JP2012002074A - Wind turbine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To more stabilize unstable output of power generation in wind turbine generation.SOLUTION: A wind turbine generator includes: a first generator 5 having a rotor rotating together and coaxially with a rotating shaft 2 which receives wind force and rotates; a flywheel 7 coaxial with the rotating shaft 2 and arranged through a one-way clutch so as to be in a state rotating together with the rotating shaft 2 in a given rotation direction of the rotating shaft 2 when the rotating shaft 2 is accelerated and to be disconnected from the rotating shaft 2 and rotate under inertia when the rotating shaft 2 is decelerated; a second generator 9 having a rotor rotating together and coaxially with the flywheel 7; an electric motor 70 rotatively driving the flywheel in the given rotation direction; a drive electric power supply section supplying drive electric power to the electric motor 70; a control section performing the drive electric power supply to the electric motor 70 when the rotation speed of the flywheel 7 detected at a rotation speed level detection section is below a predetermined level; and an output section outputting the generated electric power of the generators 5, 9 to the outside.

Description

  The present invention relates to a wind turbine generator.

  In recent years, attention has been focused on wind power generation that does not emit greenhouse gases such as carbon dioxide as a power generation method using renewable energy in order to preserve the global environment (for example, Patent Document 1).

JP 2004-239113 A

  However, the problem with wind power generation is that it is not stable because the power generation output fluctuates as the wind speed fluctuates.

  The subject of this invention is providing the wind power generator which can stabilize the unstable electric power generation output in wind power generation more, and can output for a longer time.

Means for Solving the Problems and Effects of the Invention

In order to solve the above problems, the wind turbine generator of the present invention is
A windmill that receives wind force and rotates around a predetermined axis of rotation in a constant rotation direction;
A first power generation means having a rotor arranged so as to rotate integrally with the rotation axis of the windmill, and generating electric power by rotation of the rotor accompanying rotation of the rotation shaft;
When the rotation axis is coaxial with the rotation axis and the rotation axis is increasing in the constant rotation direction, the rotation axis is integrally rotated with the rotation axis, and the rotation axis is decelerated, and the rotation axis is decelerated. A flywheel disposed through a one-way clutch so as to be inertially separated from the rotating shaft,
A second power generation different from the first power generation means, which has a rotor arranged to rotate integrally with the flywheel so as to rotate integrally, and generates electric power by the rotation of the rotor accompanying the rotation of the flywheel. Means,
Electric drive means for rotationally driving the flywheel in the constant rotational direction;
Drive power supply means for supplying drive power to the electric drive means;
Rotation speed level detection means for detecting the rotation speed level of the flywheel;
Drive power control means for causing the drive power supply means to supply drive power to the electric drive means when the detected rotation speed level falls below a predetermined threshold rotation speed level;
Out of the power generated by the first power generation means and the second power generation means, at least input of power generated by the second power generation means, and output means for outputting the input power to the outside,
It is characterized by providing.

  According to the configuration of the present invention described above, the electric power generated by the first power generation unit varies greatly depending on the wind power received by the windmill, but the power generated by the second power generation unit is accumulated in the flywheel. The output is stable because it is generated on the basis of the stable rotational energy, and at least the power generated by the second power generation means is output (power generated by the first power generation means). Can be output in a superimposed manner), and a relatively stable power generation output can be obtained.

  Specifically, when the windmill is decelerated, the flywheel and the windmill are separated from each other, and the flywheel is in an inertial rotation state. In other words, since it is not affected by the deceleration of the windmill, it is possible to continue the rotation for a longer time. During this time, the second power generation means outputs a stable power generation output to the outside, although it gradually attenuates with time. The Even if the power generated by the first power generation means is superimposed, the instability of the power generated by the first power generation means is greatly reduced.

  On the other hand, when the speed of the windmill is increased, the rotating shaft of the windmill and the flywheel are in an integrated rotation state, and rotational energy is accumulated in the flywheel. By the energy, a stable power generation output can be continuously obtained from the second power generation means for as long as the accumulated amount. In addition, when the wind turbine speed is increased, the wind turbine rotation shaft and the flywheel are in a state of integral rotation, so that even if the flywheel is stopped or extremely slow, the flywheel is directly connected to the windmill. Torque acts. For this reason, even when the flywheel is stopped and at a low speed, a relatively large torque is transmitted to the flywheel, and the rotation can be continued efficiently.

  In addition, according to the present invention, when the rotational speed of the flywheel falls below a certain level, the electric drive means assists the rotation of the flywheel in the constant rotational direction, so that the power generated by the flywheel that is stably output is generated. The output can be continuously output for a longer time. When the flywheel is stopped and at a low speed (especially when it is stopped), a very large torque is required to start the rotation again. According to the above configuration, the flywheel is stopped by the drive power control means. Since the drive power supply means is controlled so as not to cause the torque, it is not necessary to generate torque for starting rotation again.

  Further, the second power generation means and the electric drive means are provided integrally with the flywheel, and the rotor and stator of the electric drive means are positioned on the outer peripheral side rather than the rotor and stator of the second power generation means. be able to. Since the electric drive means is located on the outer peripheral side, the assist force in the constant rotational direction of the flywheel acts on the outer side in the radial direction, so that the rotational force can be transmitted effectively.

  The flywheel may be disposed between the first power generation unit and the second power generation unit in the axial direction of the rotation shaft. In other words, the first power generation means and the second power generation means in the generator case body are positioned in the axial direction of the rotary shaft 2 with a flywheel interposed therebetween, and a single space in the power generation case body is a flywheel. Thus, it can be divided into an upstream side accommodation space for accommodating one power generation means and a downstream side accommodation space for accommodating the other power generation means. As a result, in the upstream housing space and the downstream housing space, the other space is not affected by the turbulence of the air flow accompanying the rotation of the rotating body in one space, and the rotating body in each space is not affected. Rotation is stable.

  In the present invention, the drive power supply means can be configured to supply drive power for the electric drive means based on power supplied from an external power supply system to the electric drive means. Thereby, since the electric drive means can be driven using the electric power supplied from the external power supply system, the electric power can be stably supplied to the electric drive means, and there is no fear of stopping the flywheel.

  In the present invention, the drive power supply means can be configured to supply the electric drive means with drive power for the electric drive means based on the power stored in the power storage means. Also in this case, since the electric drive means can be driven using the electric power previously stored in the electric storage means, the electric power can be stably supplied to the electric drive means, and there is no fear of stopping the flywheel.

  In the present invention, the electric power generated by the first power generation means can be stored in the power storage means. In this case, the output means can be configured to supply only the electric power generated by the second power generation means to the outside. According to this configuration, the power generated by the first power generation unit with unstable output is stored in the power storage unit, and only the power generated by the second power generation unit with stable output can be output to the outside. It becomes possible.

  In the present invention, both the electric power generated by the first power generation means and the second power generation means can be stored in the power storage means. In this case, the power supplied to the outside from the output means can be the power once stored in the power storage means. According to this configuration, since the power supply source to the outside serves as the power storage means, stable power output is possible.

  In the present invention, drive power for the electric drive means based on the electric power stored in the first power storage means is supplied to the electric drive means, and the first power generation means and the first power supply are supplied to the second power storage means. In a case where either of the two electric powers generated by the two power generation means is stored, the first power storage means and the second power storage means can be provided as a common power storage means. This eliminates the need for a plurality of power storage means. Further, in this case, a remaining amount detecting unit that detects the remaining amount of the common power storage unit, and when the detected remaining amount exceeds a predetermined threshold remaining amount, the power storage unit Output power control means for supplying the power stored in the outside to the outside. As a result, it is possible to constantly ensure a constant driving power for rotating the flywheel in the power storage means.

  In the present invention, in the case of the configuration in which the electric drive unit is driven by the electric power stored in the power storage unit, the remaining amount detection unit for detecting the remaining amount of the power storage unit and the remaining amount to be detected are predetermined. If the threshold remaining amount is not exceeded, power is supplied to the power storage means to execute power storage.If the threshold remaining amount is exceeded, the power is supplied to the power storage means if the threshold remaining amount is not exceeded. Power storage power control means for inputting the power to be output to the output means and outputting the power to the outside (the power that should have been supplied to the power storage means if the threshold remaining amount is not exceeded). Can do. As a result, surplus power that is not stored in the power storage means can be output to the outside, so that the output power to the outside can be increased.

  In the present invention, the output means may supply both the power inputs generated by the first power generation means and the second power generation means to the outside. By outputting the power generated by both the first power generation means and the second power generation means in a superimposed form, the instability of the power generated by the first power generation means is alleviated and the overall stability is relatively stable. Power generation output can be supplied to the outside. For example, it can be supplied to an external power supply system or power storage means.

