CN202309249U - A motor structure - Google Patents

Abstract

The utility model discloses a motor structure, including stator module and rotor subassembly, stator module include stator core (1) and winding, stator core (1) includes yoke portion (10) and inwards extrudes a plurality of teeth (11) from yoke portion (10), two adjacent teeth (11) form rule groove (12), the winding is located rule groove (12) and convolutes on tooth (11), the rotor subassembly includes rotor core (2) and permanent magnet (3), rotor core (2) include annular drawing (22) that are provided with central shaft hole (21) and from a plurality of magnetic conduction blocks (23) of annular drawing (22) outside protrusion, form radial recess (24) that are used for installing permanent magnet (3) between two adjacent magnetic conduction blocks (23), protruding catch hook (26) in both sides magnetic conduction block (23) of opening (25) of radial recess (24), the thickness of stator core (1) is L1, the thickness of the rotor core (2) is L2, L2 is larger than L1, the structure is simple, the volume is small, the magnetic gathering effect is strong, and the cost of the motor is greatly reduced.

Description

A motor structure

Technical field:

The utility model relates to a motor structure.

Background technique:

The traditional motor structure includes a stator assembly and a rotor assembly. The stator assembly includes a stator core and windings. The rotor assembly includes a rotor core and a permanent magnet embedded in the rotor core. The thickness of the stator core and the rotor core are equal. Structural motors have poor magnetic concentration effect, and the motor power cannot meet the high requirements. In order to meet the high requirements of the motor power, the thickness of the stator core and rotor core is usually increased, or stronger magnetic materials are used, but this method increases the The size of the motor is high and the cost is high, which reduces the competitiveness of the motor market.

Invention content:

The purpose of the utility model is to provide a motor structure, which is simple in structure, light and small in size, strong in magnetism gathering effect, and greatly reduces the cost of the motor.

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

A motor structure, including a stator assembly and a rotor assembly, the stator assembly is nested outside the rotor assembly, the stator assembly includes a stator core and a winding, the stator core includes a yoke and a number of teeth protruding inward from the yoke, Two adjacent teeth form a wire groove, and the winding is located in the wire groove and wound on the tooth. The rotor assembly includes a rotor core and a permanent magnet. A plurality of protruding magnetic conductive blocks form radial grooves for installing permanent magnets between two adjacent magnetic conductive blocks, and protrude retaining hooks on both sides of the opening of the radial groove. The thickness of the stator core is L1 less than the thickness of the rotor core is L2.

The above-mentioned difference between the thickness L2 of the rotor core and the thickness L1 of the stator core is in the range of 3mm-50mm.

The above-mentioned difference between the thickness L2 of the rotor core and the thickness L1 of the stator core is in the range of 3mm-20mm.

The above-mentioned difference between the thickness L2 of the rotor core and the thickness L1 of the stator core is in the range of 3mm-10mm.

The cross-sectional shape of the outer surface of the above-mentioned magnetic permeable block is an arc line, and the outer surface is centered at point A which is offset by a certain distance H from the center O of the central axis hole.

The inner surface of the tooth mentioned above is composed of an inwardly curved outer arc in the middle and outer trimming edges on both sides, and the outer surface of the magnetic permeable block cooperates with the inner surface of the tooth.

The above-mentioned outer arcs are circular arcs.

The outer edge of the above-mentioned stator core is provided with several tangent lines, and there are mounting holes on the stator core near the tangent lines.

Compared with the prior art, the utility model has the following effects: 1) the thickness of the stator iron core is L1, the thickness of the rotor iron core is L2, the thickness L2 of the rotor iron core is greater than the thickness L1 of the stator iron core, the motor structure is simple, The volume is light and small, and the magnetic effect is strong, which greatly reduces the cost of the motor; 2) The cross-sectional shape of the outer surface of the magnetic block is an arc line, and the outer surface is a point A that is offset from the center O of the central shaft hole by a certain distance H. The center of the circle reduces the magnetic flux leakage of the rotor core, reduces the cogging torque ripple, the back EMF constant is large, and the back EMF waveform is smooth, which improves the performance of the motor and reduces loss; The arc and the outer trim on both sides are formed. The outer surface of the magnetic block and the inner surface of the tooth cooperate with each other. The outer arc is a circular arc, which can further reduce the magnetic flux leakage and reduce the cogging torque ripple.

Description of drawings:

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a schematic structural view of the utility model.

Fig. 3 is a schematic diagram of the magnetism gathering structure of the stator and rotor of the present invention.

Fig. 4 is a partial enlarged structure diagram of the rotor core of the present invention.

Fig. 5 is a partial enlarged structure diagram of the stator core of the utility model.

