JP3763841B1 - Power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generator capable of increasing an electromotive force to be generated without increasing the scale of the device.
A wind power piezoelectric device that generates an electromotive force in a coil C by changing a magnetic flux passing through the coil C, and includes permanent magnets 13a and 13b that generate the magnetic flux passing through the coil C. Moreover, it has the permanent magnet 12 which is installed in magnetic circuit B1 formed with the magnetic flux which permanent magnets 13a and 13b generate | occur | produce, and generates the magnetic flux of the same direction as the magnetic flux which permanent magnets 13a and 13b generate | occur | produce.
[Selection] Figure 1

Description

  The present invention relates to a power generation apparatus that generates power by changing a magnetic flux passing through a coil and generating a current in the coil.

  In recent years, in response to demands for reduction of carbon dioxide emissions, reduction of power consumption as environmental measures, and rising expectations for power generation devices due to liberalization of power, for example, during solar power generation, hydroelectric power generation, waste treatment Power generation using heat has started. The country is also trying to spread these technologies by establishing a subsidy system as a part of global warming countermeasures.

  Under such circumstances, there is an increasing interest in wind power generation, and attempts are being made to build large-scale facilities throughout the country to generate power and commercialize it. Looking at the trends in wind power generators, there are many large-scale and small-scale devices, but the development of medium-scale power generators is delayed.

  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 due to the fact that it is mainly used as an auxiliary power source. In addition, when considering maintenance at home, it is considered that it is difficult to maintain unless it is small.

  Although it is small in shape, it is necessary to increase the efficiency of the wind power generation machine itself in order to provide a certain level of power generation capability. As its method, it is known as a basic principle that the magnetic flux passing through the power generation coil is increased to increase the magnetic flux density, or the amount of change of the magnetic flux passing through the coil is increased.

  A number of methods have been proposed for increasing the magnetic flux density. For example, the shape of the yoke constituting the power generation device has been devised, the shape of the magnet portion is designed, or a ferromagnetic material has been used. In recent years, since materials used for magnets have advanced, materials having magnetic anisotropy have been found. For example, a rare earth cobalt magnet can be magnetized in a direction perpendicular to a flat plate while having a flat plate shape.

As a result of such technological advances, the shape of the yoke constituting the wind turbine generator can be produced in a shape that could not be realized in the past, and a rare earth magnet flat plate is arranged on the magnet portion at the tip of the yoke. (Patent Document 1).
JP 2002-320364 A

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

  This invention is made | formed in view of the said situation, The objective is to provide the electric power generating apparatus which can enlarge the electromotive force to generate | occur | produce, without enlarging the scale of an apparatus.

The present invention has been made to solve the above problems, and the invention according to claim 1 is characterized in that the U-shaped yoke and the U-shaped yoke have the same direction of the generated magnetic flux. One passing through the inside of the U-shaped yoke including magnetic flux generated between the first and second permanent magnets installed facing each other inside the both ends and the first and second permanent magnets A third permanent magnet provided in a central portion of the U-shaped yoke so as to generate a magnetic flux in the same direction as the magnetic flux in the loop-shaped magnetic circuit in the loop-shaped magnetic circuit; The magnetic flux generated between the first permanent magnet and the coil installed so that the axis is parallel to the magnetic flux generated between the first and second permanent magnets and the first and second permanent magnets. The yoke so as to traverse the coil in a direction perpendicular to the axis of the coil. And a rotating part that moves the serial first to third permanent magnets, a power generation apparatus characterized by generating an electromotive force to the coil by changing the magnetic flux penetrating the coil.

The invention described in claim 2 uses any one of a neodymium iron magnet, an iron boron magnet, and a rare earth cobalt magnet as the first to third permanent magnets. Device.

The invention according to claim 3 is the power generation device according to claim 1 or 2 , wherein the coil is an air-core coil .

The power generator according to any one of claims 1 to 3 , wherein the first and second permanent magnets are plate-like permanent magnets. is there.

The invention according to claim 5 is the power generator according to any one of claims 1 to 4, characterized in that the U-shaped yoke is made of iron .

In the present invention, not only the first and second permanent magnets that generate the magnetic flux passing through the inside of the coil are provided, but also a third magnetic flux that generates the magnetic flux in the same direction as the magnetic flux generated by the first and second permanent magnets . Permanent magnets were installed in the magnetic circuit.
Thereby, since the magnetic flux density in the space | gap which a coil passes the inside of a magnetic circuit can be increased, the electromotive force which generate | occur | produces in a coil can be increased, without enlarging the scale of an apparatus.

