JP2002130278A - Flywheel type power-storing device and magnetic bearing device - Google Patents
Flywheel type power-storing device and magnetic bearing deviceInfo
- Publication number
- JP2002130278A JP2002130278A JP2000326303A JP2000326303A JP2002130278A JP 2002130278 A JP2002130278 A JP 2002130278A JP 2000326303 A JP2000326303 A JP 2000326303A JP 2000326303 A JP2000326303 A JP 2000326303A JP 2002130278 A JP2002130278 A JP 2002130278A
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- Japan
- Prior art keywords
- magnetic bearing
- flywheel
- magnetic
- type power
- storage device
- 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.)
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Classifications
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Landscapes
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、系統電力の瞬停、
停電または電圧変動に有効なフライホイール形電力貯蔵
装置に関し、また、フライホイール形電力貯蔵装置及び
その他に用いる磁気軸受装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to instantaneous
The present invention relates to a flywheel-type power storage device effective against power failure or voltage fluctuation, and also relates to a flywheel-type power storage device and a magnetic bearing device used for others.
【０００２】[0002]
【従来の技術】フライホイール形電力貯蔵装置は、環境
にやさしいエネルギー貯蔵装置として注目されている。
フライホイール形電力貯蔵装置の原理は、発電・電動機
に設けたフライホイールを高速回転させて系統電力の電
気エネルギーを回転エネルギー（機械エネルギー）とし
て一時的に貯蔵し、系統電力の瞬停、停電または電圧変
動時にその貯蔵した回転エネルギーを再度電気エネルギ
ーに変換し、その電気エネルギーを系統電力へ供給する
というものである。2. Description of the Related Art A flywheel type power storage device has attracted attention as an environmentally friendly energy storage device.
The principle of the flywheel type power storage device is that the flywheel provided in the generator / motor is rotated at high speed to temporarily store the electric energy of the system power as rotational energy (mechanical energy), and to temporarily stop the system power, When the voltage fluctuates, the stored rotational energy is converted into electric energy again, and the electric energy is supplied to the system power.
【０００３】現在、フライホイール形電力貯蔵装置の小
型化及び貯蔵容量の大容量化のため、フライホイールの
高速回転化が図られている。しかし、フライホイールが
高速回転すれば機械損失、特に軸受の損失が大きくなる
ために、電力貯蔵装置の効率が下がるという問題があっ
た。この軸受の損失問題の解決技術として、軸受の磁気
軸受化や、超伝導磁気軸受化が開発されている。At present, high-speed rotation of the flywheel is being attempted in order to reduce the size of the flywheel type power storage device and increase the storage capacity. However, when the flywheel rotates at a high speed, mechanical loss, particularly bearing loss, increases, and thus there is a problem that the efficiency of the power storage device decreases. As a technology for solving the bearing loss problem, a magnetic bearing or a superconducting magnetic bearing has been developed.
【０００４】図２に、フライホイール形電力貯蔵装置の
軸受に磁気軸受を採用した従来例を示す。図２中の符号
で、４は磁気軸受用ディスクを兼ねたフライホイール、
８は回転軸、２０、２１はスラスト方向磁気軸受、２
２、２３はラジアル方向磁気軸受を示す。また、５、６
及び７は外枠、上部端板及び下部端板、１１、１２はギ
ャップセンサ、１３は磁気軸受制御装置、２０ａ及び２
１ａは各スラスト方向磁気軸受の磁極を示す。FIG. 2 shows a conventional example in which a magnetic bearing is employed as a bearing of a flywheel type power storage device. In FIG. 2, reference numeral 4 denotes a flywheel which also serves as a magnetic bearing disk,
8 is a rotating shaft, 20 and 21 are magnetic bearings in the thrust direction, 2
Reference numerals 2 and 23 denote radial magnetic bearings. Also, 5, 6
And 7 are an outer frame, an upper end plate and a lower end plate, 11 and 12 are gap sensors, 13 is a magnetic bearing control device, and 20a and 2
1a shows the magnetic pole of each thrust direction magnetic bearing.
【０００５】図２に示すように、従来より、磁気軸受の
みで回転軸付きフライホイール４を回転させる時は、フ
ライホイール４のスラスト方向荷重を支えるためにフラ
イホイール４の上部と下部にスラスト方向磁気軸受２
０、２１を設けると共に、回転軸８のラジアル方向荷重
を支えるためにフライホイール４の上部と下部にラジア
ル方向磁気軸受２２、２３を設けるので、計４個の磁気
軸受が必要であった。As shown in FIG. 2, conventionally, when a flywheel 4 with a rotating shaft is rotated only by a magnetic bearing, the upper and lower portions of the flywheel 4 are provided with a thrust direction in order to support the load of the flywheel 4 in the thrust direction. Magnetic bearing 2
0 and 21 are provided, and radial magnetic bearings 22 and 23 are provided on the upper and lower portions of the flywheel 4 to support the radial load of the rotating shaft 8, so that a total of four magnetic bearings are required.
