Permanent magnet synchronous motor

Abstract

The permanent magnet synchronous motor comprises a first end cover, a second end cover, a cylinder body, a stator, a rotor and a rotating shaft, the first end cover and the second end cover are arranged at the two ends of the cylinder body respectively, the stator is fixedly arranged in the cylinder body, the rotor is arranged on the rotating shaft, and the first end cover and the second end cover are arranged on the rotating shaft. The two ends of the rotating shaft are in running fit with the first end cover and the second end cover respectively, the rotor is located in the stator, the motor further comprises a controller and a protective cover, the protective cover is made of metal and arranged on one side of the first end cover, a protective cavity is formed between the protective cover and the first end cover, and the protective cavity is communicated with the controller. And the controller is arranged on the protective cover, the controller is located on the inner wall of the protective cover, the controller is located in the protective cavity, and heat dissipation reinforcing ribs are arranged on the outer wall of the protective cover.

Description

Technical Field

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

[0002] At present, fans are installed in tea gardens or pastures to adjust the temperature and humidity when needed. The most important component of the fan is the permanent magnet synchronous motor. Patent announcement document CN216490133U discloses a currently commonly used permanent magnet synchronous motor. This permanent magnet synchronous motor installs the driver (also known as the controller) closely on one side of the casing. This installation method can be roughly regarded as an integrated installation of the driver and the casing. Although this integrated installation method reduces the volume of the entire motor, it is not conducive to the heat dissipation of the driver. Utility Model Content

[0003] In view of the above problems, the utility model proposes a permanent magnet synchronous motor.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A permanent magnet synchronous motor comprises a first end cover, a second end cover, a cylinder, a stator, a rotor and a rotating shaft, wherein the first end cover and the second end cover are respectively arranged at the two ends of the cylinder, the stator is fixedly arranged in the cylinder, the rotor is arranged on the rotating shaft, the two ends of the rotating shaft are respectively rotatably matched with the first end cover and the second end cover, the rotor is located in the stator, and also comprises a controller and a protective cover, the protective cover is a protective cover made of metal material, the protective cover is arranged on one side of the first end cover, a protective cavity is formed between the protective cover and the first end cover, the controller is arranged on the protective cover, and the controller is located on the inner wall of the protective cover, the controller is located in the protective cavity, and heat dissipation reinforcement ribs are arranged on the outer wall of the protective cover.

[0006] This type of permanent magnet synchronous motor is mainly used in fans used in pastures or tea gardens. One end of the shaft is used to install the fan blades. After the fan blades are installed on the shaft, the fan blades and the protective cover are located at the two ends of the cylinder respectively. When the shaft drives the fan blades to rotate, a flowing airflow is formed at the outer wall of the cylinder and the protective cover. Since the controller is set on the inner wall of the protective cover, and the heat dissipation reinforcement ribs are set on the outer wall of the protective cover, the heat dissipation reinforcement ribs are used to strengthen the strength of the protective cover and increase the contact area with the airflow to accelerate the heat dissipation. Therefore, in this type of permanent magnet synchronous motor, after the fan blades are installed on the shaft, the controller located in the protective cover can also use the airflow formed by the fan blades to quickly dissipate heat.

[0007] In summary, in this type of permanent magnet synchronous motor, after the fan blades are installed on the rotating shaft, the controller located in the protective cover can also use the airflow formed by the fan blades to quickly dissipate heat.

[0008] Optionally, a hanging ring is provided on the outer wall of the cylinder.

[0009] Because this type of permanent magnet synchronous motor is mainly used in fans in pastures or tea gardens, it may need to be hoisted during installation. In order to facilitate hoisting, a hoisting ring is set on the outer wall of the cylinder.

[0010] Optionally, a first-shaped groove is provided on the stator, and the first-shaped groove is a T-shaped first-shaped groove.

[0011] The T-shaped first groove facilitates winding.

[0012] Optionally, a second groove is provided on the rotor, the second groove is a V-shaped second groove, and the sharp corner of the second groove faces the rotating shaft, and a magnet is arranged in the second groove.

[0013] The second type slot is a V-shaped second type slot, and the sharp corner of the second type slot faces the shaft, which can increase the AC and DC inductance difference and is conducive to expanding the constant power weak magnetic speed regulation area. Specifically, the shaft is fixed on the center hole of the rotor.

[0014] Optionally, a bell hole is provided on the rotor, the bell hole is located between two adjacent second grooves, and the bell hole is in a T-shaped fan shape.

[0015] The purpose of opening the bell hole is to reduce the weight of the entire rotor, which can reduce the rotational inertia of the entire rotor and thus reduce the mechanical constant time of the motor. At the same time, since the bell hole is located between two adjacent second-type slots, the magnetic conductive area can be maximized.

[0016] The beneficial effect of the utility model is that after the fan blades are installed on the rotating shaft, the controller located in the protective cover can also use the airflow formed by the fan blades to quickly dissipate heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of a permanent magnet synchronous motor;

[0018] Figure 2 It is a schematic diagram of the position of the controller in the protective cover;

[0019] Figure 3 It is a schematic diagram of the coordination relationship between the rotor and the stator;

[0020] Figure 4 It is a schematic diagram of the rotor structure.

[0021] The reference numerals in the figure are: 101, first end cover; 102, second end cover; 2, cylinder; 3, lifting ring; 4, rotating shaft; 5, protective cover; 501, heat dissipation reinforcement rib; 6, controller; 7, magnet; 8, stator; 801, first type groove; 9, rotor; 901, second type groove; 902, bell hole; 903, center hole. DETAILED DESCRIPTION

[0022] The utility model is described in detail below in conjunction with the accompanying drawings.

