JP2001346359A - Wind power generating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind power generating apparatus which enables the reduction of the number of components. SOLUTION: This wind power generating apparatus comprises a generator stator whose outer circumference part is practically circular, a generator rotor whose inner circumference part is practically circular and a plurality of blades to which wind power is applied to turn the generator rotor. A plurality of coils are provided on the outer circumference part of the generator stator and the concentric lines of the plurality of coils are directed toward the center of the outer circumference part of the generator stator. The inner circumference part of the generator rotor faces the outer circumference part of a fixing member and the generator rotor is attached rotatably to the generator stator with the rotary shaft of the generator rotor as the center of rotation. A plurality of magnetic field generating elements are provided on the inner circumference part of the generator rotor and directions of magnetic flux densities generated by the two adjacent magnetic field generating elements are practically perpendicular to the concentric lines of the plurality of coils and opposite to each other. The generator stator outputs an AC power which is induced in the plurality of coils by the rotation of the generator rotor around the outer circumference of the generator stator.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a wind turbine generator.

[0002]

2. Description of the Related Art Wind power generation is used as a means for utilizing clean energy.

FIG. 3 shows a configuration of a conventional wind power generator.

Referring to FIG. 3, the configuration of a conventional wind turbine generator is a columnar or columnar tower 123.
It is composed of a power generator main body fixed to the upper part. The tower 123 is fixed on the ground at the lower part.

[0005] The power generation device main body includes a control device provided above the tower 123. This control device has a function of controlling the horizontal direction of the power generation device main body. The control device is provided at an upper portion of the tower 123, and has a bearing portion 114 whose inner peripheral portion is substantially circular. The power generator unit includes a brake unit 115 for stopping the horizontal movement of the power generator main body and a gear stopper 121 for controlling the gear unit 113.

[0006] A generator 101 is arranged above the control device. From the generator 101 to the main shaft direction 12 of the generator
4 extend to the coupling 10
2 is connected to the speed increaser 103. Further, a brake 106 for stopping rotation of the main shaft 104 is provided between the coupling 102 and the speed increasing device 103.

[0007] Further, through the gearbox 103, the main shaft direction 12
A rotary joint 105 is provided at an end of the main shaft 104 extending to 4. The main shaft 104 is fixed to the rotor head 107 by the rotary joint 105. Here, the rotor head 107 rotates around the main shaft direction 124 as an axis.
The torque obtained with the rotation of the rotor head 107 is transmitted to the generator 101 via the main shaft 104 fixed to the rotor head 107. The generator 101 generates electric power using this torque.

Each of the three blades 112 is fixed on the outer peripheral portion of the rotor head 107 in a direction perpendicular to the main axis direction 124 via a blade spindle 110 and a blade guide 111. Here, the blade spindle 110 is fixed to the outer peripheral portion of the rotor head 107 by a link 109 which is one end of the blade spindle 110 so as to extend in a direction perpendicular to the main axis direction 124. The other end of the blade spindle 110 fixes the blade 112 so as to extend in a direction perpendicular to the main axis direction 124. Each blade 112 is connected to another blade 112
Are arranged so as to have an equal angular interval of approximately 120 degrees.

Further, three hydraulic cylinders 108 connected to the respective blades 112 are attached to the outer peripheral portion of the rotor head 107 in the main axis direction. The hydraulic cylinder 108 has a function of changing the pitch angle of the blade 112 in response to the wind force received by the blade 112. The hydraulic cylinder 108 is controlled by a hydraulic unit 122 provided in the power generator main body so as to operate normally.

[0010] Below the rotor head 107, a maintenance floor 120 is provided, through which a worker who performs maintenance of each member can enter.

The central part of the power generator main body is covered with a nacelle 116. The nacelle 117 is provided with a manhole 119 through which a person can enter and exit.

A part of the generator 101, which is in a direction opposite to the main axis direction 124, is covered with a rear capsule 118 fixed to a nacelle 116.

Further, the rotor capsule 107 and the hydraulic cylinder 108 are rotatably arranged about a main shaft direction 124 with respect to a nacelle 116.
17 is covered. The front capsule 117 is fixed to the blade spindle 110 and the blade guide 111 so as not to hinder the rotation of each blade 112.

Next, the operation of the conventional wind turbine generator will be described.

When the blade 112 receives wind power, the blade 112 rotates the rotor head 107 about the main axis direction 124. The torque obtained with the rotation of the rotor head 107 is transmitted to the generator 101 via the main shaft 104 fixed to the rotor head 107. The generator 101 generates electric power using this torque.

