Wind driven generator and control method thereof

Abstract

The invention discloses a wind driven generator and a control method thereof.The wind driven generator comprises a rotating part, the rotating part comprises a rotating disc and fan blades installed on the rotating disc, roller paths are arranged in the fan blades, and magnetic balls are installed in the roller paths; the raceway comprises a first raceway cavity, a second raceway cavity, a far-end raceway cavity and a near-end raceway cavity, the first raceway cavity and the second raceway cavity are located on the two opposite sides in the rotating direction of the fan blades correspondingly, and the end, away from the rotating disc, of the first raceway cavity communicates with the end, away from the rotating disc, of the second raceway cavity through the far-end raceway cavity; one end, close to the turntable, of the first raceway cavity is communicated with one end, close to the turntable, of the second raceway cavity through a near-end raceway cavity; the fan blades are provided with the electromagnetic driving units, and when the fan blades rotate to the positions above the first raceway cavities and below the second raceway cavities, the electromagnetic driving units can drive the magnetic balls in the first raceway cavities to move into the second raceway cavities through the far-end raceway cavities, so that magnetic force and gravity assist in rotation of the fan blades, and the problem that the power generation amount is small under the small wind power condition is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generator and a control method thereof. Background Art

[0002] When the blades of a wind turbine rotate, the generator rotor connected to the blades rotates accordingly, generating mechanical energy. The coil inside the generator converts the mechanical energy into electrical energy through the principle of electromagnetic induction. The electrical energy is transmitted to the substation or power grid through cables for users to use.

[0003] For existing wind turbines, when the wind speed is very low, the rotation speed of the fan blades is very low, resulting in low power generation, which may even be unable to meet the needs of the power grid or users.

[0004] Therefore, it is urgent for those skilled in the art to solve the problem of insufficient power generation of wind turbines when the wind is low. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a wind turbine, the wind turbine comprises a rotating part, the rotating part comprises a rotating disk and a blade mounted on the rotating disk, a roller is provided inside the blade, and a magnetic ball is installed inside the roller;

[0006] The roller includes a first roller cavity, a second roller cavity, a distal roller cavity and a proximal roller cavity, the first roller cavity and the second roller cavity are respectively located on opposite sides of the rotation direction of the fan blade, an end of the first roller cavity away from the rotating disk and an end of the second roller cavity away from the rotating disk are connected through the distal roller cavity, and an end of the first roller cavity close to the rotating disk and an end of the second roller cavity close to the rotating disk are connected through the proximal roller cavity;

[0007] The fan blade is configured with an electromagnetic driving unit. When the fan blade rotates to the point where the first raceway cavity is at the top and the second raceway cavity is at the bottom, the electromagnetic driving unit can drive the magnetic balls in the first raceway cavity to move through the distal raceway cavity into the second raceway cavity.

[0008] In one embodiment of a wind turbine, the electromagnetic drive unit includes a first magnetic component, a second magnetic component and an electric control component, wherein the electric control component is electrically connected to the first magnetic component and the second magnetic component via a wire, and the electric control component can control the magnitude of the current to change the magnitude of the magnetic force of the first magnetic component and the second magnetic component, the first magnetic component can give a magnetic repulsive force to the magnetic ball in the distal raceway cavity to move into the second raceway cavity, and the second magnetic component can give a magnetic repulsive force to the magnetic ball in the second raceway cavity to restrict its movement toward the proximal raceway cavity.

[0009] In one embodiment of the wind turbine, the first magnetic component is arranged at the junction of the first raceway cavity and the distal raceway cavity and is arranged close to the outer wall of the raceway, and the second magnetic component is arranged at the junction of the second raceway cavity and the proximal raceway cavity and is arranged close to the outer wall of the raceway.

[0010] In one embodiment of the wind turbine, a surface of the first magnetic member and the second magnetic member on one side facing the inner side wall of the raceway is an arcuate surface, the arcuate surface protrudes toward the outer side wall of the raceway, and the arcuate surface has a curvature in the length direction of the raceway.

[0011] In one embodiment of a wind turbine, a first flow limiting component is provided in the first raceway cavity, a first flow limiting channel is provided on the first flow limiting component for the magnetic balls to pass through, and a cross-sectional area of ​​the first flow limiting channel close to one end of the turntable is larger than a cross-sectional area away from the turntable; a second flow limiting component is provided in the second raceway cavity, a second flow limiting component is provided on the second flow limiting component for the magnetic balls to pass through, and a cross-sectional area of ​​the second flow limiting channel close to one end of the turntable is smaller than a cross-sectional area away from the turntable.

