KR100743475B1 - Apparatus for generating power of wind turbine - Google Patents

Abstract

The present invention relates to a variable electricity generator of a wind power generator, the object of which relates to a variable electricity generator of a wind power generator to enable the generation of electricity with high efficiency in response to the ever-changing wind speed and direction. The present invention for this purpose in the electric generator of the wind generator for generating electricity by using the mechanical energy generated from the rotating cylinder rotated by the force of the wind, the lower end of the rotating cylinder is installed to have a circular array structure and the rotating cylinder A magnet group consisting of a plurality of magnets rotating together; A plurality of coil units installed on a fixed shaft for supporting rotation of the rotating cylinder by the fixing member so as to form concentric circles with the magnets at the lower ends of the magnets; Wind speed detection unit for detecting the magnitude of the wind speed; A power storage unit storing electricity generated by the plurality of coil units; Technical aspect of the present invention relates to a variable electricity generator of a wind turbine having a terminal unit for determining and connecting coil units connected to a power storage unit according to the wind speed sensed by the wind speed detection unit.

Magnet group, coil unit, fixing member, wind speed, terminal part

Description

Variable generator for wind power generators {APPARATUS FOR GENERATING POWER OF WIND TURBINE}

1 is a perspective view of a wind turbine with an electric generator according to a preferred embodiment of the present invention;

2 is a front view of FIG. 1,

3 is a front sectional view showing a configuration of an electric generator installed in the wind power generator shown in FIG.

Figure 4 is a plan sectional view showing the configuration of the electric generator shown in FIG.

5 is a detailed view of portion 'A' of FIG. 4;

<Description of the symbols for the main parts of the drawings>

110: rotating cylinder 111: wing

120: support portion 121: fixed block

(122): fixed shaft (123): bearing

(130): Magnet group 131: Magnet

140: coil unit 150: fixing member

(151): disc bracket 151a: protrusion

(151b): ball 152: fixing bracket

(153): bolt (160): wind speed detection unit

170: power storage section 180: terminal section

The present invention relates to an electric generator for generating electricity by converting the mechanical energy generated by the wind into electrical energy, in particular, so that the generation of high efficiency by varying the power generation structure according to the size of the wind speed, such as breeze or strong wind It relates to a variable type electric generator of a wind turbine.

In general, many wind turbine generators that generate electricity by using wind power are being researched as alternative energy sources as resources such as oil, coal, and natural gas are depleted due to industrial development and population growth.

On the other hand, generally used horizontal wind power generator is composed of a rotor having a plurality of blades on the upper end of the structure erected high from the ground. The horizontal wind power generator is a rotor rotates by the force of the wind, the mechanical energy generated by the rotation of the rotor is transferred to the generator to convert into electrical energy to generate electricity.

However, in order to maintain stable power generation conditions, such a horizontal wind turbine must be positioned at a high altitude close to the normal flow, which causes excessive increase in the structure supporting the rotor. High risk, and has a lot of difficulties in the maintenance and repair of rotors, generators and various major parts. In addition, the horizontal wind power generator was able to operate only in the wind speed range of 4 ~ 25m / sec due to the structural characteristics that the rotor, generator and various major components are installed on the upper end of the structure as described above. That is, when wind with wind speed of 25m / sec or more acts on the rotor and the rotor rotates at a relatively high speed, the load acts on the various parts supporting the rotor, which is a large structure, and the parts of the electricity generation system, resulting in the risk of damage. There is this. Therefore, currently used horizontal wind turbines are designed to substantially stop all operation at wind speeds of 25 m / sec or more. In order to overcome these disadvantages, parts supporting the rotor and parts of the electricity generating system should be manufactured to be large enough to withstand sufficient load, but the size of the parts is limited because the size of the structure installed on the upper part of the structure is limited. There was a limit to.

Therefore, the conventional horizontal wind power generator has a problem that the power generation efficiency is low by not using enough of the force of the wind and stop the operation when a typhoon or a gust occurs.

In consideration of the above problems, Korean Patent Application No. 2005-0005062 filed by the present applicant discloses a wind generator using a rotating cylinder. The disclosed wind generator is composed of a rotating cylinder and a plurality of wind vanes hingedly coupled to the rotating cylinder while maintaining a constant distance from each other on the outer circumferential surface of the rotating cylinder, thereby being rotated by the force of wind acting on the wind vanes. This rotation, and the mechanical energy generated by the rotation of the rotating cylinder is transmitted to the generator through the rotating shaft and the gearbox is converted into electrical energy. Such a wind generator has the advantage of being able to continuously generate power without being influenced by the direction of the wind and being relatively less affected by the wind speed, but in the event of a typhoon or gust, the rotating cylinder rotates at an excessively high speed to generate a power transmission system and electricity. The parts of the system are broken, so there is a problem that can not stop the operation.

