Integrated electric duct power device and cooling method thereof

Abstract

The invention belongs to the technical field of green traffic electric vehicles and aircrafts, particularly relates to an integrated electric duct power device and a cooling method thereof, and aims to improve the integration level of an air-ground maneuvering platform and an aerocar propulsion system and achieve the lightweight design target of a propulsion device. The integrated electric duct power device provided by the invention comprises a duct, propellers, a supporting bracket, a permanent magnet bracket, a carbon fiber sleeve, a permanent magnet, a stator iron core, a stator winding, a partition plate and a motor controller, a rotor of a motor and propeller blades are integrally designed, a motor stator and a motor controller are designed into a duct, shell sharing is achieved, meanwhile, through power device air-oil mixed cooling of motor stator and motor controller oil immersion and motor rotor air cooling, pipelines are reduced, an oil tank in a maneuvering platform is omitted, and cost is reduced. And therefore, the design of the light-weight integrated electric duct power device is realized.

Description

Technical Field

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

[0002] As the core and key component of flying cars and amphibious vehicles, the propulsion system's response characteristics, weight, and degree of integration will have a significant impact on the vehicle structure, weight, and volume. The electric propulsion system generally includes components such as ducts / propellers, motors, and controllers. In conventional designs, the motors and controllers are generally installed behind the ducts / propellers. In order to obtain greater thrust, higher-power motors are used. However, the outer diameter of a high-power motor is larger, so installing the motor behind the duct / propeller will have a greater impact on the aerodynamic characteristics of the duct / propeller. In addition, the duct / propeller, motor, and controller are separated from each other, have a low degree of integration, and are relatively heavy. At the same time, since there are many wiring connections between the motor and the controller, the distance between the two components is far, which will result in a very long cable length, which will increase a lot of weight. Summary of the invention

[0003] 1. Technical issues to be resolved The technical problem to be solved by the present invention is: how to propose an integrated electric ducted power device and a cooling method thereof in order to improve the integration of the propulsion system of the land-air mobile platform and the flying car and achieve the lightweight design goal of the propulsion device.

[0004] (II) Technical solution In order to solve the above technical problems, the present invention provides an integrated electric ducted power device, the device comprising: 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, 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 through the partition 10, and the permanent magnet 7 is fixedly mounted on the outer edge of the propeller 2 through the annular permanent magnet bracket 5; A circle of permanent magnet receiving holes 19 in the form of blind holes is evenly opened in the circumferential direction of the permanent magnet bracket 5 from the outer diameter to the inner diameter, and the permanent magnet 7 is embedded in the permanent magnet receiving hole 19. The permanent magnet 7 is bound and restrained by the carbon fiber sleeve 6 on the outer side of the permanent magnet 7 of the permanent magnet bracket 5. 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 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 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 integral oil storage chamber.

[0005] 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 torus extending radially along the inner cavity of the duct 1, inserted in the inner wall of the duct 1, and the radial size of the inner ring of the torus 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 the corresponding position of 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.

[0006] Among them, a motor controller 17 is arranged on the rear end surface of the partition 10, and the stator core 8 and the stator winding 9 are separated from the motor controller 17 by the partition 10. Correspondingly, a accommodating groove with a shape matching the motor controller 17 is opened at the corresponding position of the inner wall of the duct 1 at the rear end of the partition 10 to accommodate the motor controller 17; and a sealing member is also provided on the partition 10, so as to form a rear end oil chamber between the sealing member, the partition 10, the motor controller 17 and the wall surface of the accommodating 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.

[0007] There are two oil holes 11 , which are located on both sides of the motor controller 17 , so as to achieve uniform distribution of oil in the rear end oil chamber.

[0008] The motor controller 17 includes: 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; for a three-phase motor, 12 silicon carbide power modules 13 are arranged in a circular array and installed on a 30° annular pad 12, and 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 supporting capacitor 14, close to the outer wall of the duct 1; the circuit board 15 is installed on the supporting capacitor 14, and the circuit board 15 and the supporting capacitor 14 are located radially inside the pad 12, close to the inner wall of the duct 1.

