A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor
By incorporating an axial air inlet and a synchronously rotating fan into the permanent magnet synchronous variable frequency motor, combined with the rotor and stator air ducts, the problem of uneven airflow in the annular gap is solved, achieving efficient heat dissipation and a long motor life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI NEWSTAR ELECTRIC MOTOR CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-03
Smart Images
Figure CN224459547U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of electric motors, and more specifically, relates to a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor. Background Technology
[0002] A permanent magnet synchronous motor is a synchronous motor that uses permanent magnets to generate a magnetic field, and its rotor speed is consistent with the frequency of the current in the stator windings. Permanent magnet synchronous motors are widely used in many fields due to their advantages such as small size, high efficiency, and high power factor.
[0003] Currently available permanent magnet synchronous variable frequency motors include a housing, a rotor structure, and a stator structure. The rotor structure is rotatably mounted inside the housing, while the stator structure is fixed inside the housing and coaxially mounted on the outside of the rotor structure.
[0004] To dissipate heat from the motor, a fan is connected to the outside of the motor body. An air inlet is located on the motor body away from the fan. When the fan is started, outside air enters the motor through the air inlet, passes through the gap between the rotor and stator structures, and is then drawn out by the fan.
[0005] Because the gap between the rotor and stator structures is annular, the airflow at the location far from the air inlet is worse than that at the location near the air inlet, resulting in uneven airflow in the annular gap and affecting the heat dissipation effect. Utility Model Content
[0006] The purpose of this application is to provide a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor to solve the technical problem of uneven airflow in the annular gap affecting the heat dissipation effect in the prior art.
[0007] To achieve the above objectives, the technical solution adopted in this application is: to provide a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor, including a body, a rotor structure, and a stator structure; the body has opposing air inlets on both sides along its axial direction, and the air-cooled permanent magnet synchronous variable frequency motor further includes:
[0008] The fan is connected to the outside of the body; and
[0009] The fan is coaxially fixed on the shaft in the rotor structure and located between the two air inlets;
[0010] The fan is located at one end of the machine body facing its own axis, and the two air inlets are located at the other end of the machine body facing its own axis. When the rotor structure rotates, the rotating shaft drives the fan to rotate synchronously, so as to form an airflow that enters from the air inlets and flows along the axis of the machine body.
[0011] In one possible implementation, based on the above technical solutions, the rotor structure includes:
[0012] An annular bracket is coaxially fixed to the rotating shaft in the rotor structure;
[0013] Multiple magnetic pole cores are circumferentially distributed along the axial direction of the annular support on the outer side of the annular support; and
[0014] Multiple magnetic pole pads correspond one-to-one with multiple magnetic pole cores and are connected between the annular bracket and the magnetic pole cores;
[0015] The magnetic pole pads have strip-shaped holes on both sides facing the annular support, and the strip-shaped holes of adjacent magnetic pole pads form the first air duct of the rotor.
[0016] In one possible implementation, based on the above technical solutions, the inner wall of the strip hole has an arc shape along the radial cross-section of the annular bracket.
[0017] In one possible implementation, based on the above technical solutions, the annular support is provided with multiple ventilation holes that extend along its own axial direction, and each ventilation hole forms a second air duct for the rotor.
[0018] In conjunction with the above technical solutions, in one possible implementation, a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor further includes:
[0019] Multiple stiffening plates are fixed between the stator structure and the inner wall of the machine body;
[0020] The stator ribs are distributed at intervals along the circumference of the stator structure, and a stator air duct is formed between two adjacent stator ribs along the circumference of the stator structure.
[0021] In one possible implementation, based on the above technical solutions, the fan includes:
[0022] The mounting sleeve is coaxially fixed to the rotating shaft in the rotor structure; and
[0023] Multiple blades are circumferentially distributed on the outer circumferential surface of the mounting sleeve, and the blades are detachably connected to the mounting sleeve.
[0024] In one possible implementation, based on the above technical solutions, the mounting sleeve and the rotating shaft in the rotor structure are in an interference fit.
