Non-uniform air gap v-shaped built-in permanent magnet synchronous motor

Abstract

The utility model relates to the field of motors, and discloses a non-uniform air gap v-shaped built-in permanent magnet synchronous motor, which comprises a stator, a plurality of winding grooves are annularly arranged on the upper end face of the stator, detachable connection structures are arranged on the upper end face and the lower end face of the stator, a rotor is arranged on the inner side of the stator, and a rotor is arranged on the inner side of the stator. And non-uniform air gap structures are annularly arranged on the upper end surface of the rotor. According to the utility model, the stator and the rotor are detachably connected through the connecting block, the bolt and the rotating block, so that the internal parts of the motor can be conveniently checked, maintained and replaced, the maintenance cost is reduced, the connection and separation of the stator and the rotor can be quickly realized, and the assembly and maintenance efficiency is improved; through the non-uniform air gap structure of the plurality of first V-shaped grooves and the plurality of second V-shaped grooves, the structure can optimize the magnetic field distribution in the motor, reduce the torque pulsation during the operation of the motor, enable the output of the motor to be more stable, and improve the performance of the motor.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a permanent magnet synchronous motor with a non-uniform V-shaped built-in air gap. Background Art

[0002] The non-uniform air gap V-type interior permanent magnet synchronous motor (IPMSM) is a specially designed motor that combines the high efficiency and compact structure of the permanent magnet synchronous motor (PMSM) with the specific performance advantages brought by the non-uniform air gap design. This motor has a wide range of applications in electric vehicles, wind power generation, aerospace and industrial drives.

[0003] In the existing non-uniform air gap V-shaped built-in permanent magnet synchronous motor, since the stator and rotor are usually fixed by welding or permanent connection, although high-integration application scenarios such as electric vehicle motors have low requirements for disassembly, in laboratory research, small batch production, customized manufacturing or specific maintenance scenarios, this makes disassembly and maintenance complicated and time-consuming. Therefore, those skilled in the art provide a non-uniform air gap V-shaped built-in permanent magnet synchronous motor to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the present utility model is to solve the shortcomings existing in the prior art, and a non-uniform air gap V-shaped built-in permanent magnet synchronous motor is proposed, in which the stator and rotor are detachably connected through connecting blocks, bolts and rotating blocks. This design facilitates the inspection, maintenance and replacement of internal components of the motor, reduces maintenance costs, can quickly connect and separate the stator and rotor, and improves the efficiency of assembly and maintenance. Through the non-uniform air gap structure of multiple first V-grooves and multiple second V-grooves, this structure can optimize the magnetic field distribution inside the motor, reduce the torque pulsation during motor operation, make the motor output more stable, and improve the performance of the motor. Through the protective structure of the elastic layer and the plastic material protective layer, the elastic layer can absorb and buffer vibration impact, and the protective layer blocks the invasion of external foreign matter and prevents damage to internal components, which helps to improve the operating stability of the rotor and ensure the normal operation of the motor.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a non-uniform air gap V-shaped built-in permanent magnet synchronous motor, comprising a stator, wherein the upper end surface of the stator is provided with a plurality of winding slots arranged in an annular manner, and the upper and lower end surfaces of the stator are both provided with a detachable connection structure, a rotor is provided on the inner side of the stator, the upper end surface of the rotor is provided with a non-uniform air gap structure arranged in an annular manner, the inner side wall of the rotor is provided with a protective structure, and the upper end surface of the rotor is provided with a plurality of through holes arranged in an annular manner;

[0006] Through the above technical solution, the stator and the rotor are detachably connected through the connecting blocks, bolts and rotating blocks. This design facilitates the inspection, maintenance and replacement of the internal components of the motor, reduces maintenance costs, can quickly realize the connection and separation of the stator and the rotor, and improves the efficiency of assembly and maintenance. Through the non-uniform air gap structure of multiple first V-grooves and multiple second V-grooves, this structure can optimize the magnetic field distribution inside the motor, reduce the torque pulsation during the operation of the motor, make the motor output more stable, and improve the performance of the motor. Through the protective structure of the elastic layer and the plastic material protective layer, the elastic layer can absorb and buffer vibration impact, and the protective layer blocks the invasion of foreign matter and prevents damage to internal components, which helps to improve the operating stability of the rotor and ensure the normal operation of the motor.

[0007] Furthermore, the two disassembly connection structures include two connection blocks, four bolts and four rotating blocks. The two connection blocks are respectively arranged at the center of the two winding slots near the center. The four bolts are respectively arranged at the two sides of the center of the upper end surface and the lower end surface of the stator. The four rotating blocks are respectively threadedly sleeved on the upper center of the outer side walls of the four bolts. One side wall of the two connection blocks is fixedly connected to the center of the two side walls of the rotor.