[0009] Among them, in the duct 1, the sealing member is a sealing ring sheet formed by extending axially backward at the inner ring of the partition 10, and the rear end oil chamber of the motor controller 17 is sealed by the sealing ring sheet. The sealing ring sheet fits with the inner wall of the duct 1 to form a smooth and complete inner wall.

[0010] 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 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. Therefore, while forming a seal, better heat transfer and heat dissipation effects can be achieved through the material consistency of the heat dissipation rib and its base.

[0011] Among them, the permanent magnet 7 of the motor is fixedly installed 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, coaxial with the propeller 2, the positions of the stator core 8 and the permanent magnet 7 in the axial direction match each other and the axial lengths are consistent, 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.

[0012] There are multiple motor controllers 17, which are arranged in a circular array in the space behind the motor inside the duct 1, thereby realizing a highly integrated electric duct power device.

[0013] In addition, the present invention also provides a cooling method for the integrated electric duct power device, wherein the motor and the motor controller 17 are immersed in cooling oil, and the cooling oil uniformly 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 with the propeller slipstream, thereby achieving the purpose of cooling the power device.

[0014] (III) Beneficial effects In order to improve the integration of the propulsion systems of land and air mobile platforms and flying cars and achieve the goal of lightweight design of propulsion devices, the present invention proposes an integrated electric ducted power device and a cooling method thereof, by integrating the three components of the duct / propeller, the motor and the motor controller into an integrated design, and adopting the integrated design of the rotating components and the non-rotating components respectively, specifically: the rotor of the motor and the propeller blades are integrated into the design, and the motor stator and the motor controller are designed into the duct to achieve shell sharing, and at the same time, the motor stator and the motor controller are immersed in oil, and the motor rotor is air-cooled by the power device, which adopts air-oil mixed cooling, reduces pipelines, eliminates the internal oil tank of the mobile platform, and thus realizes the design of a lightweight integrated electric ducted power device.

[0015] Compared with the prior art, the present invention has the following advantages: (1) The present invention provides an integrated electric ducted power unit, which integrates the permanent magnets of the motor rotor with the propeller, and integrates the motor stator and the motor controller with the duct by adopting a method of integrating the rotating parts and the non-rotating parts in the propulsion system separately, so as to realize the sharing of the casing, improve the integration level and reduce the weight of the propulsion system.

[0016] (2) The present invention provides an integrated electric ducted propulsion device. Conventional designs place the motor behind the fairing cap, and the motor diameter cannot be too large, otherwise it will have a significant impact on the aerodynamic characteristics of the ducted propeller. However, the integrated design of the motor rotor and propeller structure of the present invention can greatly widen the rotor diameter in structure. The power, torque and other performance of the motor are strongly correlated with the motor diameter. Therefore, the integrated design method of the present invention can increase the diameter of the motor in structure, and since it is not installed behind the propeller, it has little impact on the aerodynamic characteristics of the ducted propeller.

[0017] (3) The present invention provides an integrated electric ducted power device and cooling method. Conventional flight motors and controllers generally use air cooling or liquid cooling. The air cooling method has the lowest system complexity, but for the installation method where the motor is located behind the fairing cap, the slipstream velocity is low and the heat dissipation effect is poor. In particular, the highest point of motor temperature rise is generally concentrated at the stator winding position. The air cooling method is difficult to meet the motor operation needs under different working conditions. Liquid cooling involves pipelines, water tanks or oil tanks, which will bring additional weight to the mobile platform. Sometimes the weight of the pipelines and the box body will be higher than the weight of the motor body. Therefore, this solution uses oil immersion cooling of the motor stator and controller. The oil is sealed inside the cavity. The function is to even out the temperature inside the motor and the motor controller and bring it out. At the same time, a circle of heat dissipation ribs is arranged on the inner wall of the duct corresponding to the position of the motor stator and controller cavity. Heat is exchanged through the propeller slipstream to reduce the oil temperature inside the cavity.

