Heat dissipation structure of disc type permanent magnet synchronous motor and disc type permanent magnet synchronous motor

Abstract

The utility model relates to the technical field of disc type motors, in particular to a heat dissipation structure of a disc type permanent magnet synchronous motor and the disc type permanent magnet synchronous motor. The disc type permanent magnet synchronous motor comprises a motor shell, a motor rotating shaft, a rotor and two stators, wherein the rotor and the two stators are arranged in the motor shell, and the rotor is located between the two stators, connected with the motor rotating shaft and driven by the motor rotating shaft to rotate; the heat dissipation structure is located between the two stators and comprises a fan and a heat dissipation structure shell. The heat dissipation structure shell is detachably connected with the motor shell and is provided with a cavity for accommodating the fan; the motor rotating shaft extends into the heat dissipation structure shell; the fan is located in the cavity of the heat dissipation structure shell, detachably connected with the motor rotating shaft and driven by the motor rotating shaft to rotate. The air volume and the heat dissipation efficiency are improved, the structure is simple, and the occupied size is small.

Description

Technical Field

[0001] The utility model relates to the technical field of disc motors, in particular to a heat dissipation structure of a disc permanent magnet synchronous motor and a disc permanent magnet synchronous motor. Background Technique

[0002] Disc motors, especially disc permanent magnet synchronous motors (Disc PMSM), are a kind of high-efficiency and compact motor technology, which are widely used in various high-performance drive systems. Its working principle is based on electromagnetic induction and the constant magnetic field generated by permanent magnets. The disc motor is an efficient electric drive solution, known for its compact size, high torque density and excellent control performance. The design of this kind of motor adopts a flat disc-shaped structure, making it particularly suitable for applications with limited space. Compared with traditional cylindrical motors, disc motors have significant advantages in terms of volume and weight, and can provide the same or even higher power output.

[0003] The structure of a traditional disc motor includes: a motor housing, a motor shaft, a flat rotor 5 and a pair of stator 6 with multi-phase windings. The rotor 5 and the stator 6 are both placed inside the motor housing, and the rotor 5 is driven to rotate by the motor shaft. The rotor 5 is usually composed of high-performance permanent magnetic materials, such as neodymium iron boron or samarium cobalt, which can provide a strong magnetic field. The stator 6 is composed of a core laminated with silicon steel sheets and windings. Alternating current is passed through the windings to generate a rotating magnetic field. When the stator 6 windings are connected to an alternating current power supply, the change of current will generate a rotating magnetic field around the stator 6. This rotating magnetic field interacts with the permanent magnet magnetic field on the rotor 5. According to the principle of electromagnetic induction, a torque is generated on the rotor 5 to push the rotor 5 to rotate. The "synchronous" characteristic of the disc permanent magnet synchronous motor means that the rotation speed of the rotor 5 is consistent with the synchronous speed of the rotating magnetic field generated by the stator 6. This synchronism is achieved by precisely controlling the current phase and magnitude in the stator 6 windings.

[0004] The advantages of disc motors lie in their high efficiency and high power density, which makes them very suitable for fields such as electric vehicles, industrial automation, aerospace and medical equipment. Their high efficiency reduces energy consumption, and the compact design allows them to provide the required power in a limited space.

[0005] Due to the compact structural design of the disc motor, the internal space is limited, resulting in lower heat dissipation efficiency than traditional motors. Due to the special structure of the disc motor, it is very difficult to cool and dissipate heat inside the motor, especially the rotor 5, which may cause the temperature of the permanent magnet to be too high, the performance to drop sharply, and even cause the permanent magnet to lose magnetism permanently. In some designs, an external blower is used for forced ventilation and heat dissipation. Although it can solve the problem of small volume and inability to dissipate heat on the surface, this design may increase the structural complexity of the motor, affect the protection level of the motor and the difficulty of commercial application. Summary of the Invention

[0006] The purpose of the present utility model is to overcome the problem of difficult heat dissipation of the existing disc-type permanent magnet synchronous motor, so as to provide a heat dissipation structure for a disc-type permanent magnet synchronous motor and a disc-type permanent magnet synchronous motor. The fan of the heat dissipation structure uses the movement of the rotor for air extraction and heat dissipation work, improves the performance of the rotor generator, enables it to reduce the total power required under the same input power, and improves its output efficiency at the same time.

