An integrated electric ducted power device and its cooling method

Abstract

The present invention belongs to the technical field of green transportation electric vehicles and aircraft, and particularly relates to an integrated electric ducted power device and its cooling method. To improve the integration degree of the propulsion system of land-air mobile platforms and flying cars and achieve the lightweight design goal of the propulsion device, the integrated electric ducted power device provided by the present invention includes: a duct, a propeller, a support bracket, a permanent magnet bracket, a carbon fiber sleeve, permanent magnets, a stator core, a stator winding, a partition, and a motor controller. By integrally designing the rotor of the motor with the propeller blades and designing the motor stator and the motor controller inside the duct, the common use of the housing is realized. At the same time, through the oil immersion of the motor stator and the motor controller and the air cooling of the motor rotor, the air-oil hybrid cooling of the power device is achieved, reducing pipelines and eliminating the internal fuel tank of the mobile platform, thereby realizing the lightweight design of the integrated electric ducted power device.

Description

Technical Field

[0001] The present invention belongs to the technical field of green transportation electric vehicles and aircrafts, and particularly relates to an integrated electric ducted power device and a cooling method thereof. Background Art

[0002] As a core and key component of flying cars and amphibious vehicles, the response characteristics, weight, and integration degree of the propulsion system will have an important impact on the vehicle body structure, weight, and volume. The electric propulsion system generally includes components such as a duct / propeller, a motor, and a controller. In conventional designs, the motor and the controller are generally installed behind the duct / propeller. In order to obtain greater thrust, a motor with a higher power is used. However, a motor with a large power has a large outer diameter. Therefore, installing the motor behind the duct / propeller will have a greater impact on the aerodynamic characteristics of the duct / propeller. In addition, the three components of the duct / propeller, the motor, and the controller are separated from each other, with low integration and relatively heavy weight. At the same time, since there are many wires connected between the two components of the motor and the controller, a long distance between the two components will result in a very long cable length, which will increase a lot of weight. Summary of the Invention

[0003] (I) Technical Problems to be Solved

[0004] The technical problem to be solved by the present invention is: in order to improve the integration degree of the propulsion system of the land-air mobile platform and the flying car and achieve the lightweight design goal of the propulsion device, how to propose an integrated electric ducted power device and a cooling method thereof.

[0005] (II) Technical Solutions

[0006] To solve the above technical problems, an integrated electric ducted power device of the present invention includes: a duct 1, a propeller 2, a support bracket 3, a permanent magnet bracket 5, a carbon fiber sleeve 6, a permanent magnet 7, a stator core 8, a stator winding 9, a partition 10, and a motor controller 17;

[0007] A support bracket 3 is fixed to the inner wall of the duct 1, and the propeller 2 is rotatably installed on the support bracket 3; the support bracket 3 is a "cross" bracket and is coaxially located behind the propeller 2;

[0008] A motor is composed of the stator core 8, the stator winding 9, and the permanent magnet 7. Among them, the stator core 8 and the stator winding 9 are embedded in the inner wall of the duct 1 through a partition 10, and the permanent magnet 7 is fixedly installed on the outer edge of the propeller 2 through an annular permanent magnet bracket 5;

[0009] In the circumferential direction of the permanent magnet bracket 5, a number of permanent magnet receiving holes 19 in the form of blind holes are evenly opened in a circle from the outer diameter to the inner diameter direction. The permanent magnets 7 are embedded in the permanent magnet receiving holes 19, and outside the permanent magnets 7 in the whole circle of the permanent magnet bracket 5, the permanent magnets 7 are bound and constrained by a carbon fiber sleeve 6.

[0010] On the front end face of the partition plate 10, the stator core 8 and the stator winding 9 are fixedly arranged along the circumference. Between the stator core 8, the stator winding 9, the partition plate 10 and the wall surface of the duct 1, a front-end annular oil cavity is formed; on the rear end face of the partition plate 10, a motor controller 17 is arranged. The motor controller 17 is also embedded in the inner wall of the duct 1. Between the partition plate 10, the motor controller 17 and the wall surface of the duct 1, a rear-end oil cavity is formed; at the installation position of the motor controller 17 on the partition plate 10, an oil through-hole 11 is axially opened, penetrating through the front-end annular oil cavity and the rear-end oil cavity to form an integral oil storage cavity.