BRIEF DESCRIPTION OF THE DRAWINGS The external view which shows simply the wind power generator which is one Embodiment of this invention. The block diagram which shows simply the electric constitution of the wind power generator of FIG. The block diagram which shows simply the electric structure of the output part and drive power supply part of the wind power generator of FIG. The expanded sectional view which shows simply the windmill part in the wind power generator of FIG. The expanded sectional view of the nacelle part in the wind power generator of FIG. The expanded sectional view which expanded the power generation case body inside the wind power generator of FIG. The perspective view of the stator of the generator in the wind power generator of FIG. The front view and partial sectional view of the stator of FIG. The perspective view which shows the positional relationship of the stator and magnetic member of the wind power generator of FIG. The front view and partial sectional view of the stator and magnetic member of FIG. The perspective view of the stator of the electric motor in the wind power generator of FIG. The front view and partial sectional view of the stator of FIG. The front view and partial sectional view which show the positional relationship of the electric motor stator and magnetic member in the wind power generator of FIG. The flowchart which shows the flow of the drive electric power supply control to an electric motor. The block diagram which shows simply the electrical structure of the output part different from FIG. 3, and the drive electric power supply part in the wind power generator of this invention. The block diagram which shows simply the electric structure of the output part different from FIG.3 and FIG.15 and a drive electric power supply part in the wind power generator of this invention. The flowchart which shows the flow of the electric power supply control to the exterior. The block diagram which shows simply the electric structure of the output part different from FIG.3, FIG.15 and FIG.16 and a drive electric power supply part in the wind power generator of this invention. The flowchart which shows the flow of the electric power input control to an electrical storage means. The block diagram which shows simply the electric structure of the output part and drive electric power supply part different from FIG.3, FIG.15, FIG.16 and FIG. 18 in the wind power generator of this invention. FIG.3, FIG.15, FIG.16, FIG.18 and FIG. 20 in the wind power generator of this invention show the block diagram which shows simply the electric structure of embodiment.

  Hereinafter, an embodiment of a wind turbine generator according to the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram schematically showing a configuration of a wind power generator according to an embodiment of the present invention. FIG. 2 is a block diagram schematically showing the configuration of the wind turbine generator of FIG. The wind turbine generator 1 of the present embodiment shown in FIGS. 1 and 2 receives a wind force from a predetermined wind receiving direction 2w and rotates around a predetermined rotation axis 2x in a constant rotation direction, and the wind turbine 3 A first generator (power generation means) 5 that has a rotor 51 arranged so as to rotate integrally with the rotary shaft 2 and that generates electric power by the rotation of the rotor 51 as the rotary shaft 2 rotates; If the rotation axis 2 is coaxial with the rotation axis 2 and the speed of the rotation axis 2 is increasing in the constant rotation direction, the rotation axis 2 is rotated integrally with the rotation axis 2 and the rotation axis 2 is decelerated. In this case, the flywheel 7 arranged via a one-way clutch (one-way clutch) 6 is separated from the rotary shaft 2 and rotates in an inertial manner, and the flywheel 7 is coaxial with the flywheel 7 so as to rotate integrally. Fly with a rotor 91 arranged Generating power by the rotation of the rotor 91 caused by the rotation of the Eel 7 configured to include a different second generator (generator means) 9 and the first generator 5.

  In addition, the wind turbine generator 1 of the present embodiment is an electric motor that rotates the flywheel 7 in the same direction as the rotation direction of the rotating shaft 2 (the constant rotation direction) when the windmill 3 receives wind (that is, the flywheel 7 An electric motor that assists the rotation in the above-described direction. Here, a motor (electric drive means) 70, a drive power supply unit (drive power supply means) 16 that supplies drive power to the motor 70, and rotation of the flywheel 7 Rotation speed level detection unit (rotation speed level detection means) 701 for detecting the speed level, and driving when the rotation speed level detected by the rotation speed level detection unit 701 falls below a predetermined threshold rotation speed level. And a control unit (drive power control means) 700 that causes the power supply means to supply drive power to the electric drive means.

  For example, as shown in FIGS. 3A and 3B, the drive power supply unit 16 inputs three-phase AC power input from the outside to the three-phase AC inverter 17, and Then, the excitation power (driving power) of the three-phase AC motor 70 is output to the stator coil 74 of the electric motor 70. In the embodiment shown in FIG. 3A and FIG. 3B, driving power for the electric motor 70 based on electric power supplied from the external power supply system 19A is supplied to the electric motor 70. That is, the electric power supplied from the external power supply system 19 </ b> A is converted into the driving electric power for the electric motor 70 and supplied to the electric motor 70. Further, as shown in FIG. 21, the drive power supply unit 16 may supply drive power for the motor 70 based on the power supplied from the external battery (power storage means) 19 </ b> B to the motor 70. Good. That is, for example, the DC power supplied from the external battery 19B is converted into driving power for excitation for rotating the motor (here, a three-phase AC motor) 70 via the inverter 18, for example. It may be converted into drive power and supplied to the electric motor 70.

  Furthermore, the wind power generator 1 of this embodiment receives the input of either or both of the electric power generated by the first generator 5 and the second generator 9, and outputs the input electric power to the outside. Unit (output means) 10. The output unit 10 here is configured so that at least the power generated by the second generator 9 is input and output to the outside for stabilization of the output power.

  For example, as shown in FIGS. 3A and 3B and FIG. 21, the output unit 10 receives both power inputs generated by the first generator 5 and the second generator 9. An output unit (output means) 10 for receiving and outputting them together can be configured. In other words, the output lines of the generated power of the first generator 5 and the second generator 9 can be connected to reach the external output, and can be configured to output externally in one system.

  The output unit 10 in FIG. 3A inputs the three-phase AC power generated by the first generator 5 and the second generator 9 to the rectifier 12 and then inputs the rectifier 12 to the boost controller 11. It can be configured to input and output at a predetermined voltage, and further input it at the power conditioner 15 to convert the input DC power into system power and output it externally. Thereby, both the electric power produced | generated by the 1st generator 5 and the 2nd generator 9 can be combined, and can be supplied to the external power supply system 19A, for example, power sale etc. are attained. Alternatively, the power conditioner 15 may convert the AC power to be used in the home and output it externally. Further, the output unit 10 of FIG. 3B and FIG. 21 inputs both of the first generator 5 and the second generator 9 generated by the rectifier 12 and then inputs them to the boost controller 13. Alternatively, direct current power set to a predetermined voltage may be supplied to the battery (power storage means) 19B for storage. Further, the electric power stored in the battery (electric storage means) 19B may be supplied to the external power supply system 19A via the power conditioner 15. The power supply system 19A and the battery (power storage means) 19B are both power supplies 19 outside the apparatus.

  The control unit 700 is configured as a well-known microcomputer including a CPU, a ROM, a RAM, and the like. Various control programs, control parameters, and the like are stored in a storage unit such as a ROM, and the CPU performs control using them. carry out. The control unit 700 of this embodiment is connected to a rotation speed level detection unit (rotation speed level detection means) 701, and the CPU executes a control program stored in a storage unit such as a ROM in FIG. The drive power supply control to the electric motor 70 as shown is executed. Specifically, the control unit 700 first acquires a value reflecting the rotation speed level of the flywheel 7 from the rotation speed level detection unit (rotation speed level detection means) 701 (S1), and the acquired value indicates. When the rotational speed level is lower than the threshold rotational speed level stored in the storage unit such as the ROM (S2: Yes), the power supply switching unit (switch) 16S of the drive power supply unit 16 is switched to the supply side. Then, the drive power is supplied to the electric motor 70 (S4). On the other hand, when it is not lower than the threshold rotation speed level (S2: No), the power supply switching unit (switch) 16S of the drive power supply unit 16 is switched to the cutoff side to supply the drive power to the motor 70. Shut off and stop (S3).

  Note that the rotational speed level detection unit 701 of the present embodiment uses the fact that the rotational speed of the flywheel is reflected in the generated power of the second generator 9 to generate the current of the generated power of the second generator 9. Although it is provided as a known ammeter for detecting a value, it may be one that directly detects the rotational speed of the flywheel. For example, as shown in FIG. 20, a known magnetic or optical rotation sensor (for example, a rotary encoder) 703 for detecting the rotation speed of the flywheel may be provided in place of the ammeter 701 forming the rotation speed level detection unit. Good.

  Hereinafter, the structure of the wind power generator of this embodiment is demonstrated with reference to drawings.

  In the wind turbine 3 of the present embodiment, the wind receiving direction 2w coincides with the extending direction of the axis 2x of the rotating shaft 2 (hereinafter referred to as the axial direction), and receives wind force from the wind receiving direction 2w in a certain direction. A plurality of blades 30 are provided for rotation. Each blade 30 is connected (connected) to the rotary shaft 2 via the hub 22.

  FIG. 4 is an enlarged cross-sectional view of the windmill portion of the wind turbine generator 1 of the present embodiment. However, the internal structure of the nacelle 21 is shown in a simplified manner. The windmill 3 is disposed inside a cylindrical wind tunnel (duct) 31 that extends in a cylindrical shape so as to be coaxial with the axial direction of the rotary shaft 2. The cylindrical wind tunnel portion 31 is formed in a form in which the opening area decreases from the upstream side to the downstream side in the wind receiving direction 2w of the wind turbine 3. More specifically, the cylindrical wind tunnel portion 31 has a curved shape that bulges inward in the radial direction in a section between the upstream annular end portion 31A and the downstream annular end portion 31B in the wind receiving direction 2w. Make. The wind taken in the cylindrical wind tunnel 31 is supplied downstream in a compressed form, and the blades on the downstream side receive this, so that the rotational force obtained by the wind turbine 3 can be increased.