[0008] Through the above technical solution, when the stator and rotor need to be connected, the connecting block is placed in the winding slot, and then the rotating block is rotated to move it downward along the bolt to tighten the stator and rotor. Conversely, the rotating block can be rotated in the opposite direction to achieve disassembly, which facilitates the inspection, maintenance and replacement of the internal components of the motor, reduces maintenance costs, can quickly achieve the connection and separation of the stator and rotor, and improves the efficiency of assembly and maintenance.

[0009] Furthermore, the non-uniform air gap structure includes a plurality of first V-shaped grooves and a plurality of second V-shaped grooves, wherein the plurality of first V-shaped grooves are arranged in an annular manner on the upper end surface of the rotor, and the plurality of second V-shaped grooves are arranged in an annular manner on the upper end surface of the rotor;

[0010] Through the above technical solution, when the motor is running, the magnetic field passes through the first V-shaped groove and the second V-shaped groove, and the distribution of the magnetic lines of force generated will also change accordingly. The first V-shaped groove and the second V-shaped groove can optimize the magnetic field distribution inside the motor, making it more in line with the needs of motor operation and improving the performance of the motor. The first V-shaped groove and the second V-shaped groove can effectively reduce the torque pulsation during motor operation and make the motor output more stable.

[0011] Furthermore, the protective structure includes an elastic layer and a protective layer, the elastic layer is sleeved on the inner side wall of the rotor, and the protective layer is sleeved on the inner side wall of the elastic layer;

[0012] Through the above technical solution, when the motor is running, the rotor will vibrate and be impacted by the outside world. The elastic layer can absorb and cushion these vibrations and impacts due to its elasticity, reducing the impact on the internal structure of the rotor. The protective layer directly blocks the invasion of foreign matter from the outside and prevents damage to internal components. By reducing vibration and providing protection, the protective structure helps to improve the operating stability of the rotor and ensure the normal operation of the motor.

[0013] Furthermore, the protective layer is made of plastic;

[0014] Through the above technical solution, the protective layer of plastic material has a certain hardness and toughness, and can fit tightly on the inside of the elastic layer to form a physical barrier. The plastic has good chemical stability and is not easily corroded, and can effectively prevent external moisture, dust and other possible harmful substances from entering the interior.

[0015] Furthermore, a plurality of grooves are arranged in a circular pattern at the center of the outer side wall of the stator;

[0016] The above technical solution helps to optimize the airflow distribution around the stator when the motor is running, or is used to install and fix related components, such as heat sinks, sensors, etc.

[0017] Furthermore, the two connecting blocks are respectively adapted to fit between the two winding slots;

[0018] Through the above technical solution, when the stator and the rotor are connected, the two connecting blocks can be accurately embedded in the corresponding two winding slots to achieve precise positioning and matching.

[0019] The utility model has the following beneficial effects:

[0020] 1. In the utility model, the permanent magnet synchronous motor with a non-uniform air gap V-shaped built-in is detachably connected through the stator and the rotor through connecting blocks, bolts and rotating blocks. This design facilitates the inspection, maintenance and replacement of the internal components of the motor, reduces maintenance costs, can quickly connect and separate the stator and the rotor, and improves the efficiency of assembly and maintenance.

[0021] 2. In the present invention, the non-uniform air gap structure of multiple first V-grooves and multiple second V-grooves can optimize the magnetic field distribution inside the motor, reduce torque pulsation during motor operation, make the motor output more stable, and improve the performance of the motor.

[0022] 3. In the present invention, the protective structure of the elastic layer and the plastic protective layer is such that the elastic layer can absorb and buffer vibration impacts, and the protective layer blocks the invasion of foreign matter and prevents damage to internal components, thereby helping to improve the operating stability of the rotor and ensure the normal operation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a permanent magnet synchronous motor with a non-uniform air gap V-shaped internal structure proposed by the present invention;

[0024] Figure 2 This is a three-dimensional cross-sectional view of a permanent magnet synchronous motor with a non-uniform air gap V-shaped internal structure proposed by the present invention;

[0025] Figure 3 This is a top sectional view of a permanent magnet synchronous motor with a non-uniform air gap V-shaped internal structure proposed by the present invention;

[0026] Figure 4 This is a side sectional view of a permanent magnet synchronous motor with a non-uniform air gap and a V-shaped internal structure proposed by the present invention.