[0011] Among them, the stator core 8 and the stator winding 9 are embedded in the inner wall of the duct 1 through the partition plate 10, specifically as follows: the partition plate 10 is a toroidal body extending radially along the inner cavity of the duct 1, inserted into the inner wall of the duct 1, and the radial dimension of the inner ring of the toroidal body is the same as the dimension of the corresponding position of the inner wall of the duct 1.

[0012] On the front end face of the partition plate 10, the stator core 8 and the stator winding 9 are fixedly arranged along the circumference. Correspondingly, on the inner wall of the duct 1 at the corresponding position, a matching circular groove is opened for accommodating the stator core 8 and the stator winding 9. And after the stator core 8, the stator winding 9, and the partition plate 10 are integrally embedded into the inner wall of the duct 1, the innermost circle of the assembly formed by the stator core 8, the stator winding 9, and the partition plate 10 forms a smooth and complete inner wall with the inner wall of the duct 1. And between the stator core 8, the stator winding 9, the partition plate 10 and the wall surface of the circular groove of the duct 1, the front-end annular oil cavity is formed.

[0013] Among them, the motor controller 17 is arranged on the rear end face of the partition plate 10. The stator core 8 and the stator winding 9 are separated from the motor controller 17 by the partition plate 10. Correspondingly, at the corresponding position on the inner wall of the duct 1 at the rear end of the partition plate 10, a receiving groove matching the shape of the motor controller 17 is opened for accommodating the motor controller 17; and a sealing member is also provided on the partition plate 10, so that a rear-end oil cavity is formed between the sealing member, the partition plate 10, the motor controller 17 and the wall surface of the receiving groove of the duct 1; after the stator core 8, the stator winding 9, the partition plate 10, and the motor controller 17 are integrally embedded into the inner wall of the duct 1, the innermost circle of the assembly formed by the motor controller 17 and the partition plate 10 also forms a smooth and complete inner wall with the inner wall of the duct 1.

[0014] Among them, the number of the oil through-holes 11 is 2, which are respectively located on both sides of the motor controller 17 to realize uniform distribution of the oil liquid inside the rear-end oil cavity.

[0015] Among them, the motor controller 17 includes: a spacer 12, a silicon carbide power module 13, a 26° annular support capacitor 14, a 15° annular circuit board 15, and a 28° annular laminated busbar 16; for the case of a three-phase motor, 12 silicon carbide power modules 13 are arranged in an annular array and installed on the 30° annular spacer 12. The spacer 12 raises the silicon carbide power module 13 to the same height as the support capacitor 14. The laminated busbar 16 is used to connect the silicon carbide power module 13 and the support capacitor 14.

[0016] The spacer 12 is located radially outside the support capacitor 14, near the outer wall of the duct 1; the circuit board 15 is installed on the support capacitor 14, and both the circuit board 15 and the support capacitor 14 are located radially inside the spacer 12, near the inner wall of the duct 1.

[0017] Among them, in the duct 1, the seal is a sealing ring piece formed by axially extending backward along the inner ring of the partition 10. The sealing ring piece seals the rear oil cavity of the motor controller 17 part, and the sealing ring piece fits with the inner wall of the duct 1 to form a smooth and complete inner wall.

[0018] Among them, the seal is realized in the form of heat dissipation ribs. In the duct 1, a circle of heat dissipation ribs 4 is formed by axially extending backward along the inner ring of the partition 10. The axial position of the heat dissipation ribs 4 is behind the propeller 2. The rear oil cavity of the motor controller 17 part is sealed through the bottom surface of the heat dissipation ribs 4. Thus, while forming a seal, a better heat transfer and dissipation effect can be achieved through the material consistency of the heat dissipation ribs and their bases.

[0019] Among them, the permanent magnet 7 of the motor is fixedly installed coaxially with the propeller 2 as a rotating component. The stator core 8 and the stator winding 9 of the motor, as non-rotating components, are both embedded in the inner wall of the duct 1 and are coaxial with the propeller 2. The positions of the stator core 8 and the permanent magnet 7 match each other in the axial direction and have the same axial length. An air gap of the motor is formed between the assembly formed by binding the permanent magnet 7 and the carbon fiber sleeve 6 together and the stator core 8.

