed.

Further, the inlet end of each vertical winding coil unit is connected to a phase lead wire, and the outlet end is connected to a neutral point; or, the inlet end of each vertical winding coil unit is connected to a neutral point. Point, the outlet end is connected to the phase outlet.

Further, the inlet ends of each vertical winding coil unit in the vertical winding coil group of each phase are all connected to form a phase inlet end, and the inlet ends of each vertical winding coil unit The outlet ends are all connected to form a one-phase outlet end;

In the three-phase vertical winding coil group, the inlet end of the U phase is connected to the outlet end of the V phase, the inlet end of the V phase is connected to the outlet end of the W phase, and the W phase The inlet end of the U phase is connected to the outlet end of the U phase, and the outlet end of any two phases is connected to the phase outlet at the position where the inlet end is connected.

An embodiment of the present invention also provides a motor stator, including: a stator iron core and the rectangular wire vertical winding motor winding described in any of the above embodiments;

The stator core is cylindrical and includes Q teeth and a plurality of T-slot wedges; Q teeth extend radially inward and are evenly distributed along the circumference, and two adjacent teeth are formed One slot, the number of the slots is Q, Q is a multiple of 3, and Q is an integer; the T-shaped slot wedges are arranged between two adjacent vertical winding coils in the same slot;

The winding of the rectangular wire vertical wound motor is formed by winding the tooth part with a coil conductor according to a preset rule, wherein the winding of the rectangular wire vertical wound motor includes a three-phase vertical winding coil group, and each phase of the vertical winding coil group includes M vertical winding coil units, M≥2, and M being an integer; each of the vertical winding coil units includes N vertical winding coils, N-1 long crossover wires, 1 wire-in end and 1 wire-out end, N≥2, N=Q/3/n, n is the number of parallel branches of the rectangular wire vertical winding motor winding, and n>2.

Further, the stator core further includes insulating paper; the insulating paper is arranged in the slot and wraps the vertical winding coil; the insulating paper wraps the vertical winding in the slot in a three-sided manner. Winding the coil, or, the insulating paper wraps the vertical coil in the groove in the form of surrounding on four sides.

An embodiment of the present invention also provides a rectangular wire vertical winding motor, which includes the motor stator described in any of the foregoing embodiments.

The present invention provides a rectangular wire vertical wound motor winding, a motor stator and a rectangular wire vertical wound motor. Each phase of the vertical winding coil group of the rectangular wire vertical winding motor winding includes M vertical winding coil units; each vertical winding coil unit includes : N vertical winding coils, N-1 long crossover wires, 1 inlet end and 1 outlet end, N≥2, N=the number of slots of the stator core/3/n, n is a rectangular wire vertical winding motor The number of parallel branches of the winding, and n>2; a long span is formed between two vertical winding coils; the number of teeth P of the stator core spanned by the long span is greater than 2. Each parallel branch of the flat-wire vertical wound motor windings provided in this application is composed of a set of continuous and complete vertical winding coils. The overall motor has only the lead wire or the neutral point that are gathered together for welding (there is no corner connection). Neutral point), the winding has no redundant solder joints, which reduces the complexity of the connection and realizes automated production; due to the vertical winding, the thermal resistance is greatly reduced, the heat dissipation capacity is improved, and the torque density of the motor is improved. .

Description of the drawings

Figure 1 is a structural diagram of a motor stator with two parallel branches provided by an embodiment of the present invention;

2 is a schematic structural diagram of a one-phase motor winding of a motor stator with two parallel branches according to an embodiment of the present invention;

3 is a schematic diagram of a neutral winding unit of a motor stator with two parallel branches provided by an embodiment of the present invention;

4 is a schematic diagram of a vertical winding coil provided by an embodiment of the present invention;

Figure 5 (a) is a schematic diagram of a turning portion provided by an embodiment of the present invention;

Figure 5(b) is a schematic diagram of another turning portion provided by an embodiment of the present invention;

Figure 5(c) is a schematic diagram of yet another turning part provided by an embodiment of the present invention;

