JP2004339953A - Wind power generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wind power generating device enabling a reduction in size and simplification in structure. <P>SOLUTION: This wind power generating device comprises a windmill, an input shaft operably connected to the windmill, a gear train increasing the speed of a rotating power inputted through the input shaft therein, a housing for storing the gear train having a first side face opposed to the windmill and allowing the input shaft to pass therethrough and a second side face on the opposite side of the first side face, an output shaft operably connected to the gear train, a generator operably connected to the output shaft, a motor unit having a motor operably connected to the gear train, and a nacelle storing the housing, the generator, and the motor unit. The generator and the motor are disposed on one side and the other side of the first side face and the second side face of the housing. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wind power generator that converts rotational energy from a wind turbine into electric energy by a power generation motor.
[0002]
[Prior art]
2. Description of the Related Art It has been conventionally known to provide a starter motor in a wind turbine generator configured to increase the rotational energy obtained from a windmill and input the electric power to a generator to obtain electric energy (Patent Document 1).
[0003]
Patent Document 1 discloses a wind power generator in which the output of a speed increasing gear device is divided into a plurality of parts, and a power generator and a braking device are connected to different output shafts.
By providing such a configuration, the wind power generator is useful in terms of miniaturization of the entire apparatus, but there is still room for improvement.
[0004]
That is, in the wind power generator described in Patent Document 1, both the generator and the starting motor are arranged on the side opposite to the wind turbine of the speed increasing device, and therefore, the size of the nacelle accommodating the wind power generator is reduced. Cannot be achieved sufficiently.
[0005]
Furthermore, in the wind power generator described in Patent Document 1, since the speed increasing device, the generator, and the starting motor are individually installed in the nacelle, there is a problem that a vibration difference occurs between them.
[0006]
[Patent Document 1]
JP-A-57-193781
[Problems to be solved by the invention]
The present invention has been made in view of the conventional technology, and has a simple structure in which the respective components of the wind power generator can be efficiently arranged to reduce the size of a nacelle accommodating the wind power generator. The purpose of this is to provide one.
Another object of the present invention is to effectively suppress a vibration difference between components of a wind turbine generator.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention increases a wind turbine that converts wind energy into rotational power, an input shaft that is operatively connected to the wind turbine, and a rotational power that is input via the input shaft. A gear train that speeds up, a housing that houses the gear train, a housing that has a first side surface facing the windmill and through which the input shaft passes, and a second side surface opposite to the first side surface; An output shaft operatively connected to the gear train, a generator operatively connected to the output shaft, a motor unit having a motor operatively connected to the gear train, the housing, the generator, and the motor unit; The generator is disposed so as to face one of the first side surface and the second side surface of the housing, and the motor is connected to the first side surface of the housing and It is arranged to the other opposed two sides to provide a wind power generator has.
Preferably, the housing has an access opening allowing an external connection to the gear train from the outside, and the motor unit is detachably connected to the housing so as to close the access opening.
[0009]
Preferably, the motor is connected to and supported by the housing while being free from the nacelle.
Preferably, the generator can be connected to and supported by the housing in a state free from the nacelle, instead of or in addition to the motor.
[0010]
Preferably, the generator and the motor are arranged so that at least a part thereof overlaps in a front view.
More preferably, the generator and the motor are arranged coaxially.
[0011]
In one aspect, the input shaft protrudes into the housing from a first side of the housing and is operatively connected to the gear train, and the output shaft protrudes outward from the housing from a second side of the housing. Operatively connected to the generator. In such an embodiment, the motor is connected and supported on the first side surface of the housing above the input shaft.
[0012]
Preferably, the input shaft is a hollow shaft, and the wind power generator is further an operation shaft for adjusting a pitch angle of blades in the windmill, the operation shaft being inserted through the hollow input shaft. And a pitch angle adjusting device including an operating device for operating the operating shaft based on an external operation. The actuator may be connected and supported on a second side of the housing.
[0013]
Preferably, the apparatus further includes a hydraulic pump operatively connected to the gear train. The hydraulic pump may be connected and supported on a second side surface of the housing below the actuator.
[0014]
The motor may be driven when the wind turbine is started. Alternatively or additionally, the motor may be driven when there is no breeze or no wind when the generator does not generate power.
