A high-speed and high-power-density transverse flux permanent magnet generator

Abstract

The present invention relates to the technical field of permanent magnet generators, and discloses a high-speed and high-power-density transverse flux permanent magnet generator, which includes a housing assembly. A power generation unit body is arranged inside the housing assembly. The power generation unit body includes a stator assembly and a rotor assembly. The rotor assembly rotates inside the stator assembly to generate electricity. The stator assembly includes a winding cooling mechanism and concentrated windings. The winding cooling mechanism includes a front half-ring cooling sleeve, a rear half-ring cooling sleeve, an upper diversion bridge and a lower diversion bridge. The front half-ring cooling sleeve and the rear half-ring cooling sleeve are buckled to form a winding cooling ring. A concentric inner circulation channel, an installation ring cavity and an outer circulation channel are formed inside the winding cooling ring. The upper diversion bridge and the lower diversion bridge are used to connect the inner circulation channel and the outer circulation channel into a cooling path. The concentrated windings are adaptively arranged in the installation ring cavity. Thus, the windings can be directly cooled inside the generator, effectively alleviating the contradiction between multi-polarization and high-speed and high-frequency operation, and simultaneously improving the torque density and speed range of the transverse flux permanent magnet generator.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet generators, and particularly to a high-speed and high-power-density transverse flux permanent magnet generator. Background Art

[0002] Permanent magnet synchronous generators have the advantages of simple structure, small volume, light weight, and high efficiency. Among permanent magnet synchronous generators, the transverse flux generator technology is one of the emerging motor body topology technologies in recent years. In this type of motor, the plane where the main magnetic flux circuit is located is perpendicular to the motor movement direction, and the electromagnetic load of the motor is relatively decoupled in space, which can significantly improve the torque density of the motor within a certain range.

[0003] The existing transverse flux permanent magnet generator technology usually increases the torque density of the motor body by increasing the number of pole pairs. However, under this multi-polar design concept, as the number of pole pairs increases, the fundamental frequency of the magnetic field alternation inside the motor at the same rotational speed will increase rapidly, leading to the problem of rapid increase in core loss and winding AC copper loss caused by high-frequency electromagnetic effects. Furthermore, during operation, the heat will increase sharply, seriously affecting the overall heat management and long-term reliable operation of the transverse flux permanent magnet generator. Therefore, the number of pole pairs is inversely related to the rotational speed. Thus, the existing transverse flux permanent magnet generators often emphasize high torque density rather than power density determined by the product of torque and speed, and they cannot significantly increase the operating speed of the generator. Although they have high torque density, the power density advantage is not obvious. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-speed and high-power-density transverse flux permanent magnet generator, which can greatly improve the cooling effect for windings, effectively alleviate the contradiction between multi-polarization and high-speed high-frequency in the transverse flux motor technology, and can simultaneously increase the torque density and speed range of the transverse flux permanent magnet generator.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A high-speed and high-power-density transverse flux permanent magnet generator, including a housing assembly, a rotating shaft rotatably arranged inside the housing assembly, and a power generation unit body, the power generation unit body including a stator assembly and a rotor assembly;

[0007] The stator assembly includes a winding cooling mechanism, a concentrated winding, and several U-shaped stator cores. The winding cooling mechanism includes a front half-ring cooling sleeve, a rear half-ring cooling sleeve, an upper diversion bridge, and a lower diversion bridge. One end of the front half-ring cooling sleeve and one end of the rear half-ring cooling sleeve are both provided with three concentric annular grooves. The front half-ring cooling sleeve and the rear half-ring cooling sleeve are snap-connected to form a winding cooling ring. A concentric inner circulation channel, an installation ring cavity, and an outer circulation channel are formed inside the winding cooling ring. The inner circulation channel, the installation ring cavity, and the outer circulation channel are arranged in sequence from inside to outside. A liquid inlet is provided on the outer circumference of the rear half-ring cooling sleeve, and the liquid inlet is communicated with the outer circulation channel. A liquid outlet is provided on the outer circumference of the front half-ring cooling sleeve. The upper diversion bridge and the lower diversion bridge are both installed at one end of the front half-ring cooling sleeve away from the rear half-ring cooling sleeve. The upper diversion bridge is used to communicate the liquid outlet with the inner circulation channel, and the lower diversion bridge is used to communicate the inner circulation channel with the outer circulation channel. The concentrated winding is in a circular ring shape and is adaptively arranged in the installation ring cavity. The concentrated winding is coaxially arranged with the rotating shaft. The U-shaped stator cores are arranged along the radial direction of the winding cooling ring. The winding cooling ring is fixedly arranged inside the open end of the U-shaped stator core. The other end of the U-shaped stator core is fixedly connected to the housing assembly. Several U-shaped stator cores are circumferentially and evenly distributed;

