High-efficiency heat-dissipation motor rotor lamination structure

Abstract

The utility model provides a kind of high-efficiency heat dissipation motor rotor punching piece structure, including rotor punching piece body, multiple magnetic steel grooves and magnetic steel heat dissipation structure that are sequentially provided on the rotor punching piece body and are evenly distributed along the circumferential direction of the rotor punching piece body, the magnetic steel heat dissipation structure includes the heat dissipation slot of two magnetic steel grooves side of location, the shape of the middle and both ends position of heat dissipation slot is inverted V type;The utility model has the following beneficial effects: the utility model designs the heat dissipation area of adjacent magnetic steel groove as a whole, and the middle and both ends position of heat dissipation slot are designed as inverted V type, to improve the heat dissipation area of rotor, and can effectively inhibit the noise and vibration generated when rotor is at high speed operation;The utility model in the magnetic steel groove is evenly arranged along the radial direction, and the center line of magnetic steel groove passes through the center dot of rotor punching piece, so that the outer diameter of rotor can be further reduced, and finally the size of product is reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a high-efficiency heat dissipation motor rotor lamination structure. Background Technology

[0002] The core component of an electric motor is the rotor, which is composed of multiple layers of stacked rotor laminations. Multiple magnet slots are formed on the rotor laminations to accommodate permanent magnets. To optimize the magnetic circuit distribution and suppress vibration, multiple slits are typically placed on one side of the magnet slots. However, in existing rotor lamination designs, these slits are independent of the magnet slots, leading to a significant increase in motor vibration and noise during high-speed operation, as well as heat concentration in the magnet area. This not only easily causes demagnetization of the permanent magnets but also reduces the overall reliability of the rotor. Existing rotor lamination magnet arrangements include tangential, V-shaped, U-shaped, and Halbach arrays. If these structures require more magnets, the rotor laminations need to be enlarged. This results in an increase in motor size and a corresponding increase in manufacturing costs. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a high-efficiency heat dissipation motor rotor lamination structure to solve the problem that in the existing rotor lamination design, because the slits and magnet slots are independent of each other, the motor vibration and noise will be significantly increased; the existing rotor lamination magnet arrangement methods can be divided into tangential, V-shaped, U-shaped and Halbach array. If these structures require more magnets, it will lead to the problem of increasing the size of the motor.

[0004] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0005] A high-efficiency heat dissipation motor rotor lamination structure includes a rotor lamination body and a shaft hole located at the center of the rotor lamination body. The rotor lamination body has a plurality of magnet slots evenly distributed along the circumference of the rotor lamination body, and two adjacent magnet slots in the plurality of magnet slots form a group. The rotor lamination body also has a plurality of magnet heat dissipation structures evenly distributed along the circumference of the rotor lamination body. The magnet heat dissipation structures are located between the magnet slots and the shaft hole. The magnet heat dissipation structures include heat dissipation slots located on the sides of two adjacent magnet slots in each group. The shape of the heat dissipation slots at the middle and both ends is inverted V-shaped.

[0006] In one embodiment of this utility model, the center lines of the plurality of magnet slots pass through the center point of the rotor lamination body; this design can effectively increase the number of magnets, allowing the outer diameter of the rotor to be further reduced, ultimately reducing the size of the product and thus enhancing the core competitiveness of the product.

[0007] In one embodiment of the present invention, the inverted V-shape in the middle of the heat dissipation slot extends between two adjacent magnetic slots, and the inverted V-shapes at both ends of the heat dissipation slot are located on the side of the two adjacent magnetic slots that are far away from each other.

[0008] In one embodiment of this utility model, the rotor lamination body is further provided with a plurality of guide post holes located between the magnet heat dissipation structure and the shaft hole and evenly distributed along the circumferential interval of the rotor lamination body; the guide post holes in this technical solution are used to improve the speed and accuracy of rotor lamination stacking.

