JP4324294B2 - Small wind power generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a small wind power generator that is portable and that generates power by rotating a windmill with wind power.
[0002]
[Prior art]
There is utility model registration No. 3054811 as an example of this wind power generator. The generator described in the publication includes a windmill having blades and a hub, a power shaft directly connected to the windmill, a speed increaser, a bearing, and a generator, and a support that fixes and supports these on the ground. The output shaft of the gearbox is attached to the rotor of the generator. The generator coil is fixed to the main body of the gearbox.
[0003]
The windmill rotates by receiving wind on the blades, and this rotation is transmitted to the gearbox through the power shaft. In the speed increaser, the rotation of the power shaft is further increased to rotate the rotor of the generator. As the rotor rotates, electric power is induced in the coil of the generator to generate power.
[0004]
[Problems to be solved by the invention]
However, the wind power generator has a large rotor for high output, and a speed increaser and a generator are connected to the power shaft. It is difficult to carry and move by human power, which can be supported unless it is a fixed solid support.
[0005]
In addition, since a speed increaser that requires a predetermined torque or more to start rotating is connected to the power shaft, the windmill does not rotate unless the wind power is more than a certain level, so power generation is not possible with weak wind, We cannot plan effective use of weak wind.
[0006]
The present invention has been made in view of such circumstances, and is capable of highly efficient power generation with reduced transmission loss, is small and lightweight, and effectively uses natural energy without wasting energy of weak winds. An object of the present invention is to provide a small wind power generator that can generate electricity.
[0007]
[Means for Solving the Problems]
The small wind power generator according to claim 1 is provided with a power generation means for converting wind power into electric power and a rectification means for rectifying the electric power in a single unit. The power generation means includes a cylindrical iron core, an iron core A shaft hole drilled through the center, a plurality of slots opened in a U-shape in the outer circumferential direction of the iron core, a stator iron core having a coil wound around the slot, a bowl-shaped yoke, A shaft that stands up from the center of the inner bottom of the yoke, a cylinder that can be arranged on the outer periphery of the stator core, a magnet in which S poles and N poles are alternately formed in the circumferential direction, and is fitted on the inner wall of the yoke; It has a windmill having blades provided and a base on which a support arm protrudes, the end of the stator core is fixed to the support arm, and the shaft of the windmill penetrates the shaft hole of the stator core In this state, it is pivotally supported by the support arm so that the windmill receives the wind and rotates. More magnet and wherein the resulting power rotated.
[0008]
The small wind power generator according to claim 2 is characterized in that the wind power generation unit includes a secondary battery for storing electric power.
[0009]
The small wind power generator according to claim 3 is characterized in that the wind power generation unit includes output means for outputting electric power.
[0010]
The small wind power generator according to claim 4 is characterized in that the wind power generation unit includes output means for outputting electric power.
[0011]
The small wind power generator according to claim 5 is characterized in that the wind power generation unit includes a transforming means for stepping up or down the electric power.
[0012]
The small wind power generator according to claim 6 is characterized in that the secondary battery is detachably attached to the wind power generation unit.
[0013]
The small wind power generator according to claim 7 is characterized in that the blades are detachably provided on the yoke.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a front view of a small wind power generator according to the present invention. 2 is an electrical wiring diagram of the same, and FIG. 3 is a schematic sectional view taken along the line III-III in FIG. 4 is an explanatory view showing a method of assembling the windmill shown in FIG. 1, and FIG. 5 is a cross-sectional view of the windmill. FIG. 6 is a perspective view of the stator core, and FIG. 7 is a top view of the stator core. FIG. 8 is an enlarged sectional view taken along line VIII of FIG. 3, and FIG. 9 is an electric circuit diagram thereof.
[0015]
1 to 9, a small wind power generator 1 is a power generator that can be carried and generates power by converting wind power into electric power. The wind power generation unit 5 is a unit for performing wind power generation formed by rectangular parallelepiped casings 10 and 11 having a length and width of about 120 mm and a thickness of about 25 mm. The weight of the wind power generation unit 5 is about 300 g. The wind power generation unit 5 includes a cylindrical body 10a that opens from the front to the back and penetrates. The cylinder 10a is formed as a wind passage. The wind power generation unit 5 is a single unit, and includes a secondary battery 17, a substrate 18, and an output connector 16, which will be described later. -Integrated output function. In other words, power generation / charging / output is possible only with the wind power generation unit 5, and no other device is required.
