Light composite motor stator magnetic pole

Abstract

The utility model provides a light composite motor stator magnetic pole which is of a symmetrical structure and is composed of a pole body and a pole shoe which are connected with each other, projections of the pole body and the pole shoe on the front face of the magnetic pole are rectangular, and the length of the pole body is smaller than that of the pole shoe. The pole body is provided with a plurality of vertically arranged first lightening holes. The length of the pole body is set, so that not only is the weight reduced, but also the whole copper wire wound on the pole body is blocked and limited by the pole shoe, so that the winding structure of the copper wire is more stable; the arrangement of the first lightening holes effectively reduces the weight of the magnetic poles, thereby reducing the overall weight of the motor, and facilitating the improvement of the energy efficiency ratio and the operation efficiency of the motor. Due to the arrangement of the first lightening holes, the use amount of materials is reduced, so that the production cost is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a magnetic pole, in particular to a lightweight composite motor stator magnetic pole. Background Art

[0002] The primary function of a motor's stator poles is to generate a magnetic field, which interacts with the rotor to produce rotational torque. In traditional motor designs, stator poles typically employ a solid structure. While this design provides sufficient strength and stability, it also has some significant drawbacks. First, solid poles are heavy, which not only increases the overall weight of the motor but also adversely affects its energy efficiency and dynamic response. Second, solid poles have a low material utilization rate, resulting in material waste and increased costs. Furthermore, solid poles tend to expand in high-temperature environments, affecting the motor's stability and lifespan.

[0003] In existing technologies, optimizing magnetic pole materials and designs to improve motor performance and reduce costs is often employed to reduce weight and lower costs. For example, replacing traditional ferromagnetic materials with lightweight alloys reduces weight to a certain extent, but the alloys' poor magnetic properties reduce motor efficiency and power density.

[0004] Therefore, how to overcome the above-mentioned defects has become a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses a lightweight composite motor stator pole.

[0006] The utility model provides a lightweight composite motor stator magnetic pole, which has a symmetrical structure and is composed of a pole body and a pole shoe connected to each other, wherein the length of the pole body is shorter than the length of the pole shoe;

[0007] The pole body is provided with a plurality of vertically arranged first weight-reducing holes and second weight-reducing holes;

[0008] A first copper sleeve is embedded in the first weight-reducing hole;

[0009] The second weight-reducing hole is inlaid with a second copper sleeve.

[0010] 1. The length setting of the pole body not only reduces weight, but also the copper wire wrapped around the pole body is blocked and limited by the pole shoe as a whole, making the structure of the copper wire winding more stable; 2. The setting of the first weight-reducing hole and the second weight-reducing hole effectively reduces the weight of the magnetic pole, thereby reducing the overall weight of the motor, which helps to improve the energy efficiency ratio and operating efficiency of the motor; 3. The setting of the first weight-reducing hole and the second weight-reducing hole reduces the amount of material used, thereby reducing production costs and improving economic benefits; since the magnetic pole is fixedly connected, the first weight-reducing hole and the second weight-reducing hole will not affect the stability and strength of the motor stator, thereby reducing material waste and improving material utilization; 4. The setting of the first weight-reducing hole and the second weight-reducing hole increases the surface area of ​​the magnetic pole, which helps to improve the heat dissipation performance of the motor, reduce the temperature during motor operation, and extend the service life of the motor; 5. The weight-reduced magnetic pole will not affect the performance of the motor. On the contrary, the response speed and operating efficiency of the motor will be improved due to the weight reduction.

[0011] If the first weight-reducing hole and the second weight-reducing hole pass through the pole shoe, magnetic leakage is likely to occur, resulting in unstable magnetic field in the electrode. Based on this, further improvements are made in that one end of the first weight-reducing hole and the second weight-reducing hole pass through the pole body, and the other end extends to the side of the pole shoe connected to the pole body.

[0012] The shapes of the first and second weight-reducing holes directly affect the structural stability of the pole body. Based on this, a further improvement is that the first and second weight-reducing holes are oblong holes.

[0013] Since the pressure of the coil on the pole body is mainly concentrated at four points of the pole body when the coil is wound on the pole body, in order to improve the structural stability of the pole body, a further design is: the symmetry line in the length direction of the first weight-reducing hole coincides with the line connecting the diagonals of the pole body.