As described above, a conventionally used wind turbine generator is composed of many parts. For this reason, in order to improve the reliability of the wind power generator, it is necessary to improve the reliability of each component constituting the wind power generator.

In the conventional 300 kW class wind turbine generator, the mass of the rotor head 107 is about 4,000 k.
g, the mass of the main shaft 104 is about 1,000 kg, and the mass of the bearing (not shown) of the main shaft 104 is about 500 kg. As described above, in the conventionally used wind power generator, the mass of the components constituting the wind power generator is large.

It is desired to reduce the number of parts constituting the wind power generator.

Further, it is desired to reduce the weight of parts constituting the wind power generator.

[0020]

SUMMARY OF THE INVENTION An object of the present invention is to provide a wind power generator which can be reduced in weight.

Another object of the present invention is to provide a wind power generator capable of reducing the number of parts.

It is a further object of the present invention to provide a wind power generator capable of improving reliability.

[0023]

Means for solving the problem are described as follows. The technical matters corresponding to the claims in the expression are appended with numbers, symbols, etc. in parentheses (). The numbers, symbols, etc. clarify the correspondence / correspondence between the technical matters corresponding to the claims and at least one of the plural / forms of implementation.
It is not intended to show that the technical matters corresponding to the claims are limited to the technical matters of the embodiment.

According to the present invention, there is provided a generator stator having a substantially circular outer peripheral portion.
Here, a plurality of coils (28) are provided on an outer peripheral portion of the generator stator (6), and a plurality of coils (28) are provided.
Are oriented in the direction of the center of the outer periphery of the generator stator (6), and the generator rotor (7) having a substantially circular inner periphery, and the generator rotor (7) The inner peripheral part of 7) faces the outer peripheral part of the fixing member (6), and the generator rotor (7) is fixed to the generator so as to be rotatable about the rotation axis (4) of the generator rotor (7). A plurality of magnetic field generators (22) are provided on the inner periphery of the generator rotor (7), and the magnetic flux generated by two adjacent magnetic field generators (22) is attached to the generator rotor (7). The orientation of the densities (23, 24) is substantially perpendicular to the concentric lines of the plurality of coils (28) and opposite to each other, and is directly connected to the outer periphery of the generator rotor (7) to receive wind. And a plurality of blades (10) for rotating the generator rotor (7), wherein the generator stator (6) comprises a generator rotor. By 7) rotates at a peripheral portion of the generator stator (6), to provide a wind turbine generator that outputs AC power induced in the plurality of coils (28).

In the above-mentioned wind power generator, the magnetic field generator (22) may be a permanent magnet.

In the above-mentioned wind power generator, the converters (15, 16) which are connected to the generator stator (6) and convert the AC power as the first AC power into the second AC power having a desired frequency. ) Can also be provided.

In the above wind power generator, the conversion unit (1)
The converters (5, 16) are connected to the generator stator and convert the first AC power into DC power, and are connected to the converter (15) to convert DC power into second AC power. It is also possible to comprise an inverter (16).

In the above-mentioned wind power generator, it is possible to further include adjusting devices (9, 11) for adjusting the pitch angle of the blade (10).

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wind power generator according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing the configuration of a wind power generator according to the present invention.

Referring to FIG. 1, a wind power generator according to the present invention is provided with an axial control for horizontally rotating a fixed shaft 3 to be described later on a columnar or columnar tower 1 fixed at a lower portion on the ground. The device 2 is fixed.

The axial control device 2 has a fixed shaft 3 fixed at the upper part. The fixed shaft 3 extends in the axial direction 4 of the fixed shaft 3. The fixed shaft 3 fixes the fixed hub 5 at its axial end 4. The fixed hub 5 has a substantially columnar shape with the axial direction 4 as an axis.

A generator stator 6 is fixed to a curved portion perpendicular to the axial direction 4 on the outer peripheral portion of the fixed hub 5.
The generator stator 6 has a substantially cylindrical shape with the axis 4 as an axis. A generator rotor 7 is rotatably mounted on the outer periphery of the generator stator 6 using a rotor bearing 8 with respect to the generator stator 6 around the axial direction 4. Here, the generator of the wind turbine generator according to the present invention includes the generator stator 6 and the generator rotor 7. As described later, the generator stator 6 has a function of outputting an AC current or an AC voltage having a frequency depending on the rotation speed of the generator rotor 7.

