A full-time efficient permanent magnet synchronous drive motor

Abstract

This invention relates to the field of permanent magnet synchronous drive motor technology, specifically a high-efficiency permanent magnet synchronous drive motor with full-time domain, comprising a housing, with a tail cover and a motor tail cover fixedly connected from the inside to the outside at the tail end of the housing, and an end cover and a motor end cover fixedly connected from the inside to the outside at the ends of the housing, with a plurality of housing through holes opened axially inside the housing, and inner partitions provided at both ends of the housing, the inner partitions dividing the tail end of the housing into a tail air-cooling cavity and a tail liquid-cooling cavity; by setting air-cooling and liquid-cooling heat dissipation structures inside the housing, dual heat dissipation of liquid cooling and air cooling is achieved; and during the heat dissipation process, the inside of the housing forms a relatively sealed cavity, thereby not only ensuring the heat dissipation effect during motor operation and extending the service life of the motor, but also preventing external dust or moisture from entering the inside of the housing during heat dissipation, thus ensuring the safety and stability of motor operation.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet synchronous drive motor technology, specifically to a high-efficiency permanent magnet synchronous drive motor with full-time domain. Background Technology

[0002] High-efficiency permanent magnet synchronous motors (PMSMs) are one of the main devices in modern new energy drive systems. They can operate stably across various speed ranges. PMSMs typically generate high temperatures during operation, which significantly impacts the permanent magnets, leading to demagnetization and consequently, performance degradation. Therefore, effective cooling of the motor during operation is crucial for ensuring its stability and lifespan.

[0003] A search revealed that Chinese patent CN121727298B discloses a high-efficiency permanent magnet synchronous drive motor with full-time domain, comprising a motor housing, an auxiliary heat dissipation assembly disposed outside the motor housing, a stator assembly disposed inside the motor housing, and a rotor assembly disposed inside the stator assembly; the auxiliary heat dissipation assembly includes a heat dissipation duct disposed outside the motor housing, a condenser plate disposed at the end of the heat dissipation duct, and a condenser shroud disposed axially outside the condenser plate; the rotor assembly includes a rotor core segment disposed inside the motor housing, a rotating shaft disposed inside the rotor core segment, and fiber sintered plates disposed on both axially outer sides of the rotor core segment; the rotating shaft has a conveying hole for conveying fluorinated liquid inside, and a liquid outlet groove is disposed radially outside the rotating shaft; when the rotating shaft rotates, the fluorinated liquid is thrown onto the surface of the fiber sintered plate by centrifugal force and moves along the surface of the fiber sintered plate. During motor operation, the fluorinated liquid inside the shaft is thrown out to the fiber sintering plate. The fluorinated liquid evaporates and absorbs heat, carrying away the heat generated during motor operation. At the same time, it is combined with air cooling and airflow to carry away the evaporated fluorinated liquid gas, achieving dual heat dissipation and ensuring the heat dissipation effect during motor operation.

[0004] While the aforementioned invention can effectively improve heat dissipation during motor operation, the fluorinated liquid vapor condenses and liquefies at the condenser plate, and the condenser plate is cooled by air, resulting in a weak cooling effect and low liquefaction efficiency. Furthermore, during heat dissipation, the motor's interior is connected to the outside via a heat dissipation channel, and the airflow carrying away some unliquefied fluorinated liquid gas leads to a waste of fluorinated liquid resources. Although the connection between the motor and the outside ensures heat dissipation, external dust can easily enter the motor, causing dust to adhere to the rotor and stator structures, affecting the motor's operational stability. Excessive dust accumulation also increases energy consumption, resulting in energy waste. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-efficiency permanent magnet synchronous drive motor with full-time domain, which can ensure the heat dissipation effect of the motor; and can also ensure the stability of the internal structure of the motor during the heat dissipation process, with the overall heat dissipation medium circulating internally, avoiding contamination or waste of the heat dissipation medium.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A high-efficiency permanent magnet synchronous drive motor with all-time domain includes a housing, inside which a motor stator and a motor rotor are arranged, and a main shaft is fixedly connected to the shaft of the motor rotor; The tail end of the outer shell is fixedly connected to a tail cover and a motor tail cover from the inside to the outside. The end of the outer shell is fixedly connected to an end cover and a motor end cover from the inside to the outside. The interior of the outer shell has several shell through holes along the axial direction. Both ends of the outer shell are provided with inner partitions. The inner partitions divide the tail end of the outer shell into a tail air-cooling cavity and a tail liquid-cooling cavity. The inner partitions divide the end end of the outer shell into an end air-cooling cavity and an end liquid-cooling cavity. The tail air-cooling cavity is connected to the end air-cooling cavity through the shell through holes. The tail liquid-cooling cavity is connected to the end liquid-cooling cavity through the shell through holes. The tail cap has an eccentric groove inside, and the eccentric groove is equipped with a wind circulation drive.