[0009] In one embodiment of this utility model, the rotor lamination body is further provided with a plurality of weight-reducing slots located between the magnet heat dissipation structure and the shaft hole and evenly distributed along the circumferential interval of the rotor lamination body, and each weight-reducing slot is located between two guide post holes; the weight-reducing slots in this technical solution can effectively reduce the weight of the rotor and improve the dynamic response of the motor speed and torque.

[0010] In one embodiment of this utility model, a keyway integrally formed with the rotor lamination body is provided in the shaft hole, and a plurality of semicircular slots are also provided in the shaft hole, which are arranged symmetrically in the shaft hole along the center line of the keyway. The keyway in this technical solution can reduce the assembly process of the rotor, thereby reducing costs. The semicircular slots can effectively reduce the contact area between the iron core and the rotor shaft, thereby reducing the resistance during the assembly process and reducing the assembly time of the iron core and the shaft.

[0011] As described above, the high-efficiency heat dissipation motor rotor lamination structure of this utility model has the following beneficial effects:

[0012] 1. This utility model designs the heat dissipation area of ​​adjacent magnet slots as a whole, and designs the middle and both ends of the heat dissipation slot opening as an inverted V shape to increase the heat dissipation area of ​​the rotor and reduce the number of heat dissipation slot openings, thereby effectively suppressing the noise and vibration generated by the rotor when running at high speed.

[0013] The inverted V-shaped design of the heat dissipation slots not only increases the heat dissipation area of ​​the magnets but also effectively reduces the weight of the rotor and lowers the rotor's moment of inertia, thereby improving the response time of the motor's speed and torque. The rotor dissipates heat more evenly during high-speed operation, avoiding the risk of heat concentration that could lead to demagnetization of the permanent magnets. This also solves the problem of significantly increased motor vibration and noise caused by the slits and magnet slots being independent of each other.

[0014] 2. In this utility model, the magnet slots are evenly arranged radially, and the center line of the magnet slots passes through the center point of the rotor lamination. This design can effectively increase the number of magnets, allowing the outer diameter of the rotor to be further reduced, ultimately reducing the size of the product and thus enhancing the core competitiveness of the product. This solves the problem that existing rotor lamination magnet arrangement methods can be divided into tangential, V-shaped, U-shaped, and Halbach arrays. If these structures require more magnets, it will lead to an increase in the size of the motor. Attached Figure Description

[0015] Figure 1 The diagram shows the overall structure of the high-efficiency heat dissipation motor rotor lamination structure disclosed in the embodiment of this utility model.

[0016] Figure 2 The high-efficiency heat dissipation motor rotor lamination structure shown in the embodiments of this utility model is as follows. Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0017] Component designation explanation

[0018] 1. Rotor lamination body; 2. Shaft hole; 3. Magnet slot; 4. Magnet heat dissipation structure; 401. Heat dissipation slot; 5. Guide column hole; 6. Weight reduction slot; 7. Keyway; 8. Semicircular slot. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] This utility model relates to a high-efficiency heat dissipation motor rotor lamination structure, specifically as follows: Figure 1 and Figure 2 As shown, the device includes a rotor lamination body 1 and a shaft hole 2 located at the center of the rotor lamination body 1. The rotor lamination body 1 has a plurality of magnet slots 3 evenly distributed along the circumference of the rotor lamination body 1. The center lines of the plurality of magnet slots 3 pass through the center point of the rotor lamination body 1. Two adjacent magnet slots 3 form a group. It should be noted that the shape of the magnet slots 3 in this embodiment is square, and the magnet slots 3 are evenly arranged along the radial direction. The center lines of the magnet slots 3 pass through the center point of the rotor lamination body 1. This design can effectively increase the number of magnets, so that the outer diameter of the rotor can be further reduced, ultimately reducing the size of the product and thus improving the core competitiveness of the product.

