JPH0118270B2 - - Google Patents
Info
- Publication number
- JPH0118270B2 JPH0118270B2 JP57059739A JP5973982A JPH0118270B2 JP H0118270 B2 JPH0118270 B2 JP H0118270B2 JP 57059739 A JP57059739 A JP 57059739A JP 5973982 A JP5973982 A JP 5973982A JP H0118270 B2 JPH0118270 B2 JP H0118270B2
- Authority
- JP
- Japan
- Prior art keywords
- wind
- wind turbine
- power generation
- generator
- shroud
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000010248 power generation Methods 0.000 claims description 18
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000012559 user support system Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D15/00—Transmission of mechanical power
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は風力発電装置、特に、風見を有し、常
に風上に向けられる水平軸式風車を有するタイプ
の風力発電装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wind power generation device, and particularly to a wind power generation device of the type having a horizontal axis wind turbine having a weathervane and always facing upwind.
風力発電装置には、風車軸が垂直で、特に風見
を設けなくとも風向きによらず風車軸が常に一定
の方向に効率良く回転するタイプのものと、風車
軸が水平であり、風見を設けて常に風車軸を風上
に向けて置く必要のあるタイプのものがあり、後
者には風車と発電機が共軸のものと、そうでない
ものがある。
There are two types of wind power generators: those with vertical wind turbine shafts that allow the shaft to always rotate efficiently in a fixed direction regardless of the wind direction without the need for a wind vane, and those with horizontal wind turbine shafts with a wind vane installed. There are types of wind turbines that require the shaft of the windmill to be always facing upwind, and of the latter, there are those where the wind turbine and generator are coaxial, and those where they are not.
垂直軸式風車は風車軸の向きが鉛直であるの
で、発電機の位置が風向きによらず常に一定であ
り、発電機から電力を取り出す際、ケーブル接続
等について特別な装置を必要としないものである
が、従来公知の水平共軸式のものにあつては、風
車と発電機が直結されており、発電機の位置が風
向きに応じて装置の支柱の中心軸を中心として回
動するように構成されている。このため、発電機
にケーブルを直接接続するとケーブルが捩れてし
まうので、ケーブルは発電機に直接接続できず、
スリツプリングを介して接続し、発電機が風向き
に応じて回動してもケーブルが捩れないようにす
る必要があつたが、このスリツプリングは故障の
多いものであつた。 Vertical axis wind turbines have a vertical axis, so the position of the generator is always constant regardless of the wind direction, and there is no need for special equipment such as cable connections when extracting power from the generator. However, in the conventionally known horizontal coaxial type, the wind turbine and generator are directly connected, and the position of the generator rotates around the central axis of the equipment's support depending on the wind direction. It is configured. For this reason, the cable cannot be connected directly to the generator, as doing so would cause the cable to be twisted.
It was necessary to connect via a slip ring to prevent the cable from twisting even when the generator rotated depending on the direction of the wind, but this slip ring was prone to failure.
然しながら、垂直軸式風車は風車の効率が低い
ので、水平軸式の方が一般的に推奨され、普及し
ているが、この方法で不可欠とされていたスリツ
プリングは、上述の如く故障し易いため、長期間
にわたり安定した電力を得ることが困難であると
云う問題点があつた。 However, since the efficiency of vertical axis wind turbines is low, horizontal axis types are generally recommended and more widespread, but the slip rings that are essential to this method are prone to failure as mentioned above. Therefore, there was a problem in that it was difficult to obtain stable power over a long period of time.
また、発電機軸が鉛直であり、水平風車軸にベ
ベルギア等で回転を伝達する方式のものもある
が、これは機械的効率や騒音等の点で問題があつ
た。 There is also a system in which the generator shaft is vertical and the rotation is transmitted to the horizontal wind turbine shaft using a bevel gear, etc., but this has problems in terms of mechanical efficiency, noise, etc.
本発明は叙上の観点に立つて為されたものであ
つて、その目的とするところは、スリツプリング
の必要のない水平共軸式の風力発電装置に於て、
風向きの変化に左右されず、発電が中断したり、
装置に無理な応力が生じることなく、高い発電量
を得ることができる風力発電装置を提供すること
にある。
The present invention has been made based on the above-mentioned viewpoints, and its purpose is to provide a horizontal coaxial wind power generation device that does not require a slip ring.
Regardless of changes in wind direction, power generation may be interrupted,
It is an object of the present invention to provide a wind power generation device that can obtain a high amount of power generation without causing excessive stress to the device.