[0007] Preferably, the motor rotor includes a rotor core, rotor windings, permanent magnets and a magnetic shielding sleeve. The rotor core is segmented, and the permanent magnets inside different segments of the rotor core are segmented and independent. The motor stator includes a stator core and stator windings.

[0008] Preferably, the tail liquid cooling cavity and the end liquid cooling cavity are filled with coolant, and the main shaft body has a guide hole inside. The two ends of the guide hole have a liquid inlet hole and a liquid outlet hole, respectively. A spiral blade is fixedly connected inside the guide hole. When the spiral blade rotates, it drives the coolant to flow from the end liquid cooling cavity to the tail liquid cooling cavity.

[0009] Preferably, a cooling fan is fixedly connected to the outer section of the main shaft extending to the motor tail cover, a fan cover is fixedly connected to the tail of the outer casing, and cooling fins are uniformly fixedly connected to the outer side of the outer casing, with the fan cover covering the outer side of the cooling fins.

[0010] Preferably, the inner partition is fixedly connected to a connecting tube, which is alternately inserted into the through hole of the housing. A sealing ring is provided on the outside of the connecting tube. A flow guide rib is fixedly connected to the surface of the inner partition. The flow guide rib is provided on both sides of the inner partition. At least three flow guide ribs are provided on each side of the inner partition. They are evenly distributed along the axis of the inner partition and are spiral-shaped. Several radial drainage strips are fixedly connected to the outside of the tail cap.

[0011] Preferably, the air circulation drive includes a main drive wheel fixedly connected to the outside of the main shaft, an external gear ring rotatably connected inside the eccentric groove, a crescent plate fixedly connected inside the eccentric groove, an air outlet and an air inlet respectively opened inside the eccentric groove, the air outlet communicating with the inside of the outer shell, the air inlet communicating with the tail air-cooling cavity, the main drive wheel and the external gear ring meshing, the main drive wheel and the main shaft being coaxially fixedly connected, the eccentric groove and the main shaft being offset from each other, the main drive wheel and the external gear ring being offset from each other, and the crescent plate being located at the eccentric gap position between the main drive wheel and the external gear ring.

[0012] Preferably, the end cap is fixedly installed at the end of the outer casing, the end cap has a connecting hole, a guide plate is fixedly connected inside the connecting hole, and the interior of the outer casing is connected to the end air-cooling cavity through the connecting hole.

[0013] Preferably, a plurality of semiconductor cooling plates are fixedly connected to the tail of the motor tail cover. The semiconductor cooling plates are attached to the outside of the motor tail cover, with the cooling surface of the semiconductor cooling plates facing the tail liquid cooling cavity and the heating surface of the semiconductor cooling plates facing outward.

[0014] The beneficial effects of this invention are as follows: 1. The all-time-domain high-efficiency permanent magnet synchronous drive motor of this invention achieves dual heat dissipation through the installation of air-cooled and liquid-cooled heat dissipation structures inside the housing. During the heat dissipation process, the interior of the housing forms a relatively sealed cavity, which not only ensures the heat dissipation effect during motor operation and extends the service life of the motor, but also prevents external dust or moisture from entering the interior of the housing, thereby ensuring the safety and stability of motor operation. It also effectively reduces the waste and pollution of heat dissipation medium, and prevents external dust from adhering to the motor rotor or stator, which would increase the energy consumption of the motor operation, thus achieving energy-saving effect.

