Rotor structure of permanent magnet synchronous motor

Abstract

The utility model relates to the technical field of motor rotors, in particular to a rotor structure of a permanent magnet synchronous motor, which comprises a rotating shaft, a rotor iron core is mounted on the outer surface of the rotating shaft, twelve heat dissipation devices are fixedly connected in the rotor iron core in a penetrating manner, and two heat dissipation devices form a group. Six permanent magnets are fixedly connected in the rotor core in a penetrating manner, the six permanent magnets are of T-shaped structures, the ends, close to each other, of the six permanent magnets are of conical structures, and the ends, away from each other, of the six permanent magnets are of cambered surface structures. According to the rotor structure of the permanent magnet synchronous motor, heat dissipation can be performed on the rotor iron core under the effect of the heat conduction column through the arranged heat dissipation device, the heat conduction column is provided with the plurality of secondary ventilation holes, and the plurality of secondary ventilation holes are communicated with the main ventilation hole, so that heat dissipation can be performed on the rotor iron core under the effect of the plurality of secondary ventilation holes. The heat conduction columns can be prevented from hindering air circulation between the rotor iron cores, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotors, in particular to a rotor structure of a permanent magnet synchronous motor. Background Art

[0002] A permanent magnet synchronous motor is a synchronous motor that uses permanent magnets as an excitation source. Compared with traditional induction motors, permanent magnet synchronous motors have higher efficiency, wider speed range, and better dynamic response. Since permanent magnet synchronous motors do not require external excitation, they have a simple structure and high power density. The rotor of a permanent magnet synchronous motor is usually made of permanent magnet material. There are at least the following disadvantages in the use of existing permanent magnet synchronous motor rotors: Most existing rotors have heat dissipation holes on the core to dissipate heat during use, but the heat dissipation efficiency is low only through the heat dissipation holes, which is not conducive to long-term heat dissipation. Therefore, we introduce a rotor structure for a permanent magnet synchronous motor. Utility Model Content

[0003] The main purpose of the utility model is to provide a rotor structure of a permanent magnet synchronous motor, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A rotor structure of a permanent magnet synchronous motor comprises a rotating shaft, a rotor core is mounted on the outer surface of the rotating shaft, twelve heat dissipation devices are inserted and fixedly connected in the rotor core, two of the twelve heat dissipation devices form a group, six permanent magnets are inserted and fixedly connected in the rotor core, the six permanent magnets are all of "T"-shaped structure, the ends of the six permanent magnets that are close to each other are all of conical structure, and the ends of the six permanent magnets that are away from each other are all of arc structure.

[0006] Preferably, the heat dissipation device comprises a main ventilation hole opened in a heat-conducting column, and a plurality of secondary ventilation holes are opened on the outer surface of the heat-conducting column, and the plurality of secondary ventilation holes are all connected to the main ventilation hole.

[0007] Preferably, the six permanent magnets are distributed in a ring shape with equal distances, and the six groups of heat dissipation devices are distributed in a ring shape with equal distances.

[0008] Preferably, the six groups of heat dissipation devices and the six permanent magnets are distributed alternately.

[0009] Preferably, a plurality of support frames are fixedly connected to the inner wall of the main ventilation hole.

[0010] Preferably, the plurality of support frames are all triangular structures.

[0011] Preferably, an axial hole is opened in the middle of the right end of the rotor core, and six T-slots and twelve heat dissipation holes are opened on the outside of the right end of the rotor core. The twelve heat dissipation holes are grouped into two, and the six groups of heat dissipation holes and the six T-slots are staggered. The six T-slots are interlaced and fixedly connected with the six permanent magnets, and the heat dissipation holes are interlaced and fixedly connected with the heat-conducting columns.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] By arranging a heat dissipation device, the heat-conducting column and the heat-dissipating holes on the rotor core are interlaced and fixed together, so that the heat-conducting column is located between multiple rotor cores, and the heat-conducting column connects several rotor cores together. Under the action of the heat-conducting column, the rotor core can be cooled. Since several secondary ventilation holes are opened on the heat-conducting column, and several secondary ventilation holes are connected to the main ventilation holes, under the action of several secondary ventilation holes, the heat-conducting column can be prevented from hindering the air circulation between the rotor cores, thereby improving the heat dissipation efficiency. By fixing several support frames on the inner wall of the heat-conducting column, and the several support frames are all triangular structures, the inner wall of the heat-conducting column can be supported, deformation of the heat-conducting column can be avoided, and the strength of the heat-conducting column can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of a rotor structure of a permanent magnet synchronous motor of the utility model;

[0015] Figure 2 It is a schematic diagram of the overall structure of a rotor core of a rotor structure of a permanent magnet synchronous motor of the utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of a heat dissipation device for a rotor structure of a permanent magnet synchronous motor according to the utility model;

[0017] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a heat-conducting column of a rotor structure of a permanent magnet synchronous motor.

