JP2001153028A - Small-scale wind power generating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide small-scale wind power generating equipment suppressing the transmission loss, highly efficiently generating power, being a small scale and a light weight, and generating power even by a weak wind. SOLUTION: This wind power generating equipment is provided with a power generating means converting the wind power into an electric power and a rectifying means for rectifying the power in a single unit. The power generating means is provided with a stator iron core having a columnar iron core, a shaft hole bored in the center of the iron core, a plurality of slots provided in the outer circumferential direction of the iron core, and a coil wound around the slot; a wind turbine having a bowl-shaped yoke, a shaft erected from the inside bottom center of the yoke, a magnet alternately formed with a S pole and a N pole and inserted in the inner wall of the yoke, and vanes provided in the outer circumference of the yoke; and a base having a support arm projecting thereto. The stator iron core is fixed to the support arm, the shaft of the wind turbine is rotationally pivoted to the support arm with its penetrating through the shaft hole of the stator iron core so that the wind turbine rotates by receiving the wind, and the magnet is rotationally moved, thereby generating the power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is portable,
The present invention relates to a small wind turbine generator that generates electricity by rotating a windmill by wind power.

[0002]

2. Description of the Related Art Utility model registration No. 3054811 is an example of such a 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 column for fixing and supporting these on the ground. The output shaft of the gearbox is attached to the rotor of the generator. Further, the coil of the generator is fixed to the main body of the gear box.

[0003] The windmill rotates by receiving wind from the blades, and this rotation is transmitted to the gearbox via a power shaft. In the gearbox, the rotation of the power shaft is further increased to rotate the rotor of the generator. When the rotor rotates, electric power is induced in the coil of the generator to generate electric power.

[0004]

However, the wind turbine generator has a large-sized rotor for high output, and further has a gearbox and a generator connected to a power shaft. Is large and heavy, and can be supported unless it is a strong support of a fixed type above the ground, and it is difficult to carry and move by human power.

Further, since a speed-increasing gear that requires a predetermined torque or more to start rotation is connected to the power shaft, the windmill does not rotate unless the wind power exceeds a certain level. It is not possible to make effective use of weak winds.

The present invention has been made in view of such circumstances, and it is possible to suppress transmission loss and to generate power with high efficiency.
It is an object of the present invention to provide a small-sized and lightweight wind turbine generator capable of generating electricity by effectively utilizing natural energy without wasting weak wind energy.

[0007]

According to a first aspect of the present invention, there is provided a small-sized wind power generator, wherein a power generating means for converting wind power to electric power and a rectifying means for rectifying the electric power are provided in a single unit. A stator having a cylindrical iron core, a shaft hole drilled through the center of the iron core, a plurality of slots opening in a U-shape in the outer circumferential direction of the iron core, and a coil wound around the slots. An iron core, a bowl-shaped yoke, a shaft rising from the center of the inner bottom of the yoke, and a cylinder which can be arranged on the outer periphery of the stator iron core. And a wind turbine having blades provided on the outer periphery of the yoke, and a base on which the support arm is protruded. The end of the stator core is fixed to the support arm, and the shaft of the wind turbine is provided. Is rotatably supported by the support arm while penetrating the shaft hole of the stator core, Magnet by car rotates by receiving wind, characterized in that the resulting power rotated.

According to a second aspect of the present invention, there is provided a small-sized wind power generator, wherein the wind power generation unit includes a secondary battery for storing electric power.

According to a third aspect of the present invention, there is provided a small-sized wind power generator, wherein the wind power generation unit includes output means for outputting power.

[0010] According to a fourth aspect of the present invention, there is provided a small-sized wind power generator, wherein the wind power generation unit is provided with output means for outputting power.

According to a fifth aspect of the present invention, there is provided a small-sized wind power generator, wherein the wind power generation unit includes a transformer for increasing or decreasing the electric power.

A small wind power generator according to claim 6 is characterized in that the secondary battery is detachably provided on the wind power generation unit.

According to a seventh aspect of the present invention, the small wind power generator is characterized in that the blade is detachably provided on the yoke.