[0015] 2. The high-efficiency permanent magnet synchronous drive motor of the present invention uses circulating coolant. When the coolant flows within the through holes of the housing, it cools the stator area of ​​the motor. The coolant flowing on the outer layer, together with the heat dissipation fins, dissipates heat from the motor stator. At the same time, when the coolant flows back to the tail liquid cooling cavity through the guide holes in the main shaft, it cools the motor rotor through the main shaft, thereby reducing the overall temperature of the motor during operation, preventing the motor rotor from demagnetizing due to high temperature, and extending the service life of the motor.

[0016] 3. The high-efficiency permanent magnet synchronous drive motor of the present invention forms a circulating airflow inside the housing, and the returning hot air flows to the tail air-cooling cavity through the housing through-hole. During the return process, the hot air can be further cooled by the heat dissipation fins, thereby improving the air cooling effect on the motor. Moreover, when the motor is cooled by air, the inside of the motor is isolated from the outside, preventing external moisture or dust from entering the inside of the housing, thereby further ensuring the safety of the motor during operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the half-section structure of the present invention; Figure 4 This is a schematic diagram of the wind circulation drive structure of the present invention; Figure 5 This is a schematic diagram showing the inner partition and the motor tail cover of the present invention in a separated state; Figure 6 This is a schematic diagram of the inner partition and motor tail cover structure of the present invention; Figure 7 This is a schematic diagram of the end cap structure of the present invention; Figure 8 This is a schematic cross-sectional view of the main shaft of the present invention; Figure 9 For the present invention Figure 3 A magnified structural diagram of point A in the middle.

[0018] In the diagram: 1. Outer casing; 2. Motor stator; 3. Motor rotor; 4. Main shaft; 5. Cooling fan; 6. Fan cover; 7. Heat dissipation fins; 8. Inner partition; 9. Rear air-cooled cavity; 10. Rear liquid-cooled cavity; 11. Motor tail cover; 12. Housing through hole; 13. Air circulation drive; 14. End cover; 15. End air-cooled cavity; 16. End liquid-cooled cavity; 17. Rear cover; 18. Motor end 41. Cover; 42. Guide hole; 43. Spiral blade; 44. Liquid inlet hole; 81. Connecting tube; 82. Sealing ring; 83. Guide rib; 91. Radial guide strip; 111. Semiconductor cooling plate; 131. Main drive wheel; 132. External toothed ring; 133. Crescent plate; 134. Air outlet; 135. Air inlet; 141. Connecting hole; 142. Guide plate; 171. Eccentric groove. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 - Figure 9As shown, a high-efficiency permanent magnet synchronous drive motor with full time domain includes a housing 1, a motor stator 2 and a motor rotor 3 are arranged inside the housing 1, and a main shaft 4 is fixedly connected to the shaft of the motor rotor 3. The tail end of the outer shell 1 is fixedly connected to the tail end cap 17 and the motor tail end cap 11 from the inside to the outside. The end of the outer shell 1 is fixedly connected to the end end cap 14 and the motor end cap 18 from the inside to the outside. The interior of the outer shell 1 is provided with a number of shell through holes 12 along the axial direction. Both ends of the outer shell 1 are provided with inner partitions 8. The inner partitions 8 divide the tail end of the outer shell 1 into a tail air-cooling cavity 9 and a tail liquid-cooling cavity 10. The inner partitions 8 divide the end end of the outer shell 1 into an end air-cooling cavity 15 and an end liquid-cooling cavity 16. The tail air-cooling cavity 9 is connected to the end air-cooling cavity 15 through the shell through holes 12. The tail liquid-cooling cavity 10 is connected to the end liquid-cooling cavity 16 through the shell through holes 12. An eccentric groove 171 is provided inside the tail cover 17, and a wind circulation drive 13 is provided inside the eccentric groove 171.

