CN114362411B

CN114362411B - Outer rotor type motor winding tandem device with adjustable connection sequence

Info

Publication number: CN114362411B
Application number: CN202210050272.7A
Authority: CN
Inventors: 张新彤; 张成明; 李立毅; 曹继伟
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2023-01-13
Anticipated expiration: 2042-01-17
Also published as: CN114362411A

Abstract

The invention discloses an outer rotor type motor winding tandem device with adjustable splicing sequence, which relates to the technical field of motor windings, wherein a stator coil is wound on a tooth part of a stator core; the stator iron core is sleeved on the stator support; the PCB board packaging box is fixedly arranged on the stator support, and the winding junction PCB board is fixedly arranged in the PCB board packaging box; the winding junction PCB is provided with a bonding pad, leads at two ends of the stator coil are welded on the bonding pad, and a winding junction wire is welded on the bonding pad according to a winding arrangement mode; one end of the winding bus is welded on the bonding pad, and the other end of the winding bus is led out and connected with an external power supply circuit; the PCB packaging cover and the PCB packaging box form a packaging cavity so as to package a stator coil lead, a winding tandem PCB, a winding tandem wire and a winding bus. The device can avoid the problem of inserting the wire again or customizing the busbar again, and flexibly adjusts the connection sequence of the winding.

Description

Outer rotor type motor winding tandem device with adjustable connection sequence

Technical Field

The invention relates to the technical field of motor windings, in particular to an outer rotor type motor winding junction device with adjustable junction sequence.

Background

Compared with fractional slot lap windings and integer slot distribution windings, the fractional slot concentrated windings for the motor have the advantages of short winding end parts, low copper consumption, small winding resistance and the like, and the stator can adopt a sectional structure to improve the slot fullness rate; wherein the double-layer fractional-slot concentrated winding has a higher winding factor than the single-layer fractional-slot concentrated winding to improve the power density of the motor. The arrangement of the double-layer fractional slot concentrated winding is determined by the pole number and the slot number of the motor, under the same slot number, although different pole numbers can be matched according to the design requirement, the arrangement of the winding needs to be changed along with the change of the pole number, namely the tandem sequence among all coils needs to be adjusted.

However, in practical applications, the double-layer fractional-slot concentrated winding motor may need to modify the number of poles due to some reasons such as unreasonable electromagnetic design, and the winding arrangement needs to be changed, so that the junction sequence between the coils needs to be adjusted. The existing motor winding tandem connection modes are mainly divided into three types: the lead wire (2) and the bus bar (3) are connected with the circuit board. The lead wires are bound at the end parts of the windings, and once the lead wires are subjected to paint dipping or potting, the lead wires are difficult to separate out and carry out winding tandem connection again; the bus bar and the circuit board are supported and fixed by a framework, are not influenced by paint dipping or encapsulation, and can be separated from the coil, but are often customized according to the winding arrangement of the pre-designed pole slot number, and are difficult to flexibly adapt to other pole numbers.

Disclosure of Invention

The invention aims to provide an outer rotor type motor winding tandem device with adjustable tandem sequence, which can avoid the problem of re-inserting wires or re-customizing a bus bar and realize flexible adjustment of the tandem sequence of windings.

In order to achieve the above purpose, the invention provides the following technical scheme:

an outer rotor type motor winding tandem device with adjustable splicing sequence comprises a stator coil, a stator core, a stator support, a winding tandem PCB, a winding tandem wire, a PCB packaging box, a PCB packaging cover and a winding bus;

the stator coils are uniformly and circumferentially arranged, and each stator coil is wound and fixed on the corresponding tooth part of the stator core; the stator iron core is sleeved on the stator support; the stator support is an annular support structure and is used for fixedly supporting the stator core and the PCB packaging box;

the PCB board packaging box is fixedly arranged on the stator support, and the winding tandem PCB board is fixedly arranged in the PCB board packaging box;

the winding tandem PCB is provided with a bonding pad, leads at two ends of the stator coil are welded on the bonding pad, the winding tandem wire is welded on the bonding pad according to winding arrangement modes, and the welding position of the winding tandem wire on the bonding pad of the winding tandem PCB can be adjusted according to different winding arrangement modes;

one end of the winding bus is welded on the bonding pad, and the other end of the winding bus is led out and connected with an external power supply circuit;

the PCB board packaging cover and the PCB board packaging box are tightly and fixedly connected to form a packaging cavity, and the packaging cavity is used for packaging lead wires, winding junction PCBs, winding junction wires and winding buses at two ends of the stator coil located in the packaging cavity.

