Permanent magnet synchronous motor with active heat dissipation function

Abstract

The invention discloses a permanent magnet synchronous motor with an active heat dissipation function, and relates to the technical field of permanent magnet synchronous motors, the permanent magnet synchronous motor comprises a machine body, a driving device, a temperature adjusting device and a compensation device, the machine body is provided with a driving cavity, the driving device is arranged in the driving cavity, the temperature adjusting device is connected with the machine body, and the compensation device is connected with the temperature adjusting device. The temperature adjusting device is used for conducting active heat dissipation on the machine body. The machine body serves as a main supporting foundation and is used for installing and fixing other devices, the driving device is powered on, torque is output under the action of a magnetic field, in the continuous torque output process, active heat dissipation is conducted on the driving device in the machine body through the temperature adjusting device, and the operation stability is guaranteed; and the compensation device is arranged to automatically compensate the heat dissipation part, so that the heat dissipation uniformity is improved.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet synchronous motor technology, specifically a permanent magnet synchronous motor with active heat dissipation function. Background Technology

[0002] Permanent magnet synchronous motors (PMSMs) have advantages such as high torque density and high control precision, and are widely used in various fields for power supply, especially in aviation conditions. However, conventional PMSMs cannot meet the thermal management requirements of the extreme environments in aviation.

[0003] During power supply, due to the uneven heat distribution inside the motor, conventional oil-immersed cooling can only provide equal-power cooling, easily causing localized heat accumulation inside the motor, thereby increasing copper losses and affecting the motor's service life. Furthermore, the differences between the internal hot zones of the motor vary under different operating conditions; a fixed cooling supply cannot adjust the cooling efficiency of these hot zones in real time according to the operating conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a permanent magnet synchronous motor with active heat dissipation function to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The permanent magnet synchronous motor includes a body, a drive unit, a temperature control device, and a compensation device. The body has a drive cavity, the drive unit is placed inside the drive cavity, the temperature control device is connected to the body, and the compensation device is connected to the temperature control device. The temperature control device is used to actively dissipate heat from the body.

[0006] The main body serves as the primary support foundation for mounting and securing other devices. By energizing the drive unit, torque is output under the influence of a magnetic field. During continuous torque output, the temperature control device actively dissipates heat from the drive unit inside the main body to ensure operational stability. A compensation device automatically compensates for heat dissipation, improving heat dissipation uniformity.

[0007] Furthermore, the machine body is provided with a liquid inlet, and the drive device includes a rotor, a drive shaft and a stator. The drive shaft and the drive cavity are rotatably connected. The rotor is sleeved on the drive shaft, and the stator is located on the outer layer of the rotor and placed inside the drive cavity. The temperature control device includes a circulating pump, a mounting plate, a ring pipe, and a guide pipe. Several mounting plates are arranged around the circumference of the drive cavity, and several ring pipes are arranged along the outer circle formed by the mounting plates. Cooling intervals are provided between adjacent ring pipes, and the length of the cooling intervals is gradually changed. The stator is in contact with the mounting plate. The guide pipe is connected to the liquid inlet pipe. The liquid delivery direction of the guide pipe is along the axis of the power output of the drive shaft. The guide pipe is connected to the ring pipe.

[0008] The cooling liquid is supplied through the liquid inlet, the rotor sleeve is arranged on the driving shaft, and permanent magnets are arranged on the rotor, when the stator winding is supplied with power, the magnetic field generated by the stator interacts with the magnetic field generated by the permanent magnet of the rotor, thereby driving the driving shaft to output torque through the rotor. The circulating pump is arranged to actively dissipate heat, when the cooling liquid enters the flow guide pipe through the liquid inlet, it is pumped into each annular pipe along the flow guide pipe to cool down, the space between the adjacent two annular pipes is defined as a cooling interval, the length of the cooling interval is gradually set according to the temperature gradient inside the driving cavity, thereby adjusting the local cooling capacity supply and ensuring the uniformity of the temperature inside the driving cavity.

[0009] Further, the length of the cooling interval is arranged to decrease along the liquid delivery direction of the flow guide pipe.