[0021] The motor rotor 3 includes a rotor core, rotor windings, permanent magnets and magnetic shielding sleeves. The rotor core is segmented, and the permanent magnets inside different segments of the rotor core are segmented and independent. The motor stator 2 includes a stator core and stator windings.

[0022] The working principle of the all-time domain high-efficiency permanent magnet synchronous drive motor of the present invention is existing technology and will not be described in detail. It is only described that when working, the motor rotor 3 can drive the main shaft 4 to rotate.

[0023] The motor end cover 18 and the motor tail cover 11 are respectively fixedly installed on the front and rear sides of the outer casing 1. The motor end cover 18 and the motor tail cover 11 are used to close the outer casing 1 and form a relatively sealed working cavity inside the outer casing 1, thereby preventing external dust or moisture from contaminating the motor rotor 3 or motor stator 2 assembly inside the outer casing 1.

[0024] The tail cover 17 and the inner partition 8 form the tail air-cooling cavity 9, the inner partition 8 and the motor tail cover 11 form the tail liquid-cooling cavity 10, the end cover 14 and the inner partition 8 form the end air-cooling cavity 15, and the inner partition 8 and the motor end cover 18 form the end liquid-cooling cavity 16.

[0025] The rear air-cooling cavity 9 and the end air-cooling cavity 15 form an air-cooling heat dissipation structure; The tail liquid cooling cavity 10 and the end liquid cooling cavity 16 form a liquid cooling heat dissipation structure.

[0026] By setting up both air-cooled and liquid-cooled heat dissipation structures inside the housing 1, dual heat dissipation of liquid and air cooling is achieved. During the heat dissipation process, the interior of the housing 1 forms a relatively sealed cavity, which not only ensures the heat dissipation effect when the motor is working and extends the service life of the motor, but also prevents external dust or moisture from entering the interior of the housing 1 during heat dissipation, thereby ensuring the safety and stability of the motor operation.

[0027] In an optional embodiment, the tail liquid cooling cavity 10 and the end liquid cooling cavity 16 are filled with coolant. The main shaft body 4 has a guide hole 41 inside. The two ends of the guide hole 41 are respectively provided with a liquid inlet hole 43 and a liquid outlet hole 44. A spiral blade 42 is fixedly connected inside the guide hole 41. When the spiral blade 42 rotates, it drives the coolant to flow from the end liquid cooling cavity 16 to the tail liquid cooling cavity 10.

[0028] It should be noted that the spiral blade 42 is used to drive the coolant to circulate inside the outer casing 1, thereby cooling the running motor through the circulating coolant.

[0029] Specifically, during the operation of the motor, the motor rotor 3 drives the main shaft 4 to rotate. The coolant inside the end liquid cooling cavity 16 flows into the guide hole 41 through the liquid inlet hole 43. When the motor rotor 3 rotates, it drives the spiral blade 42 to rotate. Under the action of the spiral blade 42, the coolant is driven to flow towards the tail liquid cooling cavity 10. The coolant flows out into the tail liquid cooling cavity 10 through the liquid outlet hole 44. At the same time, the coolant in the tail liquid cooling cavity 10 flows back to the end liquid cooling cavity 16 through the coolant housing through hole 12, realizing the circulation of the coolant. The circulation of the coolant realizes liquid cooling heat dissipation during the operation of the motor.

[0030] In an optional embodiment, a cooling fan 5 is fixedly connected to the outer section of the main shaft body 4 extending to the motor tail cover 11, a fan cover 6 is fixedly connected to the tail of the outer casing 1, and heat dissipation fins 7 are uniformly fixedly connected to the outer side of the outer casing 1, with the fan cover 6 covering the outer side of the heat dissipation fins 7.

[0031] It should be noted that when the motor is working, the motor rotor 3 drives the main shaft 4 to rotate, the main shaft 4 drives the cooling fan 5 to rotate, and when the cooling fan 5 rotates, it drives the air to flow outward through the fan cover 6, and the generated airflow flows to the fan cover 6 through the gaps in the heat dissipation fins 7, and then flows outward through the cooling fan 5. By generating airflow between the heat dissipation fins 7, the heat dissipation effect of the heat dissipation fins 7 is improved.