The generator stator 6 includes a converter 15
Is connected to The converter 15 has a function of converting an AC current or an AC voltage output from the generator stator 6 into a DC current or a DC voltage. This converter 15 is connected to an inverter 16. The inverter 16 has a function of converting a DC current or a DC voltage converted by the converter 15 into an AC current or an AC voltage having an arbitrarily settable frequency.

A blade 10 is attached to the outer periphery of the generator rotor 7 via a blade bearing 9. The blade bearing 9 responds to the wind force applied to the blade 10 to control the rotation of the blade 10 per hour, to keep the performance of the blade 10 optimal, or to avoid overloading the generator. For this purpose, a function of automatically adjusting the blade pitch angle of the blade 10 is provided.

The blade 10 has a blade 1
A pitch drive device 11 for changing the pitch angle of 0 is attached. The pitch drive device 11 is connected to the generator stator 6 via a slip ring (not shown).

A nacelle 12 is provided so as to cover the entire axial control device 2 and the fixed shaft 3. The nacelle 12 is integrated with the fixed shaft 3 using a support structure such as a bracket (not shown). Further, a windmill control device 13 for controlling the operation of the wind power generation device is provided inside the nacelle 12. In addition, Nasser 12 and Tower 1
A vertical direction controller 14 for controlling the vertical component in the axial direction 4 via the nacelle 12 is provided at the connection portion with the vertical direction.

FIG. 2 shows the configuration of the generator of the wind turbine generator according to the present invention.

Referring to FIG. 2, the generator comprises a generator stator 6 and a generator rotor 7.

In the inner peripheral area of the generator rotor 7, a plurality of magnetic field generators 22 composed of permanent magnets are arranged at equal angular intervals. Magnetic flux density vector 2 generated by each magnetic field generator 22
Reference numerals 3 and 24 face the circumferential direction of the inner circumference of the generator rotor 7. The magnetic flux density vectors 23 and 24 of the two adjacent magnetic field generators 22 indicate directions opposite to each other. Therefore, the two adjacent magnetic field generators 22 generate a centripetal vector 25 directed in the axial direction 4 or a centrifugal vector 26 directed in the direction opposite to the axial direction 4.

A plurality of output elements 29 composed of a core 27 and a coil 28 are arranged at equal angular intervals in the outer peripheral area of the generator stator 6. In this embodiment, the output elements 29 are arranged so that the number of the output elements 29 and the number of the magnetic field generators 22 are equal. The coil 28 has a core 27 wound therearound. Coil 2
The direction in which the concentric line 8 is directed is substantially equal to the direction toward the axial direction 4. For this reason, the concentric line of the coil 28 is substantially orthogonal to the magnetic flux density vectors 23 and 24,
5 and the centrifugal vector 26. In addition, two adjacent output elements 29 obtain induced currents in which currents flowing through the coil 28 are opposite to each other.

Next, the operation of this generator will be described below.

When the generator rotor 7 rotates, the plurality of output elements 29 obtain an AC induced current having a cycle corresponding to the number of rotations per hour of the generator rotor 7. Generator stator 6 outputs this AC induced current to the connected converter.

Next, the operation of the wind power generator according to the present invention will be described.

The generator rotates the generator rotor 7 when wind is applied to the blade 10 to output electric power. The windmill control device 13 monitors the magnitude of the electric power output by the generator. When the generator outputs power equal to or higher than the rated output, the wind turbine controller 13 detects that the power output by the generator has exceeded the rated output. At this time, the wind turbine control device 13 controls the pitch drive device 11 to change the pitch angle of the blade 10 in order to control the number of rotations of the blade 10 per time so that the output of the generator becomes constant.

Since the blade and the generator are integrated in the wind power generator of the present invention, the main shaft, bearing, and the like of the generator conventionally used in the wind power generator of the present invention are used.
Parts such as the rotor head are not used.

Therefore, the wind power generator according to the present invention enables the number of parts to be reduced.

Further, the wind power generator according to the present invention can be reduced in weight.

The wind power generator according to the present invention can save space.

Further, the wind power generator according to the present invention makes it possible to simplify complicated wiring that has been conventionally performed.

Further, the wind power generator according to the present invention enables the structure to be simplified.

In addition, the wind power generator of the present invention
The number of parts can be reduced, the weight can be reduced, and the structure can be simplified.

For this reason, in the wind turbine generator according to the present invention, it is easy to check each component, and it is possible to reduce failures caused by the component.

The wind power generator according to the present invention can reduce the change in mechanical load or the maximum load applied to each component. As a result, the wind power generator according to the present invention can improve the strength of the entire apparatus.

