High-power permanent magnet generator for electric automobile

Abstract

The invention discloses a high-power permanent magnet generator for an electric automobile, relates to the technical field of permanent magnet generators, and solves the problems that airflow generated by heat dissipation fan blades is relatively dispersed, heat dissipation airflow is difficult to fully move to a permanent magnet material in the permanent magnet generator, and the heat dissipation effect of the permanent magnet generator is poor. The invention discloses a high-power permanent magnet generator for an electric automobile. The high-power permanent magnet generator comprises a generator shell, the power generation box system is mounted on one side of the top of the generator shell; the permanent magnet power generation structure is arranged in the generator shell; the generator shaft rod is arranged on the inner side of the permanent magnet power generation structure and rotationally connected into the generator shell; the displacement heat dissipation mechanism is connected with the generator shaft rod and located on the side face of the power generation box system. According to the invention, when mechanical energy is converted into electric energy for power generation operation, the rotation of the generator shaft rod can also transmit heat dissipation airflow to one side of the permanent magnet power generation structure in a uniformly distributed manner, so that the efficiency of heat dissipation treatment on the permanent magnet power generation structure in an operating state is improved.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet generator technology, specifically a high-power permanent magnet generator for electric vehicles. Background Technology

[0002] A permanent magnet generator is a power generation device that converts mechanical energy, which is converted from thermal energy, into electrical energy. It uses permanent magnets instead of electric current for excitation to generate the main magnetic field. Permanent magnet generators have advantages such as high efficiency, energy saving, low carbon emissions, high power, and small size as automotive motors, and are commonly used in electric vehicles.

[0003] However, this permanent magnet generator has the following drawbacks in practical use: 1. In actual operation, existing permanent magnet generators generate a large amount of heat due to the high power output of the permanent magnets as the generator's internal power increases. This high temperature can cause the permanent magnets to demagnetize, thus affecting the generator's performance. To address this, cooling fans are typically installed inside the generator. The generator's operation drives these fans to dissipate the high-temperature air inside. However, in traditional methods, the airflow generated by the cooling fans is relatively dispersed, making it difficult to effectively deliver cooling airflow to the interior of the permanent magnets, resulting in poor heat dissipation. 2. Existing permanent magnet generators typically employ finned structures inside the generator to cool the high-temperature gases generated during operation via an internal cooling fan. These fins separate dust and other impurities from the airflow. However, traditional finned structures, in order to ensure effective separation of impurities, have relatively large fin thicknesses, which obstruct the airflow path and reduce the efficiency of the airflow reaching the permanent magnet material (permanent magnet) for cooling. Summary of the Invention

[0004] The purpose of this invention is to provide a high-power permanent magnet generator for electric vehicles to solve the problems mentioned in the background art.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: This invention provides a high-power permanent magnet generator for electric vehicles, comprising: a generator housing; a generator box system mounted on one side of the top of the generator housing; a permanent magnet power generation structure disposed inside the generator housing; a generator shaft disposed inside the permanent magnet power generation structure and rotatably connected inside the generator housing; and a displacement heat dissipation mechanism connected to the generator shaft and located on the side of the generator box system. The displacement heat dissipation mechanism includes: a heat dissipation rotating assembly installed on the outside of the generator shaft and located at the bottom of the generator housing; a helical gear connected to the heat dissipation rotating assembly; an intermediate guide gear meshing with the inside of the helical gear; a movable guide wheel movably disposed inside the intermediate guide gear and installed on the outside of the generator shaft; a centrifugal displacement structure connected to the side of the helical gear; and displacement heat dissipation blades installed on the side of the centrifugal displacement structure.

[0006] In a preferred embodiment of the present invention, the generator housing consists of a generator housing and a heat dissipation housing, which are connected by screws. The heat dissipation housing has several heat dissipation through holes at its eccentric bottom. The generator housing contains a permanent magnet power generation structure, a power generation box system is installed on one side of the top of the generator housing, and a heat dissipation rotating assembly is installed inside the heat dissipation housing.