  A plurality of support members (FRP) 32 extending radially outward from the outer peripheral surface 210 of the nacelle 21 are fixed to the inner peripheral surface of the cylindrical wind tunnel portion 31 (see FIG. 3). The rotation shaft 2 is provided non-rotatingly.

  The nacelle 21 accommodates the first generator 5, the flywheel 7, the second generator 9, and the rotating shaft 2 therein. As shown in FIGS. 4 and 5, the outer surface 21 </ b> A of the nacelle 21 is formed as a curved surface having a vertex 21 a on the upstream side in the wind receiving direction 2 w on at least the axis 2 x of the rotation shaft 2. More specifically, the outer surface 21A forms a rotationally symmetric surface whose surface shape does not change even when the outer surface 21A is rotated around the axis direction of the rotating shaft 2, and is streamlined here. On the other hand, on the downstream side of the wind receiving direction 2w of the nacelle 21 is provided a hub 22 fixed to the rotary shaft 2 so as to rotate integrally with the wind turbine 3, and the outer surface 22A of the nacelle 21 is connected to the outer surface 21A of the nacelle 21. A curved surface smoothly extending from the curved surface formed in the wind receiving direction 2w is formed, and a curved surface having a vertex portion 22a on the upstream side of the wind receiving direction 2w on the axis 2x of the rotating shaft 2 is formed. More specifically, the outer surface 22A forms a rotationally symmetric surface whose surface shape does not change even if the outer surface 22A is rotated about the axis direction of the rotary shaft 2, and forms a streamline shape that continues from the outer surface 21A of the nacelle 21. Yes. The outer surface 21A, 22A of the nacelle 21 and the hub 22 here forms a spherical surface as a whole, and the spherical surface 21A, 22A has an upstream vertex portion 21a that is more downstream than the downstream vertex portion 22a. It has an oval shape with a large radius of curvature.

  Note that at least a part of the nacelle 21 is located inside the cylindrical wind tunnel portion 31 and the rest protrudes outside the cylindrical wind tunnel portion 31. The nacelle 21 of the present embodiment is arranged such that the apex portion 21a protrudes from the inside of the tubular wind tunnel portion 31 on the wind receiving side of the wind turbine 3 (upstream side in the wind receiving direction 2w). Further, a hub 22 that connects each blade 30 and the rotary shaft 2 is provided on the downstream side of the nacelle 21 in the wind receiving direction 2w. That is, the blade 30 is provided downstream of the nacelle 21 in the wind receiving direction 2w, and the rotational force obtained by the downstream blade 30 is positioned upstream of the wind receiving direction 2w via the rotary shaft 2. Is transmitted to the generators 5 and 9 side. As shown in FIG. 5, the hub 22 is formed in a disk shape, and a shaft fixing portion 221 whose center portion is fixed to a downstream end portion in the wind receiving direction 2 w of the rotating shaft 2 by a fastening member, and a shaft fixing portion. 221 has a cylindrical blade mounting portion 222 fixed by a fastening member to the outer peripheral portion of the downstream main surface in the wind receiving direction 2w, and a plurality of blades 30 radially from the outer peripheral surface of the blade mounting portion 222. Is extended.

  The nacelle 21 can change the direction in the horizontal plane in accordance with the wind direction with respect to the upper end portion 110T of the column (tower) 110 extending from the foundation portion 190 of the ground surface (rotates around the vertical axis 110x of the column 110). Is possible). At this time, the cylindrical wind tunnel portion 31 that covers each blade 30 from the outer peripheral side is also provided on the downstream side of the wind receiving direction 2 w of the nacelle 21, so that the cylindrical wind tunnel portion 31 receives the wind receiving direction of the wind turbine 3. It functions as a tail-like means that changes 2w. That is, when the cylindrical outer peripheral surface 31C (particularly the surface in the horizontal direction) of the cylindrical wind tunnel portion 31 receives wind, the cylindrical wind tunnel portion 31 rotates relative to the upper end portion 110T of the column 110, and the apex portion 21a of the nacelle 21 comes in the direction that the wind comes. Turn. Further, since the cylindrical wind tunnel portion 31 is positioned downstream of the nacelle 21 in the wind receiving direction 2w, the direction of the nacelle 21, that is, the direction of the wind receiving surface of the windmill 3 is finely changed by a slight change in the wind direction. It is also possible to prevent this.

  FIG. 5 is a cross-sectional view of the nacelle of FIG. 4 cut along a plane passing through the axes 2x and 110x. Inside the nacelle 21, the second generator 9, the flywheel 7, the first generator 5 and Are arranged in this order from the upstream side in the wind receiving direction 2 w of the wind turbine 3, and are fastened and fixed to the nacelle 21 by the fastening member 103. As shown in FIG. 6, the internal space in the generator case body 100 stores the upstream storage space 9 </ b> S for storing the second generator 9 and the flywheel 7 in order from the upstream side in the wind receiving direction 2 w. It has an intermediate housing space 7S and a downstream housing space 5S that houses the first generator 5, and forms a continuous space. This one-piece space is divided into an upstream-side accommodation space 9S and a downstream-side accommodation space 5S by the flywheel 7 being arranged in the intermediate accommodation space 7S. Similarly, the cylindrical intermediate storage space 7S is larger in diameter than the cylindrical upstream storage space 9S and the downstream storage space 5S, and the flywheel 7 itself to be stored is also the intermediate storage space 7S in the radial direction. Since the upstream storage space 9S and the downstream storage space 5S communicate with each other only on the outer peripheral side of the flywheel 7, when the flywheel 7 is disposed, It is surely separated.

  The first generator 5 and the second generator 9 in the generator case body 100 are positioned with the flywheel 7 in between in the axial direction of the rotary shaft 2, and the space in the generator case body 100 is The flywheel 7 separates the upstream storage space 9S and the downstream storage space 5S. Thereby, the other space does not receive the influence of the turbulence of the air flow accompanying the rotation of the rotating body (rotor 92, 52) in one of the upstream housing space 9S and the downstream housing space 5S. . In the present embodiment, the second generator 9, the flywheel 7, and the first generator 5 are positioned in this order from the upstream side in the wind receiving direction 2w, and the hub 22 is positioned further downstream. The flywheel 7 may be made of a magnetic shielding material (for example, a soft magnetic material such as iron), whereby the space inside the power generation case body 100 is separated from the first generator 5 side and the second by the flywheel 7. The generator 9 side may be magnetically separated to prevent mutual magnetic interference.

  The rotating shaft 2 is attached via the bearing device 60 so as to penetrate the power generation case body 100 in the axial direction of the power generation case body 100 and smoothly rotate relative to the power generation case body 100 (see FIG. 6). The bearing device 60 of the present embodiment is a sealed bearing device having a sealing function such as a sealing device (O-ring or the like) or grease, and is sealed by the sealing function. The inside of the sealed generator case body 100 is depressurized so that the resistance (air resistance) due to the filling gas received by the internal rotors 51, 91, 7 and the like is reduced when air is filled at atmospheric pressure. It is an internal state such as a state. Here, by filling the power generation case body 100 with He gas, the rotational resistance of the rotors 51 and 91 and the flywheel 7 which are rotating bodies is reduced.

  The first generator 5 and the second generator 9 include a plurality of magnetic members 52 at predetermined intervals along the circumferential direction of rotors (generator rotors) 51 and 91 that can rotate around the rotation shaft 2. 92, a stator (generator that is opposed to the magnetic members 52 and 92 in the form of an air gap, and is arranged non-rotating with respect to the rotors 51 and 91 is disposed. (Stator) 53, 93, and electric power is generated by relative rotation between the magnetic members 52, 92 and the stator coils 54, 94. The generated power (generated power) increases as the relative rotational speed increases. The magnetic members 52 and 92 in the present embodiment are permanent magnets, and for example, neodymium magnets can be used. However, an electromagnet may be used instead of the permanent magnet.

  In the present embodiment, the ratio of the numbers of the magnetic members 52 and 92 and the stator coils 54 and 94 is 3: 4, and three-phase AC power is output from the stator coils 54 and 94. Slip rings 110SA and 110SB are provided at the upper end shaft portion provided at the upper end portion 110T of the support column 110. From the stator coils 54 and 94 via the brushes 102CA and 102CB sliding on the slip rings 110SA and 110SB, respectively. The power generation output is configured to be taken out. The extracted power generation output is connected to the output unit 10 via a wiring passing through the internal space of the cylindrical column (tower) 110.