Optionally, 12 × n pads arranged in a circumferential manner are uniformly distributed on the winding junction PCB, where n represents the number of slots of the motor;

all the bonding pads are sequentially divided into a first layer bonding pad, a second layer bonding pad, a third layer bonding pad, a fourth layer bonding pad, a fifth layer bonding pad and a sixth layer bonding pad according to the diameter of the circumference from large to small, the number of the bonding pads on each layer is 2*n, and the bonding pads between different layers are corresponding in position and distributed along the same radial direction;

all the bonding pads in the sixth layer of bonding pads are connected in series, and the bonding pads in the first layer, the second layer, the third layer, the fourth layer and the fifth layer of bonding pads are connected in series and distributed in the same radial direction.

Optionally, the winding junction line includes an a-phase winding junction line, a B-phase winding junction line, and a C-phase winding junction line;

the A-phase winding junction wire is respectively welded on the second layer of bonding pad and the fifth layer of bonding pad; the phase B winding junction line is respectively welded on the third layer bonding pad and the fifth layer bonding pad; the C-phase winding junction line is respectively welded on the fourth layer bonding pad and the fifth layer bonding pad;

and the A-phase winding junction line, the B-phase winding junction line and the C-phase winding junction line form a three-phase junction line, and the fifth layer bonding pad is welded to the sixth layer bonding pad, so that the junction of the neutral points of the three-phase windings is realized.

Optionally, one end of the winding bus is welded on the fifth layer bonding pad, and the other end of the winding bus is led out from a wire hole in the center of the stator support and is connected with an external power supply circuit.

Optionally, a circle of convex side walls are respectively arranged at the inner edge and the outer edge of the bottom surface of the PCB board packaging box, and the convex side walls are used for increasing the height of the winding tandem PCB board.

Optionally, 2*n first through holes are formed in a protruding side wall of the outer edge of the PCB board packaging box, and the first through holes are used for enabling the lead wires of the stator coil to enter the packaging cavity from the first through holes, where n represents the number of motor slots;

and a plurality of second through holes are formed in the convex side wall of the inner edge of the PCB packaging box, and the second through holes are used for enabling the welding end of the winding bus to enter the packaging cavity from the second through holes.

Optionally, a plurality of limiting columns are arranged on the convex side wall of the outer edge of the PCB board packaging box, and the limiting columns are used for limiting and fixing the winding tandem PCB board.

Optionally, the edge of the winding tandem PCB board is provided with a plurality of limiting holes adapted to the limiting posts, and the limiting holes are used for enabling the limiting posts to be clamped into the limiting holes, so that the winding tandem PCB board is limited and fixed.

Optionally, a plurality of first mounting holes are formed in the PCB packaging box, and the first mounting holes are used in cooperation with bolts to fix the PCB packaging box on the stator support.

Optionally, the PCB encapsulation cover is provided with a plurality of second mounting holes adapted to the first mounting holes, and the second mounting holes are used in cooperation with the first mounting holes and the bolts to fix the PCB encapsulation box and the PCB encapsulation cover to the stator support.