[0015]
Preferably, a connecting portion between the motor and the gear train is provided with a one-way clutch that allows transmission of power from the motor to the wind turbine and shuts off power transmission from the wind turbine to the motor.
In such an aspect, more preferably, the motor and the gear train are connected by a reduction mechanism that transmits power from the motor to the wind turbine in a reduced speed.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1
Hereinafter, a wind turbine generator 1A according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic external view of a wind turbine generator 1A according to the present embodiment. 2 and 3 are a schematic sectional view and a partial vertical sectional side view of the wind turbine generator 1A.
[0017]
As shown in FIGS. 1 to 3, the wind power generator 1 </ b> A includes a windmill 10 that converts wind energy into rotational power, an input shaft 20 operatively connected to the windmill 10, and the input shaft 20. A gear train 30 for increasing the rotational power input through the gear train, a housing 60 for housing the gear train 30, a first side face 60a facing the wind turbine 10 and through which the input shaft 20 passes; A housing 60 having a second side surface 60b opposite the one side surface 60a; an output shaft 70 operatively connected to the gear train 30; a generator 80 operatively connected to the output shaft 70; It comprises a motor unit having a motor 90 operatively connected thereto, and a nacelle 100 containing the housing 60, the generator 80 and the motor 90.
The wind power generator 1A according to the present embodiment includes a tower 200, and the nacelle 100 can be held at a predetermined height by the tower 200.
[0018]
The input shaft 20 is configured such that a front end extends outside the nacelle 100 and a rear end protrudes into the nacelle 100.
Specifically, the input shaft 20 has an outwardly extending portion (front end) connected to the central rotating body 11 of the windmill 10, and rotates around the axis with the rotation of the windmill 10. I have.
[0019]
In the present embodiment, from the viewpoint of ease of manufacturing and ease of assembly, the input shaft 20 is connected to the drive-side input shaft 21 connected to the windmill 10 and the front end is rotated around the axis of the drive-side input shaft 21. It has a split structure including a driven input shaft 22 that is connected to the gear train 30 so as to be relatively non-rotatable and has a rear end connected to the gear train 30.
[0020]
The gear train 30 can employ various aspects.
In the present embodiment, the gear train 30 is disposed between the planetary gear mechanism 35 and the output shaft 70 operatively connected to the input shaft 20 (the driven input shaft 22). Gear train 40.
[0021]
Specifically, the planetary gear mechanism 35 rotatably supports the sun gear 35a, the planetary gear 35b meshed with the sun gear 35a, and the planetary gear 35b, and rotates the sun gear 35a with the revolution of the planetary gear 35b. It has a planet carrier 35c that rotates around, and an internal gear 35d that meshes with the planet gear 35b.
Such a planetary gear mechanism 35 includes a planetary carrier in which the planetary carrier 35c is connected to the driven-side input shaft 22 so as not to rotate relatively, the internal gear 35d is fixed, and the planetary carrier 35c is connected to the sun gear 35a so as not to rotate relatively. The speed increase rotation is output from the output shaft 36.
[0022]
The gear train 40 is configured to transmit the rotation of the planetary output shaft 36 to the output shaft 70 at an increased speed.
In the present embodiment, the gear train 40 has a drive-side gear 40a provided so as to be relatively non-rotatable on the planetary output shaft 36, and a relatively non-rotatable with the output shaft 70 so as to mesh with the drive-side gear 40a. And a driven gear 40b having a smaller diameter than the driving gear 40a.
[0023]
The housing 60 can also have various forms.
In the present embodiment, the housing 60 has an opening 61a through which the gear train 40 can be inserted, a housing body 61 that accommodates the gear train 40, and a lid that closes the opening 61a of the housing body 61. A planetary housing 63 having a member 62 and an opening 63a through which the planetary gear mechanism 35 can be inserted, and connected to the housing main body 61 such that the opening 63a is closed when the planetary gear mechanism 35 is housed; have.
[0024]
As shown in FIGS. 2 and 3, in the present embodiment, the housing 60 has an access opening 60c that allows an external connection to the gear train.
By providing the access opening 60c, the motor unit can be retrofitted, and the specification of the presence or absence of the motor unit can be changed while the housing 60 is shared.
