Permanent magnet synchronous motor driving device

Abstract

The invention discloses a permanent magnet synchronous motor driving device, and relates to the technical field of motor driving. The device comprises a bottom plate, a protection structure is fixedly connected to the upper end face of the bottom plate, heat dissipation structures are uniformly and fixedly connected to the front and rear sides of an inner cavity of the protection structure, a heat exchange structure is arranged in the middle of the lower end face of the inner cavity of the protection structure, and a circulating conveying structure is arranged on the lower end face of the inner cavity of the protection structure and located in front of the heat exchange structure; through the heat dissipation structure on the protection structure, the circulation rate between an inner cavity of the protection frame and external air is increased in the using process, then heat dissipation and cooling are conducted on water cooling liquid after heat absorption in the heat exchange structure, through the heat exchange structure on the bottom plate, the flow of the water cooling liquid can be automatically adjusted through a control valve in an inner cavity of a storage box in the using process according to signals of a temperature sensor, and the cooling effect is improved. And the fan blades driven by the micro motor are combined to carry out secondary air cooling on heat absorption water-cooling liquid of the heat exchange pipeline, closed-loop feedback control is formed, and the graded heat dissipation strategy ensures that the temperature of the motor can still be kept stable when the load fluctuates, so that overheating protection shutdown is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor drive, in particular to a permanent magnet synchronous motor drive device. BACKGROUND

[0002] The magnetic synchronous motor provides excitation with permanent magnets, so that the motor structure is relatively simple, the processing and assembly cost is reduced, and the current collector ring and the brush prone to problems are saved, the reliability of the motor operation is improved, and the efficiency and power density of the motor are improved without excitation current and excitation loss. The permanent magnet synchronous motor is composed of a stator, a rotor and an end cover.

[0003] Through retrieval, the Chinese patent with the publication number CN117294079B discloses a permanent magnet synchronous motor drive device, which comprises a permanent magnet synchronous motor body and a driving shaft installed at one end of the permanent magnet synchronous motor body, a water tank, the water tank is installed at the bottom of the permanent magnet synchronous motor body; a circular shell, the circular shell is sleeved outside the permanent magnet synchronous motor body, the circular shell is installed on the water tank; a first air bag, the first air bag is installed inside the circular shell. The water in the water tank is pumped into the square tank body b through the water inlet pipe a, the strip-shaped air bag, the communication pipe a and the connecting pipe a, and is discharged into the water tank through the connecting pipe b, the communication pipe b, the strip-shaped air bag and the drain pipe b; the circulating water flow carries away the heat on the permanent magnet synchronous motor body, and the first air bag expands to press the strip-shaped air bag against the outer wall of the permanent magnet synchronous motor body, the strip-shaped air bag has a large size and covers most of the outer wall of the permanent magnet synchronous motor body, thereby enhancing the cooling effect.

[0004] The traditional motor can only rely on air cooling or liquid cooling to meet the continuous heat dissipation demand under high power density, which is easy to cause local overheating, efficiency reduction and even demagnetization of permanent magnets. The conventional heat dissipation structure has hot spots (such as winding end portion and magnetic pole gap), which leads to excessive local temperature rise. In compact equipment, there is insufficient heat dissipation space, the traditional fan / water tank occupies valuable installation position, the water cooling liquid is easy to scale and deteriorate during long-term use, which leads to pipeline blockage or corrosion, and the fluctuation of heat generation caused by the change of motor load, and the fixed heat dissipation rate causes the problems of energy waste or insufficient heat dissipation.

[0005] Therefore, the existing permanent magnet synchronous motor drive device cannot meet the demand in actual use, so there is an urgent need for improved technology on the market to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a permanent magnet synchronous motor drive device which solves the problems raised in the background art by setting.