[0020] Among them, multiple motor controllers 17 are provided and arranged in an annular array in the space behind the motor inside the duct 1, so as to realize a highly integrated electric ducted propulsion device.

[0021] In addition, the present invention also provides a cooling method for the integrated electric ducted propulsion device. In this cooling method, the motor and the motor controller 17 are immersed in a cooling oil. The cooling oil evenly controls the temperature of the local hottest spots inside the stator winding 9 and the motor controller 17 with other parts, and conducts heat to the inside of the duct 1. Since a circle of heat dissipation ribs 4 is arranged behind the propeller 2 in the duct 1, the cooling oil is heat-exchanged through the propeller slipstream, so as to achieve the purpose of cooling the propulsion device.

[0022] (III) Beneficial effects

[0023] To improve the integration of the land-air mobile platform and the propulsion system of the flying car, and to achieve the lightweight design goal of the propulsion device, the present invention proposes an integrated electric ducted propulsion device and its cooling method. By integrating the design of three components: the duct / propeller, the motor, and the motor controller, and adopting the method of separately integrating the rotating components and the non-rotating components. Specifically: the rotor of the motor is integrally designed with the propeller blade, and the motor stator and the motor controller are designed inside the duct, so as to share the housing. At the same time, through the oil immersion of the motor stator and the motor controller, and the air cooling of the motor rotor, a wind-oil hybrid cooling of the propulsion device is achieved, reducing pipelines and eliminating the internal fuel tank of the mobile platform, thereby realizing the lightweight design of the integrated electric ducted propulsion device.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] (1) The present invention provides an integrated electric ducted propulsion device. By separately integrating the rotating components and the non-rotating components in the propulsion system, the permanent magnet of the motor rotor is integrated with the propeller, and the motor stator and the motor controller are integrated with the duct, sharing the housing, improving the integration degree, and reducing the weight of the propulsion system.

[0026] (2) The present invention provides an integrated electric ducted propulsion device. Since the conventional design places the motor behind the fairing and the diameter of the motor cannot be too large, otherwise it will have a greater impact on the aerodynamic characteristics of the duct / propeller. Through the integrated design of the motor rotor and the propeller structure of the present invention, the rotor diameter can be greatly widened in terms of structure. The performance of the motor such as power and torque has a strong correlation with the motor diameter. Therefore, the integrated design method of the present invention can increase the diameter of the motor in terms of structure, and since it is not installed behind the propeller, the impact on the aerodynamic characteristics of the duct / propeller is very small.

[0027] (3) The present invention provides an integrated electric ducted power device and a cooling method. Conventional flight motors and controllers generally use air cooling or liquid cooling. The air-cooling method has the lowest system complexity. However, for the installation method where the motor is located behind the fairing, the slipstream speed is relatively low, and the heat dissipation effect is not good. In particular, the highest temperature rise point of the motor generally concentrates on the stator winding position, and it is difficult for the air-cooling method to meet the operating requirements of the motor under different working conditions. Liquid cooling involves pipelines, water tanks or fuel tanks, which will bring additional weight to the mobile platform. Sometimes, the weight of the pipelines and the box body is higher than the weight of the motor body. Therefore, in this solution, the motor stator and the controller are cooled by immersion in oil, and the oil is enclosed inside the cavity. Its function is to evenly distribute and take out the temperature inside the motor and the motor controller. At the same time, a circle of heat dissipation ribs is arranged on the inner wall of the duct corresponding to the positions of the motor stator and the controller cavity, and heat exchange is carried out through the propeller slipstream to reduce the oil temperature inside the cavity.