[0012] In one embodiment of a wind turbine, a slide groove extending along the axial direction of the turntable is provided on the outer peripheral surface of the turntable, a slider is installed in the slide groove, and the turntable is equipped with a driving mechanism, and the driving mechanism drives the slider to slide in the slide groove along the axial direction of the turntable, and the fan blade is connected to the slider at one end close to the turntable and is rotatably connected to the turntable through a rotating shaft, so that the fan blade can swing around the central axis of the rotating shaft to achieve angle adjustment as the slider slides.

[0013] In one embodiment of a wind turbine, the turntable is provided with an inner cavity, the driving mechanism is located in the inner cavity of the turntable, the slide groove is a through groove that passes through the inside and outside of the turntable, and the driving mechanism includes an adapter and an electric push rod, the adapter is connected to all the sliders, one end of the electric push rod is connected to the adapter, and the other end of the electric push rod is connected to the turntable, so that the electric push rod can drive the adapter and all the sliders to move along the axial direction of the turntable when it is extended or retracted.

[0014] In one embodiment of the wind turbine, the driving mechanism includes a telescopic rod, one end of the telescopic rod is connected to the adapter, the other end of the telescopic rod is connected to the turntable, and the telescopic rod is parallel to the electric push rod.

[0015] In one embodiment of the wind turbine, the fan blades are provided with flexible rain covers, and the flexible rain covers cover the gap between the slide groove and the slider.

[0016] In one embodiment of the wind turbine, the magnetic ball includes a magnetic part and an insulating part, and the insulating part covers a magnetic pole of the magnetic part, so that the magnetic ball has a magnetic property.

[0017] The present application also provides a control method for a wind turbine, which is based on the implementation of the wind turbine described in any one of the above items. When the wind force is less than a preset lower limit, when the fan blades rotate to the point where the first raceway cavity is on the top and the second raceway cavity is on the bottom, the electromagnetic drive unit is controlled to drive the magnetic balls in the first raceway cavity to move through the distal raceway cavity into the second raceway cavity.

[0018] An implementation method of a control method for a wind turbine, the wind turbine comprising a first magnetic component and a second magnetic component, the first magnetic component being capable of imparting a magnetic repulsive force to a magnetic ball in the distal raceway cavity to cause it to move into the second raceway cavity, the second magnetic component being capable of imparting a magnetic repulsive force to a magnetic ball in the second raceway cavity to restrict it from moving toward the proximal raceway cavity, and when the wind force is less than a preset lower limit, when the fan blades rotate to the point where the first raceway cavity is on top and the second raceway cavity is on the bottom, the magnetic force of the first magnetic component is controlled to be smaller than the magnetic force of the second magnetic component.

[0019] In one implementation of the control method for a wind turbine, when the wind force is greater than a preset upper limit value, the magnetic force of the first magnetic component is controlled to be greater than or equal to the magnetic force of the second magnetic component.

[0020] The wind turbine and control method thereof provided in the present application can utilize an electromagnetic drive unit to drive the magnetic balls in the upper first raceway cavity to move downward through the distal raceway cavity to the lower second raceway cavity under low wind conditions. This movement process provides the fan blades with additional rotational torque, thereby enabling the fan blades to rotate smoothly and quickly, thereby solving the problem of low power generation under low wind conditions.

[0021] Furthermore, the magnetic balls can be concentrated in the area of ​​the second raceway cavity away from the turntable, thereby increasing the rotational torque of gravity on the fan blades. The increased gravity rotational torque further assists the rotation of the fan blades, thereby further improving the power generation under low wind conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of an embodiment of a wind turbine provided by the present invention.

[0023] Figure 2 for Figure 1 An interior view of a single fan blade;

[0024] Figure 3 for Figure 2 An enlarged view of the position of the first magnetic member;

[0025] Figure 4 for Figure 2 An enlarged view of the position of the second magnetic member;

[0026] Figure 5 for Figure 2 An enlarged view of the location of the first current limiting component;

[0027] Figure 6 for Figure 2 An enlarged view of the location of the second current limiting component;

[0028] Figure 7 It is a schematic diagram of the connection position between the fan blade and the turntable;

[0029] Figure 8 is a schematic diagram of a driving mechanism disposed inside a turntable;

[0030] Fig. 9 A schematic diagram of setting a flexible rain cover at the chute position of the turntable;

[0031] Fig.10 An exploded view of an embodiment of a magnetic ball bearing.