【０００６】また、磁気軸受の個数を減らすために、ス
ラスト方向については上部のスラスト方向磁気軸受２０
または下部のスラスト方向磁気軸受２１の片方のみとす
る構造はあるが、ラジアル方向については、軸の偏芯を
抑えるために、フライホイール４の上下部両方にラジア
ル方向磁気軸受２２、２３を設ける必要あった。In order to reduce the number of magnetic bearings, the upper thrust direction magnetic bearing 20 is used in the thrust direction.
Alternatively, there is a structure in which only one of the lower thrust magnetic bearings 21 is provided, but in the radial direction, radial magnetic bearings 22 and 23 need to be provided on both the upper and lower parts of the flywheel 4 in order to suppress eccentricity of the shaft. there were.
【０００７】[0007]
【発明が解決しようとする課題】しかし、下記に示すよ
うに、磁気軸受装置の構造がフライホイール形電力貯蔵
装置全体の構造に及ぼす影響は大きい。 (1) 従来の磁気軸受装置はスラスト方向磁気軸受２０、
２１とラジアル方向磁気軸受２２、２３に分かれている
ため、磁気軸受装置はもとより、フライホイール形電力
貯蔵装置全体の体格が大きくなる。 (2) 上部のラジアル方向磁気軸受２２がフライホイール
４から軸方向外側に離れて位置する結果、回転部分の軸
方向長さが長くなるため、磁気軸受装置はもとより、フ
ライホイール形電力貯蔵装置が危険速度による制限を受
ける。 (3) フライホイール４の位置制御を考えると、上下部の
ラジアル方向磁気軸受２２、２３はフライホイール４よ
り半径が極めて小さい回転軸８に望むため、フライホイ
ール４の回転ブレを抑えるには位置制御に大きな磁力を
必要とする。However, as described below, the structure of the magnetic bearing device greatly affects the structure of the flywheel type power storage device as a whole. (1) The conventional magnetic bearing device is a thrust direction magnetic bearing 20,
21 and the radial magnetic bearings 22 and 23, the physical size of the entire flywheel type power storage device as well as the magnetic bearing device is increased. (2) As a result of the upper radial magnetic bearing 22 being located axially outward from the flywheel 4, the axial length of the rotating portion becomes longer, so that not only the magnetic bearing device but also the flywheel type power storage device Limited by dangerous speed. (3) Considering the position control of the flywheel 4, since the radial magnetic bearings 22 and 23 at the upper and lower portions are desired to be on the rotating shaft 8 having an extremely small radius than the flywheel 4, the position of the flywheel 4 must be reduced. Requires large magnetic force for control.
【０００８】一方、特開平４−２６２１１８号公報「磁
気軸受装置」のように、姿勢制御用フライホイールでは
軸中心部分を磁気軸受化する方式が採用されているもの
があるが、フライホイール形電力貯蔵装置に適用される
ものではない。On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 4-262118, "Magnetic bearing device", a flywheel for attitude control employs a system in which a shaft center portion is formed as a magnetic bearing. It does not apply to storage devices.
【０００９】本発明の課題は、上記問題点を解消するこ
とが可能なフライホイール形電力貯蔵装置及び磁気軸受
装置を提供することである。An object of the present invention is to provide a flywheel type power storage device and a magnetic bearing device which can solve the above problems.
【００１０】[0010]
【課題を解決するための手段】請求項１に係る発明はフ
ライホイール形電力貯蔵装置であり、縦軸形発電・電動
機と、前記発電・電動機の回転軸に結合した磁気軸受用
ディスクを兼ねるフライホイールと、前記フライホイー
ルの上端縁部の全周に形成された上部傾斜面と、前記フ
ライホイールの下端縁部の全周に形成された下部傾斜面
と、磁極が前記上部傾斜面に対向した上部磁気軸受と、
磁極が前記下部傾斜面に対向した下部磁気軸受を具備す
ることを特徴とする。According to a first aspect of the present invention, there is provided a flywheel type power storage device, wherein the flywheel serves as a longitudinal axis type generator / motor and a magnetic bearing disk coupled to a rotating shaft of the generator / motor. A wheel, an upper inclined surface formed all around the upper edge of the flywheel, a lower inclined surface formed all around the lower edge of the flywheel, and a magnetic pole facing the upper inclined surface. An upper magnetic bearing,
The magnetic pole is provided with a lower magnetic bearing facing the lower inclined surface.