[0023] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a permanent magnet synchronous motor includes a first end cover 101, a second end cover 102, a cylinder 2, a stator 8, a rotor 9 and a rotating shaft 4, wherein the first end cover 101 and the second end cover 102 are respectively arranged at the two ends of the cylinder 2, the stator 8 is fixedly arranged in the cylinder 2, the rotor 9 is arranged on the rotating shaft 4, the two ends of the rotating shaft 4 are respectively rotatably matched with the first end cover 101 and the second end cover 102, the rotor 9 is located in the stator 8, and also includes a controller 6 and a protective cover 5, the protective cover 5 is a protective cover 5 made of metal material, the protective cover 5 is arranged on one side of the first end cover 101, a protective cavity is formed between the protective cover 5 and the first end cover 101, the controller 6 is arranged on the protective cover 5, and the controller 6 is located on the inner wall of the protective cover 5, the controller 6 is located in the protective cavity, and the outer wall of the protective cover 5 is provided with heat dissipation reinforcement ribs 501.

[0024] This type of permanent magnet synchronous motor is mainly used for fans used in pastures or tea gardens. One end of the rotating shaft 4 is used to install the fan blades. After the fan blades are installed on the rotating shaft 4, the fan blades and the protective cover 5 are respectively located at the two ends of the cylinder 2. When the rotating shaft 4 drives the fan blades to rotate, a flowing airflow is formed at the outer wall of the cylinder 2 and the protective cover 5. Since the controller 6 is provided on the inner wall of the protective cover 5, and the heat dissipation reinforcement ribs 501 are provided on the outer wall of the protective cover 5, the heat dissipation reinforcement ribs 501 are used to strengthen the strength of the protective cover 5 and to increase the contact area with the airflow to accelerate the heat dissipation. Therefore, in this type of permanent magnet synchronous motor, after the fan blades are installed on the rotating shaft 4, the controller 6 located in the protective cover 5 can also use the airflow formed by the fan blades to quickly dissipate heat. With the attached Figure 1 Taking the direction shown in as an example, after the fan blades are installed on the shaft, the fan blades are located on the far right side (i.e., the right side of the second end cover).

[0025] In summary, in this permanent magnet synchronous motor, after the fan blades are mounted on the rotating shaft 4, the controller 6 located in the protective cover 5 can also use the airflow formed by the fan blades to quickly dissipate heat.

[0026] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a hanging ring 3 is arranged on the outer wall of the cylinder 2.

[0027] Because this type of permanent magnet synchronous motor is mainly used in fans in pastures or tea gardens, it may need to be hoisted during installation. In order to facilitate hoisting, a hoisting ring 3 is provided on the outer wall of the cylinder 2.

[0028] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a first slot 801 is provided on the stator 8 , and the first slot 801 is a T-shaped first slot 801 .

[0029] The T-shaped first groove 801 facilitates winding.

[0030] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, the rotor 9 is provided with a second groove 901 , which is a V-shaped second groove 901 , and the sharp corner of the second groove 901 faces the shaft 4 , and a magnet 7 is disposed in the second groove 901 .

[0031] The second slot 901 is a V-shaped second slot 901, and the sharp corner of the second slot 901 faces the shaft 4, which can increase the AC and DC inductance difference and is conducive to expanding the constant power weak magnetic speed regulation area. Specifically, the shaft 4 is fixed on the central hole 903 of the rotor 9.

[0032] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 And attached Figure 4 As shown, a bell hole 902 is provided on the rotor 9. The bell hole 902 is located between two adjacent second grooves 901, and the bell hole 902 is in a T-shaped fan shape.

[0033] The purpose of opening the bell hole 902 is to reduce the weight of the entire rotor 9, thereby reducing the rotational inertia of the entire rotor 9 and thus reducing the mechanical constant time of the motor. At the same time, since the bell hole 902 is located between two adjacent second-type grooves 901, the magnetic conductive area can be maximized. The sealing level of this motor reaches IP66.

[0034] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, directly or indirectly used in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A permanent magnet synchronous motor, comprising a first end cover, a second end cover, a cylinder, a stator, a rotor and a rotating shaft, wherein the first end cover and the second end cover are respectively arranged at two ends of the cylinder, the stator is fixedly arranged in the cylinder, the rotor is arranged on the rotating shaft, the two ends of the rotating shaft are respectively rotatably matched with the first end cover and the second end cover, the rotor is located in the stator, and is characterized in that: It also includes a controller and a protective cover, wherein the protective cover is made of metal and is arranged on one side of the first end cover. A protective cavity is formed between the protective cover and the first end cover. The controller is arranged on the protective cover, and the controller is located on the inner wall of the protective cover. The controller is located in the protective cavity, and heat dissipation reinforcement ribs are arranged on the outer wall of the protective cover.

2. The permanent magnet synchronous motor according to claim 1, characterized in that: A hanging ring is arranged on the outer wall of the cylinder.

3. The permanent magnet synchronous motor according to claim 1, characterized in that: The stator is provided with a first-shaped slot, and the first-shaped slot is a T-shaped first-shaped slot.

4. The permanent magnet synchronous motor according to claim 1, characterized in that: The rotor is provided with a second groove, which is a V-shaped second groove with a sharp corner facing the rotating shaft, and a magnet is arranged in the second groove.

5. The permanent magnet synchronous motor according to claim 4, characterized in that: The rotor is provided with a bell-removing hole, the bell-removing hole is located between two adjacent second-shaped grooves, and the bell-removing hole is in a T-shaped fan shape.

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