[0032] The following are the descriptions of the reference numerals:

[0033] 10 rotating part, 101 rotating disk, 101a sliding groove, 102 fan blade, A first rolling cavity, B second rolling cavity, C distal rolling cavity, D proximal rolling cavity, 103 rotating shaft, 104 magnetic ball, 104a magnetic part, 104b insulating part, 1051 first magnetic member, 1052 second magnetic member, 1053 first fixed block, 1054 second fixed block, 1055 first electric control component, 1056 second electric control component, X arc surface, 106 first current limiting component, 106a first current limiting channel, 107 second current limiting component, 107a second current limiting channel, 108 sliding block, 108a protrusion, 109 rotating shaft, 1101 adapter, 1102 electric push rod, 1103 telescopic rod, 111 flexible rain cover, 112 connecting arm, 113 blocking block;

[0034] 20 engine room, 201 cooling unit;

[0035] 30 bearings; 40 columns; 50 bases. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] like Figure 1As shown, the wind turbine provided by the present application includes a rotating part 10, and the rotating part 10 includes a turntable 101 and a fan blade 102 mounted on the turntable 101. The rotating part 10 is rotatably connected to the generator rotor in the nacelle 20. In the figure, the rotating part 10 and the generator rotor in the nacelle 20 are connected by a rotating shaft 103, and the rotating shaft 103 is provided with a bearing 30 on the outer sleeve, and the bearing 30 is preferably an air bearing. A heat dissipation part 201 is provided on the outer shell of the nacelle 20 to prevent the components in the nacelle 20 from overheating. The nacelle 20 is supported by a bracket. In the figure, the bracket includes a column 40 and a base 50 arranged at the bottom end of the column 40, and the cross-sectional area of ​​the base 50 is larger than the cross-sectional area of ​​the column 40 so that it can be firmly supported on the ground.

[0038] like Figure 2 As shown, a roller track is provided inside the fan blade 102. A magnetic ball 104 is installed inside the roller track. The roller track includes at least a first roller track cavity A, a second roller track cavity B, a distal roller track cavity C and a proximal roller track cavity D. The first roller track cavity A and the second roller track cavity B are respectively located on opposite sides of the rotation direction of the fan blade 102, and the rotation direction of the fan blade 102 refers to the direction around the central axis of the turntable 101. The distal roller track cavity C is located at the end of the fan blade 102 away from the turntable 101, and the proximal roller track cavity D is located at the end of the fan blade 102 close to the turntable 101. The end of the first roller track cavity A away from the turntable 101 and the end of the second roller track cavity B away from the turntable 101 are connected through the distal roller track cavity C. The end of the first roller track cavity A close to the turntable 101 and the end of the second roller track cavity B close to the turntable 101 are connected through the proximal roller track cavity D.

[0039] like Figure 2 As shown, the fan blade 102 is equipped with an electromagnetic drive unit 105. When the fan blade 102 rotates to the first raceway cavity A at the top and the second raceway cavity B at the bottom, the electromagnetic drive unit 105 can drive the magnetic ball 104 in the first raceway cavity A to move into the second raceway cavity B through the distal raceway cavity C.

[0040] In the related art wind turbine, when the wind force is very weak, the rotation speed of the fan blades 102 is very low, resulting in low power generation, and even unable to meet the needs of the power grid or users.

[0041] The present application provides the above-mentioned wind turbine, which can utilize the electromagnetic drive unit 105 to drive the magnetic balls 104 in the upper first raceway cavity A to move downward through the distal raceway cavity C to the lower second raceway cavity B under low wind conditions. This movement process provides the fan blades 102 with additional rotational torque, so that the fan blades 102 can rotate more smoothly and quickly, thereby solving the problem of low power generation under low wind conditions.