[0032] In an optional embodiment, a connecting tube 81 is fixedly connected to the outside of the inner partition 8. The connecting tube 81 is alternately inserted into the through hole 12 of the housing. A sealing ring 82 is provided on the outside of the connecting tube 81. A guide rib 83 is fixedly connected to the surface of the inner partition 8. The guide rib 83 is provided on both sides of the inner partition 8. At least three guide ribs 83 are provided on each side of the inner partition 8. They are evenly distributed along the axis of the inner partition 8. The guide rib 83 is spiral. Several radial drainage strips 91 are fixedly connected to the outside of the tail cap 17.

[0033] It should be noted that the connecting tube 81 is used to extend the housing through hole 12. The tail liquid cooling cavity 10 and the end liquid cooling cavity 16 are both connected to the housing through hole 12 through the connecting tube 81. The tail liquid cooling cavity 10 is connected to the end liquid cooling cavity 16 through the guide hole 41. The tail liquid cooling cavity 10, the connecting tube 81, the housing through hole 12, the end liquid cooling cavity 16 and the guide hole 41 constitute the coolant circulation path.

[0034] Furthermore, the liquid inlet 43 is connected to the end liquid cooling cavity 16, and the liquid outlet 44 is connected to the tail liquid cooling cavity 10.

[0035] When the motor is working, the motor rotor 3 drives the main shaft 4 to rotate, the main shaft 4 drives the spiral blade 42 to rotate, and the spiral blade 42 drives the coolant to flow from the end liquid cooling chamber 16 to the tail liquid cooling chamber 10, so as to realize the circulation of coolant.

[0036] Among them, the radial guide strip 91 is used to cooperate with the guide rib 83. The radial guide strip 91 is used to disrupt the stable spiral flow airflow, so that the spiral flow gas can self-mix, thereby ensuring the uniformity of gas cooling in the tail air-cooling cavity 9.

[0037] By circulating the coolant, when the coolant flows within the through hole 12 of the housing, it cools the stator 2 area of ​​the motor. The coolant flowing on the outer layer, together with the heat dissipation fins 7, dissipates heat from the stator 2. At the same time, when the coolant flows back to the tail liquid cooling chamber 10 through the guide hole 41 opened in the main shaft 4, it cools the motor rotor 3 through the main shaft 4, thereby reducing the overall temperature of the motor during operation, preventing the motor rotor 3 from losing magnetism due to high temperature, and extending the service life of the motor.

[0038] It should be noted that the guide rib 83 is used to drive the air or coolant to flow in a spiral shape, thereby improving the contact effect between the coolant and the air, and thus improving the cooling effect of the coolant on the air. When the air inside the outer casing 1 is in self-circulation, it can improve the cooling effect of the air inside the tail air-cooling cavity 9, thereby improving the air-cooling heat dissipation effect.

[0039] In an optional embodiment, the air circulation drive 13 includes a main drive wheel 131 fixedly connected to the outside of the main shaft 4, an external gear ring 132 rotatably connected inside the eccentric groove 171, a crescent plate 133 fixedly connected inside the eccentric groove 171, an air outlet 134 and an air inlet 135 respectively opened inside the eccentric groove 171, the air outlet 134 communicates with the inside of the outer shell 1, the air inlet 135 communicates with the tail air cooling cavity 9, the main drive wheel 131 and the external gear ring 132 are meshed and connected, the main drive wheel 131 and the main shaft 4 are coaxially fixedly connected, the eccentric groove 171 and the main shaft 4 are offset from each other, the main drive wheel 131 and the external gear ring 132 are offset from each other, and the crescent plate 133 is located at the eccentric gap position between the main drive wheel 131 and the external gear ring 132.