[0014] The magnetic pole and the copper sleeve are generally connected by interference fit. Due to the inconsistent thermal expansion and contraction of the magnetic pole and the copper sleeve, the magnetic pole and the copper sleeve are prone to separation. Based on this, further improvements are: the first copper sleeve is connected and fixed to the inner wall of the first weight-reducing hole by welding; the second copper sleeve is connected and fixed to the inner wall of the second weight-reducing hole by welding.

[0015] Furthermore, the two long sides of the pole body are provided with outward protrusions, which are arc-shaped. This arrangement not only improves the strength of the magnetic pole, but also increases the volume of the pole body, thereby increasing the magnetic force and making the motor run more stable.

[0016] The beneficial effects of the present invention are: 1. The length setting of the pole body not only achieves weight reduction, but also the copper wire wound on the pole body is blocked and limited by the pole shoe as a whole, making the structure of the copper wire winding more stable; 2. The setting of the first weight-reducing hole and the second weight-reducing hole effectively reduces the weight of the magnetic pole, thereby reducing the overall weight of the motor, which helps to improve the energy efficiency ratio and operating efficiency of the motor; 3. The setting of the first weight-reducing hole and the second weight-reducing hole reduces the amount of material used, thereby reducing production costs and improving economic benefits; since the magnetic pole is fixedly connected, the first weight-reducing hole and the second weight-reducing hole will not affect the stability and strength of the motor stator, thereby reducing material waste and improving material utilization; 4. The setting of the first weight-reducing hole and the second weight-reducing hole increases the surface area of ​​the magnetic pole, which helps to improve the heat dissipation performance of the motor, reduce the temperature during motor operation, and extend the service life of the motor; 5. The weight-reduced magnetic pole will not affect the performance of the motor. On the contrary, the response speed and operating efficiency of the motor will be improved due to the weight reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is the main view of the utility model;

[0020] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0021] In the figure: 1. Pole body; 2. Pole shoe; 3. First weight-reducing hole; 4. Second weight-reducing hole; 5. First copper sleeve; 6. Second copper sleeve. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0023] like Figure 1 and Figure 2 As shown, the utility model discloses a lightweight composite motor stator pole, made of magnetic steel, with a symmetrical structure, consisting of a pole body 1 and a pole shoe 2 connected to each other. The outer surface of the pole body 1 is a convex arc, which is used to fit the inner wall of the motor housing; the outer surface of the pole shoe 2 is a concave arc and is concentric with the stator.

[0024] The length of the pole body 1 is smaller than that of the pole shoe 2, and the length difference between the end of the pole body 1 and the corresponding end of the pole shoe 2 is 3-10 mm. This not only achieves the weight reduction of the magnetic pole, but also the copper wire wrapped around the pole body 1 is blocked and limited by the pole shoe 2 as a whole, making the structure of the copper wire winding more stable.

[0025] The body 1 is provided with a plurality of vertically arranged first weight-reducing holes 3 and second weight-reducing holes 4, and they are all oblong holes. Figure 3 As shown, one end of the first and second lightening holes 3 and 4 passes through the pole body 1, and the other end extends to the side of the pole shoe 2 connected to the pole body 1. The reason for this arrangement is that if the first and second lightening holes 3 and 4 pass through the pole shoe 2, magnetic flux leakage is likely to occur, resulting in an unstable magnetic field in the electrode.

[0026] Four first lightening holes 3 are provided, located near the four corners of the pole body 1, forming a rectangular shape. When the coil is wound around the pole body 1, the pressure exerted by the coil on the pole body 1 is primarily concentrated at four points on the pole body 1. Therefore, to improve the structural stability of the pole body 1, the lengthwise symmetry line of the first lightening holes 3 coincides with the line connecting the diagonal corners of the pole body 1.

[0027] There are also four second weight-reducing holes 4 , which are located close to the four sides of the body 1 and perpendicular to the sides of the body.

[0028] Because magnetic poles are typically made of high-hardness steel, thermal expansion and contraction can easily cause cracks in the lightening holes. Therefore, the following design is employed: a first copper sleeve 5 is embedded in the first lightening hole 3, and a second copper sleeve 6 is embedded in the second lightening hole 4. The copper sleeve's ductility improves the magnetic pole's toughness, protecting it from cracks. Furthermore, the copper sleeve provides improved heat dissipation, enhancing heat dissipation efficiency.