【００１１】請求項２に係る発明のフライホイール形電
力貯蔵装置は、請求項１において、前記上部磁気軸受及
び前記下部磁気軸受のうち、一方はリング状の一体型磁
極を有し、他方は複数個の独立した磁極を有すること特
徴とする。According to a second aspect of the present invention, in the flywheel type power storage device according to the first aspect, one of the upper magnetic bearing and the lower magnetic bearing has a ring-shaped integral magnetic pole, and the other has a plurality of magnetic poles. It is characterized by having two independent magnetic poles.
【００１２】請求項３に係る発明のフライホイール形電
力貯蔵装置は、請求項１または２において、前記発電・
電動機はアウターロータ構造であり、該発電・電動機の
ロータは前記フライホイールに形成した環状凹部の内周
面に設置されていることを特徴とする。According to a third aspect of the present invention, there is provided a flywheel type power storage device according to the first or second aspect, wherein
The motor has an outer rotor structure, and the rotor of the generator / motor is provided on an inner peripheral surface of an annular recess formed in the flywheel.
【００１３】請求項４に係る発明は磁気軸受装置であ
り、磁気軸受用ディスクと、前記磁気軸受用ディスクを
両端から支持する一端側磁気軸受及び他端側磁気軸受を
具備する磁気軸受装置において、前記磁気軸受用ディス
クの両端縁部全周に傾斜面が形成され、前記一端側磁気
軸受の磁極は一端側縁部の前記傾斜面に対向し、前記他
端側磁気軸受の磁極は他端側縁部の前記傾斜面に対向す
ることを特徴とする。According to a fourth aspect of the present invention, there is provided a magnetic bearing device, comprising: a magnetic bearing disk; one end magnetic bearing for supporting the magnetic bearing disk from both ends; and another end magnetic bearing. An inclined surface is formed on the entire periphery of both end edges of the magnetic bearing disk, the magnetic pole of the one end side magnetic bearing faces the inclined surface of the one end side edge, and the magnetic pole of the other end side magnetic bearing is the other end side. It is characterized in that it faces the inclined surface of the edge.
【００１４】[0014]
【発明の実施の形態】以下、図１を参照して、本発明の
実施形態例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
【００１５】磁極がフライホイールの上部傾斜面に対向
した上部磁気軸及び磁極がフライホイールの下部傾斜面
に対向した下部磁気軸受はともに、ラジアル方向及びス
ラスト方向を同時に制御できる。従って、ラジアル方向
磁気軸受とスラスト方向磁気軸受に分かれている従来の
磁気軸受装置を使用する場合に比べフライホイール形電
力貯蔵装置全体の体格も、磁気軸受装置の体格も小さく
なる。また、回転部分の軸方向長さが従来よりも短くな
り、危険速度による制限が緩和する。Both the upper magnetic shaft whose magnetic pole faces the upper inclined surface of the flywheel and the lower magnetic bearing whose magnetic pole faces the lower inclined surface of the flywheel can simultaneously control the radial direction and the thrust direction. Therefore, the size of the flywheel-type power storage device as a whole and the size of the magnetic bearing device are smaller than those in the case of using a conventional magnetic bearing device which is divided into a radial magnetic bearing and a thrust magnetic bearing. In addition, the axial length of the rotating part is shorter than before, and the restriction due to the critical speed is reduced.
【００１６】［フライホイール形電力貯蔵装置］図１を
参照して、本発明の実施形態例に係るフライホイール形
電力貯蔵装置を説明する。図１は同フライホイール形電
力貯蔵装置の縦断面構造を示す。[Flywheel type power storage device] A flywheel type power storage device according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a vertical cross-sectional structure of the flywheel type power storage device.
【００１７】図１に示すフライホイール形電力貯蔵装置
は、縦軸形の発電・電動機１と、上部磁気軸受２と、下
部磁気軸受３と、磁気軸受用ディスクを兼ねた大径且つ
厚いフライホイール４から構成され、これらはケーシン
グに収納されている。ケーシングは円筒形の外枠５と、
該外枠５の上下両端に固定された円形の端板６、７から
構成される。発電・電動機１は充電時にフライホイール
４を回転駆動し、放電時にフライホイール４の回転エネ
ルギーを元に発電する。本例の発電・電動機１はアウタ
ーロータ構造のものである。フライホイール４は発電・
電動機１の回転軸８と結合されている。本例ではフライ
ホイール４と回転軸８を一体に形成しているが、別々に
作製したものでも良い。The flywheel type power storage device shown in FIG. 1 is a large-diameter and thick flywheel which also serves as a vertical-axis generator / motor 1, an upper magnetic bearing 2, a lower magnetic bearing 3, and a magnetic bearing disk. 4 which are housed in a casing. The casing has a cylindrical outer frame 5,
It comprises circular end plates 6 and 7 fixed to the upper and lower ends of the outer frame 5. The generator / motor 1 drives the flywheel 4 to rotate during charging, and generates power based on the rotational energy of the flywheel 4 during discharging. The generator / motor 1 of this embodiment has an outer rotor structure. Flywheel 4
It is connected to the rotating shaft 8 of the electric motor 1. In this example, the flywheel 4 and the rotating shaft 8 are formed integrally, but they may be manufactured separately.
