High-speed high-power-density transverse flux permanent magnet generator

Abstract

The invention relates to the technical field of permanent magnet generators, and discloses a high-speed high-power-density transverse flux permanent magnet generator which comprises a machine shell assembly, a power generation unit body is arranged in the machine shell assembly, the power generation unit body comprises a stator assembly and a rotor assembly, and the rotor assembly rotates in the stator assembly to achieve power generation; the stator assembly comprises a winding cooling mechanism and a concentrated winding, the winding cooling mechanism comprises a front semi-ring cooling sleeve, a rear semi-ring cooling sleeve, an upper diversion bridge and a lower diversion bridge, the front semi-ring cooling sleeve and the rear semi-ring cooling sleeve are buckled to form a winding cooling ring, and an inner ring flow channel, a mounting ring cavity and an outer ring flow channel which are concentric are formed in the winding cooling ring; the upper diversion bridge and the lower diversion bridge are used for communicating the inner ring flow channel with the outer ring flow channel to form a cooling passage, and the concentrated winding is adaptively arranged in the mounting ring cavity, so that the winding can be directly cooled in the generator, and the contradiction between multi-polarization and high-speed and high-frequency is effectively relieved; the torque density and the rotating speed range of the transverse flux permanent magnet generator can be simultaneously improved.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet generators, in particular 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 size, light weight and high efficiency. Among permanent magnet synchronous generators, transverse flux generator technology is one of the emerging motor body topology technologies in recent years. The plane of the main magnetic flux loop in this type of motor is perpendicular to the direction of motor movement, and the electromagnetic load of the motor is relatively decoupled in space, which can achieve a significant increase in the motor torque density 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-polarization design concept, as the number of pole pairs increases, the alternating fundamental frequency of the magnetic field inside the motor will rise rapidly at the same speed, causing the core loss and winding AC copper loss caused by high-frequency electromagnetic effects to increase rapidly, which in turn causes a sharp increase in heat during operation, seriously affecting the overall heat management and long-term reliable operation of the transverse flux permanent magnet generator. Therefore, the number of pole pairs and the speed are inversely correlated, so the existing transverse flux permanent magnet generator often emphasizes high torque density, rather than reflecting the power density determined by the product of torque and speed. It cannot significantly increase the operating speed of the generator, and has high torque density but no obvious power density advantage. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings 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 of the winding, effectively alleviate the contradiction between multi-polarization and high speed and high frequency in the transverse flux motor technology, and simultaneously improve the torque density and speed range of the transverse flux permanent magnet generator.

[0005] The objective of the present invention is achieved through the following technical solutions: A high-speed, high-power-density transverse flux permanent magnet generator comprises a housing assembly, a rotating shaft is rotatably arranged in the housing assembly, and a power generation unit body, wherein the power generation unit body comprises 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 includes 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 each 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. Concentric inner ring flow channels, mounting ring cavities and outer ring flow channels are formed in the winding cooling ring. The inner ring flow channels, mounting ring cavities and outer ring flow channels are sequentially arranged from the inside to the outside. A liquid inlet is arranged on the outer periphery of the rear half-ring cooling jacket, and the liquid inlet is communicated with the outer ring flow channel. The front half-ring cooling jacket is provided with a liquid inlet. The liquid inlet is connected to the outer ring flow channel. The outer circumference of the sleeve 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 sleeve away from the rear half-ring cooling sleeve, 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 adapted to be arranged in the installation 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, and 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.

[0006] Specifically, 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.

[0007] Specifically, the upper guide bridge and the lower guide bridge are symmetrically arranged on both sides of the winding cooling ring in the radial direction.

[0008] Specifically, two semicircular grooves are processed on 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 buckled together, and the two lead wires of the concentrated winding are respectively arranged in the two wire holes.

[0009] Specifically, the casing assembly includes 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, and 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.

[0010] Specifically, a spiral flow channel is provided between the outer wall and the inner wall of the shell, end covers are connected to both ends of the shell, external cooling holes are provided on the two end covers, and the two external cooling holes are respectively connected to the two ends of the spiral flow channel.

[0011] Specifically, 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 equal intervals and with the same electrical angle.