而して、上記の目的は、風見と、常に風上に向
けられる水平軸式風車と、上記風車と共軸に設け
られた発電機とから成る水平共軸式の風力発電装
置に於て、
上記風車が軸直角中心面に対して対称な環状翼
列を有し、風車及び発電機の支軸の回りの回転角
を一回転以内に規制する装置を具備する風力発電
装置によつて達成される。
Therefore, the above object is to provide a horizontal coaxial wind power generation device consisting of a weather vane, a horizontal axis wind turbine that is always directed upwind, and a generator installed coaxially with the wind turbine. This is achieved by a wind power generation device in which the wind turbine has an annular blade row that is symmetrical with respect to a central plane perpendicular to the axis, and is equipped with a device that regulates the rotation angle around the spindle of the wind turbine and generator to within one rotation. Ru.
而して、本願発明によるときには、スリツプリ
ング等を必要とせず、従つて故障等が殆どなく、
風向きの変化に左右されず、発電が中断したり、
装置に無理な応力が生じることなく、更には、機
械的損失が少なく、高い発電量を得ることができ
る。
Therefore, according to the present invention, there is no need for a slip ring or the like, so there are almost no failures, etc.
Regardless of changes in wind direction, power generation may be interrupted,
A high amount of power generation can be obtained without causing excessive stress on the device, and with little mechanical loss.
以下、図面により本発明の構成を具体的に説明
する。
Hereinafter, the configuration of the present invention will be specifically explained with reference to the drawings.
第１図は、本発明にかかる風力発電装置の一実
施例を示す断面図、第２図は、第１図に示された
風車の翼列展開断面図、第３図は、他の実施例に
於ける風車の翼列展開断面図、第４図は、本実施
例装置を第１図中のＶ−Ｖ線で切断した断面図で
ある。 FIG. 1 is a sectional view showing one embodiment of the wind power generation device according to the present invention, FIG. 2 is an expanded sectional view of the blade row of the wind turbine shown in FIG. 1, and FIG. 3 is another embodiment of the wind turbine generator. FIG. 4 is an exploded sectional view of the blade row of the wind turbine in FIG.
第１図乃至第４図中、２０は支柱、２１はトツ
ププレート、２２はセンターピース、２３はセン
ターピース固定軸、２４は風力増進用のシユラウ
ド、２５，２６はデフユーザ、２７は主支承軸、
２８は補助支承軸、２９，２９はデフユーザ支承
用の固定翼列、３０は静止型の電機子コイル、３
１は風車、３１ａ，３１ａは風車３１の回転翼、
３１ｂは回転翼補強用ステー、３１ｃはボス、３
２，３２は回転子磁石、３３，３４はボールベア
リング、３５はケーブル、３６はウオームホイー
ル、３７はウオームギア、３８はモータ、３９，
４０は上記ウオームホイール３６に取り付けられ
た制御ピン、４１はボールベアリング、４２，４
３は上記シユラウド２４の取付けボス部に差し込
まれ固定されたストツパ、４４はエンコーダ、４
５，４６は制御ピン４０の両側に設けられた接触
探知器、４７，４８はそれらの出力変換器、４９
は制御回路、５０はモータ電源制御回路である。 In FIGS. 1 to 4, 20 is a column, 21 is a top plate, 22 is a center piece, 23 is a center piece fixing shaft, 24 is a shroud for increasing wind power, 25 and 26 are differential users, 27 is a main support shaft,
28 is an auxiliary support shaft, 29, 29 is a fixed blade row for differential user support, 30 is a stationary armature coil, 3
1 is a windmill, 31a, 31a are rotor blades of the windmill 31,
31b is a rotor blade reinforcement stay, 31c is a boss, 3
2 and 32 are rotor magnets, 33 and 34 are ball bearings, 35 is a cable, 36 is a worm wheel, 37 is a worm gear, 38 is a motor, 39,
40 is a control pin attached to the worm wheel 36, 41 is a ball bearing, 42, 4
3 is a stopper inserted into and fixed to the mounting boss portion of the shroud 24; 44 is an encoder; 4
5 and 46 are contact detectors provided on both sides of the control pin 40, 47 and 48 are their output transducers, and 49
50 is a control circuit, and 50 is a motor power supply control circuit.
シユラウド２４は、ボールベアリング４１によ
りセンターピース２２の回りに回動自在に支承さ
れており、且つ、その上部が大きい風見板部分２
４ａとなつているので、シユラウド２４は常にい
ずれか一方の開口が風上に向かうようになつてい
るが、後に説明するように風向きの変動が一定角
度以上に達するときは、一定の角度範囲以上には
回動しないようその方向が制御されるものであ
る。 The shroud 24 is rotatably supported around the center piece 22 by a ball bearing 41, and its upper part is a large weather vane portion 2.
