Low-voltage compact three-phase asynchronous variable-frequency motor

Abstract

The utility model provides a low-voltage compact three-phase asynchronous variable-frequency motor, which comprises a motor shell, a dust-proof cover plate is positioned on one side of a stator module and a rotor module of a stator and rotor module, and the dust-proof cover plate and the stator module of the stator and rotor module are fixedly mounted in the motor shell. A plurality of stator punching sheets of the stator module are fixedly arranged in the motor shell, four corners of each stator punching sheet are respectively provided with a group of ventilation slots, rib plates are arranged on the stator punching sheets, and a plurality of stator coils are wound on the inner sides of the stator punching sheets; the stator punching sheet is provided with a plurality of ventilation ducts, and the ventilation ducts and the rotor ventilation holes form an efficient heat dissipation system, thereby greatly reducing the operation temperature and prolonging the service life of the motor. The dustproof cover plate is provided with a heat dissipation notch and a diaphragm, so that the motor is clean and dustproof, the heat dissipation requirement is met, and stable and reliable operation is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-phase asynchronous variable frequency motors, in particular to a low-voltage compact three-phase asynchronous variable frequency motor. Background Art

[0002] In traditional three-phase asynchronous variable-frequency motor designs, heat dissipation efficiency is a critical issue, especially under high-power, high-load operating conditions. Traditional motor designs often use a single heat dissipation channel or cooling fan to reduce internal motor temperatures. However, these methods suffer from limited cooling effectiveness, uneven heat dissipation, and high noise levels. Furthermore, the accumulation of dust and impurities inside the motor can affect heat dissipation and operational stability, ultimately impacting its lifespan and performance.

[0003] Specifically, the stator laminations of traditional motors often lack dedicated ventilation slots, or the slots are poorly designed, resulting in poor stator heat dissipation. Meanwhile, rotor heat dissipation is often neglected, lacking an effective heat dissipation structure. Furthermore, the dust-proof design of the motor casing is often inadequate, allowing dust and impurities to enter the motor, affecting its normal operation.

[0004] Therefore, it is very necessary to invent a low-voltage compact three-phase asynchronous variable-frequency motor. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a low-voltage compact three-phase asynchronous variable-frequency motor, including a motor housing, a dust-proof cover and a stator-rotor module, the dust-proof cover is located on one side of the stator module and the rotor module of the stator-rotor module, the stator-rotor module includes a stator module and a rotor module, the stator module of the dust-proof cover and the stator-rotor module is fixedly installed inside the motor housing, the stator module of the stator-rotor module includes a stator punching, ventilation grooves, ribs and stator coils, a plurality of stator punchings are provided and fixedly installed inside the motor housing, a group of ventilation grooves are respectively opened on the four corners of each stator punching, a rib is installed on the stator punching, and a plurality of stator coils are wound inside.

[0006] Preferably, the rotor module of the stator-rotor module includes rotor punchings and rotor ventilation holes. There are a plurality of rotor punchings, and the plurality of rotor punchings are located on the inner side of the stator punchings. The plurality of rotor ventilation holes are provided in a circular array on the rotor punchings.

[0007] Preferably, a motor shaft is installed at the center of the plurality of rotor punchings, one end of the motor shaft rotates and passes through the outside of the motor housing, and a heat dissipation fan is fixedly installed at the other end thereof.

[0008] Preferably, the heat dissipation fan is located on the inner side of a heat dissipation rear shell fixedly mounted on the motor housing, and a junction box and a base are also fixedly mounted on the motor housing.

[0009] Preferably, the stator punching sheet is a rectangular sheet structure, and the ventilation slots opened on the stator punching sheet together constitute a stator heat dissipation channel.

[0010] Preferably, four groups of ventilation slots are provided, and the ventilation slots are horizontally inclined at a 45-degree angle and penetrate through the stator punching sheets.

[0011] Preferably, the rotor ventilation holes opened on the plurality of rotor punchings together constitute a rotor heat dissipation channel.

[0012] Preferably, the dustproof cover comprises a cover body, heat dissipation slots and a diaphragm. A plurality of heat dissipation slots are evenly distributed on the cover body, and a diaphragm is provided in each heat dissipation slot.

[0013] Preferably, at least a plurality of diaphragms are arranged in each heat dissipation slot to communicate with each other to form a circular structure. The diaphragms are fan-shaped membranes, which will deform under external pressure, and the diaphragms are not in direct sealing contact with each other.

[0014] Preferably, the stator module and the rotor module do not affect the deformation of the diaphragm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The ventilation slots at the four corners of the stator laminations in this utility model form numerous cooling ducts. Together with the circular array of rotor ventilation holes on the rotor laminations, they form a highly efficient heat dissipation system, significantly improving the motor's heat dissipation efficiency and effectively reducing operating temperatures, thereby extending the motor's service life. Furthermore, the introduction of a dustproof cover with its heat dissipation slots and diaphragm design not only ensures the cleanliness of the motor's interior, preventing the ingress of dust and impurities and guaranteeing stable operation, but also provides excellent dust protection while ensuring effective heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the utility model after the heat dissipation rear shell is separated.