[0042] In some embodiments, Figure 2As shown, the electromagnetic drive unit 105 includes a first magnetic member 1051, a second magnetic member 1052 and an electric control component, the electric control component is electrically connected to the first magnetic member 1051 and the second magnetic member 1052 through a wire, and the electric control component can change the magnetic force of the first magnetic member 1051 and the second magnetic member 1052 by controlling the magnitude of the current. Among them, the first magnetic member 1051 can give the magnetic ball 104 in the distal raceway cavity C a magnetic repulsive force to move into the second raceway cavity B, and the second magnetic member 1052 can give the magnetic ball 104 in the second raceway cavity B a magnetic repulsive force to limit its movement toward the proximal raceway cavity D.

[0043] The corresponding control method is: when the wind force is less than the preset lower limit, when the fan blade 102 rotates to the point where the first rolling cavity A is on the top and the second rolling cavity B is on the bottom, the magnetic force of the first magnetic component 1051 is controlled to be smaller than the magnetic force of the second magnetic component 1052.

[0044] In this way, the magnetic balls that move into the distal raceway cavity C under the action of centrifugal force can move into the second raceway cavity B under the action of the magnetic repulsion of the first magnetic part 1051. This movement process gives the fan blades 102 an additional rotational torque. At the same time, under the action of the magnetic repulsion of the second magnetic part 1052, the magnetic balls 104 can stay concentrated for a long time in the area of ​​the second raceway cavity B away from the turntable 101, so that the center of gravity of the fan blades 102 is relatively far away from the turntable 101, thereby increasing the rotational torque of the fan blades 102 due to gravity. The combined effect of the additional rotational torque caused by the movement of the magnetic balls 104 and the increased gravity rotational torque enables the fan blades 102 to rotate smoothly and quickly even under low wind conditions.

[0045] When the wind force is greater than a preset upper limit, the magnetic force of the first magnetic component 1051 can be controlled to be greater than or equal to the magnetic force of the second magnetic component 1052 .

[0046] In this way, the distribution of the magnetic balls 104 changes, and they are no longer concentrated in the area of ​​the second raceway cavity B away from the turntable 101 as mentioned above, so that the gravitational rotational torque is reduced, and the movement direction of the magnetic balls 104 also changes. Some magnetic balls 104 will move from the second raceway cavity B through the proximal raceway cavity D to the first raceway cavity A, so that the additional rotational torque caused by the above movement of the magnetic balls 104 is reduced. Therefore, the auxiliary rotation effect of gravity and magnetic force on the fan blades 102 is reduced, so that the fan blades 102 rely more on wind force to rotate. At the same time, the distribution of the magnetic balls 104 and the change in the movement direction also adjust the rotation speed of the fan blades 102, avoiding problems such as wear and deformation of mechanical parts caused by excessive rotation speed of the fan blades 102 when the wind is strong.

[0047] In some embodiments, such as Figure 2As shown, the first magnetic member 1051 is arranged at the junction of the first raceway cavity A and the distal raceway cavity C and is arranged close to the outer wall of the raceway, and the second magnetic member 1052 is arranged at the junction of the second raceway cavity B and the proximal raceway cavity D and is arranged close to the outer wall of the raceway. This layout, on the one hand, facilitates the first magnetic member 1051 and the second magnetic member 1052 to generate the above-mentioned target direction of the repulsive force on the magnetic ball 104, and on the other hand, makes the first magnetic member 1051 and the second magnetic member 1052 less hinder the movement of the magnetic ball 104 in the raceway.

[0048] In some embodiments, Figure 3 and Figure 4 As shown, one side surface of the inner wall of the raceway facing the first magnetic component 1051 and the second magnetic component 1052 is an arc surface X, which protrudes toward the outer wall of the raceway, and the arc surface X has a curvature in the length direction of the raceway. In this way, the magnetic ball 104 can smoothly pass through the junction of the first raceway cavity A and the distal raceway cavity C and the junction of the second raceway cavity B and the proximal raceway cavity D under the guidance of the arc surface X, avoiding the problem of poor movement of the magnetic ball 104 at these two positions due to the first magnetic component 1051 and the second magnetic component 1052 being arranged at these two positions.

[0049] Specifically, in the illustrated embodiment, Figure 2 As shown, a baffle block 113 is provided inside the fan blade 102, and the raceway is surrounded by the baffle block 113, and the baffle block 113 constitutes the inner side wall of the raceway.