[0010] During the output torque process, the temperature in the driving cavity decreases from the rotor to the stator and increases along the output direction of the driving shaft, and the length of the cooling interval decreases along the liquid delivery direction of the flow guide pipe, that is, the closer to the output end of the driving shaft, the shorter the length of the cooling interval, so that the area of contact heat exchange in unit time is larger, and the heat exchange efficiency is improved.

[0011] Further, the flow guide pipe is provided with a main flow channel, the main flow channel is in communication with the liquid inlet pipe, and the lower end of the main flow channel is provided with a plurality of branch flow channels, the plurality of branch flow channels are respectively in communication with the pipe of the adjacent annular pipes, the compensation device comprises a cutoff plate, a rotating groove is arranged on one side of the cutoff plate, the rotating groove is in communication with the main flow channel, the cutoff plate and the rotating groove are rotatably connected, one end of the cutoff plate is inserted into the main flow channel, and the cutoff plate is arranged obliquely.

[0012] The liquid inlet is connected through the main flow channel, and the cooling liquid is injected into each annular pipe through the branch flow channel, the annular pipe and the mounting plate are supported by a material with high heat conductivity, and the cooling liquid in the driving cavity and the coil of the stator can be cooled down respectively, the branch flow channels and the rotating grooves are arranged in sequence along the liquid delivery direction of the flow guide pipe, the temperature difference in the adjacent cooling intervals is different under different power consumptions, the higher the temperature, the greater the temperature difference in the adjacent cooling intervals, and the amount of cooling liquid entering each annular pipe is adjusted by the cutoff plate, when the cooling liquid flows along the main flow channel, the cutoff plate is arranged obliquely downward, the cooling liquid is cut off and guided into the branch flow channel below the cutoff plate, and the remaining part continues to flow forward, so that real-time adjustment is performed.

[0013] Further, the compensation device further comprises an upper curved sheet and a lower curved sheet, one side of the upper curved sheet is fixedly connected with the lower curved sheet, one end of the upper curved sheet and the lower curved sheet is fixedly connected with the cutoff plate, and the other end is abutted with the rotating groove, and the thermal expansion coefficient of the upper curved sheet is greater than that of the lower curved sheet.

[0014] By setting the upper and lower curved sheets and inserting them into each cooling interval and contacting the cooling liquid for heat exchange, and by setting the difference in thermal expansion coefficients, the upper curved sheet is in abutment with the rotating groove when the thermal expansion coefficient is large, and the upper and lower curved sheets are in a flat state in the initial state; when heated and expanded, due to the unilateral fixation of the upper and lower curved sheets and the fastening connection of one end with the intercepting plate, the thermal expansion coefficient of the upper curved sheet is greater than that of the lower curved sheet, and due to being simultaneously placed in the driving cavity and contacting the cooling liquid for heat exchange to rise by the same temperature, the expansion amount of the upper curved sheet is greater than that of the lower curved sheet, and by abutting with the rotating groove, the intercepting plate is pushed to rotate, the included angle between the intercepting plate and the horizontal plane increases, thereby increasing the vertical intercepting area and improving the intercepting flow, and by automatically adjusting the local cooling capacity according to the temperature in the cooling interval, the cooling uniformity is ensured.

[0015] Further, the intercepting plate is sleeved with a rotating shaft, and the intercepting plate is rotatably connected with the rotating groove through the rotating shaft.

[0016] The rotating shaft is provided to guide the rotation of the intercepting plate, the outer cylindrical surface of the rotating shaft is in contact with the rotating groove to perform local sealing and prevent leakage during intercepting, thereby affecting the cooling capacity distribution accuracy. The intercepting plate is eccentrically arranged through the rotating center, the length of the lower section is less than that of the upper section, so that the part inserted into the main flow passage and the horizontal plane maintain a small included angle in the initial state, thereby facilitating subsequent adjustment.

[0017] Further, the machine body is provided with a circulating channel, the circulating channel is in communication with the liquid inlet pipeline, the outer circle of the driving shaft is provided with a plurality of flow guide seats, the outer side of the flow guide seat is provided with an arc surface, the inner side of the flow guide seat is provided with a horizontal flow surface, the driving shaft is provided with a flow guide channel, the flow guide channel is in communication with the circulating channel, and the outer circle of the flow guide channel is provided with a plurality of flow outlets.