[0028] (4) The controller in the integrated electric ducted power device provided by the present invention can be a multiphase controller. When using a multiphase controller, on the basis of the controller layout method introduced in this embodiment, an array of power modules can be arranged annularly at the partition position. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of an integrated electric ducted power device of the present invention;

[0030] Figure 2 Schematic diagram of the installation of the propeller and permanent magnet of an integrated electric ducted power device of the present invention;

[0031] Figure 3 Schematic diagram of the stator of an integrated electric ducted power device of the present invention;

[0032] Figure 4 Schematic diagram of the motor controller of an integrated electric ducted power device of the present invention;

[0033] Among them, Figure 4 The motor controller shown and Figure 3 The stator shown are respectively located on both sides of the partition;

[0034] Figure 5 Schematic diagram of the bearing position of an integrated electric ducted power device of the present invention;

[0035] Figure 6 Schematic diagram of the heat dissipation rib position of an integrated electric ducted power device of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To make the objectives, contents, and advantages of the present invention clearer, the following further describes in detail the specific embodiments of the present invention with reference to the drawings and embodiments.

[0037] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The accompanying drawings show several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0038] In the description of the embodiments of the present invention, it should be noted that the terms "left", "right", "front", and "back" used herein refer to the orientation with respect to the duct, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance. In the description of the embodiments of the present invention, "a plurality" represents at least two. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "installed", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] As Figure 1 shown, an embodiment of the present application provides an integrated electric ducted power device, including a duct 1, a propeller 2, a support bracket 3, heat dissipation ribs 4, a permanent magnet bracket 5, a carbon fiber sleeve 6, a permanent magnet 7, a stator core 8, a stator winding 9, a partition 10, an oil through hole 11, a spacer 12, a motor controller 17, and a bearing 18. A support bracket 3 is fixed to the inner wall of the duct 1. The support bracket is a "cross" bracket, and the support bracket 3 is located behind the propeller 2;

[0040] A first connection hole is axially formed in the middle of the support bracket 3 along the axis of the duct 1, and a second connection hole is axially formed in the middle of the propeller 2 along the axis of the duct 1. The first connection hole and the second connection hole are both coaxial with the duct 1, and the first connection hole and the second connection hole are connected by a connection shaft; at the first connection hole, the connection shaft is rotatably connected to the support bracket 3 through a bearing 18, so that the propeller 2 can rotate on the support bracket 3, as Figure 5 shown.

[0041] A motor is composed of a stator core 8, a stator winding 9, and a permanent magnet 7. Among them, the stator core 8 and the stator winding 9 are embedded in the inner wall of the duct 1 through a partition 10, and the permanent magnet 7 is fixedly installed on the outer edge of the propeller 2 through a permanent magnet bracket 5.

[0042] The propeller 2, the permanent magnet support 5 and the carbon fiber sleeve 6 are arranged in a coaxially fixed manner. As Figure 2 shown, a ring-shaped permanent magnet support 5 is coaxially fixed to the outer edge of the propeller 2. The permanent magnet support 5 has a certain thickness in the radial direction;

[0043] In the circumferential direction of the permanent magnet support 5, a number of blind-hole-shaped permanent magnet accommodation holes 19 are uniformly formed in a circle from the outer radius to the inner radius. The number and shape of the permanent magnet accommodation holes 19 match those of the permanent magnets 7. The permanent magnets 7 are embedded in the permanent magnet accommodation holes 19. And outside the permanent magnets 7 of the whole circle of the permanent magnet support 5, the permanent magnets 7 are bound by the carbon fiber sleeve 6. Thus, when the propeller 2 rotates, the centrifugal force of the permanent magnets 7 is resisted by the binding of the carbon fiber sleeve 6 to prevent the permanent magnets 7 from flying out or generating large deformations. Among them, the number of the permanent magnet accommodation holes 19 is preferably 40.

[0044] As Figure 3 shown, the permanent magnets 7 of the motor, as rotating components, are coaxially fixedly installed with the propeller 2. The stator core 8 and the stator winding 9 of the motor, as non-rotating components, are both embedded in the inner wall of the duct 1 and are coaxial with the propeller 2. The positions of the stator core 8 and the permanent magnets 7 match each other in the axial direction and have the same axial length. An air gap of the motor is formed between the assembly formed by binding the permanent magnets 7 and the carbon fiber sleeve 6 and the stator core 8;