[0016]
Four support arms 11a extend from the housing 11 toward the center of the cylinder 10a and are connected at the center of the cylinder 10a. That is, the housing 11 is a base for the support arm 11a. An annular support protrusion 11b is provided at the center where the support arm 11a is connected. The upper surface of the support arm 11a is covered with a support arm cover 10b protruding from the cylindrical body 10a in the center direction. An electric wire 22a extending from a coil 22, which will be described later, passes between the support arm 11a and the support arm cover 10b and is guided to a space in the housings 10 and 11.
[0017]
The windmill 20 has a bowl-shaped yoke 23, a shaft 24 erected from the center of the inner bottom of the yoke 23, and is formed in a cylindrical shape in which S and N poles are alternately formed and inserted into the inner wall of the yoke 23. A magnet member 25 is provided, and on the outer side of the yoke 23, a blade member 27 having four blades 29 having a total area of about 60 cm ² is fitted on the outer periphery of a bowl-shaped support rod 28.
[0018]
The stator core 21 is made by stacking several disc-shaped iron plates 21a. The iron plate 21a has a shaft hole 21c formed so as to penetrate the center and a plurality of slots 21b opened in a U-shape in the outer peripheral direction. An electric wire 22a is wound around a slot 21b of an iron plate 21a that forms the stator core 21, and a coil 22 is formed.
[0019]
A substrate 18 and a secondary battery 17 are housed inside the wind power generation unit 5. On the substrate 18, diodes D1 to D6, which are rectifying means for rectifying the generated electricity, and a capacitor C1 are mounted. The secondary battery 17 (indicated by the symbol BT in the circuit diagram of FIG. 9) is for storing the generated power. The secondary battery 17 is detachably provided inside the wind power generation unit 5, and is mounted in the wind power generation unit 5 by opening the battery lid 11 c of the housing 11. Further, the output connector 16 provided on the left side surface of the wind power generation unit 5 is a round pin-shaped connector which is an output means for outputting electric power to other than the other wind power generation units 5. The secondary battery 17 is not limited to a chargeable / dischargeable battery such as a nickel cadmium battery, and may be any element having a charge / discharge function, such as a super capacitor.
[0020]
The assembly method of the small wind power generator 1 in a present Example is demonstrated. Initially, the assembly method of the windmill 20 is demonstrated. First, as shown by an arrow a in FIG. 4, a magnet 25 having a cylindrical shape in which S poles and N poles are alternately formed in the circumferential direction is formed into a bowl-shaped inner wall of a yoke 23 on which a shaft 24 stands from the center of the inner bottom. To be inserted. The yoke 23 is shaped as indicated by the arrow b in FIG. Then, as shown in FIG. 5, the blade member 27 is fitted on the outer side of the yoke 23. Thereby, the windmill 20 is completed. In the present embodiment, the cylindrical magnet 25 in which the S poles and the N poles are alternately formed in the circumferential direction is used. However, the present invention is not limited to this. The S pole and the N pole may be alternately arranged in the circumferential direction of the inner wall.
[0021]
Next, a method for assembling the stator core 21 will be described. First, an iron plate is die-cut with a press machine to form an iron plate 21a having a disk shape and having a shaft hole 21c at the center and a plurality of slots 21b opened in a U-shape in the outer peripheral direction. Then, the iron plates 21a are overlapped to form an iron core having a thickness of about 6 mm. Subsequently, as shown in FIG. 7, a coil 22 is formed by winding an electric wire 22a around a slot 21b. The circuit of the coil 22 has a three-phase shape as shown in FIG.
[0022]
Next, the attachment of the stator core 21 and the wind turbine 20 will be described with reference to FIG. First, the inner periphery of the shaft hole 21c of the stator core 21 and the outer periphery of the support protrusion 11b are brought into close contact to fix the stator core 21 to the support protrusion 11b. In addition, bearings 26a and 26b are inserted into the inner periphery of the shaft hole 21c and the support protrusion 11b that cannot reach the support protrusion 11b. Then, the wind turbine 20 is inserted so that the shaft 24 is in close contact with the bearings 26a and 26b. By fitting the retaining ring 24a to the end of the shaft 24 protruding from the bearing 26b, the windmill 20 is pivotally supported by the support protrusion 11b. A magnet 25 is disposed so as to be rotatable on the outer periphery of the stator core 21, and the wind turbine 20 and the stator core 21 constitute power generation means. As described above, in the present embodiment, the bearings 26a and 26b are used as the bearings of the shaft 24. However, the present invention is not limited to this. For example, a metal bearing formed of an oil-containing alloy or the like may be used.