[0018] Figure 2 This is a schematic diagram of the stator rotor module and motor shaft structure of the utility model.

[0019] Figure 3 It is a schematic diagram of the structure of the dustproof cover plate of the present utility model.

[0020] Figure 4 This utility model Figure 1 Schematic diagram of the local enlarged structure at point A.

[0021] In the picture:

[0022] Motor housing 1, dustproof cover 2, cover body 21, heat dissipation slot 22, diaphragm 23, stator rotor module 3, stator punching 31, ventilation slot 32, rib 33, stator coil 34, rotor punching 35, rotor ventilation hole 36, motor shaft 4, heat dissipation fan 5, heat dissipation rear shell 6, base 7, junction box 8. DETAILED DESCRIPTION

[0023] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0024] In the description of the embodiments, 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 accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the utility model, 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, an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0025] As attached Figure 1 To the attached Figure 4 As shown:

[0026] The utility model provides a low-voltage compact three-phase asynchronous variable-frequency motor, including a motor housing 1, a dust-proof cover 2 and a stator-rotor module 3. The dust-proof cover 2 is located on one side of the stator module and the rotor module of the stator-rotor module 3. The stator-rotor module 3 includes a stator module and a rotor module. The stator module of the dust-proof cover 2 and the stator-rotor module 3 is fixedly installed inside the motor housing 1. The stator module of the stator-rotor module 3 includes a stator punching 31, ventilation slots 32, ribs 33 and stator coils 34. Several stator punchings 31 are provided and fixedly installed inside the motor housing 1. A group of ventilation slots 32 are respectively opened on the four corners of each stator punching 31. A rib 33 is installed on the stator punching 31, and several stator coils 34 are wound inside.

[0027] Furthermore, in low-voltage compact three-phase asynchronous variable-frequency motors, the design of the rotor module is crucial. The rotor module of the stator-rotor module 3 includes multiple rotor punchings 35, which are located on the inner side of the stator punchings 31 and together constitute the rotating part of the motor. In order to improve heat dissipation efficiency, a plurality of rotor ventilation holes 36 are opened in a circular array on each rotor punching. These ventilation holes 36 are connected to each other to form an effective rotor heat dissipation channel. Through this design, the rotor can generate better air convection when rotating at high speed, effectively dissipating the heat generated by the rotor part and maintaining stable operation of the motor.

[0028] Furthermore, a motor shaft 4 is installed in the center of the rotor module. It not only supports the rotation of the rotor, but also integrates the function of a cooling fan. One end of the motor shaft 4 passes through the motor housing 1 and is connected to the outside for transmitting power or connecting to other equipment; the other end is fixedly installed with a cooling fan 5. This design not only saves space but also enables the active discharge of heat from the motor. The cooling fan 5 is located on the inside of the heat dissipation rear shell 6 fixedly installed on the motor housing 1. As the motor runs, the cooling fan 5 starts, draws out the hot air inside the motor, and discharges it through the heat dissipation rear shell, further improving the heat dissipation effect of the motor.

[0029] Furthermore, the stator module is the stationary part of the motor, responsible for generating the rotating magnetic field. To improve the heat dissipation efficiency of the stator, the stator laminations 31 are designed as rectangular sheets with four sets of ventilation slots 32. These ventilation slots 32 are arranged horizontally at a 45-degree angle throughout the stator laminations 31, forming a stator heat dissipation channel. This design allows the stator to simultaneously generate a magnetic field while also dissipating the generated heat through the ventilation slots, preventing heat accumulation and excessive temperature rise.

[0030] Furthermore, in order to prevent dust and impurities from entering the interior of the motor and affecting its operating stability and lifespan, the motor is also equipped with a dustproof cover 2. The dustproof cover includes a cover body 21, heat dissipation slots 22 and a diaphragm 23. A plurality of heat dissipation slots 22 are evenly distributed on the cover body to maintain air circulation inside the motor. A diaphragm 23 is provided in each heat dissipation slot 22. These diaphragms 23 are composed of fan-shaped membranes that can be deformed when subjected to external pressure, but are not in sealed contact with each other. This design not only ensures the heat dissipation effect of the motor, but also effectively prevents the entry of dust and impurities. At the same time, the design of the stator module and the rotor module also fully considers the impact on the deformation of the diaphragm 23, ensuring the dual effects of dust prevention and heat dissipation.

[0031] The working principle is as follows: First, when the motor is powered on, the stator coils 34 in the stator module are energized. Based on the principle of electromagnetic induction, these energized stator coils 34 generate a rotating magnetic field. This rotating magnetic field is the basis for the operation of the motor, which drives the rotor module to rotate.