That is, the access opening 60c depends on factors such as whether the installation location of the wind power generation device is a zone where the wind capable of generating power is blowing stably or unstable, or a remote place or a town. Accordingly, the specification change of whether or not to include the motor unit can be performed using the common housing 60.
[0025]
The generator 80 is configured to receive the increased rotational power via the output shaft 70.
In the present embodiment, the generator 80 is fixed in the nacelle 100 while being separated from the housing 60.
In such a configuration, in order to absorb a vibration difference between the housing 60 and the generator 80, the output shaft 70 and the input shaft 81 of the generator 80 are provided with flexible joints 111 at both ends. Connected by a transmission shaft 110.
[0026]
In the present embodiment, in addition to the motor 90, the motor unit includes a motor support housing 64 connected to the housing 60, and a motor that interlocks and links a motor output shaft 91 of the motor 90 and the gear train 30. A transmission mechanism.
In the present embodiment, the motor transmission mechanism includes a motor-side gear 46 provided on the motor output shaft 91 so as to be relatively non-rotatable, and the motor-side gear 46 is relatively non-rotatable on the output shaft 70 so as to mesh with the motor-side gear 46. And a windmill-side gear 47 provided.
By such a motor transmission mechanism, the motor 90 is operatively connected to the windmill 10, and by driving the motor 90, rotational power is transmitted from the motor 90 to the windmill 10.
FIG. 4 shows a rear view of the housing 60.
As shown in FIGS. 2 to 4, the housing 60 has the access opening 60 c on the upper surface of the housing main body 61.
The motor support housing 64 supports the motor 90 and is connected to the upper surface of the housing main body 61 so as to close the access opening 60c while accommodating a part of the motor transmission mechanism.
According to such a configuration, it is possible to share the housing 60 in the mode including the motor unit and the mode including no motor unit.
In a mode without a motor unit, the access opening 60c is closed by a closing member such as a closing plate.
[0027]
The motor 90 is driven when the wind turbine 10 is started, and / or is driven when there is no breeze or no wind when the generator 80 does not generate power.
According to the latter, in addition to the case where the windmill 10 rotates naturally due to the wind, the windmill 10 can be forcibly rotated even when there is little wind or no wind, and a monument effect can be obtained.
[0028]
In the present embodiment, the motor side gear 46 and the windmill side gear 47 have the same pitch diameter for the following reason.
That is, when the motor 90 is driven to forcibly rotate the windmill 10 to obtain a monument effect, the windmill 10 does not need to be rotated at a high speed, so that the motor-side gear 46 has a small diameter (that is, the motor 90 has a small diameter). To the wind turbine 10).
[0029]
However, if the motor-side gear 46 has a small diameter, the motor output shaft 91 rotates at a high speed when the generator 80 is operated by the rotation of the wind turbine 10.
From this point of view, in the present embodiment, the motor side gear 46 and the windmill side gear 47 have the same pitch diameter.
According to such a configuration, by matching the motor 90 with the allowable rotation speed of the generator 80, the motor 90 exceeds the allowable value during the power generation operation of the generator 80 by the rotational power from the wind turbine 10. Rotation at the number of rotations can be prevented.
[0030]
Further, in the present embodiment, the generator 80 and the motor 90 are separately arranged before and after the housing 60, thereby achieving a reduction in the size of the wind power generator 1A as a whole.
That is, in the present embodiment, the generator 80 is arranged so as to face the second side face 60b of the housing 60, and the motor 90 is arranged so as to face the first side face 60a of the housing 60. Let me.
According to such a configuration, the motor 90 can be arranged using the space above the input shaft 20 which is usually a dead space, and a motor installation space is secured on the second side surface 60b side of the housing 60. No need.
Therefore, the space occupied by the connected body of the housing 60, the motor 90, and the generator 80 can be reduced.
[0031]
Furthermore, according to such a configuration, the motor 90 and the generator 80 can be arranged close to each other when viewed from the front, and thus the size of the entire apparatus can be reduced.
That is, when the generator 80 and the motor 90 are arranged on the same side of the housing 60, the output shaft 70 and the motor output shaft 91 need to be spaced apart so that they do not interfere with each other. Accordingly, the space occupied by the connected body of the housing 60, the generator 80, and the motor 90 is increased as well as the size of the housing 0 itself.
