WO2007029378A1

WO2007029378A1 - Power generating device

Info

Publication number: WO2007029378A1
Application number: PCT/JP2006/310144
Authority: WO
Inventors: Yoriyoshi Uchikawa; Yasuki Shiomi; Yoshiko Ueda; Houbun Shiomi; Shigeaki Tsuruoka; Kammei Kuwabara
Original assignee: Taiyo Electric Works, Ltd.; Hoeidenken Co., Ltd.; Tigre-Takumi Co., Ltd.
Priority date: 2005-09-07
Filing date: 2006-05-22
Publication date: 2007-03-15
Also published as: JP3763841B1; JP2007074820A; CN101273512A

Abstract

Provided is a power generating device which permits a coil to generate an electromotive force by changing a magnetic flux passing through the coil. The power generating device is characterized in that the device is provided with a first magnetic flux generating means for generating the magnetic flux passing through the coil; and a second magnetic flux generating means, which is arranged inside a magnetic circuit formed by the magnetic flux generated by the first magnetic flux generating means and generates a magnetic flux in the same direction as the magnetic flux generated by the first magnetic flux generating means.

Description

Specification

Power generator

Technical field

TECHNICAL FIELD [0001] The present invention relates to a power generator that generates electricity by changing a magnetic flux passing through a coil and generating a current in the coil.

This application claims priority to Japanese Patent Application No. 2005-259041 filed on Sep. 7, 2005, the contents of which are incorporated herein by reference.

Background art

[0002] In recent years, in response to demands for reducing carbon dioxide emissions, reducing power consumption as an environmental measure, and increasing expectations for power generation devices due to the liberalization of power, for example, solar power generation, hydropower Power generation and power generation using heat during waste disposal have begun. The country is also trying to spread these technologies by establishing a subsidy system as a part of global warming countermeasures.

[0003] Under such circumstances, there is an increasing interest in wind power generation, and attempts have been made to construct large-scale facilities throughout the country to generate power and commercialize it. Looking at the trends in wind power generation equipment, there are many large-scale equipment and small-scale equipment, but development of medium-scale power generation equipment is delayed.

[0004] Such a situation is likely to be established as a business if it is a large wind power generator, but it is limited to small wind power generators that can be easily installed at home, etc. This is because power supply, that is, use as an auxiliary power source is mainly used. In addition, considering the maintenance at home, it is considered that it is difficult to maintain because it is small.

[0005] A force that is small in shape In order to provide a predetermined power generation capacity, a high-efficiency power of the wind power generation machine itself is required. As its method, increasing the magnetic flux passing through the power generation coil to increase the magnetic flux density, or increasing the amount of change in the magnetic flux passing through the coil, is known as a basic principle.

[0006] Numerous methods have been proposed for increasing the magnetic flux density. For example, devise the shape of the yoke that constitutes the power generation device, design the shape of the magnet part, It has been practiced to use sex material. In recent years, as materials used for magnets have advanced, materials with magnetic anisotropy have been gaining attention. For example, a rare earth cobalt magnet can be magnetized in a direction perpendicular to a flat plate while having a flat plate shape.

[0007] With the advancement of such technology, even if the shape of the yoke constituting the wind power generator is used, it is possible to produce a powerful shape that cannot be realized conventionally, and the magnet portion at the tip of the yoke It has become possible to arrange a flat plate of rare earth magnets (Patent Document 1).

Patent Document 1: JP 2002-320364 A

Disclosure of the invention

Problems to be solved by the invention

[0008] However, in the conventional technology, there is a problem that it is difficult to increase the magnetic flux density in the air gap through which the coil passes through the magnetic circuit while keeping the wind power generator in a small-scale shape.

[0009] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power generator that can increase the electromotive force to be generated without increasing the scale of the apparatus.

Means for solving the problem

[0010] The present invention has been made to solve the above-described problem, and is a power generator that generates an electromotive force in the coil by changing a magnetic flux passing through the coil. A first magnetic flux generating means for generating a magnetic flux passing through the inside, and a magnetic circuit formed by the magnetic flux generated by the first magnetic flux generating means, and the same as the magnetic flux generated by the first magnetic flux generating means And a second magnetic flux generation means for generating a magnetic flux in the direction.

[0011] Further, the power generator according to the present invention uses any one of a neodymium iron magnet, an iron boron magnet, and a rare earth cobalt magnet as the first magnetic flux generating means or the second magnetic flux generating means. Features.