In addition, the amount of power generated by the wind generator corresponds to Cp × 1/2 × ρ × A × V ³ (where Cp is the output coefficient, ρ is the air density, A is the cross-sectional area, and V is the wind speed). It did not respond to energy loss and various changes in wind speed sensitively, and power generation proportional to V ³ according to the change in wind speed was not applied.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a variable electricity generating apparatus of a wind power generator capable of generating electricity with high efficiency in response to varying wind speeds and directions.

Another object of the present invention is to provide a variable electricity generating device of a wind turbine in which the power generation structure is changed according to the wind speed and the amount of power generation is variable.

Still another object of the present invention is to provide a variable electricity generating device of a wind power generator that can smoothly generate power during a typhoon or a gust by controlling the rotation speed of the rotating cylinder according to the wind speed without a separate transmission.

The present invention to achieve the object as described above and to solve the conventional drawbacks is provided with a plurality of wings on the outer peripheral surface by converting the mechanical energy generated from the rotating cylinder rotated by the force of the wind into electrical energy In the electric generator of the wind power generator for generating electricity,

A plurality of magnets are installed so as to rotate together with the rotating cylinder at the lower end of the rotating cylinder and have a circular array structure, and the circularly arranged magnets are arranged to have the same center of rotation as the center of rotation of the rotating cylinder, and adjacent magnets. A magnet group consisting of different polarities disposed so as to face the inside of the rotating cylinder;

At the lower end of the magnets are arranged in a concentric circle with the magnets and are installed by a fixing member on a fixed shaft for supporting the rotation of the rotating cylinder to approach the magnets, gradually consisting of a coil having a large diameter and a short length A plurality of coil units generating different energy;

Wind speed detection unit for detecting the magnitude of the wind speed;

A power storage unit storing electricity generated by the plurality of coil units;

And a terminal unit electrically connecting the respective coil units and the power storage unit to determine and connect the coil units connected to the power storage unit according to the wind speed sensed by the wind speed detection unit. It is characterized by.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 and 2 show a wind turbine with an electric generator of the present invention installed. 1 and 2, the wind generator is composed of a rotating cylinder 110, the support portion 120. The rotating cylinder 110 has a structure similar to a drum, and a plurality of wings 111 are provided on the outer circumferential surface thereof so that the rotating cylinder 110 can rotate under the force of the wind, and each wing 111 is a rotating cylinder 110. Is projected to the outside of the wind force or is in close contact with the outer circumferential surface of the rotating cylinder 110 is configured to reduce the rotational resistance. Each of the wings 111 may be composed of a cloth is installed inside the frame having a predetermined shape. Such a wing 111 is unfolded by the wind when the concave surface 111a of the wing 111 is located in a direction facing the wind, and the convex other surface 111b of the wing 111 in a direction facing the wind. When it is placed, it is configured to be folded by the wind. Accordingly, the wing 111 located on one side of the wind blowing direction is unfolded to receive the force of the wind, and the wing 111 located on the opposite side is folded to reduce the rotational resistance of the rotating cylinder 110. The support part 120 supports the rotation of the rotating cylinder 110, and is fixed to the ground fixed block 121, and extends upward from the upper surface of the fixed block 121, the rotating cylinder 110 and bearing It is comprised by the fixed shaft 122 which supports rotation of the rotating cylinder 110 by being connected by 123. As shown in FIG.

3 to 5 show that the electric generator according to a preferred embodiment of the present invention is installed in the wind turbine. 3 to 5, the electric generator according to the preferred embodiment of the present invention includes a magnet group 130, a plurality of coil units 140, a wind speed detection unit 160, and a power storage unit 170. ) And a terminal unit 180. The electricity generating device generates electricity by converting the mechanical energy generated by the rotation of the rotating cylinder 110 into electrical energy, and the power generation structure is changed according to the wind speed, so that it is possible to generate power using strong winds such as typhoons or gusts. It is configured to enable high power generation efficiency.