[0014]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a front view of a small wind power generator according to the present invention. FIG. 2 is the electric wiring diagram,
FIG. 3 is a schematic sectional view taken along line III-III in FIG. FIG. 4 is an explanatory view showing a method of assembling the wind turbine shown in FIG. 1, and FIG. 5 is a sectional view of the wind turbine. FIG. 6 is a perspective view of the stator core, and FIG. 7 is a top view of the stator core. FIG. 8 is a partially enlarged sectional view taken along the line VIII of FIG. 3, and FIG. 9 is an electric circuit diagram of the same.

In FIG. 1 to FIG.
Is a power generation device that is portable and generates electric power by converting wind power into electric power. The wind power generation unit 5 has rectangular parallelepiped housings 10 and 11 having a length of about 120 mm and a width of about 25 mm.
It is a unit for performing wind power generation formed by. The weight of the wind power generation unit 5 is about 300 g. The wind power generation unit 5 includes a tubular body 10a that opens from the front to the back and penetrates. This cylindrical body 10a is formed as a wind passage. The wind power generation unit 5 is a single unit, and includes a secondary battery 17, a board 18, and an output connector 16, which will be described later, and a power generation unit such as a wind turbine 20 and a stator core 21, which will be described later.・
It has an output function integrally. In other words, only the wind power generation unit 5 can generate, charge, and output power, and does not require other devices.

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 of 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 projecting from the cylindrical body 10a in the center direction. An electric wire 22a extending from a coil 22, which will be described later, is connected to the support arm 11a and the support arm cover 1.
0b, and is led to the space inside the housings 10 and 11.

The windmill 20 has a bowl-shaped yoke 23, a shaft 24 rising from the center of the inner bottom of the yoke 23, and a cylindrical S-pole and N-pole alternately formed in the circumferential direction and inserted into the inner wall of the yoke 23. With the magnet 25 fitted, outside the yoke 23,
A blade member 27 having four blades 29 having a total area of about 60 cm ² is fitted around the outer periphery of a bowl-shaped support bowl 28.

The stator core 21 is formed by stacking several disk-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 opening in a U-shape in the outer peripheral direction. The slot 2 of the iron plate 21a forming the stator core 21
An electric wire 22a is wound around 1b to form a coil 22.

Inside the wind power generation unit 5, a substrate 18 is provided.
And a secondary battery 17. Diodes D1 to D6, which are rectifiers for rectifying the generated electricity, and a capacitor C1 are mounted on the board 18. Rechargeable battery 17 (in the circuit diagram of FIG. 9, the symbol is denoted as BT)
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 cover 11 c of the housing 11. The output connector 16 provided on the left side surface of the wind power generation unit 5 is a round pin-shaped connector that is an output unit for outputting power to other wind power generation units 5. The secondary battery 17 is not limited to a chargeable / dischargeable battery like a nickel-cadmium battery, but may be any element having a charge / discharge function, such as a supercapacitor.

A method for assembling the small wind turbine generator 1 according to this embodiment will be described. First, a method of assembling the windmill 20 will be described. First, as shown by an arrow a in FIG. 4, a cylindrical magnet 25 in which S poles and N poles are alternately formed in the circumferential direction is formed into a bowl-like inner wall of a yoke 23 in which a shaft 24 stands up from the center of the inner bottom. Insert into. Then, the yoke 23 is shaped as indicated by the arrow b in FIG. And, as shown in FIG.
The blade member 27 is fitted to the outside of the yoke 23. Thereby, the windmill 20 is completed. In the present embodiment, the magnet 2 has a cylindrical shape in which S poles and N poles are alternately formed in the circumferential direction.
5, but is not limited to this. For example,
A plurality of magnets 25 may be attached to the inner wall of the yoke 23 and arranged so that S poles and N poles alternately appear in the circumferential direction of the inner wall.

Next, a method of assembling the stator core 21 will be described. First, an iron plate is punched out by a press to produce a disk-shaped iron plate 21a 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, an electric wire 22a is wound around the slot 21b to form the coil 22. The circuit of the coil 22 has a three-phase configuration as shown in FIG.