[0045] The stator core 8 and the stator winding 9 are embedded in the inner wall of the duct 1 through the partition 10. Specifically as follows: The partition 10 is a toroid formed by radially extending along the inner cavity of the duct (1) and is inserted into the inner wall of the duct 1. The radial dimension of the inner ring of the toroid is the same as the corresponding dimension of the inner wall of the duct 1; The stator core 8 and the stator winding 9 are fixedly arranged along the circumference on the front end face of the partition 10. Correspondingly, matching circular groove channels are formed at the corresponding positions on the inner wall of the duct 1 for accommodating the stator core 8 and the stator winding 9. And after the stator core 8, the stator winding 9 and the partition 10 are integrally embedded in the inner wall of the duct 1, the innermost circle of the assembly formed by the stator core 8, the stator winding 9 and the partition 10 forms a smooth and complete inner wall with the inner wall of the duct 1. And a front-end annular oil cavity is formed between the stator core 8, the stator winding 9, the partition 10 and the wall surface of the circular groove channel of the duct 1;

[0046] A motor controller 17 is arranged on the rear end face of the partition plate 10. The stator core 8 and the stator winding 9 are separated from the motor controller 17 by the partition plate 10. Correspondingly, at the corresponding position on the inner wall of the duct 1 at the rear end of the partition plate 10, a receiving channel having a shape matching that of the motor controller 17 is formed for receiving the motor controller 17. Moreover, a sealing member is provided on the partition plate 10, so as to form a rear oil chamber between the sealing member, the partition plate 10, the motor controller 17 and the wall surface of the receiving channel of the duct 1. After the stator core 8, the stator winding 9, the partition plate 10, and the motor controller 17 are integrally embedded into the inner wall of the duct 1, the innermost circle of the assembly formed by the motor controller 17 and the partition plate 10 also forms a smooth and complete inner wall with the inner wall of the duct 1.

[0047] At the installation position of the motor controller 17 on the partition plate 10, an oil through-hole 11 is axially formed in the front-rear direction, so as to communicate the front annular oil chamber with the rear oil chamber to form an integral oil storage chamber, realizing soaking the motor and the motor controller 17 together in the cooling oil for cooling. The number of the oil through-holes 11 is two, which are respectively located on both sides of the motor controller 17 to realize uniform distribution of the oil liquid inside the rear oil chamber.

[0048] As Figure 4 shown, after the motor is removed from behind the duct / propeller, although a part of the space behind the duct / propeller is vacated, the wiring such as the cable between the motor and the motor controller 17 is complex. Therefore, the motor controller needs to be arranged at a position close to the motor. Since a conventional motor controller is generally in a cuboid structure and cannot be installed inside the duct 1 of the present invention, a new controller structure needs to be designed.

[0049] The motor controller 17 of this embodiment is located at the rear end of the partition plate 10 in the duct 1. The motor controller 17 includes: a spacer block 12, a silicon carbide power module 13, a 26° annular support capacitor 14, a 15° annular circuit board 15, and a 28° annular laminated busbar 16. This embodiment is a three-phase motor, and 12 silicon carbide power modules 13 are arranged in an annular array and installed on a 30° annular spacer block 12. The spacer block 12 raises the silicon carbide power module 13 to the same height as the support capacitor 14. The laminated busbar 16 is used to connect the silicon carbide power module 13 and the support capacitor 14. The spacer block 12 is located radially outside the support capacitor 14, close to the outer wall of the duct 1. The circuit board 15 is installed on the support capacitor 14, and the circuit board 15 and the support capacitor 14 are located radially inside the spacer block 12, close to the inner wall of the duct 1.

[0050] In this embodiment, a wind-oil hybrid cooling method is adopted. In the duct 1, the seal is a sealing ring piece formed by axially extending rearward along the inner ring of the partition 10. The rear oil cavity of the motor controller 17 is sealed by the sealing ring piece, and the sealing ring piece fits with the inner wall of the duct 1 to form a smooth and complete inner wall, as Figure 3 , Figure 4 shown.

[0051] Alternatively, the seal is implemented in the form of heat dissipation ribs. In the duct 1, a circle of heat dissipation ribs 4 is formed by axially extending rearward along the inner ring of the partition 10. The axial position of the heat dissipation ribs 4 is behind the propeller 2. The rear oil cavity of the motor controller 17 is sealed through the bottom surface of the heat dissipation ribs 4. Thus, while forming a seal, a better heat transfer and dissipation effect can be achieved through the material consistency of the heat dissipation ribs and their bases.