[0007] To solve the above technical problems, the heat dissipation structure of the disc-type permanent magnet synchronous motor provided by the technical solution of the present utility model, the disc-type permanent magnet synchronous motor includes: a motor housing, a motor shaft, a rotor and two stators; wherein, the rotor and the two stators are both placed inside the motor housing, the rotor is located between the two stators and is connected to the motor shaft, and is driven to rotate by the motor shaft;

[0008] The heat dissipation structure is located between the two stators and includes: a fan and a heat dissipation structure housing;

[0009] The heat dissipation structure housing is detachably connected to the motor housing and has a cavity for accommodating the fan;

[0010] The motor shaft extends into the heat dissipation structure housing;

[0011] The fan is located in the cavity of the heat dissipation structure housing and is detachably connected to the motor shaft, and is driven to rotate by the motor shaft.

[0012] As an improvement of the above structure, the fan includes: a shaft connection part and a plurality of blades; wherein,

[0013] The shaft connection part is used for detachably connecting to the motor shaft; a plurality of the blades are connected to the shaft connection part and are uniformly arranged along the circumferential direction of the shaft connection part.

[0014] As an improvement of the above structure, a plurality of the blades are integrally formed with the shaft connection part.

[0015] As an improvement of the above structure, a plurality of the blades include: 6 to 9 blades.

[0016] As an improvement of the above structure, the blades are streamlined.

[0017] As an improvement of the above structure, the material of the blades includes: carbon fiber.

[0018] As an improvement of the above structure, the material of the heat dissipation structure housing includes: aluminum alloy.

[0019] As an improvement to the above structure, the housing of the heat dissipation structure includes: the first part of the housing of the heat dissipation structure, the second part of the housing of the heat dissipation structure, and the housing connection part; wherein, the first part of the housing of the heat dissipation structure and the second part of the housing of the heat dissipation structure are arranged oppositely and are detachably connected through the housing connection part; a cavity for accommodating a fan is formed between the first part of the housing of the heat dissipation structure and the second part of the housing of the heat dissipation structure.

[0020] As an improvement to the above structure, the housing of the heat dissipation structure has a hollowed-out texture; a flange is provided at the edge of the hollowed-out texture; the flange is arranged parallel to the axis direction of the motor rotating shaft; the hollowed-out texture and the flange form a groove shape.

[0021] To achieve another object of the present invention, the present invention also provides a disk-type permanent magnet synchronous motor, including the heat dissipation structure of the above disk-type permanent magnet synchronous motor.

[0022] The heat dissipation structure of the disk-type permanent magnet synchronous motor and the disk-type permanent magnet synchronous motor provided by the present invention can improve the heat dissipation efficiency. Compared with the prior art, the fan of the present invention adopts a streamlined blade design, optimizing the aerodynamic performance and reducing the air flow resistance, thereby increasing the air volume and the heat dissipation efficiency. Experiments prove that this design can reduce the temperature of the motor by at least 20% under the same working conditions, significantly improving the heat dissipation performance. Specifically, the heat dissipation structure of the disk-type permanent magnet synchronous motor and the disk-type permanent magnet synchronous motor provided by the present invention have the following advantages:

[0023] 1. Adopt a multi-blade structure, and the blade shape is designed as a streamline to reduce the air flow resistance and increase the air volume. The blade material is selected as a lightweight and high-strength carbon fiber composite material to reduce the weight of the fan itself and the load on the motor. A high-precision dynamic balance correction is adopted between the blade and the motor rotating shaft to ensure the stability of the fan during high-speed rotation.

[0024] 2. The housing is made of aluminum alloy material, which has good heat conduction performance and sufficient mechanical strength. The surface of the housing is designed with a special texture to increase the surface area and improve the heat dissipation efficiency;

[0025] 3. A closed-loop air flow channel is formed between the fan and the housing to ensure that the hot air can be quickly discharged and cold air can be introduced at the same time.