[0018] The circulating channel is provided to divide the cooling liquid flowing out of the liquid inlet and into the flow guide channel, and during the rotation of the driving shaft, the cooling liquid is centrifuged out of the flow outlets through centrifugal force, and the high-temperature cooling liquid in the driving cavity is subjected to convection heat exchange. At the same time, the flow guide seats are uniformly arranged on the circumference of the driving shaft, so that the stress is balanced, the arc surface and the horizontal flow surface are arranged in an arc shape and have the same start and end points, but the arc surface has a larger curvature, so that the cooling liquid flowing through the arc surface has a faster flow rate, that is, the cooling liquid pressure at the outer arc surface is smaller, so that the cooling liquid at the inner horizontal flow surface flows outward, thereby improving the radial flow performance of the cooling liquid and ensuring the cooling efficiency.

[0019] As an optimization, the machine body is provided with a liquid outlet, the end of the flow dividing channel is in communication with the liquid outlet pipeline, the driving cavity is in communication with the liquid outlet pipeline, and the end of the liquid outlet is in communication with the circulating pump pipeline. The liquid outlet is provided to guide the liquid that is heated after participating in cooling, that is, the liquid at the outlet of the flow dividing channel and inside the driving cavity flows out through the liquid outlet, is cooled, and then reenters the liquid inlet through the circulating pump to perform a new round of cooling.

[0020] As optimization, a plurality of heat exchange surfaces are arranged in the annular chamber, and the heat exchange surfaces are in contact with the mounting plate. By arranging the heat exchange surfaces, the heat exchange surfaces and the mounting plate conduct heat exchange, thereby improving the heat exchange efficiency.

[0021] Compared with the prior art, the application has the beneficial effects that: when the cooling liquid enters the flow guide pipe through the liquid inlet, the cooling liquid is pumped into each annular chamber along the flow guide pipe to be cooled, the space between two adjacent annular chambers is defined as a cooling interval, the length of the cooling interval is gradually set according to the temperature gradient inside the driving cavity, so as to adjust the local cooling capacity supply and ensure the uniformity of the temperature inside the driving cavity; the length of the cooling interval decreases along the liquid delivery direction of the flow guide pipe, that is, the closer to the output end of the driving shaft, the shorter the length of the cooling interval, so that the area of contact heat exchange in unit time is larger, and the heat exchange efficiency is improved; under different power consumptions, the temperature difference in the adjacent cooling intervals is different, the higher the temperature, the greater the temperature difference in the adjacent cooling intervals, and the amount of cooling liquid entering each annular chamber is adjusted by arranging the intercepting plate, when the cooling liquid flows along the main flow channel, the intercepting plate is arranged obliquely downward to intercept the cooling liquid and guide the cooling liquid into the branch flow channel below the intercepting plate, and the remaining part continues to flow forward, so as to be adjusted in real time; when heated and expanded, the upper curved sheet and the lower curved sheet are fixed on one side, and one end is tightly connected with the intercepting plate, the thermal expansion coefficient of the upper curved sheet is greater than that of the lower curved sheet, the upper curved sheet and the lower curved sheet are simultaneously arranged in the driving cavity and contact heat exchange with the cooling liquid to increase the temperature by the same temperature, the expansion amount of the upper curved sheet is greater than that of the lower curved sheet, the upper curved sheet abuts against the rotating groove to push the intercepting plate to rotate, the included angle between the intercepting plate and the horizontal plane increases, so that the vertical intercepting area increases, the intercepting amount is improved, and the local cooling capacity is automatically adjusted according to the temperature in the cooling interval to ensure the uniformity of cooling. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the internal structure of the driving cavity of the application; Figure 3 It is a schematic diagram of the gradual change of the cooling interval of the application; Figure 4 It is a schematic diagram of the annular chamber structure of the application; Figure 5 It is a schematic diagram of the cooling liquid flow guide of the application; Figure 6 It is Figure 5 It is a partial enlarged view of the view; Figure 7 It is a schematic diagram of the transmission of the rotor and the flow guide seat of the application.