【００１８】上部磁気軸受２と下部磁気軸受３はフライ
ホイール４の上下両縁部に斜めに対向して位置し、それ
ぞれフライホイール４をラジアル方向とスラスト方向同
時に制御できる磁気軸受である。従って、フライホイー
ル形電力貯蔵装置の体格が小さくなり、また、回転部分
の軸方向長さが短縮する。The upper magnetic bearing 2 and the lower magnetic bearing 3 are diagonally opposed to the upper and lower edges of the flywheel 4, and are magnetic bearings capable of controlling the flywheel 4 simultaneously in the radial and thrust directions. Therefore, the size of the flywheel type power storage device is reduced, and the axial length of the rotating portion is reduced.
【００１９】具体的には、フライホイール４の上下両端
縁部の全周を斜めに形成して傾斜面９、１０を環状に形
成してあり、上部磁気軸受２が上部傾斜面９に隙間をお
いて対向するように、その磁極２ａを斜め内側下向きに
上部端板６に固定し、また、下部磁気軸受３が下部傾斜
面１０に隙間をおいて対向するように、その磁極３ａを
斜め内側上向きに下部端板７に固定してある。フライホ
イール４は上部磁気軸受２、下部磁気軸受３とそれぞれ
磁気的に結合されるので、全体、あるいは、少なくとも
上部磁気軸受２や下部磁気軸受３に対向する傾斜面９、
１０部分が通常の磁性体または超伝導体で形成される。Specifically, the entire periphery of the upper and lower ends of the flywheel 4 is formed obliquely, and the inclined surfaces 9 and 10 are formed in an annular shape. The magnetic pole 2a is fixed to the upper end plate 6 so as to face diagonally inward and downward so that the lower magnetic bearing 3 faces the lower inclined surface 10 with a gap therebetween. It is fixed upward to the lower end plate 7. Since the flywheel 4 is magnetically coupled to the upper magnetic bearing 2 and the lower magnetic bearing 3, respectively, the entire or at least the inclined surface 9 facing the upper magnetic bearing 2 and the lower magnetic bearing 3.
Ten parts are formed of a normal magnetic or superconductor.
【００２０】これにより、上部磁気軸受２の磁極２ａに
装着した巻線２ｂに流れる電流、並びに、下部磁気軸受
３の磁極３ａに装着した巻線３ｂに流れる電流を調整す
ることにより、フライホイール４の磁気浮上を、ラジア
ル方向とスラスト方向同時に制御できる。By adjusting the current flowing through the winding 2b mounted on the magnetic pole 2a of the upper magnetic bearing 2 and the current flowing through the winding 3b mounted on the magnetic pole 3a of the lower magnetic bearing 3, the flywheel 4 Magnetic levitation can be controlled simultaneously in the radial and thrust directions.
【００２１】詳しくは、フライホイール４の軸方向変位
を検出するギャップセンサ１１と半径方向変位を検出す
るギャップセンサ１２を設け、両ギャップセンサ１１、
１２の検出出力を磁気軸受制御装置１３に入力し、軸方
向検出値及び半径方向検出値が所定の範囲内となるよう
に、上部磁気軸受２の巻線２ｂに流す電流と下部磁気軸
受３の巻線３ｂに流す電流を磁気軸受制御装置１３によ
り調整する。More specifically, a gap sensor 11 for detecting the axial displacement of the flywheel 4 and a gap sensor 12 for detecting the radial displacement are provided.
The detected output of the upper magnetic bearing 2 is input to the magnetic bearing controller 13 and the current flowing through the winding 2b of the upper magnetic bearing 2 and the lower magnetic bearing 3 are adjusted so that the detected value in the axial direction and the detected value in the radial direction are within predetermined ranges. The current flowing through the winding 3b is adjusted by the magnetic bearing control device 13.