Fig. 6 is a schematic diagram of a vertical winding coil gap provided by an embodiment of the present invention;

Fig. 7 is a structural diagram of another motor stator with two parallel branches provided by an embodiment of the present invention;

Figure 8 is a schematic diagram of a T-slot wedge provided by an embodiment of the present invention;

Figure 9 (1) is a schematic diagram of a vertical winding coil surrounded by insulating paper on three sides according to an embodiment of the present invention;

Figure 9 (2) is a schematic diagram of an insulating paper provided by an embodiment of the present invention;

Figure 9 (3) is a schematic diagram of a vertical winding coil surrounded by insulating paper provided by an embodiment of the present invention;

Fig. 9(4) is a schematic diagram of another insulating paper provided by an embodiment of the present invention.

Among them, the above drawings include the following reference signs:

100. Stator core; 101, tooth part; 102, slot; 200, rectangular wire vertical winding motor winding; 201, vertical winding coil group; 300, vertical winding coil unit; 301, vertical winding coil; 3011, in the first slot Part; 3012, the inner part of the second groove; 3013, the turning part; 302, the long span line; 60, the T-slot wedges; 70, the end; 80, the insulating paper.

detailed description

The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for ease of description, the drawings only show a part but not all of the structure related to the present invention.

The invention provides a flat wire vertical winding motor winding. Fig. 1 is a structural diagram of a motor stator with two parallel branches provided by an embodiment of the present invention; Fig. 2 is a structural diagram of a one-phase motor winding of a motor stator with two parallel branches provided by an embodiment of the present invention; 3 is a schematic diagram of a neutral winding unit of a motor stator with two parallel branches provided by an embodiment of the present invention.

Wherein, in conjunction with Figures 1 to 3, the rectangular wire vertical winding motor winding 200 includes a three-phase vertical winding coil group 201; each phase of the vertical winding coil group 201 includes M vertical winding coil units 300, M≥2, and M is an integer ; Specifically, three-phase refers to U-phase, V-phase and W-phase, the motor stator in Figure 1 and Figure 2 is two parallel branches, so each phase vertical winding coil group 201 includes two vertical winding coil units 300, That is, U1, U2; V1, V2; W1, W2 marked in Fig. 1, that is, 303-U1, 303-U2; 304-U1, 304-U2 marked in the schematic diagram of the U phase in Fig. 2.

Wherein, each vertical winding coil unit 300 includes: N vertical winding coils 301, N-1 long crossover wires 302, one inlet end 303 and one outlet end 304, N≥2, N=of the stator core The number of slots/3/n, where n is the number of parallel branches of the rectangular vertical winding motor winding 200, and n>2; a long span 302 is formed between the two vertical winding coils 301. Illustratively, taking two parallel branches as an example, see Fig. 3, where n is 2, the number of slots in the stator core 100 of the motor stator is 30, then the number of vertical winding coils 301 of the vertical winding unit 300 is N= 30/3/2=5, the number of long crossover lines 302 is 4.

The vertical winding direction of the vertical winding coil 301 of the vertical winding coil unit 300 is the same as or opposite to the direction in which the long jumper 302 is formed. The number P of teeth of the stator core spanned by the long span line 302 is greater than two.

Exemplarily, referring to Fig. 3, the coil conductor starts to be wound from the wire inlet end 303-U1, the winding direction of the vertical winding coil 301 is counterclockwise, and the first vertical winding coil 301 is completed counterclockwise to form a long span line 302, and then continue to wind the second vertical winding coil 301. The winding direction of the vertical winding coil 301 shown in FIG. It is clockwise, so I won't repeat it here.

Optionally, each vertical winding coil unit 300 is wound by a coil conductor with one tooth part 101 to form a first vertical winding coil 301, and another tooth part 101 is wound at a preset distance to form a second vertical winding coil 301. Based on the above-mentioned regularity, the teeth 101 are continuously wound at a preset distance until the P-th vertical winding coil 301 is formed to complete the winding of a vertical winding coil unit 300; wherein, the preset distance is the length of the long span wire 302, The preset distance=polar distance*2D, D is a constant, and D≥1, and D is an integer.