[0032]
On the other hand, if the generator 80 and the motor 90 are arranged before and after the housing 60 as in the present embodiment, it is not necessary to consider the interference between the motor 90 and the generator 80, and , The two can be placed close together (eg, so that the motor 90 and the generator 80 overlap). Therefore, the motor output shaft 91 and the output shaft 70 can be arranged close to each other, whereby the size of the housing 60 is reduced, and the space occupied by the housing 60, the motor 90 and the generator 80 is also reduced. can do.
[0033]
In the present embodiment, the motor 90 is arranged to face the first side surface 60a of the housing 60, and the generator 80 is arranged to face the second side surface 60b. It is also possible to arrange the machine 80 on the first side 60a and the motor 90 on the second side 60b.
[0034]
More preferably, the motor 90 can be connected to and supported by the housing 60 while being free from the nacelle 100.
According to such a configuration, a vibration difference between the motor 90 and the housing 60 can be eliminated, and durability can be improved and noise can be prevented.
[0035]
Wind power generator 1A according to the present embodiment can preferably include, in addition to the above configuration, pitch angle adjusting device 120 that adjusts the pitch angle of each blade 12 in wind turbine 10.
The pitch angle adjusting device 120 includes an operating shaft 121 for adjusting a pitch angle of each blade 12 in the wind turbine 10, an operating device 122 for sliding the operating shaft 121 in an axial direction based on an external operation, It has a link (not shown) for interlocking and linking the shaft 121 and each of the blades 12.
By providing such a pitch angle adjusting device 120, when the wind speed changes within a predetermined range, the rated speed of the generator 80 is maintained, or when the wind speed exceeds the predetermined range, the generator 80 is rotated excessively. Power transmission can be effectively prevented.
[0036]
Preferably, the operating device 122 can be connected to and supported by the housing 60 in a free state with respect to the nacelle.
More preferably, the input shaft 20 can be a hollow shaft, and the operation shaft 121 can be inserted into the hollow input shaft 20.
According to such a preferred embodiment, the actuator 112 can be connected to the housing 60 without being eccentrically arranged with respect to the input shaft 20.
[0037]
Further, the wind power generator 1A may include a brake mechanism 130 that applies / cancels a braking force to the power transmitted from the wind turbine 10 to the generator 80.
The provision of such a brake mechanism 130 can prevent the stopped windmill 10 from rotating unexpectedly.
[0038]
In the present embodiment, the brake mechanism 130 is configured to apply a braking force to the driven input shaft 22.
Specifically, the brake mechanism 130 includes a brake disk 131 supported on the driven input shaft 22 so as to be relatively non-rotatable, and a brake shoe 132 supported on the housing 60 so as to be relatively non-rotatable and slidable in the axial direction. Have.
[0039]
More preferably, the wind turbine generator 1A can include a turning mechanism (not shown) for turning the windmill 10 in a direction perpendicular to the wind direction between the nacelle 100 and the tower 200.
The turning mechanism is provided together with the pitch angle adjusting device 120 so that the output rotation speed from the windmill 10 is set in a range suitable for the generator 80 in accordance with the wind direction.
[0040]
Further, the wind turbine generator 1A may include a hydraulic pump 140 operatively connected to the gear train 30.
The hydraulic pump 140 is preferably connected to and supported by the second side surface 60b of the housing 60 while being free from the nacelle 100.
[0041]
In the present embodiment, power is transmitted between the motor 90 and the gear train 30 in both directions (that is, in the direction from the motor 90 to the windmill 10 and in the direction from the windmill 10 to the motor 90). Instead of this, as shown in FIG. 5, as shown in FIG. 5, a power transmission from the motor 90 to the wind turbine 10 is allowed at a connecting portion between the motor 90 and the gear train 30, and the wind turbine is A one-way clutch 50 for interrupting power transmission from the motor 10 to the motor 90 can be provided.
By providing such a one-way clutch 50, it is possible to prevent the motor 90 from being forcibly rotated when the generator 80 performs a power generation operation by the rotation of the wind turbine 10.
[0042]
Embodiment 2
Hereinafter, a wind turbine generator according to another preferred embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 6 shows a schematic vertical sectional view of a wind turbine generator 1B according to the present embodiment.