【００２２】上部磁気軸受２及び下部磁気軸受３の磁極
構造は、下記(1)(2)に示すように２種類考えられ、どれ
を選択しても良い。 (1) 上部磁気軸受２の磁極２ａ及び下部磁気軸受３の磁
極３ａを共に複数個の独立した磁極とする。この場合、
磁極数が多いため、フライホイール４のスラスト方向及
びラジアル方向の位置制御は複雑化するが、独立した個
々の磁極２ａ、３ａを任意に制御できるので、精度が良
いという利点がある。 (2) 上部磁気軸受２の磁極２ａと、下部磁気軸受３の磁
極３ａのうち、一方のみをリング状の一体型磁極とし、
他方を複数個の独立した磁極とする。この場合、独立し
た個々の磁極２ａ（または３ａ）を任意に制御できるの
で、制御は上記(1) より簡単であり、しかも、精度は上
記(1) に近いという利点があり、実用的である。The magnetic pole structure of the upper magnetic bearing 2 and the lower magnetic bearing 3 can be considered as two types as shown in the following (1) and (2), and any one may be selected. (1) The magnetic pole 2a of the upper magnetic bearing 2 and the magnetic pole 3a of the lower magnetic bearing 3 are both a plurality of independent magnetic poles. in this case,
Since the number of magnetic poles is large, the position control of the flywheel 4 in the thrust direction and the radial direction is complicated, but since the independent individual magnetic poles 2a and 3a can be arbitrarily controlled, there is an advantage that accuracy is good. (2) Only one of the magnetic pole 2a of the upper magnetic bearing 2 and the magnetic pole 3a of the lower magnetic bearing 3 is a ring-shaped integral magnetic pole,
The other is a plurality of independent magnetic poles. In this case, since the independent individual magnetic poles 2a (or 3a) can be arbitrarily controlled, the control is simpler than the above (1) and the accuracy is close to the above (1), which is practical. .
【００２３】また、本例では、フライホイール４の下部
を回転軸８の下端部に相当する中央部分を残して円形に
抉り、そこに形成された環状凹部の内周面に発電・電動
機１のロータ１４を取り付けてある。これにより、フラ
イホイール形電力貯蔵装置の回転部分の軸方向長さが一
層短縮する。Further, in this embodiment, the lower portion of the flywheel 4 is hollowed out in a circular shape leaving a central portion corresponding to the lower end portion of the rotating shaft 8, and the inner surface of the annular recess formed therein is provided with the generator / motor 1 The rotor 14 is attached. Thereby, the axial length of the rotating portion of the flywheel type power storage device is further reduced.
【００２４】更に、本例では、上部磁気軸受２及び下部
磁気軸受３の他に、緊急時に発電・電動機１の回転軸８
を支持するために、通常のラジアル軸受１５と通常のア
ンギュラ軸受１６を用いている。Further, in this embodiment, in addition to the upper magnetic bearing 2 and the lower magnetic bearing 3, the rotating shaft 8 of the generator / motor 1 is used in an emergency.
, A normal radial bearing 15 and a normal angular bearing 16 are used.
【００２５】詳しくは、通常のラジアル軸受１５を上部
端板６の中央部に形成した孔に取り付け、これに回転軸
８の上端部を貫通して支持する。通常のアンギュラ軸受
１６は先端筒状の軸受箱１７内に収容され、該軸受箱１
７は下部端板７の中央部に取り付けらている。従って、
通常のアンギュラ軸受１６を軸受箱１７と一緒にフライ
ホイール４下部の環状凹部に挿入することにより、回転
軸８の下端部を支持する。More specifically, a normal radial bearing 15 is attached to a hole formed in the center of the upper end plate 6, and the upper end of the rotating shaft 8 is supported therethrough. The normal angular bearing 16 is housed in a cylindrical bearing box 17 having a tip end.
7 is attached to the center of the lower end plate 7. Therefore,
The lower end of the rotating shaft 8 is supported by inserting a normal angular bearing 16 together with the bearing box 17 into an annular concave portion below the flywheel 4.
【００２６】ステータ１８は上記軸受箱１７の円筒外周
に固定され、ロータ１４の内側に位置する。これによ
り、フライホイール形電力貯蔵装置の回転部分の軸方向
長さが一層短縮する。The stator 18 is fixed to the outer circumference of the bearing housing 17 and is located inside the rotor 14. Thereby, the axial length of the rotating portion of the flywheel type power storage device is further reduced.
【００２７】［磁気軸受装置］図１に示したフライホイ
ール形電力貯蔵装置中、フライホイール４を適宜な厚さ
と径を持つ磁気軸受用ディスクとすることにより、任意
の回転体に対する磁気軸受装置が構成される。[Magnetic Bearing Device] In the flywheel type power storage device shown in FIG. 1, the flywheel 4 is a magnetic bearing disk having an appropriate thickness and diameter so that a magnetic bearing device for an arbitrary rotating body can be obtained. Be composed.