[0025] In one possible implementation, based on the above technical solutions, the blade and the mounting sleeve are connected by bolts.
[0026] In one possible implementation, based on the above technical solutions, a louver is provided at the air inlet, and a protective net is provided inside the louver.
[0027] The beneficial effects of the high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor provided in this application are as follows: Compared with the prior art, the fan in this application rotates synchronously with the rotor structure. On the one hand, it can cooperate with the fan to drive the outside air into the machine body from the air inlet, forming an airflow through the gap between the rotor structure and the stator structure. On the other hand, it can circumferentially turbulent the airflow at the two air inlets, making the outside air pass through the annular gap between the rotor structure and the stator structure more evenly, avoiding the problem of poor airflow at the air inlet, thereby significantly improving the heat dissipation effect. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 A partial vertical cross-sectional view of a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor provided in an embodiment of this application;
[0030] Figure 2 A vertical sectional view of the rotor structure and fan provided in the embodiments of this application;
[0031] Figure 3 This is a schematic diagram of the rotor structure provided in an embodiment of this application;
[0032] Figure 4 A partial structural schematic diagram of the rotor's first air duct provided in an embodiment of this application;
[0033] Figure 5 This is a schematic diagram of the structure of the stiffening plate and stator air duct provided in the embodiments of this application;
[0034] Figure 6 This is a schematic diagram of the structure of a louver provided in an embodiment of this application.
[0035] The labels for the attached figures are as follows:
[0036] 1. Organism;
[0037] 2. Rotor structure; 21. Annular support; 22. Magnetic pole core; 23. Magnetic pole pad; 24. First air duct of rotor; 25. Second air duct of rotor;
[0038] 3. Stator structure; 31. Stator air duct;
[0039] 4. Fan;
[0040] 5. Air inlet; 51. Louvers;
[0041] 6. Fan; 61. Mounting sleeve; 62. Blades;
[0042] 7. Rib board. Detailed Implementation
[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are only a part of the embodiments of this application, not all of them. The specific embodiments described herein are only used to explain this application and are not intended to limit this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0044] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.
[0045] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0046] The directional terms "inner" and "outer" refer to the inner and outer sides relative to the outline of each component itself. The terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0047] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used here to describe the spatial positional relationship of a device or feature as shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device as described in the figure. For example, if a device in the figure is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures.
[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.
[0049] The present application provides a description of a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor.
[0050] like Figure 1 and Figure 2 As shown, one embodiment of this application provides a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor, including a body 1, a rotor structure 2, a stator structure 3, a fan 4, and a 6.
[0051] The body 1 has an internal hollow structure and air inlets 5 are provided on both sides of its own axis.
[0052] The rotor structure 2 is coaxially arranged inside the body 1 and has a rotating shaft that rotates relative to the body 1.
[0053] The stator structure 3 is fixed inside the machine body 1 and coaxially arranged on the outside of the rotor structure 2.
[0054] The fan 4 is located on the outside of the body 1 and is connected to the internal space of the body 1.
[0055] The fan 6 is coaxially fixed on the shaft in the rotor structure 2 and located between the two air inlets 5.
[0056] Among them, the fan 4 is located at one end of the body 1 facing its own axis, and the two air inlets 5 are located at the other end of the body 1 facing its own axis; when the rotor structure 2 rotates, the rotating shaft drives the fan 6 to rotate synchronously, so as to form an airflow that enters from the air inlet 5 and flows along the axis of the body 1.
[0057] This embodiment provides a high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor. Compared with the prior art, the fan 6 rotates synchronously with the rotor structure 2. On the one hand, it can cooperate with the fan 4 to drive the outside air into the machine body 1 from the air inlet 5, forming an airflow through the gap between the rotor structure 2 and the stator structure 3. On the other hand, it can circumferentially turbulent the airflow at the two air inlets 5, making the outside air pass through the annular gap between the rotor structure 2 and the stator structure 3 more evenly, avoiding the problem of poor airflow at places far from the air inlets 5, thereby significantly improving the heat dissipation effect.