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 Y of a wind turbine generator according to an embodiment of the present invention. The yoke Y is composed of a back yoke block 11 (11a, 11b, 11c, 11d) and permanent magnets 12, 13 (13a, 13b).
As the material of the back yoke blocks 11a, 11b, 11c, and 11d, iron or the like that is a ferromagnetic material can be used. Moreover, as a material of the permanent magnets 12, 13a, 13b, a neodymium iron magnet, an iron boron magnet, a rare earth cobalt magnet, or the like can be used.

FIG. 2 is an exploded perspective view of the yoke Y according to the present embodiment.
The back yoke block 11a has a rectangular plate shape. Further, the back yoke block 11d has the same shape as the back yoke block 11a.
The back yoke block 11b has a rectangular parallelepiped columnar shape. Further, the back yoke block 11c has the same shape as the back yoke block 11b.
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.

The surface m1 of the back yoke block 11a is bonded to the south pole surface m2 of the permanent magnet 13a. Further, the surface m3 of the back yoke block 11d is bonded to the N pole surface m4 of the permanent magnet 13b.
Further, the surface m6 of the back yoke block 11b 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. Yes.

  The surface m9 of the back yoke block 11a and the surface m10 of the back yoke block 11d are in a state where the surface m11 of the permanent magnet 13a and the surface m12 of the permanent magnet 13b face each other, and the surface m13 of the back yoke block 11b They are respectively bonded to the surface m14 of the yoke block 11c.

Returning to FIG. 1, the back yoke blocks 11 a to 11 d are fixed to the wind power generator by nonmagnetic brackets 14 (14 a and 14 b) and a connection ring 15, respectively.
As shown in FIG. 1, a loop-shaped magnetic circuit B1 is formed inside the back yoke blocks 11a to 11d and the permanent magnets 12, 13a, 13b by the magnetic flux generated by the permanent magnets 13a, 13b. Further, the magnetic flux B generated by the permanent magnet 12 forms a loop-shaped magnetic circuit B2. The permanent magnet 12 is installed so that the magnetic flux directions of the magnetic circuit R1 and the magnetic circuit R2 are the same. Therefore, the magnetic flux density inside the back yoke blocks 11a to 11d and the permanent magnets 12, 13a, 13b is increased.

  A space 16 exists in a region sandwiched between the back yoke block 11a and the back yoke block 11d. In the present embodiment, when the yoke Y moves, the coil C and the coil holder 18 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 turbine generator supplies electric power to the outside using this current.

  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. A plurality of yokes Y (Y1 to Y24) are arranged radially at equal intervals on the circumference of the rotating portion 19 that is a predetermined distance away from the central axis 20.

  In the present embodiment, a case where a total of 24 yokes Y are installed in the rotating unit 19 will be described. The yokes Y1, Y3, Y5, Y7, Y9, Y11, Y13, Y15, Y17, Y19, Y21, and Y23 are installed in the rotating unit 19 with the side surface on the back yoke block 11a side facing upward. Therefore, these yokes Y generate magnetic fluxes from the front side to the back side in FIG.

  On the other hand, the yokes Y2, Y4, Y6, Y8, Y10, Y12, Y14, Y16, Y18, Y20, Y22, and Y24 are installed in the rotating unit 19 with the side surface on the back yoke block 11d side facing upward. Therefore, these yokes Y generate magnetic fluxes from the back side of the paper of FIG. 3 toward the front side of the paper.

  The plurality of coils C are installed in the wind turbine generator so that the axis of the coil C is parallel to the direction perpendicular to the paper surface. This embodiment demonstrates the case where a total of 12 coils C (C1-C12) are installed in a wind power generator. The coil C has a rounded trapezoidal opening, and is installed in the wind power generator with the upper base side of the trapezoid facing the central axis 20. Coil C of this embodiment is being fixed to the wind power generator, and even if rotation part 19 rotates, coil C does not move.

  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 unit 19 rotates 15 degrees around the central axis 20, the magnetic flux passing through the coil C is "magnetic flux from the front side to the back side in FIG. 3" and "from the back side to the front side in FIG. Since the magnetic flux passing through the coil C changes with time, the electromotive force is generated in the 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. In addition, since the structure of the rotation part 19 is the same structure on both sides of the rotating shaft 20, only the specific structure of the upper half from the rotation part 19 is shown here, and about the specific structure of the lower half, The illustration is omitted.