【００２８】具体的には、磁気軸受用ディスク４と、こ
の磁気軸受用ディスクを両側から支持する２つの磁気軸
受２、３を具備する磁気軸受装置であり、磁気軸受用デ
ィスク４の両端縁部全周に傾斜面９、１０が形成され、
磁気軸受２の磁極２ａは傾斜面９に対向し、磁気軸受３
の磁極３ａは傾斜面１０に対向することにより、各磁気
軸受２、３はラジアル方向及びスラスト方向同時に制御
できるものである。詳しくは、磁気軸受用ディスク４の
軸方向変位を検出するギャップセンサ１１と半径方向変
位を検出するギャップセンサ１２を設け、両ギャップセ
ンサ１１、１２の検出出力を磁気軸受制御装置１３に入
力し、軸方向検出値及び半径方向検出値が所定の範囲内
となるように、各磁気軸受の巻線２ｂ、３ｂに流す電流
を磁気軸受制御装置１３により調整する。More specifically, the magnetic bearing device comprises a magnetic bearing disk 4 and two magnetic bearings 2 and 3 for supporting the magnetic bearing disk from both sides. Slope surfaces 9 and 10 are formed all around,
The magnetic pole 2 a of the magnetic bearing 2 faces the inclined surface 9,
The magnetic poles 3a oppose the inclined surface 10 so that the magnetic bearings 2 and 3 can be controlled simultaneously in the radial direction and the thrust direction. Specifically, a gap sensor 11 for detecting the axial displacement of the magnetic bearing disk 4 and a gap sensor 12 for detecting the radial displacement are provided, and the detection outputs of both the gap sensors 11 and 12 are input to the magnetic bearing control device 13. The current flowing through the windings 2b, 3b of each magnetic bearing is adjusted by the magnetic bearing control device 13 so that the detected value in the axial direction and the detected value in the radial direction are within predetermined ranges.
【００２９】これにより、ラジアル方向磁気軸受とスラ
スト方向磁気軸受に分かれている磁気軸受装置に比べ、
磁気軸受装置の体格が小さくなる。また、回転部分の軸
方向長さが従来よりも短くなり、危険速度による制限が
緩和する。これらは、回転体が縦軸形、横軸形いずれで
あっても、実現可能である。磁極構造（リング状一体型
磁極と複数個の独立した磁極）については、前述した通
りである。As a result, compared with a magnetic bearing device which is divided into a radial magnetic bearing and a thrust magnetic bearing,
The physical size of the magnetic bearing device is reduced. In addition, the axial length of the rotating part is shorter than before, and the restriction due to the critical speed is reduced. These can be realized regardless of whether the rotating body has a vertical axis or a horizontal axis. The magnetic pole structure (the ring-shaped integrated magnetic pole and a plurality of independent magnetic poles) is as described above.
【００３０】[0030]
【発明の効果】以上説明したように、本発明のフライホ
イール形電力貯蔵装置によれば、下記の効果がある。 (1) 上部磁気軸受の磁極がフライホイールの上部傾斜面
に対向し、且つ、下部磁気軸受の磁極がフライホイール
の下部傾斜面に対向するので、両磁気軸受ともにラジア
ル方向及びスラスト方向を同時に制御できる。従って、
ラジアル方向磁気軸受とスラスト方向磁気軸受に分かれ
ている従来の磁気軸受装置を使用する場合に比べフライ
ホイール形電力貯蔵装置全体の体格も、磁気軸受装置の
体格も小さくなる。また、回転部分の軸方向長さが従来
よりも短くなり、危険速度による制限が緩和する。 (2) 上部磁気軸受及び下部磁気軸受のうち、一方の磁極
をリング状の一体型磁極とし、他方の磁極を複数個の独
立した磁極とすることにより、フライホイールのスラス
ト方向及びラジアル方向の位置制御が比較的簡単にな
り、しかも、比較的良好な精度が得られる。 (3) 発電・電動機をアウターロータ構造とし、そのロー
タをフライホイールに形成した環状凹部の内周面に設置
することにより、フライホイール形電力貯蔵装置全体の
体格及び回転部分の軸方向長さが一層小さくなる。As described above, the flywheel type power storage device of the present invention has the following effects. (1) Since the magnetic pole of the upper magnetic bearing faces the upper inclined surface of the flywheel, and the magnetic pole of the lower magnetic bearing faces the lower inclined surface of the flywheel, both magnetic bearings simultaneously control the radial and thrust directions. it can. Therefore,
Compared to the case of using a conventional magnetic bearing device which is divided into a radial magnetic bearing and a thrust magnetic bearing, the size of the flywheel type power storage device as a whole and the size of the magnetic bearing device are reduced. In addition, the axial length of the rotating part is shorter than before, and the restriction due to the critical speed is reduced. (2) Of the upper magnetic bearing and the lower magnetic bearing, one of the magnetic poles is a ring-shaped integral magnetic pole, and the other magnetic pole is a plurality of independent magnetic poles, so that the flywheel position in the thrust direction and the radial direction is obtained. Control is relatively simple, and relatively good accuracy is obtained. (3) The generator / motor has an outer rotor structure, and the rotor is installed on the inner peripheral surface of the annular concave portion formed in the flywheel, so that the physical size of the entire flywheel type power storage device and the axial length of the rotating portion are reduced. It becomes even smaller.