[0026] 4. A simple installation interface is designed, enabling the fan and the housing to be quickly installed on the motor, and facilitating maintenance and replacement at the same time. The connection part between the fan and the housing adopts a modular design, which is convenient for separately replacing damaged components and reducing the maintenance cost. Description of the Drawings

[0027] The accompanying drawings of the present utility model form a part of the present utility model and are intended to visually assist in understanding the structure and operating principle of the present utility model. These drawings provide a detailed description of the present utility model so that professionals in the technical field can implement the present utility model. However, these drawings should be regarded as exemplary and do not constitute a limitation on the protection scope of the present utility model. In different drawings, if the same graphic marks appear, it means they represent the same or functionally similar features.

[0028] Figure 1 A schematic diagram of a fan of a heat dissipation structure according to an embodiment of the present utility model is shown;

[0029] Figure 2 A perspective view of a heat dissipation structure housing 3 according to an embodiment of the present utility model is shown;

[0030] Figure 3 A perspective view of the assembled fan and heat dissipation structure housing 3 according to an embodiment of the present utility model is shown;

[0031] Figure 4 A schematic cross-sectional view of a stator 6, a rotor 5, and a heat dissipation structure is shown.

[0032] Reference Signs

[0033] 1, Blade; 2, Shaft Connection Port; 3, Heat Dissipation Structure Housing

[0034] 4, Housing Connection Port; 5, Rotor; 6, Stator

[0035] 31, First Part of Heat Dissipation Structure Housing; 32, Second Part of Heat Dissipation Structure Housing Detailed Embodiment

[0036] The following further illustrates the technical solution provided by the present utility model in conjunction with embodiments.

[0037] The disk-type permanent magnet synchronous motor includes: a motor housing, a motor shaft, a rotor 5, and two stators 6; wherein, the rotor 5 and the two stators 6 are both placed inside the motor housing, the rotor 5 is located between the two stators 6 and is connected to the motor shaft, and is driven to rotate by the motor shaft;

[0038] The heat dissipation structure of the disk-type permanent magnet synchronous motor according to the present utility model will be described below with reference to the accompanying drawings. This heat dissipation structure is located between the two stators 6 and includes a fan and a heat dissipation structure housing 3.

[0039] The heat dissipation structure housing 3 is detachably connected to the motor housing and has a cavity for accommodating the fan;

[0040] The motor shaft extends into the heat dissipation structure housing 3;

[0041] The fan is located within the cavity of the heat dissipation structure housing 3 and is detachably connected to the motor shaft, and rotates driven by the motor shaft.

[0042] According to the appendix Figure 1 and the appendix Figure 2 , the fan includes: a shaft connection part 2 and a plurality of blades 1. The shaft connection part 2 is used for detachably connecting to the motor shaft; the plurality of blades 1 are integrally formed with the shaft connection part 2 and are arranged uniformly in the circumferential direction of the shaft connection part 2.

[0043] The blade 1 is designed to be streamlined. This design not only optimizes the air flow path, reduces the resistance during air flow, but also significantly increases the air volume. The cross-sectional shape of the streamlined blade 1 helps to generate greater wind pressure and air volume when the fan rotates, thereby improving the heat dissipation efficiency.

[0044] The material of the blade 1 is selected as a lightweight and high-strength carbon fiber composite material. This material not only has excellent mechanical properties but also is light in weight, which helps to reduce the weight of the entire fan system. By reducing the weight of the blade 1, the load on the motor is also correspondingly reduced, thereby extending the service life of the motor and reducing energy consumption.

[0045] The connection between the blade 1 and the shaft connection part 2 of the motor undergoes high-precision dynamic balance correction. This step ensures the stability of the fan during high-speed rotation and reduces the vibration caused by imbalance. The dynamic balance correction not only improves the operating efficiency of the fan but also reduces noise and improves the user experience.

[0046] Referring to the appendix Figure 2 and the appendix Figure 3 , the heat dissipation structure housing 3 is made of aluminum alloy material, which is known for its excellent heat conduction performance and sufficient mechanical strength. The aluminum alloy heat dissipation structure housing 3 can not only effectively conduct heat but also has sufficient mechanical strength to protect the internal components of the fan from external impacts.

