WO2017113512A1

WO2017113512A1 - Stator punching sheet, stator assembly and external rotor motor

Info

Publication number: WO2017113512A1
Application number: PCT/CN2016/075899
Authority: WO
Inventors: 付桂文; 王雄程; 朱金成; 邓双朝; 叶玉明; 焦青梅
Original assignee: 中山大洋电机股份有限公司
Priority date: 2015-12-31
Filing date: 2016-03-08
Publication date: 2017-07-06
Also published as: CN106936233B; CN106936233A

Abstract

Provided are a stator punching sheet, a stator assembly and an external rotor motor. The stator punching sheet comprises a punching sheet body (1) with a central hole, wherein the punching sheet body (1) comprises an annular yoke (10) and a plurality of teeth which stretch out from the outer edge of the annular yoke (10); the punching sheet body (1) is provided with a plurality of first groove groups (2) and a plurality of second groove groups (3); the first groove groups (2) and the second groove groups (3) are alternately arrayed on the outer edge of the punching sheet body (1) in the circumferential direction; the depth of the first groove groups (2) in the radial direction of the punching sheet body (1) is greater than that of the second groove groups (3) in the radial direction of the punching sheet body (1); each of the first groove groups (2) comprises a first shared wire embedding groove (21) located in the middle, and a first left wire embedding groove (22) and a first right wire embedding groove (23) which are respectively located on two sides of the first shared wire embedding groove (21); and each of the second groove groups (3) comprises a second shared wire embedding groove (31) located in the middle, and a second left wire embedding groove (32) and a second right wire embedding groove (33) which are respectively located on two sides of the second shared wire embedding groove (31). The stator punching sheet can improve the performance of a motor.

Description

Stator punch, stator assembly and outer rotor motor

Technical field:

The invention relates to a stator punching piece, a stator assembly and an outer rotor motor, and belongs to the technical field of motors.

Background technique:

Current motors, such as plastic outer rotor motors, include a molded stator and a motor rotor. The molded stator includes a stator core laminated by a plurality of stator punches and a main coil winding and a secondary coil winding wound around the stator core.

In the stator blank of the prior art, the conventional structure of the model is that each of the ruled grooves has the same size and shape and is uniformly distributed on the outer side of the circumference. Although the structure is simple and easy to mold, the winding wire is inconvenient and the winding ends are high and high, resulting in high consumption of motor materials and high cost. Moreover, since the welt grooves are located on the outer side, the teeth are narrower, resulting in higher magnetic density of the stator teeth, thereby affecting the performance and efficiency of the motor.

Summary of the invention:

It is an object of the present invention to provide a stator blank, a stator assembly and an outer rotor motor that can improve motor performance.

The object of the present invention is achieved by the following technical solutions.

a stator punching piece comprising a punching body having a central hole, the punching body comprising an annular yoke and a plurality of teeth extending outwardly from an outer edge of the annular yoke, the punching body being provided with a plurality of a slot group and a plurality of second slot groups, wherein the first slot group and the second slot group are alternately arranged circumferentially on the outer edge of the punching piece, and the first slot group is along the punching piece a depth in a radial direction of the body is deeper than a depth of the second groove group in a radial direction of the punch body, the first groove set including a first common welt groove in the middle and respectively located in the first common rule line a first left welt groove and a first right welt groove on both sides of the slot, the second slot set includes a second common welt slot in the middle and a second left embedding on each side of the second common welt slot Trunking and second right welt.

The plurality of teeth include a plurality of first tooth portions, a second tooth portion and a third tooth portion, the first tooth portion, the second tooth portion and the third tooth portion being juxtaposed together to form one tooth unit, and the plurality of tooth units are circumferentially Distribution, where Forming the first left ruled groove between the first tooth portion and the second tooth portion, forming the first common wire groove between the second tooth portion and the third tooth portion, and the third tooth portion and the third tooth portion The first right welt groove is formed between a tooth portion.

The first tooth portion includes a common root portion and left, right, right, and right teeth extending outward from the common root, wherein the first portion is formed between the left and left straight teeth a second left ruled groove, the second common welt groove is formed between the left straight tooth and the right straight tooth, and the second right ruled groove is formed between the right straight tooth and the right curved tooth.