[0032] The stator laminations 31, the primary component of the stator module, feature a rectangular structure and four sets of horizontal ventilation slots 32 inclined at 45 degrees, forming the stator heat dissipation channel. As the motor operates, heat generated by the stator coils 34 is transferred to the stator laminations 31 and rapidly discharged outside the motor housing 1 through the ventilation slots 32, thereby preventing excessive temperature buildup within the stator. Furthermore, the ribs 33 enhance the mechanical strength of the stator laminations, ensuring the stability and durability of the stator structure.

[0033] Next, the rotor module begins to rotate under the influence of the stator's rotating magnetic field. Multiple rotor ventilation holes 36 on the rotor plates 35 are aligned with each other, forming an effective rotor heat dissipation channel. As the rotor spins at high speed, these ventilation holes 36 promote air convection, effectively dissipating heat generated by the rotor, ensuring proper control of the rotor temperature and, in turn, stable operation of the motor.

[0034] Furthermore, the motor shaft 4 installed in the center of the rotor module not only serves as a support for the rotation of the rotor, but also integrates the function of a heat dissipation fan. During the rotation of the motor shaft 4, the heat dissipation fan 5 will automatically start. The heat dissipation fan 5 is located on the inner side of the heat dissipation rear shell 6 fixedly installed on the motor housing 1. It obtains power through the rotation of the motor shaft 4, extracts the hot air inside the motor, and discharges it to the external environment through the heat dissipation rear shell 6. During this process, the fan-shaped diaphragm 23 on the dustproof cover 2 can be deformed when subjected to external pressure, thereby opening the heat dissipation slot 22, thereby achieving the discharge of hot air. If the heat dissipation slot 22 is not deformed subsequently, it is closed, and the diaphragm 23 blocks the entry of dust and impurities. At the same time, this design also ensures that even when the motor is running, the heat dissipation effect of the motor will not be affected by the deformation of the diaphragm 23. Therefore, the dustproof cover 2 achieves a good balance between dust prevention and heat dissipation.

[0035] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the scope of protection of the utility model.

Claims

1. A low voltage compact three-phase asynchronous variable frequency motor, characterized in that: The invention comprises a motor housing (1), a dustproof cover plate (2) and a stator rotor module (3), wherein the dustproof cover plate (2) is located on one side of the stator module and the rotor module of the stator rotor module (3), and the stator rotor module (3) comprises a stator module and a rotor module. The dustproof cover plate (2) and the stator module of the stator rotor module (3) are fixedly installed inside the motor housing (1), and the stator module of the stator rotor module (3) comprises a stator punching sheet (31), a ventilation slot (32), a rib plate (33) and a stator coil (34). A plurality of stator punching sheets (31) are provided and fixedly installed inside the motor housing (1), and a group of the ventilation slots (32) are respectively opened on the four corners of each stator punching sheet (31). A rib plate (33) is installed on the stator punching sheet (31), and a plurality of stator coils (34) are wound inside.

2. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 1, characterized in that: The rotor module of the stator rotor module (3) comprises a rotor punching (35) and a rotor ventilation hole (36), wherein a plurality of the rotor punchings (35) are provided, and the plurality of the rotor punchings (35) are located on the inner side of the stator punching (31), and a plurality of the rotor ventilation holes (36) are provided in a circular array on the rotor punching (35).

3. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 2, characterized in that: A motor shaft (4) is installed at the center of the plurality of rotor punching sheets (35). One end of the motor shaft (4) rotates and passes through the outside of the motor housing (1), and a heat dissipation fan (5) is fixedly installed at the other end.

4. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 3, characterized in that: The heat dissipation fan (5) is located on the inner side of a heat dissipation rear shell (6) fixedly mounted on the motor housing (1). A junction box (8) and a machine base (7) are also fixedly mounted on the motor housing (1).

5. The low-voltage compact three-phase asynchronous variable-frequency motor according to claim 1, characterized in that: The stator punching sheet (31) is a rectangular sheet structure, and a plurality of ventilation slots (32) provided on the stator punching sheet (31) together form a stator heat dissipation channel.

6. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 4, characterized in that: Four groups of ventilation slots (32) are provided in total, and the ventilation slots (32) are horizontally inclined at a 45-degree angle and are provided through the stator punching sheet (31).

7. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 2, characterized in that: The rotor ventilation holes (36) opened on the rotor punching sheets (35) together form a rotor heat dissipation channel.

8. The low-voltage compact three-phase asynchronous variable-frequency motor according to claim 1, characterized in that: The dustproof cover plate (2) comprises a cover plate body (21), heat dissipation slots (22) and a diaphragm (23); a plurality of heat dissipation slots (22) are evenly distributed on the cover plate body (21), and a diaphragm (23) is provided in each heat dissipation slot (22).

9. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 8, characterized in that: At least a plurality of diaphragms (23) are arranged in each heat dissipation slot (22) to communicate with each other to form a circular structure. The diaphragms (23) are fan-shaped membranes. The diaphragms (23) will deform when subjected to external pressure. The diaphragms (23) are not in direct sealing contact with each other.

10. A low-voltage compact three-phase asynchronous variable-frequency motor according to claim 9, characterized in that: The stator module and the rotor module do not affect the deformation of the diaphragm (23).

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