[0023] In the figure: 1, body; 11, drive cavity; 12, liquid inlet; 13, circulation channel; 14, liquid outlet; 2, driving device; 21, rotor; 22, drive shaft; 221, flow guide channel; 222, flow outlet; 23, stator; 24, flow guide seat; 241, arc surface; 242, flat surface; 3, temperature regulating device; 31, circulating pump; 32, mounting plate; 33, ring pipe; 331, heat exchange surface; 34, flow guide pipe; 341, main flow channel; 342, branch flow channel; 343, rotating groove; 4, compensation device; 41, intercepting plate; 42, upper curved piece; 43, lower curved piece; 44, rotating shaft. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] Embodiment: As shown in the figure, the present application provides a permanent magnet synchronous motor technical solution with active heat dissipation function. Figures 1-7

[0026] The permanent magnet synchronous motor comprises a body 1, a driving device 2, a temperature regulating device 3 and a compensation device 4. The body 1 is provided with a drive cavity 11. The driving device 2 is arranged in the drive cavity 11. The temperature regulating device 3 is connected with the body 1. The compensation device 4 is connected with the temperature regulating device 3. The temperature regulating device 3 is used for actively dissipating heat of the body 1.

[0027] The body 1 is used for mounting and fixing other devices as a main support base. By energizing the driving device 2, torque is output under the action of a magnetic field. In the process of continuously outputting torque, the driving device 2 in the body 1 is actively cooled by the temperature regulating device 3 to ensure operation stability. The compensation device 4 is arranged to automatically compensate for the heat dissipation part to improve heat dissipation uniformity.

[0028] Further, the body 1 is provided with a liquid inlet 12. The driving device 2 comprises a rotor 21, a drive shaft 22 and a stator 23. The drive shaft 22 is rotatably connected with the drive cavity 11. The rotor 21 is sleeved on the drive shaft 22. The stator 23 is located outside the rotor 21. The stator 23 is arranged in the drive cavity 11. ​The temperature regulating device 3 comprises a circulating pump 31, a mounting plate 32, a ring pipe 33 and a flow guide pipe 34, the mounting plate 32 is circumferentially arranged along the driving cavity 11, the ring pipes 33 are arranged along the outer circle surrounded by the mounting plates 32, the cooling intervals are arranged between the adjacent ring pipes 33, the length of the cooling intervals is gradually changed, the stator 23 is in contact with the mounting plate 32, the flow guide pipe 34 is in pipeline communication with the liquid inlet 12, the liquid feeding direction of the flow guide pipe 34 is along the axis direction of the power output of the driving shaft 22, and the flow guide pipe 34 is in pipeline communication with the ring pipe 33.

[0029] The cooling liquid is supplied through the liquid inlet 12, the rotor 21 is sleeved on the driving shaft 22 and is provided with permanent magnets, when the winding of the stator 23 is powered, the magnetic field generated by the stator 23 and the magnetic field generated by the permanent magnets of the rotor 21 interact, so that the driving shaft 22 is driven to output torque by the rotor 21. The circulating pump 31 is arranged to pump the liquid and actively dissipate heat, when the cooling liquid enters the flow guide pipe 34 through the liquid inlet, the cooling liquid is pumped into each ring pipe 33 along the flow guide pipe 34 to be cooled, the space between the adjacent two ring pipes 33 is defined as a cooling interval, and the length of the cooling interval is gradually changed according to the temperature gradient inside the driving cavity 11, so that the local cooling capacity supply is adjusted to ensure the uniformity of the temperature inside the driving cavity 11.

[0030] Further, the length of the cooling interval is gradually decreased along the liquid feeding direction of the flow guide pipe 34.

[0031] During the output of the torque, the temperature in the driving cavity 11 decreases from the rotor 21 to the stator 23 and increases along the output direction of the driving shaft 22, and the length of the cooling interval decreases along the liquid feeding direction of the flow guide pipe 34, that is, the closer to the output end of the driving shaft 22, the shorter the length of the cooling interval, so that the area of contact heat exchange in unit time is larger, and the heat exchange efficiency is improved.

[0032] Further, the flow guide pipe 34 is provided with a main flow channel 341, the main flow channel 341 is in pipeline communication with the liquid inlet 12, the lower end of the main flow channel 341 is provided with a plurality of branch flow channels 342, the plurality of branch flow channels 342 are respectively in pipeline communication with the adjacent ring pipes 33, the compensation device 4 comprises a cutoff plate 41, one side of the branch flow channel 342 is provided with a rotating groove 343, the rotating groove 343 is in communication with the main flow channel 341, the cutoff plate 41 is rotatably connected with the rotating groove 343, one end of the cutoff plate 41 is inserted into the main flow channel 341, and the cutoff plate 41 is arranged in an inclined manner.