[0058] like Figures 2 to 3 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0059] The rotor structure 2 includes an annular support 21, multiple magnetic pole cores 22, and multiple magnetic pole pads 23; the annular support 21 is coaxially fixed on the rotating shaft in the rotor structure 2; the multiple magnetic pole cores 22 are circumferentially distributed on the outside of the annular support 21; the multiple magnetic pole pads 23 correspond one-to-one with the magnetic pole cores 22 and are connected between the annular support 21 and the magnetic pole cores 22.
[0060] refer to Figure 4 The magnetic pole pad 23 has strip-shaped holes on both sides, and the strip-shaped holes of adjacent magnetic pole pads 23 form the rotor's first air duct 24.
[0061] The rotor first air duct 24 provides an additional heat dissipation channel for the rotor, allowing air to flow inside the rotor and carry away the heat generated by the rotor. When the air flows in the rotor first air duct 24, it can fully exchange heat with the magnetic pole core 22 and the magnetic pole pad 23, effectively reducing the temperature of the rotor.
[0062] like Figure 4 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0063] The inner wall of the strip hole has an arc shape in the radial section along the annular support 21.
[0064] The arc-shaped design effectively reduces airflow resistance within the duct, allowing for smoother airflow and reducing turbulence and energy loss. Simultaneously, it reduces the impact and vibration of the airflow on the rotor structure 2, lowering noise and wear, and extending the motor's service life.
[0065] like Figure 3 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0066] The annular support 21 has multiple ventilation holes along its own axial direction, and each ventilation hole forms the rotor's second air duct 25.
[0067] The rotor's second air duct 25 allows air to flow within the annular support 21, improving the airflow distribution inside the rotor. Airflow through the rotor's second air duct 25 prevents heat accumulation in localized areas inside the motor, thus contributing to improved overall rotor heat dissipation uniformity.
[0068] like Figure 5 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0069] A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor also includes multiple stiffeners 7, which are fixed between the stator structure 3 and the inner wall of the body 1.
[0070] Among them, the stiffening plates 7 are distributed circumferentially along the axial direction of the stator structure 3, and stator air ducts 31 are formed between adjacent stiffening plates 7.
[0071] The stator air duct 31 provides a dedicated heat dissipation channel for the stator structure 3, allowing air to flow outside the stator structure 3, carrying away the heat generated by the stator structure 3, effectively reducing the temperature of the stator, and thus improving the overall heat dissipation effect of the motor.
[0072] like Figure 2 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0073] The fan 6 includes a mounting sleeve 61 and multiple blades 62; the mounting sleeve 61 is coaxially fixed on the rotating shaft in the rotor structure 2; the multiple blades 62 are circumferentially distributed on the outer circumferential surface of the mounting sleeve 61, and the blades 62 and the mounting sleeve 61 are detachably connected.
[0074] When the fan 6 malfunctions or requires maintenance, the operator can disassemble the blades 62 for inspection, repair or replacement, reducing the maintenance cost and difficulty of the fan 6; and can replace the blades 62 with different specifications and shapes according to the different working environment and needs of the motor, improving the applicability of the fan 6.
[0075] like Figure 2 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0076] The mounting sleeve 61 and the rotating shaft in the rotor structure 2 are interference fit.
[0077] The tight interference fit makes the concentricity between the fan 6 and the shaft higher, reducing the eccentricity and wobble of the fan 6 during rotation, which helps to improve the operating accuracy of the fan 6, enabling the fan 6 to drive airflow more effectively and improve the heat dissipation effect.
[0078] like Figure 2As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0079] The blade 62 is connected to the mounting sleeve 61 by bolts, and the bolts pass through the blade 62 and are threaded into the mounting sleeve 61.
[0080] Bolted connections are a simple, reliable, and easy-to-operate installation and disassembly structure. Operators can easily tighten or loosen bolts using common tools to install and remove blades 62. Furthermore, bolted connections provide sufficient connection strength to ensure the stability of blades 62 during the rotation of fan 6, enabling fan 6 to effectively drive airflow for heat dissipation.
