KR100986654B1 - Generator and wind power system using the same - Google Patents

Abstract

The present invention relates to a generator for producing electric power using external force, such as wind power, and a wind power generation system including the same. In particular, the present invention is a rotor rotated by an external force; And a stator arranged in the rotational axis direction and interacting with the rotor, wherein the stator includes a stator disk that is a fixed body, a plurality of stator poles protruding from the stator disk, and a stator coil supported by the stator poles. It is characterized by the configuration of the axial magnetic flux as well as structurally more stable generator and wind power generation system including the same.

Generator, Wind Power, Axial Flux, Stator, Stator Pole, Stator Coil

Description

Generator and wind power generation system including same {GENERATOR AND WIND POWER SYSTEM USING THE SAME}

The present invention relates to a generator for producing electric power using external force, such as wind power, and a wind power generation system including the same.

In general, a generator is a device that converts external force, which is mechanical energy, into electrical energy, and is used in various fields. In particular, generators are being developed in various countries around the world to produce electric power using wind or tidal power, which is clean energy, due to the seriousness of energy crisis and environmental pollution caused by exhaustion of fossil fuel.

Looking at the power generation process of the generator based on the wind, the drive shaft is connected to the fan to generate a rotational force by receiving the wind, and the gearbox is provided to increase the rotational speed of the drive shaft connected to the generator. The generator causes the rotor (rotator) connected to the increase gear to rotate, thereby generating electromotive force by electromagnetic induction between the rotor and the stator (fixing body).

However, in the case of a generator that generates electric power using wind, etc., the external force may not always work sufficiently. For this reason, there is also a problem in that loss of power occurs when the gearbox is provided in order to use a low-speed rotational force such as wind power. Therefore, in the case of a generator that generates electric power using such wind power, there is an urgent need for a method capable of generating power at low speed and high efficiency even without an increase gear.

The present invention has been made to solve the above problems, an object of the present invention is to provide a generator that can be directly driven by an external force such as wind power, and can be generated at high efficiency even at a low speed, and a wind power generation system including the same.

It is still another object of the present invention to provide a generator and a wind power generation system including the same so that the stator coil can be more structurally supported.

The present invention to solve the above problems is a rotor rotated by an external force; And a stator arranged in the rotational axis direction and interacting with the rotor, wherein the stator includes a stator disk that is a fixed body, a plurality of stator poles protruding from the stator disk, and a stator coil supported by the stator poles. It proposes a generator characterized in that.

The plurality of stator poles may protrude radially outwardly of the stator disc.

The plurality of stator poles may be coupled to the stator disc either integrally or individually.

Each of the plurality of stator poles may include a coupling part coupled to the stator disc, and a rod-shaped support part supporting the stator coil.

The coupling part may have a groove into which an end of the support part is fitted.

The coupling portion may be formed in a fork shape to be fitted to the outside of the stator disk.

The stator disk and the stator pole may be formed of a material capable of forming a magnetic path for electromagnetic induction of the rotor and the stator.

The stator coils may be wound to be individually coupled to the respective stator poles.

The stator coil may be wound to the outside of the stator pole so that the stator coil may be radially fitted to the stator disc.

The stator coils may be coupled to each of the stator poles in pairs to be spaced apart in the rotation axis direction.

The stator coil may be configured to protrude from the stator disc in both sides of the rotation axis direction.

The stator may further include a stopper coupled to an end of the stator pole after coupling the stator coil to prevent separation of the stator coil.

The stopper may include a ring-shaped end ring to connect the ends of the plurality of stator poles.

The end ring is composed of a plurality of pieces connected to each other to form a ring, each piece may be formed with an insertion portion is inserted into the end of the stator pole.

The stopper may be formed of a material capable of forming a magnetic path for electromagnetic induction of the rotor and the stator together with the plurality of stator poles.

The stator may be molded.

The rotor and the stator may be configured to be arranged in multiple stages.

In addition, the present invention provides a wind power generation system for generating the above-described generator by the wind to solve the above problems.

The stator disk may be hollow to be fixed to the pillar of the wind power generation system.

As described above, according to the present invention, various effects including the following can be expected. However, the present invention does not necessarily achieve the following effects.

First, by being composed of the axial magnetic flux type, it can be generated at low speed and high efficiency, and can be driven directly.

In addition, since the stator coil can be structurally supported by the stator pole, it is structurally stable and therefore, large-sized production is easy.