Specifically, the pole pitch refers to the number of slots in the stator core divided by the number of poles. For example, if the number of slots in the stator core shown in Figure 1 is 30 and the number of poles is 20, the pole pitch is 30/20=1.5 .

Optionally, the number of parallel branches of the rectangular vertical-wound motor winding 200 is 2, and the distance of the long jumper 302 of the vertical-wound coil unit 300 is the pole pitch*2.

Optionally, as shown in Figures 1 to 3, the number of slots in the stator core is 30, the number of parallel branches of the rectangular vertical winding motor winding is n=2, and the vertical winding unit in the vertical winding coil group 201 of each phase 300 number M=2; the vertical winding coil unit 300 is wound by a coil conductor with one tooth part 101 to form the first vertical winding coil 301 of the vertical winding coil unit 300, and the other tooth part is wound at a distance of pole pitch *2 101. The second vertical winding coil 301 of the vertical winding coil unit 300 is formed until the fifth vertical winding coil 301 of the vertical winding coil unit 300 is formed.

In the following, a specific embodiment is used to specifically introduce the windings of the above-mentioned flat-wire vertical wound motor of the two parallel branches.

Refer to Figure 1-Figure 3, Figure 1-Figure 3 is a structural diagram of a motor stator with two parallel branches, the number of slots in the stator core 100 N=30, the vertical winding coil unit 300 in the vertical winding coil group 201 of each phase The number M=2, the number of parallel branches of the rectangular wire vertical wound motor winding 200 is 2, and the coil conductor forming the vertical wound coil unit 300 is a rectangular wire; as shown in FIG. 2, one of the vertical wound coil units 300 is composed of a coil conductor The inlet end 303-U1 enters the second slot, and winds the first tooth 101 between the first slot and the second slot in the radial direction from the outside to the inside counterclockwise to form the vertical winding coil unit 300 The first vertical winding coil 301; the coil conductor protrudes from the first slot and is spaced counterclockwise with 6 teeth 101 into the seventh slot, and winds the seventh slot in the radial direction from the outside to the inside in the counterclockwise direction. The seventh tooth part 101 between the slot and the eighth slot forms the second vertical winding coil 301 of the vertical winding coil unit 300; the coil conductor extends from the seventh slot and is spaced 6 teeth counterclockwise. The portion 101 enters the 13th slot, and the 13th tooth 101 between the 13th slot and the 14th slot is wound counterclockwise in the radial direction from the outside to the inside to form the third vertical winding unit 300 Winding the coil 301; the coil conductor extends from the 13th slot and is spaced counterclockwise with 6 teeth 101 into the 11th slot, and winds the 19th slot and the 20th in the radial direction from the outside to the inside. The 19th tooth part 101 between the two slots forms the fourth vertical winding coil 301 of the vertical winding coil unit; the coil conductor extends from the 19th slot and is spaced in the counterclockwise direction by 4 teeth 101 into the 25th And the 25th tooth 101 between the 25th slot and the 26th slot is wound counterclockwise in the radial direction from the outside to the inside to form the fifth vertical winding coil 301 of the vertical winding unit 300, and The terminal 304-U1 extends from the 25th slot. Through the above-mentioned continuous winding method, the vertical winding coil unit 300 shown in FIG. 3 is formed, and the length of the long span 302 in the vertical winding coil unit 300 is the length of four teeth 101.

In the same way, the other vertical winding coil unit 300 shown in FIG. 2 enters the slot 102 of the stator core from the wire inlet end 303-U2 of the coil conductor, and starts winding according to the same principle, and then extends out the wire end 304 -U2, I won’t repeat it here.

It should be noted that the above-mentioned winding direction of the vertical winding coil unit can be changed from counterclockwise to clockwise, and the winding from the outside to the inside in the radial direction can be changed to the winding from the inside to the outside, which will not be repeated here.

Fig. 4 is a schematic diagram of a vertical winding coil provided by an embodiment of the present invention. Fig. 5(a) is a schematic diagram of a turning part provided by an embodiment of the present invention. Figure 5(b) is a schematic diagram of another turning portion provided by an embodiment of the present invention. Fig. 5(c) is a schematic diagram of yet another turning part provided by an embodiment of the present invention.