[0047] As Figure 2-4 shown, the heat dissipation structure housing 3 includes: a first part 31 of the heat dissipation structure housing, a second part 32 of the heat dissipation structure housing, and a housing connection part 4. The first part 31 of the heat dissipation structure housing and the second part 32 of the heat dissipation structure housing are arranged opposite to each other and are detachably connected through the housing connection part 4. A cavity for accommodating the fan is formed between the first part 31 of the heat dissipation structure housing and the second part 32 of the heat dissipation structure housing. The housing connection part 4 can be a matching protrusion and chute, or a clamping component. Installing the housing connection part 4 simplifies the installation process, and the modular design facilitates quick replacement and maintenance, reducing the maintenance cost. This embodiment demonstrates its effective heat dissipation performance and motor protection ability under standard working conditions.

[0048] As Figure 2As shown, the surface of the heat dissipation structure housing 3 has a specially designed hollow texture. A flange is provided at the edge of the hollow texture, and the flange is arranged parallel to the axis direction of the motor rotating shaft; the hollow texture and the flange form a groove shape. This texture design not only increases the surface area of the heat dissipation structure housing 3, but also improves the heat dissipation efficiency. By increasing the area in contact with the air, the heat dissipation is accelerated, thereby improving the heat dissipation performance of the entire system.

[0049] The heat dissipation structure housing 3 is detachably connected to the motor housing, for example, it can be connected by a buckle.

[0050] Combined with the attached Figure 3 and the attached Figure 4 , a closed-loop air flow channel is formed between the fan and the heat dissipation structure housing 3. This design ensures that the hot air can be quickly discharged, while introducing cold air to achieve effective heat exchange, that is, the cold air flows towards the direction close to the motor, and the hot air flows towards the direction away from the motor. The design of the closed-loop air flow channel not only improves the heat dissipation efficiency, but also helps to maintain the cleanliness inside the fan and reduce dust accumulation.

[0051] The fan and the heat dissipation structure housing 3 adopt a modular design. This design allows for individual replacement when components are damaged, effectively reducing the maintenance cost. The modular design not only improves the reliability of the system, but also makes maintenance and replacement more convenient, reducing the overall cost of ownership for users.

[0052] Example 1

[0053] In Example 1, a fan with a standard configuration and a heat dissipation structure housing 3 are provided, which are suitable for a disc permanent magnet synchronous motor under general working conditions. The fan is designed with 6 streamlined blades 1 to optimize the aerodynamic performance and increase the air volume. At the same time, the blades 1 are made of a lightweight and high-strength carbon fiber composite material to reduce the weight and the load on the motor. The connection between the blades 1 and the connection part 2 of the motor rotating shaft has been corrected by high-precision dynamic balancing to ensure stability and low vibration during high-speed rotation.

[0054] The heat dissipation structure housing 3 is made of 6061-T6 aluminum alloy material, which has excellent thermal conductivity and mechanical strength. The surface is treated by anodic oxidation to enhance corrosion resistance and wear resistance. The specially designed microgroove texture further increases the surface area and optimizes the heat dissipation performance. The heat dissipation system realizes efficient heat exchange and temperature control through the closed-loop air flow channel design.

[0055] Example 2

[0056] Under high - load conditions, this embodiment proposes an optimized heat - dissipation solution to ensure the stability and durability of the motor under extreme operating conditions. The fan design has been adjusted. The number of blades 1 has been increased to 9, and the angular distance between two adjacent blades 1 has been optimized to meet the greater air - volume demand. At the same time, the blades 1 are made of high - temperature - resistant carbon - fiber composite materials to maintain structural stability in high - load and high - temperature environments.

[0057] In the design of the heat - dissipation structure housing 3, the key heat - dissipation areas have been thickened, that is, the heat - dissipation structure housing 3 is provided with thickened areas.

[0058] The heat - dissipation structure may further include: fin - shaped heat - dissipation fins provided on the motor housing and / or the heat - dissipation structure housing 3 to increase the heat - dissipation area and improve the heat - exchange efficiency.

[0059] The heat - dissipation structure may further include: a heat - dissipation system provided on the motor housing and / or the heat - dissipation structure housing 3, such as auxiliary heat - dissipation components like integrated heat pipes or liquid - cooling plates, and an upgraded motor control unit to implement a more refined temperature - control strategy. In addition, a quick - release mechanism has been designed, that is, a detachable connection structure between the fan and the motor rotating shaft, the setting of the housing connection part 4, and a detachable connection structure between the heat - dissipation structure housing 3 and the motor housing, so that the blades 1 of the fan can be quickly replaced or repaired under high - load conditions.