Compared with the prior art, the outer rotor type motor winding tandem device with the adjustable splicing sequence, which is provided by the invention, has the advantages that the welding pads are arranged on the winding tandem PCB, the lead wires at the two ends of the stator coil are welded on the welding pads, the winding tandem wires are welded on the welding pads according to different winding arrangement modes, the welding positions of the winding tandem wires on the welding pads of the winding tandem PCB can be flexibly adjusted according to different winding arrangement requirements, the lead wires at the two ends of the stator coil are welded to the winding tandem PCB, and the winding tandem function is realized on the winding tandem PCB, so that the axial length of the end part of the winding is reduced, the space of the end part of the winding is saved, the end part of the winding is directly contacted with air, and the heat dissipation capability of the end part of the winding is enhanced. The winding arrangement mode of the winding junction line is adopted to be welded at different positions on the welding disc, so that the flexible adjustment of the winding junction under different pole numbers is realized, the trouble of inserting the wire again or customizing the bus bar or the circuit board again is avoided, the processing time is shortened, the cost is saved, and the working efficiency is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an outer rotor-type motor winding junction device with adjustable junction order according to embodiment 1 of the present invention;

fig. 2 is a disassembled schematic view of an outer rotor type motor winding junction device with adjustable junction sequence according to embodiment 1 of the present invention;

fig. 3 is a schematic diagram of a winding junction PCB provided in embodiment 1 of the present invention;

fig. 4 is a schematic diagram of a winding bus and a winding bus provided in embodiment 1 of the present invention;

fig. 5 is a schematic view of a PCB board package box and a package cover provided in embodiment 1 of the present invention;

fig. 6 is a schematic diagram of 20-pole 24-slot winding arrangement and winding junction provided in embodiment 1 of the present invention;

fig. 7 is a schematic diagram of the arrangement of 22-pole 24-slot windings and the winding junction provided in embodiment 2 of the present invention;

fig. 8 is a schematic diagram of 16-pole 24-slot winding arrangement and winding junction provided in embodiment 3 of the present invention.

The reference numbers illustrate:

1-stator coil, 2-stator core, 3-stator support, 4-winding tandem PCB, 5-winding tandem, 6-PCB packaging box, 7-PCB packaging cover, 8-winding bus, 9-pad, 901-first layer pad, 902-second layer pad, 903-third layer pad, 904-fourth layer pad, 905-fifth layer pad, 906-sixth layer pad, 10-limiting hole, 11-first mounting hole, 12-first through hole, 13-second through hole, 14-protruding side wall, 15-limiting column and 16-second mounting hole.

Detailed Description

In order to facilitate clear description of technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish identical items or similar items with substantially the same functions and actions. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It is intended that the words "exemplary" or "such as" and "like" be used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The invention aims to provide an outer rotor type motor winding tandem device with adjustable splicing sequence, which can avoid the problem of re-inserting wires or re-customizing a bus bar and flexibly adjust the splicing sequence of a winding.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example 1

As shown in fig. 1 and 2, the present embodiment proposes an outer rotor type motor winding junction device with adjustable junction, which includes a stator coil 1, a stator core 2, a stator support 3, a winding junction PCB 4, a winding junction 5, a PCB package box 6, a PCB package cover 7, and a winding bus 8.

The plurality of stator coils 1 are uniformly arranged circumferentially, and each stator coil 1 is wound and fixed on a corresponding tooth of the stator core 2. The stator core 2 is sleeved on the stator support 3; the stator support 3 is a circular ring-shaped support structure and is used for fixedly supporting the stator core 2 and the PCB packaging box 6.

In this embodiment, the stator support 3 is a "hub" -shaped ring support structure, a hollow support column protruding outwards is arranged at a central position of one end of the stator support 3, and the support column is sleeved with the PCB board packaging box 6, the PCB board packaging cover 7 and the like. And a limiting surface is arranged at the outer edge of the other end of the stator support 3 and used for limiting the stator core 2.

The PCB board packaging box 6 is fixedly arranged on the stator support 3, and the winding junction PCB board 4 is fixedly arranged in the PCB board packaging box 6.

The winding tandem PCB is characterized in that a pad 9 is arranged on the winding tandem PCB 4, lead wires at two ends of the stator coil 1 are welded on the pad 9, the winding tandem wire 5 is welded on the pad 9 according to a required winding arrangement mode, and the welding position of the winding tandem wire 5 on the pad 9 of the winding tandem PCB 4 can be flexibly adjusted according to different winding arrangement modes.