In the drawings, the same or corresponding members as in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0043]
The wind turbine generator 1B according to the present embodiment differs from the first embodiment mainly in that the generator 80 is connected to and supported by the housing 60 in a free state with respect to the nacelle 100. I have.
In the present embodiment, the vibration difference between the housing 60 and the generator 80 can be eliminated, whereby the power transmission between the output shaft 70 and the input shaft 81 of the generator 80 can be achieved. Can be performed simply and reliably.
In the present embodiment, the housing 60 has a bracket 65 connected to the second side surface 60b, and the generator 80 is mounted on the bracket 65.
[0044]
Furthermore, the wind power generator 1B according to the present embodiment arranges the motor 90 and the generator 80 coaxially while distributing the motor 90 and the generator 80 in the front-rear direction of the housing, thereby forming the motor 90 and the generator 80. Further, the connecting body of the housing 60 is further downsized.
[0045]
Specifically, one end (the rear end in the illustrated embodiment) of the output shaft 70 projects toward the second side surface 60b of the housing 60, and the other end of the output shaft 70 (in the illustrated embodiment). The front end of the output shaft 70 is also protruded toward the first side surface 60a of the housing 60, and one end and the other end of the output shaft 70 are connected to the generator 80 and the motor 90, respectively.
[0046]
In the present embodiment, the gear train 40 includes a counter gear 41 disposed between the driving gear 40a and the driven gear 40b, and a counter shaft 42 supporting the counter gear 41. Is further provided.
In the present embodiment, since the motor 90 is arranged coaxially with the generator 80, the motor support housing 64 and the motor transmission mechanism are eliminated.
That is, in the embodiment shown in FIG. 6, the motor unit has only the motor 90. The access opening 60c is formed in the first side surface 60a of the housing main body 61, and the motor 90 is detachably connected to the housing main body 61 so as to cover the access opening 60c.
[0047]
Further, in the present embodiment, the generator transmission path between the windmill 10 and the generator 80 and the motor transmission path between the motor 90 and the windmill 10 are shared ( As shown in FIG. 6) and FIG. 7, the generator transmission path and the motor transmission path may be different paths.
[0048]
That is, in the embodiment shown in FIG. 7, the gear train 40 constituting the generator-system transmission path includes a first drive-side gear 40 a provided on the planetary output shaft 36 so as not to rotate relative to the first drive-side gear 40 a. A counter gear 41 meshing with the side gear 40a, a counter shaft 42 for supporting the counter gear 41 so as to be relatively non-rotatable, a second drive side gear 43 provided on the counter shaft 42 so as to be relatively non-rotatable, A driven gear 40b is provided on the output shaft 70 so as to be relatively non-rotatable so as to mesh with the driving gear 43.
[0049]
The motor 90 is connected to the first side surface 60 a of the housing 60 so that the motor output shaft 91 is coaxial with the output shaft 70 and relatively rotatable. A motor transmission mechanism for interlocking and linking the motor 90 and the gear train 30 is provided so that the motor-side gear 46 provided on the motor output shaft 91 so as to be relatively non-rotatable is engaged with the motor-side gear 46. A windmill-side gear 47 is supported by the counter shaft 42 via a one-way clutch 50.
That is, in the embodiment shown in FIG. 7, the motor transmission mechanism includes the motor-side gear 46, the windmill-side gear 47, and the one-way clutch 50.
In the embodiment shown in FIG. 7, similarly to the embodiment shown in FIG. 6, a motor 90 is detachably connected to the housing main body 61 so as to close the access opening 60c.
[0050]
In the embodiment shown in FIG. 7, the countershaft 42 and the output shaft 70 and the motor output shaft 91 have the same center-to-center distance, and the countershaft 42 and the output shaft 70 in the generator-side transmission path. And the gear ratio between the counter shaft 42 and the motor output shaft 91 in the motor-side transmission path can be individually set.
[0051]
【The invention's effect】
As described above, according to the wind turbine generator according to the present invention, the generator is disposed to face one of the first side surface and the second side surface of the housing, and the motor is the other of the first side surface and the second side surface of the housing. The space occupied by the generator, the motor, and the housing can be reduced, and the size of the nacelle accommodating them can be reduced.
[0052]
Further, if the generator and / or the motor is connected to and supported by the housing while being free from the nacelle, a vibration difference between the housing and the generator and / or the motor can be eliminated. Therefore, it is possible to improve durability and prevent noise.