[0018] (4) The controller in the integrated electric ducted power device provided by the present invention can be a multi-phase controller. When a multi-phase controller is used, the power modules of the array can be arranged in a ring at the position of the partition based on the controller arrangement method introduced in this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an integrated electric ducted power device of the present invention; Figure 2 It is a schematic diagram of the installation of a propeller and a permanent magnet of an integrated electric ducted power device of the present invention; Figure 3 A schematic diagram of a stator of an integrated electric ducted power device of the present invention; Figure 4 A schematic diagram of a motor controller of an integrated electric ducted power device of the present invention; in, Figure 4 The motor controller shown is Figure 3 The stators shown are located on either side of the diaphragm; Figure 5 A schematic diagram of the bearing position of an integrated electric ducted power device of the present invention; Figure 6 The figure is a schematic diagram of the location of the heat dissipation ribs of an integrated electric ducted power device of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0021] In order to facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Attached are 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, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] In the description of the embodiment of the present invention, it should be noted that the terms "left", "right", "front", and "rear" used herein refer to the orientation with respect to the duct, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the embodiment of the present invention, "multiple" represents at least 2. In the description of the embodiment of the present invention, it should also be noted that, unless otherwise clearly specified and limited, if the terms "set", "install", and "connect" appear, 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1 As shown, the embodiment of the present application provides an integrated electric ducted power device, including a duct 1, a propeller 2, a support bracket 3, a heat dissipation rib 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 hole 11, a cushion block 12, a motor controller 17, and a bearing 18. A support bracket 3 is fixed to the inner wall of the duct 1, and the support bracket 3 is a "cross" bracket, and the support bracket 3 is located behind the propeller 2; A first connecting hole is opened in the middle of the support bracket 3 along the axial direction of the duct 1, and a second connecting hole is opened in the middle of the propeller 2 along the axial direction of the duct 1. The first connecting hole and the second connecting hole are coaxial with the duct 1, and the first connecting hole and the second connecting hole are connected by a connecting shaft; the connecting shaft is connected to the support bracket 3 at the first connecting hole through a bearing 18 so that the propeller 2 can rotate on the support bracket 3, such as Figure 5 shown.

[0024] The motor is composed of a stator core 8 , a stator winding 9 , and a permanent magnet 7 , wherein 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 mounted on the outer edge of the propeller 2 through a permanent magnet bracket 5 .

[0025] The propeller 2, the permanent magnet bracket 5 and the carbon fiber sleeve 6 are arranged in a coaxial fixed manner, such as Figure 2 As shown, a circular permanent magnet bracket 5 is coaxially fixed to the outer edge of the propeller 2, and the permanent magnet bracket 5 has a certain thickness in the radial direction; On the circumference of the permanent magnet bracket 5, a circle of permanent magnet receiving holes 19 in the form of a plurality of blind holes are evenly opened from the outer diameter to the inner diameter. The permanent magnet receiving holes 19 match the number and shape of the permanent magnets 7. The permanent magnets 7 are embedded in the permanent magnet receiving holes 19, and the permanent magnets 7 are bound and restrained by the carbon fiber sleeve 6 on the outside of the permanent magnets 7 of the permanent magnet bracket 5. 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 causing large deformation. Among them, the number of the permanent magnet receiving holes 19 is preferably 40.

[0026] like Figure 3 As shown, the permanent magnet 7 of the motor is fixedly installed 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, coaxial 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 the 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 embedded in the inner wall of the duct 1 through the partition 10, specifically as follows: the partition 10 is a circular ring body extending radially along the inner cavity of the duct (1), inserted in 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 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 surface of the partition 10, and correspondingly, a matching circular ring groove is opened at the corresponding position of 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 a front annular oil cavity is formed between the stator core 8, the stator winding 9, the partition 10 and the wall surface of the circular ring groove of the duct 1; A motor controller 17 is arranged on the rear end surface of the partition 10, and 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 that of the motor controller 17 is provided at a corresponding position of the inner wall of the duct 1 at the rear end of the partition 10, so as to accommodate the motor controller 17; and a sealing member is also arranged on the partition 10, so as to form a rear end oil chamber 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; An oil hole 11 is provided on the partition 10 at the installation position of the motor controller 17 along the front-rear axial direction, thereby connecting the front annular oil chamber with the rear oil chamber to form an integral oil storage chamber, so that the motor and the motor controller 17 are immersed in the cooling oil together for cooling. The number of the oil holes 11 is 2, which are respectively located on both sides of the motor controller 17 to achieve uniform distribution of the oil in the rear oil chamber.