[0008] The rotor assembly includes a rotor core. The rotor core is in a cylindrical shape and is fixedly sleeved on the rotating shaft. A plurality of permanent magnets are circumferentially and evenly distributed on the outer sides of both ends of the rotor core. The permanent magnets are adapted to the open ends of the U-shaped stator cores.

[0009] Specifically, blind hole cavities are machined on one side of the upper diversion bridge and the lower diversion bridge close to the front half-ring cooling sleeve. Medium holes A, B, C, and D are machined at one end of the front half-ring cooling sleeve away from the rear half-ring cooling sleeve. Both ends of the medium hole A are respectively communicated with the liquid outlet and the blind hole cavity of the upper diversion bridge. Both ends of the medium hole B are respectively communicated with the inner circulation channel and the blind hole cavity of the upper diversion bridge. Both ends of the medium hole C are respectively communicated with the inner circulation channel and the blind hole cavity of the lower diversion bridge. Both ends of the medium hole D are respectively communicated with the outer circulation channel and the blind hole cavity of the lower diversion bridge.

[0010] Specifically, the upper diversion bridge and the lower diversion bridge are symmetrically arranged on both sides in the radial direction of the winding cooling ring.

[0011] Specifically, two semi-circular grooves are machined on both the front half-ring cooling sleeve and the rear half-ring cooling sleeve, so that two wire holes are formed when the front half-ring cooling sleeve and the rear half-ring cooling sleeve are snap-connected. Two lead wires of the concentrated winding are respectively arranged in the two wire holes.

[0012] Specifically, the housing assembly includes a housing. The housing is in the shape of a hollow cylinder. A number of limiting straight grooves are evenly distributed in the circumferential direction of the inner wall of the housing. One ends of a number of U-shaped stator cores away from the winding cooling ring are respectively arranged in the number of limiting straight grooves.

[0013] Specifically, a spiral flow channel is arranged between the outer wall and the inner wall of the housing. End covers are connected to both ends of the housing. Outer cooling holes are arranged on both end covers. The two outer cooling holes are respectively communicated with both ends of the spiral flow channel.

[0014] Specifically, there are a number of power generation unit bodies. The number of power generation unit bodies are sleeved on the rotating shaft side by side at equal intervals with the same electrical angle.

[0015] Specifically, a three-phase unit is arranged in the housing assembly. The three-phase unit includes three power generation unit bodies. The three power generation unit bodies are sleeved on the rotating shaft side by side. The electrical angle between two adjacent power generation unit bodies differs by 120 degrees.

[0016] Specifically, there are a number of three-phase units. The number of three-phase units are sleeved on the rotating shaft side by side at equal intervals with the same electrical angle.

[0017] The beneficial effects of the present invention are as follows:

[0018] The high-speed and high-power-density transverse flux permanent magnet generator includes a housing assembly. A power generation unit body is arranged in the housing assembly. The power generation unit body includes a stator assembly and a rotor assembly. The rotor assembly rotates in the stator assembly to generate electricity. The stator assembly includes a winding cooling mechanism, a concentrated winding, and a number of U-shaped stator cores. The winding cooling mechanism includes a front half-ring cooling sleeve, a rear half-ring cooling sleeve, an upper diversion bridge, and a lower diversion bridge. The front half-ring cooling sleeve and the rear half-ring cooling sleeve are buckled to form a winding cooling ring. A concentric inner circulation channel, an installation ring cavity, and an outer circulation channel are formed in the winding cooling ring. The upper diversion bridge and the lower diversion bridge are used to connect the inner circulation channel and the outer circulation channel into a cooling path. The concentrated winding is adaptively arranged in the installation ring cavity. After injecting coolant into the cooling path, the inner and outer sides of the concentrated winding can be cooled simultaneously, which can greatly improve the cooling effect, effectively relieve the contradiction between multi-polarization and high-speed high-frequency in the transverse flux motor technology, can simultaneously improve the torque density and speed range of the transverse flux permanent magnet generator, realize a great increase in the power density of the transverse flux permanent magnet generator, and enable it to have the ability to be applied to scenarios with high speed, high frequency, high electromagnetic load, and high power demand.