[0050] Specifically, in the illustrated embodiment, Figure 3 and Figure 4 As shown, the fan blade 102 is fixedly provided with a first fixed block 1053 and a second fixed block 1054, which are respectively used to install the first magnetic member 1051 and the second magnetic member 1052. The surface of the first fixed block 1053 and the second fixed block 1054 facing the inner wall of the raceway is an arc-shaped surface, and the first magnetic member 1051 and the second magnetic member 1052 are arc-shaped thin sheet structures, which are respectively fitted on the arc surfaces of the first fixed block 1053 and the second fixed block 1054.

[0051] In some embodiments, the first magnetic member 1051 and the second magnetic member 1052 each correspond to an electric control component, namely, the first electric control component 1055 and the second electric control component 1056. In this way, the first electric control component 1055 and the second electric control component 1056 can be used to control the magnetic force of the first magnetic member 1051 and the second magnetic member 1052 separately, and the first electric control component 1055 and the second electric control component 1056 can be correspondingly arranged near the first magnetic member 1051 and the second magnetic member 1052 to save the length of the electrical connection wire. In the illustrated embodiment, Figure 1As shown, the first electric control component 1055 is fixed outside the fan blade 102 and is correspondingly arranged near the first magnetic component 1051, as shown in FIG. Figure 8 As shown, the second electric control component 1056 is fixed to the outside of the fan blade 102 and is correspondingly arranged near the second magnetic component 1052.

[0052] In some embodiments, such as Figure 2 , Figure 5 and Figure 6 As shown, a first flow-limiting component 106 is provided in the first raceway cavity A, and a first flow-limiting channel 106a is provided on the first flow-limiting component 106 for the magnetic ball 104 to pass through, and the cross-sectional area of ​​the first flow-limiting channel 106a close to the rotating disk 101 is larger than the cross-sectional area of ​​the end away from the rotating disk 101. A second flow-limiting component 107 is provided in the second raceway cavity B, and a second flow-limiting channel 107a is provided on the second flow-limiting component 107 for the magnetic ball 104 to pass through, and the cross-sectional area of ​​the second flow-limiting channel 107a close to the rotating disk 101 is smaller than the cross-sectional area of ​​the end away from the rotating disk 101.

[0053] With this design, the magnetic balls 104 encounter less resistance when moving along the forward circulation path of first raceway cavity A→distal raceway cavity C→second raceway cavity B→proximal raceway cavity D→first raceway cavity A, but encounter greater resistance when moving along the reverse circulation path of second raceway cavity B→proximal raceway cavity D→first raceway cavity A→distal raceway cavity C→second raceway cavity B. In this way, it is easier to concentrate the magnetic balls 104 in the area of ​​the second raceway cavity B away from the turntable 101 when the wind is weak.

[0054] In some embodiments, such as Figure 7 and Figure 8 As shown, a slide groove 101a extending along the axial direction of the turntable 101 is provided on the outer peripheral surface of the turntable 101, and a slider 108 is installed in the slide groove 101a. The turntable 101 is equipped with a driving mechanism, and the driving mechanism drives the slider 108 to slide along the axial direction of the turntable 101 in the slide groove 101a. The end of the fan blade 102 close to the turntable 101 is connected to the slider 108. In the figure, the fan blade 102 and the slider 108 are connected through a connecting arm 112, and the end of the fan blade 102 close to the turntable 101 is also rotatably connected to the turntable 101 through a rotating shaft 109, so that the fan blade 102 can swing around the center line of the rotating shaft 109 with the sliding of the slider 108 to achieve angle adjustment. In other words, when the driving mechanism drives the slider 108 to slide along the axial direction of the turntable 101 in the slide groove 101a, the fan blade 102 will swing around the rotating shaft 109 accordingly, so that the inclination angle of the fan blade 102 changes, so that it can adapt to different wind directions.

[0055] In some embodiments, such as Figure 7As shown, a groove is provided on the side wall of the slide groove 101a, and a protrusion 108a is provided on the corresponding side of the slider 108. The slide groove 101a and the slider 108 achieve concave-convex matching through the groove and the protrusion 108a. The matching of the groove and the protrusion 108a can guide the sliding direction of the slider 108.