[0007] To solve the above technical problems, the present application is realized by the following technical scheme: The application discloses a permanent magnet synchronous motor driving device, which comprises a bottom plate, a protection structure is fixedly connected to the upper end face of the bottom plate, heat dissipation structures are uniformly and fixedly connected to the front and back sides of the inner cavity of the protection structure, a heat exchange structure is arranged at the middle of the lower end face of the inner cavity of the protection structure, a circulating conveying structure is arranged at the front of the heat exchange structure on the lower end face of the inner cavity of the protection structure, an installation structure is fixedly connected to the upper end face of the protection structure, a permanent magnet motor is installed in the inner cavity of the installation structure, a heat conduction structure is sleeved with the outer surface of the permanent magnet motor, and a connecting bearing is fixedly connected to one side of the output end of the permanent magnet motor in the inner cavity of the installation structure. The protection structure comprises a protection frame fixedly connected to the upper end face of the bottom plate, a top plate fixedly connected to the upper end face of the protection frame, and installation grooves uniformly formed in the front and back end faces of the protection frame.

[0008] Preferably, the dustproof structure comprises a dustproof net movably sleeved in the inner cavity of the installation groove, magnetic attraction blocks fixedly connected to the outer surface of the dustproof net, magnetic attraction pieces fixedly connected to the side walls of the inner cavity of the installation groove and matched with the magnetic attraction blocks, and the inner cavities of the heat dissipation structures are matched with the inner cavities of the installation grooves.

[0009] Preferably, the heat dissipation structure comprises heat dissipation frames fixedly connected to the inner cavities of the front and back sides of the protection frame, a rotating frame fixedly connected to the inner cavity of the heat dissipation frame, a rotating shaft rotatably connected to the inner cavity of the rotating frame, leaves uniformly fixedly connected to the middle of the outer surface of the rotating shaft, a micro motor fixedly connected to the inner cavity of the rotating shaft, and a power control module fixedly connected to the front of the lower end face of the inner cavity of the protection frame and used for controlling the start of the heat dissipation structure.

[0010] Preferably, the heat exchange structure comprises heat exchange frames symmetrically fixedly connected to the inner cavity of the lower end face of the protection frame near the heat dissipation frames, heat exchange pipelines fixedly connected to the inner cavities of the heat exchange frames, a storage box fixedly connected to the middle of the lower end face of the inner cavity of the protection frame, a control valve arranged in the inner cavity of the storage box, and connecting pipes one fixedly connected to the front and back sides of the storage box and in transmission connection with the heat exchange pipelines.

[0011] Preferably, the circulating conveying structure comprises connecting pipes two fixedly connected to the front of the adjacent side of the two heat exchange pipelines, a connecting valve fixedly connected to the end of the connecting pipes two away from the heat exchange pipelines on the upper end face of the bottom plate, a conveying pipe fixedly connected to the upper end face of the connecting valve, and the conveying pipe is fixedly connected with the heat conduction structure through the top plate.

[0012] Preferably, the installation structure comprises support columns uniformly fixedly connected to the upper end face of the top plate, an installation frame fixedly connected to the inner cavity of the support column, a support frame fixedly connected to the rear end face of the inner cavity of the installation frame, a fixed column fixedly connected to the middle of the front end face of the support frame, and the permanent magnet motor is fixedly connected to the front end face of the fixed column.

[0013] Preferably, the permanent magnet motor includes a motor body fixedly connected to the front end face of the fixed column, a heat sink plate uniformly fixedly connected to the outer surface of the motor body, a heat sink blade fixedly connected to the outer surface of the output end of the motor body, a transmission shaft fixedly connected to the output end of the motor body, and the outer surface of the transmission shaft fixedly connected to the connecting bearing.

[0014] Preferably, the heat-conducting structure includes heat-conducting water inlet pipes symmetrically and fixedly connected to the front end of the top plate. The upper end face of the delivery pipe penetrates the top plate and is interconnected with the heat-conducting water inlet pipes. A heat-conducting return pipe is sleeved on the outer surface of the motor body between two adjacent heat dissipation plates. The heat-conducting water inlet pipes are symmetrically and fixedly connected to the lower front end of the two heat-conducting return pipes. A heat-conducting water outlet pipe is fixedly connected to the lower rear end of each of the two heat-conducting return pipes. C-shaped transmission pipes are fixedly connected to the front end faces of the two heat-conducting return pipes to realize the connection of the heat-conducting return pipes. The two C-shaped transmission pipes are sleeved on the outside of the output end of the motor body.