[0019] A spiral flow channel is arranged in the housing assembly, which constitutes a design of a double cooling path with the aforementioned winding cooling ring, enabling the transverse flux permanent magnet generator to achieve synchronous thermal management, making its overall temperature management more flexible, and being conducive to a greater increase in its power density. Description of the Drawings

[0020] Figure 1 This is a schematic structural diagram of a power generation unit body in a high-speed and high-power-density transverse flux permanent magnet generator of the present invention;

[0021] Figure 2 is Figure 1 a schematic structural diagram of a stator assembly in the power generation unit body shown;

[0022] Figure 3 is Figure 2 a schematic split structure diagram of a winding cooling ring in the stator assembly;

[0023] Figure 4 is Figure 2 a schematic cross-sectional structure diagram of a winding cooling ring in the stator assembly;

[0024] Figure 5 is Figure 1 a schematic structural diagram of a rotor core in the power generation unit body shown;

[0025] Figure 6 This is a schematic structural diagram of a single-phase embodiment of a high-speed and high-power-density transverse flux permanent magnet generator of the present invention;

[0026] Figure 7 is Figure 6 a schematic split structure diagram of a machine housing assembly and a stator assembly in the single-phase embodiment shown;

[0027] Figure 8 This is a schematic structural diagram of a three-phase embodiment of a high-speed and high-power-density transverse flux permanent magnet generator of the present invention;

[0028] Figure 9 is Figure 8 a schematic split structure diagram of the three-phase embodiment shown;

[0029] In the figure, 1 - power generation unit body, 2 - rotating shaft, 3 - machine housing assembly, 4 - concentrated winding, 10 - stator assembly, 11 - U-shaped stator core, 12 - front half-ring cooling sleeve, 13 - rear half-ring cooling sleeve, 14 - upper diversion bridge, 15 - lower diversion bridge, 16 - inner circulation channel, 17 - installation ring cavity, 18 - outer circulation channel, 19 - wire hole, 20 - rotor assembly, 21 - rotor core, 22 - permanent magnet, 30 - limiting straight groove, 31 - spiral flow channel, 32 - end cover, 33 - external cooling hole. Detailed implementation manners

[0030] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0031] As Figures 1 to 9As shown in the figure, a high-speed and high-power-density transverse flux permanent magnet generator includes a housing assembly 3. Inside the housing assembly 3, a rotating shaft 2 and a power generation unit body 1 are provided, and the rotating shaft 2 is rotatably arranged inside the housing assembly 3.

[0032] As Figure 1 shown, the power generation unit body 1 includes a stator assembly 10 and a rotor assembly 20. The structure of the stator assembly 10 is as Figure 2 shown, which includes a winding cooling mechanism, a concentrated winding 4, and several U-shaped stator cores 11. The winding cooling mechanism includes a front half-ring cooling sleeve 12, a rear half-ring cooling sleeve 13, an upper diversion bridge 14, and a lower diversion bridge 15. As Figure 3 , Figure 4 shown, one end of the front half-ring cooling sleeve 12 and one end of the rear half-ring cooling sleeve 13 are both provided with three concentric annular grooves. The front half-ring cooling sleeve 12 and the rear half-ring cooling sleeve are buckled and connected to form an integral winding cooling ring. Inside this winding cooling ring, concentric inner flow channels 16, installation ring cavities 17, and outer flow channels 18 are formed. The inner flow channels 16, installation ring cavities 17, and outer flow channels 18 are arranged in sequence from inside to outside. A liquid inlet is provided on the outer periphery of the rear half-ring cooling sleeve 13, and the liquid inlet is communicated with the outer flow channel 18. An outlet is provided on the outer periphery of the front half-ring cooling sleeve 12. The upper diversion bridge 14 and the lower diversion bridge 15 are both installed at one end of the front half-ring cooling sleeve 12 away from the rear half-ring cooling sleeve 13. The upper diversion bridge 14 is used to communicate the outlet with the inner flow channel 16, and the lower diversion bridge 15 is used to communicate the inner flow channel 16 with the outer flow channel 18. After the coolant is introduced from the liquid inlet, the coolant first enters the outer flow channel 18, then flows into the inner flow channel 16 through the lower diversion bridge 15, and then flows to the outlet through the upper diversion bridge 14 and is discharged. Specifically in implementation, blind hole cavities are processed on one side of the upper diversion bridge 14 and the lower diversion bridge 15 close to the front half-ring cooling sleeve 12. On one end of the front half-ring cooling sleeve 12 away from the rear half-ring cooling sleeve 13, a medium hole A, a medium hole B, a medium hole C, and a medium hole D are processed. The two ends of the medium hole A are respectively communicated with the outlet and the blind hole cavity of the upper diversion bridge 14. The two ends of the medium hole B are respectively communicated with the inner flow channel 16 and the blind hole cavity of the upper diversion bridge 14. The two ends of the medium hole C are respectively communicated with the inner flow channel 16 and the blind hole cavity of the lower diversion bridge 15. The two ends of the medium hole D are respectively communicated with the outer flow channel 18 and the blind hole cavity of the lower diversion bridge 15. The above-mentioned medium hole A, medium hole B, medium hole C, and medium hole D form a group of medium communication hole groups. In actual application, considering the fluidity, multiple groups of this medium flow hole group can be set. In addition, the upper diversion bridge 14 and the lower diversion bridge 15 are symmetrically arranged on both sides in the radial direction of the winding cooling ring to extend the cooling path.