[0052] When the propeller 2 rotates, high-speed flowing air will be generated at the heat dissipation ribs 4. Heat exchange is carried out by increasing the contact area through the heat dissipation ribs 4, so that the heat generated by the motor and the motor controller 17 is transferred to the heat dissipation ribs 4 through the cooling oil. Due to the soaking effect of the cooling oil, the stator winding 9, which is the hottest part of the motor, can better balance the temperature, and at the same time, efficient heat exchange can be carried out through the heat dissipation ribs 4, as Figure 6 shown.

[0053] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

[0054] In summary, the present invention protects an integrated electric ducted power device. By integrating the design of rotating components and non-rotating components, including the integrated design of non-rotating components such as the motor stator, controller, and duct, and the integrated design of rotating components such as the motor rotor and propeller, are all within the protection scope of the present invention.

[0055] In addition, the present invention also protects a cooling method for an integrated electric ducted power device. The motor and the controller are immersed in the cooling oil, and the cooling oil does not require an external pipeline. Its function is to uniformly control the temperature of the local highest heating point inside the motor stator winding and the controller and other parts, and conduct heat to the inside of the duct. A circle of heat dissipation ribs is arranged behind the propeller on the inner wall of the duct, and the cooling oil is heat-exchanged through the propeller slipstream, so that the cooling method for the power device is all within the protection scope of the present invention.

[0056] Moreover, the present invention also protects an integrated electric ducted power device. When a multi-phase motor is adopted, the motor controller can be arranged in the space behind the motor inside the duct in a circular array form, so that the highly integrated electric ducted power devices are all within the protection scope of the present invention.

[0057] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An integrated electric ducted power device, characterized in that: The device comprises: a duct (1), a propeller (2), a support bracket (3), a permanent magnet bracket (5), a carbon fiber sleeve (6), a permanent magnet (7), a stator core (8), a stator winding (9), a partition (10), and a motor controller (17); A support bracket (3) is fixed to the inner wall of the duct (1), and the propeller (2) is rotatably mounted on the support bracket (3); the support bracket (3) is a "cross" bracket, and is coaxially located behind the propeller (2); The motor is composed of the stator core (8), the stator winding (9), and the permanent magnet (7), wherein the stator core (8) and the stator winding (9) are embedded in the inner wall of the duct (1) via a partition (10), and the permanent magnet (7) is fixedly mounted on the outer edge of the propeller (2) via a circular permanent magnet bracket (5); A circle of permanent magnet receiving holes (19) in the form of a plurality of blind holes is uniformly opened in the circumferential direction of the permanent magnet bracket (5) from the outer diameter to the inner diameter, the permanent magnet (7) is embedded in the permanent magnet receiving hole (19), and the permanent magnet (7) is bound and restrained by a carbon fiber sleeve (6) on the outside of the permanent magnet (7) in the entire circle of the permanent magnet bracket (5); The permanent magnet (7) of the motor is fixedly mounted coaxially with the propeller (2) as a rotating component, and the stator core (8) and stator winding (9) of the motor are embedded in the inner wall of the duct (1) as non-rotating components, coaxially with the propeller (2), the positions of the stator core (8) and the permanent magnet (7) in the axial direction match each other and have the same axial length, and an air gap of the motor is formed between the assembly formed by binding the permanent magnet (7) and the carbon fiber sleeve (6) together and the stator core (8); The stator core (8) and the stator winding (9) are fixedly arranged along the circumference on the front end surface of the partition (10), and a front end annular oil chamber is formed between the stator core (8), the stator winding (9), the partition (10) and the wall surface of the duct (1); a motor controller (17) is arranged on the rear end surface of the partition (10), and the motor controller (17) is also embedded in the inner wall of the duct (1), and a rear end oil chamber is formed between the partition (10), the motor controller (17) and the wall surface of the duct (1); an oil hole (11) is axially opened at the installation position of the motor controller (17) on the partition (10), which passes through the front end annular oil chamber and the rear end oil chamber to form an integrated oil storage chamber.