4a, so one of the openings of the shroud 24 always faces upwind, but as will be explained later, when the wind direction fluctuates over a certain angle, the shroud 24 always faces upwind. Its direction is controlled so that it does not rotate.
また、風車３１はボールベアリング３３，３４
を介して主支承軸２７の回りに回動自在に支承さ
れている。而して、風車３１の回転翼３１ａは第
２図にその展開図が示されているように、軸直角
中心面に対して対称な環状翼列となつており、何
れの方向、即ち、図中Ｗ又はW′の何れの方向の
風に対しても、同一の方向、図中Ｒで示す方向に
回転するものである。 The wind turbine 31 also has ball bearings 33, 34.
It is rotatably supported around the main support shaft 27 via. As shown in the developed view of FIG. 2, the rotor blades 31a of the wind turbine 31 are arranged in an annular row of blades symmetrical with respect to the central plane perpendicular to the axis. It rotates in the same direction, the direction indicated by R in the figure, regardless of whether the wind is in the direction W or W'.
風車３１のボス３１ｃには回転子磁石３２が内
蔵されており、この回転子磁石３２は電機子コイ
ル３０と共に一つの発電機を構成し、風車３１の
回転に応じて電機子コイル３０に電流が生じ、こ
の電流はケーブル３５により取り出される。 A rotor magnet 32 is built into the boss 31c of the windmill 31, and together with the armature coil 30, this rotor magnet 32 constitutes one generator, and current is applied to the armature coil 30 according to the rotation of the windmill 31. This current is extracted by cable 35.
ウオームホイール３６は、センターピース２２
の回りに回動自在に取り付けられ、モータ３８に
より回動せしめられるウオームギア３７と噛み合
い、これにより一定の角度範囲で回動せしめられ
るよう構成されている。 The worm wheel 36 is connected to the center piece 22
It is configured to be rotatably attached around the worm gear 37 and mesh with a worm gear 37 that is rotated by a motor 38, so that the worm gear 37 can be rotated within a certain angular range.
即ち、ウオームホイール３６には、一対の制御
ピン３９，４０が取り付けられており、ウオーム
ホイール３６と共に制御ピン３９，４０が第４図
に中実線で示す基準位置から概ね120゜の範囲で時
計方向及び反時計方向に往復回動せしめられるよ
うになつており、その回動位置はエンコーダ４４
によりコード化され、制御回路４９に送られるよ
うに構成されている。 That is, a pair of control pins 39 and 40 are attached to the worm wheel 36, and the control pins 39 and 40 are rotated clockwise along with the worm wheel 36 within a range of approximately 120 degrees from the reference position shown by the solid line in FIG. The rotation position is determined by the encoder 44.
It is configured to be encoded and sent to the control circuit 49.
一方、シユラウド２４のボス部２４ｂには、一
対のストツパ４２が、４３が設けられており、こ
のストツパ４２，４３の先端が制御ピン３９，４
０に当接するので、シユラウド２４の回動角は一
応略180゜の範囲に限定されるものである。 On the other hand, a pair of stoppers 42 and 43 are provided on the boss portion 24b of the shroud 24, and the tips of the stoppers 42 and 43 are connected to the control pins 39 and 43.
0, the rotation angle of the shroud 24 is limited to a range of about 180 degrees.
而して、第４図に示す状態から風向きが変り、
シユラウド２４が反時計方向に角度αだけ回動せ
しめられ、ストツパ４３の先端が制御ピン４０の
側面に設けた接触検知器４５に、一定時間以上連
続して当接すると、上記接触探知器４５が信号を
発信し、その信号は出力変換器４７を経由して制
御回路４９に伝達され、制御回路４９はモータ電
源制御回路５０を作動させ、モータ３８を回動さ
せる。 Then, the wind direction changed from the state shown in Figure 4,
When the shroud 24 is rotated counterclockwise by an angle α and the tip of the stopper 43 continuously contacts the contact detector 45 provided on the side surface of the control pin 40 for a certain period of time or more, the contact detector 45 is activated. A signal is transmitted to the control circuit 49 via the output converter 47, and the control circuit 49 operates the motor power supply control circuit 50 to rotate the motor 38.