[0033] As Figure 3 , Figure 4As shown, the concentrated winding 4 is in a circular ring shape and is adaptively arranged in the mounting ring cavity 17. During installation, the concentrated winding 4 fits against the inner walls of the mounting ring cavity 17. The full - package sealed installation of the concentrated winding 4 is achieved by the form of buckling and welding the front - half ring cooling sleeve 12 and the rear - half ring cooling sleeve 13. During specific implementation, two semi - circular grooves are machined on both the front - half ring cooling sleeve 12 and the rear - half ring cooling sleeve 13, so that two wire holes 19 are formed when the front - half ring cooling sleeve 12 and the rear - half ring cooling sleeve 13 are buckled. After the two lead - out wires of the concentrated winding 4 are sleeved with sealing tubes, they are respectively arranged in the two wire holes 19 to achieve the full - package sealed installation.

[0034] See Figure 2 、 Figures 5 to 9 As shown, the concentrated winding 4 is coaxially arranged with the rotating shaft 2. The U - shaped stator core 11 is arranged radially along the winding cooling ring and the concentrated winding 4. The winding cooling ring is fixedly arranged inside the open end of the U - shaped stator core 11. The other end of the U - shaped stator core 11 is fixedly connected to the housing assembly 3. A number of U - shaped stator cores 11 are arranged circumferentially and uniformly; the rotor assembly 20 includes a rotor core 21. The rotor core 21 is in a cylindrical shape and is fixedly sleeved on the rotating shaft 2. A number of permanent magnets 22 are circumferentially and uniformly arranged on the outer sides of both ends of the rotor core 21. The permanent magnets 22 are adapted to the open end of the U - shaped stator core 11, so that the permanent magnets 22 at both ends of the rotor core 21 respectively face the solid parts of the open end of the U - shaped stator core 11. The number of permanent magnets 22 at each end of the rotor core 21 is twice that of the U - shaped stator core 11.

[0035] The power generation principle of this high-speed and high-power-density transverse flux permanent magnet generator is the same as that of a conventional transverse flux permanent magnet generator. That is, the rotor core 21 drives the permanent magnet 22 to rotate to form a rotating magnetic field, and an induced electromotive force is generated in the concentrated winding 4 under the cutting of the U-shaped stator core 11. There is no need to elaborate here. In a conventional permanent magnet generator, its cooling system is usually arranged on the housing assembly 3, and the cooling of the winding is achieved through the heat conduction of the stator core. Its cooling effect is limited and it cannot cool the central area of the winding. When increasing the torque density by increasing the number of pole pairs, it is impossible to achieve high-speed operation at the same time. This high-speed and high-power-density transverse flux permanent magnet generator realizes the installation in a narrow space through the power generation unit body 1 designed above, seals and completely wraps the concentrated winding 4. After injecting the coolant from the liquid inlet, it can specifically cool the concentrated winding 4. At the same time, through the heat conduction of the connection part between the winding cooling ring and the U-shaped stator core 11, it can also specifically cool the inner side (the open end) of the U-shaped stator core 11, greatly improving the cooling effect, effectively alleviating the contradiction between multi-polarization and high-speed and high-frequency in the transverse flux motor technology, and can simultaneously improve the torque density and speed range of the transverse flux permanent magnet generator, realizing a great increase in the power density of the transverse flux permanent magnet generator, making it capable of being applied to scenarios with high speed, high frequency, high electromagnetic load, and high power requirements. It should be noted that macroscopically, when cooling the concentrated winding 4, both the inner and outer sides of the concentrated winding 4 are cooled simultaneously to achieve a good cooling effect. However, in actual application, the temperature inside the concentrated winding 4 is higher than that outside. Specifically, during the process of injecting the coolant, the coolant first flows through the outer annular flow channel 18 to exchange heat with the outer side of the concentrated winding 4, preheating the coolant while cooling the outer side of the concentrated winding 4. Then, when it flows through the inner annular flow channel 16, it exchanges heat with the inner side of the concentrated winding 4, making the entire cooling process smoother.