In addition, the detachment of the stator coil can be prevented by the stopper.

In addition, the stopper may be formed in a ring shape to prevent sagging of the stator poles.

In addition, since the stator coils can be configured in individual units, productivity can be increased.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations will be omitted so as not to obscure the gist of the present invention.

1 is a configuration diagram of a generator according to the present invention, Figure 2 is a perspective view of the main part of the generator according to the present invention.

As shown, the generator according to the present invention is a permanent magnet rotor (10) that is rotated by an external force, such as wind power, and fixed to the concrete pillar (2) of the wind power generation system, the rotor 10 and the rotating shaft It is configured to include a stator (20) arranged in the direction is electromagnetically induced.

That is, the rotor 10 is arranged on both sides of the rotation axis direction of the stator 20 as in the present embodiment, or in another embodiment, the stator 20 is arranged on both sides of the rotation axis direction of the rotor 10, thereby generating a high efficiency generator. Can be designed. In addition, as another embodiment, the rotor 10 and the stator 20 are arranged in multiple stages, so that a generator having a high generation capacity may be designed. Meanwhile, the two or more rotors 10 may be configured such that the permanent magnets face the N poles and the S poles in the rotation axis direction, or the permanent magnets face each other with the same poles.

By designing the generator in the axial magnetic flux type as described above, it is possible to take advantage of the high efficiency by having a short path of the magnetic circuit and a high energy density. In addition, by designing a slim generator having a large diameter and a short axial length, it is advantageous in terms of miniaturization and light weight, and thus has a high efficiency per unit volume and high efficiency, and the length of the arc even if the rotation angle is small due to the large radius of rotation. Even if the small rotor 10 is rotated, the magnetic flux formed by the rotor 10 may be sufficiently changed, thereby taking advantage of being able to sufficiently develop at low speed. In addition, since the slim design and the rotor 10 and the stator 20 can be arranged in multiple stages, the power generation capacity may be adjusted as needed. In addition, since the rotor 10 can be directly coupled to a blade for transmitting external force without being disturbed by the stator 20, the direct-driven generator is designed, so that the gearbox can be omitted and the structure can be simplified. It can take advantage of high efficiency because there is no power loss.

Such a generator, when applied to a wind power system, is coupled to a plurality of blades 4 in which the rotor 10 is rotated by the wind.

3 is a perspective view of the stator of the generator according to the first embodiment of the present invention, Figure 4 is an exploded perspective view showing a part of the stator of the generator according to the first embodiment of the present invention, Figure 5 is a line AA of FIG. According to the cross-sectional view.

As shown, the stator 20 of the first embodiment is a stator disk 30 that is a fixed body, a plurality of stator poles 40 that protrude from the stator disk 30, and a stator pole 40. It may be configured to include a stator coil (50) supported by ().

As described above, the stator coil 50 is supported by the stator pole 40, so that it is mechanically more robust and structurally stable than without the stator pole 40, thereby making it easier to manufacture a large size and stator coil ( 50) The winding shape can be maintained steadily even if it is not hardened by resin, etc., and the winding coil type can be used instead of the film coil type, so that the coil winding density can be increased to design a high efficiency generator.

The stator disk 30 may have a hollow 32 formed at the center thereof so that the stator disk 30 may be fixed to the concrete pillar. The stator disk 30 may be formed of a non-conductive material as needed, or may be formed of an iron core or a silicon steel sheet to serve as a ruler.

The plurality of stator poles 40 are configured to protrude in the radially outward direction of the stator disk 30, thereby reducing the radial size of the stator disk 30 to be smaller than the overall radius of the stator 20, Both sides of the axis of rotation can be used simultaneously to design a more efficient generator.

The plurality of stator poles 40 may be formed integrally with the stator disk 30. However, it is more preferable that a plurality of stator poles 40 are separately manufactured and combined with the stator disc 30. That is, it is easier to manufacture the stator disk 30 and the stator pole 40, and thus there is no structural limitation of the stator pole 40. In addition, after the stator coil 50 is coupled to the stator pole 40, the combination is combined with the stator disc 30, so that the stator coil 50 can be coupled to the stator pole 40 in individual units to increase productivity. .

The plurality of stator poles 40 may be integrally coupled to the stator disc 30, and more preferably, the stator coils 50 may be individually coupled so that the stator coils 50 may be combined in individual units.