[0040] It should be noted that the air outlet 134 and the air inlet 135 are located on both sides of the meshing position of the main drive wheel 131 and the external gear ring 132. When the main shaft 4 rotates, the main shaft 4 drives the main drive wheel 131 to rotate, and the main drive wheel 131 drives the external gear ring 132 to rotate. When the main drive wheel 131 and the external gear ring 132 are engaged, gas is pushed out. When the main drive wheel 131 and the external gear ring 132 are disengaged, gas is drawn in, thereby driving the gas from the air inlet 135 into the eccentric groove 171 and out through the air outlet 134 into the interior of the outer casing 1. The gas undergoes heat exchange in the tail air-cooling cavity 9 and the tail liquid-cooling cavity 10. The tail liquid-cooling cavity 10 cools the air inside the tail air-cooling cavity 9. After cooling, the air is introduced into the interior of the outer casing 1. The cold air cools the structure of the motor rotor 3 and the motor stator 2, thereby ensuring the stability and safety of the motor's operating temperature, avoiding excessively high temperatures during motor operation, and thus extending the motor's service life.

[0041] In an optional embodiment, the end cap 14 is fixedly installed at the end of the outer casing 1. The end cap 14 has a connecting hole 141. A guide plate 142 is fixedly connected inside the connecting hole 141. The interior of the outer casing 1 is connected to the end air-cooling cavity 15 through the connecting hole 141.

[0042] It should be noted that the air inside the outer casing 1 flows into the end air-cooling cavity 15 through the guide plate 142 and the connecting hole 141, thereby causing the air inside the end air-cooling cavity 15 to flow in a spiral shape, which improves the heat exchange effect between the flowing air and the end liquid-cooling cavity 16.

[0043] Specifically, when the tail air-cooling cavity 9 flows into the interior of the outer shell 1 under the action of the air circulation drive 13, it then flows into the end air-cooling cavity 15 through the connecting hole 141. When the tail air-cooling cavity 9 is drawn by the air circulation drive 13, the tail air-cooling cavity 9 draws air from the interior of the end air-cooling cavity 15 through the shell through hole 12, so that the air circulates inside the outer shell 1. The gas flows into the interior of the outer shell 1 from the tail air-cooling cavity 9. After being cooled inside the outer shell 1, the gas flows into the end air-cooling cavity 15. The end air-cooling cavity 15 flows back to the tail air-cooling cavity 9 through the shell through hole 12.

[0044] By forming a circulating airflow inside the outer casing 1, and the returning hot air flowing to the tail air-cooling cavity 9 through the casing through-hole 12, the hot air can be further cooled by the heat dissipation fins 7 during the return process, thereby improving the air cooling effect on the motor. Furthermore, when the motor is cooled by air, the inside and outside of the motor are isolated, preventing external moisture or dust from entering the inside of the outer casing 1, thereby further ensuring the safety of the motor during operation.

[0045] In an optional embodiment, a plurality of semiconductor cooling plates 111 are fixedly connected to the tail of the motor tail cover 11. The semiconductor cooling plates 111 are attached to the outside of the motor tail cover 11, with the cooling surface of the semiconductor cooling plates 111 facing the tail liquid cooling cavity 10 and the heating surface of the semiconductor cooling plates 111 facing outward.

[0046] It should be noted that the semiconductor cooling plate 111 is used to cool the coolant inside the tail liquid cooling cavity 10. At the same time, the heating surface of the semiconductor cooling plate 111 faces the cooling fan 5. When the semiconductor cooling plate 111 is working, the cooling fan 5 rotates synchronously to generate airflow, and the airflow carries away the working heat of the heating surface of the semiconductor cooling plate 111.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A full-time high-efficiency permanent magnet synchronous drive motor, comprising a shell body (1), the inside of the shell body (1) is provided with a motor stator (2) and a motor rotor (3), the shaft part of the motor rotor (3) is fixedly connected with a main shaft body (4), characterized in that, the tail part of the shell body (1) is fixedly connected with a tail cover (17) and a motor tail cover (11) from inside to outside, respectively, the end part of the shell body (1) is fixedly connected with an end cover (14) and a motor end cover (18) from inside to outside, respectively, the inside of the shell body (1) is provided with a plurality of shell through holes (12) along the axial direction, both ends of the shell body (1) are provided with an inner partition plate (8), the inner partition plate (8) separates a tail part air cooling cavity (9) and a tail part liquid cooling cavity (10) at the tail part of the shell body (1), the inner partition plate (8) separates an end part air cooling cavity (15) and an end part liquid cooling cavity (16) at the end part of the shell body (1), the tail part air cooling cavity (9) is communicated with the end part air cooling cavity (15) through the shell through hole (12), the tail part liquid cooling cavity (10) is communicated with the end part liquid cooling cavity (16) through the shell through hole (12); the inside of the tail cover (17) is provided with an eccentric groove (171), the inside of the eccentric groove (171) is provided with a wind circulation drive (13).

