Sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation

Abstract

The utility model relates to a sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation, which comprises a rotor and a stator, the rotor comprises a rotor core, a shaft core and magnetic steel, the shaft core is fixedly installed inside the rotor core, the magnetic steel is fixedly installed outside the rotor core, and the shaft core is fixedly installed outside the rotor core. The stator comprises a rotor iron core, an enameled wire armature winding and an air gap, the air gap is arranged outside the magnetic steel, the enameled wire armature winding is fixedly installed inside the rotor iron core, and the rotor is rotatably connected inside the rotor iron core. According to the sine wave surface magnetic steel structure capable of reducing the electromagnetic torque pulsation, the outer surface of the magnetic steel is made into an arc-shaped structure, so that the air gap flux density waveform of the motor is in a sine wave state, the electromagnetic torque pulsation of the motor can be effectively reduced when the inner rotor permanent magnet direct current brushless motor rotates, and therefore vibration and noise are effectively reduced; the stability and the overall performance of the motor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic steel, in particular to a sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation. Background Art

[0002] The outer rotor permanent magnet brushless DC motor consists of two parts: the motor body and the electronic controller. It is a typical mechatronics industrial product with long life, low noise and strong controllability. It has become increasingly popular in the small household appliance industry in recent years. Magnet is an alloy material with strong magnetism, usually composed of iron, nickel, cobalt and other elements. Magnet is widely used in motors, generators, transformers, sensors and other electromagnetic equipment to generate and conduct magnetic fields. Magnet is usually used to manufacture magnets for motors and generators, magnetic cores for sensors, magnetic components for electromagnets, etc.

[0003] The common inner rotor permanent magnet DC brushless motors on the market mainly use tile-shaped magnets and square magnets. These two magnet structures cannot solve the problem of large electromagnetic torque pulsation when the motor is running, so a sine wave surface magnet magnet structure is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sine wave surface magnetic steel structure which can reduce electromagnetic torque pulsation, has the advantages of small electromagnetic torque pulsation, and solves the problem of large electromagnetic torque pulsation.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation, comprising a rotor and a stator, wherein the rotor comprises a rotor core, an axis core and a magnetic steel, wherein the axis core is fixedly mounted inside the rotor core, and the magnetic steel is fixedly mounted outside the rotor core, and the stator comprises a rotor core, an enameled wire armature winding and an air gap, wherein the air gap is provided outside the magnetic steel, and the enameled wire armature winding is fixedly mounted inside the rotor core, and the rotor is rotatably connected to the inside of the rotor core.

[0006] Furthermore, the air gaps are symmetrically distributed along the vertical center line of the stator.

[0007] Furthermore, the side of the magnetic steel away from the rotor core is an arc-shaped structure.

[0008] Furthermore, the magnetic steel is in contact with the outer surface of the rotor core.

[0009] Furthermore, the vertical center line of the rotor coincides with the vertical center line of the stator.

[0010] Furthermore, the enameled wire armature winding is distributed in the slots of the rotor core.

[0011] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0012] The sine wave surface magnetic steel structure that can reduce electromagnetic torque pulsation has an arc-shaped outer surface of the magnetic steel, which makes the motor air gap magnetic density waveform present a sine wave state, so that the motor electromagnetic torque pulsation can be effectively reduced when the inner rotor permanent magnet DC brushless motor is rotating and running, thereby effectively reducing vibration and noise, and improving the stability and overall performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a three-dimensional diagram of the shaft core and the rotor core of the utility model structure.

[0015] In the figure: 1, rotor; 101, rotor core; 102, shaft core; 103, magnetic steel; 2, stator; 201, air gap; 202, rotor core; 203, enameled wire armature winding. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-2 In this embodiment, a sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation includes a rotor 1 and a stator 2. The rotor 1 includes a rotor core 101, an axis core 102 and a magnetic steel 103. The axis core 102 is fixedly installed inside the rotor core 101, and the magnetic steel 103 is fixedly installed outside the rotor core 101. The stator 2 includes a rotor core 202, an enameled wire armature winding 203 and an air gap 201. The air gap 201 is arranged outside the magnetic steel 103, and the enameled wire armature winding 203 is fixedly installed inside the rotor core 202. The rotor 1 is rotatably connected to the inside of the rotor core 202, and the enameled wire armature winding 203 is surrounded and distributed in the slots of the rotor core 202. The air gap 201 is symmetrically distributed along the vertical center line of the stator 2.

[0018] It should be noted that the outer surface of the magnetic steel 103 is made into an arc structure, which makes the air gap magnetic flux waveform of the motor present a sinusoidal wave state, so that when the inner rotor permanent magnet DC brushless motor rotates, it can effectively reduce the electromagnetic torque pulsation of the motor, reduce vibration and noise, and improve the stability and overall performance of the motor.

[0019] In this embodiment, the side of the magnetic steel 103 away from the rotor core 101 is an arc-shaped structure, and the magnetic steel 103 is in contact with the outer surface of the rotor core 101 .

[0020] Among them, compared with the tile-shaped magnetic steel and the square magnetic steel, the arc structure on the surface of the magnetic steel 103 has a very good air gap magnetic density waveform, which can better reduce vibration and noise.

[0021] In this embodiment, the vertical center line of the rotor 1 and the vertical center line of the stator 2 coincide with each other.

[0022] The working principle of the above embodiment is: when the enameled wire armature winding 203 is energized, the magnetic steel 103 will drive the rotor core 101 to rotate, and the lower surface of the magnetic steel 103 is made into an arc shape, which can effectively fit the arc surface of the rotor core 101 and the rotor core 101 is provided with a clamping position, which is bonded to form a whole, so that the motor magnetic circuit is connected without gaps, and the leakage magnetic flux is reduced, which can effectively improve the electromagnetic torque of the motor and improve the motor efficiency. The outer surface of the magnetic steel 103 is made into an arc structure, which makes the air gap magnetic density waveform of the motor present a sine wave state, so that the inner rotor permanent magnet DC brushless motor can effectively reduce the electromagnetic torque pulsation of the motor, reduce vibration and noise, and improve the stability and overall performance of the motor when it rotates.

[0023] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation, comprising a rotor (1) and a stator (2), characterized in that: The rotor (1) comprises a rotor core (101), an axis core (102) and a magnetic steel (103); the axis core (102) is fixedly mounted inside the rotor core (101); the magnetic steel (103) is fixedly mounted outside the rotor core (101); the stator (2) comprises a rotor core (202), an enameled wire armature winding (203) and an air gap (201); the air gap (201) is provided outside the magnetic steel (103); the enameled wire armature winding (203) is fixedly mounted inside the rotor core (202); and the rotor (1) is rotatably connected inside the rotor core (202).

2. The sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation according to claim 1, characterized in that: The air gaps (201) are symmetrically distributed along the vertical center line of the stator (2).

3. The sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation according to claim 1, characterized in that: The side of the magnetic steel (103) away from the rotor core (101) is an arc-shaped structure.

4. The sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation according to claim 1, characterized in that: The magnetic steel (103) is in contact with the outer surface of the rotor core (101).

5. The sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation according to claim 1, characterized in that: The vertical center line of the rotor (1) and the vertical center line of the stator (2) coincide with each other.

6. The sine wave surface magnetic steel structure capable of reducing electromagnetic torque pulsation according to claim 1, characterized in that: The enameled wire armature winding (203) is distributed in the slots of the rotor iron core (202).

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