The plurality of stator poles 40 may have any shape as long as it can support the stator coil 50. However, as for the stator pole 40, it is more preferable that the support part 42 which supports the stator coil 50 is formed in rod shape so that the stator coil 50 may be easily fitted. The stator pole 40 may further include a coupling part 44 so that the support part 42 may be easily coupled with the stator disk 30 as the support part 42 takes the rod shape.

The support part 42 and the coupling part 44 may be integrally formed, but it is more preferable that the support part 42 and the coupling part 44 are separately manufactured and combined so as not to be subject to structural constraints. More preferably, the coupling portion 44 is formed with a groove 44A in which the end portion of the supporting portion 42 is radially fitted so that the support portion 42 and the coupling portion 44 can be easily coupled and have a simple structure. Can be.

The coupling portion 44 may take any structure, but fork to have a space 44B that can be radially fitted to the outside of the stator disk 30 in order to be more securely coupled with the stator disk 30. It is more preferable that it is formed in a) shape.

The coupling portion 44 may be coupled to the stator disk 30 in any manner, and may be coupled in a bolting 46 manner as an example.

The stator pole 40 may be configured only to structurally support the stator coil 50, and further, may form a magnetic path for electromagnetic induction of the rotor and the stator 20, that is, iron core or silicon steel sheet, etc. The magnetic flux density can be increased for high efficiency.

The stator coil 50 is wound so as to be radially fitted to the outside of the stator pole 40, so that one stator coil 50 is simultaneously on both sides of the rotation axis direction, and is simply fitted to the stator pole 40. Can be.

The stator coil 50 is configured to protrude from the stator disk 30 on both sides in the rotational axis direction, so that the air gap with the rotor can be reduced, so that the magnetic flux density can be increased, and the thickness of the stator disk 30 can be reduced. It can take advantage of that.

Meanwhile, the stator 20 may further include a stopper 60 coupled to the end of the stator pole 40 after coupling the stator coil 50 to prevent separation of the stator coil 50. .

The stopper 60 may take a variety of structures, but includes an end ring 62 having a ring shape to connect the ends of the plurality of stator poles 40, thereby sagging the stator poles 40. Can be prevented, and as a result, the friction between the stator coil 50 and the rotor can be prevented.

More preferably, the end ring 62 has a split structure to facilitate engagement with the stator pawl 40. That is, the ring-shaped stopper 60 may be composed of a plurality of pieces 62A connected to each other to form a ring. Furthermore, each piece 62A may be formed with an insertion portion 62B of a groove or hole structure in which an end of the stator pole 40 is inserted so as to be firmly coupled to the stator pole 40.

The stopper 60 may be made of an insulator, or may be made of a material capable of forming a rotor for electromagnetic induction of the rotor and the stator together with the plurality of stator poles 40.

6 is a perspective view of a stator according to a second embodiment of the present invention, Figure 7 is an exploded perspective view of the stator according to a second embodiment of the present invention, Figure 8 is a cross-sectional view taken along the line B-B of FIG.

In describing the present embodiment, duplicate descriptions thereof will be omitted in order not to confuse the gist of the present embodiment with the same or similar description as the first embodiment of the present invention.

As shown, in the stator 100 of the present embodiment, the stator pole 110 is a bar (bar) for supporting the stator coil 120 so that the stator coil 120 can be fitted in the rotation axis direction (bar) The stator coil 120 is coupled to the support 112 of one stator pole 110 to be spaced apart in the rotation axis direction.

The bar-shaped support portion 112 may be configured to have a cross section having a substantially 'I' shape by forming slots 112A radially long on both sides of the circumferential direction. Accordingly, the support 112 may be separated from the portion where the pair of stator coils 120 are coupled, so that the pair of stator coils 120 may be easily coupled to the correct position.

The bar-shaped support part 112 may be formed to protrude from the jaw 112B at both ends of the rotation axis direction in order to prevent the stator coil 120 from being separated.

On the other hand, the stator pole 110 is configured in a variety of structures can be combined with the stator disk 140, by the stator disk 140 and bolting (B) method, etc. to be more easily combined with the stator disk 140 It may include a first coupling portion 114 to be coupled, and a second coupling portion 116 protruding from the first coupling portion 114 so that the support portion 112 can be radially fitted.

In this case, the support part 112 may have a fitting hole 112C in a radial direction to be fitted to the second coupling part 116. The first coupling part 114 and the second coupling part 116 may be integrally formed, and as shown in this embodiment, the first coupling part 114 and the second coupling part 116 are separately formed and A groove 114A into which the second coupling part 116 may be fitted may be formed in the first coupling part 114.

