Permanent magnet voltage-regulated brushless generator

Abstract

The application discloses a permanent magnet voltage-regulating brushless generator, which comprises a rotor body, a rotating shaft is arranged in the rotor body, two claw poles are symmetrically arranged on the surface of the rotating shaft, and a rotor iron core is arranged between the two claw poles; the rotor iron core comprises a steel cylinder arranged in the rotor body, a plurality of first silicon steel sheet assemblies for copper wire winding are arranged on the outer surface of the steel cylinder around the circumference thereof, and a second silicon steel sheet assembly is slidably arranged in the inner part of the claw pole close to the first silicon steel sheet assembly; the permanent magnet voltage-regulating brushless generator is characterized in that a plurality of first silicon steel sheet assemblies are arranged to form a cylindrical iron core; the silicon steel sheet has high magnetic permeability and can effectively absorb a magnetic field, thereby reducing hysteresis loss and eddy current loss; meanwhile, magnetic domain pieces are arranged on both sides of the rotor; the interaction between the forward magnetic domain piece and the reverse magnetic domain piece not only enhances the interaction force between the magnetic domains, but also improves the average value of the magnetic moment, thereby significantly improving the magnetic permeability.

Description

Technical Field

[0001] This invention relates to the field of generators, and in particular to a permanent magnet brushless generator with voltage regulation. Background Technology

[0002] As the core equipment for converting mechanical energy into electrical energy, the rotor structure and magnetization method in traditional generator design have a significant impact on power generation efficiency, output voltage stability, and equipment maintenance costs. Permanent magnet materials have advantages such as high energy product, high coercivity, and high stability, and can replace traditional excitation windings and brushes to achieve brushless operation. This not only reduces mechanical and excitation losses but also improves the service life and reliability of the generator.

[0003] Traditional generator rotor cores often use a single piece of ferromagnetic material or a simple laminated structure. This design is prone to generating large eddy current losses under the action of a magnetic field, affecting power generation efficiency. At the same time, the traditional rotor magnetization method relies on an external magnetic field, and the magnetization process is relatively fixed, making it difficult to adjust flexibly according to actual needs. This not only limits the adaptability of the generator under different operating conditions, but also causes fluctuations in output voltage due to the uneven distribution of the magnetic field, affecting power quality. Summary of the Invention

[0004] The purpose of this invention is to provide a permanent magnet variable voltage brushless generator to solve the problem mentioned in the background art that the traditional rotor magnetization method relies on an external magnetic field, the magnetization process is relatively fixed, and it is difficult to flexibly adjust it according to actual needs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a permanent magnet brushless generator with adjustable voltage, comprising a rotor body, a rotating shaft installed inside the rotor body, two claw poles symmetrically mounted on the surface of the rotating shaft, a rotor core installed between the two claw poles, the rotor core comprising a steel cylinder installed inside the rotor body, a plurality of first silicon steel sheet assemblies for copper wire winding mounted around the outer surface of the steel cylinder, a second silicon steel sheet assembly slidably mounted inside the claw pole near the first silicon steel sheet assembly, and the second silicon steel sheet assembly inserted inside the first silicon steel sheet assembly, an air cavity is formed between the second silicon steel sheet assembly and the claw pole, a magnetic reaction cavity communicating with the air cavity is formed inside the claw pole, a positive magnetic domain member for elongating and enhancing the magnetic field is installed on the inner top wall of the magnetic reaction cavity, and a negative magnetic domain member for compressing and weakening the magnetic field is slidably mounted inside the magnetic reaction cavity.

[0006] As a preferred embodiment of the present invention, a plurality of first silicon steel sheet assemblies are reinforced by end rings, and a plurality of second silicon steel sheet assemblies are reinforced by side plates. Insulating paper is installed on the surface of both the first and second silicon steel sheet assemblies. An exhaust hole communicating with the outside is provided between the positive magnetic domain component and the negative magnetic domain component, and a breathable sponge is installed inside the exhaust hole.

[0007] As a preferred embodiment of the present invention, the steel cylinder has a cavity inside, and a support mechanism is provided inside the cavity. The support mechanism includes a spiral reinforcing rib installed inside the cavity for reinforcing the copper wire. The cross-section of the spiral reinforcing rib is "S" shaped. A ventilated groove for heat dissipation is provided on the surface of the steel cylinder near the gap of the first silicon steel sheet assembly.