[0007] As a preferred embodiment of the present invention, the permanent magnet power generation structure includes: mounting metal plates installed on both sides inside the generator housing; an outer protective shell installed between the two mounting metal plates; heat dissipation fins disposed inside the outer protective shell; a winding metal plate disposed inside the outer protective shell; a permanent magnet winding disposed inside the winding metal plate; side positioning metal plates installed on the left and right sides of the winding metal plate and positioning the permanent magnet winding; a permanent magnet sleeve disposed inside the winding metal plate; and permanent magnets installed eccentrically inside the permanent magnet sleeve and arranged in a ring at equal intervals. The side positioning metal plate is provided in two parts, and each side positioning metal plate has a reserved groove at its edge that matches the permanent magnet winding.

[0008] In a preferred embodiment of the present invention, sealed bearings are installed on the left and right sides of the assembly metal plate, and a generator shaft is rotatably connected inside the sealed bearings. The generator shaft is installed at the center inside the permanent magnet sleeve. The heat dissipation fins are provided in a plurality of manner, and multiple heat dissipation channels are provided between the mounting metal plate and the inner wall of the generator housing.

[0009] In a preferred embodiment of the present invention, the bottom of the generator shaft is rotatably connected to the middle of the interior of the heat dissipation housing, and a middle cooling fan blade is installed on the outer side of the generator shaft near the heat dissipation housing. The generator shaft has an internal keyway at its top.

[0010] As a preferred embodiment of the present invention, the heat dissipation rotating assembly includes: a side baffle installed inside the heat dissipation housing and located on the side of the intermediate heat dissipation fan blade; airflow vents equidistantly and annularly opened at an eccentric position inside the side baffle; an outer metal sleeve rotatably connected to the center of the side of the side baffle and installed on the outside of the generator shaft; a rotating rod installed on the outside of the outer metal sleeve; a horizontal rotating rod installed inside the rotating rod and movably connected to the annular groove; and a universal ball structure installed on one side of the horizontal rotating rod.

[0011] In a preferred embodiment of the present invention, the annular groove is formed at an eccentric position inside the side baffle, the annular groove is located outside the air vent, an extension rod is installed on the side of the universal ball structure, and a helical gear is installed on the outer side of the extension rod. The side baffle is located on the side of the intermediate guide gear.

[0012] In a preferred embodiment of the present invention, multiple helical gears are provided, all of which are arranged obliquely. A movable rod is mounted on the side of each helical gear, and the movable rod is installed inside an oblique support arm. The oblique support arm is located on the outside of the generator shaft. The inclined support arm is located on the side of the middle guide gear away from the side baffle, and a centrifugal displacement structure is installed at the bottom of the movable rod.

[0013] As a preferred embodiment of the present invention, the centrifugal displacement structure includes: a steering ball joint mounted on the bottom of the movable rod; a displacement guide rail mounted at the center of the steering ball joint; and a displacement slide mounted on the side of the displacement guide rail. The displacement slide block is equipped with displacement heat dissipation blades on its side, which are obliquely arranged. The displacement slide block is movably connected to the steering ball joint.