[0036] As Figures 6 to 9 shown, the above-mentioned housing assembly 3 includes a housing. The housing is in the shape of a hollow cylinder. A number of limiting straight grooves 30 are evenly distributed on the inner wall circumference of the housing. One end of each of the several U-shaped stator cores 11 far from the winding cooling ring is respectively arranged in the several limiting straight grooves 30 to realize the positioning of the stator assembly 10 after assembly. A spiral flow channel 31 is arranged between the outer wall and the inner wall of the housing (in implementation, the housing includes an outer cylinder and an inner cylinder sleeved together, and spiral grooves are processed on the inner wall of the outer cylinder and the outer wall of the inner cylinder, thus forming this spiral flow channel 31). End caps are connected to both ends of the housing, and external cooling holes 33 are arranged on both end caps. The two external cooling holes 33 are respectively communicated with both ends of the spiral flow channel 31. Injecting coolant into one of the external cooling holes 33, the coolant flows through the spiral flow channel 31 and then discharges from the other external cooling hole 33. During the process of the coolant flowing through the spiral flow channel 31, it can cool the housing assembly 3, and at the same time, through the heat conduction of the connection part between the housing and the U-shaped stator core 11, it can also specifically cool the outer side (the closed end) of the U-shaped stator core 11.

[0037] Thus, the housing cooling passage is retained, and together with the aforementioned winding cooling ring, a dual-cooling passage design is formed, enabling the transverse flux permanent magnet generator to achieve synchronous thermal management, making its overall temperature management more flexible and conducive to a greater increase in its power density. Specifically, the housing cooling passage and the winding cooling ring are independent of each other and are cooled by the coolant pumped in from the outside respectively. During the pumping process, the pumping pressure of the two cooling passages can be adjusted separately to optimize the cooling effect.

[0038] Specifically, a plurality of power generation unit bodies 1 are provided. Each power generation unit body 1 is sleeved on the rotating shaft 2 side by side at equal intervals with the same electrical angle, and a high-speed and high-power-density transverse single-phase flux permanent magnet generator can be formed.

[0039] Specifically, a three-phase unit is arranged in the housing assembly 3. The three-phase unit includes three of the above-mentioned power generation unit bodies 1. The three power generation unit bodies 1 are sleeved on the rotating shaft 2 side by side, and the electrical angle between two adjacent power generation unit bodies 1 differs by 120 degrees, thereby forming a three-phase flux permanent magnet generator. Further, a plurality of three-phase units are provided. Each three-phase unit is sleeved on the rotating shaft 2 side by side at equal intervals with the same electrical angle, and a high-speed and high-power-density transverse three-phase flux permanent magnet generator can be formed.