[0056] In some embodiments, Figure 8 As shown, the turntable 101 is provided with an inner cavity, the driving mechanism is located in the inner cavity of the turntable 101, the slide groove 101a is a through groove that runs through the inside and outside of the turntable 101, and the driving mechanism includes an adapter 1101 and an electric push rod 1102. The adapter 1101 in the figure is a disc-shaped structure, the adapter 1101 is connected to all sliders 108, one end of the electric push rod 1102 is connected to the adapter 1101, and the other end of the electric push rod 1102 is connected to the turntable 101, so that the electric push rod 1102 can drive the adapter 1101 and all sliders 108 to move along the axial direction of the turntable 101 when it is extended. In this way, when the electric push rod 1102 is extended, it can drive all the blades 102 to adjust the angle together, the adjustment efficiency is high, and the angle consistency of the blades 102 after adjustment is high.

[0057] In some embodiments, the driving mechanism includes a telescopic rod 1103, one end of which is connected to the adapter 1101, the other end of which is connected to the turntable 101, and the telescopic rod 1103 is parallel to the electric push rod 1102. The telescopic rod 1103 plays an auxiliary supporting role to avoid the problem of instability of the adapter 1101 supported by a single electric push rod 1102.

[0058] In some embodiments, Fig. 9 As shown, the fan blade 102 is provided with a flexible rain cover 111, and the flexible rain cover 111 covers the gap between the slide groove 101a and the slider 108, so that rain or impurities can be prevented from entering the inside of the turntable 101 to accelerate the aging of the electrical components inside the turntable 101. It should be noted that when the slider 108 slides along the axial direction of the turntable 101, the flexible rain cover 111 can be adaptively deformed, so as not to affect the sliding of the slider.

[0059] In some embodiments, Fig.10 As shown, the magnetic ball 104 includes a magnetic portion 104a and an insulating portion 104b. The insulating portion 104b covers one magnetic pole of the magnetic portion 104a, so that the magnetic ball 104 has a certain magnetic property.

[0060] The above specific examples are used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A wind turbine, characterized in that: The wind turbine generator comprises a rotating part (10), the rotating part (10) comprising a rotating disk (101) and a fan blade (102) mounted on the rotating disk (101), a roller track being provided inside the fan blade (102), and a magnetic ball (104) being installed inside the roller track; The roller comprises a first roller cavity (A), a second roller cavity (B), a distal roller cavity (C) and a proximal roller cavity (D), the first roller cavity (A) and the second roller cavity (B) being respectively located on opposite sides of the rotation direction of the fan blade (102), an end of the first roller cavity (A) away from the rotating disk (101) and an end of the second roller cavity (B) away from the rotating disk (101) are connected via the distal roller cavity (C), and an end of the first roller cavity (A) close to the rotating disk (101) and an end of the second roller cavity (B) close to the rotating disk (101) are connected via the proximal roller cavity (D); The fan blade (102) is provided with an electromagnetic drive unit (105). When the fan blade (102) rotates to the point where the first rolling cavity (A) is at the top and the second rolling cavity (B) is at the bottom, the electromagnetic drive unit (105) can drive the magnetic ball (104) in the first rolling cavity (A) to move through the distal rolling cavity (C) into the second rolling cavity (B).

2. The wind turbine according to claim 1, characterized in that: The electromagnetic drive unit (105) comprises a first magnetic component (1051), a second magnetic component (1052) and an electric control component, wherein the electric control component is electrically connected to the first magnetic component (1051) and the second magnetic component (1052) via a wire, and the electric control component can control the magnitude of the current to change the magnitude of the magnetic force of the first magnetic component (1051) and the second magnetic component (1052), wherein the first magnetic component (1051) can provide a magnetic repulsive force to the magnetic ball (104) in the distal raceway cavity (C) to move into the second raceway cavity (B), and the second magnetic component (1052) can provide a magnetic repulsive force to the magnetic ball (104) in the second raceway cavity (B) to restrict its movement toward the proximal raceway cavity (D).

3. The wind turbine according to claim 2, characterized in that: The first magnetic member (1051) is arranged at the junction of the first raceway cavity (A) and the distal raceway cavity (C) and is arranged close to the outer wall of the raceway, and the second magnetic member (1052) is arranged at the junction of the second raceway cavity (B) and the proximal raceway cavity (D) and is arranged close to the outer wall of the raceway.

4. The wind turbine according to claim 3, characterized in that: The surface of one side of the first magnetic member (1051) and the second magnetic member (1052) facing the inner side wall of the raceway is an arcuate surface (X), the arcuate surface (X) protrudes toward the outer side wall of the raceway, and the arcuate surface (X) has a curvature in the length direction of the raceway.