[0018] In the figure: 1, rotating shaft; 2, rotor core; 3, permanent magnet; 4, heat dissipation device; 21, T-slot; 22, heat dissipation hole; 23, shaft hole; 41, heat-conducting column; 42, main ventilation hole; 43, secondary ventilation hole; 421, support frame. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A rotor structure of a permanent magnet synchronous motor includes a rotating shaft 1, a rotor core 2 is mounted on the outer surface of the rotating shaft 1, twelve heat dissipation devices 4 are inserted and fixedly connected in the rotor core 2, two of the twelve heat dissipation devices 4 form a group, six permanent magnets 3 are inserted and fixedly connected in the rotor core 2, the six permanent magnets 3 are all "T"-shaped structures, the ends of the six permanent magnets 3 that are close to each other are all conical structures, and the ends of the six permanent magnets 3 that are away from each other are all arc structures.

[0024] In this embodiment, the heat dissipation device 4 includes a main ventilation hole 42 opened in a heat-conducting column 41, and a plurality of secondary ventilation holes 43 opened on the outer surface of the heat-conducting column 41, and the plurality of secondary ventilation holes 43 are all connected to the main ventilation hole 42; six permanent magnets 3 are equidistantly distributed in a ring, and six groups of heat dissipation devices 4 are equidistantly distributed in a ring; the six groups of heat dissipation devices 4 and the six permanent magnets 3 are staggered; a plurality of support frames 421 are fixedly connected to the inner wall of the main ventilation hole 42; the plurality of support frames 421 are all triangular structures.

[0025] In this embodiment, an axial hole 23 is opened in the middle of the right end of the rotor core 2, and six T-slots 21 and twelve heat dissipation holes 22 are opened on the outside of the right end of the rotor core 2. The twelve heat dissipation holes 22 form a group of two, and the six groups of heat dissipation holes 22 and the six T-slots 21 are alternately distributed. The six T-slots 21 are interlaced and fixedly connected with the six permanent magnets 3, and the heat dissipation holes 22 are interlaced and fixedly connected with the heat-conducting columns 41.

[0026] It should be noted that the utility model is a rotor structure of a permanent magnet synchronous motor. During use, the heat-conducting column 41 is inserted into and fixed in the heat dissipation hole 22 on the rotor core 2. The heat-conducting column 41 is located between multiple rotor cores 2 and is connected to several rotor cores 2 together. Since the heat-conducting column 41 is in direct contact with the rotor core 2, it can effectively conduct the heat generated on the rotor core 2, thereby reducing its temperature and improving working efficiency and life. Since a number of secondary ventilation holes 43 are opened on the heat-conducting column 41, these secondary ventilation holes 43 are connected to the main ventilation holes 42. Firstly, the heat dissipation area is increased, so that the heat can be taken away by the air more quickly; secondly, it ensures that the air circulation between the rotor cores 2 will not be completely blocked by the heat-conducting column 41, thereby ensuring the heat dissipation efficiency. A number of support frames 421 are fixedly connected to the inner wall of the heat-conducting column 41, and the support frames 421 are all triangular structures. Because the triangle is one of the most stable geometric shapes, it can effectively withstand forces from all directions, thereby maintaining the shape of the heat-conducting column 41 stable and enhancing its overall reliability and durability.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A rotor structure of a permanent magnet synchronous motor, comprising a rotating shaft (1), characterized in that: A rotor core (2) is mounted on the outer surface of the rotating shaft (1), twelve heat sinks (4) are inserted and fixedly connected in the rotor core (2), two of the twelve heat sinks (4) form a group, six permanent magnets (3) are inserted and fixedly connected in the rotor core (2), the six permanent magnets (3) are all of a "T"-shaped structure, the ends of the six permanent magnets (3) that are close to each other are all of a conical structure, and the ends of the six permanent magnets (3) that are away from each other are all of a curved surface structure; The heat dissipation device (4) comprises a heat-conducting column (41) with a main ventilation hole (42) opened therein, and a plurality of secondary ventilation holes (43) opened on the outer surface of the heat-conducting column (41), and the plurality of secondary ventilation holes (43) are all in communication with the main ventilation hole (42).

2. The rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that: The six permanent magnets (3) are distributed in a ring shape at equal distances, and the six groups of heat dissipation devices (4) are distributed in a ring shape at equal distances.

3. The rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that: The six groups of heat dissipation devices (4) and the six permanent magnets (3) are distributed alternately.

4. The rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that: A plurality of support frames (421) are fixedly connected to the inner wall of the main ventilation hole (42).

5. The rotor structure of a permanent magnet synchronous motor according to claim 4, characterized in that: The plurality of support frames (421) are all triangular structures.

6. The rotor structure of a permanent magnet synchronous motor according to claim 1, characterized in that: An axial hole (23) is formed in the middle of the right end of the rotor core (2), and six T-shaped slots (21) and twelve heat dissipation holes (22) are formed on the outside of the right end of the rotor core (2), two of the twelve heat dissipation holes (22) form a group, and six groups of heat dissipation holes (22) and six T-shaped slots (21) are distributed alternately, the six T-shaped slots (21) are interlaced and fixedly connected to the six permanent magnets (3), and the heat dissipation holes (22) are interlaced and fixedly connected to the heat conducting columns (41).

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