[0014] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects: 1. In high-power permanent magnet generators used in electric vehicles, when the generator shaft rotates using mechanical energy, causing a change in the internal magnetic field of the permanent magnet power generation structure to generate electrical energy, the rotational force of the generator shaft can also drive a helical gear connected to multiple rotating rods on its outer side to move in a ring around the positioned intermediate guide gear. Through the meshing transmission of the helical gear on the outer side of the intermediate guide gear, the displaced cooling blades connected to the helical gear can rotate. This distributes the cooling airflow transmitted to the generator housing through the intermediate cooling fan blades evenly through multiple air vents in various directions into one side of the permanent magnet power generation structure, providing more concentrated cooling for the internal structure and improving the efficiency of heat dissipation during operation. The displaced cooling blades can simultaneously rotate around their own shaft end and around the generator shaft end, further enhancing the cooling effect. 2. In high-power permanent magnet generators used in electric vehicles, when multiple displacement cooling blades rotate to blow cooling gas into the interior of the permanent magnet generator structure for heat dissipation, the rotating displacement cooling blades can adjust the trajectory and direction of the cooling gas blown by the displacement cooling blades by driving the displacement sliding block and the displacement cooling blades through the displacement guide rail. By the flow of different cooling airflows, the efficiency of convective heat exchange is significantly improved, and heat can be quickly removed and hot air accumulation is avoided, thus achieving efficient heat dissipation. 3. In high-power permanent magnet generators used in electric vehicles, multiple annularly arranged heat dissipation fins are installed on the outer surface of the permanent magnet generator structure. Each fin has protrusions and air passages at different locations. This increases the number of heat dissipation channels for heat transfer, resulting in more efficient heat dissipation. Furthermore, it significantly expands the contact area between the heat dissipation fins and the airflow, accelerating heat movement from the inside to the outside of the fins and improving the effectiveness and efficiency of cooling high-temperature gases. Additionally, it reduces the probability of impurities in the cooling gas entering the permanent magnet generator structure, ensuring safety when generating electricity through magnetic field changes. 4. In high-power permanent magnet generators used in electric vehicles, the permanent magnet windings are assembled and positioned inside the permanent magnet generator structure using side-positioning metal plates. This protects the winding metal plates located inside the assembly metal plates, reducing the probability of damage to the winding metal plates during assembly and actual operation. Simultaneously, it protects the permanent magnet windings, particularly the bent portions at the winding ends, reducing the probability of compression of the permanent magnet windings during assembly and actual operation, ensuring normal current transmission and movement. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0016] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the entire structure of the present invention; Figure 3 This is the present invention. Figure 2 Enlarged structural diagram of region A in the middle; Figure 4 This is a schematic diagram of the overall front cross-section of the present invention; Figure 5 This is a schematic diagram of the permanent magnet power generation structure and the connection between the generator shaft of the present invention; Figure 6 This is a cross-sectional schematic diagram of the permanent magnet power generation structure and the generator shaft connection of the present invention; Figure 7 This is an exploded view of the connection between the heat sink fins and the generator shaft of the present invention; Figure 8 This is a cross-sectional structural schematic diagram of the connection between the generator shaft and the displacement heat dissipation mechanism of the present invention; Figure 9 This is a cross-sectional structural diagram showing the connection between the heat dissipation shell and the displacement heat dissipation mechanism of the present invention; Figure 10 This is a schematic diagram of the connection between the horizontal rotating rod and the intermediate guide gear of the present invention; Figure 11 This is a schematic diagram of the connection between the horizontal rotating rod and the displacement heat dissipation blades of the present invention; Figure 12 This is a schematic diagram of the connection between the movable rod and the displacement heat dissipation blades of the present invention; Figure 13 This is a schematic diagram of the connection between the heat dissipation fins and the outer protective shell of the present invention; Figure 14 This is an exploded view of the heat dissipation fins of the present invention; In the picture: 10. Generator housing; 101. Generator housing; 102. Heat dissipation housing; 20. Generator box system; 30. Permanent magnet power generation structure; 301. Assembly metal plate; 3010. Sealed bearing; 3011. Heat dissipation channel; 302. Outer protective shell; 303. Heat dissipation fins; 304. Winding metal plate; 305. Permanent magnet winding; 306. Side positioning metal plate; 307. Permanent magnet sleeve; 308. Permanent magnet; 40. Generator shaft; 401. Intermediate cooling fan blades; 402. Internal keyway; 50. Displacement heat dissipation mechanism; 501. Heat dissipation rotating assembly; 502. Helical gear; 503. Intermediate guide gear; 504. Movable guide wheel; 505. Centrifugal displacement structure; 506. Displacement heat dissipation blades; 5011, Side baffle; 5012, Air vent; 5013, Outer metal sleeve; 5014, Rotating rod; 5015, Annular groove; 5016, Horizontal rotating rod; 5017, Universal ball structure; 5018, Extension rod; 5021, Movable rod; 5022, Angled support arm; 5051. Steering ball joint; 5052. Displacement guide rail; 5053. Displacement slide block; 60. Metal finned plate; 601. Air passage hole; 602. Protrusion; 603. Horizontal part. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] Example 1 Please see Figures 1-12A high-power permanent magnet generator for electric vehicles includes a generator housing 10; a generator box system 20 mounted on the top side of the generator housing 10; a permanent magnet generator structure 30 disposed inside the generator housing 10; a generator shaft 40 disposed inside the permanent magnet generator structure 30 and rotatably connected inside the generator housing 10; and a displacement heat dissipation mechanism 50 connected to the generator shaft 40 and located on the side of the generator box system 20. The displacement heat dissipation mechanism 50 includes: a heat dissipation rotating assembly 501 mounted on the outside of the generator shaft 40 and located at the bottom of the generator housing 10; a helical gear 502 connected to the heat dissipation rotating assembly 501; an intermediate guide gear 503 meshing with the inside of the helical gear 502; a movable guide wheel 504 movably disposed inside the intermediate guide gear 503 and mounted on the outside of the generator shaft 40; a centrifugal displacement structure 505 connected to the side of the helical gear 502; and displacement heat dissipation blades 506 mounted on the side of the centrifugal displacement structure 505.