[0081] like Figure 1 and Figure 6 As shown, this application provides another specific implementation method based on the above-described implementation method as follows:
[0082] Five air inlets are equipped with louvers 51, and the louvers 51 have protective nets inside.
[0083] The louvers 51 can act as a barrier to prevent large dust particles and debris from directly entering the motor. The protective mesh further filters dust and small particulate impurities in the air, preventing these impurities from entering the motor and adhering to components such as the rotor structure 2, stator structure 3, and fan 6. This helps to keep the inside of the motor clean, reduces the risk of poor heat dissipation and component damage caused by dust accumulation, and extends the service life of the motor.
[0084] Furthermore, the combination of the protective net and louvers 51 can effectively protect the internal structure of the motor from impacts and damage from external objects. For example, in some harsh working environments, there may be objects such as flying stones. Without protective measures, these objects may enter the motor and damage its components. The louvers 51 and the protective net can block these objects and ensure the safe operation of the motor.
[0085] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
[0086] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0087] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
Claims
1. A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor, comprising a body (1), a rotor structure (2), and a stator structure (3); characterized in that, The machine body (1) has air inlets (5) arranged opposite to each other on both sides along the axial direction. The air-cooled permanent magnet synchronous variable frequency motor also includes: The fan (4) is connected to the outside of the body (1); and The fan (6) is coaxially fixed on the shaft in the rotor structure (2) and located between the two air inlets (5); The fan (4) is located at one end of the body (1) facing its own axis, and the two air inlets (5) are located at the other end of the body (1) facing its own axis. When the rotor structure (2) rotates, the rotating shaft drives the fan (6) to rotate synchronously to form an airflow that enters from the air inlet (5) and flows along the axis of the body (1).
2. The high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in claim 1, characterized in that, The rotor structure (2) includes: The annular bracket (21) is coaxially fixed on the rotating shaft in the rotor structure (2); Multiple magnetic pole cores (22) are circumferentially distributed along the axial direction of the annular support (21) on the outer side of the annular support (21); and Multiple magnetic pole pads (23) correspond one-to-one with multiple magnetic pole cores (22) and are connected between the annular bracket (21) and the magnetic pole cores (22); The magnetic pole pad (23) has strip-shaped holes on both sides of the annular support (21) in the circumferential direction, and the strip-shaped holes of the adjacent magnetic pole pad (23) form the rotor first air duct (24).
3. The high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in claim 2, characterized in that, The inner wall of the strip hole has an arc shape along the radial section of the annular support (21).
4. The high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in claim 2, characterized in that, The annular support (21) has multiple ventilation holes that extend along its own axial direction, and each ventilation hole forms a second air duct (25) for the rotor.
5. The high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in claim 1, characterized in that, Also includes: Multiple stiffeners (7) are fixed between the stator structure (3) and the inner wall of the body (1); Among them, multiple stiffeners (7) are distributed at intervals along the circumference of the stator structure (3), and a stator air duct (31) is formed between two adjacent stiffeners (7) along the circumference of the stator structure (3).
6. A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in any one of claims 1-5, characterized in that, The fan (6) includes: Mounting sleeve (61) is coaxially fixed to the rotating shaft in the rotor structure (2); and Multiple blades (62) are circumferentially distributed on the outer circumferential surface of the mounting sleeve (61), and the blades (62) are detachably connected to the mounting sleeve (61).
7. A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in claim 6, characterized in that, The mounting sleeve (61) and the rotating shaft in the rotor structure (2) are interference fit.
8. A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in claim 6, characterized in that, The blade (62) is connected to the mounting sleeve (61) by bolts.
9. A high-efficiency heat dissipation air-cooled permanent magnet synchronous variable frequency motor as described in any one of claims 1-5, characterized in that, A louver (51) is provided at the air inlet (5), and a protective net is provided inside the louver (51).