One end of the winding bus 8 is welded on the bonding pad 9, and the other end of the winding bus 8 is led out and connected with an external power supply circuit.

The PCB packaging cover 7 and the PCB packaging box 6 are tightly and fixedly connected to form a packaging cavity, and the packaging cavity is used for packaging the lead wires at the two ends of the stator coil 1 in the packaging cavity, the winding junction PCB 4, the winding junction wire 5 and the winding bus 8.

As shown in fig. 3, in this embodiment, 12 × n pads 9 arranged in a circle are uniformly distributed on the winding junction PCB 4, where n represents the number of slots of the motor.

In this embodiment, the pads 9 arranged circumferentially have 6 layers, and since the pads 9 are arranged circumferentially, all the pads 9 are sequentially divided into a first layer pad 901, a second layer pad 902, a third layer pad 903, a fourth layer pad 904, a fifth layer pad 905 and a sixth layer pad 906 from large to small according to the size of the diameter of the circumference, that is, all the pads 9 on the whole winding tandem PCB 4 are divided into six layers of pad 9 structures including the first layer pad 901, the second layer pad 902, the third layer pad 903, the fourth layer pad 904, the fifth layer pad 905 and the sixth layer pad 906 from outside to inside. And, the number of the bonding pads 9 on each layer of bonding pads 9 is 2*n, and the bonding pads 9 between different layers are corresponding in position and distributed along the same radial direction.

In this embodiment, all the pads 9 in the sixth layer of pads 906 are connected in series, and the pads 9 in the first layer of pads 901, the second layer of pads 902, the third layer of pads 903, the fourth layer of pads 904, and the fifth layer of pads 905, which are distributed in the same radial direction, are connected in series.

In order to indicate the welding position of the winding junction line 5 on the winding junction PCB 4, the invention defines the naming mode of the bonding pad 9 as (x, y), wherein x represents the layer number x =1,2,3, … and 6 where the bonding pad 9 is located, and represents a first layer bonding pad 901, a second layer bonding pad 902, a third layer bonding pad 903, a fourth layer bonding pad 904, a fifth layer bonding pad 905 and a sixth layer bonding pad 906 respectively; y denotes the position on the circumference where the pad 9 is located, y =1,2,3, …,2*n, and this embodiment counts clockwise.

Fig. 3 is a 24-slot winding junction PCB board, i.e. n =24, where pad (1,1) and pads (3, 12) are labeled, pad (1,1) represents pad 9 at the 1 st position on first layer pad 901, and pad (3, 12) represents pad 9 at the 12 th position on third layer pad 903, to illustrate the naming manner of pad 9.

According to the invention, by arranging the plurality of layers of the pads 9 which are arranged circumferentially, the welding positions of the winding junction lines 5 on the pads 9 of the winding junction PCB 4 can be flexibly adjusted according to the requirements of different winding arrangement. Meanwhile, the naming mode of the bonding pad 9 is provided for the bonding position of the bonding pad 9, and the specific bonding position of the winding junction wire 5 on the winding junction PCB 4 can be accurately determined and described. And, through welding stator coil 1 both ends lead wire to winding tandem PCB board 4 to realize the winding tandem function on winding tandem PCB board 4, thereby reduced winding tip axial length, saved winding tip space, make winding tip direct and air contact, strengthened the heat-sinking capability of winding tip. The winding arrangement mode of the winding junction wire 5 is welded at different positions on the welding disc 9, so that the flexible adjustment of winding junction under different pole numbers is realized, the trouble of re-inserting wires or re-customizing a bus bar or a circuit board is avoided, the processing time is shortened, the cost is saved, and the working efficiency is improved.