  Both the stators 53 and 93 in the first generator 5 and the second generator 9 are cylindrical members that are formed to protrude from the generator case body 100 toward the inside of the case along the axial direction of the rotary shaft 2. Provided. As shown in FIG. 7, the cylindrical members 53 and 93 are formed with openings 57 and 97 penetrating in the radial direction at predetermined intervals along the circumferential direction. These openings 57 and 97 are partitioned by column portions 56 and 96 extending in the axial direction of the rotating shaft 2 provided in the circumferential direction. As shown in FIGS. 8B and 8C, the stator coils 54 and 94 are wound around the column portions 56 and 96. In this embodiment, winding is performed by the adjacent column portions 56 and 96. The direction is reversed.

  The stators 53 and 93 of this embodiment will be described in detail.

  The stators 53 and 93 of the present embodiment are each formed as a cylindrical member and have the same shape so that they are interchangeable. These cylindrical members 53 and 93 are curable resins having heat resistance (for example, thermosetting molding materials mainly composed of an unsaturated polyester resin and configured by a filler and glass fibers), as shown in FIG. As described above, in the power generation case body 100, the main back surfaces (case inner surfaces) 121B and 122B of the main surface portions 121 and 122 that form the main surfaces 121A and 122A exposed to the outside on the upstream side and the downstream side in the wind receiving direction 2w. Then, it is arranged in a shape protruding in a cylindrical shape along the axial direction of the rotary shaft 2 toward the inside of the case.

  More specifically, the cylindrical members 53 and 93 are fitted into annular fitting grooves 121C and 122C provided on the main back surfaces (surfaces inside the case) 121B and 122B of the main surface portions 121 and 122, respectively. The fitting fixing portions 53A and 93A to be fixed, and the respective column portions 56 extending in the axial direction of the rotary shaft 2 in the form of forming a radial step (radial direction) in the fitting fixing portions 53A and 93A. , 96 and cylindrical connecting portions 53D, 93D for connecting the column portions 56, 96 in a cylindrical shape at their extended tip portions (ends opposite to the main surface portions 121, 122) 56D, 96D. Configured. The cylindrical members 53 and 93 have high strength because both ends of the column portions 56 and 96 are connected by the annular members (the fitting fixing portions 53A and 93A and the cylindrical connecting portions 53D and 93D). The cylindrical members 53 and 93 of the present embodiment are fastened and fixed to the main surface portions 121 and 122 by fastening members (bolts or the like) 109 and 109 in the fitting fixing portions 53A and 93A.

  Further, as shown in FIGS. 7 and 8, the outer peripheral surface 531 is provided on the extended distal end side of the outer peripheral surfaces 531 and 931 of the fitting and fixing portions 53A and 93A (the side opposite to the fitting fixing portions 53A and 93A). , 931 have outer peripheral side standing surfaces 561 and 961 that rise radially outward. Therefore, steps 56A and 96A are formed by the outer peripheral surfaces 531 and 931 of the fitting and fixing portions 53A and 93A, the outer peripheral side standing surfaces 561 and 961, and the radially outer surfaces 562 and 962 of the column portions 56 and 96. Has been. On the other hand, the cylindrical connecting portions 53D and 93D described above are formed on the opposite sides of the step portions 56A and 96A in the respective column portions 56 and 96, and the cylindrical connecting portions 53D and 93D are connected to the respective column portions. The extended tip portions 56D and 96D of the extended portions 56 and 96 extend in the circumferential direction from the radially inner end portions to the adjacent column portions 56 and 96, and the whole forms an annular shape. Therefore, the radially outer surfaces 562 and 962 of the column portions 56 and 96, the side surfaces 563 and 963 in the circumferential direction of the extending tip portions 56D and 96D of the column portions 56 and 96, and the column portions 56 and 96 Steps 56B and 96B are formed by the radially outer surfaces 532 and 932 of the cylindrical coupling portions 53D and 93D extending in the circumferential direction from the radially inner ends of the extending tips 56D and 96D.

  The stator coils 54 and 94 of the present embodiment are wound in an annular shape with the axes 5x and 9x in the radial direction with respect to the axis 2x. Here, the pillars 56 and 96 are wound in a square shape by using the steps 56A and 96A and 56B and 96B. Specifically, the stator coils 54 and 94 include one end surfaces 561 and 961 in the extending direction of the column portions 56 and 96 (the axial direction of the rotary shaft 2), the other end surfaces 564 and 964, and the column portions. It winds around the annular surface formed by one side 563,963 in the circumferential direction of 56,96 and the other side 563,963. At this time, the outer peripheral surfaces 531 and 931 of the fitting fixing portions 53A and 93A forming the lower surface of the step at the steps 56A and 96A, and the radially outer surface 532 of the cylindrical connecting portions 53D and 93D forming the lower surface of the step at the steps 56B and 96B. 932 function as a winding position restricting portion (winding position restricting means) for restricting the winding position of the stator coils 54, 94 wound around the pillar portions 56, 96 on the radially inner side with respect to the axis 2x of the rotating shaft 2. As a result, the stator coils 54 and 94 are stably wound around the column portions 56 and 96.

  Moreover, each pillar part 56 and 96 has protrusion part 56E and 96E further extended in the same direction from the radial direction outer side edge part of the extension front-end | tip parts 56D and 96D. The protrusions 56E and 96E serve as winding position restricting portions (winding position restricting means) that restrict the winding positions of the stator coils 54 and 94 wound around the pillars 56 and 96 on the radially outer side with respect to the axis 2x of the rotating shaft 2. This also functions as a factor for stably winding the stator coils 54 and 94 around the column portions 56 and 96. As described above, in the present embodiment, the position of the stator coils 54 and 94 is restricted inside and outside in the radial direction, so that the stator coils 54 and 94 are stably wound around the column portions 56 and 96. This makes it easy for the operator to perform the winding work.

  The rotor 51 of the first generator 5 of this embodiment will be described in detail.

  As shown in FIG. 6, the first generator 5 of the present embodiment includes, as the rotor 51, a first rotor portion 51 </ b> A and a second rotor portion 51 </ b> B that are coaxial with the rotary shaft 2 and rotate integrally with each other. Both of the rotor portions 51A and 51B have opposing surfaces 51SA and 51SB that face each other (facing each other) via an air gap, and a plurality of magnetic members 52 in the circumferential direction are provided on both the opposing surfaces 51SA and 51SB. Are arranged at the same intervals and fixed by a fastening member. However, the magnetic member 52A (52) of one rotor part 51A and the magnetic member 52B (52) of the other rotor part 51B are different from each other as shown in FIG. The magnetized surfaces of polarities (magnetic poles) face each other. Further, the stator coil 54 of the stator 53 is located in the gap between the first rotor portion 51A and the second rotor portion 51B. As shown in FIG. 9, the stator coil 54 has a predetermined interval along the circumferential direction in an annular facing region on the stator 53 sandwiched between the magnetic members 52 and 52 of both of the rotating rotor portions 51A and 51B. Several are arranged every other.

  Further, in the first generator 5, the first rotor portion 51 </ b> A and the second rotor portion 51 </ b> B are arranged to face each other in the radial direction (radial direction) with respect to the axis 2 x of the rotating shaft 2. In the present embodiment, as the main body portion of the rotor 51, a shaft fixing portion 50C fixed so as to rotate integrally with the rotary shaft 2, a disk-shaped intermediate portion 50B extending radially outward from the shaft fixing portion 50C, And a rotor main body 50 having an outer end 50A on the radially outer side of the intermediate portion 50B. However, the rotor body 50 is lighter and has a smaller diameter than the flywheel 7 having a large weight on the outer peripheral side. The cylindrical portion 51A forming the first rotor portion and the cylindrical portion 51B having a diameter larger than the cylindrical portion 51A forming the second rotor portion are both rotated integrally with each other so as to be coaxial with the rotor body 50. Both are fixed to the outer end 50A. Thus, in this embodiment, it is possible to provide both the first rotor portion 51A and the second rotor portion 51B by simply attaching one rotating body (rotor main body portion 50) to the rotating shaft 2. The first rotor portion 51 </ b> A and the second rotor portion 51 </ b> B are simpler than the case of fixing the rotating shaft 2 as separate rotating bodies. The intermediate portion 50B is thinner than the fixing portion 50A1 of the inner peripheral side shaft fixing portion 50C and the outer end portion 50A with the first rotor portion 51A (the axial direction width of the rotating shaft 2).

  In the first generator 5 of the present embodiment, the outer end portion 50A of the rotor main body 50 includes an inner peripheral side fixing portion 50A1 for fixing the inner peripheral side cylindrical portion 51A forming the first rotor portion, And an outer peripheral side fixing portion 50A2 for fixing the outer peripheral side cylindrical portion 51B forming the second rotor portion. The inner peripheral side fixing portion 50A1 has a cylindrical shape protruding in the axial direction of the rotating shaft 2, while the outer peripheral side fixing portion 50A2 has a shape extending from the intermediate portion 50B so as to continue in the radial direction.