Optionally, as shown in FIG. 4, each vertical winding coil 301 includes a plurality of first groove inner portions 3011, a plurality of second groove inner portions 3012, and a plurality of turning portions 3013. The plurality of first groove inner portions 3011 and A plurality of second slot inner portions 3012 are arranged in two adjacent slots on the stator core.

Specifically, referring to FIG. 4, the turning portion 3013 of the vertical winding coil 301 is matched with the end portion 70 formed by stacking thin steel plates, so that the large radius arc of the turning portion 3013 and the end portion 70 formed by stacking thin steel plates can be in a limited space. Increase the utilization rate of effective materials as much as possible to reduce the total volume of the stator and increase the torque and power density of the motor.

As shown in Figure 5 (a)-Figure 5 (c), the shape of the turning portion 3013 includes: a circular arc forming the turning portion 3013 tangent to each straight line segment, wherein the turning radius of the turning portion 3013 R=(2* t+w+x)/2, R is the turning radius of the turning part 3013, t is the thickness of the insulating paper, w is the width of the tooth part 101, and x is the gap variable between the part in the groove and the tooth part; or, the turning part The shape of 3013 also includes: a rectangle with rounded corners tangent to the straight sections forming the turning portion 3013; or, the shape of the turning portion 3013 further includes: inferior arcs where the straight sections forming the turning portion 3013 are not tangent.

Specifically, the shape of the turning portion 3013 shown in FIG. 5(a) is a large arc shape. Such a circular arc is formed by tangent to the straight line segments forming the turning portion 3013. Experimental tests show that the use of Such a large arc is used to wind the vertical winding coil 301, and the deformation of the large arc bending structure at both ends of the vertical winding coil 301 can cause the gap between the vertical winding coils 301 to be reduced by about 50% compared with other structures, such as FIG. 6 is a schematic diagram of the vertical winding coil gap provided by the embodiment of the present invention. The gap d shown in FIG. 6 is the gap between the vertical winding coils 301 described above.

The size of the turning radius of the turning portion 3013 shown in Figure 5(a) can be obtained by the formula R=(2*t+w+x)/2, the unit of the turning radius R is millimeters mm, see Figure 4, x is vertical The value of the gap between the inner part of the slot of the winding coil and the tooth part of the vertical winding coil is a variable, which can be set according to actual needs. The value of the turning radius of the turning portion 3013 in the present application is larger than the radius of the turning portion of the usual motor coil. Compared with the small arc near rectangular structure at the coil end, the large arc structure at the coil end can be reduced by adopting a large turning radius. The winding thickness caused by small bending accumulation is difficult to control and the winding paint film is easily damaged due to accumulation.

The shape of the turning portion 3013 shown in FIG. 5(b) is composed of a rectangle with rounded corners, that is, the rectangle is bent to form the turning portion 3013 shown in FIG. 5(b).

The shape of the turning portion 3013 may also be the shape shown in FIG. 5(c), that is, the turning portion 3013 may be a minor arc shape, and is a minor arc that is not tangent to the tangent sections of the straight line segments forming the turning portion 3013.

Optionally, the inlet end 303 of each vertical winding coil unit 300 is connected to the phase lead wire, and the outlet end 304 is connected to the neutral point; or, the inlet end 303 of each vertical winding coil unit 300 is connected to the neutral point, and the outlet end 304 connect phase lead wire.

Specifically, the incoming wire end 303 and the outgoing wire end 304 can be connected to the phase lead wire and the neutral point respectively, or can be connected to the neutral point and the phase lead wire separately, which can be converted as required during actual use.

Optionally, the inlet end 303 of each vertical winding coil unit 300 in the vertical winding coil group 201 of each phase is connected to form an inlet end 303 of one phase, and the outlet end 304 of each vertical winding coil unit 300 is all connected. Phase connection to form a one-phase outlet end 304; in the three-phase vertical winding coil group 201, the U-phase inlet end 303 is connected to the V-phase outlet end 304, and the V-phase inlet end 303 is connected to the W-phase outlet end 304 phase is connected, the W-phase incoming end 303 is connected to the U-phase outgoing end 304, and any two-phase outgoing end 304 is connected to the incoming end 303 at the position where the phase outgoing wire is connected.

Fig. 7 is a structural diagram of another motor stator with two parallel branches provided by an embodiment of the present invention.

Illustratively, taking the motor windings of the two parallel branches shown in FIG. 7 as an example, the U-phase vertical winding coil group 201 includes two vertical winding coil units 300, and the inlet ends U1-303 of the U1 phase and the U2 phase The incoming terminal U2-303 is connected to form the incoming terminal 303 of the U phase, the outgoing terminal U1-304 of the U1 phase is connected to the outgoing terminal U2-304 of the U2 phase to form the outgoing terminal 304 of the U phase; V-phase and W-phase are also connected according to the above method; then the U-phase incoming terminal 303 is connected to the V-phase outgoing terminal 304, the V-phase incoming terminal 303 is connected to the W-phase outgoing terminal 304, and the W-phase The inlet end 303 is connected with the outlet end 304 of the U phase to form a delta connection; the position where the inlet end 303 of the U phase is connected to the outlet end 304 of the V phase is connected to the phase outlet line. Similarly, the inlet line of the V phase The position where the terminal 303 is connected to the outlet terminal 304 of the W phase is connected to the phase lead wire, and the position where the inlet terminal 303 of the W phase is connected to the outlet terminal 304 of the U phase is connected to the phase lead wire.

The flat-wire vertical winding motor winding provided by the present invention has the following advantages: each parallel branch of the flat-wire vertical winding motor winding is composed of a set of continuous and complete vertical winding coils, and the overall motor has only lead wires or neutral points. They are assembled together for welding (there is no neutral point during corner connection), and the winding has no redundant welding points, which reduces the complexity of the connection and realizes automatic production; due to the vertical winding, the thermal resistance is also greatly reduced. The heat dissipation capacity is improved, and the torque density of the motor is improved.

An embodiment of the present invention also provides a motor stator. Referring to Figs. 1 and 2, the motor stator includes: a stator iron core 100 and the rectangular wire vertical winding motor winding 200 described in any of the above embodiments; the stator iron core 100 is round Cylindrical shape, including Q tooth parts 101 and a plurality of T-shaped groove wedges 60; Q tooth parts 101 extend radially inward and are evenly distributed along the circumference. Two adjacent tooth parts 101 form a slot 102, The number is Q, Q is a multiple of 3, and Q is an integer; FIG. 8 is a schematic diagram of a T-slot wedge provided by an embodiment of the present invention. As shown in FIG. 8, the T-slot wedge 60 is arranged in the same groove 102 Between two adjacent vertical winding coils 301.

The rectangular wire vertical winding motor winding 200 is formed by winding the tooth portion 101 with a coil conductor according to a preset rule. The rectangular wire vertical winding motor winding 200 includes a three-phase vertical winding coil group 201, and each phase vertical winding coil group 201 includes M vertical winding coil groups. Coil winding unit 300, M≥2, and M is an integer; each vertical winding coil unit 300 includes N vertical winding coils 301, N-1 long jumper wires 302, 1 inlet end 303 and 1 outlet end 304 , N≥2, N=Q/3/n, n is the number of parallel branches of the rectangular vertical winding motor winding 200, and n>2.

Specifically, referring to FIG. 8, a T-shaped slot wedge 60 is provided between two adjacent vertical winding coils 301 in the same slot 102, and the material of the T-shaped slot wedge 60 is an insulating material. The T-shaped slot wedge 60 is a radially fixed structure of the coil winding. The provision of the T-shaped slot wedge 60 not only simplifies the structure, but also ensures the stability of the coil in the radial direction.

In the embodiment of the present invention, the T-shaped slot wedges and the stator coils form a whole circle through interference fit under the iron core support, which increases the radial rigidity and avoids the movement of the vertical winding coils; in addition, the T A similar tenon-and-mortise structure formed by the cooperation of the shaped slot wedges and the vertical winding coils makes it possible to effectively prevent the vertical winding coils from popping out in the radial direction.