このときのモータ３８の回動方向は、シユラウ
ド２４を第４図中時計方向に押戻すよう回動させ
る方向である。而して、シユラウド２４が略90゜
回動せしめられると、風見板部２４ａに作用する
風力のトルクが逆転するので、シユラウド２４は
風力により時計方向に回動せしめられ、制御ピン
４０による制約から開放され、再び風向きに応じ
て自由に回動せしめられるようになる。 The rotating direction of the motor 38 at this time is the direction in which the shroud 24 is pushed back clockwise in FIG. 4. When the shroud 24 is rotated approximately 90 degrees, the torque of the wind force acting on the weather vane portion 24a is reversed, so that the shroud 24 is rotated clockwise by the wind force, and is no longer restricted by the control pin 40. It is opened and can be rotated freely again depending on the direction of the wind.
ウオームホイール３６は、制御ピン３９，４０
が第４図中、３９′，４０′で示す位置に到達する
まて回動せしめられ、一旦その位置に停止する。
この位置はウオームホイール３６の時計方向回動
終端位置である。 The worm wheel 36 has control pins 39, 40
is rotated until it reaches the positions shown at 39' and 40' in FIG. 4, and is temporarily stopped at that position.
This position is the end position of clockwise rotation of the worm wheel 36.
従つて、この状態かから風向きが変り、次にス
トツパ４２又は４３が４０′の位置にある制御ピ
ンに触れると、（ストツパ４２が接触検知器４６
に触れるか、又はストツパ４３が接触検知器４５
に触れるかのどちらにせよ）今度はモータ３８が
逆転してウオームホイール３６を元の実線で示す
基準位置まで反時計方向に回動させるものであ
る。 Therefore, when the wind direction changes from this state and the stopper 42 or 43 touches the control pin at the 40' position, (the stopper 42 touches the contact detector 46
or if the stopper 43 touches the contact detector 45
motor 38 is now reversed to rotate the worm wheel 36 counterclockwise to its original reference position shown by the solid line.
また、その基準位置に於て、他の一方の接触検
知器４６によりストツパ４２又は４３がトリガさ
れると、ウオームホイール３６は、制御ピン３
９，４０がそれぞれ３９″，４０″で示す位置に来
るまで反時計方向に回動せしめられる。この位置
は反時計方向回動終端であり、次にいずれか一方
の接触検知器４５又は４６がトリガされたとき
は、ウオームホイール３６は、再び元の基準位置
にもどされるものである。 Further, when the stopper 42 or 43 is triggered by the other contact detector 46 at the reference position, the worm wheel 36 moves the control pin 3
9 and 40 are rotated counterclockwise until they come to the positions indicated by 39'' and 40'', respectively. This position is the end of the counterclockwise rotation, and the next time either one of the contact detectors 45 or 46 is triggered, the worm wheel 36 is returned to its original reference position.
従つて、風向きが如何ように変化してもシユラ
ウド２４の回動角は一定の範囲内に限定されるの
で、送電用にスリツプリングを用いなくともケー
ブル３５が捩れることがなく、しかも、風車３１
の回転翼３１ａが軸直角中心面に対して対称な環
状翼列となるよう構成されているので、シユラウ
ド２４、即ち、風車３１が反転して裏返しとされ
るときでも、風車３１の回転方向が不変に保たれ
るので、発電が中断したり、装置に無理な応力を
生じるようなことが無いものである。 Therefore, no matter how the wind direction changes, the rotation angle of the shroud 24 is limited to a certain range, so the cable 35 does not get twisted even if a slip ring is not used for power transmission. 31
Since the rotary blades 31a of the rotor blades 31a are configured to form an annular blade row that is symmetrical with respect to the central plane perpendicular to the axis, even when the shroud 24, that is, the wind turbine 31 is turned upside down, the rotation direction of the wind turbine 31 remains unchanged. Since it remains unchanged, it will not interrupt power generation or cause undue stress on the device.
なお、回転翼３１ａとしては、第３図に示す如
き翼列を用いることも可能である。 Incidentally, as the rotary blade 31a, it is also possible to use a blade row as shown in FIG. 3.
本発明は叙上の如く構成されるので、本発明に
かかる風力発電装置によるときには、故障等が殆
どなく、風向きの変化に左右されず、発電が中断
したり、装置に無理な応力が生じることなく、高
い発電量を得ることができる。
Since the present invention is configured as described above, when using the wind power generation device according to the present invention, there are almost no failures, etc., and it is not affected by changes in wind direction, and power generation is not interrupted or unreasonable stress is generated in the device. It is possible to obtain a high amount of power generation.