[0020] In this design, the generator housing 10 consists of a generator housing 101 and a heat dissipation housing 102. The generator housing 101 and the heat dissipation housing 102 are connected by screws. Several heat dissipation holes are provided at the bottom eccentric of the heat dissipation housing 102. The generator housing 101 is equipped with a permanent magnet power generation structure 30. A power generation box system 20 is installed on one side of the top of the generator housing 101. The heat dissipation housing 102 is equipped with a heat dissipation rotating assembly 501.

[0021] In this design, the bottom of the generator shaft 40 is rotatably connected to the middle of the heat dissipation housing 102. An intermediate heat dissipation fan blade 401 is installed on the outside of the generator shaft 40 near the heat dissipation housing 102. An inner keyway 402 is provided on the top of the generator shaft 40.

[0022] The working principle described above is as follows: Through the design of the permanent magnet power generation structure 30 inside the generator housing 10, electromagnetic induction occurs by generating a change in the magnetic field, which cuts the stator winding, ultimately converting mechanical energy into electrical energy. Specifically, when the generator shaft 40 rotates, it drives the change in the magnetic field inside the permanent magnet power generation structure 30 to generate electrical energy. Simultaneously, it drives the generator shaft 40 to operate, which in turn drives the heat dissipation rotating assembly 501 connected to the generator shaft 40. This allows multiple helical gears 502 connected to the heat dissipation rotating assembly 501 to drive on the outside of the central guide gear 503. This causes the centrifugal displacement structure 505 and the displacement heat dissipation blades 506 connected to the helical gears 502 to rotate, transferring the airflow from the motor's interior to the interior of the permanent magnet power generation structure 30 through channels. This achieves controllable airflow transmission, improving the heat dissipation effect on the high-temperature gas inside the permanent magnet power generation structure 30 during operation. The design of the centrifugal displacement structure 505 can drive the rotating displacement heat dissipation blades 506 to adjust their position, making the incoming heat dissipation airflow stronger and improving the effect of air cooling for the inside of the generator housing 10.

[0023] In this design, the bottom of the generator shaft 40 is rotatably connected to the middle of the heat dissipation housing 102. An intermediate heat dissipation fan blade 401 is installed on the outside of the generator shaft 40 near the heat dissipation housing 102. An inner keyway 402 is provided on the top of the generator shaft 40.

[0024] The generator shaft 40 drives the intermediate cooling fan blades 401 to rotate, thereby transmitting external cooling airflow to the inside of the generator housing 10; the design of the inner keyway 402 facilitates the mechanical equipment to drive the generator shaft 40 to rotate.

[0025] For details, please refer to the following: Figure 5 , Figure 6 and Figure 7 The permanent magnet power generation structure 30 includes: mounting metal plates 301 installed on both sides inside the generator housing 101; an outer protective housing 302 installed between the two mounting metal plates 301; heat dissipation fins 303 disposed inside the outer protective housing 302; a winding metal plate 304 disposed inside the outer protective housing 302; a permanent magnet winding 305 disposed inside the winding metal plate 304; side positioning metal plates 306 installed on the left and right sides of the winding metal plate 304 and positioning the permanent magnet winding 305; a permanent magnet sleeve 307 disposed inside the winding metal plate 304; and permanent magnets 308 disposed at an eccentric position inside the permanent magnet sleeve 307 and arranged in a ring at equal intervals. There are two side positioning metal plates 306, and each side positioning metal plate 306 has a reserved slot at its edge that matches the permanent magnet winding 305.