【００３１】また、本発明の磁気軸受装置はフライホイ
ール形電力貯蔵装置以外にも適用可能であり、ラジアル
方向磁気軸受とスラスト方向磁気軸受に分かれている磁
気軸受装置に比べ、磁気軸受装置の体格が小さくなる。
また、回転部分の軸方向長さが従来よりも短くなり、危
険速度による制限が緩和する。体格が小さくなることに
より、製作コストが低下する。Further, the magnetic bearing device of the present invention can be applied to devices other than the flywheel type power storage device, and the physical size of the magnetic bearing device is different from that of the magnetic bearing device which is divided into a radial magnetic bearing and a thrust magnetic bearing. Becomes smaller.
In addition, the axial length of the rotating part is shorter than before, and the restriction due to the critical speed is reduced. As the physique decreases, the production cost decreases.
【図１】本発明の実施形態例に係るフライホイール形電
力貯蔵装置の縦断面構造を示す図。FIG. 1 is a view showing a vertical cross-sectional structure of a flywheel type power storage device according to an embodiment of the present invention.
【図２】従来のフライホイール形電力貯蔵装置の縦断面
構造を示す図。FIG. 2 is a diagram showing a vertical cross-sectional structure of a conventional flywheel type power storage device.
１ 発電・電動機 ２ 上部磁気軸受 ２ａ 上部磁気軸受の磁極 ２ｂ 巻線 ３ 下部磁気軸受 ３ａ 下部磁気軸受の磁極 ３ｂ 巻線 ４ 磁気軸受用ディスクを兼ねたフライホイール ５ 外枠 ６ 上部端板 ７ 下部端板 ８ 回転軸 ９ 上部傾斜面 １０ 下部傾斜面 １１ 軸方向ギャップセンサ １２ 半径方向ギャップセンサ １３ 磁気軸受制御装置 １４ ロータ １５ 通常のラジアル軸受 １６ 通常のアンギュラ軸受 １７ 軸受箱 １８ ステータ Reference Signs List 1 generator / motor 2 upper magnetic bearing 2a magnetic pole of upper magnetic bearing 2b winding 3 lower magnetic bearing 3a magnetic pole of lower magnetic bearing 3b winding 4 flywheel also serving as disk for magnetic bearing 5 outer frame 6 upper end plate 7 lower end Plate 8 Rotating shaft 9 Upper inclined surface 10 Lower inclined surface 11 Axial gap sensor 12 Radial gap sensor 13 Magnetic bearing control device 14 Rotor 15 Normal radial bearing 16 Normal angular bearing 17 Bearing box 18 Stator
Claims (4)
機の回転軸に結合した磁気軸受用ディスクを兼ねるフラ
イホイールと、前記フライホイールの上端縁部の全周に
形成された上部傾斜面と、前記フライホイールの下端縁
部の全周に形成された下部傾斜面と、磁極が前記上部傾
斜面に対向した上部磁気軸受と、磁極が前記下部傾斜面
に対向した下部磁気軸受を具備することを特徴とするフ
ライホイール形電力貯蔵装置。1. A longitudinal axis type generator / motor, a flywheel serving also as a magnetic bearing disk coupled to a rotating shaft of the generator / motor, and an upper inclined surface formed on the entire periphery of an upper end edge of the flywheel. A lower inclined surface formed all around the lower edge of the flywheel, an upper magnetic bearing having a magnetic pole facing the upper inclined surface, and a lower magnetic bearing having a magnetic pole facing the lower inclined surface. A flywheel type power storage device characterized by the above-mentioned.
貯蔵装置において、前記上部磁気軸受及び前記下部磁気
軸受のうち、一方はリング状の一体型磁極を有し、他方
は複数個の独立した磁極を有すること特徴とするフライ
ホイール形電力貯蔵装置。2. The flywheel power storage device according to claim 1, wherein one of the upper magnetic bearing and the lower magnetic bearing has a ring-shaped integral magnetic pole, and the other has a plurality of independent magnetic poles. A flywheel-type power storage device having a magnetic pole.
ル形電力貯蔵装置において、前記発電・電動機はアウタ
ーロータ構造であり、該発電・電動機のロータは前記フ
ライホイールに形成した環状凹部の内周面に設置されて
いることを特徴とするフライホイール形電力貯蔵装置。3. The flywheel type power storage device according to claim 1, wherein the generator / motor has an outer rotor structure, and a rotor of the generator / motor has an inner periphery of an annular recess formed in the flywheel. A flywheel type power storage device which is installed on a surface.