5. The wind turbine according to any one of claims 1 to 4, characterized in that: A first flow limiting component (106) is provided in the first rolling track cavity (A), and a first flow limiting channel (106a) is provided on the first flow limiting component (106) for the magnetic ball (104) to pass through, and a cross-sectional area of ​​the first flow limiting channel (106a) close to the rotating disk (101) is larger than a cross-sectional area of ​​the end away from the rotating disk (101); A second flow limiting component (107) is provided in the second rolling track cavity (B), and a second flow limiting channel (107a) is provided on the second flow limiting component (107) for the magnetic ball (104) to pass through, and the cross-sectional area of ​​the second flow limiting channel (107a) at one end close to the rotating disk (101) is smaller than the cross-sectional area at one end away from the rotating disk (101).

6. The wind turbine according to any one of claims 1 to 4, characterized in that: The outer peripheral surface of the turntable (101) is provided with a slide groove (101a) extending along the axial direction of the turntable (101), and a slider (108) is installed in the slide groove (101a). The turntable (101) is provided with a driving mechanism, and the driving mechanism drives the slider (108) to slide in the slide groove (101a) along the axial direction of the turntable (101). The fan blade (102) is connected to the slider (108) at one end close to the turntable (101) and is rotatably connected to the turntable (101) via a rotating shaft (109), so that the fan blade (102) can swing around the central axis of the rotating shaft (109) as the slider (108) slides to achieve angle adjustment.

7. The wind turbine generator according to claim 6, characterized in that: The turntable (101) is provided with an inner cavity, the driving mechanism is located in the inner cavity of the turntable (101), the slide groove (101a) is a through groove that runs through the inside and outside of the turntable (101), and the driving mechanism comprises a transfer part (1101) and an electric push rod (1102), the transfer part (1101) is connected to all the sliders (108), one end of the electric push rod (1102) is connected to the transfer part (1101), and the other end of the electric push rod (1102) is connected to the turntable (101), so that when the electric push rod (1102) is extended or retracted, it can drive the transfer part (1101) and all the sliders (108) to move along the axial direction of the turntable (101).

8. The wind turbine according to claim 7, characterized in that: The driving mechanism comprises a telescopic rod (1103), one end of the telescopic rod (1103) being connected to the adapter portion (1101), the other end of the telescopic rod (1103) being connected to the turntable (101), and the telescopic rod (1103) being parallel to the electric push rod (1102).

9. The wind turbine according to claim 7, characterized in that: The fan blade (102) is provided with a flexible rain cover (111), and the flexible rain cover (111) covers the gap between the slide groove (101a) and the slider (108).

10. The wind turbine according to any one of claims 1 to 4, characterized in that: The magnetic rolling ball (104) comprises a magnetic part (104a) and an insulating part (104b), wherein the insulating part (104b) covers a magnetic pole of the magnetic part (104a), so that the magnetic rolling ball (104) exhibits a certain magnetic property.

11. A control method for a wind turbine generator, based on the implementation of the wind turbine generator according to any one of claims 1 to 10, characterized in that: When the wind force is less than a preset lower limit, when the fan blade (102) rotates to the point where the first rolling cavity (A) is at the top and the second rolling cavity (B) is at the bottom, the electromagnetic drive unit (105) is controlled to drive the magnetic ball (104) in the first rolling cavity (A) to move through the distal rolling cavity (C) into the second rolling cavity (B).

12. The control method of a wind turbine generator according to claim 11, characterized in that: The wind turbine comprises a first magnetic component (1051) and a second magnetic component (1052), wherein the first magnetic component (1051) can provide a magnetic repulsive force to the magnetic ball (104) in the distal raceway cavity (C) to cause it to move into the second raceway cavity (B), and the second magnetic component (1052) can provide a magnetic repulsive force to the magnetic ball (104) in the second raceway cavity (B) to restrict it from moving toward the proximal raceway cavity (D), and when the wind force is less than a preset lower limit, when the fan blade (102) rotates to the point where the first raceway cavity (A) is at the top and the second raceway cavity (B) is at the bottom, the magnetic force of the first magnetic component (1051) is controlled to be smaller than the magnetic force of the second magnetic component (1052).

13. The control method of a wind turbine generator according to claim 12, characterized in that: When the wind force is greater than a preset upper limit value, the magnetic force of the first magnetic component (1051) is controlled to be greater than or equal to the magnetic force of the second magnetic component (1052).

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