Low-noise stator and rotor punching sheet assembly

Abstract

The utility model relates to a low-noise stator and rotor punching sheet assembly, which belongs to the technical field of motor parts, and comprises a stator punching sheet and a rotor punching sheet, the stator punching sheet comprises a yoke part and a plurality of stator teeth, the plurality of stator teeth are arranged on the inner side of the yoke part, a wire slot is formed between adjacent stator teeth, the stator tooth part comprises a tooth part and a tooth top, and the tooth top is arranged on the yoke part. The two ends of the tooth part are connected with the yoke part and the tooth crest respectively, the tooth crest comprises two tooth boots, the two tooth boots protrude towards the two sides of the tooth part in the circumferential direction respectively, and the tooth boots are provided with cutting angles inclining towards the interiors of the wire grooves; the rotor punching sheet is provided with a plurality of magnetic shoe grooves, the rotor punching sheet is also provided with air grooves corresponding to the magnetic shoe grooves, the air grooves comprise first air grooves and second air grooves, the first air grooves and the second air grooves are arranged at intervals, magnetic shoe supporting parts are arranged between the first air grooves and the second air grooves, and the magnetic shoe supporting parts are connected with the rotor punching sheet. The permanent magnet motor has the effect of reducing the noise of the permanent magnet motor in the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of motor parts, in particular to a low-noise stator and rotor punching assembly. Background Art

[0002] The stator and rotor laminations of a spoke-type permanent magnet motor are thin sheets of material installed between the stator and rotor to ensure the clearance meets design requirements. Their primary function is to support the rotor, prevent wear between the rotor and stator, and adjust the stator-rotor clearance to improve motor efficiency and smooth operation.

[0003] The permanent magnet motor in the prior art generates a certain amount of noise during operation. The noise and vibration may cause premature wear of motor components, reducing the reliability and service life of the equipment. Utility Model Content

[0004] In order to improve the noise of a permanent magnet motor during use, the present application provides a low-noise stator and rotor punching assembly.

[0005] The present application provides a low-noise stator and rotor punching assembly, which adopts the following technical solution:

[0006] A low-noise stator and rotor punching assembly, comprising a stator punching and a rotor punching, the stator punching and the rotor punching being coaxially matched, the stator punching comprising a yoke and a plurality of stator teeth, the plurality of stator teeth being arranged on the inner side of the yoke and arranged in a circumferential array with the axis of the yoke as the center, with wire slots formed between adjacent stator teeth, the stator tooth portion comprising a tooth portion and a tooth top, the two ends of the tooth portion being connected to the yoke and the tooth top respectively, the tooth top being spaced apart from the rotor punching, the tooth top comprising two tooth shoes, the two tooth shoes respectively protruding to both sides of the tooth portion along the circumferential direction, the tooth shoes being provided with a chamfer inclined toward the inside of the wire slot;

[0007] The rotor punching is provided with a plurality of magnetic tile grooves, which are arranged in a circular array with the axis of the rotor punching as the center. The rotor punching is also provided with air grooves corresponding to the magnetic tile grooves, and the air grooves include a first air groove and a second air groove. The first air groove and the second air groove are arranged at intervals. A magnetic tile support portion is provided between the first air groove and the second air groove, and the magnetic tile support portion is connected to the rotor punching.

[0008] By adopting the above technical solution, the wire slots are used to firmly fix the electric winding coils to prevent them from moving or being damaged when the motor is running; the tooth slot torque and torque pulsation are reduced by setting the chamfer on the tooth shoe, effectively improving the noise of the permanent magnet motor during use; the air slots can reduce the friction between the rotor and the air during rotation, thereby reducing the vibration and noise of the rotor, and the air slots help to improve the heat dissipation efficiency and reduce the temperature during motor operation; by setting the magnetic tile support part, the magnetic leakage phenomenon of the magnetic tile is improved, thereby achieving the effect of increasing the utilization rate of the magnetic tile.

[0009] Preferably, the magnetic tile groove is a closed groove.

[0010] By adopting the above technical solution, the design of the closed slots of the rotor punching sheets can, on the one hand, improve the breath magnetic flux waveform, reduce the rotor harmonic content, and improve the sinusoidality of the back electromotive force waveform, thereby achieving the effect of improving electromagnetic noise. On the other hand, the setting of the rotor closed slots increases the rotor strength, improves the roundness and concentricity of the inner and outer diameters of the rotor, thereby enabling the motor to run at a higher speed while improving noise.

[0011] Preferably, the magnetic tile groove is an open groove, the width of the magnetic tile groove opening is smaller than the width of the magnetic tile groove, and the end wall of the rotor punching corresponding to the magnetic tile groove is flattened.