Next, the mounting of the stator core 21 and the windmill 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 with each other,
The stator core 21 is fixed to the support protrusion 11b. Further, the shaft hole 21c where the support protrusion 11b does not reach and the support protrusion 11b
The bearings 26a and 26b are inserted into the inner circumference of. Then, the windmill 20 is mounted on the shaft 24 with the bearings 26a, 2a.
6b so as to be in close contact therewith. By fitting the retaining ring 24a to the end of the shaft 24 protruding from the bearing 26b, the windmill 20 is rotatably supported by the support protrusion 11b. The magnet 25 is rotatably arranged 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-impregnated alloy or the like may be used.

When the wind passing through the cylinder 10b hits the blade 29 and the windmill 20 rotates, the magnet 25
, The electric power is induced in the coil 22 to generate electric 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 radios and electric lights to the output connector 16, those electric devices operate with the electric power generated by the small wind power generator 1. The wind power generation unit 5 of this embodiment includes both a secondary battery 17 and an output connector 16 as an output unit. Then, the power generated in a windy state is stored in the secondary battery 17, and when there is no wind, the stored power can be output to the outside via the output connector 16. Also, by providing the secondary battery 17 detachably,
Secondary battery 1 charged and taken out in wind power generation unit 5
7 can be used as a battery for another electric device, and it is possible to easily supply power to another electric device without using a power supply means such as a cable. 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 does not need to have the secondary battery 17 and has the output connector 16. Even if not, it is possible to supply power to other electric devices via the secondary battery 17.

The amount of power generated by the power generation means is a voltage of about 4 V and a current of about 30 mA. Further, the sizes and power generation amounts of the housings 10 and 11, the blades 29, and the stator core 21 shown in the present embodiment are merely examples, and the portable size as shown in the present embodiment is a matter of course. Needless to say, various changes can be made within a range that can be carried and moved by human power without departing from the gist of each invention according to the present invention.

According to the small wind turbine generator 1 of this embodiment, the windmill is provided by providing the cylindrical magnet 25 having the S-pole and the N-pole alternately formed in the circumferential direction inside the yoke 23 having the blades 29. The inside of 20 is a rotating magnet.
Further, since the stator core 21 is provided inside the wind turbine 20, the wind turbine 20 itself is a part of the power generation means. For this reason, the length of the shaft 24 serving as the rotation transmitting means can be reduced, and the power can be directly generated by the wind received by the blades without passing through an additional device such as a gearbox.
Transmission loss can be suppressed and high-efficiency power generation is possible. Wind can be effectively received by the blades 29 provided at a portion far from the rotation center of the windmill 20, 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 turbine generator can be obtained.

Further, since an additional device such as a speed increaser / reducer is not required, the rotational torque of the wind turbine 20 can be suppressed and power can be generated even in a weak wind, and natural energy can be generated without wasting the energy of the weak wind. Effective use is possible. Also,
By providing the power generation means and the rectification means in the wind power generation unit 5 which is a single unit, transportation and installation are easy.

Further, since the yoke 23 and the blade member 27 are separate members, the blade member 27 having the appropriate blade 29 is selected according to the required power level and the wind strength at the time of power generation. By attaching it, efficient power generation is possible.

Although not provided in the wind power generation unit 5 of the present embodiment, a transformer for raising or lowering the voltage, such as a DC-DC converter, may be provided in the wind power generation unit 5. It is possible. By providing the transformer, it is possible to obtain electric power of an arbitrary voltage, it is possible to use the secondary batteries 17 having different charging voltages, and it is possible to use various electric devices without being limited to the power supply voltage. It can be driven.

