Magnetic pole structure of fan direct-driven generator rotor

Abstract

The utility model provides a magnetic pole structure of a fan direct-driven generator rotor, which relates to the technical field of direct-driven generators and comprises a rotating shaft, a main rotor base and an auxiliary rotor base are fixed outside the rotating shaft, a mounting seat is arranged between the main rotor base and the auxiliary rotor base, a groove is arranged on the outer wall of the mounting seat, and a magnetic pole is arranged in the groove. A magnetic pole block is arranged in the groove, the top of the magnetic pole block is in a circular arc shape, and threaded holes are formed in the positions, close to the groove, of the front surface and the rear surface of the mounting base. Compared with the prior art, through the arrangement of the magnetic pole block, the top edge of the magnetic pole block is arc-shaped, a magnetic field generated by the arc-shaped magnetic pole block is smoother and more regular, the operation efficiency and the electric energy quality of the generator are improved, the effective area of the magnetic pole can be increased through the design of the arc-shaped magnetic pole block, more magnetic lines pass through air gaps, and the generator efficiency is improved. Therefore, the magnetic flux is improved, and finally the torque output of the generator is improved.

Description

Technical Field

[0001] This utility model relates to the field of direct-drive generator technology, and in particular to a magnetic pole structure of a wind turbine direct-drive generator rotor. Background Technology

[0002] A direct-drive generator is a power generation device that converts mechanical energy into electrical energy directly without the need for a traditional gearbox. Direct-drive generators are widely used in the field of wind power generation. Their core feature is that by eliminating intermediate transmission components (such as gearboxes), the wind turbine or power source is directly connected to the generator, thereby improving efficiency, reducing maintenance costs, and enhancing reliability.

[0003] When the stator windings are energized, they generate a magnetic field. The magnetic poles on the rotor experience magnetic force under the influence of this stator magnetic field, causing the rotor to rotate under the influence of electromagnetic force, thus achieving electromechanical energy conversion. However, the magnetic pole structure of existing direct-drive generator rotors still has shortcomings in use. The surface of existing magnetic pole structures is usually planar or simple curved. During the interaction with the stator, planar or simple curved magnetic poles exhibit significant changes in magnetic field strength at the edges, forming an edge effect. This edge effect leads to uneven distribution of the magnetic field in the edge region, resulting in excessively high or low magnetic flux density in some areas. This uneven magnetic flux density affects generator performance and reduces motor efficiency. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model proposes a magnetic pole structure for a wind turbine direct-drive generator rotor.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A magnetic pole structure for a wind turbine direct-drive generator rotor includes a rotating shaft. A main rotor base and an auxiliary rotor base are fixed to the outside of the rotating shaft. A mounting base is provided between the main rotor base and the auxiliary rotor base. A groove is formed on the outer wall of the mounting base, and a magnetic pole block is provided in the groove. The top of the magnetic pole block is arc-shaped.

[0007] Preferably, threaded holes are provided on both the front and rear surfaces of the mounting base near the groove, and fastening bolts are provided in the threaded holes.

[0008] Preferably, the main body of the magnetic pole block is a cuboid structure, the depth of the groove is the same as the thickness of the cuboid structure of the magnetic pole block, and the cuboid structure of the magnetic pole block is located in the groove.

[0009] Preferably, the cuboid surfaces of the magnetic pole block are provided with a frosted structure, and the ends of the fastening bolts can press against the two ends of the magnetic pole block.

[0010] More preferably, the mounting base is provided with a winding inside, and the copper wire end of the winding is provided with a slip ring, which is fixed to the outside of the rotating shaft.

[0011] More preferably, a plurality of reinforcing ribs are provided between the main rotor base and the auxiliary rotor base.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In use, this invention features a magnetic pole block with a rounded top edge. The magnetic field generated by the rounded magnetic pole is smoother and more regular, which helps improve the generator's operating efficiency and power quality. The rounded magnetic pole design increases the effective area of ​​the magnetic pole, allowing more magnetic lines of force to pass through the air gap, thereby increasing the magnetic flux. According to the law of electromagnetic induction, the change in magnetic flux will generate an induced electromotive force in the stator winding, which will increase the output voltage and current, ultimately improving the generator's torque output. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Diagram showing the state of the magnetic pole block after its removal;

[0017] Figure 3 for Figure 1 Diagram showing the state after the mounting bracket has been removed;

[0018] Figure 4 This is an exploded view of the mounting base and magnetic pole block of this utility model;

[0019] Figure 5 for Figure 4 Enlarged view of section A in the middle;

[0020] Figure 6 This is a schematic diagram of the structure of the magnetic pole block of this utility model.