[0027] like Figure 4 As shown, after the motor is moved away from the rear of the duct / propeller, although some space is freed up behind the duct / propeller, the wiring of the cables and the like between the motor and the motor controller 17 is complicated, so the motor controller needs to be arranged at a position closer to the motor. Since conventional motor controllers are generally rectangular structures, they cannot be installed inside the duct 1 in the present invention, so a new controller structure needs to be designed.

[0028] The motor controller 17 of this embodiment is located at the rear end of the partition 10 in the duct 1, and the motor controller 17 includes: 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; this embodiment is a three-phase motor, using 12 silicon carbide power modules 13 arranged in a circular array, 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, 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 pad 12, close to the inner wall of the duct 1.

[0029] This embodiment adopts the air-oil mixed cooling method. In the duct 1, the sealing member is a sealing ring sheet formed by extending axially backward at the inner ring of the partition 10. The rear end oil cavity of the motor controller 17 is sealed by the sealing ring sheet. The sealing ring sheet is consistent with the inner wall of the duct 1 to form a smooth and complete inner wall. Figure 3 , Figure 4 shown.

[0030] Alternatively, the seal 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 rearward. The axial position of the heat dissipation rib 4 is located behind the propeller 2. The rear end oil chamber of the motor controller 17 is sealed through the base surface of the heat dissipation rib 4. Therefore, while forming a seal, better heat transfer and heat dissipation effects can be achieved through the material consistency of the heat dissipation rib and its base.

[0031] When the propeller 2 rotates, high-speed air flow is generated at the heat dissipation ribs 4, and the contact area is increased through the heat dissipation ribs 4 for heat exchange, 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 immersion of the cooling oil, the stator winding 9, as the hottest part of the motor, can better balance the temperature, and at the same time, it can also perform efficient heat exchange through the heat dissipation ribs 4, such as Figure 6 shown.

[0032] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

[0033] In summary, the present invention protects an integrated electric ducted power device, which integrates the design of rotating parts and non-rotating parts, including the integrated design of non-rotating parts such as motor stators, controllers, and ducts, and the integrated design of rotating parts such as motor rotors and propellers. All methods are within the protection scope of the present invention.

[0034] In addition, the present invention also protects a cooling method for an integrated electric ducted power device, in which the motor and the controller are immersed in cooling oil. The cooling oil does not require an external pipeline. Its function is to evenly 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 exchanged with heat by the propeller slipstream, so that the method of cooling the power device is within the protection scope of the present invention.

[0035] In addition, the present invention also protects an integrated electric ducted power device. When a multi-phase motor is used, the motor controller can be arranged in the space behind the motor inside the duct in the form of a circular array, thereby realizing a highly integrated electric ducted power device within the protection scope of the present invention.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection 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 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).

3. The integrated electric ducted power device according to claim 2, characterized in that: 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 accommodating 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).

4. The integrated electric ducted power device according to claim 3, 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.

5. 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).

6. The integrated electric ducted power device according to claim 3, characterized in that: In the duct (1), the sealing member is a sealing ring sheet formed by extending axially rearwardly from the inner ring of the partition (10), and the rear end oil chamber of the motor controller (17) is sealed by the sealing ring sheet. The sealing ring sheet is matched with the inner wall of the duct (1) to form a smooth and complete inner wall.

7. The integrated electric ducted power device according to claim 3, characterized in that: 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.

8. The integrated electric ducted power device according to claim 1, characterized in that: 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).

9. The integrated electric ducted power device according to any one of claims 1 to 8, 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.

10. A cooling method for an integrated electric ducted power device as claimed in claim 7, 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.

Images