[0008] As a preferred embodiment of the present invention, three ribs are fixedly installed inside the spiral reinforcing rib, and multiple electromagnetic shielding components for shielding the internal magnetic field are installed on the surface of the ribs. The electromagnetic shielding components are respectively installed in the gaps of the spiral reinforcing rib.

[0009] As a preferred embodiment of the present invention, a ventilation mechanism is provided on the shaft near the cavity. The ventilation mechanism includes a ventilation groove formed on the surface of the shaft. The ventilation groove is connected to the cavity and the external space of the rotor body. A heat dissipation vent is formed on the surface of the steel cylinder near the first silicon steel sheet assembly.

[0010] As a preferred embodiment of the present invention, a sealing plate is slidably mounted on the surface of the ventilation slot, and a plurality of inclined ventilation holes are opened on the surface of the sealing plate. The plurality of ventilation holes are connected to the gaps of the spiral reinforcing ribs. The ventilation holes are connected to the outside through the inner cavity of the sealing plate. An electric push rod is mounted on the surface of the rotating shaft, and the free end of the electric push rod is fixedly connected to one end of the sealing plate.

[0011] As a preferred embodiment of the present invention, an auxiliary mechanism is provided inside the sealing plate. The auxiliary mechanism includes a pad installed inside the sealing plate, a spring fixedly installed on the surface of the pad, a pressure plate fixedly installed on the free end of the spring, and a top rod for limiting the spiral slide plate installed at the top of the pressure plate. A long groove is formed on the surface of the rotating shaft near the steel cylinder, and a spiral slide plate is slidably installed inside the long groove. The top rod is inserted inside the spiral slide plate. A first spiral groove is formed at the top of the spiral slide plate, and a slider fixedly installed with a spiral reinforcing rib is slidably installed at the top of the first spiral groove. A second spiral groove is formed on the surface of the steel cylinder near the slider, and the slider is slidably installed inside the second spiral groove.

[0012] As a preferred embodiment of the present invention, two fixing rods for limiting the pressure plate are installed on the surface of the pad, and a sliding sleeve is slidably installed on the surface of the fixing rod, and the sliding sleeve is fixedly installed on one side of the pressure plate.

[0013] As a preferred embodiment of the present invention, a limiting slide plate is slidably installed inside the sealing plate, and a triangular plate for disassembling the top rod is fixedly installed at one end of the limiting slide plate inside the sealing plate, and the triangular plate is located at the top of the pressure plate.

[0014] As a preferred technical solution of the present invention, it further includes a generator housing and a stator body. The stator body and the rotor body are both installed inside the generator housing, and the rotor body is installed inside the stator body. Rotor blades and rotor retaining rings are respectively installed at both ends of the rotor body, and conductive rings are installed on the inner wall of the claw poles near the rotor core.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention uses multiple first silicon steel sheet assemblies to form a cylindrical iron core. The silicon steel sheets have high magnetic permeability, which means that they can absorb magnetic fields more effectively, thereby reducing hysteresis loss and eddy current loss, and helping to improve the efficiency of the motor. At the same time, by inserting second silicon steel sheet assemblies, the density of silicon steel sheets in the rotor iron core is increased. The density of silicon steel sheets has a direct impact on the magnetic properties of the motor. By changing the density of silicon steel sheets, the magnitude of magnetic flux can be adjusted, thereby affecting the efficiency of the motor.

[0017] 2. The present invention installs magnetic domain components on the side of the rotor. This design causes the magnetic moment direction in the magnetic domain to gradually turn towards the direction of the external magnetic field when the magnetic field acts on the rotor, resulting in the rotor being magnetized and exhibiting magnetism. The interaction between the positive and negative magnetic domain components not only enhances the interaction force between the magnetic domains, but also increases the average value of the magnetic moment, thereby significantly improving the permeability and greatly improving the magnetic field efficiency of the generator.