[0053]
If the generator and the motor are arranged so that at least a part thereof overlaps in a front view, the generator, the motor and the housing can be made more compact.
[0054]
Further, if the housing is provided with an access opening that allows an operative connection to the gear train from the outside and the motor unit is detachably connected to the housing so as to close the access opening, the motor unit is not provided. The housing can be shared with the embodiment.
[Brief description of the drawings]
FIG. 1 is a schematic external view of a wind turbine generator according to an embodiment of the present invention.
FIG. 2 is a schematic sectional view of the wind turbine generator shown in FIG.
FIG. 3 is a partial vertical sectional side view of the wind turbine generator shown in FIG.
FIG. 4 is a rear view of a housing in the wind turbine generator shown in FIGS. 2 and 3.
FIG. 5 is a partial vertical sectional side view of a modification of the wind turbine generator shown in FIGS. 2 to 4;
FIG. 6 is a schematic vertical sectional view of a wind turbine generator according to still another embodiment of the present invention.
FIG. 7 is a schematic vertical sectional view of a modification of the wind turbine generator shown in FIG. 6;
[Explanation of symbols]
1A, 1B Wind power generator 10 Wind turbine 20 Input shaft 30 Gear train 50 One-way clutch 60 Housing 60a First side surface 60b Second side surface 60c Housing access opening 70 Output shaft 80 Generator 90 Motor 100 Nacelle 120 Pitch angle adjustment Device 121 Operating shaft 122 Actuator 140 Hydraulic pump

Claims (13)

A windmill that converts wind energy into rotational power,
An input shaft operatively connected to the wind turbine;
A gear train for increasing the rotational power input via the input shaft,
A housing for housing the gear train, the housing having a first side facing the windmill and through which the input shaft passes, and a second side opposite to the first side;
An output shaft operatively connected to the gear train;
A generator operatively connected to the output shaft;
A motor unit having a motor operatively connected to the gear train;
A nacelle that houses the housing, the generator, and the motor unit;
The generator is disposed so as to face one of the first side surface and the second side surface of the housing,
The wind power generator, wherein the motor is arranged to face the other of the first side surface and the second side surface of the housing. The housing has an access opening allowing an operative connection to the gear train from outside;
The wind power generator according to claim 1, wherein the motor unit is detachably connected to the housing so as to close the access opening. 3. The wind turbine generator according to claim 1, wherein the motor is connected to and supported by the housing in a free state with respect to the nacelle. 4. The wind power generator according to any one of claims 1 to 3, wherein the generator is connected to and supported by the housing while being free from the nacelle. The wind power generator according to any one of claims 1 to 4, wherein the generator and the motor are arranged so as to at least partially overlap in a front view. The wind power generator according to claim 5, wherein the generator and the motor are arranged coaxially. The input shaft protrudes into the housing from a first side surface of the housing and is operatively connected to the gear train.
The output shaft projects from the second side surface of the housing to the outside of the housing and is operatively connected to the generator.
The wind power generator according to any one of claims 1 to 6, wherein the motor is connected and supported on a first side surface of the housing above the input shaft. The input shaft is a hollow shaft,
The wind power generator is further an operation shaft for adjusting a pitch angle of a blade in the wind turbine, an operation shaft inserted through the hollow input shaft, and an operation device for operating the operation shaft based on an external operation. And a pitch angle adjusting device including
The wind power generator according to any one of claims 1 to 7, wherein the operating device is connected and supported on a second side surface of the housing. A hydraulic pump operatively connected to the gear train;
The wind power generator according to claim 8, wherein the hydraulic pump is connected and supported on a second side surface of the housing below the operating device. The wind power generator according to any one of claims 1 to 9, wherein the motor is driven when the wind turbine is started. The wind power generator according to any one of claims 1 to 9, wherein the motor is configured to be driven when there is no breeze or no wind in which the generator does not generate power. A connection portion between the motor and the gear train is provided with a one-way clutch that allows power transmission from the motor to the wind turbine and shuts off power transmission from the wind turbine to the motor. The wind power generator according to any one of claims 1 to 11. 13. The wind power generator according to claim 12, wherein the motor and the gear train are connected by a reduction mechanism that reduces and transmits power from the motor to the wind turbine.

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