2. The integrated electric ducted power device according to claim 1, characterized in that: The stator core (8) and the stator winding (9) are embedded in the inner wall of the duct (1) through a partition (10), specifically as follows: the partition (10) is a circular ring body extending radially along the inner cavity of the duct (1), inserted into the inner wall of the duct (1), and the radial size of the inner ring of the circular ring body is consistent with the size of the corresponding position on the inner wall of the duct (1); The stator core (8) and the stator winding (9) are fixedly arranged along the circumference on the front end surface of the partition (10), and correspondingly, a matching annular groove is opened at a corresponding position on the inner wall of the duct (1) to accommodate the stator core (8) and the stator winding (9), and after the stator core (8), the stator winding (9) and the partition (10) are integrally embedded in the inner wall of the duct (1), the innermost circle of the assembly formed by the stator core (8), the stator winding (9) and the partition (10) forms a smooth and complete inner wall with the inner wall of the duct (1), and the front end annular oil chamber is formed between the stator core (8), the stator winding (9), the partition (10) and the wall surface of the annular groove of the duct (1); A motor controller (17) is arranged on the rear end surface of the partition (10); the stator core (8) and the stator winding (9) are separated from the motor controller (17) by the partition (10); correspondingly, a receiving groove having a shape matching the motor controller (17) is opened at a corresponding position on the inner wall of the duct (1) at the rear end of the partition (10) for receiving the motor controller (17); and a sealing member is also arranged on the partition (10), so that a rear end oil chamber is formed between the sealing member, the partition (10), the motor controller (17) and the wall surface of the receiving groove of the duct (1); after the stator core (8), the stator winding (9), the partition (10) and the motor controller (17) are integrally embedded in the inner wall of the duct (1), the innermost circle of the assembly formed by the motor controller (17) and the partition (10) also forms a smooth and complete inner wall with the inner wall of the duct (1); The sealing member is implemented in the form of a heat dissipation rib. In the duct (1), a circle of heat dissipation ribs (4) is formed at the inner ring of the partition (10) and extends axially toward the rear. The axial position of the heat dissipation rib (4) is located behind the propeller (2). The rear end oil cavity of the motor controller (17) is sealed through the base surface of the heat dissipation rib (4). Thus, while forming a seal, better heat transfer and heat dissipation effects can be achieved through the consistency of the materials of the heat dissipation rib and its base.

3. The integrated electric ducted power device according to claim 2, characterized in that: The number of the oil through holes (11) is two, which are respectively located on both sides of the motor controller (17) to achieve uniform distribution of oil inside the rear end oil chamber.

4. The integrated electric ducted power device according to claim 1, characterized in that: The motor controller (17) comprises: a pad (12), a silicon carbide power module (13), a 26° annular support capacitor (14), a 15° annular circuit board (15), and a 28° annular laminated busbar (16); in the case of a three-phase motor, 12 silicon carbide power modules (13) are arranged in a circular array and installed on a 30° annular pad (12); the pad (12) raises the silicon carbide power module (13) to the same height as the support capacitor (14); and the laminated busbar (16) is used to connect the silicon carbide power module (13) and the support capacitor (14); The pad (12) is located radially outside the support capacitor (14) and close to the outer wall of the duct (1); the circuit board (15) is mounted on the support capacitor (14), and the circuit board (15) and the support capacitor (14) are located radially inside the pad (12) and close to the inner wall of the duct (1).

5. The integrated electric ducted power device according to any one of claims 1 to 4, characterized in that: The motor controllers (17) are provided in plurality and are arranged in a ring array in the space behind the motor inside the duct (1), thereby realizing a highly integrated electric duct power device.

6. A cooling method for an integrated electric ducted power unit as claimed in claim 2, characterized in that: The cooling method immerses the motor and the motor controller (17) in cooling oil. The cooling oil evenly controls the temperature of the local highest heating point inside the stator winding (9) and the motor controller (17) and other parts, and conducts heat to the inside of the duct (1). Since a circle of heat dissipation ribs (4) is arranged behind the propeller (2) in the duct (1), the cooling oil is heat-exchanged by the propeller slipstream, thereby achieving the purpose of cooling the power device.

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