  The cylindrical portion 51A forming the first rotor portion in the first generator 5 includes a cylindrical fitting portion 51A1 that fits on the outer peripheral side of the cylindrical inner peripheral side fixing portion 50A1 of the rotor main body portion 50, and an inner portion An annular contact portion 51A2 extending radially inward from the end portion of the fitting portion 51A1 so as to contact the extended distal end surface of the peripheral side fixing portion 50A1. The outer peripheral surface of the cylindrical fitting portion 51A1 is an arrangement surface 51SA of the magnetic member 52, while the annular contact portion 51A2 is fixed to the rotor main body 50 (inner peripheral side fixing portion 50A1). It functions as a part. Specifically, the cylindrical portion 51A forming the first rotor portion is fastened and fixed to the inner peripheral side fixing portion 50A1 of the rotor main body 50 by the fastening member 106A at a plurality of locations in the circumferential direction of the contact portion 51A2. .

  The cylindrical portion 51B forming the second rotor portion in the first generator 5 has a cylindrical shape as a whole. Of these, one end 51B2 is fixed in such a manner that the tip end surface is in contact with the outer peripheral side region of the surface of the outer peripheral side fixing portion 50A2 of the rotor main body 50 on the side where the inner peripheral side fixing portion 50A1 extends. The other end 51B1 side forms a fixed portion, and the inner peripheral surface thereof is opposed (facing) to the outer peripheral surface of the fitting portion 51A1 of the cylindrical portion 51A forming the first rotor portion in the radial direction, and the inner peripheral surface The surface is an arrangement surface 51SB of the magnetic member 52. The cylindrical portion 51B forming the second rotor portion is fastened and fixed to the outer peripheral side fixing portion 50A2 of the rotor main body 50 by the fastening member 106B at a plurality of locations in the circumferential direction of the one end portion 51B2.

  The annular corner 55B formed between the side surface opposite to the main surface 121 side of the power generation case pair 100 and the inner peripheral surface of the column portion 56 on the fitting and fixing portion 53A side of the stator 53 is provided. An annular curved surface that is recessed toward the side away from the first rotor portion 51 in the axial direction of the rotary shaft 2 is formed so as not to contact the first rotor portion 51 on the inner peripheral side. The corner portion 55B is adjacent to the cylindrical portion 51A on the inner peripheral side forming the first rotor portion and the magnetic member 52 fixedly installed on the outer peripheral surface thereof, and is in non-contact with both of them. As described above, the two curved surfaces 55B1 and 55B2 that are recessed in the direction away from them are formed adjacent to each other.

  The rotor 91 of the second generator 9 of this embodiment will be described in detail.

  As shown in FIG. 6, the second generator 9 of the present embodiment includes a first rotor portion 91 </ b> A and a second rotor portion 91 </ b> B that are coaxial with the rotary shaft 2 and rotate together with the flywheel 7 as a rotor 91. Have Both of the rotor portions 91A and 91B have opposing surfaces 91SA and 91SB that face each other (facing each other) with an air gap therebetween, and a plurality of magnetic members 92 are provided on the opposing surfaces 91SA and 91SB in the circumferential direction. Are arranged at the same intervals and fixed by a fastening member. However, of these two rotors 91A and 91B, the magnetic member 92A (92) of one rotor portion 91A and the magnetic member 92B (92) of the other rotor portion 91B have different polarities as shown in FIG. The magnetized surfaces of the (magnetic pole) face each other. Further, the stator coil 94 of the stator 93 is located in the gap between the first rotor portion 91A and the second rotor portion 92A. As shown in FIG. 9, the stator coil 94 is provided at predetermined intervals along the circumferential direction in an annular facing region on the stator 93 sandwiched between the magnetic members 92 and 92 of both of the rotating rotors 91A and 91B. A plurality are arranged.

  In the second power generator 9, the first rotor portion 91 </ b> A and the second rotor portion 91 </ b> B are arranged to face each other in the radial direction (radial direction) with respect to the axis 2 x of the rotating shaft 2. 91 A of 1st rotor parts are the cylindrical part 91A which makes a 1st rotor part, and the 2nd rotor part with respect to the fixing | fixed part 90A formed in the intermediate part (an outer peripheral edge part may be sufficient) of the outer peripheral side of the flywheel 7. The cylindrical portion 91B having a diameter larger than that of the cylindrical portion 91A is fixed to the flywheel 7 so as to rotate integrally therewith. In this case, it is possible to provide both the first rotor portion 91A and the second rotor portion 91B by simply attaching one rotating body (flywheel 7) to the rotating shaft 2, and the second rotating portion 91B can be provided with respect to the rotating shaft 2. The configuration is simpler than the case where the first rotor portion 91A and the second rotor portion 91B are fixed as separate rotating bodies.

  The flywheel 7 according to the present embodiment includes a shaft fixing portion 70C that is fixed to the rotating shaft 2 via a one-way clutch (one-way clutch) 6, and a disk shape that extends radially outward from the shaft fixing portion 70C. The intermediate portion 70B and the fixing portion 70A on the radially outer side of the intermediate portion 70B. In the present embodiment, the outer peripheral end portion 70D that extends radially outward from the fixing portion 70A is further provided. The rotor body 50 is larger in diameter and heavier than the rotor body 50 and functions as a rotational energy storage means. The intermediate portion 70B is thinner in thickness (the axial width of the rotating shaft 2) than the inner peripheral shaft fixing portion 70C, the outer peripheral fixing portion 70A, and the outer peripheral end portion 70D. In particular, the fixed portion 70A and the outer peripheral end portion 70D are formed thicker than the intermediate portion 70B and are heavier, so that a larger centrifugal force acts on the outer peripheral side where the rotor 91 is formed.

  In the second generator 9 of the present embodiment, the fixing portion 70A of the flywheel 7 includes an inner peripheral side fixing portion 70A1 for fixing the inner peripheral side cylindrical portion 91A forming the first rotor portion, and a second And an outer peripheral side fixing portion 70A2 for fixing the outer peripheral side cylindrical portion 91B forming the rotor portion.

  In the second generator 9, both the cylindrical portion 91A forming the first rotor portion and the cylindrical portion 91B forming the second rotor portion form a cylindrical shape as a whole. Each one end 91A2, 91B2 is fixed in such a manner that the front end surface is in contact with the surface of the fixing portion 70A (70A1, 70A2) of the flywheel 7 opposite to the first generator 5. Make a fixed part. Of the other end portions 91A1 and 91B1, the end portion 91A1 side is opposed (facing) in the radial direction to the inner peripheral surface 91SB of the cylindrical portion 91B whose outer peripheral surface 91SA forms the second rotor portion. On the part 91B1 side, the inner peripheral surface 91SB is opposed (facing) in the radial direction to the outer peripheral surface 91SA of the cylindrical portion 91A forming the first rotor portion, and the outer peripheral surface 91SA and the inner peripheral surface 91SB are the magnetic member 92, 92 are arranged. The fixed portions 70A1 and 70A2 of the flywheel 7 are opposite to the first generator 5 so as to fit the end portions 91A2 and 91B2 of the cylindrical portions 91A and 91B forming the first rotor portion and the second rotor portion. It is the fitting groove part in which the cyclic | annular groove | channel recessed in the axial direction of the rotating shaft 2 formed in this surface was formed. Both the cylindrical portion 91A forming the first rotor portion and the cylindrical portion 91B forming the second rotor portion are fitted with the end portions 91A2 and 91B2 in the annular grooves of the fitting groove portions 70A1 and 70A2, and the end portions 91A2 , 91B2 are fastened and fixed to the fixing portion 70A of the flywheel 7 by the fastening members 107A, 107B at a plurality of locations in the circumferential direction.

  An annular corner portion 95B formed between the side surface opposite to the main surface portion 122 side of the power generation case pair 100 and the inner peripheral surface of the column portion 96 on the fitting fixing portion 93A side on the stator 93 side. Is formed with an annular curved surface that is recessed toward the side away from the first rotor portion 91 in the axial direction of the rotary shaft 2 so as not to contact the first rotor portion 91 on the inner peripheral side. The corner portion 95B is adjacent to a cylindrical portion 91A on the inner peripheral side that forms the first rotor portion and a magnetic member 92 that is fixedly installed on the outer peripheral surface, and is not in contact with both of them. As described above, two curved surfaces 95B1 and 95B2 are formed adjacent to each other in the proximity of both of them so as to be away from them.

  On the other hand, as shown in FIG. 2, the electric motor 70 is a motor that drives the flywheel 7 to rotate in a constant rotational direction using only the electric power generated by the first generator 5 as a drive source. It is driven by the driving power supplied from. In the electric motor 70, a plurality of magnetic members 72 are arranged at predetermined intervals along the circumferential direction of a rotor (electric motor rotor) 71 that can rotate around the rotating shaft 2, and an air gap is formed with respect to the magnetic members 72. The stator (electric motor stator) 73 is provided with a stator coil 74 that is opposed to the rotor 72 and is non-rotating with respect to the rotor 72. In addition, the magnetic member 72 in this embodiment is a permanent magnet, for example, a neodymium magnet etc. can be used. However, an electromagnet may be used instead of the permanent magnet. When the excitation current is supplied from the drive power supply unit 16 to the stator coil 74, the electric motor 70 rotationally drives the flywheel 7 in the constant rotation direction to increase the rotation speed. The rotational driving force of the electric motor 70 increases as the supplied power (generated power) increases. That is, the larger the power generated by the first generator 5, the larger the power.