[0033] The cooling liquid is connected to the inlet 12 through the main flow channel 341 and injected into each annular pipe 33 through the branch flow channel 342. The annular pipe 33 and the mounting plate 32 are supported by a material with high thermal conductivity, which can cool the cooling liquid in the driving cavity 11 and the coil of the stator 23 respectively. The branch flow channel 342 and the rotating groove 343 are arranged along the liquid conveying direction of the flow guide pipe 34. In different power consumption conditions, the temperature difference in the adjacent cooling intervals is different. The higher the temperature, the greater the temperature difference in the adjacent cooling intervals. The amount of cooling liquid entering each annular pipe 33 is adjusted by setting the intercepting plate 41. When the cooling liquid flows along the main flow channel 341, the intercepting plate 41 is arranged obliquely downward to intercept the cooling liquid and guide it into the branch flow channel 342 below the intercepting plate 41. The remaining part continues to flow forward, thereby being adjusted in real time.

[0034] Further, the compensation device 4 further comprises an upper curved sheet 42 and a lower curved sheet 43. One side of the upper curved sheet 42 is fixedly connected with the lower curved sheet 43. One end of the upper curved sheet 42 and the lower curved sheet 43 is fixedly connected with the intercepting plate 41, and the other end is in abutment with the rotating groove 343. The thermal expansion coefficient of the upper curved sheet 42 is greater than that of the lower curved sheet 43.

[0035] By setting the upper curved sheet 42 and the lower curved sheet 43 and inserting them into each cooling interval to exchange heat with the cooling liquid, and by setting the difference in thermal expansion coefficients, the upper curved sheet 42 in abutment with the rotating groove 343 has a greater thermal expansion coefficient. In the initial state, the upper curved sheet 42 and the lower curved sheet 43 are in a flat state. When heated and expanded, due to the unilateral fixation of the upper curved sheet 42 and the lower curved sheet 43 and the fixed connection of one end with the intercepting plate 41, the thermal expansion coefficient of the upper curved sheet 42 is greater than that of the lower curved sheet 43. Since they are simultaneously placed in the driving cavity 11 and contact the cooling liquid to exchange heat and rise by the same temperature, the expansion amount of the upper curved sheet 42 is greater than that of the lower curved sheet 43. By abutting with the rotating groove 343, the intercepting plate 41 is pushed to rotate, the included angle between the intercepting plate 41 and the horizontal plane increases, thereby increasing the vertical intercepting area and improving the intercepting amount. By automatically adjusting the local cooling capacity according to the temperature in the cooling interval, the uniformity of cooling is ensured.

[0036] Further, the intercepting plate 41 is sleeved with a rotating shaft 44, and the intercepting plate 41 is rotatably connected with the rotating groove 343 through the rotating shaft 44.

[0037] The rotating shaft 44 is provided to rotate and guide the intercepting plate 41. The outer cylindrical surface of the rotating shaft 44 is in contact with the rotating groove 343 to achieve local sealing and prevent leakage during intercepting, which affects the accuracy of the cooling capacity distribution. The intercepting plate 41 is eccentrically arranged through the rotating center, and the length of the lower segment is less than that of the upper segment, so that in the initial state, the part inserted into the main flow channel 341 and the horizontal plane have a small included angle, which is convenient for subsequent adjustment.

[0038] Further, the body 1 is provided with a circulation channel 13, the circulation channel 13 is in pipeline communication with the liquid inlet 12, the outer ring of the driving shaft 22 is provided with a plurality of guide seats 24, the outer side of the guide seat 24 is provided with an arc surface 241, the inner side of the guide seat 24 is provided with a flat flow surface 242, the driving shaft 22 is provided with a flow guide channel 221, the flow guide channel 221 is in pipeline communication with the circulation channel 13, and the outer ring of the flow guide channel 221 is provided with a plurality of flow discharge ports 222.