[0015] Preferably, the connecting bearing includes a connecting bushing fixedly connected to the front end face of the inner cavity of the mounting bracket. The front end face of the connecting bushing is evenly provided with ventilation grooves along the center line. A roller is evenly and movably sleeved in the inner cavity of the connecting bushing. A connecting ring is sleeved on the outer surface of the roller away from the connecting bushing. The outer surface of the transmission shaft is fixedly connected to the inner cavity of the connecting ring.

[0016] The present invention has the following beneficial effects: This invention utilizes a protective structure mounted on a base plate to install and place a heat dissipation structure and a mounting structure during use. The mounting slot, in conjunction with the heat dissipation structure, facilitates rapid airflow within the protective structure, thereby rapidly dissipating heat from the coolant in the heat exchange structure. A dustproof structure on the protective structure filters and isolates dust and impurities from the external air during ventilation and heat dissipation. Magnetic blocks allow for quick installation, removal, and replacement of the dustproof structure. The heat dissipation structure on the protective structure accelerates the airflow between the inner cavity of the protective frame and the outside air, further cooling the coolant in the heat exchange structure. The heat exchange structure on the base plate allows the control valve inside the storage tank to automatically adjust the coolant flow rate based on temperature sensor signals. Combined with a micro-motor-driven fan blade, this provides secondary air cooling of the heat exchange pipes, forming a closed-loop feedback control. This tiered heat dissipation strategy ensures stable motor temperature even under load fluctuations, preventing overheating and shutdown.

[0017] This invention utilizes a circulating conveying structure on the base plate. During operation, a connecting pipe connects the cooling fluid in the heat exchange structure to the heat conduction structure. A connecting valve further facilitates the circulation of the cooling fluid between the heat exchange, circulating, and heat conduction structures, enabling a heating-cooling-heating process during operation. The protective structure houses the permanent magnet motor and connecting bearing. A support frame and fixed column allow the permanent magnet motor to be suspended and fixed within the support column's inner cavity. This suspended support system ensures mechanical stability and creates a natural airflow. The perforated structure on the support frame allows airflow and filters dust, preventing condenser blockage. The permanent magnet motor on the mounting structure generates forced airflow through the rotation of the motor's output end via hot blades, coordinating with the cooling fluid in the heat exchange pipes. The system employs a dual cooling system of "air cooling + liquid cooling." Air cooling rapidly removes surface heat, while liquid cooling absorbs internal heat sources using high-specific-heat-capacity water coolant. This complementary approach avoids the limitations of a single cooling method. The heat-conducting structure on the permanent magnet motor, combined with a heat return pipe and a C-shaped transmission pipe, ensures the coolant flows evenly across all heat sinks, eliminating localized hot spots. Simultaneously, the embedded piping design of the heat-conducting structure directly transfers heat from the motor core to the coolant, shortening the heat transfer path and reducing thermal resistance. The cooled liquid, having undergone heat exchange, is then returned to the heat exchange piping via a heat-conducting outlet pipe. A portion of the high-temperature liquid is diverted to an independent heat dissipation channel via a rotating frame, preventing secondary heating and enabling the cascade utilization of waste heat, thus improving energy efficiency. The connecting bearings on the mounting structure, suspended from the mounting frame by the connecting bearings and fixed columns, effectively isolate vibration transmission. Furthermore, the rotational engagement between the connecting collar and the roller reduces mechanical stress concentration and extends bearing life.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front-view stereoscopic structural diagram of the present invention; Figure 2 This is a rear-view stereoscopic structural diagram of the present invention; Figure 3 This is a schematic diagram of the longitudinal half-section three-dimensional structure of the present invention; Figure 4 This is a schematic diagram of the transverse half-section three-dimensional structure of the present invention; Figure 5 This is a schematic diagram of the installation structure of the heat exchange structure of the present invention; Figure 6 This is a schematic diagram of the installation structure of the heat-conducting structure of the present invention; Figure 7 This is a schematic diagram of the installation structure of the heat-conducting structure and the permanent magnet motor of the present invention; Figure 8 For the present invention Figure 3 Enlarged structural diagram of region A in the middle; Figure 9 For the present invention Figure 4 Enlarged structural diagram of region B in the middle; Figure 10 For the present invention Figure 5 A magnified structural diagram of region C in the middle.