[0029] Because the magnetic poles and copper sleeves expand and contract at different rates, they are prone to separation. Therefore, the first copper sleeve 5 is welded to the inner wall of the first lightening hole 3, and the second copper sleeve 6 is welded to the inner wall of the second lightening hole 4. The welding process is as follows: Silver-based solder consisting of 45% silver, 25% copper, 20% zinc, and 10% cadmium is used. The welding steps are as follows: 1. Preheat the welding area to 150°C using a high-frequency induction heater for 3 minutes. This ensures a uniform temperature rise and avoids local overheating. 2. Spot weld using argon arc welding (ATW) with a welding current of 80A, a voltage of 12V, a welding speed of 5mm / s, and an argon gas flow rate of 8L / min. 3. Continuous welding is performed, with the electrode angle between the magnet and the copper tube at 75° and a diameter of 2mm. Ensure the weld is uniform and full, free of defects such as pores and slag inclusions. 4. After welding, grind the weld to make the surface smooth. The grinding head used for grinding should have a diameter of 5mm and a rotation speed of 2000r / min. The welding environment temperature should be maintained between 20℃ and 25℃, and the humidity should not exceed 60%.

[0030] The pole body 1 is a symmetrical quadrilateral with two long sides provided with outwardly protruding arc-shaped protrusions. This arrangement not only improves the strength of the magnetic pole, but also increases the volume of the pole body 1, thereby increasing the magnetic force and making the motor run more stable.

[0031] The beneficial effects of the present invention are: 1. The length setting of the pole body 1 not only achieves weight reduction, but also the copper wire wound on the pole body 1 is blocked and limited by the pole shoe 2 as a whole, making the structure of the copper wire winding more stable; 2. The setting of the first weight-reducing hole 3 and the second weight-reducing hole 4 effectively reduces the weight of the magnetic pole, thereby reducing the overall weight of the motor, which helps to improve the energy efficiency ratio and operating efficiency of the motor; the setting of the first weight-reducing hole 3 and the second weight-reducing hole 4 reduces the amount of material used, thereby reducing production costs and improving economic benefits; 3. Since the magnetic pole is fixedly connected, the first weight-reducing hole 3 and the second weight-reducing hole 4 will not affect the stability and strength of the motor stator, thereby reducing material waste and improving material utilization; 4. The setting of the first weight-reducing hole 3 and the second weight-reducing hole 4 increases the surface area of ​​the magnetic pole, which helps to improve the heat dissipation performance of the motor, reduce the temperature during motor operation, and extend the service life of the motor; 5. The weight-reduced magnetic pole will not affect the performance of the motor. On the contrary, the response speed and operating efficiency of the motor will be improved due to the weight reduction.

[0032] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A lightweight composite motor stator pole having a symmetrical structure, consisting of a pole body (1) and a pole shoe (2) connected to each other, characterized in that: The length of the pole body (1) is smaller than the length of the pole shoe (2); The pole body (1) is provided with a plurality of vertically arranged first weight-reducing holes (3) and second weight-reducing holes (4); A first copper sleeve (5) is embedded in the first weight-reducing hole (3); The second weight-reducing hole (4) is inlaid with a second copper sleeve (6).

2. A lightweight composite motor stator pole according to claim 1, characterized in that: One end of the first weight-reducing hole (3) and the second weight-reducing hole (4) both pass through the pole body (1), and the other end both extend to the side of the pole shoe (2) connected to the pole body (1).

3. The lightweight composite motor stator pole according to claim 2, characterized in that: The first weight-reducing hole (3) and the second weight-reducing hole (4) are oblong holes.

4. The lightweight composite motor stator pole according to claim 3, characterized in that: The symmetry line of the first weight-reducing hole (3) in the length direction coincides with the line connecting the diagonals of the pole body (1).

5. The lightweight composite motor stator pole according to claim 1, characterized in that: The first copper sleeve (5) is connected and fixed to the inner wall of the first weight-reducing hole (3) by welding; The second copper sleeve (6) is connected and fixed to the inner wall of the second weight-reducing hole (4) by welding.

6. The lightweight composite motor stator pole according to claim 1, characterized in that: Two long sides of the pole body (1) are provided with outward protrusions, and the protrusions are arc-shaped.

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