なお、本発明は叙上の実施例に限定されるもの
ではない。即ち、例えば、風車の形状、支承方
法、方向制御方法等は、本発明の目的の範囲内で
自由に設計変更できるものであつて、本発明はそ
れらの総てを包摂するものである。 Note that the present invention is not limited to the embodiments described above. That is, for example, the shape of the wind turbine, the supporting method, the direction control method, etc. can be freely changed within the scope of the purpose of the present invention, and the present invention encompasses all of them.
第１図は、本発明にかかる風力発電装置の一実
施例を示す断面図、第２図は、第１図に示された
風車の翼列展開断面図、第３図は、他の実施例に
於ける風車の翼列展開断面図、第４図は、本実施
例装置を第１図中のＶ−Ｖ線で切断した断面図で
ある。
２０……支柱、２１……トツププレート、２２
……センターピース、２３……センターピース固
定軸、２４……シユラウド、２５，２６……デフ
ユーザ、２７……主支承軸、２８……補助支承
軸、２９……デフユーザ支承用の固定翼列、３０
……電機子コイル、３１……風車、３１ａ……風
車３１の回転翼、３１ｂ……回転翼補強用ステ
ー、３１ｃ……ボス、３２……回転子磁石、３
３，３４，４１……ボールベアリング、３５……
ケーブル、３６……ウオームホイール、３７……
ウオームギア、３８……モータ、３９，４０……
制御ピン、４２，４３……ストツパ、４４……エ
ンコーダ、４５，４６……接触探知器、４７，４
８……出力変換器、４９……制御回路、５０……
モータ電源制御回路。
FIG. 1 is a sectional view showing one embodiment of the wind power generation device according to the present invention, FIG. 2 is an expanded sectional view of the blade row of the wind turbine shown in FIG. 1, and FIG. 3 is another embodiment of the wind turbine generator. FIG. 4 is a developed sectional view of the blade row of the wind turbine in FIG. 20... Support column, 21... Top plate, 22
... Center piece, 23 ... Center piece fixed shaft, 24 ... Shroud, 25, 26 ... Differential user, 27 ... Main support shaft, 28 ... Auxiliary support shaft, 29 ... Fixed blade row for differential user support, 30
...Armature coil, 31...Windmill, 31a...Rotor blade of windmill 31, 31b...Rotor blade reinforcement stay, 31c...Boss, 32...Rotor magnet, 3
3, 34, 41... ball bearing, 35...
Cable, 36... Worm wheel, 37...
Worm gear, 38...Motor, 39,40...
Control pin, 42, 43... Stopper, 44... Encoder, 45, 46... Contact detector, 47, 4
8... Output converter, 49... Control circuit, 50...
Motor power control circuit.
Claims (1)
とを有する風力発電装置に於いて、 上記発電機が風車と共軸に設けられ、上記風車
が軸直角中心面に対して対称な環状翼列を有し、
上記風車及び発電機の、支軸の回りの回転角を一
回転以内に規制する装置を具備することを特徴と
する上記の風力発電装置。[Claims] 1. In a wind power generation device having a weather vane and a horizontal axis wind turbine that is always directed upwind, the generator is provided coaxially with the wind turbine, and the wind turbine is located on a central plane perpendicular to the axis. It has a symmetrical annular blade row,
The above-mentioned wind power generation device is characterized by comprising a device for regulating the rotation angle of the wind turbine and the generator around the support shaft to within one rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57059739A JPS58176479A (en) | 1982-04-12 | 1982-04-12 | Wind electric power generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57059739A JPS58176479A (en) | 1982-04-12 | 1982-04-12 | Wind electric power generating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58176479A JPS58176479A (en) | 1983-10-15 |
| JPH0118270B2 true JPH0118270B2 (en) | 1989-04-05 |
Family
ID=13121885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57059739A Granted JPS58176479A (en) | 1982-04-12 | 1982-04-12 | Wind electric power generating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58176479A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2518633Y2 (en) * | 1989-12-22 | 1996-11-27 | 株式会社精電舍 | In-vehicle AC generator with gearbox |
| WO2016024028A1 (en) * | 2014-08-13 | 2016-02-18 | Nabrawind Sl | Integration of a generator into a wind turbine transmission system |
| JP6509661B2 (en) * | 2015-07-15 | 2019-05-08 | 誠太 一色 | Wind power generator |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735170A (en) * | 1980-08-12 | 1982-02-25 | Akihiro Okabe | Blade pitch automatic control type windmill |
-
1982
- 1982-04-12 JP JP57059739A patent/JPS58176479A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735170A (en) * | 1980-08-12 | 1982-02-25 | Akihiro Okabe | Blade pitch automatic control type windmill |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58176479A (en) | 1983-10-15 |
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