Next, the effect when the wind power generator according to the present embodiment is used will be described.
The magnetic flux density of the magnetic flux generated in the air gap 16 when the wind power generator of the present embodiment (FIGS. 3 and 4) is operated, and the magnetic flux of the magnetic flux generated in the air gap when the wind power generator having the conventional structure is operated. The density was compared. In addition, as a conventional wind power generator, in the wind power generator according to the present embodiment shown in FIGS. 3 and 4, the permanent magnet 12 is not provided in the yoke Y, but the region where the permanent magnet 12 is provided in the present embodiment. Experiments were performed using an apparatus constructed of the same material as the back block yokes 11a to 11d. As the permanent magnets 12, 13a, 13b, neodymium iron magnets were used.

  As a result, in the conventional wind power generator, the magnetic flux density of the air gap was 5200 (Gauss). On the other hand, in the wind turbine generator according to the present embodiment, the magnetic flux density of the air gap was 6775 (Gauss). As can be seen from this result, when the wind power generator according to the present embodiment is used, the magnetic flux density is increased by about 30% as compared with the conventional wind power generator.

Thus, if 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. 16 can increase the magnetic flux density, and accordingly, the electromotive force generated in the coil C can be increased. Therefore, in order to obtain a large electromotive force from the wind power generator, it is not necessary to make the device medium-scale or large-scale, and the manufacturing cost of the wind power generator can be suppressed.
In the wind power generator according to the present embodiment, the coil C is fixed and the rotating portion 19 where the permanent magnets 12, 13a, 13b are installed is rotated. Therefore, compared with the case where the permanent magnets 12, 13a, 13b are fixed and the coil C is rotated, the electromotive force generated in the coil C can be easily used.

In addition, although embodiment mentioned above demonstrated the case where the yoke Y was installed in a wind power generator, it is not limited to this. For example, a large electromotive force can be obtained by installing the yoke Y in another power generator such as a hydroelectric generator.
In the above-described embodiment, the case where the permanent magnet 12 is installed in the central portion of the U-shaped yoke Y farthest from the gap 16 of the magnetic circuits B1 and B2 formed in the loop shape has been described. It is not limited to such a configuration. For example, you may make it install the permanent magnet 12 in the arbitrary positions of magnetic circuit B1, B2. Besides the permanent magnets 13a and 13b installed at both ends of the U-shaped yoke Y, the number of permanent magnets 12 provided on the magnetic circuits B1 and B2 is not limited to one. You may make it install.

  In the above-described embodiment, the case where the permanent magnet 12 is installed between the back block yokes 11b and 11c has been described. However, the present invention 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, a magnetic flux may be generated in the back block yoke by passing a current through the coil to increase the magnetic flux density of the air gap 16.

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

It is sectional drawing which shows the structure of the yoke Y of the wind power generator by embodiment of this invention. It is a disassembled perspective view of the yoke Y by this embodiment. It is front sectional drawing which shows the structure of the rotation part 19 of the wind power generator by this embodiment. It is side surface sectional drawing which shows the structure of the rotation part 19 of the wind power generator by this embodiment.

Explanation of symbols

11 (11a, 11b, 11c, 11d) ... back yoke block, 12 (12, 13a, 13b) ... permanent magnet, Y ... yoke, 14 (14a, 14b) ... non-magnetic bracket, DESCRIPTION OF SYMBOLS 15 ... Connection ring, 16 ... Space | gap, 18 ... Coil holder, 19 ... Rotation part, 20 ... Center axis, C (C1-C12) ... Coil, Y (Y1-Y24) )···yoke

Claims (5)

A U-shaped yoke,
First and second permanent magnets installed facing each other inside both ends of the U-shaped yoke so that the directions of generated magnetic fluxes are the same;
The direction of the magnetic flux in one loop-shaped magnetic circuit including a magnetic flux generated between the first and second permanent magnets and passing through the U-shaped yoke, A third permanent magnet provided at the center of the U-shaped yoke so as to generate magnetic flux in the same direction;
A coil installed such that its axis is parallel to the magnetic flux generated between the first and second permanent magnets;
The yoke and the first to third permanent magnets are moved so that the magnetic flux generated between the first and second permanent magnets traverses the coil in a direction perpendicular to the coil axis. And a rotating part
An electromotive force is generated in the coil by changing a magnetic flux penetrating the coil. 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 to third permanent magnets .   The power generator according to claim 1, wherein the coil is an air-core coil.   The power generator according to any one of claims 1 to 3, wherein the first and second permanent magnets are plate-like permanent magnets.   The power generator according to any one of claims 1 to 4, wherein the U-shaped yoke is made of iron.

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