[0027] Legend:

[0028] 1. Stator; 2. Rotor; 3. Groove; 4. Winding slot; 5. Disassembly connection structure; 501. Connection block; 502. Bolt; 503. Rotating block; 6. Non-uniform air gap structure; 601. First V-shaped groove; 602. Second V-shaped groove; 7. Through hole; 8. Protective structure; 801. Elastic layer; 802. Protective layer. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1-4The utility model provides an embodiment: a non-uniform air gap V-shaped built-in permanent magnet synchronous motor, comprising a stator 1, a plurality of winding slots 4 arranged in an annular manner on the upper end surface of the stator 1, a disassembly connection structure 5 provided on both the upper and lower end surfaces of the stator 1, a rotor 2 provided inside the stator 1, a non-uniform air gap structure 6 arranged in an annular manner on the upper end surface of the rotor 2, a protective structure 8 provided on the inner wall of the rotor 2, a plurality of through holes 7 arranged in an annular manner on the upper end surface of the rotor 2, a plurality of winding slots 4 on the stator 1 for winding coils, a rotating magnetic field generated after power is applied, and the permanent magnets in the rotor 2 rotate in the rotation generated by the stator 1 It rotates under the action of the magnetic field and is driven by magnetic force. The non-uniform air gap structure 6 makes the air gap unevenly distributed around the rotor 2, thereby affecting the magnetic field distribution and optimizing the motor performance. The protective structure 8 provides protection for the inner side of the rotor 2 to prevent internal damage. The multiple through holes 7 help to reduce the weight of the rotor 2 and play a certain role in heat dissipation. The disassembly connection structure 5 facilitates the disassembly and maintenance of the stator 1. A plurality of grooves 3 are arranged in a ring at the center of the outer wall of the stator 1. When the motor is running, it helps to optimize the airflow distribution around the stator 1, or is used to install and fix related components, such as heat sinks, sensors, etc.

[0031] The two disassembly connection structures 5 include two connection blocks 501, four bolts 502 and four rotating blocks 503. The two connection blocks 501 are respectively arranged at the center of the two winding slots 4 near the center. The four bolts 502 are respectively arranged at the sides of the center of the upper end face and the lower end face of the stator 1. The four rotating blocks 503 are respectively threadedly sleeved on the upper center of the outer wall of the four bolts 502. One side wall of the two connection blocks 501 is fixedly connected to the center of the two side walls of the rotor 2. When it is necessary to connect the stator 1 and the rotor 2, the connection block 501 is placed in the winding slot 4, and then rotated. The rotating block 503 is rotated to move downward along the bolt 502, thereby tightening the stator 1 and the rotor 2. Conversely, the rotating block 503 can be rotated in the opposite direction to achieve disassembly, which is convenient for inspection, repair and replacement of internal components of the motor, reduces maintenance costs, can quickly achieve connection and separation of the stator 1 and the rotor 2, and improves the efficiency of assembly and maintenance. The two connecting blocks 501 are respectively adapted to the two winding slots 4. When the stator 1 and the rotor 2 are connected, the two connecting blocks 501 can be accurately embedded in the corresponding two winding slots 4 to achieve precise positioning and matching.

[0032] The non-uniform air gap structure 6 includes a plurality of first V-grooves 601 and a plurality of second V-grooves 602. The plurality of first V-grooves 601 are arranged in a ring shape on the upper end surface of the rotor 2, and the plurality of second V-grooves 602 are arranged in a ring shape on the upper end surface of the rotor 2. When the motor is running, the magnetic field passes through the first V-grooves 601 and the second V-grooves 602, and the distribution of magnetic lines of force generated will also change accordingly. The first V-grooves 601 and the second V-grooves 602 can optimize the magnetic field distribution inside the motor, making it more in line with the requirements of the motor operation and improving the performance of the motor. The first V-grooves 601 and the second V-grooves 602 can effectively reduce the torque pulsation during the operation of the motor and make the motor output more stable.

[0033] The protective structure 8 includes an elastic layer 801 and a protective layer 802. The elastic layer 801 is sleeved on the inner wall of the rotor 2, and the protective layer 802 is sleeved on the inner wall of the elastic layer 801. When the motor is running, the rotor 2 will vibrate and be impacted by the outside world. The elastic layer 801 can absorb and buffer these vibrations and impacts by virtue of its elasticity, reducing the impact on the internal structure of the rotor 2. The protective layer 802 directly blocks the invasion of foreign matter from the outside and prevents damage to internal components. By reducing vibration and providing protection, the protective structure 8 helps to improve the operating stability of the rotor 2 and ensure the normal operation of the motor. The protective layer 802 is made of plastic. The protective layer 802 made of plastic has a certain hardness and toughness, and can fit tightly on the inside of the elastic layer 801 to form a physical barrier. The plastic has good chemical stability and is not easily corroded. It can effectively prevent external moisture, dust and other possible harmful substances from entering the interior.