[0012] Further, in the power generation device according to the present invention, a gap for changing the magnetic flux passing through the coil by passing the coil is formed in the magnetic circuit, and the second magnetic flux generating means. Is installed at a position farthest from the gap in the magnetic circuit. To do.

Furthermore, in the power generation device according to the present invention, the coil is fixed, and the first magnetic flux generation means and the second magnetic flux generation means move relative to the coil, so that the coil An electromotive force is generated.

Furthermore, the power generation device according to the present invention is a power generation device that generates an electromotive force in the coil by changing a magnetic flux passing through the coil, and generates a magnetic flux passing through the coil. A magnetic circuit formed by magnetic flux generated by the first and second permanent magnets and the first and second permanent magnets installed opposite to both ends of the yoke. A third permanent magnet is provided at the center of the U-shaped yoke and generates a magnetic flux in the same direction as the magnetic flux generated by the first and second permanent magnets.

The invention's effect

[0015] In the present invention, the second magnetic flux generation that generates the magnetic flux in the same direction as the magnetic flux generated by the first magnetic flux generation means simply by providing the first magnetic flux generation means for generating the magnetic flux passing through the inside of the coil. The means was installed in the magnetic circuit.

As a result, the magnetic flux density in the gap through which the coil passes through the magnetic circuit can be increased, so that the electromotive force generated in the coil can be increased without increasing the scale of the apparatus.

Brief Description of Drawings

FIG. 1 is a cross-sectional view showing a configuration of a yoke Y of a wind turbine generator according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a yoke Y according to the present embodiment.

FIG. 3 is a front sectional view showing a configuration of a rotating part of the wind turbine generator according to the present embodiment.

FIG. 4 is a side sectional view showing a configuration of a rotating part of the wind turbine generator according to the present embodiment. Explanation of symbols

[0017] l l (l la, l lb, l lc, l id) knock yoke block

12 Permanent magnet (2nd magnetic flux generating means, 3rd permanent magnet)

13a Permanent magnet (first magnetic flux generating means, first permanent magnet) 13b Permanent magnet (first magnetic flux generating means, second permanent magnet)

14 (14a, 14b) Non-magnetic bracket

15 Connecting ring

16 Air gap

18 Coil holder

19 Rotating part

20 Center axis

C (C1 to C12) Coil

Y (Y1-Y24) York

BEST MODE FOR CARRYING OUT THE INVENTION

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

FIG. 1 is a cross-sectional view showing a configuration of a yoke rod of a wind turbine generator (power generator) according to an embodiment of the present invention.

Yoke Υ consists of back yoke block 11 (1 la, l ib, l lc, l id), permanent magnet (second magnetic flux generating means, third permanent magnet) 12, permanent magnet (first magnetic flux generating means, The first permanent magnet) 13a and the permanent magnet (first magnetic flux generating means, second permanent magnet) 13b.

As the material of the knock yoke block l la, l lb, l lc, and l id, iron, which is a ferromagnetic material, can be used. Further, as the material of the permanent magnets 12, 13a, 13b, neodymium iron magnets, iron boron magnets, rare earth cobalt magnets, and the like can be used.

FIG. 2 is an exploded perspective view of the yoke Y according to the present embodiment.

The knock yoke block 11a has a rectangular plate shape. The knock yoke block 1 Id has the same shape as the back yoke block 1 la!

The knock yoke block l ib has a rectangular parallelepiped columnar shape. The knock yoke block 1 lc has the same shape as the back yoke block 1 lb! /.

The permanent magnet 12 has a cylindrical shape. The permanent magnet 13a has a rectangular plate shape. The permanent magnet 13b has the same shape as the permanent magnet 13a.

[0020] The surface ml of the knock yoke block 11a is bonded to the surface m2 of the south pole of the permanent magnet 13a. . Further, the surface m3 of the knock yoke block l id is bonded to the N pole surface m4 of the permanent magnet 13b.

Further, the surface m6 of the back yoke block l ib is bonded to the N pole surface m5 of the permanent magnet 12, and the surface m8 of the back yoke block 11c is bonded to the S pole surface m7 of the permanent magnet 12. Has been.

[0021] Surface m9 of knock yoke block 11a is bonded to surface ml3 of back yoke block l ib, and surface mlO of back yoke block l id is bonded to surface ml 4 of knock yoke block 11c. Has been. At this time, the surface mi l of the permanent magnet 13a bonded to the knock yoke block l id and the surface ml2 of the permanent magnet 13b bonded to the back yoke block l id face each other! / It has been.