Figure 9 (1) is a schematic diagram of an insulating paper provided by an embodiment of the present invention surrounding a vertical winding coil on three sides; Figure 9 (2) is a schematic diagram of an insulating paper provided by an embodiment of the present invention; Figure 9 (3) is an implementation of the present invention The example provides a schematic diagram of insulating paper surrounding a vertical winding coil on all sides; Fig. 9(4) is a schematic diagram of another insulating paper provided by an embodiment of the present invention.

Optionally, the stator core 100 further includes insulating paper 80; the insulating paper 80 is arranged in the slot 102 and wraps the vertical winding coil 301; as shown in Figures 9(1) to 9(4), the insulating paper 80 is in the slot The vertical winding coil 301 is wrapped in a three-sided manner in 102, or the insulating paper 80 is wrapped in a four-sided manner in the slot 102 to wrap the vertical winding coil 301.

Specifically, referring to Figures 9(1) to 9(4), Figures 9(1) and 9(2) are schematic diagrams of the vertical winding coil 301 on three sides of the insulating paper 80, Figure 9(3) and Figure 9(4) ) Is a schematic diagram of the vertical winding coil 301 surrounded by the insulating paper 80 on all sides. By using the insulating paper 80 to wrap the vertical winding coil 301, it reduces the occupation rate of the slot space when the skeleton is used to support the coil in the traditional case, and effectively improves the slot space Utilization rate.

The motor stator provided by the embodiment of the present invention includes the rectangular wire vertical-wound motor windings in the foregoing embodiment. Therefore, the motor stator provided by the embodiment of the present invention also has the beneficial effects described in the foregoing embodiment, and will not be repeated here.

The rectangular wire vertical wound motor provided by the embodiment of the present invention includes the motor stator in the above-mentioned embodiment. Therefore, the rectangular wire vertical wound motor provided by the embodiment of the present invention also has the beneficial effects described in the above embodiment, and will not be repeated here.

In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be interpreted broadly, for example, it may be a fixed connection or a detachable connection, or Integrally connected; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present invention can be understood in specific situations.

Finally, it should be noted that the above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made to those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope of is determined by the scope of the appended claims.

Claims

A rectangular wire vertical winding motor winding, characterized in that it comprises a three-phase vertical winding coil group (201); each phase of the vertical winding coil group (201) comprises M vertical winding coil units (300), M≥2, And M is an integer;

Wherein, each of the vertical winding coil units (300) includes: N vertical winding coils (301), N-1 long jumpers (302), 1 wire-in end and 1 wire-out end, N≥2, N=the number of slots of the stator core (100)/3/n, n is the number of parallel branches of the rectangular wire vertical winding motor winding (200), and n>2; two of the vertical winding coils (301) A said long span line (302) is formed therebetween;

The winding direction of the vertical winding coil (301) of the vertical winding coil unit (300) is consistent with or opposite to the direction in which the long span wire (302) is formed;

The number P of the teeth (101) of the stator core (100) spanned by the long span wire (302) is greater than two.
The rectangular wire vertical winding motor winding according to claim 1, wherein each vertical winding coil (301) comprises a plurality of first slot inner parts (3011) and a plurality of second slot inner parts (3012) And a plurality of turning portions (3013), a plurality of the first slot inner portion (3011) and a plurality of the second slot inner portion (3012) are arranged in two adjacent slots on the stator core (100) ；

The shape of the turning portion (3013) includes: a circular arc forming each straight line segment of the turning portion (3013) is tangent, wherein the turning radius of the turning portion (3013) R=(2*t+w +x)/2, R is the turning radius of the turning part (3013), t is the thickness of the insulating paper (80), w is the width of the tooth part (101), x is the part in the groove and the tooth Gap variable between parts (101);

Alternatively, the shape of the turning portion (3013) further includes: a rectangle with rounded corners tangent to each straight line forming the turning portion (3013);

