CN205453322U - A stator punch, a stator assembly and an outer rotor motor - Google Patents

Abstract

The utility model discloses a stator punching sheet, stator module and external rotor electric machine, the stator punching sheet include annular yoke portion and from a plurality of first tooth portions and the second tooth portion that go out on the edge of annular yoke portion outside, first tooth portion and the alternative circumference of second tooth portion are arranged, the second tooth portion includes public root of tooth, from the last at least 4 dogtooths that go out of public root of tooth, form first looks scarf joint groove between 2 adjacent dogteeth, form second looks scarf joint groove between adjacent second tooth portion and the first tooth portion, first looks scarf joint groove is shallow along stator punching sheet radial direction's degree of depth second looks scarf joint groove along stator punching sheet radial direction's degree of depth, it can improve the performance of motor.

Description

A stator punch, a stator assembly and an outer rotor motor

Technical field:

The utility model relates to a stator punch, a stator assembly and an outer rotor motor, belonging to the technical field of motors.

Background technique:

Current motors, such as plastic-sealed external rotor motors, include a plastic-sealed stator and a motor rotor. The plastic-encapsulated stator includes a stator core formed by laminating several stator punches, and a main coil winding and an auxiliary coil winding wound on the stator core.

The conventional structure of the model of the stator stamping in the prior art is that each embedding slot has the same size and shape and is evenly distributed on the outside of the circumference. Although this structure is simple and convenient for mold making, it is inconvenient for winding and arranging wires, and the ends of the windings are long and high, resulting in a large consumption of motor materials and high costs. Moreover, since the wire slots are all located on the outside, the teeth are narrower, resulting in a higher magnetic density of the stator teeth, thereby affecting the performance and efficiency of the motor.

Invention content:

The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art, and provide a stator punch, a stator assembly and an outer rotor motor, which can improve the performance of the motor.

The purpose of this utility model is achieved through the following technical solutions.

A stator punching plate, including an annular yoke and a plurality of first teeth and second teeth protruding from the outer edge of the annular yoke, the first teeth and the second teeth are arranged alternately in the circumferential direction, and the second teeth The part includes a common dedendum part, at least 4 protruding teeth protruding from the common dedendum part, a first phase ruled line groove is formed between two adjacent protruding teeth, and the adjacent second tooth part and the first tooth part A second phase embedding groove is formed between them, and the depth of the first phase embedding groove along the radial direction of the stator punch is shallower than the depth of the second phase embedding groove along the radial direction of the stator punch.

The number of the protruding teeth protruding from the common tooth root is 5, including the first left-curved tooth, the second left-curved tooth, straight teeth, the first right-curved tooth and the second right-curved tooth, the first left-curved tooth The teeth and the first right-curved teeth are symmetrically distributed relative to the straight teeth, and the second left-curved teeth and the second right-curved teeth are symmetrically distributed relative to the straight teeth.

The number of the first tooth portion and the second tooth portion are both six.

A stator assembly comprising a stator core, an end insulation, a first phase winding and a second phase winding, the end insulation is mounted on the end face of the stator core, the stator core is composed of a number of stator punches as described above The first phase winding is accommodated in the first phase wire embedding groove, and the second phase winding is accommodated in the second phase wire embedding groove.

The above-mentioned first-phase winding includes multiple groups of coils distributed at intervals along the circumferential direction, and the multiple groups of coils are connected together in turn, and each group of coils includes several turns of the first coil and several turns of the second coil, and the first coil and the second coil are placed in different positions. The first phase is embedded in the wire groove and wound alternately.

The number of the first phase embedding slots is 24, and the number of the second phase embedding slots is 12.

The spans of the first coil and the second coil are equal, and the first coil and the second coil respectively straddle one first phase embedding slot and one first tooth portion.

A plurality of arc-shaped protrusions are provided on the top surface of the end insulation, and the arc-shaped protrusions are used to separate the first coil and the second coil in each group of coils.

The above-mentioned first phase winding refers to the main winding, and the second phase winding refers to the auxiliary winding.

An external rotor motor includes a rotating shaft, a plastic-encapsulated stator and an outer rotor. The outer rotor is sheathed outside the plastic-enclosed stator. The rotating shaft is installed in the middle of the plastic-enclosed stator and connected with the outer rotor. The assembly is integrated with the plastic package, and the stator assembly is the stator assembly described above.