The left straight tooth and the right straight tooth are symmetrically distributed along the radial center line of the common root portion, and the left and right curved teeth are also symmetrically distributed along the radial center line of the common root portion, and the second left weld groove is close to the slot. In the left straight tooth, the notch of the second common welt groove is located at an intermediate position between the left straight tooth and the right straight tooth, and the notch of the second right wire groove is close to the right straight tooth.

The width of the common root portion is greater than the width of the left straight or right straight teeth, and the width of the common root portion gradually increases outward in the radial direction of the punch body.

The bottom of the groove of the second left ruled groove and the second right ruled groove is an arc formed by the center of the punch body.

The second tooth portion and the third tooth portion are all spur-shaped, and the second tooth portion and the third tooth portion are symmetrically distributed along a radial center line of the first common welt groove, the first common wire groove The notch is located at an intermediate position between the second tooth portion and the third tooth portion.

The first left inlaid groove and the bottom of the first right inlaid groove are arcs formed by a center of the center of the punching body.

The number of the first slot group and the second slot group is four, wherein the first slot group is used for winding the secondary winding, and the second slot group is for winding the main winding.

a stator assembly including a stator core, an end insulation, a first working winding, and a second working winding, the end insulation being mounted on an end face of the stator core, the stator core being as described above The stator windings are stacked, the first working winding is wound around the first slot group, the second working winding is wound around the second slot group, and the first working winding comprises a plurality of groups distributed along the circumferential interval. a working coil, a plurality of sets of first working coils are sequentially connected together, and the second working winding includes a plurality of sets of circumferentially spaced a second working coil of the cloth, the plurality of sets of second working coils are sequentially connected together, and the first working coil and the second working coil are arranged in parallel with each other inside and outside, wherein each of the first working coils comprises a plurality of first working inner layer coils and a plurality of匝 a first working outer coil, the first working inner layer coil is disposed in parallel with the inner and outer coils of the first working outer layer coil, and the two ends of the first working inner layer coil are respectively disposed adjacent to the adjacent two first groove groups a right wire groove and a first left wire groove, the first working outer coil is respectively wound around the first common wire groove in the adjacent two first groove groups, and each second working coil The utility model comprises a plurality of second working inner layer coils and a plurality of second working outer layer coils, wherein the second working inner layer coil is arranged in parallel with the inner and outer working coils, and the two working inner layer coils are respectively arranged adjacent to each other. Two second right inlaid troughs and a second left inlaid trough in the two second trough groups, and two ends of the second working outer coil are respectively disposed in the second of the adjacent two second trough groups Common welt slot.

The outer rotor motor comprises a rotating shaft, a plastic sealing stator and an outer rotor. The outer rotor is sleeved outside the plastic sealing stator. The rotating shaft is installed in the middle of the plastic sealing stator and is connected with the outer rotor. The plastic sealing stator comprises a stator core, an end insulation and a coil. The winding and the plastic body are respectively insulated on the end surface of the stator core, and the coil winding is wound around the end insulation, and the plastic sealing body integrally connects the stator core, the end insulation and the coil winding, and the stator core is It is laminated by a plurality of stator punches as described above.

Compared with the prior art, the invention has the following effects:

1) the depth of the first groove group in the radial direction of the punch body is deeper than the depth of the second groove group in the radial direction of the punch body, thereby reducing and avoiding the main and auxiliary coil windings Overlap, facilitating winding and arranging, making the ends of the primary and secondary coil windings shorter and lower, reducing the amount of copper used in the primary and secondary coil windings, which is advantageous for reducing costs, the first slot group and the The second slot group is disposed in plurality, and the first slot group and the second slot group are alternately arranged circumferentially on the outer edge of the punch body, and the first slot group includes the middle slot a first common welt slot and a first left welt slot and a first right welt slot respectively located on opposite sides of the first common welt slot, the second slot set including a second common welt slot in the middle and respectively The second left inlaid trough and the second right inlaid trough on both sides of the second common welt groove improve the punch structure by adding the first common inlay trough and the second common inlaid trough, facilitating winding and arranging Line, and can distribute the magnetic field evenly, so that the efficiency and performance of the motor can be improved, and the noise of the motor becomes smaller. Can accommodate More primary and secondary coil windings are added, which improves the slot full rate during winding.

BRIEF DESCRIPTION OF THE DRAWINGS:

Figure 1 is a schematic view showing the structure of a stator punching piece in the embodiment;

2 is a schematic structural view of a stator assembly in an embodiment;

3 is a partial structural schematic view of a stator assembly in an embodiment;

Figure 4 is a perspective view of the outer rotor motor in the embodiment;

Fig. 5 is a schematic structural view of an outer rotor motor in the embodiment.

detailed description:

The present invention will now be described in further detail by way of specific embodiments and the accompanying drawings.