[0018] 3. The spiral reinforcing ribs of this invention can effectively increase the strength and rigidity of the rotor core. When the motor is running, the rotor core will be subjected to various forces, including electromagnetic forces and mechanical stresses. The spiral reinforcing ribs can better resist the action of these forces, prevent the core from deforming or being damaged, thereby improving the overall load-bearing capacity. In addition, an electromagnetic shielding layer is installed in the gaps of the spiral reinforcing ribs, which effectively shields the electromagnetic interference inside the generator and ensures that the generator's output current is stable and pure.

[0019] 4. This invention achieves effective ventilation and heat dissipation inside the generator by setting ventilation slots on the surface of the rotor shaft near the cavity and driving the sealing plate to slide via an electric push rod, thereby adjusting the opening of the ventilation holes. The through holes on the surface of the sealing plate are connected to the gaps of the spiral reinforcing ribs. By repeatedly pulling the sealing plate, the spiral reinforcing ribs can be rotated, thereby improving the airflow effect and ensuring the stable operation of the generator in high-temperature environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the generator housing structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the generator housing of the present invention;

[0022] Figure 3 This is a schematic diagram of the rotor body structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the rotor body of the present invention;

[0024] Figure 5 This is a schematic diagram of the steel cylinder structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the first silicon steel sheet assembly of the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the magnetic reaction cavity of the present invention;

[0027] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point A in the diagram;

[0028] Figure 9 This is a schematic diagram of the spiral reinforcing rib structure of the present invention;

[0029] Figure 10 This is a schematic diagram of the electromagnetic shielding component structure of the present invention;

[0030] Figure 11 This is a schematic diagram of the internal structure of the rotating shaft of the present invention;

[0031] Figure 12 This is a schematic diagram of the spiral sliding plate structure of the present invention;

[0032] Figure 13 This is a schematic diagram of the sealing plate structure of the present invention;

[0033] Figure 14 For the present invention Figure 13 Schematic diagram of the structure at point B in the diagram;

[0034] Figure 15This is a schematic diagram of the triangular plate structure of the present invention.

[0035] In the diagram: 1. Generator housing; 2. Stator body; 3. Rotor body; 31. Rotor fan blades; 32. Conductive ring; 33. Claw pole; 34. Rotor retaining ring; 35. Rotor core; 351. Steel cylinder; 352. Ventilation groove; 353. First silicon steel sheet assembly; 354. Second silicon steel sheet assembly; 355. Magnetic reaction chamber; 356. Forward magnetic domain component; 357. Reverse magnetic domain component; 358. Exhaust vent; 359. Breathable sponge; 3510. Air chamber; 35 11. End ring; 3512. Side plate; 4. Rotating shaft; 5. Support mechanism; 51. Spiral reinforcing rib; 52. Rib plate; 53. Electromagnetic shield; 54. Ventilation mechanism; 541. Ventilation slot; 542. Sealing long plate; 543. Ventilation hole; 544. Electric push rod; 6. Auxiliary mechanism; 61. Limiting slide plate; 62. Top rod; 63. Pressure plate; 64. Spring; 65. Triangular plate; 66. Spiral slide plate; 67. Long slot; 68. Slider; 69. Pad plate. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figure 1-15 The present invention provides a permanent magnet brushless generator including a rotor body 3, a rotating shaft 4 installed inside the rotor body 3, two claw poles 33 symmetrically installed on the surface of the rotating shaft 4, a rotor core 35 installed between the two claw poles 33, and the rotor core 35 including a steel cylinder 351 installed inside the rotor body 3, and a plurality of first silicon steel sheet assemblies 353 for copper wire winding are installed around the outer surface of the steel cylinder 351.

[0038] Among them, the claw poles 33 are usually made of permanent magnet material, which can generate a stable magnetic field. In the generator, these magnetic fields interact with the magnetic field generated by the stator winding, thereby generating electromagnetic induction. The rotor core 35 is the carrier of the permanent magnet. It supports the permanent magnet and keeps it in a fixed position, which helps to ensure the stable distribution of the magnetic field lines, thereby improving the efficiency of the generator.