Detailed ways:

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

As shown in Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5, a motor structure of the present invention includes a stator assembly and a rotor assembly, the stator assembly is nested outside the rotor assembly, and the stator assembly includes a stator iron Core 1 and windings. The stator core 1 includes a yoke 10 and a number of teeth 11 protruding inward from the yoke 10. Two adjacent teeth 11 form a wire slot 12. The winding is located in the wire slot 12 and wound on the teeth. 11, the rotor assembly includes a rotor core 2 and a permanent magnet 3, the rotor core 2 includes a ring figure 22 with a central axis hole 21 and several magnetic blocks 23 protruding from the outside of the ring figure 22. A radial groove 24 for installing the permanent magnet 3 is formed between the magnetic conductive blocks 23, and a retaining hook 26 protrudes from the magnetic conductive block 23 on both sides of the opening 25 of the radial groove 24. The thickness of the stator core 1 is is L1, the thickness of the rotor core 2 is L2, and L2 is greater than L1; the range of the difference between the thickness L2 of the rotor core 2 and the thickness L1 of the stator core 1 is 3mm-50mm; The range of the difference between the thickness L1 of the core 1 is 3mm-20mm; the range of the difference between the thickness L2 of the rotor core 2 and the thickness L1 of the stator core 1 is 3mm-10mm; the cross-sectional shape of the outer surface 231 of the magnetic block 23 is The arc line, the outer surface 231 is centered on the point A that is offset from the center O of the central shaft hole 21 by a certain distance H; the inner surface of the tooth 11 is formed by the middle inwardly curved outer arc 110 and the circumscribed Side 111 constitutes, and the outer surface of magnetic permeable block 23 and the inner surface of tooth 11 cooperate with each other; Outer arc 110 is arc line; The outer edge of stator core 1 is provided with several tangent lines 13, near tangent line 13, stator iron core 1 is provided with mounting holes 14.

As shown in Figure 3, the dotted lines indicate the magnetic field lines. The rotor core not only has high magnetic permeability in the radial direction, but also has high magnetic permeability in the axial direction. The axial length is used to increase the air gap magnetic flux, and the magnetic steel part with a certain thickness beyond the stator core can be generated in the stator and rotor through the axial magnetic concentration effect of the rotor core. The magnetic flux emitted by the magnetic steel part beyond the thickness of the stator core, except for the normal leakage flux, is all effective and added, and the magnetic flux collection effect is good, which not only ensures that the thickness of the stator and the volume of the motor do not increase, but also greatly reduces the cost of the motor .

Claims (8)

1. A motor structure, comprising a stator assembly and a rotor assembly, the stator assembly is nested outside the rotor assembly, the stator assembly includes a stator core (1) and a winding, the stator core (1) includes a yoke (10) And a number of teeth (11) protrude inward from the yoke (10), two adjacent teeth (11) form a wire slot (12), and the winding is located in the wire slot (12) and wound on the teeth (11) Above, the rotor assembly includes a rotor core (2) and a permanent magnet (3), and the rotor core (2) includes a ring figure (22) provided with a central shaft hole (21) and a ring figure (22) protruding from the outside of the ring figure (22). A plurality of magnetic permeable blocks (23), form radial grooves (24) for installing permanent magnets (3) between two adjacent magnetic permeable blocks (23), at the openings of radial grooves (24) Protruding retaining hooks (26) on both sides of the magnetic conduction block (23) of (25), is characterized in that: the thickness of the stator core (1) is L1 less than the thickness of the rotor core (2) is L2. 2. A motor structure according to claim 1, characterized in that the range of the difference between the thickness L2 of the rotor core (2) and the thickness L1 of the stator core (1) is 3mm-50mm. 3. A motor structure according to claim 2, characterized in that the range of the difference between the thickness L2 of the rotor core (2) and the thickness L1 of the stator core (1) is 3mm-20mm. 4. A motor structure according to claim 3, characterized in that the range of the difference between the thickness L2 of the rotor core (2) and the thickness L1 of the stator core (1) is 3mm-10mm. 5. A motor structure according to claim 1 or 2 or 3 or 4, characterized in that: the cross-sectional shape of the outer surface (231) of the magnetic permeable block (23) is an arc line, and the outer surface (231) is Take the point (A) at a certain distance H from the center O of the center shaft hole (21) as the center of the circle. 6. A motor structure according to claim 5, characterized in that: the inner surface of the tooth (11) is composed of an inwardly curved outer arc (110) in the middle and outer trimming edges (111) on both sides , the outer surface of the magnetic block (23) cooperates with the inner surface of the tooth (11). 7. A motor structure according to claim 6, characterized in that the outer arc (110) is a circular arc. 8. A motor structure according to claim 5, characterized in that: the outer edge of the stator core (1) is provided with a number of tangents (13), near the tangents (13), the stator core (1) is provided with Has mounting holes (14).

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