In this embodiment, winding wiring 5 adopts single core hard copper wire, and the fire-retardant sheath of outer parcel, easy moulding is convenient for the different line lengths of intercepting, can arrange according to different windings, adjusts the welding position on winding tandem PCB board 4 to can avoid inserting the line again or customize the problem of busbar again, the connection preface of nimble adjustment winding.

As shown in fig. 4, the winding bus lines 5 include an a-phase winding bus line, a B-phase winding bus line, and a C-phase winding bus line. The A-phase winding junction wire is respectively welded on the second layer bonding pad 902 and the fifth layer bonding pad 905; the phase-B winding junction line is respectively welded on the third layer bonding pad 903 and the fifth layer bonding pad 905; the C-phase winding junction line is respectively welded on the fourth layer bonding pad 904 and the fifth layer bonding pad 905. The phase-A winding junction line, the phase-B winding junction line and the phase-C winding junction line form a three-phase junction line, and the three-phase junction line is welded to the sixth layer of bonding pads 906 through the fifth layer of bonding pads 905, so that junction of neutral points of the three-phase winding is realized.

In this embodiment, the winding bus 8 is a multi-strand copper core flexible wire, and a flame-retardant sheath is wrapped outside the multi-strand copper core flexible wire. One end of the winding bus 8 is welded on the fifth bonding pad 905, and the other end of the winding bus 8 is led out from a wire hole in the center of the stator support 3 and can be connected with an external power supply circuit, so that power supply for the motor winding junction device is realized.

As shown in fig. 5, a circle of protruding sidewalls 14 are respectively disposed on the inner and outer edges of the bottom surface of the PCB board enclosure 6, and the protruding sidewalls 14 are used to increase the height of the winding junction PCB board 4, that is, to heighten the winding junction PCB board 4, so as to prevent the back surface of the winding junction PCB board 4 from being placed in the PCB board enclosure 6 due to solder bumps.

2*n first through holes 12 are arranged on the convex side wall 14 at the outer edge of the PCB packaging box 6, the number of the first through holes 12 is equal to that of each layer of bonding pads 9, the first through holes 12 are used for enabling the leads of the stator coil 1 to enter the packaging cavity from the first through holes 12, wherein n represents the number of motor slots.

A plurality of second through holes 13 are formed in a convex side wall 14 on the inner edge of the PCB packaging box 6, and the second through holes 13 are used for enabling the welding ends of the winding bus 8 to enter the packaging cavity from the second through holes 13. In this embodiment, there are 3 second through holes 13 uniformly distributed on the convex sidewall 14 of the inner edge of the PCB board packaging box 6.

As shown in fig. 5, a plurality of limiting posts 15 are disposed on the convex sidewall 14 of the outer edge of the PCB packaging box 6, and the limiting posts 15 are used for limiting and fixing the winding tandem PCB 4, so as to prevent the winding tandem PCB 4 from moving in the packaging cavity.

As shown in fig. 3, a plurality of limiting holes 10 adapted to the limiting posts 15 are formed in the edge of the winding tandem PCB 4, and the limiting holes 10 are used for enabling the limiting posts 15 to be clamped into the limiting holes 10, so that the winding tandem PCB 4 is limited and fixed. In this embodiment, the number of the limiting columns 15 and the number of the limiting holes 10 are 4, and the limiting columns and the limiting holes are semicircular.

The PCB packaging box 6 is provided with a plurality of first mounting holes 11, and the PCB packaging cover 7 is provided with a plurality of second mounting holes 16 adapted to the first mounting holes 11, as shown in fig. 5, in this embodiment, there are 4 first mounting

holes

11 and 4 second mounting holes 16. The second mounting hole 16 is used in cooperation with the first mounting hole 11 and the bolt to fix the PCB board package box 6 and the PCB board package cover 7 to the stator support 3. The first mounting hole 11 is used for being matched with a bolt for use, and the PCB packaging box 6 is fixed on the stator support 3.