  In the present embodiment, the ratio of the number of the magnetic member 72 and the stator coil 74 is 3: 4, and three-phase AC power is input to the stator coil 74 as drive power. The driving power supply unit 16 is provided inside the nacelle 21.

  In the present embodiment, the second generator 9 and the electric motor 70 are provided integrally with the flywheel 7. Further, in the flywheel 7, the rotor 71 (72) and the stator 73 (coil 74) of the electric motor 70 are more peripheral than the rotor 91 (magnetic member 92) and the stator 93 (coil 94) of the second generator 9. Located on the side.

  A stator 73 in the electric motor 70 is provided in the generator case body 100. In the present embodiment, as shown in FIG. 6, the stator 73 is a cylindrical member and has a larger diameter than the first and second generators 5 and 9 side that accommodates the flywheel 7 in the power generation case body 100. The intermediate housing space 7 </ b> S is disposed and fixed integrally with the inner peripheral surface of the cylindrical outer peripheral wall portion 127 that forms the outer peripheral wall of the intermediate housing space 7 </ b> S. In addition, the stator 73 of the present embodiment has a similar shape to the stators 53 and 93 of the generators 5 and 9. More specifically, the stator 73 is formed with openings 77 penetrating in the radial direction at predetermined intervals along the circumferential direction, and these openings 77 are formed in the diameter of the rotating shaft 2 provided in the circumferential direction. Each column part 76 protrudes inward in the direction. A stator coil 74 is wound around each column portion 76, and in this embodiment, the winding direction is opposite in the adjacent column portion 76. The stator 73 of the electric motor 70 has a cylindrical shape having a larger diameter than the stators 53 and 93 of the generators 5 and 9.

  In addition, the cylindrical stator 73 of the present embodiment is a curable resin having heat resistance (for example, a thermosetting molding material mainly composed of an unsaturated polyester resin and configured by a filler and glass fiber). 6, main back surfaces (surfaces inside the case) 123B of the annular side wall portions 123 and 124 that cover the outer peripheral side of the intermediate housing space 7S of the power generation case body 100 on the upstream side and the downstream side in the wind receiving direction 2w. From one side of 124B, it arrange | positions in the form which protrudes in a cylinder shape along the axial direction of the rotating shaft 2 toward the other main back surfaces 123B and 124B.

  Specifically, the cylindrical stator 73 has an annular fitting groove provided on one of the main back surfaces (surfaces inside the case) 123B and 124B of the annular side wall portions 123 and 124 (here, the main back surface 123B). The fitting fixing portion 73A that is fixed in a form that fits to 123C, and the axial direction of the rotary shaft 2 that extends in the radial direction (radial direction) in the fitting fixing portion 73A are described above. Each column part 76 and cylindrical connection part 73D which connects these column parts 76 at the extended front-end | tip part (here the edge part by the side of the main back surface 123B) 76D are comprised. The cylindrical stator 73 has high strength because both ends of each column part 76 are connected by an annular member (a fitting and fixing part 73A and a cylindrical connecting part 73D). The tubular member 73 of the present embodiment is fastened and fixed by a fastening member (bolt or the like) 126 to one of the annular side wall portions 123 and 124 in the fitting fixing portion 73A.

  Further, as shown in FIG. 11 and FIG. 12, the extending distal end side of the outer peripheral surface 731 of the fitting and fixing portion 73A (on the side opposite to the fitting and fixing portion 73A) stands radially outward from the outer peripheral surface 731. It has a rising outer peripheral surface 761. For this reason, a step 76 </ b> A is formed by the outer peripheral surface 731 of the fitting fixing portion 73 </ b> A, the outer peripheral side vertical surface 761, and the radially outer surface 762 of the column portion 76. On the other hand, the cylindrical connecting portion 73D described above is formed on the opposite side of the stepped portions 76A in each column portion 76, and this cylindrical connecting portion 73D is formed on the extending tip portion 76D of each column portion 76. It extends in the circumferential direction from the radially inner end, and extends to the adjacent column part 76, and the whole forms an annular shape. Therefore, the radially outer surface 762 of the column portions 56 and 96, the side surface 763 in the circumferential direction of the extending tip portion 76D of the column portion 76, and the radially inner end of the extending tip portion 76D of the column portion 76 A step 76B is formed by a radially outer surface 732 of the cylindrical connecting portion 73D extending in the circumferential direction from the portion.

  The stator coil 74 of the present embodiment is wound in an annular shape having an axis 7x in the radial direction with respect to the axis 2x. Here, each columnar portion 76 is wound in a square shape using the steps 76A and 76B described above. Specifically, the stator coil 74 includes one end surface 761 in the extending direction of the column portion 76 (the axial direction of the rotary shaft 2), the other end surface 764, and one side surface in the circumferential direction of the column portion 76. 763 and the other side surface 763 are wound around the annular surface. At this time, the outer peripheral surface 731 of the fitting fixing portion 73A that forms the lower surface of the step at the step 76A and the radially outer surface 732 of the cylindrical connecting portion 73D that forms the lower surface of the step at the step 76B are wound around the column portion 76. The stator coil 74 functions as a winding position restricting portion (winding position restricting means) that restricts the winding position on the radially outer side with respect to the axis 2x of the rotating shaft 2, whereby the stator coil 74 is stably attached to each column portion 76. It is wrapped around.

  Each column portion 76 has a protrusion 76E that further extends in the same direction from the radially outer end portion of the extending tip portion 76D. The protrusion 76E functions as a winding position restricting portion (winding position restricting means) that restricts the winding position of the stator coil 74 wound around the pillar portion 76 on the radially outer side with respect to the axis 2x of the rotating shaft 2. Also, the stator coil 74 can be stably wound around each column portion 76. As described above, in this embodiment, since the position of the stator coil 74 is regulated inside and outside in the radial direction, the stator coil 74 can be kept stably wound around each column portion 76, and can be determined by the operator. Winding work is also easy.

  The rotor 71 in the electric motor 70 is coaxial with the rotary shaft 2 and rotates integrally with the flywheel 7. On the surface of the rotor 71 facing the stator coil 74, the same number of magnetic members 72 are arranged at predetermined intervals in the circumferential direction, and are fixed by fastening members. As shown in FIG. 13, a plurality of stator coils 74 are arranged at predetermined intervals along the circumferential direction in an annular facing region on the stator 73 concentrically facing the magnetic member 72 between the rotating rotors 71. Is done. In the present embodiment, the magnetic member 72 and the stator 74 are opposed to each other in the radial direction with respect to the axis 2x of the rotating shaft 2.

  Further, the rotor 71 in the electric motor 70 of the present embodiment can be said to be the tip of the flywheel 7, more specifically, the outer peripheral end portion 70 </ b> D of the flywheel 7, and rotates integrally with the flywheel 7 in a coaxial manner. The tip 71 of the outer peripheral end portion 70 </ b> D of the flywheel 7 has at least a portion protruding toward one or both axial directions of the rotary shaft 2, thereby ensuring a large area of the outer peripheral surface 71 </ b> S. Are directly installed on the outer peripheral surface 71S, and each is fastened and fixed by a fastening member. That is, the outer peripheral surface 71 </ b> S of the flywheel 7 is an arrangement surface for the magnetic members 92 and 92. The magnetic member 72 and the stator coil 74 of the electric motor 70 of the present embodiment are provided at different positions from the magnetic members 52 and 92 and the stator coils 54 and 94 of the first generator 5 and the second generator 9 and are different. Even if the flywheel 7 is rotating by the electric motor 70, the second generator 9 generates power.

  By the way, the support | pillar 110 is being fixed with respect to the lower end part 102 of the electric power generation case body 100 which accommodates the generators 5 and 9 and the flywheel 7 which were mentioned above, as shown in FIG. The power generation case body 100 is fixed to the nacelle 21.

  As described above, the power generation case body 100 can rotate together with the nacelle 21 at the upper end portion 110T of a column (tower) 110 extending from the ground surface. The lower end of the nacelle 21 is provided with a lower end opening 21H penetrating up and down inside and outside, and a column fixing portion 102C fixed to the lower end portion 102 (102A, 102B) of the power generation case body 100 penetrates the lower end opening 21H. The nacelle 21 is arranged so as to protrude to the outside. The column fixing portion 102C is formed in a cylindrical shape that opens to the lower end, and the upper end portion 110T of the column 110 is inserted into the opening, and a bearing is provided between both the column fixing portion 102C and the upper end portion 110T of the column 110. With the device 63 interposed, the power generation case body 100 side is assembled to the column 110 so as to be rotatable around the column axis 110x. Brushes 102CA and 102CB are attached to the support post fixing part 102C of the power generation case body 100, and slip rings 110SA and 110SB are attached to the shaft part 110TA of the support upper end part 110T so that they can slide with each other. ing. The electric power generated by the generators 5 and 9 is output to the output unit 10 through the brushes 102CA and 102CB and the slip rings 110SA and 110SB.