[0039] By arranging the circulation channel 13, the cooling liquid flowing out of the liquid inlet 12 is divided and enters the flow guide channel 221. During the rotation of the driving shaft 22, the cooling liquid is centrifuged out of the flow discharge port 222 through centrifugal force, and the high-temperature cooling liquid in the driving cavity 11 is subjected to convection heat exchange. At the same time, by arranging the guide seats 24 uniformly around the driving shaft 22, the force is balanced, the arc surface 241 and the flat flow surface 242 are arranged in an arc shape, and the starting point and the ending point are the same, but the curvature of the arc surface 241 is larger, so that the cooling liquid flowing through the two surfaces has a faster flow rate when flowing through the arc surface 241, that is, the cooling liquid pressure at the outer arc surface 241 is smaller, so that the cooling liquid at the inner flat flow surface 242 flows outward, improving the radial flow performance of the cooling liquid and ensuring the cooling efficiency.

[0040] As an optimization, the body 1 is provided with a liquid outlet 14, the end of the shunt channel 342 is in pipeline communication with the liquid outlet 14, the driving cavity 11 is in pipeline communication with the liquid outlet 14, and the end of the liquid outlet 14 is in pipeline communication with the circulating pump 31. By arranging the liquid outlet 14, the liquid that is heated after participating in cooling is guided, that is, the liquid at the outlet of the shunt channel 342 and inside the driving cavity 11 flows out through the liquid outlet 14, is cooled, and then reenters the liquid inlet 12 through the circulating pump 31 to perform a new round of cooling.

[0041] As an optimization, the inner side of the annular pipe 33 is provided with a plurality of heat exchange surfaces 331, and the heat exchange surfaces 331 are in contact with the mounting plate 32. By arranging the heat exchange surfaces 331, the heat exchange surfaces 331 and the mounting plate 32 conduct heat exchange, improving the heat exchange efficiency.

[0042] The working principle of the application is as follows: when the cooling liquid enters the flow guide pipe 34 through the liquid inlet, the cooling liquid is pumped into each annular pipe 33 along the flow guide pipe 34 to be cooled, the space between two adjacent annular pipes 33 is defined as a cooling interval, the length of the cooling interval is gradually set according to the temperature gradient inside the driving cavity 11, so as to adjust the local cooling capacity supply and ensure the uniformity of the temperature inside the driving cavity 11; the length of the cooling interval decreases along the liquid delivery direction of the flow guide pipe 34, that is, the closer to the output end of the driving shaft 22, the shorter the length of the cooling interval, so that the area of contact heat exchange in unit time is larger, and the heat exchange efficiency is improved; under different power consumptions, the temperature difference in adjacent cooling intervals is different, the higher the temperature, the greater the temperature difference in adjacent cooling intervals, the amount of cooling liquid entering each annular pipe 33 is adjusted by setting the intercepting plate 41, when the cooling liquid flows along the main flow channel 341, the intercepting plate 41 is arranged obliquely downward to intercept the cooling liquid and guide it into the branch flow channel 342 below the intercepting plate 41, and the remaining part continues to flow forward, so as to adjust in real time; when heated and expanded, since the upper curved sheet 42 and the lower curved sheet 43 are fixed on one side and tightly connected at one end with the intercepting plate 41, the thermal expansion coefficient of the upper curved sheet 42 is greater than that of the lower curved sheet 43, and since they are both placed in the driving cavity 11 and contact heat exchange with the cooling liquid to increase the temperature by the same temperature, the expansion amount of the upper curved sheet 42 is greater than that of the lower curved sheet 43, the intercepting plate 41 is pushed to rotate by abutting against the rotating groove 343, the included angle between the intercepting plate 41 and the horizontal plane increases, so that the vertical intercepting area increases, the intercepting amount is improved, and the local cooling capacity is automatically adjusted according to the temperature in the cooling interval to ensure the uniformity of cooling.