[0012] By adopting the above technical solution, the end walls of the rotor punchings corresponding to the magnetic shoe grooves are flattened to improve the air magnetic density waveform and reduce the rotor harmonic content, thereby achieving the effect of improving electromagnetic noise.

[0013] Preferably, a magnetic isolation bridge is provided between two adjacent air slots, and end walls of the first air slot and the second air slot close to the magnetic isolation bridge are inclined toward the magnetic isolation bridge.

[0014] By adopting the above technical solution, the gap between two adjacent air slots is reduced through an inclined setting, that is, the thickness of the magnetic isolation bridge is reduced. The smaller the thickness of the magnetic isolation bridge, the easier it is to form magnetic saturation, and more magnetic density lines can be guided to form effective magnetic flux, and the leakage magnetic flux is also smaller, thereby increasing the utilization rate of the magnetic tile.

[0015] Preferably, the angle between the tooth shoe and the wire groove is 90 degrees, and the angle between the two tooth shoes is 130 degrees.

[0016] Preferably, the angle between the tooth shoe and the wire groove is 90 degrees, and the angle between the two tooth shoes is 115.5 degrees.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. The chamfered angle on the tooth shoe reduces the cogging torque and torque ripple, effectively improving the noise of the permanent magnet motor during use;

[0019] 2. By setting up the magnetic tile support part, the phenomenon of magnetic tile leakage is improved, thereby achieving the effect of increasing the utilization rate of the magnetic tile. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0021] Figure 2 This is a detailed view of the rotor punching in Example 1 of the present application.

[0022] Figure 3 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0023] Figure 4 This is a detailed view of the rotor punching in Example 2 of the present application.

[0024] Explanation of the accompanying reference numerals: 1. stator punching sheet; 11. yoke; 12. stator tooth; 121. tooth portion; 122. tooth top; 123. tooth shoe; 124. chamfer; 13. wire slot; 2. rotor punching sheet; 21. magnetic tile slot; 22. air slot; 221. first air slot; 222. second air slot; 223. magnetic tile support portion; 23. magnetic isolation bridge; 24. flattened portion. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-4 The utility model is described in further detail.

[0026] Example 1:

[0027] The present application discloses a low-noise stator and rotor punching assembly, referring to Figure 1 and Figure 2 , including a stator punching 1 and a rotor punching 2, the stator punching 1 and the rotor punching 2 are coaxially matched, the stator punching 1 includes a yoke 11 and a plurality of stator teeth 12, in the embodiment of the present application, there are twelve stator teeth 12, the twelve stator teeth 12 are arranged on the inner side of the yoke 11, and the twelve stator teeth 12 are arranged in a circular array with the axis of the yoke 11 as the center, and wire slots 13 are formed between adjacent stator teeth 12, and the wire slots 13 can firmly fix the electric winding coil to prevent it from moving or being damaged when the motor is running.

[0028] Reference Figure 1 and Figure 2The stator teeth 12 include a tooth portion 121 and a tooth top 122. The ends of the tooth portion 121 are integrally formed with the yoke 11 and the tooth top 122, respectively. The tooth top 122 is spaced apart from the rotor sheet 2. The tooth top 122 includes two tooth shoes 123, which protrude from either side of the tooth portion 121 along the circumferential direction. The tooth shoes 123 are provided with chamfers 124 that are inclined toward the inside of the slot 13. The provision of chamfers 124 reduces cogging torque and torque ripple, effectively improving the noise level of the permanent magnet motor during use.

[0029] Reference Figure 1 and Figure 2 The rotor punching 2 is provided with a plurality of magnetic tile grooves 21. In the embodiment of the present application, there are twelve magnetic tile grooves 21, and the twelve magnetic tile grooves 21 are arranged in a circular array with the axis of the rotor punching 2 as the center. The rotor punching 2 is provided with air grooves 22 corresponding to the magnetic tile grooves 21. The air grooves 22 can reduce the friction between the rotor and the air during rotation, thereby reducing the vibration and noise of the rotor, and the air grooves 22 help to improve the heat dissipation efficiency and reduce the temperature when the motor is running.

[0030] Reference Figure 1 and Figure 2 The magnetic tile groove 21 is a closed groove, the angle between the tooth shoe 123 and the line slot 13 is 90 degrees, and the angle between the two tooth shoes 123 is 130 degrees; the design of the closed groove of the rotor punching 2 can, on the one hand, improve the breath magnetic density waveform, reduce the rotor harmonic content, and make the back electromotive force waveform more sinusoidal, thereby achieving the effect of improving electromagnetic noise. On the other hand, the setting of the rotor closed groove increases the rotor strength, improves the roundness and inner and outer diameter concentricity of the rotor, thereby improving the noise while making the motor run at a higher speed.