[0021] In the figure: 1. Main rotor base; 101. Reinforcing rib; 2. Secondary rotor base; 3. Slip ring; 4. Shaft; 5. Magnetic pole block; 6. Mounting base; 7. Winding; 8. Fastening bolt; 9. Groove; 10. Threaded hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides, for example Figures 1-6 The magnetic pole structure of a wind turbine direct-drive generator rotor shown includes a rotating shaft 4, a main rotor base 1 and an auxiliary rotor base 2 fixed to the outside of the rotating shaft 4, a mounting base 6 between the main rotor base 1 and the auxiliary rotor base 2, a groove 9 is provided on the outer wall of the mounting base 6, and a magnetic pole block 5 is provided in the groove 9. The top of the magnetic pole block 5 is arc-shaped.

[0024] In this embodiment, the main rotor base 1 and the auxiliary rotor base 2 provide stable support points for the entire magnetic pole structure, ensuring that it will not be displaced or vibrated during high-speed rotation. At the same time, as important support components of the rotating shaft 4, the main rotor base 1 and the auxiliary rotor base 2 enhance the structural strength of the entire magnetic pole structure, enabling it to withstand greater loads and stresses.

[0025] Specifically, by precisely positioning and fixing the magnetic pole block 5, the main rotor base 1 and the auxiliary rotor base 2 help optimize the distribution of the magnetic field and improve the power generation efficiency and stability of the generator.

[0026] like Figures 3-6 As shown, threaded holes 10 are provided on the front and rear surfaces of the mounting base 6 near the groove 9, and fastening bolts 8 are installed in the threaded holes 10; the main body of the magnetic pole block 5 is a cuboid structure, the depth of the groove 9 is the same as the thickness of the cuboid structure of the magnetic pole block 5, and the cuboid structure of the magnetic pole block 5 is located in the groove 9; the two ends of the cuboid of the magnetic pole block 5 are provided with a frosted structure, and the ends of the fastening bolts 8 can press the two ends of the magnetic pole block 5. The frosted structure can improve the friction between the two ends of the cuboid of the magnetic pole block 5 and the inner wall of the groove 9, so as to facilitate the installation of the magnetic pole block 5 in the mounting base 6.

[0027] like Figure 3 As shown, the mounting base 6 has a winding 7 inside, and a slip ring 3 is provided at the copper wire end of the winding 7. The slip ring 3 is fixed to the outside of the rotating shaft 4. The slip ring 3 is located inside the mounting base 6 and connected to the copper wire end of the winding 7. By fixing the slip ring 3 to the outside of the rotating shaft 4, the current can be effectively connected and conducted, ensuring the normal operation of the generator rotor. The design of the slip ring 3 can reduce mechanical friction. Specifically, the traditional carbon brush structure may generate greater friction and wear, while the slip ring 3 can effectively reduce this friction and improve the reliability and life of the system.

[0028] like Figure 3 As shown, multiple reinforcing ribs 101 are provided between the main rotor base 1 and the auxiliary rotor base 2. The reinforcing ribs 101 can effectively improve the overall strength of the mounting base 6, enabling it to withstand greater mechanical stress and vibration, thereby ensuring the stable operation and long-term reliability of the entire magnetic pole structure.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetic pole structure for a wind turbine direct-drive generator rotor, characterized in that: Includes a rotating shaft (4), on the outside of which a main rotor base (1) and a secondary rotor base (2) are fixed. A mounting seat (6) is provided between the main rotor base (1) and the secondary rotor base (2). A groove (9) is provided on the outer wall of the mounting seat (6). A magnetic pole block (5) is provided in the groove (9). The top of the magnetic pole block (5) is arc-shaped.

2. The magnetic pole structure of a wind turbine direct-drive generator rotor according to claim 1, characterized in that: The mounting base (6) has threaded holes (10) on its front and rear surfaces near the groove (9), and fastening bolts (8) are installed in the threaded holes (10).

3. The magnetic pole structure of a wind turbine direct-drive generator rotor according to claim 1, characterized in that: The main body of the magnetic pole block (5) is a cuboid structure. The depth of the groove (9) is the same as the thickness of the cuboid structure of the magnetic pole block (5). The cuboid structure of the magnetic pole block (5) is located in the groove (9).

4. The magnetic pole structure of a wind turbine direct-drive generator rotor according to claim 2, characterized in that: The cuboid surfaces of the magnetic pole block (5) are provided with a frosted structure, and the ends of the fastening bolts (8) can press against the two ends of the magnetic pole block (5).

5. The magnetic pole structure of a wind turbine direct-drive generator rotor according to claim 1, characterized in that: The mounting base (6) is provided with a winding (7) inside, and a collector ring (3) is provided at the copper wire end of the winding (7). The collector ring (3) is fixed to the outside of the rotating shaft (4).

6. The magnetic pole structure of a wind turbine direct-drive generator rotor according to claim 1, characterized in that: Multiple reinforcing ribs (101) are provided between the main rotor base (1) and the auxiliary rotor base (2).

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