[0060] In addition, this embodiment also includes the careful selection of the material and quantity of the fan blades 1, as well as the special thickening of the heat - dissipation structure housing 3 and the addition of heat - dissipation fins to cope with the extra heat brought by high loads. These improvements not only enhance the performance of the motor under high - load conditions but also improve its adaptability and reliability in extreme environments.

[0061] Embodiment 3

[0062] This embodiment provides a disc - type permanent - magnet synchronous motor equipped with the heat - dissipation structure provided in Embodiment 1 or Embodiment 2.

[0063] In summary, the heat - dissipation structure of the disc - type permanent - magnet synchronous motor and the disc - type permanent - magnet synchronous motor provided by the present utility model have the following advantages:

[0064] Enhanced structural stability. The high - precision dynamic - balance correction between the fan blades and the motor rotating shaft ensures the stability of the fan during high - speed rotation, reduces the additional losses and noise caused by vibration, and improves the overall operating efficiency of the motor.

[0065] Optimized housing heat - dissipation performance. The housing is made of aluminum alloy material, which has better heat - conduction performance. At the same time, the special texture design on the housing surface increases the surface area and improves the heat - dissipation efficiency. This design enables heat to be transferred from the motor to the housing more quickly and be discharged through the fan.

[0066] For easy installation and maintenance, a simple detachable connection structure and modular connection parts are designed, enabling the fan and the housing to be quickly installed on the motor, while facilitating maintenance and replacement. This design reduces the maintenance cost and improves the user's convenience of use.

[0067] Improve the service life of the motor. Combining the above technical advantages, the utility model can effectively extend the service life of the motor. By reducing the working temperature, reducing vibration and noise, and intelligently controlling the fan speed, the stability and reliability of the motor are significantly improved.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that any modification or equivalent replacement of the technical solutions of the utility model does not depart from the spirit and scope of the technical solutions of the utility model, and they should all be covered within the scope of the claims of the utility model.

Claims

1. A heat dissipation structure of a disc-type permanent magnet synchronous motor, the disc-type permanent magnet synchronous motor comprising: A motor housing, a motor shaft, a rotor, and two stators; wherein, the rotor and the two stators are both disposed within the motor housing, the rotor is located between the two stators and is connected to the motor shaft, and is driven to rotate by the motor shaft; characterized in that, The heat dissipation structure is located between the two stators and includes: a fan and a heat dissipation structure housing; The heat dissipation structure housing is detachably connected to the motor housing and has a cavity for accommodating the fan; The motor shaft extends into the heat dissipation structure housing; The fan is located within the cavity of the heat dissipation structure housing and is detachably connected to the motor shaft, and is driven to rotate by the motor shaft.

2. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 1, characterized in that The fan includes: a shaft connection portion and a plurality of blades; wherein, The shaft connection portion is used for detachably connecting to the motor shaft; the plurality of blades are connected to the shaft connection portion and are arranged uniformly in the circumferential direction of the shaft connection portion.

3. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 2, wherein The plurality of blades are integrally formed with the shaft connection portion.

4. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 2, characterized in that, The plurality of blades include: 6 to 9 blades.

5. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 2, characterized in that, The blades are streamlined.

6. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 2, wherein, The material of the blades includes: carbon fiber.

7. The heat dissipation structure of the disc permanent magnet synchronous motor according to claim 1, wherein The material of the heat dissipation structure housing includes: aluminum alloy.

8. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 1, characterized in that The heat dissipation structure housing includes: a first part of the heat dissipation structure housing, a second part of the heat dissipation structure housing, and a housing connection portion; wherein, the first part of the heat dissipation structure housing and the second part of the heat dissipation structure housing are disposed opposite to each other and are detachably connected by the housing connection portion; a cavity for accommodating the fan is formed between the first part of the heat dissipation structure housing and the second part of the heat dissipation structure housing.

9. The heat dissipation structure of the disc-type permanent magnet synchronous motor according to claim 1, characterized in that, The heat dissipation structure housing has a hollow texture; a flange is provided at the edge of the hollow texture; the flange is arranged parallel to the axis direction of the motor shaft; the hollow texture and the flange form a groove shape.

10. A disk-type permanent magnet synchronous motor, characterized in that, A heat dissipation structure of a disc-type permanent magnet synchronous motor according to any one of claims 1-9.

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