As shown in fig. 6, this embodiment exemplifies an outer rotor type motor winding junction device with adjustable connection sequence, wherein the number of motor slots is 24, the number of poles is 20, and the winding junctions are as follows: the both-end lead-out wires of all the stator coils 1 are soldered to the first-layer lands 901 of the winding-junction PCB 4, wherein:

the phase a winding junction line has 8, and the welding positions of the two ends of each phase a winding junction line are [ (2,1) (2,3) ], [ (2, 12) (2, 14) ], [ (2, 15) (2, 24) ], [ (2, 26) (2, 37) ], [ (2, 39) (2, 48) ], [ (5, 25) (5, 27) ], [ (5, 36) (5, 38) ], [ (5, 13) (6, 13) ], in this order, according to the naming mode of the bonding pad 9 in embodiment 1.

The number of the phase B winding junction lines is 8, and the welding positions of two ends of each phase B winding junction line are [ (3,7) (3, 16) ], [ (3, 17) (3, 19) ], [ (3, 28) (3, 30) ], [ (3, 31) (3, 40) ], [ (3, 42) (3,5) ], [ (5,4) (5,6) ], [ (5, 41) (5, 43) ], [ (5, 29) (6, 29) ].

The number of the C-phase winding junction lines is 8, and the welding positions of two ends of each C-phase winding junction line are [ (4, 10) (4, 21) ], [ (4, 23) (4, 32) ], [ (4, 33) (4, 35) ], [ (4, 44) (4, 46) ], [ (4, 47) (4,8) ], [ (5,9) (5, 11) ], [ (5, 20) (5, 22) ], [ (5, 45) (6, 45) ].

The welding position of one end of the winding bus of the phase A winding junction line is (5,2), the welding position of one end of the winding bus of the phase B winding junction line is (5, 18), and the welding position of one end of the winding bus of the phase C winding junction line is (5, 34).

Example 2

As shown in fig. 7, this embodiment exemplifies another external rotor type motor winding junction device with adjustable junction, the structure of the device is the same as that of embodiment 1, but the number of motor slots in this embodiment is 24, the number of poles is 22, and the winding junctions are as follows: the both-end lead-out wires of all the stator coils 1 are soldered to the first-layer lands 901 of the winding-junction PCB 4, wherein:

the phase a winding bus lines have 8, and the bonding positions of both ends of each phase a winding bus line are [ (2,1) (2,3) ], [ (2, 20) (2, 22) ], [ (2, 23) (2, 25) ], [ (2, 27) (2, 44) ], [ (2, 46) (2, 48) ], [ (5, 24) (5, 26) ], [ (5, 45) (5, 47) ], [ (5, 21) (6, 21) ], in this order, according to the naming of the bonding pad 9 in embodiment 1.

The number of the phase B winding junction lines is 8, and the welding positions of two ends of each phase B winding junction line are [ (3,4) (3,6) ], [ (3,7) (3,9) ], [ (3, 11) (3, 28) ], [ (3, 30) (3, 32) ], [ (3, 33) (3, 35) ], [ (5,8) (5, 10) ], [ (5, 29) (5, 31) ], [ (5,5) (6,5) ].

The number of the phase C winding junction lines is 8, and the welding positions of two ends of each phase C winding junction line are [ (4, 14) (4, 16) ], [ (4, 17) (4, 19) ], [ (4, 36) (4, 38) ], [ (4, 39) (4, 41) ], [ (4, 43) (4, 12) ], [ (5, 13) (5, 15) ], [ (5, 40) (5, 42) ], [ (5, 37) (6, 37) ].

The welding position of one end of the winding bus of the phase A winding junction line is (5,2), the welding position of one end of the winding bus of the phase B winding junction line is (5, 34), and the welding position of one end of the winding bus of the phase C winding junction line is (5, 18).