[0039] Furthermore, a cylindrical rotor core 35 is composed of multiple first silicon steel sheet assemblies 353. The silicon steel sheets have high magnetic permeability, which means that they can absorb magnetic fields more effectively, thereby reducing hysteresis loss. Hysteresis loss is the energy loss generated when a magnetic material is repeatedly magnetized in a magnetic field. Reducing hysteresis loss can significantly improve the efficiency of the motor. At the same time, the silicon steel sheets can form non-conductive areas through the manufacturing process, which also prevents eddy current loss in the rotor core 35. Eddy current loss is the energy loss caused by the induced current generated inside the rotor core 35 when the magnetic field changes in the core. Reducing eddy current loss also helps to improve the efficiency of the motor.

[0040] In the technical solution of this application embodiment, a second silicon steel sheet assembly 354 is slidably installed inside the claw pole 33 near the first silicon steel sheet assembly 353, and the second silicon steel sheet assembly 354 is inserted inside the first silicon steel sheet assembly 353. An air cavity 3510 is opened between the second silicon steel sheet assembly 354 and the claw pole 33. A magnetic reaction cavity 355 communicating with the air cavity 3510 is opened inside the claw pole 33. A positive magnetic domain member 356 for elongating and enhancing the magnetic field is installed on the inner top wall of the magnetic reaction cavity 355. A reverse magnetic domain member 357 for compressing and weakening the magnetic field is slidably installed inside the magnetic reaction cavity 355.

[0041] In this design, when the rotor core 35 is in use, the density of silicon steel sheets in the rotor core 35 can be increased by inserting a second silicon steel sheet assembly 354 into the first silicon steel sheet assembly 353 and controlling the insertion speed. The density of the silicon steel sheets directly affects the magnetic properties of the motor. By changing the density of the silicon steel sheets, the magnitude of the magnetic flux can be adjusted, thereby affecting the efficiency of the motor. Forward magnetic domain components 356 and reverse magnetic domain components 357 are installed on the side of the rotor. This design causes the direction of the magnetic moment within the magnetic domains to gradually change when the magnetic field acts on the rotor. The direction of the external magnetic field causes the rotor to be magnetized and exhibit magnetism. The interaction between the positive magnetic domain 356 and the negative magnetic domain 357 not only enhances the interaction force between the magnetic domains, but also increases the average value of the magnetic moment, thereby significantly improving the magnetic permeability and greatly improving the magnetic field efficiency of the generator. At the same time, the interaction between the positive magnetic domain 356 and the negative magnetic domain 357 will also drive the second silicon steel sheet assembly 354 to overlap with the first silicon steel sheet assembly 353 through air pressure, thereby changing the density of silicon steel sheets in the rotor core 35.

[0042] In other embodiments, multiple first silicon steel sheet assemblies 353 are reinforced by end rings 3511, and multiple second silicon steel sheet assemblies 354 are reinforced by side plates 3512. Insulating paper is installed on the surfaces of the first silicon steel sheet assemblies 353 and the second silicon steel sheet assemblies 354. An exhaust hole 358 communicating with the outside is opened between the forward magnetic domain member 356 and the reverse magnetic domain member 357. A breathable sponge 359 is installed inside the exhaust hole 358.

[0043] Among them, multiple first silicon steel sheet assemblies 353 are reinforced by end rings 3511, and multiple second silicon steel sheet assemblies 354 are reinforced by side plates 3512. This design not only improves the structural strength of the rotor, but also enhances its stability. The installation of insulating paper effectively prevents short circuits between silicon steel sheets, further improving the overall performance of the generator. The exhaust port 358 enables the forward magnetic domain members 356 and the reverse magnetic domain members 357 to move smoothly in repulsion, thereby compressing the space.

[0044] In other embodiments, the steel cylinder 351 has a cavity inside, and a support mechanism 5 is provided inside the cavity. The support mechanism 5 includes a spiral reinforcing rib 51 installed inside the cavity for reinforcing the copper wire. The spiral reinforcing rib 51 has an "S" shaped cross section. A ventilated groove 352 for heat dissipation is provided on the surface of the steel cylinder 351 near the gap of the first silicon steel sheet assembly 353.