[0021] The attached diagram lists the components represented by each number as follows: 1. Base plate; 2. Protective structure; 21. Protective frame; 22. Top plate; 23. Mounting slot; 24. Dustproof structure; 241. Dustproof net; 242. Magnetic block; 3. Heat dissipation structure; 31. Heat dissipation frame; 32. Rotating frame; 33. Rotating shaft; 34. Fan blade; 4. Heat exchange structure; 41. Heat exchange frame; 42. Heat exchange pipeline; 43. Storage box; 44. Connecting pipe one; 5. Circulation conveying structure; 51. Connecting pipe two; 52. Connecting valve; 53. Conveyor... 6. Installation structure; 61. Support column; 62. Mounting frame; 63. Support frame; 64. Fixing column; 7. Heat conduction structure; 71. Heat conduction inlet pipe; 72. Heat conduction outlet pipe; 73. Heat conduction return pipe; 74. C-type transmission pipe; 8. Permanent magnet motor; 81. Motor body; 82. Heat dissipation plate; 83. Heat dissipation blades; 84. Transmission shaft; 9. Connecting bearing; 91. Connecting bushing; 92. Ventilation groove; 93. Roller; 94. Connecting collar. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0023] Please see Figures 1-10As shown, this embodiment is a permanent magnet synchronous motor drive device, including a base plate 1, a protective structure 2 fixedly connected to the upper end face of the base plate 1, heat dissipation structures 3 evenly fixedly connected to the front and rear sides of the inner cavity of the protective structure 2, a heat exchange structure 4 provided in the middle of the lower end face of the inner cavity of the protective structure 2, a circulation conveying structure 5 provided in front of the heat exchange structure 4 on the lower end face of the inner cavity of the protective structure 2, an installation structure 6 fixedly connected to the upper end face of the protective structure 2, a permanent magnet motor 8 installed in the inner cavity of the installation structure 6, a heat conduction structure 7 sleeved on the outer surface of the permanent magnet motor 8, and a connecting bearing 9 fixedly connected to one side of the output end of the permanent magnet motor 8 in the inner cavity of the installation structure 6. The protective structure 2 includes a protective frame 21 fixedly connected to the upper end face of the base plate 1. A top plate 22 is fixedly connected to the upper end face of the protective frame 21. Mounting grooves 23 are evenly opened on the front and rear end faces of the protective frame 21. A dustproof structure 24 is movably fitted inside the mounting groove 23. Through the protective structure 2 on the base plate 1, the heat dissipation structure 3 and the mounting structure 6 are installed and placed during use. Then, with the cooperation of the heat dissipation structure 3, the air inside the protective structure 2 can be quickly circulated through the mounting groove 23, thereby quickly dissipating heat from the water coolant in the heat exchange structure 4.

[0024] Furthermore, the dustproof structure 24 includes a dustproof net 241 that is movably fitted into the inner cavity of the mounting groove 23. Magnetic blocks 242 are fixedly connected to the outer surface of the dustproof net 241. Magnetic plates that match the magnetic blocks 242 are fixedly connected to the side wall of the inner cavity of the mounting groove 23. The inner cavity of the heat dissipation structure 3 matches the inner cavity of the mounting groove 23. Through the dustproof structure 24 on the protective structure 2, when the dustproof net 241 is used for ventilation and heat dissipation in the heat dissipation structure 3, dust and impurities in the external air are filtered and isolated. In turn, the magnetic blocks 242 enable personnel to quickly install, remove, and replace the dustproof structure 24.