Embodiment 1 : As shown in FIG. 1 , this embodiment is a stator punching piece comprising a punching body 1 with a central hole, the punching body 1 including an annular yoke 10 and an outer edge of the annular yoke 10 a plurality of teeth extending upwardly, the punch body 1 being provided with a first groove group 2 and a second groove group 3, the first groove group 2 being deep in the radial direction of the punch body 1 a plurality of the first slot group 2 and the second slot group 3 are disposed at a depth of the second slot group 3 along a radial direction of the punch body 1, and the first slot group 2 And the second slot group 3 are alternately arranged circumferentially on the outer edge of the punching body 1 , the first slot group 2 includes a first common welt slot 21 in the middle and respectively located in the first common inlay a first left ruled groove 22 and a first right wire groove 23 on both sides of the wire groove 21, the second groove group 3 includes a second common wire groove 31 located in the middle and respectively located in the second common wire groove 31 The second left inlaid groove 32 and the second right inlaid groove 33 on both sides. The plurality of teeth include a plurality of first tooth portions 11, a second tooth portion 12 and a third tooth portion 13, and the first tooth portion 11, the second tooth portion 12 and the third tooth portion 13 are juxtaposed together to form a tooth unit. The plurality of tooth units are distributed in the circumferential direction, wherein the first left ruled groove 22 is formed between the first tooth portion 11 and the second tooth portion 12, and is formed between the second tooth portion 12 and the third tooth portion 13. The first common welt groove 21 forms the first right welt groove 23 between the third tooth portion 13 and the first tooth portion 11. The first tooth portion 11 includes a common root portion 111 and left curved teeth 112, left straight teeth 113, right straight teeth 114 and right curved teeth 115 extending outward from the common root portion 111, wherein the left curved teeth 112 and The second left ruled groove 32 is formed between the left straight teeth 113, and the second common wire groove 31 is formed between the left straight teeth 113 and the right straight teeth 114, on the right The second right ruled groove 33 is formed between the straight tooth 114 and the right curved tooth 115. The left straight tooth 113 and the right straight tooth 114 are symmetrically distributed along the radial center line A1 of the common root portion 111, and the left curved tooth 112 and the right curved tooth 115 are also symmetrically distributed along the radial center line A1 of the common root portion 111, the second left The slot of the wire groove 32 is close to the left straight tooth 113, the notch of the second common wire groove 31 is located at an intermediate position between the left straight tooth 113 and the right straight tooth 114, and the groove of the second right rule groove 33 The mouth is close to the right straight tooth 114. The width of the common root portion 111 is larger than the width of the left straight tooth 113 or the right straight tooth 114, and the width of the common root portion 111 gradually becomes larger outward in the radial direction of the punch body 1. Both the second left inlaid groove 32 and the groove bottom 34 of the second right inlaid groove 33 are arcs formed by the center O of the punch body 1 as a center. The second tooth portion 12 and the third tooth portion 13 are each in a straight tooth shape, and the second tooth portion 12 and the third tooth portion 13 are symmetrically distributed along a radial center line A2 of the first common welt groove 21, The notch of a common welt groove 21 is located at an intermediate position between the second tooth portion 12 and the third tooth portion 13. The first left welt groove 22 and the groove bottom 24 of the first right welt groove 23 are each a circular arc formed by the center O of the punch body 1 as a center. The number of the first slot group 2 and the second slot group 3 is four, wherein the first slot group 2 is for winding the secondary winding, and the second slot group 3 is for winding the main winding.