[0021] The rotor lamination body 1 is also provided with a plurality of magnet heat dissipation structures 4 located between the magnet slots 3 and the shaft holes 2 and evenly distributed along the circumferential interval of the rotor lamination body 1. The magnet heat dissipation structure 4 includes heat dissipation slots 401 located on the sides of each pair of adjacent magnet slots 3. The shape of the middle and both ends of the heat dissipation slots 401 is inverted V-shaped. The middle inverted V-shape of the heat dissipation slots 401 extends to the space between the two adjacent magnet slots 3, and the inverted V-shapes at both ends of the heat dissipation slots 401 are located on the side of the two adjacent magnet slots 3 that are far away from each other. It should be noted that by connecting the adjacent magnet slots 3 The heat dissipation area is designed as a whole, with an inverted V-shape at the middle and both ends of the heat dissipation slot 401. This design increases the heat dissipation area of ​​the rotor and reduces the number of heat dissipation slots 401, effectively suppressing noise and vibration generated by the rotor during high-speed operation. The inverted V-shaped design of the heat dissipation slot 401 not only increases the heat dissipation area of ​​the magnets but also effectively reduces the weight of the rotor and lowers the rotor's moment of inertia, thereby improving the response time of the motor speed and torque. The rotor dissipates heat more evenly during high-speed operation, avoiding heat concentration and the risk of demagnetization of the permanent magnets.

[0022] The rotor lamination body 1 is also provided with a plurality of guide post holes 5 located between the magnet heat dissipation structure 4 and the shaft hole 2 and evenly distributed along the circumference of the rotor lamination body 1. It should be noted that in this embodiment, there are 5 guide post holes 5. The guide post holes 5 are used to improve the speed and accuracy of rotor lamination stacking. The rotor lamination body 1 is also provided with a plurality of weight reduction slots 6 located between the magnet heat dissipation structure 4 and the shaft hole 2 and evenly distributed along the circumference of the rotor lamination body 1. Each weight reduction slot 6 is located between two guide post holes 5. The number of weight reduction slots 6 is also 5. The design of the weight reduction slots 6 can effectively reduce the weight of the rotor and improve the dynamic response of the motor speed and torque.

[0023] The shaft hole 2 is provided with a keyway 7 integrally formed with the rotor lamination body 1. The shaft hole 2 is also provided with a plurality of semi-circular slots 8 distributed sequentially along the circumference of the shaft hole 2. The plurality of semi-circular slots 8 are symmetrically arranged in the shaft hole 2 along the center line of the keyway 7. It should be noted that the design of the keyway 7 can reduce the rotor assembly process and save parts (flat key), thereby reducing costs. The design of the semi-circular slots 8 can effectively reduce the contact area between the iron core and the rotor shaft, thereby reducing the resistance during the assembly process and reducing the assembly time of the iron core and the shaft.

[0024] Specifically, the design of the high-efficiency heat dissipation motor rotor lamination structure includes the following steps: First, the shaft hole 2 is designed at the center of the rotor lamination body 1. Simultaneously, a keyway 7 and a semi-circular slot 8 are designed within the shaft hole 2, with multiple semi-circular slots 8 symmetrically arranged within the shaft hole 2 along the centerline of the keyway 7. Then, multiple magnet slots 3 are designed at the furthest point from the shaft hole 2 on the rotor lamination body 1, with evenly distributed circumferential spacing along the rotor lamination body 1, and the centerline of the magnet slots 3 passes through the center point of the rotor lamination body 1. Next, the multiple magnet slots 3 are grouped in pairs, and a magnet heat dissipation structure 4 is designed at each pair of adjacent magnet slots 3, with the multiple magnet heat dissipation structures 4 evenly distributed circumferentially along the rotor lamination body 1. Finally, multiple guide post holes 5 and weight-reducing slots 6 are set between the magnet heat dissipation structure 4 and the shaft hole 2, with the multiple guide post holes 5 and weight-reducing slots 6 evenly distributed circumferentially along the rotor lamination body 1, thus completing the design of the high-efficiency heat dissipation motor rotor lamination structure.