[0043] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A permanent magnet synchronous motor with active heat dissipation function, characterized in that: The permanent magnet synchronous motor comprises a body (1), a driving device (2), a temperature regulating device (3) and a compensation device (4), the body (1) is provided with a driving cavity (11), the driving device (2) is arranged in the driving cavity (11), the temperature regulating device (3) is connected with the body (1), and the compensation device (4) is connected with the temperature regulating device (3); the temperature regulating device (3) is used for actively dissipating heat of the body (1). The body (1) is provided with a liquid inlet (12), the driving device (2) comprises a rotor (21), a driving shaft (22) and a stator (23), the driving shaft (22) is rotationally connected with the driving cavity (11), the rotor (21) is sleeved on the driving shaft (22), and the stator (23) is located outside the rotor (21) and arranged in the driving cavity (11). The temperature regulating device (3) comprises a circulating pump (31), a mounting plate (32), a ring pipe (33) and a flow guide pipe (34), a plurality of mounting plates (32) are circumferentially arranged along the driving cavity (11), a plurality of ring pipes (33) are arranged on an outer circle formed by the mounting plates (32), cooling intervals are arranged between adjacent ring pipes (33), the lengths of the cooling intervals gradually change, the stator (23) is in contact with the mounting plate (32), the flow guide pipe (34) is in pipeline communication with the liquid inlet (12), the liquid delivery direction of the flow guide pipe (34) is along the axis direction of the power output of the driving shaft (22), and the flow guide pipe (34) is in pipeline communication with the ring pipe (33).

2. The permanent magnet synchronous motor with active heat dissipation function according to claim 1, characterized in that: The lengths of the cooling intervals gradually decrease along the liquid delivery direction of the flow guide pipe (34).

3. The permanent magnet synchronous motor with active heat dissipation function according to claim 2, characterized in that: The flow guide pipe (34) is provided with a main flow channel (341), the main flow channel (341) is in pipeline communication with the liquid inlet (12), a plurality of branch flow channels (342) are arranged at the lower end of the main flow channel (341), the plurality of branch flow channels (342) are respectively in pipeline communication with adjacent ring pipes (33), the compensation device (4) comprises a flow intercepting plate (41), one side of the branch flow channel (342) is provided with a rotating groove (343), the rotating groove (343) is in communication with the main flow channel (341), the flow intercepting plate (41) is rotationally connected with the rotating groove (343), one end of the flow intercepting plate (41) is inserted into the main flow channel (341), and the flow intercepting plate (41) is arranged in an inclined manner.

4. The permanent magnet synchronous motor with active heat dissipation function according to claim 3, characterized in that: The compensation device (4) further comprises an upper curved plate (42) and a lower curved plate (43), one side of the upper curved plate (42) is fixedly connected with the lower curved plate (43), one end of the upper curved plate (42) and the lower curved plate (43) is fixedly connected with the flow intercepting plate (41), the other end is in abutment with the rotating groove (343), and the thermal expansion coefficient of the upper curved plate (42) is greater than that of the lower curved plate (43).

5. The permanent magnet synchronous motor with active heat dissipation function according to claim 4, characterized in that: The flow intercepting plate (41) is sleeved with a rotating shaft (44), and the flow intercepting plate (41) is rotationally connected with the rotating groove (343) through the rotating shaft (44).

6. The permanent magnet synchronous motor with active heat dissipation function according to claim 5, characterized in that: The machine body (1) is provided with a circulation channel (13), the circulation channel (13) and the liquid inlet (12) are in pipeline communication, the outer circle of the driving shaft (22) is provided with a plurality of guide seats (24), the outer side of the guide seat (24) is provided with an arc surface (241), the inner side of the guide seat (24) is provided with a horizontal flow surface (242), the driving shaft (22) is provided with a flow guide channel (221), the flow guide channel (221) and the circulation channel (13) are in pipeline communication, and the outer circle of the flow guide channel (221) is provided with a plurality of flow discharge ports (222).

7. The permanent magnet synchronous motor with active heat dissipation function according to claim 6, characterized in that: The machine body (1) is provided with a liquid outlet (14), the end of the shunt channel (342) and the liquid outlet (14) are in pipeline communication, the driving cavity (11) and the liquid outlet (14) are in pipeline communication, and the end of the liquid outlet (14) and the circulating pump (31) are in pipeline communication.

8. The permanent magnet synchronous motor with active heat dissipation function according to claim 7, characterized in that: The inner side of the ring pipe (33) is provided with a plurality of heat exchange surfaces (331), and the heat exchange surfaces (331) are in contact with the mounting plate (32).

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