Example 3

As shown in fig. 8, this embodiment exemplifies another external rotor type motor winding junction device with adjustable junction, the structure of the device is the same as that of embodiment 1, but the number of motor slots in this embodiment is 24, the number of poles is 16, and the winding junctions are as follows: the two-end lead-out wires of all the stator coils 1 are soldered to the first-layer soldering land 901 of the winding tandem PCB 4, wherein:

the phase a winding junction line has 8, and the welding positions of the two ends of each phase a winding junction line are [ (2,3) (2,8) ], [ (2,9) (2, 14) ], [ (2, 15) (2, 20) ], [ (2, 21) (2, 26) ], [ (2, 27) (2, 32) ], [ (2, 33) (2, 38) ], [ (2, 39) (2, 44) ], [ (5, 45) (6, 45) ], in sequence, according to the naming mode of the bonding pad 9 in the embodiment 1.

The number of the phase B winding junction lines is 8, and the welding positions of two ends of each phase B winding junction line are [ (3,5) (3, 10) ], [ (3, 11) (3, 16) ], [ (3, 17) (3, 22) ], [ (3, 23) (3, 28) ], [ (3, 35) (3, 40) ], [ (3, 41) (3, 46) ], [ (3, 47) (3,4) ], and [ (5, 29) (6, 29) ].

The number of the C-phase winding junction lines is 8, and the welding positions of two ends of each C-phase winding junction line are [ (4,1) (4,6) ], [ (4,7) (4, 12) ], [ (4, 19) (4, 24) ], [ (4, 25) (4, 30) ], [ (4, 31) (4, 36) ], [ (4, 37) (4, 42) ], [ (4, 43) (4, 48) ], [ (5, 13) (6, 13) ].

It should be noted that in addition to the above examples, the 24 slots can be matched with 26 poles, 28 poles or 32 poles. The 24-slot 26-pole and 24-slot 22-pole winding junction method is the same, and only the winding buses of the B phase and the C phase need to be interchanged; the 24-slot 28-pole and 24-slot 20-pole winding junction method is the same, and only the winding buses of the B phase and the C phase need to be interchanged; the 24-slot 32-pole and 24-slot 16-pole winding junction method is the same, and only the winding buses of the B phase and the C phase need to be interchanged.

It should be noted that the present invention does not limit the specific number of slots and poles of the motor, and these values are not fixed and unique, and can be determined by themselves according to the actual situation.

Although the present invention has been described in connection with the specific features and embodiments thereof, it is apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The outer rotor type motor winding junction device with adjustable junction sequence is characterized by comprising a stator coil (1), a stator core (2), a stator support (3), a winding junction PCB (4), a winding junction wire (5), a PCB packaging box (6), a PCB packaging cover (7) and a winding bus (8);

the stator coils (1) are uniformly and circumferentially arranged, and each stator coil (1) is wound and fixed on a corresponding tooth part of the stator core (2); the stator iron core (2) is sleeved on the stator support (3); the stator support (3) is an annular support structure and is used for fixedly supporting the stator core (2) and the PCB packaging box (6);

the PCB packaging box (6) is fixedly arranged on the stator support (3), and the winding junction PCB (4) is fixedly arranged in the PCB packaging box (6);

a welding pad (9) is arranged on the winding tandem PCB (4), leads at two ends of the stator coil (1) are welded on the welding pad (9), the winding tandem wire (5) is welded on the welding pad (9) according to a winding arrangement mode, and the welding position of the winding tandem wire (5) on the welding pad (9) of the winding tandem PCB (4) can be adjusted according to different winding arrangement requirements;

one end of the winding bus (8) is welded on the bonding pad (9), and the other end of the winding bus (8) is led out and connected with an external power supply circuit;

the PCB packaging cover (7) is tightly and fixedly connected with the PCB packaging box (6) to form a packaging cavity, and the packaging cavity is used for packaging a lead, a winding tandem PCB (4), a winding tandem wire (5) and a winding bus (8) which are positioned at two ends of the stator coil (1) in the packaging cavity.