Returning to FIG. 1, the knock yoke blocks l la to l ld are fixed to the wind power generator by nonmagnetic brackets 14 (14 a and 14 b) and a coupling ring 15, respectively.

As shown in FIG. 1, a loop-shaped magnetic circuit B1 is formed inside the back yoke blocks lla to lld and the permanent magnets 12, 13a, 13b by the magnetic flux generated by the permanent magnets 13a, 13b. Further, a loop-shaped magnetic circuit B2 is formed by the magnetic flux generated by the permanent magnet 12. The permanent magnet 12 is disposed so that the magnetic flux directions of the magnetic circuit B1 and the magnetic circuit B2 are the same. Therefore, the magnetic flux density inside the back yoke blocks lla to lld and the permanent magnets 12, 13a, and 13b is increased.

[0023] A gap 16 exists in a region between the back yoke block 11a and the back yoke block l id. In the present embodiment, when the yoke Y moves, the coil C and the coil holder 18 that are fixed to the wind power generator pass through the gap 16. As a result, the magnetic flux generated between the north pole of the permanent magnet 13a and the south pole of the permanent magnet 13b crosses the inside of the coil C. Therefore, an electromotive force is generated, and a current flows through the coil C. The wind power generator uses this current to supply power to the outside.

FIG. 3 is a front sectional view showing the configuration of the rotating unit 19 of the wind turbine generator according to the present embodiment. The rotating part 19 has a circular shape and can rotate around the central axis 20. In the rotating part 19, a plurality of yokes Y (Y1 to Y24) are radially arranged at equal intervals on a circumference separated from the central axis 20 by a predetermined distance. In the present embodiment, a case where a total of 24 yokes Y are installed on the rotating unit 19 will be described. The yokes Yl, Υ3, Υ5, Υ7, Υ9, Yll, 、 13, 、 15, 、 17, Υ19, 、 21, and Υ23 are installed in the rotary unit 19 with the side surface on the back yoke block 11a side facing upward. Therefore, these yokes Y generate magnetic fluxes that are directed from the front side to the back side in FIG.

[0026] On the other hand, the yoke Y2, Υ4, Υ6, Υ8, Υ10, Υ12, Υ14, Υ16, Υ18, Υ20, Υ22, and Υ24 are installed in the rotating unit 19 with the side surface on the back yoke block id side facing up. It has been done. Therefore, these yokes Y generate a directional magnetic flux on the front side as well as on the back side in FIG.

[0027] Further, the plurality of coil C forces are installed in the wind power generator so that the axes of the coils C are parallel to the direction perpendicular to the paper surface. In this embodiment, a case where a total of 12 coils C (C1 to C12) are installed in the wind turbine generator will be described. Coil C has a rounded trapezoidal opening, and is installed in the wind turbine generator with the upper base of the trapezoid facing the central axis 20. The coil C of this embodiment is fixed to the wind power generator, and the coil C does not move even if the rotating part 19 rotates!

[0028] A blade (not shown) is attached to the rotating unit 19, and when the blade receives wind, the rotating unit 19 rotates around the central axis 20. As a result, the coil C passes through the gap 16 of the yoke Y. Each time the rotating part 19 rotates 15 degrees around the central axis 20, the magnetic flux passing through the coil C is changed to "magnetic flux directed from the front side to the back side in Fig. 3" and "back side force in Fig. 3 “Magnetic flux directed to the front side” is repeated alternately, and the magnetic flux passing through coil C changes with time, so an electromotive force is generated in coil C. The electric power generated in the coil C is taken out of the wind turbine generator through a circuit not shown.

FIG. 4 is a side sectional view showing the configuration of the rotating unit 19 of the wind turbine generator according to the present embodiment. This figure shows the configuration of the AA cross section of FIG. Since the structure of the rotating part 19 is the same with the rotating shaft 20 in between, only the specific structure of the upper half from the rotating part 19 is shown here, and the specific structure of the lower half is shown. The illustration is omitted.

Next, the effect when using the wind turbine generator according to the present embodiment will be described.

Generated in the gap 16 when the wind turbine generator of this embodiment (FIGS. 3 and 4) is operated. The magnetic flux density of the magnetic flux was compared with the magnetic flux density of the magnetic flux generated in the air gap when the conventional wind power generator was operated. As a conventional wind turbine generator, in the wind turbine generator according to this embodiment shown in FIGS. 3 and 4, the permanent magnet 12 is not provided in the yoke Y, but the permanent magnet 12 is provided in this embodiment. The experiment was conducted using an apparatus constructed of the same material as that of the back block yoke 1 la to l Id. As the permanent magnets 12, 13a and 13b, neodymium iron magnets were used.