[0045] Among them, the spiral reinforcing rib 51 is composed of extended spiral blades, which facilitates air supply. The spiral reinforcing rib 51 can effectively increase the strength and rigidity of the rotor core 35. When the motor is running, the rotor core 35 will be subjected to various forces, including electromagnetic force and mechanical stress. The spiral reinforcing rib 51 can better resist the action of these forces, prevent the rotor core 35 from deforming or being damaged, thereby improving the overall load-bearing capacity.

[0046] In other embodiments, three ribs 52 are fixedly installed inside the spiral reinforcing rib 51, and multiple electromagnetic shielding components 53 for shielding the internal magnetic field are installed on the surface of the ribs 52. The electromagnetic shielding components 53 are respectively installed in the gaps of the spiral reinforcing rib 51.

[0047] An electromagnetic shielding layer is installed in the gap of the spiral reinforcing rib 51. This design effectively shields the electromagnetic interference inside the generator, ensuring that the generator's output current is stable and pure.

[0048] In some other embodiments, a ventilation mechanism 54 is provided near the cavity of the rotating shaft 4. The ventilation mechanism 54 includes a ventilation groove 541 formed on the surface of the rotating shaft 4. The ventilation groove 541 is connected to the cavity and the external space of the rotor body 3 respectively. A ventilated groove 352 for heat dissipation is formed on the surface of the steel cylinder 351 near the first silicon steel sheet assembly 353.

[0049] Among them, by opening a ventilation slot 541 on the surface of the rotating shaft 4 to communicate with the inner cavity of the rotor core 35, when the motor is running, the ventilation slot 541 can promote airflow and remove the heat generated by the rotor core 35 and the rotor winding, thereby maintaining the temperature stability of the motor; the design of the ventilation slot 541 can also reduce the noise of the motor to a certain extent, and at the same time reduce the turbulence and vortex of the airflow on the rotor surface, thereby reducing the noise level.

[0050] In other embodiments, a sealing plate 542 is slidably mounted on the surface of the ventilation slot 541, and a plurality of inclined ventilation holes 543 are opened on the surface of the sealing plate 542. The plurality of ventilation holes 543 are connected to the gap of the spiral reinforcing rib 51. The ventilation holes 543 are connected to the outside through the inner cavity of the sealing plate 542. An electric push rod 544 is mounted on the surface of the rotating shaft 4, and the free end of the electric push rod 544 is fixedly connected to one end of the sealing plate 542.

[0051] The sealing plate 542 is slidable by the electric push rod 544, which in turn adjusts the opening of the ventilation hole 543, thus achieving effective ventilation and heat dissipation inside the generator. The through hole on the surface of the sealing plate 542 is connected to the gap of the spiral reinforcing rib 51. By repeatedly pulling the sealing plate 542, the spiral reinforcing rib 51 can be rotated, thereby improving the air flow effect and ensuring the stable operation of the generator in a high-temperature environment.

[0052] In other embodiments, an auxiliary mechanism 6 is provided inside the sealing plate 542. The auxiliary mechanism 6 includes a pad 69 installed inside the sealing plate 542. A spring 64 is fixedly installed on the surface of the pad 69. A pressure plate 63 is fixedly installed on the free end of the spring 64. A push rod 62 for limiting the spiral slide plate 66 is installed on the top of the pressure plate 63. A long groove 67 is opened on the surface of the rotating shaft 4 near the steel cylinder 351. The spiral slide plate 66 is slidably installed inside the long groove 67, and the push rod 62 is inserted inside the spiral slide plate 66. A first spiral groove is opened on the top of the spiral slide plate 66. A slider 68 fixedly installed with the spiral reinforcing rib 51 is slidably installed on the top of the first spiral groove. A second spiral groove is opened on the surface of the steel cylinder 351 near the slider 68. The slider 68 is slidably installed inside the second spiral groove.

[0053] During the installation of the sealing plate 542, the electric push rod 544 is activated to move the sealing plate 542, causing it to slide inside the ventilation slot 541 until the sealing plate 542 moves the internal push rod 62 into the spiral slide plate 66. This pushes the spiral slide plate 66 to slide and install itself inside the long slot 67. The spiral slide plate 66 causes the slider 68 to slide in the first spiral groove at the top of the spiral slide plate 66. At this time, the slider 68 will move along the second spiral groove, thereby causing the spiral reinforcing rib 51 to rotate, thus improving the airflow effect and ensuring the stable operation of the generator in a high-temperature environment. Furthermore, the spiral slide plate 66 is made of spiral plate material, and both the first and second spiral grooves are spiral grooves.