[0026] In this design, sealed bearings 3010 are installed on the left and right sides of the outer protective shell 302. The generator shaft 40 is rotatably connected inside the sealed bearing 3010. The generator shaft 40 is installed at the center inside the permanent magnet sleeve 307. Several heat dissipation fins 303 are provided. Multiple heat dissipation channels 3011 are left between the mounting metal plate 301 and the inner wall of the generator shell 101.

[0027] In the high-power permanent magnet generator for electric vehicles of the present invention, when the generator shaft 40 rotates, it drives the permanent magnet sleeve 307 mounted on its outer side and the several permanent magnets 308 mounted inside the permanent magnet sleeve 307 to rotate. Through the change of the excitation magnetic field generated by the permanent magnets 308, the permanent magnet winding 305 is cut, generating an electromagnetic induction phenomenon, and generating electrical energy that is transmitted to the electrically connected generator box system 20, realizing the conversion of mechanical energy into electrical energy. The design of the shape and position of the side positioning metal plate 306 can limit and fix the left and right ends of the permanent magnet winding 305, reducing the problem of the permanent magnet winding 305 falling off due to the excitation magnetic field; the several heat dissipation fins 303 cut by the outer protective shell 302 can achieve heat dissipation by transmitting high-temperature gas in multiple directions, improving the effect and efficiency of heat dissipation of high-temperature gas.

[0028] For details, please refer to the following: Figure 8 and Figure 9 The heat dissipation rotating assembly 501 includes: a side baffle 5011 installed inside the heat dissipation housing 102 and located on the side of the middle heat dissipation fan blade 401; a flow vent 5012 equidistantly arranged in annular shape at an eccentric position inside the side baffle 5011; an outer metal sleeve 5013 rotatably connected to the center of the side of the side baffle 5011 and installed on the outside of the generator shaft 40; a rotating rod 5014 installed on the outside of the outer metal sleeve 5013; a horizontal rotating rod 5016 installed inside the rotating rod 5014 and movably connected to the annular groove 5015; and a universal ball structure 5017 installed on one side of the horizontal rotating rod 5016.

[0029] In this design, the annular groove 5015 is opened at the eccentric part inside the side baffle 5011. The annular groove 5015 is located outside the air vent 5012. An extension rod 5018 is installed on the side of the universal ball structure 5017. A helical gear 502 is installed on the outside of the extension rod 5018. The side baffle 5011 is located on the side of the intermediate guide gear 503.

[0030] In the high-power permanent magnet generator for electric vehicles of the present invention, when the intermediate cooling fan blade 401 rotates, it generates a suction force that draws the cooling airflow from the external environment through the air vents 5012 inside the side baffle 5011 to the inner side of the side baffle 5011, and into the space for cooling the permanent magnet generator structure 30. Simultaneously, the generator shaft 40, which drives the intermediate cooling fan blade 401 to rotate, also drives the outer metal sleeve 5013 and the rotating rod 5014 mounted on its outer side to rotate, causing the horizontal rotating rod 5016 mounted inside the rotating rod 5014 to move in a ring within the annular groove 5015. At this time, the ring movement of the horizontal rotating rod 5016 causes the side of the horizontal rotating rod 5016 to rotate synchronously through the universal ball structure 5017 mounted on the horizontal rotating rod 5016, causing the extension rod 5018 mounted at the bottom of the universal ball structure 5017 to rotate.

[0031] For details, please refer to the following: Figure 9 Multiple helical gears 502 are provided, and all helical gears 502 are arranged obliquely. A movable rod 5021 is installed on the side of the helical gear 502. The movable rod 5021 is installed inside the oblique support arm 5022. The oblique support arm 5022 is located on the outside of the generator shaft 40. The oblique support arm 5022 is located on the side of the intermediate guide gear 503 away from the side baffle 5011. A centrifugal displacement structure 505 is installed at the bottom of the movable rod 5021.

[0032] In the high-power permanent magnet generator for electric vehicles of the present invention, the rotation of the extension rod 5018 drives the helical gear 502 mounted on its outer side to mesh with the intermediate guide gear 503. Through this meshing transmission, the helical gear 502 rotates, allowing the movable rod 5021 connected to the intermediate guide gear 503 to rotate, which in turn drives the centrifugal displacement structure 505 connected to the movable rod 5021 to rotate. The design of the helical support arm 5022 ensures that the helical gear 502 is always in a meshing transmission state with the intermediate guide gear 503.