[0023]
When the wind passing through the cylindrical body 10b hits the blades 29 and the windmill 20 rotates, the magnet 25 rotates around the outer periphery of the stator core 21, and electric power is induced in the coil 22 to generate power. The generated power is rectified by the diodes D <b> 1 to D <b> 6 and stored in the secondary battery 17. By connecting electric devices such as a radio and an electric light to the output connector 16, these electric devices are operated by the electric power generated by the small wind power generator 1. The wind power generation unit 5 of the present embodiment includes both the secondary battery 17 and an output connector 16 that is an output means. And the electric power generated in the state with a wind is stored in the secondary battery 17, and when there is no wind, the stored electric power can be output outside via the output connector 16. Further, by providing the secondary battery 17 in a detachable manner, the secondary battery 17 that is charged and taken out in the wind power generation unit 5 can be used as a battery for other electric devices, and a current supply means such as a cable is provided. It is possible to easily supply power to other electric devices without using them. However, the wind power generation unit 5 of the present embodiment does not necessarily function without both the secondary battery 17 and the output connector 16, and may not have the secondary battery 17, and includes the output connector 16. Even if it is not, it is possible to supply electric power to other electric devices via the secondary battery 17.
[0024]
The amount of power generated by this power generation means is about 4V in voltage and about 30mA in current. Moreover, the magnitude | size and electric power generation amount of the housing | casings 10 and 11, the blade | wing 29, and the stator core 21 which are shown in a present Example are an example to the last, and the portable magnitude | size as shown in a present Example is natural. Needless to say, various modifications can be made without departing from the scope of the inventions of the present invention as long as they can be transported and moved by human power.
[0025]
According to the small wind power generator 1 according to the present embodiment, the inside of the windmill 20 is provided by providing the magnet 25 having a cylindrical shape and alternating S poles and N poles in the circumferential direction inside the yoke 23 having the blades 29. Is a rotating magnet. Moreover, since the stator core 21 is provided inside the windmill 20, the windmill 20 itself is part of the power generation means. For this reason, the length of the shaft 24, which is the rotation transmission means, can be kept short, and power can be directly generated by the wind force received by the blades without using an additional device such as an increase / decrease device, thereby reducing transmission loss and high efficiency. Power generation is possible.
Wind can be received effectively by the blades 29 provided at a portion far from the rotation center of the windmill 20, and torque can be effectively obtained, and power is generated by the magnet 25 and the coil 22 provided at a portion near the rotation center of the windmill 20. As a result, a small and lightweight wind power generator can be obtained.
[0026]
Further, since no additional device such as an increase / decrease device is required, power generation is possible even with weak winds by suppressing the rotational torque of the windmill 20, and effective use of natural energy is possible without wasting the energy of weak winds. Is possible.
Further, since the power generation means and the rectification means are provided in the wind power generation unit 5 that is a single unit, transportation and installation are easy.
[0027]
Further, since the yoke 23 and the blade member 27 are separate members, the blade member 27 having an appropriate blade 29 is selected and attached according to the magnitude of the required power and the strength of the wind during power generation. Therefore, efficient power generation is possible.
[0028]
Although not provided in the wind power generation unit 5 of the present embodiment, for example, a DC-DC converter such as a DC-DC converter can be provided in the wind power generation unit 5 with a transformer for stepping up or down the voltage. . By providing the transformer means, it is possible to obtain electric power of an arbitrary voltage, and the secondary battery 17 having a different charging voltage can be used, and various electric devices are not limited to the power supply voltage. It becomes possible to drive.
[0029]
【The invention's effect】
According to the first aspect of the present invention, the inside of the windmill is a rotating magnet because a magnet having a cylindrical shape and alternating S poles and N poles formed in the circumferential direction is provided inside the yoke having blades. . Further, since the stator core is provided inside the windmill, the windmill itself is a part of the power generation means. For this reason, the length of the shaft, which is the rotation transmission means, can be kept short, and power can be directly generated by the wind force received by the blades without using an additional device such as an increase / decrease device, thereby reducing transmission loss and high efficiency. Power generation is possible.