[0012] Specifically, a three-phase unit is arranged in the housing assembly, and the three-phase unit includes three power generation unit bodies, and 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.

[0013] Specifically, 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.

[0014] The beneficial effects of the present invention are: The high-speed, high-power-density transverse flux permanent magnet generator comprises a casing assembly, a power generation unit body is arranged in the casing assembly, the power generation unit body comprises a stator assembly and a rotor assembly, and the rotor assembly rotates in the stator assembly to realize power generation. The stator assembly includes a winding cooling mechanism, a concentrated winding and a plurality of U-shaped stator cores. The winding cooling mechanism includes a front half-ring cooling sleeve, a rear half-ring cooling sleeve, an upper guide bridge and a lower guide bridge. The front half-ring cooling sleeve and the rear half-ring cooling sleeve are buckled together to form a winding cooling ring. A concentric inner ring flow channel, a mounting ring cavity and an outer ring flow channel are formed in the winding cooling ring. The upper guide bridge and the lower guide bridge are used to connect the inner ring flow channel and the outer ring flow channel to form a cooling passage. The concentrated winding is adapted to be arranged in the mounting ring cavity. After the coolant is injected into the cooling passage, the inside and outside of the concentrated winding can be cooled simultaneously, which can greatly improve the cooling effect, effectively alleviate 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, thereby greatly improving the power density of the transverse flux permanent magnet generator, so that it has the ability to be applied to high speed, high frequency, high electromagnetic load and high power demand scenarios.

[0015] A spiral flow channel is arranged in the casing assembly, and together with the aforementioned winding cooling ring, a double cooling passage design is formed, so that the transverse flux permanent magnet generator can achieve synchronous thermal management, and its overall temperature management is more flexible, which is conducive to a greater improvement in its power density. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a power generation unit in a high-speed and high-power density transverse flux permanent magnet generator of the present invention; Figure 2 for Figure 1 A schematic structural diagram of a stator assembly in a power generation unit body is shown; Figure 3 for Figure 2 A schematic diagram of the split structure of the winding cooling ring in the stator assembly; Figure 4 for Figure 2 A schematic cross-sectional view of a winding cooling ring in the stator assembly; Figure 5 for Figure 1 A schematic diagram of the structure of the rotor core in the power generation unit shown; Figure 6 It 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; Figure 7 for Figure 6 A schematic diagram of the split structure of the housing assembly and the stator assembly in the single-phase embodiment shown; Figure 8 It 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; Fig. 9 for Figure 8 A schematic diagram of the split structure of the three-phase embodiment shown; In the figure, 1-power generation unit body, 2-rotating shaft, 3-casing assembly, 4-concentrated winding, 10-stator assembly, 11-U-shaped stator core, 12-front half ring cooling jacket, 13-rear half ring cooling jacket, 14-upper guide bridge, 15-lower guide bridge, 16-inner ring flow channel, 17-installation ring cavity, 18-outer ring flow 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 DESCRIPTION

[0017] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0018] like Figures 1 to 9 As shown, a high-speed and high-power density transverse flux permanent magnet generator includes a casing assembly 3, in which a rotating shaft 2 and a power generation unit body 1 are arranged, and the rotating shaft 2 is rotatably arranged in the casing assembly 3.