[0040] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A high-speed, high-power-density transverse flux permanent magnet generator, comprising a housing assembly, wherein a rotating shaft is rotatably arranged in the housing assembly, characterized in that: Also included is a power generation unit body, the power generation unit body includes a stator assembly and a rotor assembly; The stator assembly includes a winding cooling mechanism, a concentrated winding and a plurality of U-shaped stator cores. The winding cooling mechanism comprises a front half-ring cooling jacket, a rear half-ring cooling jacket, an upper guide bridge and a lower guide bridge, one end of the front half-ring cooling jacket and one end of the rear half-ring cooling jacket are both provided with three concentric annular grooves, the front half-ring cooling jacket and the rear half-ring cooling jacket are buckled and connected to form a winding cooling ring, and a concentric inner ring flow channel, a mounting ring cavity and an outer ring flow channel are formed in the winding cooling ring, and the inner ring flow channel, the mounting ring cavity and the outer ring flow channel are arranged in sequence from the inside to the outside, The outer periphery of the rear half-ring cooling jacket is provided with a liquid inlet, the liquid inlet is communicated with the outer ring flow channel, the outer periphery of the front half-ring cooling jacket is provided with a liquid outlet, the upper guide bridge and the lower guide bridge are both installed at one end of the front half-ring cooling jacket away from the rear half-ring cooling jacket, the upper guide bridge is used to connect the liquid outlet with the inner ring flow channel, and the lower guide bridge is used to connect the inner ring flow channel with the outer ring flow channel. The concentrated winding is annular and is adapted to be arranged in the mounting ring cavity. The concentrated winding is coaxially arranged with the rotating shaft. The U-shaped stator core is arranged along the radial direction of the winding cooling ring. The winding cooling ring is fixedly arranged in the open end of the U-shaped stator core. The other end of the U-shaped stator core is fixedly connected to the housing assembly. A plurality of the U-shaped stator cores are evenly distributed around the circumference. The rotor assembly comprises a rotor core, which is cylindrical and fixedly sleeved on the rotating shaft. A plurality of permanent magnets are evenly distributed on the outer sides of both ends of the rotor core, and the permanent magnets are matched with the open ends of the U-shaped stator core.

2. A high-speed, high-power-density transverse flux permanent magnet generator according to claim 1, characterized in that: The upper guide bridge and the lower guide bridge are both processed with blind holes on one side close to the front half-ring cooling jacket, and the end of the front half-ring cooling jacket away from the rear half-ring cooling jacket is processed with medium holes A, medium holes B, medium holes C, and medium holes D. The two ends of the medium hole A are respectively connected to the liquid outlet and the blind hole of the upper guide bridge, the two ends of the medium hole B are respectively connected to the inner ring flow channel and the blind hole of the upper guide bridge, the two ends of the medium hole C are respectively connected to the inner ring flow channel and the blind hole of the lower guide bridge, and the two ends of the medium hole D are respectively connected to the outer ring flow channel and the blind hole of the lower guide bridge.

3. A high-speed, high-power-density transverse flux permanent magnet generator according to claim 1, characterized in that: The upper guide bridge and the lower guide bridge are symmetrically arranged on both sides of the winding cooling ring in the radial direction.

4. A high-speed, high-power-density transverse flux permanent magnet generator according to claim 1, characterized in that: The front half-ring cooling sleeve and the rear half-ring cooling sleeve are both processed with two semicircular grooves, so that two wire holes are formed when the front half-ring cooling sleeve and the rear half-ring cooling sleeve are buckled together, and the two lead wires of the concentrated winding are respectively arranged in the two wire holes.

5. The high-speed and high-power density transverse flux permanent magnet generator according to claim 1, characterized in that: The housing assembly comprises a shell, which is in the shape of a hollow cylinder. A plurality of limiting straight grooves are evenly distributed on the circumference of the inner wall of the shell. The ends of a plurality of U-shaped stator cores away from the winding cooling ring are respectively arranged in the plurality of limiting straight grooves.

6. A high-speed, high-power-density transverse flux permanent magnet generator according to claim 5, characterized in that: A spiral flow channel is arranged between the outer wall and the inner wall of the shell, and end covers are connected to both ends of the shell. External cooling holes are arranged on the two end covers, and the two external cooling holes are respectively connected to the two ends of the spiral flow channel.

7. A high-speed, high-power-density transverse flux permanent magnet generator according to any one of claims 1 to 6, characterized in that: There are a plurality of power generation unit bodies, and the plurality of power generation unit bodies are sleeved side by side on the rotating shaft at the same electrical angle and at equal intervals.

8. A high-speed, high-power-density transverse flux permanent magnet generator according to any one of claims 1 to 6, characterized in that: A three-phase unit is arranged in the housing assembly, and the three-phase unit includes three power generation unit bodies. The three power generation unit bodies are sleeved side by side on the rotating shaft, and the electrical angles of two adjacent power generation unit bodies differ by 120 degrees.

9. A high-speed, high-power-density transverse flux permanent magnet generator according to claim 8, characterized in that: There are a plurality of three-phase units, and the three-phase units are arranged side by side on the rotating shaft at the same electrical angle and at equal intervals.

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