[0033] For details, please refer to the following: Figure 11 and Figure 12 The centrifugal displacement structure 505 includes: a steering ball joint 5051 installed at the bottom of the movable rod 5021; a displacement guide rail 5052 installed at the center inside the steering ball joint 5051; and a displacement slide block 5053 installed on the side of the displacement guide rail 5052. The displacement slide block 5053 is equipped with displacement heat dissipation blades 506 on its side. The displacement heat dissipation blades 506 are obliquely arranged, and the displacement slide block 5053 is movably connected to the steering ball joint 5051.

[0034] In the high-power permanent magnet generator for electric vehicles of the present invention, the rotation of the steering ball cam 5051 causes the side of the steering ball cam 5051 to rotate via the displacement guide rail 5052, which connects to the displacement slide block 5053 and the displacement heat dissipation blade 506. The displacement heat dissipation blade 506 concentrates and disperses the cooling airflow, allowing it to move more concentratedly to one side of the heat dissipation fins 303, thus improving the cooling effect on the power generation structure inside the heat dissipation fins 303. Furthermore, the displacement heat dissipation blade 506 can move along the side of the displacement guide rail 5052, adjusting the direction and precision of the cooling airflow for better heat dissipation.

[0035] Example 2 For details, please refer to the following: Figure 13 and Figure 14 The heat dissipation fin 303 is composed of two metal fin plates 60, which are arranged in a wave shape. Multiple air passage holes 601 are opened inside the two heat dissipation fins 303. Multiple protrusions 602 are provided on the side of the air passage holes 601. Horizontal parts 603 are provided on the side of the protrusions 602, and multiple air passage holes 601 are opened inside the horizontal parts 603.

[0036] In the high-power permanent magnet generator for electric vehicles of the present invention, the design of several protrusions 602 significantly expands the contact area with the cooling airflow, increasing the heat transfer area for dissipating heat from the gas and improving the cooling effect and efficiency of high-temperature gas. Simultaneously, the space between the two cooling fins 303 disrupts the static boundary layer formed on the surface of the cooling airflow, causing disturbance and turbulence in the airflow and accelerating the movement of heat from the inside to the outside of the cooling fins 303. Furthermore, the air passages 601 inside the two cooling fins 303 are not located on vertical or horizontal planes; the bent airflow path further reduces the probability of impurities in the cooling airflow entering the interior of the cooling fins 303, effectively preventing dust accumulation in the permanent magnet generator structure 30 and improving safety during power generation.

[0037] Therefore, any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, should be covered within the protection scope of this invention.

Claims

1. A high-power permanent magnet generator for electric vehicles, characterized in that, Include: The generator shell (10); the power generation box system (20) is installed on one side of the top of the generator shell (10); the permanent magnet power generation structure (30) is arranged in the generator shell (10); The generator shaft (40) is rotatably connected inside the generator shell (10) and arranged inside the permanent magnet power generation structure (30); The variable position heat dissipation mechanism (50) connected with the generator shaft (40) and located on the side of the power generation box system (20), The variable position heat dissipation mechanism (50) comprises: a heat dissipation rotating assembly (501) mounted on the outer side of the generator shaft (40) and located at the bottom of the generator shell (10); The bevel gear (502) connected with the heat dissipation rotating assembly (501); The intermediate guide gear (503) is engagedly connected inside the bevel gear (502); The movable guide wheel (504) is movably arranged inside the intermediate guide gear (503) and mounted on the outer side of the generator shaft (40); The centrifugal variable position structure (505) is connected on the side of the bevel gear (502); The variable position heat dissipation blade (506) is mounted on the side of the centrifugal variable position structure (505).

2. A high-power permanent magnet generator for electric vehicles according to claim 1, characterized in that: The generator shell (10) is composed of a generator shell (101) and a heat dissipation shell (102), the generator shell (101) and the heat dissipation shell (102) are connected by screws, a plurality of heat dissipation through holes are formed in the eccentric bottom of the heat dissipation shell (102), Wherein, the inside of the generator shell (101) is provided with a permanent magnet power generation structure (30), the top of the generator shell (101) is provided with a power generation box system (20), and the inside of the heat dissipation shell (102) is provided with a heat dissipation rotating assembly (501).