[0025] In summary, 1. This utility model designs the heat dissipation area of ​​adjacent magnet slots 3 as a whole, and designs the middle and both ends of the heat dissipation slot 401 as an inverted V shape to increase the heat dissipation area of ​​the rotor and reduce the number of heat dissipation slots 401, thereby effectively suppressing the noise and vibration generated by the rotor when running at high speed.

[0026] The inverted V-shaped design of the heat dissipation slot 401 not only increases the heat dissipation area of ​​the magnet, but also effectively reduces the weight of the rotor and the moment of inertia of the rotor, thereby improving the response time of the motor speed and torque. The rotor dissipates heat more evenly during high-speed operation, avoiding the risk of heat concentration and demagnetization of permanent magnets. It also solves the problem that the motor vibration and noise will be significantly increased because the slit and the magnet slot 3 are independent of each other.

[0027] 2. In this utility model, the magnet slots 3 are evenly arranged radially, and the center line of the magnet slots 3 passes through the center point of the rotor lamination. This design can effectively increase the number of magnets, allowing the outer diameter of the rotor to be further reduced, ultimately reducing the size of the product and thus enhancing the core competitiveness of the product. This solves the problem that existing rotor lamination magnet arrangement methods can be divided into tangential, V-shaped, U-shaped, and Halbach arrays. If these structures require more magnets, it will lead to an increase in the size of the motor.

[0028] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit this utility model. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A high-efficiency heat-dissipation motor rotor lamination structure, comprising a rotor lamination body (1) and a shaft hole (2) arranged at the center position of the rotor lamination body (1), characterized in that: The rotor lamination body (1) is provided with a plurality of magnet slots (3) evenly distributed along the circumferential direction of the rotor lamination body (1), and two adjacent magnet slots (3) in the plurality of magnet slots (3) form a group; The rotor lamination body (1) is also provided with a plurality of magnet heat dissipation structures (4) evenly distributed along the circumference of the rotor lamination body (1). The magnet heat dissipation structure (4) is located between the magnet slot (3) and the shaft hole (2). The magnet heat dissipation structure (4) includes a heat dissipation slot (401) located on the side of each pair of adjacent magnet slots (3). The shape of the middle and both ends of the heat dissipation slot (401) is an inverted V shape.

2. The high efficient heat dissipating motor rotor lamination structure according to claim 1, characterized in that: The center lines of the plurality of magnetic slots (3) pass through the center point of the rotor lamination body (1).

3. The high efficient heat dissipating motor rotor lamination structure of claim 1, wherein: The inverted V-shape in the middle of the heat dissipation slot (401) extends between two adjacent magnetic steel slots (3), and the inverted V-shapes at both ends of the heat dissipation slot (401) are located on the side of the two adjacent magnetic steel slots (3) that are far away from each other.

4. The high efficient heat dissipating motor rotor lamination structure of claim 1, wherein: The rotor lamination body (1) is also provided with a plurality of guide post holes (5) located between the magnet heat dissipation structure (4) and the shaft hole (2) and evenly distributed along the circumferential spacing of the rotor lamination body (1).

5. The high efficient heat dissipating motor rotor lamination structure of claim 4, wherein: The rotor lamination body (1) is also provided with a plurality of weight-reducing slots (6) located between the magnet heat dissipation structure (4) and the shaft hole (2) and evenly distributed along the circumferential distance of the rotor lamination body (1). Each of the weight-reducing slots (6) is located between two guide post holes (5).

6. The high efficient heat dissipating motor rotor lamination structure of claim 1, wherein: The shaft hole (2) is provided with a keyway (7) integrally formed with the rotor lamination body (1). The shaft hole (2) is also provided with a plurality of semi-circular slots (8) distributed sequentially along the circumference of the shaft hole (2). The plurality of semi-circular slots (8) are symmetrically arranged in the shaft hole (2) along the center line of the keyway (7).

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