Embodiment 2: As shown in FIG. 1 , FIG. 2 and FIG. 3 , the embodiment is a stator assembly including a stator core, an end insulation, a first working winding 4 and a second working winding 5, The end insulation is mounted on the end face of the stator core, and the stator core is formed by stacking a plurality of stator punches 1 as described in the first embodiment, and the first working winding 4 is wound around the first slot group 2, The second working winding 5 is wound around the second slot group 3, and the first working winding 4 includes a plurality of sets of first working coils 41 distributed in the circumferential direction, and the plurality of sets of first working coils 41 are sequentially connected together. The second working winding 5 includes a plurality of sets of second working coils 51 distributed in the circumferential direction, and the plurality of sets of second working coils 51 are sequentially connected together, and the first working coil 41 and the second working coil 51 are alternately arranged in parallel with each other, wherein each The first working coil 41 includes a plurality of first working inner layer coils 411 and a plurality of first working outer layer coils 412, and the first working inner layer coils 411 are disposed in parallel with the inner and outer portions of the first working outer layer coils 412, within the first working The two ends of the layer coil 411 are respectively disposed adjacent to the two adjacent ones The adjacent first right inlaid groove 23 and the first left inlaid groove 22 in the group 2 are wound around the common root portion 111 of the first tooth portion 11, and the first working outer layer coil 412 is respectively respectively Winding The first common welt groove 21 of the adjacent two first slot groups 2, and spans one first left ruled groove 22 and one first right ruled groove 23, and spans one a tooth portion 11, each of the second working coils 51 includes a plurality of second working inner layer coils 511 and a plurality of second working outer layer coils 512, and the second working inner layer coils 511 and the second working outer layer coils 512 are parallel to the inside and outside The two ends of the second working inner layer coil 511 are respectively disposed adjacent to the adjacent second right inlaid groove 33 and the second left inlaid groove 32 of the adjacent two second groove groups 3, and span one first The common wire groove 21 is spanned by one second tooth portion 12 and one third tooth portion 13 , and two ends of the second working outer layer coil 511 are respectively disposed in the adjacent two second groove groups 3 . a second common welt groove 31, and spanning one first slot group 2, and spanning one right curved tooth 115, one second tooth portion 12, one third tooth portion 13, and one left curved piece Teeth 112.

Embodiment 3: As shown in FIG. 1 to FIG. 5, the present embodiment is an outer rotor motor including a rotating shaft 6, a molded stator 7 and an outer rotor 8. The outer rotor 8 is sleeved on the outside of the plastic stator 7, and the rotating shaft 6 is mounted on The stator 7 is molded in the middle and is coupled to the outer rotor 8. The molded stator 7 includes a stator core 71, an end insulation 72, a coil winding 73, and a molding body 74. The end insulation 72 is mounted on the end surface of the stator core 71. The coil winding 73 is wound around the end insulation 72. The molding body 74 integrally connects the stator core 71, the end insulation 72 and the coil winding 73. The stator core 71 is formed by several embodiments as described in the first embodiment. The stator punching piece 1 is laminated, and the structure of the stator punching piece will not be described here.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and scope of the present invention are equivalent. The manner of replacement is included in the scope of protection of the present invention.