3. A high-power permanent magnet generator for electric vehicles according to claim 2, characterized in that: The permanent magnet power generation structure (30) comprises: two assembly metal plates (301) mounted on the inside of the generator shell (101); The outer protective shell (302) is mounted between the two assembly metal plates (301); The heat dissipation fin (303) is arranged inside the outer protective shell (302); The winding metal plate (304) is arranged inside the outer protective shell (302); The permanent magnet winding (305) is arranged inside the winding metal plate (304); The side positioning metal plate (306) is mounted on the left and right sides of the winding metal plate (304) and positions the permanent magnet winding (305); The permanent magnet sleeve (307) is arranged inside the winding metal plate (304); The permanent magnets (308) are mounted in the eccentric position inside the permanent magnet sleeve (307) and arranged in a ring shape at equal intervals, Wherein, the side positioning metal plate (306) is provided with two, and the edge of the two side positioning metal plates (306) is provided with a reserved groove matched with the permanent magnet winding (305).

4. A high-power permanent-magnet generator for an electric vehicle according to claim 3, characterized in that: The left and right sides of the assembly metal plate (301) are provided with sealing bearings (3010), the inside of the sealing bearing (3010) is rotatably connected with the generator shaft (40), and the generator shaft (40) is mounted at the center of the inside of the permanent magnet sleeve (307), The heat dissipation fins (303) are provided with a plurality of heat dissipation channels (3011) between the assembled metal plate (301) and the inner wall of the generator shell (101).

5. A high-power permanent-magnet generator for electric vehicles according to claim 2, characterized in that: The bottom of the generator shaft (40) is rotatably connected to the middle of the heat dissipation shell (102), and the outer side of the generator shaft (40) near the heat dissipation shell (102) is provided with an intermediate heat dissipation fan blade (401), The top of the generator shaft (40) is provided with an inner key groove (402).

6. A high-power permanent-magnet generator for an electric vehicle according to claim 5, characterized in that: The heat dissipation rotating assembly (501) comprises: a side baffle (5011) installed in the heat dissipation shell (102) and located on the side of the intermediate heat dissipation fan blade (401); a flow-through air port (5012) is eccentrically provided in the side baffle (5011); an outer metal sleeve (5013) is rotatably connected to the center of the side of the side baffle (5011) and installed on the outer side of the generator shaft (40); a rotating rod (5014) is installed on the outer side of the outer metal sleeve (5013); a horizontal rotating rod (5016) is installed in the rotating rod (5014) and movably connected with a ring-shaped groove (5015); a universal ball structure (5017) is installed on one side of the horizontal rotating rod (5016).

7. A high-power permanent-magnet generator for an electric vehicle according to claim 6, characterized in that: The ring-shaped groove (5015) is eccentrically provided in the side baffle (5011), and the ring-shaped groove (5015) is located on the outer side of the flow-through air port (5012). The side of the universal ball structure (5017) is provided with an extension rod (5018), and the outer side of the extension rod (5018) is provided with an inclined gear (502), The side baffle (5011) is provided on the side of the intermediate guide gear (503).

8. A high-power permanent-magnet generator for an electric vehicle according to claim 6, characterized in that: The inclined gear (502) is provided with a plurality of inclined gears (502), and the side of the inclined gear (502) is provided with a movable rod (5021), and the movable rod (5021) is installed in the inclined support arm (5022). The inclined support arm (5022) is provided on the outer side of the generator shaft (40), The inclined support arm (5022) is provided on the side of the intermediate guide gear (503) away from the side baffle (5011), and the bottom of the movable rod (5021) is provided with a centrifugal displacement structure (505).

9. A high-power permanent-magnet generator for an electric vehicle according to claim 8, characterized in that: The centrifugal displacement structure (505) comprises: a steering ball convex (5051) installed at the bottom of the movable rod (5021); a displacement guide rail (5052) installed at the center of the steering ball convex (5051); a displacement sliding seat (5053) installed on the side of the displacement guide rail (5052), The side of the displacement sliding seat (5053) is provided with a displacement heat dissipation blade (506), and the displacement heat dissipation blade (506) is inclinedly arranged. The displacement sliding seat (5053) is movably connected with the steering ball convex (5051).

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