[0025] Furthermore, the heat dissipation structure 3 includes a heat dissipation frame 31 fixedly connected to the front and rear sides of the inner cavity of the protective frame 21. A rotating frame 32 is fixedly connected to the inner cavity of the heat dissipation frame 31. A rotating shaft 33 is rotatably connected to the inner cavity of the rotating frame 32. Fan blades 34 are uniformly fixedly connected to the middle of the outer surface of the rotating shaft 33. A micro motor is fixedly connected to the inner cavity of the rotating shaft 33. The output end of the micro motor is fixedly connected to the fan blades 34. A power control module for controlling the start of the heat dissipation structure 3 is fixedly connected to the front of the lower end of the inner cavity of the protective frame 21. Through the heat dissipation structure 3 on the protective structure 2, the airflow rate between the inner cavity of the protective frame 21 and the outside air is accelerated during use, thereby allowing the water coolant in the heat exchange structure 4 to dissipate heat and cool down after absorbing heat.

[0026] Furthermore, the heat exchange structure 4 includes a heat exchange frame 41 symmetrically and fixedly connected to the lower end face of the inner cavity of the protective frame 21 near the heat dissipation frame 31. A heat exchange pipe 42 is fixedly connected to the inner cavity of the heat exchange frame 41. A storage box 43 is fixedly connected to the middle of the lower end face of the inner cavity of the protective frame 21. A control valve is installed in the inner cavity of the storage box 43. Connecting pipes 44 that are driven by the heat exchange pipe 42 are fixedly connected to both the front and rear end faces of the storage box 43. Through the heat exchange structure 4 on the base plate 1, the control valve in the inner cavity of the storage box 43 can automatically adjust the flow rate of the coolant according to the temperature sensor signal during use. Combined with the fan blades 34 driven by the micro motor, the coolant is drawn into the heat exchange pipe 42 for secondary air cooling, forming a closed-loop feedback control. This graded heat dissipation strategy ensures that the motor temperature can still be maintained stably when the load fluctuates, avoiding overheating protection shutdown.

[0027] Furthermore, the circulating conveying structure 5 includes a connecting pipe 2 51 fixedly connected to the front of the adjacent side of the two heat exchange pipes 42. A connecting valve 52 is fixedly connected to the end of the connecting pipe 2 51 away from the heat exchange pipe 42 on the upper end face of the base plate 1. A conveying pipe 53 is fixedly connected to the upper end face of the connecting valve 52. The upper end face of the conveying pipe 53 passes through the top plate 22 and is fixedly connected to the heat conduction structure 7. Through the circulating conveying structure 5 on the base plate 1, the coolant in the heat exchange structure 4 can be conveyed to the heat conduction structure 7 through the connecting pipe 2 51 and the conveying pipe 53 during use. Then, the setting of the connecting valve 52 realizes the circulation of coolant between the heat exchange structure 4, the circulating conveying structure 5 and the heat conduction structure 7, so that the coolant realizes the process of heating-cooling-heating during operation.

[0028] Furthermore, the mounting structure 6 includes support columns 61 uniformly fixedly connected to the upper end face of the top plate 22. A mounting frame 62 is fixedly connected to the inner cavity of the support column 61. A support frame 63 is fixedly connected to the rear end face of the inner cavity of the mounting frame 62. A fixing column 64 is fixedly connected to the middle of the front end face of the support frame 63. A permanent magnet motor 8 is fixedly connected to the front end face of the fixing column 64. Through the mounting structure 6 on the protective structure 2, the permanent magnet motor 8 and the connecting bearing 9 are installed and placed during use. The support frame 63 and the fixing column 64 enable the permanent magnet motor 8 to be suspended and fixedly installed in the inner cavity of the support column 61. The floating support system formed by the mounting frame 62 and the fixing column 64 ensures mechanical stability and forms a natural air duct. The perforated structure on the support frame 63 allows air circulation and filters dust, preventing the heat sink from being blocked.