2. The outer rotor-type motor winding junction device with adjustable connection sequence of claim 1, wherein 12 x n pads (9) are uniformly distributed on the winding junction PCB (4) and are arranged in a circle, wherein n represents the number of motor slots;

all the bonding pads (9) are sequentially divided into a first layer bonding pad (901), a second layer bonding pad (902), a third layer bonding pad (903), a fourth layer bonding pad (904), a fifth layer bonding pad (905) and a sixth layer bonding pad (906) according to the diameter of the circumference from large to small, the number of the bonding pads (9) on each layer of bonding pad is 2*n, and the bonding pads (9) between different layers correspond in position and are distributed along the same radial direction;

all the bonding pads (9) in the sixth layer of bonding pads are connected in series, and the bonding pads (9) in the first layer of bonding pads (901), the second layer of bonding pads (902), the third layer of bonding pads (903), the fourth layer of bonding pads (904) and the fifth layer of bonding pads (905) distributed in the same radial direction are connected in series.

3. The outer rotor-type motor winding junction device with the adjustable sequence as claimed in claim 2, wherein the winding junction line (5) comprises an a-phase winding junction line, a B-phase winding junction line and a C-phase winding junction line;

the A-phase winding junction wire is respectively welded on the second layer of bonding pad (902) and the fifth layer of bonding pad (905); the phase B winding junction line is respectively welded on the third layer bonding pad (903) and the fifth layer bonding pad (905); the C-phase winding junction line is respectively welded on the fourth layer bonding pad (904) and the fifth layer bonding pad (905);

the A-phase winding junction line, the B-phase winding junction line and the C-phase winding junction line form a three-phase junction line, and the fifth layer bonding pad (905) is welded to the sixth layer bonding pad (906), so that junction of neutral points of three-phase windings is achieved.

4. The outer rotor type motor winding junction device with adjustable sequence according to claim 2, wherein one end of the winding bus (8) is welded on the fifth bonding pad (905), and the other end of the winding bus (8) is led out from a wire hole at the center of the stator support (3) and connected with an external power supply wire.

5. The outer rotor-type motor winding junction device with adjustable connection sequence as claimed in claim 1, wherein the inner and outer edges of the bottom surface of the PCB board enclosure box (6) are respectively provided with a circle of raised sidewalls (14), and the raised sidewalls (14) are used for increasing the height of the winding junction PCB board (4).

6. The outer rotor type motor winding junction device with adjustable connection sequence of claim 5, characterized in that 2*n first perforations (12) are arranged on the convex side wall (14) of the outer edge of the PCB board packaging box (6), the first perforations (12) are used for leading wires of the stator coil (1) to enter the packaging cavity from the first perforations (12), wherein n represents the number of motor slots;

a plurality of second through holes (13) are formed in a convex side wall (14) on the inner edge of the PCB packaging box (6), and the second through holes (13) are used for enabling the welding ends of the winding buses (8) to enter the packaging cavity from the second through holes (13).

7. The outer rotor type motor winding tandem device with adjustable connection sequence of claim 5, wherein a plurality of limiting columns (15) are arranged on the raised side wall (14) of the outer edge of the PCB packaging box (6), and the limiting columns (15) are used for limiting and fixing the winding tandem PCB (4).

8. The outer rotor type motor winding tandem device with the adjustable connection sequence of claim 7, wherein a plurality of limiting holes (10) matched with the limiting columns (15) are formed at the edge of the winding tandem PCB (4), and the limiting holes (10) are used for enabling the limiting columns (15) to be clamped into the limiting holes (10) to limit and fix the winding tandem PCB (4).

9. The outer rotor-type motor winding junction device with adjustable connection sequence as claimed in claim 1, wherein a plurality of first mounting holes (11) are formed on the PCB panel enclosure box (6), the first mounting holes (11) are used for cooperating with bolts to fix the PCB panel enclosure box (6) to the stator support (3).

10. The outer rotor-type motor winding junction device with adjustable connection sequence of claim 9, wherein a plurality of second mounting holes (16) matched with the first mounting holes (11) are formed on the PCB encapsulation cover (7), and the second mounting holes (16) are used for being matched with the first mounting holes (11) and the bolts to fix the PCB encapsulation box (6) and the PCB encapsulation cover (7) on the stator support (3).