The magnet group 130 is composed of a plurality of magnets 131 are installed at the lower end of the rotating cylinder 110 to have a circular array structure, wherein the circularly arranged magnets 131 are the center of rotation of the rotating cylinder 110 and The same center of rotation, that is, the circular arrangement around the fixed shaft 122. On the other hand, the magnets are installed to be inserted into the lower end of the rotating cylinder 110 to be exposed without protruding from the bottom of the rotating cylinder (110). Accordingly, the magnets 131 are stably maintained without being affected by the centrifugal force even when the rotating cylinder 110 is rotated. In addition, the magnets 131 are installed such that different polarities between adjacent magnets 131 face the inside of the rotating cylinder 110. As an example, further magnets are disposed on both sides of the magnet in which the N pole is arranged to face the inside of the rotating cylinder 110, and further magnets are arranged such that the S pole faces the inside of the rotating cylinder 110. It is installed to have. The magnet group 130 is installed to be fixed to the lower end of the rotary cylinder 110 is to rotate with the rotary cylinder 110.

The coil units 140 generate electricity by reacting with the magnet group 130. In addition, the coil units 140 are close to the magnets 131 at the lower ends of the magnets 131 constituting the magnet group 130. It is provided on the fixed shaft 122 by the fixing member 150 to form a concentric circle structure. In addition, each coil unit 140 is configured to have. That is, the coil units arranged adjacent to one of the coil units on the basis of the coil unit are gradually configured to be coils having a large diameter and a short length. These coil units 140 are controlled by the terminal unit 180 to generate electricity in a predetermined number of coil units 140 in accordance with the wind speed sensed by the wind speed detection unit 160 to form a group to the wind speed Electricity is generated accordingly. In other words, at low wind speeds, coil units made of thin coils and long coils participate in power generation. At high wind speeds, coil units made of coils with shorter diameters and shorter length coils participate in power generation.

The fixing member 150 is composed of a disc-shaped bracket 151, a fixing bracket 152, and a plurality of bolts 153 to fix the coil units 140 in a state close to the vertical lower end of the magnet 131. do. The disc-shaped bracket 151 has a structure in which a fixed shaft 122 penetrates at a central portion thereof, and is installed to be movable along the fixed shaft 122. A protruding portion 151a formed to extend upward is provided at a circumferential circumference thereof. The upper end of the protruding portion 151a includes a plurality of balls 151b which are in contact with the bottom surface of the rotating cylinder 110 and perform a rolling motion. On the upper surface of the disc-shaped bracket 151, a plurality of coil units 140 are installed to have a circular array structure. The fixing bracket 152 is fixed to the fixed shaft 122 to be positioned below the disk-shaped bracket 151, and is provided with a plurality of fastening holes 152a penetrating to connect the upper and lower surfaces thereof. Consists of. The plurality of bolts 153 are fastened to the respective fastening holes from the bottom of the fixing bracket 152, the end of which is configured to protrude to the top of the fixing bracket 152, bolts protruding to the top of the fixing bracket 152 in this way The end of the 153 contacts the bottom of the disc-shaped bracket 151 and pushes the disc-shaped bracket 151 upward so that the magnet group 130 and the coil unit 140 are kept in close proximity. .

The wind speed detection unit 160 detects the wind speed in the region where the wind power generator is installed, and the wind speed detection unit 160 may be used in the market, a wind speed sensor in circulation and its detailed description will be omitted.

The power storage unit 170 is electrically connected to the coil unit 140 to store the electricity generated from the coil unit 140.

The terminal unit 180 is electrically connected to each of the coil units 140 and electrically connected to the power storage unit 170 to transfer electricity generated by the coil unit 140 to the power storage unit 170. The coil unit 140 is electrically connected to the power storage unit 170 according to the wind speed sensed by the wind speed detection unit 160. That is, when the weak wind is detected from the wind speed detection unit 160, the terminal unit 180 controls the coil unit 140 made of a coil having a relatively small diameter and long length to be connected to the power storage unit 170, the strong wind is When detected, the coil unit 140 made of a coil having a larger diameter and a shorter length is controlled to be connected to the power storage unit 170.

Referring to the operation of the electric generator device configured as described above are as follows.