2. A full time domain high efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The motor rotor (3) comprises a rotor core, a rotor winding, a permanent magnet and a magnetic separation sleeve, the rotor core is provided in sections, the permanent magnets in different sections of the rotor core are provided in sections and are independent, the motor stator (2) comprises a stator core and a stator winding.

3. The full-time high-efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The tail part liquid cooling cavity (10) and the end part liquid cooling cavity (16) are filled with cooling liquid, the inside of the main shaft body (4) is provided with a flow guide hole (41), both ends of the flow guide hole (41) are provided with an inlet hole (43) and an outlet hole (44), respectively, the inside of the flow guide hole (41) is fixedly connected with a spiral blade (42), the spiral blade (42) drives the cooling liquid to flow from the end part liquid cooling cavity (16) to the tail part liquid cooling cavity (10) when rotating.

4. The full-time high-efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The main shaft body (4) is fixedly connected with a heat dissipation fan (5) at the external section of the motor tail cover (11), the tail part of the shell body (1) is fixedly connected with a fan cover (6), the outside of the shell body (1) is uniformly fixedly connected with a heat dissipation fin (7), and the fan cover (6) is covered outside the heat dissipation fin (7).

5. The full-time high-efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The outside of the inner partition plate (8) is fixedly connected with a connecting insertion pipe (81), the connecting insertion pipe (81) is alternately inserted into the shell through hole (12), the outside of the connecting insertion pipe (81) is provided with a sealing ring (82), the surface of the inner partition plate (8) is fixedly connected with a flow guide rib (83), the flow guide rib (83) is arranged on both sides of the inner partition plate (8), there are at least three flow guide ribs (83) on any one side of the inner partition plate (8) and are evenly distributed along the axis of the inner partition plate (8), the flow guide rib (83) is arranged in a spiral shape, and the outside of the tail cover (17) is fixedly connected with a plurality of radial drainage strips (91).

6. The full-time high-efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The air circulation drive (13) includes a main drive wheel (131) fixedly connected to the outside of the main shaft (4), an external gear ring (132) rotatably connected inside the eccentric groove (171), a crescent plate (133) fixedly connected inside the eccentric groove (171), an air outlet (134) and an air inlet (135) respectively opened inside the eccentric groove (171), the air outlet (134) is connected to the inside of the outer shell (1), the air inlet (135) is connected to the tail air cooling cavity (9), the main drive wheel (131) and the external gear ring (132) are meshed and connected, the main drive wheel (131) and the main shaft (4) are coaxially fixedly connected, the eccentric groove (171) and the main shaft (4) are offset, the main drive wheel (131) and the external gear ring (132) are offset, and the crescent plate (133) is located at the eccentric gap position between the main drive wheel (131) and the external gear ring (132).

7. The full-time high-efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The end cap (14) is fixedly installed at the end of the outer shell (1). The end cap (14) has a connecting hole (141). A guide plate (142) is fixedly connected inside the connecting hole (141). The interior of the outer shell (1) is connected to the end air-cooling cavity (15) through the connecting hole (141).

8. The full-time high-efficiency permanent magnet synchronous drive motor according to claim 1, characterized in that, The tail of the motor tail cover (11) is fixedly connected to a number of semiconductor cooling plates (111). The semiconductor cooling plates (111) are attached to the outside of the motor tail cover (11). The cooling surface of the semiconductor cooling plates (111) faces the tail liquid cooling cavity (10), and the heating surface of the semiconductor cooling plates (111) faces outward.

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