[0029] Furthermore, the permanent magnet motor 8 includes a motor body 81 fixedly connected to the front end of the fixed column 64. A heat sink 82 is uniformly fixedly connected to the outer surface of the motor body 81. A heat sink blade 83 is fixedly connected to the outer surface of the output end of the motor body 81. A transmission shaft 84 is fixedly connected to the output end of the motor body 81. The outer surface of the transmission shaft 84 is fixedly connected to the connecting bearing 9. Through the permanent magnet motor 8 on the mounting structure 6, the rotation of the output end of the motor body 81 directly generates forced airflow through the heat sink blade 83. Combined with the circulation of water coolant in the heat exchange pipeline 42, a dual heat dissipation of "air cooling + liquid cooling" is formed. Air cooling quickly removes surface heat, while liquid cooling absorbs internal heat sources through water coolant with high specific heat capacity. The two complement each other and avoid the limitations of a single heat dissipation method.

[0030] Furthermore, the heat-conducting structure 7 includes heat-conducting water inlet pipes 71 symmetrically fixedly connected to the front end of the upper end of the top plate 22. The upper end of the conveying pipe 53 penetrates the top plate 22 and is interconnected with the heat-conducting water inlet pipes 71. A heat-conducting return pipe 73 is sleeved on the outer surface of the motor body 81 between two adjacent heat dissipation plates 82. The heat-conducting water inlet pipes 71 are symmetrically fixedly connected to the lower front end of the two heat-conducting return pipes 73. A heat-conducting water outlet pipe 72 is fixedly connected to the lower rear end of each of the two heat-conducting return pipes 73. C-shaped transmission pipes 74 are fixedly connected to the front end of the two heat-conducting return pipes 73 to achieve communication between them. The two C-shaped transmission pipes 74 are sleeved on the motor body 81. Outside the output end of the main body 81, the heat conduction structure 7 on the permanent magnet motor 8, through the combination of the heat conduction return pipe 73 and the C-shaped transmission pipe 74, allows the coolant to flow evenly through all the heat dissipation plates 82, eliminating local hot spots. At the same time, the heat conduction structure 7, through the embedded pipeline design, directly conducts heat from the motor core to the coolant, shortening the heat transfer path and reducing thermal resistance. Then, through the heat conduction outlet pipe 72, the coolant that has completed heat exchange is sent back to the heat exchange pipeline 42. Through the rotating frame 32 pipeline, some of the high-temperature liquid is diverted to an independent heat dissipation channel, which not only prevents secondary heating but also realizes the cascade utilization of waste heat and improves energy utilization efficiency.

[0031] Furthermore, the connecting bearing 9 includes a connecting sleeve 91 fixedly connected to the front end face of the inner cavity of the mounting bracket 62. The front end face of the connecting sleeve 91 is evenly provided with ventilation grooves 92 along the center line. Rollers 93 are evenly and movably sleeved in the inner cavity of the connecting sleeve 91. A connecting ring 94 is sleeved on the outer surface of the roller 93 away from the connecting sleeve 91. The outer surface of the transmission shaft 84 is fixedly connected to the inner cavity of the connecting ring 94. Through the connecting bearing 9 on the mounting structure 6, the connecting bearing 9 and the fixed column 64 are suspended and mounted on the mounting bracket 62, effectively isolating vibration transmission. At the same time, the rotational cooperation between the connecting ring 94 and the roller 93 reduces mechanical stress concentration and extends the bearing life.