Further, the wind power generator according to the present invention comprises:
When power is extracted from the generator, an AC-DC-AC link using a converter and an inverter is used. For this reason, the wind power generator according to the present invention can reduce the inrush current at the time of system integration.

Further, in the wind power generator according to the present invention, the pitch angle of the blade can be changed by using the blade bearing and the pitch driving device. For this reason, the wind power generator in the present invention can control the number of rotations of the blade per unit time. Therefore, the wind power generator according to the present invention can reduce output fluctuation even when a large wind speed change such as a gust occurs.

[0057]

The wind power generator according to the present invention has the effect of reducing the number of parts.

The wind power generator according to the present invention has the effect of enabling weight reduction.

The wind power generator according to the present invention has the effect of saving space.

The wind power generator according to the present invention has an effect that it is possible to simplify complicated wiring that has been conventionally performed.

The wind power generator according to the present invention has the effect that the structure can be simplified.

The wind power generator according to the present invention has the effect of simultaneously reducing the number of parts, reducing the weight and simplifying the structure.

The wind power generator according to the present invention has an effect that it is easy to check each component and it is possible to reduce failures caused by the component.

The wind power generator according to the present invention has an effect that a change in mechanical load applied to each component or a maximum load can be reduced.

The wind power generator according to the present invention has an effect that the strength of the entire apparatus can be improved.

The wind power generator according to the present invention has the effect of reducing the inrush current at the time of system integration.

The wind power generator according to the present invention has an effect that the number of rotations of the blade per unit time can be controlled.

The wind power generator according to the present invention has the effect that the fluctuation of the output can be reduced even when a large wind speed change such as a gust occurs.

[Brief description of the drawings]

FIG. 1 shows a configuration of a wind power generator according to the present invention.

FIG. 2 shows a configuration of a generator according to the present invention.

FIG. 3 shows a configuration of a conventionally used wind power generator. DESCRIPTION OF SYMBOLS 1 Tower 2 Axial direction control device 3 Fixed axis 4 Axial direction 5 Fixed hub 6 Generator stator 7 Generator rotor 8 Rotor bearing 9 Blade bearing 10 Blade 11 Pitch drive device 12 Nacelle 13 Windmill control device 14 Vertical control device 15 Converter 16 Inverter 22 Magnetic field generator 23, 24 Magnetic flux density vector 25 Centroid vector 26 Centrifugal vector 27 Core 28 Coil 29 Output element 101 Generator 102 Coupling 103 Gearbox 104 Main shaft 105 Rotary joint 106 Brake 107 Rotor head 108 Hydraulic pressure Cylinder 109 Link 110 Spindle 111 Blade guide 112 Blade 113 Gear part 114 Bearing part 115 Brake part 116 Nacelle 117 Front capsule 118 Rear capsule 119 Manhole 120 Maintenance floor 121 Gear stopper 122 Hydraulic unit 123 Tower 124 Main axis direction

Claims (5)

[Claims] 1. A generator stator having a substantially circular outer peripheral portion, wherein a plurality of coils are provided on an outer peripheral portion of the generator stator, and concentric lines of the plurality of coils are ,
A generator rotor oriented toward the center of the outer periphery of the generator stator, the inner periphery of which is substantially circular;
An inner peripheral portion of the generator rotor faces an outer peripheral portion of the fixed member, and the generator rotor is rotatably attached to the generator stator around a rotation axis of the generator rotor, A plurality of magnetic field generators are provided on an inner peripheral portion of the generator rotor, and a direction of a magnetic flux density generated by two adjacent magnetic field generators is substantially equal to a concentric line of the plurality of coils. Are perpendicular and opposite to each other, are directly connected to the outer periphery of the generator rotor, and are composed of a plurality of blades for rotating the generator rotor in response to wind force. A wind power generator, wherein the generator rotor rotates around an outer periphery of the generator stator to output AC power induced in the plurality of coils. 2. The wind power generator according to claim 1, wherein the magnetic field generator is a permanent magnet. 3. The wind power generator according to claim 1, wherein the wind power generator is connected to the generator stator and converts the AC power as first AC power into second AC power having a desired frequency. A wind power generator, further comprising: a converting unit. 4. The wind power generator according to claim 3, wherein the converter is connected to the generator stator, and is connected to a converter that converts the first AC power into DC power, and is connected to the converter. And an inverter for converting the DC power to the second AC power. 5. The wind power generator according to claim 1, further comprising an adjusting device that adjusts a pitch angle of the blade.