Because it is possible to effectively obtain torque by receiving wind with the blades provided in the part far from the rotation center of the windmill, and to generate power with the magnet and coil provided in the part near the rotation center of the windmill, It became possible to obtain a small and lightweight wind power generator.
In addition, since no additional devices such as speed increase / decrease devices are required, power generation is possible even with weak winds by suppressing the rotational torque of the windmill, and natural energy can be used effectively without wasting the energy of weak winds. It is.
Further, since the power generation means and the rectification means are provided in a single unit, transportation and installation are easy.
[0030]
According to the second aspect of the present invention, since the secondary battery is provided, by storing the electric power generated when the wind is blowing in the secondary battery, the electric power can be supplied even in the absence of the wind. Is possible.
[0031]
According to the invention of claim 5, since it has the transformer means, it is possible to obtain electric power of an arbitrary voltage, and it is possible to drive various electric devices without being limited to the power supply voltage.
Also, secondary batteries with different charging voltages can be charged.
[0032]
According to the invention of claim 6, since the secondary battery is detachable, the secondary battery that has been charged and taken out can be used as a battery for other electrical devices, and an energizing means such as a cable is used. In addition, it is possible to easily supply power to other electric devices.
[0033]
According to the seventh aspect of the present invention, since the blades are detachable from the yoke, the efficiency can be improved by selecting and attaching appropriate blades according to the required power level and the wind strength during power generation. Power generation is possible.
[Brief description of the drawings]
FIG. 1 is a front view of a small wind power generator according to the present invention.
FIG. 2 is the same electrical wiring diagram.
3 is a schematic cross-sectional view taken along line III-III in FIG.
4 is an explanatory view showing a method of assembling the windmill shown in FIG. 1. FIG.
FIG. 5 is a sectional view of the wind turbine.
FIG. 6 is a perspective view of the stator core.
FIG. 7 is a top view of the stator core.
8 is an enlarged cross-sectional view taken along line VIII in FIG.
FIG. 9 is an electric circuit diagram thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ..... small wind power generator 5 ..... wind power generation unit 10,11 ..... casing 10a ..... cylinder Body 10b ... Support arm cover 11a ... Support arm 11c ... Battery cover 17 ... Secondary battery 18 ...・ ・ ・ ・ ・ ・ ・ ・ Board 20 ・ ・ ・ ・ ・ ・ ・ ・ Windmill 21 ・ ・ ・ ・ ・ ・ ・ ・ Stator iron core 21a ・ ・ ・ ・ ・ ・ ・ ・ Steel plate 21b ・ ・ ・ ・ ・ ・ ・ ・··· Slot 21c ··· Shaft hole 22 ······················································ ·······magnet

Claims (7)

In a portable small wind power generator, a power generation means for converting wind power into electric power and a rectification means for rectifying the electric power are provided in a single unit. The power generation means includes a cylindrical iron core and the iron core. A stator core having a shaft hole drilled through the center thereof, a plurality of slots opened in a U-shape in the outer circumferential direction of the iron core, and a coil wound around the slot, and a bowl-shaped A magnet that is formed on the inner wall of the yoke in which a S pole and a N pole are alternately formed in a circumferential direction by a yoke, a shaft that stands from the center of the inner bottom of the yoke, and a cylinder that can be disposed on the outer periphery of the stator core. A windmill having blades provided on the outer periphery of the yoke, and a base on which a support arm protrudes, and an end portion of the stator core is fixed to the support arm. The shaft is pivotally supported on the support arm with the shaft passing through the shaft hole of the stator core. It is a small wind turbine generator magnet, characterized in that the resulting power rotated by 該風 wheel is rotated by the wind. The small wind power generator according to claim 1, further comprising a secondary battery for storing the electric power. The small wind power generator according to claim 1, further comprising output means for outputting the electric power. The small wind power generator according to claim 2, further comprising output means for outputting the electric power. The small wind power generator according to claim 1, further comprising a transformer for stepping up or stepping down the electric power. The small wind power generator according to claim 2 or 4, wherein the secondary battery is detachably provided. The small wind power generator according to claim 1, wherein the blade is detachably provided on the yoke.

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