[0019] like Figure 1 As 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 follows Figure 2As shown, it includes a winding cooling mechanism, a concentrated winding 4 and a plurality of U-shaped stator cores 11. The winding cooling mechanism includes a front half ring cooling jacket 12, a rear half ring cooling jacket 13, an upper guide bridge 14 and a lower guide bridge 15. Figure 3 , Figure 4 As shown, one end of the front half-ring cooling jacket 12 and one end of the rear half-ring cooling jacket 13 are both provided with three concentric annular grooves, and the front half-ring cooling jacket 12 and the rear half-ring cooling jacket are buckled and connected to form an integral winding cooling ring, in which a concentric inner ring flow channel 16, a mounting ring cavity 17 and an outer ring flow channel 18 are formed, and the inner ring flow channel 16, the mounting ring cavity 17 and the outer ring flow channel 18 are arranged in sequence from the inside to the outside, and a liquid inlet is arranged on the outer periphery of the rear half-ring cooling jacket 13, and the liquid inlet is connected to the outer ring flow channel 18, and the front half-ring cooling jacket 12 and the rear half-ring cooling jacket 13 are buckled and connected to form an integral winding cooling ring, and a concentric inner ring flow channel 16, a mounting ring cavity 17 and an outer ring flow channel 18 are formed in the winding cooling ring. An outlet is provided on the outer periphery of the semi-annular cooling jacket 12. An upper guide bridge 14 and a lower guide bridge 15 are both installed at one end of the front semi-annular cooling jacket 12 away from the rear semi-annular cooling jacket 13. The upper guide bridge 14 is used to connect the outlet with the inner ring flow channel 16, and the lower guide bridge 15 is used to connect the inner ring flow channel 16 with the outer ring flow channel 18. After the coolant is introduced from the liquid inlet, the coolant first enters the outer ring flow channel 18, and then flows into the inner ring flow channel 16 through the lower guide bridge 15, and then flows to the outlet through the upper guide bridge 14 for discharge. In specific implementation, the upper guide bridge 14 and the lower guide bridge 15 are processed with blind holes on one side close to the front half ring cooling jacket 12, and the end of the front half ring cooling jacket 12 away from the rear half ring cooling jacket 13 is processed with medium holes A, medium holes B, medium holes C, and medium holes D. The two ends of medium hole A are respectively connected to the liquid outlet and the blind hole of the upper guide bridge 14, the two ends of medium hole B are respectively connected to the inner ring flow channel 16 and the blind hole of the upper guide bridge 14, the two ends of medium hole C are respectively connected to the inner ring flow channel 16 and the blind hole of the lower guide bridge 15, and the two ends of medium hole D are respectively connected to the outer ring flow channel 18 and the blind hole of the lower guide bridge 15; the above-mentioned medium holes A, medium holes B, medium holes C, and medium holes D constitute a group of medium communication holes. In actual applications, considering the flowability, multiple groups of the medium flow hole group can be set. In addition, the upper guide bridge 14 and the lower guide bridge 15 are symmetrically arranged on both sides of the radial direction of the winding cooling ring to extend the cooling path.

[0020] like Figure 3 , Figure 4 As shown, the concentrated winding 4 is annular and is adapted to be arranged in the installation ring cavity 17. When installed, the concentrated winding 4 is fitted with each inner wall of the installation ring cavity 17, and the concentrated winding 4 is fully sealed and installed by welding the front half-ring cooling jacket 12 and the rear half-ring cooling jacket 13 after buckling. In specific implementation, two semicircular grooves are processed on the front half-ring cooling jacket 12 and the rear half-ring cooling jacket 13, so that two wire holes 19 are formed when the front half-ring cooling jacket 12 and the rear half-ring cooling jacket 13 are buckled. The two lead wires of the concentrated winding 4 are respectively set in the two wire holes 19 after being set in the sealing tube, so as to achieve fully sealed installation.

[0021] See also 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 along the radial direction of the winding cooling ring and the concentrated winding 4, the winding cooling ring is fixedly arranged in 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, and a plurality of U-shaped stator cores 11 are evenly distributed around the circumference; the rotor assembly 20 includes a rotor core 21, the rotor core 21 is cylindrical, the rotor core 21 is fixedly sleeved on the rotating shaft 2, and a plurality of permanent magnets 22 are evenly distributed around the circumference 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 are respectively opposite to the solid part of the open end of the U-shaped stator core 11, and the number of permanent magnets 22 at each end of the rotor core 21 is twice that of the U-shaped stator core 11.