[0054] In other embodiments, two fixing rods for limiting the pressure plate 63 are mounted on the surface of the pad 69. Sliding sleeves are slidably mounted on the surface of the fixing rods and are fixedly mounted to one side of the pressure plate 63.

[0055] The fixing rod can limit the position of the top rod 62, ensuring that the top rod 62 can be smoothly inserted into the spiral slide plate 66.

[0056] In other embodiments, a limiting slide plate 61 is slidably installed inside the sealing plate 542. A triangular plate 65 for disassembling the top rod 62 is fixedly installed at one end of the limiting slide plate 61 inside the sealing plate 542. The triangular plate 65 is located at the top of the pressure plate 63.

[0057] In this process, by moving the limiting slide plate 61, the limiting slide plate 61 drives the triangular plate 65 to move, and the triangular plate 65 can drive the pressure plate 63 to press down. At this time, the spring 64 is compressed, and the top rod 62 can move into the interior of the sealing long plate 542, thereby facilitating the disassembly of the sealing long plate 542, making maintenance and replacement easier, and improving work efficiency.

[0058] In other embodiments, the generator housing 1 and stator body 2 are also included. The stator body 2 and rotor body 3 are both installed inside the generator housing 1, and the rotor body 3 is installed inside the stator body 2. Rotor fan blades 31 and rotor retaining rings 34 are respectively installed at both ends of the rotor body 3. A conductive ring 32 is installed on the claw pole 33 near the inner wall of the rotor core 35.

[0059] The rotor fan blades 31 are typically used for air circulation inside the generator, ensuring that the internal heat flows in a specified direction and through a designated path, which helps to dissipate heat and maintain a stable operating temperature inside the generator. The rotor retaining ring 34 provides additional support and fixation to ensure that the rotor remains stable when rotating at high speed, thereby ensuring the normal operation of the generator. The conductive ring 32 is typically used in permanent magnet brushless generators to realize the transmission and distribution of current. The conductive ring 32 is installed on the inner wall of the claw pole 33 near the rotor core 35 and is connected to the external circuit through mechanisms such as electromagnetic induction or electronic commutator, thereby realizing the transmission and distribution of current and enabling the brushless generator to operate more efficiently and reliably, while reducing mechanical wear and noise.

[0060] In the description of this invention, only preferred embodiments are described, but the scope of protection of this invention is not limited thereto. 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 scope of protection of this invention.

Claims

1. A permanent magnet brushless generator with voltage regulation, comprising a rotor body (3), characterized in that: The rotor body (3) is equipped with a rotating shaft (4) inside. Two claw poles (33) are symmetrically mounted on the surface of the rotating shaft (4). A rotor core (35) is installed between the two claw poles (33). The rotor core (35) includes a steel cylinder (351) installed inside the rotor body (3). Multiple first silicon steel sheet assemblies (353) for copper wire winding are installed around the outer surface of the steel cylinder (351). The claw pole (33) is slidably mounted with a second silicon steel sheet assembly (354) near the interior of the first silicon steel sheet assembly (353), and the second silicon steel sheet assembly (354) is inserted inside the first silicon steel sheet assembly (353). An air cavity (3510) is provided between the second silicon steel sheet assembly (354) and the claw pole (33). A magnetic reaction cavity (355) communicating with the air cavity (3510) is provided inside the claw pole (33). A positive magnetic domain member (356) for elongating and enhancing the magnetic field is installed on the inner top wall of the magnetic reaction cavity (355). A reverse magnetic domain member (357) for compressing and weakening the magnetic field is slidably mounted inside the magnetic reaction cavity (355).

2. The permanent magnet brushless generator according to claim 1, characterized in that: Multiple first silicon steel sheet assemblies (353) are reinforced by end rings (3511), and multiple second silicon steel sheet assemblies (354) are reinforced by side plates (3512). Insulating paper is installed on the surface of both the first silicon steel sheet assemblies (353) and the second silicon steel sheet assemblies (354). An exhaust hole (358) communicating with the outside is opened between the positive magnetic domain member (356) and the negative magnetic domain member (357). A breathable sponge (359) is installed inside the exhaust hole (358).