Compared with the prior art, the utility model has the following effects:

1) The second tooth part includes a common tooth root and at least 4 protruding teeth protruding from the common tooth root. A second phase-inlaid slot is formed between the first tooth portion, and the depth of the first phase-inlaid slot along the radial direction of the stator punch is shallower than that of the second phase-inlaid slot along the radial direction of the stator punch Depth, improving the structure of the stator punching, reducing the cost, and effectively improving the magnetic density and torque ripple of the stator punching, so that the performance of the stator punching is improved, and the motor efficiency and performance are better;

2) The number of protruding teeth protruding from the common tooth root is 5, the number of the first tooth part and the second tooth part are both 6, that is, the number of the first phase inlaid wire slot and the second phase inlaid wire slot The total number is 36. Compared with the stator punching sheet with 24 slot structure, the stator punching sheet with 36 slot structure has better magnetic density and torque ripple performance, and the winding and arranging are more convenient, and the winding end is shorter, which effectively reduces the Consumption of motor materials;

3) The first phase winding is accommodated in the first phase wire groove, the second phase winding is accommodated in the second phase wire groove, the first phase winding includes multiple sets of coils spaced along the circumferential direction, and the multiple sets of coils Connected together in turn, each group of coils includes several turns of the first coil and several turns of the second coil, the first coil and the second coil are placed in different first phase embedding slots and wound alternately, effectively solving the problem of winding, so that The winding becomes convenient, and the magnetic field can be evenly distributed, so that the efficiency of the motor can be improved and the performance of the motor can be improved;

4) A number of arc-shaped protrusions are provided on the top surface of the end insulation. The arc-shaped protrusions are used to separate the first coil and the second coil in each group of coils. After the first coil is wound, the arc-shaped protrusions At the same time, the first phase embedding slot can be vacated for the second coil, and the first phase embedding slot can be avoided by the first coil wound first, thereby facilitating the winding of the second coil and improving the winding efficiency.

Description of drawings:

Fig. 1 is a schematic structural view of a stator punch in an embodiment;

Fig. 2 is a perspective view of a stator assembly in an embodiment;

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

Fig. 4 is the perspective view of outer rotor motor in the embodiment;

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

detailed description:

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment 1: As shown in Figure 1, this embodiment is a stator punching plate 1, including an annular yoke 10 and a number of first teeth 11 and second teeth protruding from the outer edge of the annular yoke 10 12. The first tooth portion 11 and the second tooth portion 12 are alternately arranged in the circumferential direction. The second tooth portion 12 includes a common tooth root portion 121 and at least four protruding teeth 122 protruding from the common tooth root portion 121. The adjacent 2 A first phase embedding groove 13 is formed between two protruding teeth 122, and a second phase embedding groove 14 is formed between adjacent second teeth 12 and first teeth 11, and the first phase embedding groove 13 is along the The radial depth of the stator punch 1 is shallower than the depth of the second phase embedding groove 14 along the radial direction of the stator punch 1 . The number of convex teeth 122 protruding from the common dedendum 121 is five, including a first left curved tooth 1221, a second left curved tooth 1222, a straight tooth 1223, a first right curved tooth 1224 and a second right curved tooth 1225 , the first left curved teeth 1221 and the first right curved teeth 1224 are symmetrically distributed relative to the straight teeth 1223 , and the second left curved teeth 1222 and the second right curved teeth 1225 are symmetrically distributed relative to the straight teeth 1223 . The number of the first tooth portion 11 and the second tooth portion 12 are both six.

Embodiment 2: As shown in Figure 2 and Figure 3, this embodiment is a stator assembly, including stator core 2, end insulation 3, first phase winding 4 and second phase winding 5, and end insulation 3 is installed On the end face of the stator core 2 , the stator core 2 is formed by laminating several stator punches 1 as described in the first embodiment, and the specific structure of the stator punches 1 will not be repeated here. The first phase winding 4 is accommodated in the first phase wire slot 13 , and the second phase winding 5 is accommodated in the second phase wire slot 14 . The first phase winding 4 includes multiple groups of coils 41 distributed at intervals in the circumferential direction, and the multiple groups of coils 41 are connected together in turn, and each group of coils 41 includes several turns of the first coil 411 and several turns of the second coil 412, the first coil 411 and the second coil 412 are placed in different first-phase wire slots 13 and wound alternately and overlapped. The number of the first phase embedding slots 13 is 24, and the number of the second phase embedding slots 14 is 12. The spans of the first coil 411 and the second coil 412 are equal, and the first coil 411 and the second coil 412 respectively straddle one first phase embedding slot 13 and one first tooth portion 11 . Several arc-shaped protrusions 31 are provided on the top surface of the end insulation 3 , and the arc-shaped protrusions 31 are used to separate the first coil 411 and the second coil 412 in each group of coils 41 . The first phase winding 4 refers to the main winding, and the second phase winding 5 refers to the auxiliary winding.