Claims

A stator blank comprising a punch body (1) having a central bore, the punch body (1) comprising an annular yoke (10) and a plurality of teeth extending outwardly from an outer edge of the annular yoke (10) Is characterized in that: the punch body (1) is provided with a plurality of first groove groups (2) and a plurality of second groove groups (3), the first groove group (2) and the second The groove groups (3) are alternately arranged circumferentially on the punch body (1), and the depth of the first groove group (2) in the radial direction of the punch body (1) is deeper than the second The depth of the groove group (3) along the radial direction of the punch body (1), the first groove group (2) includes a first common wire groove (21) located in the middle and respectively located at the first common rule line a first left welt groove (22) and a first right welt groove (23) on both sides of the slot (21), the second slot set (3) including a second common welt slot (31) in the middle and A second left ruled groove (32) and a second right ruled groove (33) are respectively located on both sides of the second common weaving groove (31).
The stator blank according to claim 1, wherein the plurality of teeth comprise a plurality of first teeth (11), a second tooth portion (12) and a third tooth portion (13), the first tooth portion ( 11), the second tooth portion (12) and the third tooth portion (13) are juxtaposed together to form a tooth unit, and the plurality of tooth units are distributed in the circumferential direction, wherein the first tooth portion (11) and the second tooth portion ( 12) forming the first left welt groove (22), forming the first common welt groove (21) between the second tooth portion (12) and the third tooth portion (13), at the The first right welt groove (23) is formed between the trident portion (13) and the first tooth portion (11).
The stator blank according to claim 2, wherein said first tooth portion (11) comprises a common root portion (111) and a left curved tooth (112) extending outward from the common root portion (111). a left straight tooth (113), a right straight tooth (114), and a right curved tooth (115), wherein the second left ruled groove (32) is formed between the left curved tooth (112) and the left straight tooth (113) Forming the second common welt groove (31) between the left straight tooth (113) and the right straight tooth (114), forming the said between the right straight tooth (114) and the right curved tooth (115) Second right ruled groove (33).
The stator blank according to claim 3, wherein the left straight teeth (113) and the right straight teeth (114) are symmetrically distributed along a radial center line of the common root portion (111), and the left curved teeth (112) are The right curved teeth (115) are also symmetrically distributed along the radial centerline of the common root portion (111), and the second left welt groove (32) The notch is close to the left straight tooth (113), and the notch of the second common wire groove (31) is located at an intermediate position between the left straight tooth (113) and the right straight tooth (114), and the second right ruled line The slot of the slot (33) is adjacent to the right straight tooth (114).
The stator blank according to claim 3 or 4, wherein the width of the common root portion (111) is larger than the width of the left straight tooth (113) or the right straight tooth (114), and the common root portion The width of (111) gradually increases outward in the radial direction of the punch body (1).
The stator blank according to claim 3 or 4, characterized in that the bottom of the groove of the second left welt groove (32) and the second right welt groove (33) are a section of the punch body (1) The center is the arc formed by the center of the circle.
The stator blank according to claim 2 or 3 or 4, wherein the second tooth portion (12) and the third tooth portion (13) are both straight-toothed, and the second tooth portion (12) is The third tooth portions (13) are symmetrically distributed along a radial center line of the first common welt groove (21), and the notches of the first common welt groove (21) are located at the second tooth portion (12) and the third portion In the middle position between the teeth (13).
The stator punching piece according to claim 2 or 3 or 4, wherein the first left welt groove (22) and the bottom bottom of the first right welt groove (23) are each a section of the punching body (1) The center of the center is the arc formed by the center of the circle.
The stator punching piece according to claim 1 or 2 or 3 or 4, wherein the number of the first groove group (2) and the second groove group (3) is four, wherein the first groove group (2) For winding the secondary winding, and the second slot group (3) for winding the primary winding.
a stator assembly comprising a stator core, an end insulation, a first working winding (4) and a second working winding (5), the end insulation being mounted on an end face of the stator core, characterized in that: The stator core is formed by laminating a plurality of stator punching sheets (1) as described in any one of claims 1 to 9, the first working winding (4) being wound around the first slot group (2), the second working The winding (5) is wound around the second slot group (3), the first working winding (4) includes a plurality of sets of first working coils (41) distributed circumferentially, and a plurality of sets of first working coils (41) Connected together in sequence, the second working winding (5) comprises a plurality of sets of second working coils (51) distributed circumferentially, and the plurality of sets of second working coils (51) are sequentially connected together. The first working coil (41) and the second working coil (51) are arranged in parallel with each other inside and outside, wherein each of the first working coils (41) comprises a plurality of first working inner layer coils (411) and a plurality of first working outer layers The coil (412), the first working inner layer coil (411) is disposed in parallel with the inner and outer portions of the first working outer layer coil (412), and the two ends of the first working inner layer coil (411) are respectively disposed around the adjacent two first slots. An adjacent first right ruled groove (23) and a first left ruled groove (22) of the group (2), and two ends of the first working outer layer coil (412) are respectively disposed around the adjacent two a first common welt groove (21) in a slot set (2), each second working coil (51) comprising a plurality of second working inner layer coils (511) and a plurality of second working outer layer coils (512) The second working inner layer coil (511) is disposed in parallel with the inner and outer coils of the second working outer layer coil (512), and the two ends of the second working inner layer coil (511) are respectively disposed around the adjacent two second slot groups (3) a second adjacent right-hand groove (33) and a second left-line groove (32), and two ends of the second working outer layer coil (511) are respectively disposed around the adjacent two second groove groups The second common welt groove (31) in (3).
The outer rotor motor comprises a rotating shaft (6), a molded stator (7) and an outer rotor (8), the outer rotor (8) is sleeved outside the plastic stator (7), and the rotating shaft (6) is installed in the middle of the plastic stator (7) and Connected to the outer rotor (8) comprising a stator core (71), an end insulation (72), a coil winding (73) and a molding body (74), and an end insulation (72) Mounted on the end face of the stator core (71), the coil winding (73) is wound around the end insulation (72), and the molded body (74) insulates the stator core (71), the end insulation (72), and the coil winding (73) integrally joined, characterized in that the stator core (71) is laminated by a plurality of stator punches (1) as described in any one of claims 1 to 9.