ディスクを両端から支持する一端側磁気軸受及び他端側
磁気軸受を具備する磁気軸受装置において、前記磁気軸
受用ディスクの両端縁部全周に傾斜面が形成され、前記
一端側磁気軸受の磁極は一端側縁部の前記傾斜面に対向
し、前記他端側磁気軸受の磁極は他端側縁部の前記傾斜
面に対向することを特徴とする磁気軸受装置。4. A magnetic bearing device comprising a magnetic bearing disk, one end magnetic bearing supporting the magnetic bearing disk from both ends, and the other end magnetic bearing, the entire periphery of both ends of the magnetic bearing disk. An inclined surface is formed, a magnetic pole of the one end side magnetic bearing faces the inclined surface of one end side edge, and a magnetic pole of the other end side magnetic bearing faces the inclined surface of the other end side edge. Characteristic magnetic bearing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000326303A JP2002130278A (en) | 2000-10-26 | 2000-10-26 | Flywheel type power-storing device and magnetic bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000326303A JP2002130278A (en) | 2000-10-26 | 2000-10-26 | Flywheel type power-storing device and magnetic bearing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002130278A true JP2002130278A (en) | 2002-05-09 |
Family
ID=18803517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000326303A Withdrawn JP2002130278A (en) | 2000-10-26 | 2000-10-26 | Flywheel type power-storing device and magnetic bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002130278A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130032601A (en) * | 2011-09-23 | 2013-04-02 | 한국전력공사 | Emergency bearing and flywheel energy storage device using the same |
| JP2015502130A (en) * | 2011-11-13 | 2015-01-19 | ロートエナジー ホールディングス, リミテッドRotenergy Holdings, Ltd. | Electromechanical flywheel |
| CN107327488A (en) * | 2017-08-29 | 2017-11-07 | 南京磁谷科技有限公司 | A kind of mounting seat for being used to tilt magnetic pole in magnetic bearing |
| CN107387561A (en) * | 2017-08-29 | 2017-11-24 | 南京磁谷科技有限公司 | A kind of chair type magnetic pole mounting structure of sloping magnetic poles magnetic bearing |
| CN109274206A (en) * | 2018-12-06 | 2019-01-25 | 哈尔滨电气股份有限公司 | The curved surface variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
| CN109450157A (en) * | 2018-12-06 | 2019-03-08 | 哈尔滨电气股份有限公司 | The big energy storage capacity variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
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-
2000
- 2000-10-26 JP JP2000326303A patent/JP2002130278A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130032601A (en) * | 2011-09-23 | 2013-04-02 | 한국전력공사 | Emergency bearing and flywheel energy storage device using the same |
| KR101683674B1 (en) | 2011-09-23 | 2016-12-08 | 한국전력공사 | Emergency bearing and Flywheel energy storage device using the same |
| JP2015502130A (en) * | 2011-11-13 | 2015-01-19 | ロートエナジー ホールディングス, リミテッドRotenergy Holdings, Ltd. | Electromechanical flywheel |
| US9673680B2 (en) | 2011-11-13 | 2017-06-06 | Rotonix Hong Kong Limited | Electromechanical flywheels |
| JP2017200435A (en) * | 2011-11-13 | 2017-11-02 | ロトニックス ホンコン リミテッド | Electromechanical flywheel |
| CN107387561A (en) * | 2017-08-29 | 2017-11-24 | 南京磁谷科技有限公司 | A kind of chair type magnetic pole mounting structure of sloping magnetic poles magnetic bearing |
| CN107327488A (en) * | 2017-08-29 | 2017-11-07 | 南京磁谷科技有限公司 | A kind of mounting seat for being used to tilt magnetic pole in magnetic bearing |
| CN109274206A (en) * | 2018-12-06 | 2019-01-25 | 哈尔滨电气股份有限公司 | The curved surface variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
| CN109450157A (en) * | 2018-12-06 | 2019-03-08 | 哈尔滨电气股份有限公司 | The big energy storage capacity variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
| CN109510381A (en) * | 2018-12-06 | 2019-03-22 | 哈尔滨电气股份有限公司 | The ladder variable cross-section rotor flywheel energy storage system of Permanent-magnet bearing and electromagnetic bearing mixing bearing |
| WO2020183582A1 (en) * | 2019-03-11 | 2020-09-17 | 株式会社安川電機 | Flywheel power storage system |
| JPWO2020183582A1 (en) * | 2019-03-11 | 2020-09-17 | ||
| JP7259936B2 (en) | 2019-03-11 | 2023-04-18 | 株式会社安川電機 | flywheel power storage system |
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