3. A permanent magnet brushless generator with voltage regulation according to claim 2, characterized in that: The steel cylinder (351) has an internal cavity, and a support mechanism (5) is provided inside the cavity. The support mechanism (5) includes a spiral reinforcing rib (51) installed inside the cavity for reinforcing the copper wire. The cross-section of the spiral reinforcing rib (51) is "S". A ventilated groove (352) for heat dissipation is provided on the surface of the steel cylinder (351) near the gap of the first silicon steel sheet assembly (353).

4. A permanent magnet brushless generator with voltage regulation according to claim 3, characterized in that: The spiral reinforcing rib (51) has three ribs (52) fixedly installed inside. The surface of the ribs (52) is equipped with multiple electromagnetic shielding components (53) for shielding the internal magnetic field. The multiple electromagnetic shielding components (53) are respectively installed in the gaps of the spiral reinforcing rib (51).

5. A permanent magnet brushless generator according to claim 1, characterized in that: A ventilation mechanism (54) is provided near the cavity of the rotating shaft (4). The ventilation mechanism (54) includes a ventilation slot (541) for ventilation and heat dissipation opened on the surface of the rotating shaft (4). The ventilation slot (541) is connected to the cavity and the external space of the rotor body (3). A ventilated slot (352) for heat dissipation is opened on the surface of the steel cylinder (351) near the first silicon steel sheet assembly (353).

6. A permanent magnet brushless generator according to claim 5, characterized in that: The surface of the ventilation slot (541) is slidably fitted with a sealing plate (542) for reducing interference from external moisture. The surface of the sealing plate (542) is provided with multiple inclined ventilation holes (543). The multiple ventilation holes (543) are connected to the gaps of the spiral reinforcing ribs (51). The ventilation holes (543) are connected to the outside through the inner cavity of the sealing plate (542). The surface of the rotating shaft (4) is fitted with an electric push rod (544). The free end of the electric push rod (544) is fixedly connected to one end of the sealing plate (542).

7. A permanent magnet brushless generator according to claim 6, characterized in that: An auxiliary mechanism (6) is provided inside the sealing long plate (542). The auxiliary mechanism (6) includes a pad (69) installed inside the sealing long plate (542). A spring (64) is fixedly installed on the surface of the pad (69). A pressure plate (63) is fixedly installed on the free end of the spring (64). A top rod (62) for limiting the spiral slide plate (66) is installed on the top of the pressure plate (63). A long groove (67) is opened on the surface of the rotating shaft (4) near the steel cylinder (351). The spiral slide plate (66) is slidably installed inside the long groove (67). The top rod (62) is inserted inside the spiral slide plate (66). A first spiral groove is opened on the top of the spiral slide plate (66). A slider (68) fixedly installed with the spiral reinforcing rib (51) is slidably installed on the top of the first spiral groove. A second spiral groove is opened on the surface of the steel cylinder (351) near the slider (68). The slider (68) is slidably installed inside the second spiral groove.

8. A permanent magnet brushless generator according to claim 7, characterized in that: Two fixing rods for limiting the pressure plate (63) are installed on the surface of the pad (69). Sliding sleeves are slidably installed on the surface of the fixing rods, and the sliding sleeves are fixedly installed on one side of the pressure plate (63).

9. A permanent magnet brushless generator with voltage regulation according to claim 7, characterized in that: The sealing plate (542) is slidably installed inside a limiting slide plate (61). The limiting slide plate (61) is fixedly installed at one end inside the sealing plate (542) with a triangular plate (65) for disassembling the top rod (62). The triangular plate (65) is located at the top of the pressure plate (63).

10. A permanent magnet brushless generator with voltage regulation according to claim 1, characterized in that: It also includes a generator housing (1) and a stator body (2). The stator body (2) and the rotor body (3) are both installed inside the generator housing (1), and the rotor body (3) is installed inside the stator body (2). The rotor body (3) is equipped with rotor fan blades (31) and rotor guard rings (34) at both ends. The claw pole (33) is equipped with a conductive ring (32) near the inner wall of the rotor core (35).

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