[0022] The power generation principle of the high-speed, high-power density transverse flux permanent magnet generator is consistent with that of the conventional transverse flux permanent magnet generator, which is to form a rotating magnetic field by driving the permanent magnet 22 to rotate through the rotor core 21, and to generate an induced electromotive force in the concentrated winding 4 under the cutting of the U-shaped stator core 11, which will not be described in detail here. In conventional permanent magnet generators, the cooling system is usually arranged on the housing assembly 3, and the winding is cooled by heat conduction of the stator core. The cooling effect is limited, and the central area of ​​the winding cannot be cooled. When increasing the torque density by increasing the number of pole pairs, it is impossible to achieve high-speed operation. The high-speed and high-power-density transverse flux permanent magnet generator is installed in a narrow space through the power generation unit body 1 designed as above, and the concentrated winding 4 is fully sealed. After the coolant is introduced from the liquid inlet, the concentrated winding 4 can be cooled in a targeted manner. At the same time, the heat conduction between the winding cooling ring and the U-shaped stator core 11 can also be used to cool the inner side (its open end) of the U-shaped stator core 11, thereby 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 simultaneously improving the torque density and speed range of the transverse flux permanent magnet generator, thereby greatly improving the power density of the transverse flux permanent magnet generator, so that it has the ability to be applied to high-speed, high-frequency, high electromagnetic load, and high-power demand scenarios. It should be noted that, macroscopically, when the concentrated winding 4 is cooled, the inside and outside of the concentrated winding 4 are cooled simultaneously to achieve a good cooling effect. In actual applications, the temperature inside the concentrated winding 4 is higher than the temperature outside. Specifically, during the injection of the coolant, the coolant first flows through the outer ring flow channel 18 to perform heat exchange with the outside of the concentrated winding 4. While cooling the outside of the concentrated winding 4, the coolant is also preheated. Then, when flowing through the inner ring flow channel 16, it performs heat exchange with the inside of the concentrated winding 4, thereby making the entire cooling process smoother.

[0023] like Figures 6 to 9As shown, the housing assembly 3 includes a housing, which is in the shape of a hollow cylinder, and a plurality of limiting straight grooves 30 are evenly distributed on the circumference of the inner wall of the housing. The ends of the plurality of U-shaped stator cores 11 away from the winding cooling ring are respectively arranged in the plurality of limiting straight grooves 30, so as to realize the positioning of the stator assembly 10 after the assembly is completed. A spiral flow channel 31 is arranged between the outer wall and the inner wall of the housing (in the implementation, the housing includes an outer cylinder and an inner cylinder which are sleeved together, and the inner wall of the outer cylinder and the outer wall of the inner cylinder are both processed with spiral grooves, thereby forming the spiral flow channel 31), and both ends of the housing are connected to end covers, and both end covers are provided with external cooling holes 33, and the two external cooling holes 33 are respectively connected to the two ends of the spiral flow channel 31. Coolant is injected into one of the outer cooling holes 33, and the coolant is discharged from the other outer cooling hole 33 after flowing through the spiral flow channel 31. The housing assembly 3 can be cooled in the process of the coolant flowing through the spiral flow channel 31. At the same time, the outer side (the closed end) of the U-shaped stator core 11 can be cooled in a targeted manner through heat conduction at the connection between the housing and the U-shaped stator core 11.

[0024] As a result, the casing cooling passage is retained, and a dual cooling passage design is formed with the aforementioned winding cooling ring, so that the transverse flux permanent magnet generator can achieve synchronous thermal management, and its overall temperature management is more flexible, which is conducive to a greater improvement in its power density. Specifically, the casing cooling passage and the winding cooling ring are independent of each other, and are cooled by coolant pumped in from the outside. During the pumping process, the pumping pressure of the two cooling passages can be adjusted separately to optimize the cooling effect.

[0025] Specifically, a plurality of power generation unit bodies 1 are provided, and each power generation unit body 1 is sleeved side by side on the rotating shaft 2 at the same electrical angle and equal intervals, so as to form a high-speed and high-power-density transverse single-phase flux permanent magnet generator.

[0026] Specifically, a three-phase unit is arranged in the housing assembly 3, and the three-phase unit includes three of the above-mentioned power generation unit bodies 1, and the three power generation unit bodies 1 are sleeved side by side on the rotating shaft 2, and the electrical angles of two adjacent power generation unit bodies 1 differ by 120 degrees, thereby forming a three-phase flux permanent magnet generator. Furthermore, a plurality of three-phase units are arranged, and each three-phase unit is sleeved side by side on the rotating shaft 2 at the same electrical angle and at equal intervals, so as to form a high-speed and high-power-density transverse three-phase flux permanent magnet generator.

[0027] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to 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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