[0032] Working principle: When in operation, the permanent magnet motor 8 is started, causing the output end of the motor body 81 to rotate, so the heat dissipation blades 83 rotate. At this time, since the mounting structure 6 and the connecting bearing 9 are both provided with holes, external air passes through the outer surface of the heat dissipation plate 82, thereby achieving wind-powered heat dissipation for the permanent magnet motor 8. At this time, the heat exchange structure 4 is activated, which causes the control valve inside the storage tank 43 to start. Under the control of the control valve, the coolant stored in the storage tank 43 enters the heat exchange pipeline 42 through the connecting pipe 1 44. At this time, the coolant in the heat exchange pipeline 42 enters the heat conduction structure 7 through the connecting pipe 2 51, the connecting valve 52 and the delivery pipe 53. At this time, the coolant enters the heat conduction return pipe 73 through the heat conduction inlet pipe 71. At this time, the coolant in the heat conduction return pipe 73 performs heat exchange on the heat conducted by the heat sink 82, thereby achieving rapid cooling of the permanent magnet motor 8. Furthermore, the heat conduction return pipe 73 and the C-type transmission pipe 74 enable the coolant to replace the heat dissipated by all the heat sinks 82. When the replacement is complete, the coolant inside the heat transfer return pipe 73 flows back to the heat exchange pipe 42 through the heat transfer outlet pipe 72. At this time, the operator controls the power control module to start the micro motor inside the rotating shaft 33, causing the fan blades 34 to rotate. This rapidly dissipates the heat absorbed by the coolant, and after cooling, it flows back to the installation structure 6 through the circulation conveying structure 5. When the coolant has been used for a certain period of time, the control valve inside the storage tank 43 is activated, causing the coolant to flow back into the storage tank 43 through the connecting pipe 44. This further delivers another portion of the coolant from the storage tank 43 to the rotating frame 32 pipeline, thus realizing a combined air and liquid cooling system. Furthermore, when the motor body 81 rotates, the transmission shaft 84 rotates. Since the transmission shaft 84 is fixedly connected to the connecting collar 94, the connecting collar 94 and the roller 93 rotate. At this time, the permanent magnet motor 8 is suspended and fixedly connected to the mounting bracket 62 through the connecting bearing 9 and the fixed column 64. In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A permanent magnet synchronous motor drive apparatus comprising a base plate (1), characterized in that; The bottom plate (1) upper end face fixedly connected with a protective structure (2), the protective structure (2) inner cavity front and rear sides are evenly fixedly connected with a heat dissipation structure (3), the protective structure (2) inner cavity lower end face middle part is provided with a heat exchange structure (4), the protective structure (2) inner cavity lower end face is located in the front of heat exchange structure (4) and is provided with a circulating conveying structure (5), the protective structure (2) upper end face fixedly connected with installation structure (6), installation structure (6) inner cavity is installed with permanent magnet motor (8), permanent magnet motor (8) outer surface is sleeved with heat conduction structure (7), installation structure (6) inner cavity is fixedly connected with connecting bearing (9) on the side of permanent magnet motor (8) output end. The protective structure (2) includes a protective frame (21) fixedly connected to the upper end face of the bottom plate (1), and the upper end face of the protective frame (21) is fixedly connected with a top plate (22). The front and rear sides of the protective frame (21) are evenly provided with installation grooves (23), and the installation grooves (23) are movably sleeved with dustproof structures (24).

2. A permanent magnet synchronous motor drive apparatus according to claim 1, characterized by, The dustproof structure (24) includes a dust screen (241) movably sleeved in the installation groove (23), and the outer surface of the dust screen (241) is fixedly connected with magnetic attraction blocks (242). The inner cavity of the installation groove (23) is fixedly connected with magnetic attraction pieces matched with the magnetic attraction blocks (242). The inner cavity of the heat dissipation structure (3) is matched with the inner cavity of the installation groove (23).

3. The permanent magnet synchronous motor drive apparatus according to claim 1, characterized by, The heat dissipation structure (3) includes heat dissipation frames (31) fixedly connected to the inner cavities of the front and rear sides of the protective frame (21). The inner cavities of the heat dissipation frames (31) are fixedly connected with rotating frames (32). The inner cavities of the rotating frames (32) are rotatably connected with rotating shafts (33). The outer surfaces of the rotating shafts (33) are evenly fixedly connected with fan blades (34) in the middle part. The inner cavities of the rotating shafts (33) are fixedly connected with micro-motors. The output ends of the micro-motors are fixedly connected with the fan blades (34). The lower end face of the inner cavity of the protective frame (21) is fixedly connected with a power control module for controlling the start of the heat dissipation structure (3).