Embodiment 3: As shown in Figure 4 and Figure 5, this embodiment is an external rotor motor, including a rotating shaft 6, a plastic-enclosed stator 7 and an outer rotor 8, the outer rotor 8 is sleeved outside the plastic-enclosed stator 7, and the rotating shaft 6 is installed on the The plastic-sealed stator 7 is in the middle and connected with the outer rotor 8. The plastic-sealed stator 7 includes a stator assembly and a plastic-sealed body 71. The stator assembly and the plastic-sealed body 71 are integrated. The stator assembly is the stator described in the second embodiment above. Components are not described here.

The above embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention are equivalent All replacement methods are included within the protection scope of the present invention.

Claims (10)

1. null1. a stator punching，Including ring-shaped yoke portion (10) and from ring-shaped yoke portion (10) outer ledge toward some first teeth portion (11) of overhanging and the second teeth portion (12)，First teeth portion (11) and the second teeth portion (12) replace circumferential array，It is characterized in that: the second teeth portion (12) includes public root portion (121)、Toward at least 4 double wedges (122) overhang from public root portion (121)，The first phase line embedding groove (13) is formed between 2 adjacent double wedges (122)，The second phase line embedding groove (14) is formed between adjacent the second teeth portion (12) and the first teeth portion (11)，Described first phase line embedding groove (13) is shallower than the described second phase line embedding groove (14) degree of depth along stator punching (1) radial direction along the degree of depth of stator punching (1) radial direction.
2. A kind of stator punching the most according to claim 1, it is characterized in that: from public root portion (121), the quantity toward the double wedge (122) overhang is 5, including the first left curved tooth (1221), second left curved tooth (1222), straight-tooth (1223), first right curved tooth (1224) and the second right curved tooth (1225), first left curved tooth (1221) curved tooth (1224) right with first is symmetrical relative to straight-tooth (1223), second left curved tooth (1222) curved tooth (1225) right with second is symmetrical relative to straight-tooth (1223).
3. A kind of stator punching the most according to claim 1 and 2, it is characterised in that: described first teeth portion (11) is 6 with the quantity of the second teeth portion (12).
4. 4. a stator module, including stator core (2), overhang insulation (3), the first phase winding (4) and the second phase winding (5), overhang insulation (3) is arranged on the end face of stator core (2), it is characterized in that: described stator core (2) is overrided to form by some stator punchings (1) as described by any one of claims 1 to 3, first phase winding (4) is placed in the first phase line embedding groove (13) the inside, and the second phase winding (5) is placed in the second phase line embedding groove (14) the inside.
5. A kind of stator module the most according to claim 4, it is characterized in that: described first phase winding (4) includes organizing circumferentially spaced coil (41) more, organize coil (41) to be connected in turn more, often organizing coil (41) and include some circle first coils (411) and some circles the second coil (412), first coil (411) is placed in different first phase line embedding groove (13) the insides staggered lap wound from the second coil (412).
6. A kind of stator module the most according to claim 5, it is characterised in that: the quantity of described first phase line embedding groove (13) is 24, and the quantity of described second phase line embedding groove (14) is 12.
7. 7. according to a kind of stator module described in claim 5 or 6, it is characterized in that: first coil (411) is equal with the span of the second coil (412), first coil (411) is crossed over 1 the first phase line embedding groove (13) respectively and strides across 1 the first teeth portion (11) with the second coil (412).
8. 8. according to a kind of stator module described in claim 5 or 6, it is characterized in that: be provided with some arc convex (31) on the end face of overhang insulation (3), arc convex (31) is used for separating the first coil (411) often organized in coil (41) and the second coil (412).
9. 9. according to a kind of stator module described in claim 4 or 5 or 6, it is characterised in that: described first phase winding (4) refers to that main winding, described second phase winding (5) refer to auxiliary winding.
10. 10. an external rotor electric machine, including rotating shaft (6), plastic packaging stator (7) and outer rotor (8), outer rotor (8) is sheathed on plastic packaging stator (7) outside, rotating shaft (6) is arranged in the middle of plastic packaging stator (7) and links together with outer rotor (8), described plastic packaging stator (7) includes stator module and plastic-sealed body (71), stator module and plastic-sealed body (71) connect to one, it is characterised in that: described stator module is the stator module described by any one of claim 4 to 9.