The stator 100 may be integrated by an end ring as in the first embodiment of the present invention described above, and the separation of the stator coil 120 and the integration of the plurality of stator poles 110 may be prevented as in the present embodiment. For this purpose, it may be covered by the molding material 130 by being molded.

On the other hand, as another embodiment, the support 112 may be composed of a plurality of iron core pieces to ensure a sufficient magnetic path without being disturbed the flow of magnetic flux for high efficiency. More preferably, the plurality of iron core pieces have a radially stacked structure so as to be parallel to the air gap surfaces of the rotor 10 and the stator 20 for smooth flow of the magnetic flux.

In addition, as another embodiment, the stator coil 120 may be wound to be radially fitted to the outside of the support part 112 as in the first embodiment of the present invention described above.

Since the above has been described only with respect to some of the preferred embodiments that can be implemented by the present invention, the scope of the present invention, as is well known, should not be construed as limited to the above embodiments, the present invention described above It will be said that both the technical idea and the technical idea which together with the base are included in the scope of the present invention.

1 is a block diagram of a generator according to the present invention.

2 is a perspective view of main parts of a generator according to the present invention.

3 is a perspective view of the stator of the generator according to the first embodiment of the present invention.

4 is an exploded perspective view showing a part of the stator of the generator according to the first embodiment of the present invention.

5 is a cross-sectional view taken along the line A-A of FIG.

6 is a perspective view of a stator according to a second embodiment of the present invention.

7 is an exploded perspective view of a stator according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view taken along line B-B of FIG. 6.

<Explanation of symbols on main parts of the drawings>

10; Rotor 20; Stator

30; Stator disc 40; Stator poles

42; Support 44; Joint

50; Stator coil 60; stopper

62; End ring 62A; peace

Claims (19)

A rotor rotated by an external force, and a stator spaced apart from the rotor along the rotation axis direction of the rotor so as to interact with the rotor along the rotation axis direction of the rotor; And the stator includes a stator disk which is a fixed body, a plurality of stator poles protruding from the stator disk, and a stator coil supported by the stator poles. The method according to claim 1, And said plurality of stator poles protrude radially outwardly of said stator disk. The method according to claim 1, And the plurality of stator poles are integrally or individually coupled to the stator disc. The method according to claim 2, The plurality of stator poles, each of the generator is characterized in that it comprises a coupling portion coupled to the stator disk and a rod-shaped support for supporting the stator coil. The method according to claim 4, The coupling unit is characterized in that the groove is formed to the end of the support portion is formed. The method according to claim 4, The coupling unit is characterized in that the generator is formed in a fork shape to be fitted to the outside of the stator disk. The method according to claim 1, And the stator disc and the stator pole are formed of a material capable of forming a magnetic path for electromagnetic induction of the rotor and the stator. The method according to claim 1, The stator coil is characterized in that the winding to be coupled to each of the stator poles in an individual unit. The method according to claim 8, And the stator coil is wound around the stator pole so that the stator coil may be radially fitted to the stator disc. The method according to claim 8, And the stator coils are coupled to each of the stator poles in pairs to be spaced apart in the rotational axis direction. The method according to claim 1, The stator coil is configured to protrude from the stator disk to both sides of the rotation axis direction. The method according to any one of claims 1 to 11, The stator, characterized in that the generator further comprises a stopper coupled to the end of the stator pole after coupling the stator coil to prevent separation of the stator coil. The method according to claim 12, The stopper is a generator characterized in that it comprises a ring-shaped end ring to connect the ends of the plurality of stator poles. 14. The method of claim 13, The end ring is composed of a plurality of pieces connected to each other to form a ring, Each piece is characterized in that the generator is formed an insertion portion is inserted into the end of the stator pole. 14. The method of claim 13, And the stopper is formed of a material capable of forming a magnetic path for electromagnetic induction of the rotor and the stator together with the plurality of stator poles. The method according to any one of claims 1 to 11, And said stator is molded. The method according to any one of claims 1 to 11, And the rotor and the stator are configured to be arranged in multiple stages. The wind power generation system which generates the generator of any one of Claims 1-11 by wind power. 19. The method of claim 18, The stator disk is a wind power generation system, characterized in that the hollow is formed to be fixed to the pillar of the wind power generation system.

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