As a result, in the conventional wind power generator, the magnetic flux density in the air gap was 5200 gauss.

In contrast, in the wind turbine generator according to the present embodiment, the magnetic flux density in the air gap was 6775 gauss. As can be seen from this result, when the wind turbine generator according to the present embodiment is used, the magnetic flux density is increased by about 30% compared to the conventional wind turbine generator.

[0032] Thus, when the wind power generator according to the present embodiment is used, the magnetic circuit B2 formed by the permanent magnet 12 is added to the magnetic circuit B1 formed by the permanent magnets 13a and 13b. Can increase the magnetic flux density in the gap 16 through which the coil passes, and the electromotive force generated in the coil C can be increased accordingly. Therefore, in order to obtain a large electromotive force from the wind turbine generator, it is not necessary to make the device medium-scale or large-scale, and the manufacturing cost of the wind turbine generator can be suppressed.

Further, in the wind turbine generator according to the present embodiment, the coil C is fixed, and the rotating unit 19 in which the permanent magnets 12, 13a, 13b are installed is rotated. Therefore, the electromotive force generated in the coil C can be used more easily than in the case where the permanent magnets 12, 13a, 13b are fixed and the coil C is rotated.

In the above-described embodiment, the case where the yoke Y is installed in the wind turbine generator has been described. However, the present invention is not limited to this. For example, a large electromotive force can be obtained by installing the yoke Y in another power generation device such as a hydroelectric power generation device.

In the above-described embodiment, the case where the permanent magnet 12 is installed at the center of the U-shaped yoke Y farthest from the gap 16 gaps of the magnetic circuits Bl and B2 formed in a loop shape has been described. However, the present invention is not limited to such a configuration. For example, the permanent magnet 12 may be installed at an arbitrary position of the magnetic circuits Bl and B2. In addition to the permanent magnets 13a and 13b installed at both ends of the U-shaped yoke Y, permanent magnets provided on the magnetic circuits Bl and B2 are also provided. The number of permanent magnets 12 is not limited to one.

In the embodiment described above, the force described for the case where the permanent magnet 12 is installed between the knock block yokes ib and 11c is not limited to such a configuration. For example, the permanent magnet 12 may also be constituted by a back block yoke, and a coil may be wound around the back block yoke. Then, by passing a current through the coil, a magnetic flux is generated in the knock block yoke, and the magnetic flux density of the air gap 16 may be increased.

As described above, the embodiment of the present invention has been described in detail with reference to the drawings. The specific configuration is not limited to this embodiment, and includes design and the like within the scope of the present invention. It is.

Industrial applicability

The present invention can be suitably used for various power generators such as wind power generators and hydroelectric power generators.

Claims

The scope of the claims

[1] A power generator that generates an electromotive force in the coil by changing a magnetic flux passing through the coil,

First magnetic flux generating means for generating a magnetic flux passing through the coil;

A second magnetic flux generating means installed in a magnetic circuit formed by the magnetic flux generated by the first magnetic flux generating means and generating a magnetic flux in the same direction as the magnetic flux generated by the first magnetic flux generating means;

A power generator characterized by comprising:

[2] The power generator according to claim 1, wherein any one of a neodymium iron magnet, an iron boron magnet, and a rare earth cobalt magnet is used as the first magnetic flux generation means.

[3] The power generator according to claim 1, wherein any one of a neodymium iron magnet, an iron boron magnet, and a rare earth cobalt magnet is used as the second magnetic flux generation means.

[4] The magnetic circuit is formed with a gap for changing the magnetic flux passing through the coil through the coil,

2. The power generator according to claim 1, wherein the second magnetic flux generation means is installed at a position farthest from the gap in the magnetic circuit.

[5] The coil is fixed,

The first magnetic flux generating means and the second magnetic flux generating means move relative to the coil to generate an electromotive force in the coil;

The power generation device according to claim 1, wherein:

[6] A power generator that generates an electromotive force in the coil by changing a magnetic flux passing through the coil,

First and second permanent magnets that generate magnetic flux passing through the inside of the coil and are installed facing each other at both ends of the U-shaped yoke;

Magnetic flux generated by the first and second permanent magnets installed in the center of the U-shaped yoke in the magnetic circuit formed by the magnetic flux generated by the first and second permanent magnets A third permanent magnet that generates a magnetic flux in the same direction as

A power generator characterized by comprising: