Low-noise motor

Abstract

The invention relates to a low-noise motor, and relates to the technical field of motors, the low-noise motor comprises a shielding sleeve, a stator and a rotor, the shielding sleeve is used for separating the stator and the rotor, the stator comprises a plurality of winding units, each winding unit comprises an iron core, a tooth groove is formed between every two adjacent iron cores, two magnetizers are arranged in each tooth groove, one magnetizer is in contact with the iron core on one side of each tooth groove, and the other magnetizer is in contact with the rotor. And the other magnetizer is in contact with the iron core on the other side of the tooth groove. The motor has the advantage that the noise of the motor can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular to a low-noise motor. Background Art

[0002] The existing motor stator core has a large slot pitch due to the winding process, which will cause the magnetic slot torque to increase and cause motor noise. CN118694028A discloses a stator structure and a motor, which can realize the switching of the stator slot opening and closing by opening the slot opening at a low speed and closing the slot opening at a high speed by a magnetic conductive block. However, when the closing condition is not reached, there is still a large motor noise. Summary of the invention

[0003] In view of the deficiencies in the prior art, one of the purposes of the present application is to provide a low-noise motor, which has the advantage of being able to reduce motor noise.

[0004] The above-mentioned purpose of the present application is achieved through the following technical solutions: A low-noise motor comprises a shielding sleeve, a stator and a rotor. The shielding sleeve is used to separate the stator and the rotor. The stator comprises a plurality of winding units. The winding units comprise an iron core. Tooth slots are formed between adjacent iron cores. Two magnetic conductors are arranged in the tooth slots. One magnetic conductor contacts the iron core on one side of the tooth slot, and the other magnetic conductor contacts the iron core on the other side of the tooth slot.

[0005] In a preferred example, the present application can be further configured as follows: the two magnetic conductors in the same tooth slot are symmetrically arranged, and the symmetry line is the middle line of the two winding units constituting the tooth slot.

[0006] In a preferred example, the present application can be further configured as follows: the distance between two magnetic conductors in the same tooth slot is Z, 0<Z≤3mm.

[0007] In a preferred example, the present application can be further configured as follows: the stator also includes a support frame, a support seat is also provided in the tooth slot, one end of the support seat is connected to the shielding sleeve, and the other end is connected to the support frame.

[0008] In a preferred example, the present application can be further configured as follows: the magnetic conductor is installed on a support seat.

[0009] In a preferred example, the present application can be further configured as follows: the magnetic conductor is installed on the shielding sleeve.

[0010] In a preferred example, the present application can be further configured as follows: the tooth groove is not parallel to the axis.

[0011] This application has the following advantages: 1. By setting the magnetic conductor and 0<Z≤3mm, the cogging torque of the motor can be reduced during operation to reduce the motor noise; that is, the cogging torque can be reduced without reducing the cogging spacing of the core winding, so as to facilitate installation; 2. The support seat can support the shielding sleeve together with the stator, thus improving the pressure resistance of the shielding sleeve; 3. The support seat is connected to the shielding sleeve from the support frame, which can avoid the deformation of the shielding sleeve caused by the expansion of the potted motor at high temperature due to the large thermal expansion coefficient of the potting glue. That is, the potting glue does not contact the shielding sleeve, so that when the potting glue expands, it applies force to the support frame instead of the shielding sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the cross-sectional structure of this application.

[0013] Figure 2 It is a schematic diagram of the structure without a support seat of this application.

[0014] Figure 3 This is a schematic diagram of the position of the magnetic conductor in another embodiment of the present application.

[0015] Figure 4 It is a schematic diagram of the magnetic conductor structure of another embodiment of the present application.

[0016] Figure numerals: 1, shielding sleeve; 2, stator; 21, iron core; 3, tooth slot; 4, support seat; 5, magnetic conductor. DETAILED DESCRIPTION

[0017] The present application is further described in detail below in conjunction with the accompanying drawings.

[0018] Reference Figure 1-Figure 4 , is a low-noise motor disclosed in the present application, comprising a shielding sleeve 1, a stator 2 and a rotor, wherein the shielding sleeve 1 is used to separate the stator 2 and the rotor, the stator 2 comprises a plurality of winding units, the winding units comprise an iron core 21, tooth slots 3 are formed between adjacent iron cores 21, and the tooth slots 3 are not parallel to the axis of the motor. Two magnetizers 5 are arranged in the tooth slots 3, one magnetizer 5 is in contact with the iron core 21 on one side of the tooth slot 3, and the other magnetizer 5 is in contact with the iron core 21 on the other side of the tooth slot 3. In the present embodiment, the magnetizer 5 is a magnetic sheet, which can be made of a material with good magnetic conductivity, such as iron, and is a whole strip or a laminated sheet. In the present embodiment, the shielding sleeve 1 is made of plastic.

[0019] Due to the presence of the magnetizer 5, the original magnetic lines of force are extended from the iron core 21 of the stator 2 to the magnetizer 5, extending the magnetic field, thereby reducing the tooth slot 3 torque generated by the motor during operation, thereby reducing the motor's operating noise and increasing the motor's operating efficiency.

[0020] The two magnetic conductors 5 in the same tooth slot 3 are symmetrically arranged, the symmetry line is the middle line of the two winding units constituting the tooth slot 3, and the spacing between the two magnetic conductors 5 in the same tooth slot 3 is Z, 0<Z≤3mm. Assuming that there are 6 winding units and they are evenly distributed, assuming that two adjacent winding units are located at 0° and 60°, the symmetry line is located at 30°.

[0021] The stator 2 also includes a support frame, the core 21 is mounted on the support frame, and a support seat 4 is provided in the tooth slot 3, one end of the support seat 4 is connected to the shielding sleeve 1, and the other end is connected to the support frame. The support seat 4 is made of non-magnetic material, such as plastic.

[0022] In another embodiment, when the pressure bearing capacity of the shielding sleeve 1 is sufficient, the support seat 4 is not required, and the magnetic conductor 5 is disposed on the shielding sleeve 1 (for example, integrally injected or a groove is provided on the shielding sleeve 1, and the magnetic conductor 5 is inserted into the groove on the shielding sleeve 1), and contacts the corresponding iron core 21. The magnetic conductor 5 can be plate-shaped or step-shaped.

[0023] The implementation principle of this embodiment is: one or more sides of the magnetic conductor 5 are in contact with the iron core 21 of the stator 2, thereby extending the magnetic force of the iron core 21 of the stator 2; in some usage scenarios, when the pressure-bearing capacity of the shielding sleeve 1 is sufficient, there is no need to additionally set up a support seat 4, which not only reduces the electromagnetic eddy current loss, but also extends the magnetic force of the iron core 21 of the stator 2 to reduce the torque of the tooth slot 3, thereby achieving the purpose of reducing the motor noise.

[0024] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low noise motor, characterized in that: The invention comprises a shielding sleeve (1), a stator (2) and a rotor, wherein the shielding sleeve (1) is used to separate the stator (2) and the rotor, the stator (2) comprises a plurality of winding units, the winding units comprise an iron core (21), tooth slots (3) are formed between adjacent iron cores (21), two magnetic conductors (5) are arranged in the tooth slots (3), one magnetic conductor (5) is in contact with the iron core (21) on one side of the tooth slot (3), and the other magnetic conductor (5) is in contact with the iron core (21) on the other side of the tooth slot (3).

2. A low noise motor according to claim 1, characterized in that: The two magnetic conductors (5) in the same tooth slot (3) are symmetrically arranged, and the symmetry line is the middle line of the two winding units constituting the tooth slot (3).

3. A low noise motor according to claim 1, characterized in that: The distance between two magnetic conductors (5) in the same tooth slot (3) is Z, 0<Z≤3mm.

4. A low noise motor according to claim 1, characterized in that: The stator (2) also includes a support frame, and a support seat (4) is also provided in the tooth slot (3). One end of the support seat (4) is connected to the shielding sleeve (1), and the other end is connected to the support frame.

5. A low noise motor according to claim 4, characterized in that: The magnetic conductor is mounted on a support seat (4).

6. A low noise motor according to claim 1, characterized in that: The magnetic conductor is mounted on the shielding sleeve (1).

7. A low noise motor according to claim 1, characterized in that: The tooth groove (3) is not parallel to the axis.

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