  As shown in FIG. 5, the lower end portion 102 (102A, 102B) of the power generation case body 100 is fixed integrally with the support post fixing portion 102C. The power generation case body 100 according to the present embodiment includes small-diameter cylindrical outer peripheral wall portions 129 and 125 that form outer peripheral walls of the upstream storage space 9S and the downstream storage space 5S, and the outer peripheral wall of the intermediate storage space 7S therebetween. The cylindrical outer peripheral wall portion 127 having a larger diameter than those forming the outer peripheral wall portion 127 is formed, and the column fixing portion 102C has a lower end protruding portion of the large-diameter cylindrical outer peripheral wall portion 127 formed on the rotary shaft 2. The sandwiching portions 102G sandwiched from both sides in the axial direction, and the lower end surfaces of the cylindrical outer peripheral wall portions 129 and 125 having small diameters spread in the direction opposite to each other in the axial direction of the rotary shaft 2 at the upper ends of the sandwiching portions 102G. Contact portions 102S and 102S to be contacted, and are fastened and fixed by fastening members 108 and 108 to the lower end protruding portion of the cylindrical outer peripheral wall portion 127 in the sandwiching portion 102G.

  Further, the power generation case body 100 of the present embodiment is divided into two parts, an upstream case body 100A and a downstream case body 100B, at an intermediate position of the intermediate housing space 7S in the wind receiving direction 2w (the axial direction of the rotating shaft 2). The case bodies 100A and 100B are brought into close contact with each other, and both the upper end portions 101A and 101B and the lower end portions 102A and 102B are fastened and fixed by fastening members (bolts) 103 and 103. Yes. On the other hand, the nacelle 21 has a fixing plate that sandwiches the upper and lower ends 101 (101A, 101B), 102 (102A, 102B) of the case bodies 100A, 100B in close contact with each other on the upstream side and the downstream side in the wind receiving direction 2w. Parts 210 and 210 are provided, and upper and lower end parts 101 (101A and 101B) and 102 (102A and 102B) of the fixing plate parts 210 and 210 and the case bodies 100A and 100B in a close contact state sandwiched therebetween. ) Is fastened and fixed by the fastening members 103 and 103 described above. Thereby, the power generation case body 100 is fixed to the nacelle 21. The fixing plate portion 210 of the present embodiment is a plate material bent in an L-shape, and includes a horizontal portion fixed to the inner upper end surface of the nacelle 21 and upper and lower portions of the case bodies 100A and 100B from the end portions of the horizontal portion. It has a hanging portion that extends downward along the peripheral side surfaces of the end portions 101 and 102 and through which the fastening member 103 is inserted.

  Although one embodiment of the present invention has been described above, this is merely an example, and the present invention is not limited to this, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible. Hereinafter, an embodiment different from the above embodiment will be described.

  In the above embodiment, as shown in FIG. 3, the drive power supply unit 16 supplies drive power for the motor 70 based on the power supplied from the external power supply system 19 </ b> A to the motor 70. As shown in FIG. 15, driving power for the electric motor 70 based on electric power stored in the electric storage means 16 </ b> B such as a battery may be supplied to the electric motor 70. Each of the drive power supply units 16 in FIG. 15 is configured to convert the power stored in the battery 16 </ b> B serving as power storage means into drive power for the electric motor 70 and supply it to the electric motor 70.

  In the case of FIG. 15 (a), the electric power generated by the first generator 5 is stored in the battery 16B as the electric storage means, and the electric power generated by the second generator 9 is output from the output unit 10. Only the input is input and supplied to the outside. Specifically, the drive power supply unit 16 in FIG. 15A includes a battery (power storage means) 16B that stores the power generated by the first generator 5 and is generated by the first generator 5. The input three-phase AC power is input to the rectifier 12 and then input to the boost controller 13, and the DC power having a predetermined voltage is supplied to and stored in the battery (power storage means) 16B. The drive power for excitation for rotationally driving the electric motor (here, a three-phase AC motor) 70 is taken out via 18 and output to the stator coil 74 of the electric motor 70. On the other hand, the output unit 10 inputs the three-phase AC power generated by the second generator 9 to the rectifier 12, inputs it to the boost controller 11, outputs it at a predetermined voltage, and further outputs it to the power condition. The power is input at the NA 15, and the input DC power is converted into system power and output to the outside. Thereby, only the electric power generated by the second generator 9 is supplied to the external power supply system 19A.

  On the other hand, in the case of FIG. 15B, both the electric power generated by the first generator 5 and the second generator 9 is stored in the battery 16B ′ as the storage means, and from the output unit 10 to the outside. Is supplied to the battery 16B ′ once. The driving power supply unit 16 in FIG. 15B inputs the three-phase AC power generated by the first generator 5 and the second generator 9 to the rectifier 12 and then boosts the controller. Is supplied to the battery (power storage means) 16B ′ to store the electric power, and the electric motor (here, a three-phase AC motor) 70 is driven to rotate through the inverter 18 from the battery 16B ′. The drive power for excitation for the purpose is taken out and output to the stator coil 74 of the electric motor 70. On the other hand, the output unit 10 inputs the stored power at the power conditioner 15 from the battery 16B ′ in which only both power generated by the first generator 5 and the second generator 9 is stored. Then, the input DC power is converted to system power and output to the outside. Thereby, both electric power produced | generated by the 1st generator 5 and the 2nd generator 9 is supplied to the external power supply system 19A.

  The driving power for the electric motor 70 is output based on the power stored in the first power storage means, and the second power storage means is generated by the first generator 5 and the second generator 9. In the case where either of the two electric powers is stored, the first power storage unit and the second power storage unit may be provided as a common power storage unit 16B as shown in FIG. You may provide as a different electrical storage means. However, power storage means 16B in which only the power generated by the first generator 5 is stored, and power storage means 16B ′ in which both power generated by the first generator 5 and the second power generator 9 are stored. Then, the storage capacity of the latter (16B ′) power storage means is larger than that of the former (16B). The external power storage means 19B also has a larger storage capacity than the power storage means 16B in which only the power generated by the first generator 5 is stored. The power storage means 16B and the power storage means 16B ′ are preferably electrically connected to the generators 5 and 9 and the electric motor 70 in a form that does not involve rotational sliding and the like, and the wiring distance is preferably short. Therefore, it is provided inside the nacelle 21. In particular, the power storage means 16B having a small capacity is suitable for mounting as an auxiliary battery in the nacelle 21 in terms of its size.

  Further, as shown in FIG. 15, when the power supplied from the output unit 10 to the outside is the power once stored in the batteries 16B and 16B ′ as the storage means, for example, as shown in FIG. A remaining amount detecting unit (remaining amount detecting unit) 702 that detects the remaining amount of the batteries 16B and 16B ′ as the storage unit, and when the detected remaining amount exceeds a predetermined first threshold remaining amount Can be configured to include a control unit (output power control means) 700 that performs supply switching control when the power stored in the batteries 16B and 16B ′ is supplied to the output unit 10 to the outside. Specifically, the control unit 700 is connected to the remaining amount detection unit 702, and the CPU executes external power supply control as shown in FIG. In FIG. 17, first, the control unit 700 acquires the remaining amount information of the battery 16B 'from the remaining amount detecting unit 702 (S11). Since the first threshold remaining level (for example, full charge level) is stored in the storage unit such as the ROM, the remaining battery level indicated by the acquired remaining amount information exceeds the first threshold remaining level. In the case (S12: Yes), the external output switching unit (switch) 10S is switched to the supply side (output side) to supply power to the outside (S13). On the other hand, when the first threshold remaining amount level is not exceeded (S12: No), the external output switching unit (switching switch) 10S is switched to the cutoff side to cut off / stop the power supply to the outside ( S14).

  Further, as shown in FIGS. 15 and 16, when the driving power of the electric motor 70 is the power once stored in the batteries 16B and 16B ′ as the power storage means, for example, as shown in FIG. A remaining amount detecting unit (remaining amount detecting unit) 702 for detecting the remaining amount of the batteries 16B and 16B ′ as a means, and whether or not the detected remaining amount exceeds a predetermined second threshold remaining amount In addition, the control unit (power storage power control unit) 700 that performs input switching control of power input to the batteries 16B and 16B ′ serving as the power storage unit for power storage can be configured. Specifically, the control unit 700 is connected to the remaining amount detection unit 702, and the CPU executes power input control to the batteries 16B and 16B 'that are power storage units as shown in FIG. In FIG. 19, first, the control unit 700 acquires the remaining amount information of the battery 16B ′ from the remaining amount detecting unit 702 (S21). Since the second threshold remaining level (for example, full charge level) is stored in the storage unit such as the ROM, the remaining battery level indicated by the acquired remaining level information exceeds the second threshold remaining level. If not (S22: No), the input switching unit (changeover switch) 14 to the battery 16B as the power storage means is switched to the battery supply side (battery input side), and the generated power is input to the battery 16B. The battery is charged (S24). On the other hand, when the second threshold remaining amount level is exceeded (S22: Yes), the input switching unit (changeover switch) 14 to the battery 16B is switched to the cut-off side (battery input prohibition side) to the battery 16B. The generated power input is shut off and stopped (S23). Alternatively, in the case of FIG. 18, when the second threshold remaining amount level is exceeded (S22: Yes), the input switching unit (switch) 14 to the battery 16B is connected to the external output side (output unit 10 side). ) To output the power generated by the first generator 5 together with the power generated by the second generator 9 from the output unit 10 to the outside (for example, the external system power 19A). It may be made (S23). In the case of FIG. 18, when the input switching unit (switch) 14 is switched to the external output side (output unit 10 side), the power boosted for input to the battery 16 </ b> B by the boost controller 13 is boosted by the output unit 10. The signal is input to the controller 11 and input to the power conditioner 15 to be externally output.