Alternatively, the shape of the turning portion (3013) further includes: inferior arcs in which the straight line segments forming the turning portion (3013) are not tangent.
The flat-wire vertical wound motor winding according to claim 2, characterized in that,

Each vertical winding coil unit (300) is wound by a coil conductor with one tooth part (101) to form a first vertical winding coil (301), and another tooth part ( 101), the second vertical winding coil (301) is formed, until the P-th vertical winding coil (301) is formed;

Wherein, the preset distance is the length of the long span line (302), the preset distance=polar distance*2D, D is a constant, and D≥1, and D is an integer.
The rectangular wire vertical winding motor winding according to claim 3, wherein the number of parallel branches of the rectangular wire vertical winding motor winding (200) is 2, and the length of the vertical winding coil unit (300) The distance across the line (302) is the polar distance *2.
The rectangular wire vertical wound motor winding according to claim 4, characterized in that the number of slots of the stator core (100) is 30, and the number of parallel branches of the rectangular wire vertical wound motor winding (200) is n=2, The number of the vertical winding coil units (300) in the vertical winding coil group (201) per phase M=2;

The vertical winding coil unit (300) is wound by a coil conductor with one of the teeth (101) to form the first vertical winding coil (301) of the vertical winding coil unit (300), with a pole pitch *2 Winding the other tooth part (101) at a distance of, forming the second vertical winding coil (301) of the vertical winding coil unit (300), until forming the fifth vertical winding coil unit (300) Vertical winding coil (301).
The flat-wire vertical winding motor winding according to claim 1, wherein the inlet end of each vertical winding coil unit (300) is connected to a phase lead wire, and the outlet end is connected to a neutral point; or , The incoming wire end of each vertical winding coil unit (300) is connected to a neutral point, and the outgoing wire end is connected to a phase outgoing wire.
The rectangular wire vertical winding motor winding according to claim 1, wherein the inlet end of each vertical winding coil unit (300) in the vertical winding coil group (201) of each phase is uniform. Connected to form a one-phase wire-in end, and the wire-out ends of each of the vertical winding coil units (300) are all connected to form a wire-out end of one phase;

In the three-phase vertical winding coil group (201), the inlet end of the U phase is connected to the outlet end of the V phase, and the inlet end of the V phase is connected to the outlet end of the W phase The inlet end of the W phase is connected to the outlet end of the U phase, and the outlet end of any two phases is connected to the phase outlet at the position where the inlet end is connected.
A motor stator, characterized by comprising: a stator iron core (100) and the rectangular vertical-wound motor winding according to any one of claims 1-7;

The stator core (100) is cylindrical and includes Q teeth (101) and a plurality of T-slot wedges (60); the Q teeth (101) extend radially inward and along the circumference Evenly distributed, two adjacent teeth (101) form a slot (102), the number of slots (102) is Q, Q is a multiple of 3, and Q is an integer; the T-shaped slot wedge ( 60) Set between two adjacent vertical winding coils (301) in the same slot (102);

The rectangular wire vertical winding motor winding (200) is formed by winding the tooth part (101) with a coil conductor according to a preset rule, wherein the rectangular wire vertical winding motor winding (200) includes a three-phase vertical winding coil group ( 201), the vertical winding coil group (201) of each phase includes M vertical winding coil units (300), M≥2, and M is an integer; each vertical winding coil unit (300) includes N vertical winding Coil (301), N-1 long jumper wires (302), 1 incoming end and 1 outgoing end, N≥2, N=Q/3/n, n is the vertical winding motor winding ( 200) the number of parallel branches, and n>2.
The motor stator according to claim 8, wherein the stator core (100) further comprises insulating paper (80); the insulating paper (80) is arranged in the groove (102) and wraps the The vertical winding coil (301); the insulating paper (80) wraps the vertical winding coil (301) in the groove (102) in a three-sided manner, or the insulating paper (80) is The vertical winding coil (301) is wrapped in the groove (102) in the form of surrounding on four sides.
A rectangular wire vertical winding motor, characterized by comprising the motor stator according to any one of claims 8-9.