[0034] Working principle: Multiple winding slots 4 on the stator 1 are used to wind the coils, and a rotating magnetic field is generated after power is applied. The permanent magnets in the rotor 2 are driven by magnetic force and rotate under the action of the rotating magnetic field generated by the stator 1. The magnetic field passes through the first V-shaped slot 601 and the second V-shaped slot 602, and the distribution of magnetic lines of force generated will also change accordingly. The first V-shaped slot 601 and the second V-shaped slot 602 can optimize the magnetic field distribution inside the motor, making it more in line with the needs of motor operation and improving the performance of the motor. The first V-shaped slot 601 and the second V-shaped slot 602 can effectively reduce the torque pulsation during motor operation and make the motor output more stable. The rotor 2 will vibrate and be impacted by the outside world. The elastic layer 801 can absorb and buffer these vibrations and impacts with its elasticity, reducing the impact on the inside of the rotor 2. The protective layer 802 directly blocks the invasion of foreign matter and prevents damage to internal components by reducing vibration and providing protection. The protective structure 8 helps to improve the operating stability of the rotor 2 and ensure the normal operation of the motor. The multiple through holes 7 help to reduce the weight of the rotor 2 and play a certain role in heat dissipation. When the stator 1 and the rotor 2 need to be connected, the connecting block 501 is placed in the winding slot 4, and then the rotating block 503 is rotated to move it downward along the bolt 502, thereby tightening the stator 1 and the rotor 2. Conversely, the rotating block 503 can be rotated in the opposite direction to achieve disassembly, which is convenient for inspection, maintenance and replacement of the internal components of the motor, reducing maintenance costs, and can quickly achieve connection and separation of the stator 1 and the rotor 2, thereby improving the efficiency of assembly and maintenance.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A permanent magnet synchronous motor with a non-uniform air gap V-shaped internal structure, comprising a stator (1), characterized in that: The upper end surface of the stator (1) is provided with a plurality of winding slots (4) arranged in an annular manner, and both the upper end surface and the lower end surface of the stator (1) are provided with a disassembly connection structure (5). A rotor (2) is provided on the inner side of the stator (1), and the upper end surface of the rotor (2) is provided with a non-uniform air gap structure (6) arranged in an annular manner. A protective structure (8) is provided on the inner wall of the rotor (2), and the upper end surface of the rotor (2) is provided with a plurality of through holes (7) arranged in an annular manner.

2. The V-shaped permanent magnet synchronous motor with non-uniform air gap according to claim 1, characterized in that: The two disassembly connection structures (5) include two connection blocks (501), four bolts (502) and four rotating blocks (503). The two connection blocks (501) are respectively arranged at the inner center of two winding slots (4) near the center. The four bolts (502) are respectively arranged at the centers of the upper end face and the lower end face of the stator (1) near both sides. The four rotating blocks (503) are respectively threadedly sleeved on the upper center of the outer side walls of the four bolts (502). One side wall of the two connection blocks (501) is fixedly connected to the center of the two side walls of the rotor (2).

3. The V-shaped permanent magnet synchronous motor with non-uniform air gap according to claim 1, characterized in that: The non-uniform air gap structure (6) comprises a plurality of first V-shaped grooves (601) and a plurality of second V-shaped grooves (602), wherein the plurality of first V-shaped grooves (601) are arranged in an annular manner on the upper end surface of the rotor (2), and the plurality of second V-shaped grooves (602) are arranged in an annular manner on the upper end surface of the rotor (2).

4. The V-shaped permanent magnet synchronous motor with non-uniform air gap according to claim 1, characterized in that: The protective structure (8) comprises an elastic layer (801) and a protective layer (802), wherein the elastic layer (801) is sleeved on the inner wall of the rotor (2), and the protective layer (802) is sleeved on the inner wall of the elastic layer (801).

5. The V-shaped permanent magnet synchronous motor with non-uniform air gap according to claim 4, characterized in that: The material of the protective layer (802) is plastic.

6. The V-shaped permanent magnet synchronous motor with non-uniform air gap according to claim 1, characterized in that: A plurality of grooves (3) are arranged in an annular pattern at the center of the outer side wall of the stator (1).

7. The V-shaped permanent magnet synchronous motor with non-uniform air gap according to claim 2, characterized in that: The two connecting blocks (501) are respectively adapted to the two winding slots (4).

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