In the case of the rotating cylinder 110, the wing 111 is evenly provided on the entire outer circumferential surface, so that rotation is possible regardless of the direction of the wind. In other words, the concave surface 111a of the wing 111 is located in a direction facing the wind, and the wing 111 is extended to protrude out of the rotation cylinder 110 to receive the force of the wind, and thus the rotation cylinder 110 is Mechanical energy is generated by rotating about the fixed shaft 122, and the generated mechanical energy is converted into electrical energy by the magnet group 130 and the plurality of coil units 140 and stored in the power storage unit 170. do.

Meanwhile, the terminal unit 180 selects and connects the coil units 140 connected to the power storage unit 170 according to the wind speed sensed by the wind speed detecting unit 160, thereby generating a power generation structure according to the detected wind speed. Differently, the amount of power generated and the rotational speed of the rotating cylinder 110 are changed. That is, n coil units (S ₁ , S ₂ , S ₃ ) from the coil unit (S ₁ ) consisting of the coil having the smallest wire diameter and long length to the coil unit (S _n ) consisting of the coil having the largest wire diameter and short length. If it is assumed that the ..., S _n ) is installed on the fixed shaft 12, when the low wind speed is sensed by the wind speed sensing unit 160, the terminal unit 180 is S ₁ of the coil units of the magnet group The power storage unit 170 is connected to the selected coil unit S ₁ to generate power in response to 130. On the other hand, if the wind speed increases more, the terminal unit 180 controls the two coil units (S ₁ , S ₂ ) to participate in the power generation together, and if the wind speed increases more, the terminal unit 180 is three coil units (S ₁ , S ₂ , S ₃ ) will be controlled to participate in the development together. As such, the terminal unit 180 connects the selected coil units 140 and the power storage unit 170 so that a greater number of coil units 140 participate in power generation according to the wind speed sensed by the wind speed detection unit 160. . When the wind speed is detected at a predetermined speed or more in a state in which the coil units corresponding to S ₁ to S ₈ are connected to the power storage unit 170 by the control of the terminal unit 180 to participate in power generation, the terminal unit 180 has the smallest wire diameter. a coil unit consisting of a coil (S ₁₎ and is from participating in any more power to disconnect the coil unit (S ₁₎ of the power storage unit 170, and, in addition, consisting of a coil having a larger diameter coil unit ( S ₉ ) will be controlled to participate in the new development. As such, the terminal unit 180 controls the coil units made of coils having a thicker wire diameter to participate in power generation as the detected wind speed increases, and unnecessary coil units are controlled to not participate in further generation.

As a result, each coil unit is connected to the power storage unit 170 only in a range corresponding to the voltage and current corresponding to the wire diameter of the coil constituting itself to participate in power generation, so that power generation is possible at a wind speed of 50 m / sec. In addition, since the resistance generated from the coil unit participating in the power generation controls the rotation speed of the rotating cylinder according to the wind speed, the wing which is an ideal condition for maintaining the best efficiency in the theory of drag force wind power generation. That is, the terminal unit 180 is connected to the power storage unit 170 to participate in power generation by selecting the coil units 140 so that the rotational speed of the rotating cylinder can maintain 1/3 of the wind speed.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention enables the development of high efficiency by selecting and connecting coil units generating electricity by reacting with magnets according to variable wind speeds.

Claims (2)

In the electric generator of the wind power generator is provided with a plurality of wings on the outer circumference to convert the mechanical energy generated from the rotating cylinder rotated by the force of the wind into electrical energy to generate electricity, A plurality of magnets are installed so as to rotate together with the rotating cylinder at the lower end of the rotating cylinder and have a circular array structure, and the circularly arranged magnets are arranged to have the same center of rotation as the center of rotation of the rotating cylinder, and adjacent magnets. A magnet group consisting of different polarities disposed so as to face the inside of the rotating cylinder; At the lower end of the magnets are arranged to form a concentric circle with the magnets and installed on a fixed member installed on a fixed shaft for supporting the rotation of the rotating cylinder to approach the magnets, gradually consisting of a coil having a large diameter and long length A plurality of coil units generating different energy; Wind speed detection unit for detecting the magnitude of the wind speed; A power storage unit storing electricity generated by the plurality of coil units; And a terminal unit electrically connecting the respective coil units and the power storage unit to determine and connect the coil units connected to the power storage unit according to the wind speed sensed by the wind speed detection unit. Variable electricity generator. According to claim 1, wherein the magnets constituting the magnet group, Variable electricity generating device of the wind turbine, characterized in that inserted into the lower end of the rotating cylinder to be exposed without protruding from the bottom of the rotating cylinder.

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