4. The permanent magnet synchronous motor drive apparatus according to claim 1, characterized by, The heat exchange structure (4) includes heat exchange frames (41) symmetrically fixedly connected to the inner cavities of the lower end faces of the protective frame (21) near one side of the heat dissipation frame (31). The inner cavities of the heat exchange frames (41) are fixedly connected with heat exchange pipelines (42). The inner cavities of the heat exchange frames (41) are fixedly connected with storage boxes (43) in the middle part of the lower end face of the protective frame (21). The inner cavities of the storage boxes (43) are provided with control valves. The front and rear sides of the storage boxes (43) are fixedly connected with connection pipes one (44) in transmission connection with the heat exchange pipelines (42).

5. The permanent magnet synchronous motor drive of claim 1, wherein, The circulating conveying structure (5) includes a connection pipe two (51) fixedly connected to the front of one side adjacent to the heat exchange pipeline (42). The upper end face of the bottom plate (1) is fixedly connected with a connection valve (52) at one end away from the heat exchange pipeline (42) of the connection pipe two (51). The upper end face of the connection valve (52) is fixedly connected with a conveying pipe (53). The upper end face of the conveying pipe (53) penetrates through the top plate (22) and is fixedly connected with the heat conduction structure (7).

6. A permanent magnet synchronous motor drive apparatus according to claim 1, characterized by, The mounting structure (6) includes a support column (61) fixedly connected to the upper end surface of the top plate (22), the support column (61) is fixedly connected with a mounting frame (62) in the cavity, the mounting frame (62) is fixedly connected with a support frame (63) at the rear end surface in the cavity, the support frame (63) is fixedly connected with a fixed column (64) at the middle of the front end surface, and the fixed column (64) is fixedly connected with a permanent magnet motor (8) at the front end surface.

7. The permanent magnet synchronous motor drive of claim 1, wherein, The permanent magnet motor (8) includes a motor body (81) fixedly connected to the front end surface of the fixed column (64), the motor body (81) is fixedly connected with a heat dissipation plate (82) on the outer surface, the motor body (81) is fixedly connected with a heat dissipation paddle (83) on the outer surface of the output end, the motor body (81) is fixedly connected with a transmission shaft (84), and the transmission shaft (84) is fixedly connected with a connecting bearing (9) on the outer surface.

8. The permanent magnet synchronous motor drive of claim 1, wherein, The heat conduction structure (7) includes heat conduction inlet pipes (71) fixedly connected to the front end of the upper end surface of the top plate (22), the upper end surface of the conveying pipe (53) penetrates through the top plate (22) and is in communication with the heat conduction inlet pipes (71), the heat conduction return pipes (73) are sleeved on the outer surface of the motor body (81) between adjacent two heat dissipation plates (82), the heat conduction inlet pipes (71) are fixedly connected to the lower front end of the two heat conduction return pipes (73), the lower rear end of the two heat conduction return pipes (73) is fixedly connected with heat conduction outlet pipes (72), and the front end surfaces of the two heat conduction return pipes (73) are fixedly connected with C-shaped transmission pipes (74) for realizing the communication of the heat conduction return pipes (73), and the two C-shaped transmission pipes (74) are sleeved on the outer side of the output end of the motor body (81).

9. The permanent magnet synchronous motor drive of claim 1, wherein, The connecting bearing (9) includes a connecting shaft sleeve (91) fixedly connected to the front end surface in the cavity of the mounting frame (62), the connecting shaft sleeve (91) is uniformly provided with an air exchange groove (92) at the front end surface along the center line, the connecting shaft sleeve (91) is movably sleeved with a roller shaft (93) in the cavity, the roller shaft (93) is sleeved with a connecting shaft ring (94) on the side away from the connecting shaft sleeve (91) on the outer surface, and the transmission shaft (84) is fixedly connected with the connecting shaft ring (94) in the cavity on the outer surface.

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