[0029]

According to the first aspect of the present invention, since the magnet having the cylindrical shape and the S pole and the N pole alternately formed in the circumferential direction is provided inside the yoke having the blade, the inside of the windmill rotates. Has become a magnet. Further, since the stator core is provided inside the wind turbine, the wind turbine itself is a part of the power generation means. For this reason, the length of the shaft, which is the rotation transmitting means, can be kept short, and power can be directly generated by the wind received by the blades without passing through an additional device such as a speed reducer or the like. Power generation is possible. Since the blades provided at a portion far from the rotation center of the windmill can receive the wind and effectively obtain torque, and because the magnet and the coil provided at the portion near the rotation center of the windmill generate power, It has become possible to obtain a small and lightweight wind power generator. In addition, since no additional device such as a gearbox is required, the wind turbine can be controlled even when the wind is weak and the power can be used without wasting the energy of the weak wind. It is. In addition, by providing the power generation means and rectification means in a single unit, transportation and
Easy to install.

According to the second aspect of the present invention, since the secondary battery is provided, the power generated when the wind is blowing is stored in the secondary battery, so that the power can be stored even when there is no wind. Can be supplied.

According to the fifth aspect of the present invention, since there is a transformer, it is possible to obtain power of an arbitrary voltage, and it is possible to drive various electric devices without being limited to the power supply voltage. It is. It is also possible to charge secondary batteries having different charging voltages.

According to the sixth aspect of the present invention, since the secondary battery is detachable, the secondary battery that has been charged and taken out can be used as a battery of another electric device. It is possible to easily supply power to other electric devices without using the power supply.

According to the seventh aspect of the present invention, since the blade is detachable from the yoke, an appropriate blade is selected and mounted according to the required power level and the wind intensity during power generation. This enables efficient power generation.

[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.

FIG. 3 is a schematic sectional view taken along line III-III of FIG. 1;

FIG. 4 is an explanatory view showing a method of assembling the wind turbine shown in 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.

FIG. 8 is an enlarged sectional view taken along the line VIII of FIG. 3;

FIG. 9 is an electric circuit diagram of the same.

[Explanation of symbols]

 1 ································································································ Body 10b ······ Support arm cover 11a ······· Support arm 11c ········ Battery cover 17 ······· Rechargeable battery 18 · ········· Substrate 20 ···················· Windmill 21 ································· Iron plate 21b ········· ······ Slot 21c ··········································································································································································································································· ·······magnet

Continued on the front page F term (reference) 3H078 AA02 BB06 BB11 BB18 CC02 CC22 5H607 AA00 BB02 BB14 BB17 CC01 CC05 CC07 DD01 DD02 DD03 DD08 DD19 FF26 GG08 5H621 GA01 GA04 HH01 JK08 JK13 JK14

Claims (7)

[Claims] In a portable small wind power generator, a power generating means for converting wind power into electric power and a rectifying means for rectifying the electric power are provided in a single unit, and the power generating means has a cylindrical shape. A stator core having an iron core, a shaft hole penetrating through the center of the iron core, a plurality of slots opening in a U-shape in the outer peripheral direction of the iron core, and a coil wound around the slot. , A bowl-shaped yoke, a shaft rising from the center of the inner bottom of the yoke, and a cylinder that can be arranged on the outer periphery of the stator core, and S poles and N poles are alternately formed in the circumferential direction on the inner wall of the yoke. A windmill having a magnet fitted and a blade provided on the outer periphery of the yoke, and a base on which a support arm is protruded, wherein an end of the stator core is fixed to the support arm And the wind turbine shaft is turned around the support arm while penetrating the shaft hole of the stator core. Freely pivotally supported, a small wind turbine generator magnet, characterized in that the resulting power rotated by 該風 wheel is rotated by the wind. 2. The small wind power generator according to claim 1, further comprising a secondary battery for storing the electric power. 3. The small wind power generator according to claim 1, further comprising an output unit for outputting the electric power. 4. The small wind power generator according to claim 2, further comprising an output means for outputting the electric power. 5. The small wind power generator according to claim 1, further comprising a transformer for increasing or decreasing the electric power. 6. The small wind power generator according to claim 2, wherein said secondary battery is detachably provided. 7. The small wind power generator according to claim 1, wherein the blade is detachably provided on the yoke.