[0031] Reference Figure 1 and Figure 2 The air slot 22 includes a first air slot 221 and a second air slot 222. The first air slot 221 and the second air slot 222 are spaced apart. A magnetic tile support portion 223 is provided between the first air slot 221 and the second air slot 222. The magnetic tile support portion 223 is integrally formed with the rotor punching 2. By setting the magnetic tile support portion 223, the phenomenon of magnetic tile leakage is improved, thereby achieving the effect of increasing the utilization rate of the magnetic tile.

[0032] Reference Figure 1 and Figure 2 A magnetic isolation bridge 23 is provided between two adjacent air slots 22. The end walls of the first air slot 221 and the second air slot 222 close to the magnetic isolation bridge 23 are inclined toward the magnetic isolation bridge 23. The inclined setting reduces the gap between the two adjacent air slots 22, that is, the thickness of the magnetic isolation bridge 23 is reduced. The smaller the thickness of the magnetic isolation bridge 23, the easier it is to form magnetic saturation, and more magnetic density lines can be guided to form effective magnetic flux, and the leakage magnetic flux is also smaller, thereby increasing the utilization rate of the magnetic tile.

[0033] Example 2:

[0034] The difference from the first embodiment is that, referring to Figure 3 and Figure 4 The magnetic tile groove 21 is an open groove, the width of the opening of the magnetic tile groove 21 is smaller than the width of the magnetic tile groove 21, the end wall corresponding to the rotor punching 2 and the magnetic tile groove 21 is flattened, and the angle between the tooth shoe 123 and the line slot 13 is 90 degrees, and the angle between the two tooth shoes 123 is 115.5 degrees. The end wall corresponding to the rotor punching 2 and the magnetic tile groove 21 is flattened to form a flattened portion 24, which improves the breath magnetic density waveform and reduces the rotor harmonic content, thereby achieving the effect of improving electromagnetic noise.

[0035] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A low-noise stator and rotor punching assembly, characterized in that: The invention comprises a stator punching sheet (1) and a rotor punching sheet (2), wherein the stator punching sheet (1) and the rotor punching sheet (2) are coaxially matched, the stator punching sheet (1) comprises a yoke (11) and a plurality of stator teeth (12), the plurality of stator teeth (12) are arranged on the inner side of the yoke (11), and the plurality of stator teeth (12) are arranged in a circumferential array with the axis of the yoke (11) as the center, and a line slot (13) is formed between adjacent stator teeth (12), and the stator teeth (12) are arranged in a circumferential array with the axis of the yoke (11) as the center. The tooth portion (121) includes a tooth portion (121) and a tooth top (122), the two ends of the tooth portion (121) are respectively connected to the yoke portion (11) and the tooth top (122), the tooth top (122) is spaced apart from the rotor punching (2), the tooth top (122) includes two tooth shoes (123), the two tooth shoes (123) respectively protrude toward both sides of the tooth portion (121) along the circumferential direction, and the tooth shoes (123) are provided with a chamfer (124) inclined toward the inside of the wire slot (13); The rotor punching (2) is provided with a plurality of magnetic tile grooves (21), and the plurality of magnetic tile grooves (21) are arranged in a circumferential array with the axis of the rotor punching (2) as the center. The rotor punching (2) is also provided with air grooves (22) corresponding to the magnetic tile grooves (21), and the air grooves (22) include a first air groove (221) and a second air groove (222), and the first air groove (221) and the second air groove (222) are arranged at intervals. A magnetic tile support portion (223) is provided between the first air groove (221) and the second air groove (222), and the magnetic tile support portion (223) is connected to the rotor punching (2).

2. The low-noise stator and rotor punching assembly according to claim 1, characterized in that: The magnetic tile groove (21) is a closed groove.

3. The low-noise stator and rotor punching assembly according to claim 1, characterized in that: The magnetic tile groove (21) is an open groove, the width of the opening of the magnetic tile groove (21) is smaller than the width of the magnetic tile groove (21), and the end walls of the rotor punching (2) corresponding to the magnetic tile groove (21) are flattened.

4. The low-noise stator and rotor punching assembly according to claim 2 or 3, characterized in that: A magnetic isolation bridge (23) is provided between two adjacent air slots (22), and the end walls of the first air slot (221) and the second air slot (222) close to the magnetic isolation bridge (23) are inclined toward the magnetic isolation bridge (23).

5. The low-noise stator and rotor punching assembly according to claim 2, characterized in that: The angle between the tooth shoe (123) and the wire groove (13) is 90 degrees, and the angle between the two tooth shoes (123) is 130 degrees.

6. The low-noise stator and rotor punching assembly according to claim 3, characterized in that: The angle between the tooth shoe (123) and the wire groove (13) is 90 degrees, and the angle between the two tooth shoes (123) is 115.5 degrees.

Images