  The driving power for the electric motor 70 is output based on the power stored in the first power storage means, and the second power storage means is generated by the first generator 5 and the second generator 9. In the case where either of the two electric powers is stored, the first power storage means and the second power storage means are connected to the common power storage means 16B, 16B ′ as shown in FIG. 15 and FIG. , 19B, but may be provided as different power storage means. In particular, if one power storage means has the above-mentioned auxiliary power storage means 16B having a small capacity, it may be provided separately from the power storage means 16B ', 19B having a relatively large capacity. In particular, it may be provided separately from the external power storage means 19B.

DESCRIPTION OF SYMBOLS 1 Wind power generator 2 Rotating shaft 2x Rotating axis 2w Wind receiving direction 3 Windmill 4 Rotor 5 1st generator (electric power generation means)
6 One-way clutch (one-way clutch)
7 Flywheel 8 Rotor 9 Second generator (power generation means)
30 Blade 31 Cylindrical wind tunnel (duct)
21 Nacelle 22 Hub 100 Power generation case body 110 Post (tower)
51, 91 Rotor (generator rotor)
51A First rotor 51B Second rotor 52, 92 Magnetic member 53, 93 Stator (generator stator)
54, 94 Stator coil 70 Electric motor (electric drive means)
16 Drive power supply unit (drive power supply means)
700 Control unit (drive power control means, output power control means, stored power control means)
701 Rotation speed level detection unit (rotation speed level detection means)
702 Remaining amount detecting unit (remaining amount detecting means)

Claims (20)

A windmill that receives wind force and rotates around a predetermined axis of rotation in a constant rotation direction;
A first power generation means having a rotor arranged so as to rotate integrally with the rotation axis of the windmill, and generating electric power by rotation of the rotor accompanying rotation of the rotation shaft;
When the rotation axis is coaxial with the rotation axis and the rotation axis is increasing in the constant rotation direction, the rotation axis is integrally rotated with the rotation axis, and the rotation axis is decelerated, and the rotation axis is decelerated. A flywheel disposed through a one-way clutch so as to be inertially separated from the rotating shaft,
A second power generation different from the first power generation means, which has a rotor arranged to rotate integrally with the flywheel so as to rotate integrally, and generates electric power by the rotation of the rotor accompanying the rotation of the flywheel. Means,
Electric drive means for rotationally driving the flywheel in the constant rotational direction;
Drive power supply means for supplying drive power to the electric drive means;
Rotation speed level detection means for detecting the rotation speed level of the flywheel;
Drive power control means for causing the drive power supply means to supply drive power to the electric drive means when the detected rotation speed level falls below a predetermined threshold rotation speed level;
Out of the power generated by the first power generation means and the second power generation means, at least input of power generated by the second power generation means, and output means for outputting the input power to the outside,
A wind turbine generator comprising:   The wind power generator according to claim 1, wherein the driving power supply means supplies driving power for the electric driving means based on electric power supplied from an external power supply system to the electric driving means.   The wind power generator according to claim 1, wherein the driving power supply means supplies driving power for the electric driving means based on the electric power stored in the electric storage means to the electric driving means.   4. The output unit according to claim 1, wherein the output unit is configured to supply both power inputs generated by the first power generation unit and the second power generation unit to the outside. 5. Wind power generator. The electric power generated by the first power generation means is stored in the power storage means,
The wind power generator according to any one of claims 1 to 3, wherein the output means supplies only the electric power generated by the second power generation means to the outside. Both electric power generated by the first power generation means and the second power generation means is stored in the power storage means,
The wind power generator according to any one of claims 1 to 3, wherein the electric power supplied to the outside from the output means is electric power stored in the power storage means.   The requirement according to claim 3 and the requirement according to claim 5 or 6 are provided, and the power storage means according to claim 3 and the power storage means according to claim 5 or claim 6 are common. Is a wind power generator. A remaining amount detecting means for detecting the remaining amount of the power storage means;
8. An output power control unit that causes the output unit to supply the power stored in the power storage unit to the outside when the detected remaining amount exceeds a predetermined threshold remaining amount. The wind power generator described in 1. A remaining amount detecting means for detecting the remaining amount of the power storage means;
When the detected remaining amount does not exceed a predetermined threshold remaining amount, power is supplied to the power storage means to perform storage, and when the detected remaining amount exceeds the threshold remaining amount, the threshold remaining amount The wind power generator according to claim 7, further comprising: a stored power control unit that inputs power to be supplied to the power storage unit to the output unit and outputs the power to the outside if the power does not exceed the value.   The wind power generator according to any one of claims 1 to 9, wherein the electric driving means is an electric motor and includes a rotor that rotates integrally with the flywheel in a coaxial manner.   In the electric drive means, a plurality of magnetic members are arranged at predetermined intervals around the rotation axis of the rotary shaft on the rotor, and a stator is positioned so as to face the magnetic members. 11. The wind turbine generator according to claim 10, wherein stator coils are arranged at predetermined intervals in an annular facing region extending in the circumferential direction of the stator, where the rotating magnetic members of the rotor face each other.   The wind power generator according to claim 11, wherein, in the electric drive means, the magnetic member on the rotor and the stator positioned facing the magnetic member are opposed to each other in a radial direction with respect to the rotation axis.   The rotor in the said electric drive means is an outer peripheral end part of the said flywheel, The wind power generator of Claim 12 with which the magnetic member is arrange | positioned on the outer peripheral surface of the said outer peripheral end part.   The first power generation means and the second power generation means each have a first rotor portion and a second rotor portion that are coaxial with the rotating shaft and rotate integrally with each other as rotors, and the first rotor portion, The second rotor portion has opposing surfaces facing each other, and a plurality of magnetic members are arranged at predetermined intervals in the circumferential direction on both of the opposing surfaces, and the magnetic member of one rotor portion and the other The rotor magnetic members are opposed to each other with different polarities, and further, a stator is provided between the first rotor portion and the second rotor portion, and the stator includes both of the rotating rotors. The wind turbine generator according to any one of claims 1 to 13, wherein a stator coil is arranged at predetermined intervals in an annular facing region extending between the magnetic members and extending in the circumferential direction of the stator.   The magnetic member of the first rotor portion and the magnetic member of the second rotor portion facing opposite to each other in the radial direction face each other in the radial direction with respect to the rotation axis, and the stator coil has an axial line in the radial direction. The wind power generator according to claim 14, which is wound in a ring shape.   The rotor in the first power generation means includes a disc-shaped rotor main body portion having a shaft fixing portion that is fixed so as to rotate integrally with the rotary shaft, and the first end of the rotor is configured so that the first end of the rotor main body portion is in contact with the first end. A cylindrical part forming a rotor part and a cylindrical part having a diameter larger than the first rotor part forming the second rotor part are fixed so as to rotate integrally with each other so as to be coaxial with the rotation shaft. The wind power generator according to claim 14 or 15.   The rotor in the second power generation means includes a cylindrical portion that forms the first rotor portion with respect to the flywheel, and a cylindrical portion that forms the second rotor portion and has a larger diameter than the first rotor portion. The wind turbine generator according to any one of claims 14 to 16, wherein the wind turbine generator is fixed so as to rotate integrally with the rotary shaft.   The wind power according to any one of claims 1 to 17, wherein the flywheel is disposed between the first power generation unit and the second power generation unit in an axial direction of the rotation shaft. Power generation device.   The windmill is coaxially disposed inside a cylindrical wind tunnel portion that extends in a cylindrical shape in the axial direction of the rotating shaft, and the cylindrical wind tunnel portion is in a wind receiving direction of the wind turbine in the axial direction. The wind turbine generator according to any one of claims 1 to 18, wherein the wind power generator is formed so that the opening area becomes smaller from the upstream side to the downstream side.   A nacelle that is rotatably fixed in a horizontal plane with respect to a support extending from the ground surface, and that accommodates the first power generation means, the second power generation means, and the flywheel, is disposed on the windmill hub with respect to the windmill hub. The wind turbine generator according to claim 19, wherein the wind turbine generator is located upstream of the wind receiving direction and protrudes upstream of the cylindrical wind tunnel portion in the wind receiving direction.

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